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1. Open rubber mixer Mainly used for hot refining, pressing, breaking, plasticizing, and mixing of rubber. It consists of rollers, roller bearings, roller pitch adjustment device, emergency braking device, frame, machine base, transmission device, and heating and cooling system. The working principle of an open rubber refining machine is that raw rubber or rubber material is pulled into the roller gap by friction between two opposite rotating rollers at different speeds, and is subjected to strong shear and compression to increase plasticity. This double roller open type rubber mixing machine began production in 1826. Its structure is relatively simple and still widely used in modern times. 2. Closed rubber mixer Mainly used for rubber molding and mixing. It has an additional mixing chamber than an open rubber mixer. After the raw rubber and blending agent are loaded into the mixing chamber from the feeding hopper, the material door is closed, and the top bolt of the pressing device is pressed down. The two rotors in the mixing chamber rotate in opposite directions at different or the same speed. The loaded rubber material is subjected to continuous stirring, folding, and strong kneading between the rotors and the mixing chamber, resulting in oxidation and chain breakage, increasing plasticity. At the same time, the rubber material is dispersed and uniformly mixed due to shear, thus achieving the purpose of rubber refining. Since the invention of the elliptical rotor enclosed rubber mixer in 1916, the enclosed rubber mixer has rapidly developed in the rubber industry. Later, other forms of enclosed rubber mixing machines with rotors emerged. The compounding cycle of modern enclosed rubber mixers is 2.5-3 minutes, and the maximum capacity of the mixing chamber is 650 liters. 3. Extruder Rubber machinery is used for extruding tread, inner tube, rubber hose, and various rubber strips, as well as for wrapping cable and wire products. A common one is a screw extruder. Its working principle is: the rubber material is stirred, mixed, plasticized, and compressed inside the barrel by the rotation of the extrusion screw, then moved towards the machine head, and finally extruded into a certain shape from the mouth. According to the needs of the product, multiple machines can be used for composite extrusion of various rubber materials. Screw extruders are divided into two types: hot feed and cold feed. Hot feed extruders usually feed strip material that has been preheated by an open compounding machine. The rubber material fed into the cold feed extruder does not undergo heat refining, which eliminates the need for heat refining equipment. 4. Rolling machine Mainly used for gluing or wiping of curtain canvas, pressing, laminating, and embossing of rubber materials. The main working component of a rolling machine is the rollers, and the number of rollers is usually 3 or more. When a rubber material with a certain temperature and plasticity is fed into the gap between opposing rotating rollers, it is subjected to strong compression and extension under the action of friction, forming the desired product. The first rolling machine was manufactured and used in production in 1857, and has since been continuously improved. Especially since the 1950s, the development of the plastic industry has effectively promoted the improvement of high-precision and high-speed rolling machines. In order to obtain uniformly thick rolled products, new rolling machines are generally equipped with roller deflection compensation devices. The thickness of the semi-finished product being rolled is measured using specialized equipment, and some rolling machines are also equipped with an automatic thickness adjustment system controlled by an electronic computer. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

China is a country with a high demand for plastic products. Correspondingly, plastic machinery and equipment must also keep up with the pace. Whether it is food, medicine, or packaging, there is a lot of room for increase in equipment demand. According to industry forecasts, vegetables will soon be heavily packaged in cardboard boxes. With the further development of the economy, the upgrading and transformation speed of cardboard packaging enterprises is accelerating, and there will be an urgent need for various sets of corrugated cardboard and cardboard boxes (boxes) with a width of over 2000mm, including five layers, seven layers, nine layers, and high strength. Corrugated cardboard, box making, and printing equipment: Corrugated cardboard and box making refer to packaging boxes, large cardboard boxes, fast food lunch boxes, disposable paper cups, paper mold packaging, etc. These types of products can be considered the leading players in the packaging industry, with nearly 10000 cardboard box packaging factories nationwide. For more than a decade, the demand for corrugated cardboard, cardboard boxes, and printing equipment in the domestic circulation field has been booming, and the supply is in short supply. In addition to a large number of daily necessities packaged in cardboard boxes, currently, motorcycles and bicycles are also heavily packaged in cardboard boxes. Especially the indispensable fruits in daily life have been packaged in cardboard boxes instead of willow baskets. Pharmaceutical processing and packaging machinery: Various sets of equipment for processing traditional Chinese and Western medicines, especially important modern machinery, are important topics in the industry today. To solve the packaging problems of traditional Chinese medicine slices, slices, injections, ointments, powders, and pills, there is an urgent need for various pharmaceutical processing and packaging equipment, to solve the adaptability, compatibility, and reliability of products, especially high-speed, automated, and multifunctional packaging machinery And corresponding composite packaging materials. Complete equipment for convenient food production: mainly complete equipment for convenient food processing represented by instant noodles, convenient Congee, dumplings, steamed buns and other production machinery, and the demand for its products is growing. According to domestic market research, people's demand for convenient food is in the direction of having nutritional value, high-end products, and good taste. The market prospects for traditional food processing and elderly and baby food processing equipment are also promising, and relevant enterprises should focus on developing them. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

Applicable scope of small internal mixer: rubber products: various rubber rings, rubber tubes, adhesive tapes, rubber belts, shockproof rubber, rubber rollers, rubber sponges, tires, rubber soles, oil seals, and other silicone rubber miscellaneous parts, footwear, sports ball and other industries. Mixing of chemical industry raw materials: various cable materials, color masterbatches, EVA, PVC, carbon black, low smoke and no fontanel materials, TPR, cable heat shrink tubes Mixing of chemical raw materials such as high filling engineering materials with calcium compounds Features of a small internal mixer: The mixing tank of this machine is made of advanced special steel, and the surface is treated with wear-resistant steel. The surface is electroplated with hard chromium, which has excellent wear resistance and a lifespan of 1-2 times longer than traditional ones. The mixing tank is divided into tilting and lifting types, and the mixing shaft adopts a dry mechanical shaft seal to prevent leakage, making cleaning and color changing simple and environmentally friendly Our company's products are as follows: Small open mill: 2 inches, 3 inches, 4 inches, 6 inches, 7 inches, 8 inches, 9 inches, 10 inches, 12 inches, 14 inches, and 16 inches laboratory mixer functions include electric heating, water cooling, oil heating, integrated cooling and heating, automatic rubber flipping machine, rubber mixing machine, plastic mixing machine, and mixer Small internal mixer: 0.05L0.1L0.2L0.3L0.5L1L2L3L5L8L10L15L20L25L35L Internal mixer desktop, pressurized, flipped, open close, clutch, closed, electrically heated water cooled laboratory internal mixer, vacuum internal mixer, metal ceramic powder internal mixer, internal mixer granulator integrated machine Small tablet press: 5T10T20T25T30T50T65T100T150T200T300T single layer, double layer, four column, with safety door, upper layer heating and lower layer water cooling, one layer electric heating and water cooling integrated, electric heating, water cooling, oil heating, hydraulic system, manual, semi-automatic, pneumatic, fully automatic laboratory small tablet press, hot pressing molding machine, rubber and plastic molding machine. Small vulcanizing machine: 5T10T20T25T30T50T65T100T150T200T single layer, double layer, four column, with safety door, electric heating, water cooling, oil heating, hydraulic system, pneumatic, manual, semi-automatic, fully automatic flat vulcanizing machine, vacuum vulcanizing machine. Small extruder: screw diameter 15mm 20mm 25mm 30mm 35mm 40mm 45mm single screw extruder, double screw extruder, rubber extruder, plastic extruder, small granulator and other rubber refining equipment and extrusion equipment, with complete models and can be designed and manufactured according to customer requirements. Contact Mr. Huang for detailed product inquiries.

Since the emergence of internal mixers, a series of advantages have been demonstrated in the mixing process compared to open mixers, such as short mixing time, high production efficiency, easy operation, better overcoming dust flying, reducing loss of admixture, improving labor conditions, and reducing labor intensity. Due to its development largely based on experience, there was a claim in the early stages of development that the efficiency of molding was low and it cannot be used for molding, but it has been denied by production practice. Therefore, the emergence of internal mixer is an important achievement of rubber mixing machinery, and it still remains a typical equipment in plastic and mixing, and is constantly developing and improving. According to foreign data statistics, 88% of rubber materials in the rubber industry are manufactured by internal mixers, and internal mixers are also widely used in the plastic and resin industries. In this intense mixing process, of course, many new problems will arise. Therefore, for mechanical research and design, from the kneading system, cooling system, sealing system, feeding and pressing system, unloading system, transmission system, control system, main components, materials to various technical decisions and theories of parameters, corresponding development is needed to ensure excellent performance of the machine, Provide possible adaptability and regulation for the production process. One of the symbols of the development of modern internal mixer is the high-speed, high-pressure, and high-efficiency machines. Usually, a low-speed mixer with a rotor speed of 20rpm is called a low-speed mixer, a 30-40rpm mixer is called a medium speed mixer, and a speed mixer above 60rpm is called a high-speed mixer. In recent years, there have been internal mixers with speeds up to 80rpm or even higher, as well as dual speed, three speed, and variable speed internal mixers with extensive adaptability and treatment methods to process and efficiency, as well as internal mixers with adjustable rotor speed ratios. Its operating time has been greatly shortened, from 8-15 minutes for slow machines in the past to 1.5-3.5 minutes, and some even reach 1-1.5 minutes (including the process of combining internal mixing and supplementary mixing). The structure of the internal mixer is also constantly developing. The working process of the internal mixer and the mechanization and automation level of the entire unit are also constantly improving, using program control. Nowadays, large imported machines are all controlled by computers. In short, this development is greatly strengthening the mixing process, improving machine efficiency, reducing physical labor, and improving the working environment. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

Mechanical pipeline system of thermal oil heating circulation system: 1. All internal pipelines are made of seamless stainless steel, with uniform heating and minimal pipe damage. 2. Equipped with a pressure relief circuit device and oil shortage alarm to protect the pump and heating pipe. 3. The heating and cooling speed is fast and stable, and the empty machine heats up to 350 ℃ for about 30 minutes. 4. The system adopts a high-temperature circulating oil pump and a high pressure and large flow 350 ℃ hot oil pump, which has good thermal conductivity, fast temperature rise, small temperature difference, and energy saving of over 30%. 5. Using flange type Swedish wire dual power stainless steel tube chrome plated electric heating tube, suitable for different temperature control occasions. Imported electric heating wire has a long service life and is not easy to burn out. 6. Pressure indicator gauge. 7. The solenoid valve adopts Taiwan's original imported Dingqi brand UNID, with high temperature resistance of 380 ℃. 8. The return oil temperature gauge can monitor whether there are any blockages in the temperature control equipment and whether the working conditions are stable. 9. Loss of pressure exhaust protection system to prevent heater dry burning caused by system loss of pressure. 10. The cooler adopts a flange type large area heat exchanger, with fast cooling speed and accurate temperature control. 11. Temperature controlled over temperature anti dry burning device, anti fouling device. Small open mill: 2 inches, 3 inches, 4 inches, 6 inches, 7 inches, 8 inches, 9 inches, 10 inches, 12 inches, 14 inches, and 16 inches laboratory mixer functions include electric heating, water cooling, oil heating, integrated cooling and heating, automatic rubber flipping machine, rubber mixing machine, plastic mixing machine, and mixer Small internal mixer: 0.05L0.1L0.2L0.3L0.5L1L2L3L5L8L10L15L20L25L35L Internal mixer desktop, pressurized, flipped, open close, clutch, closed, electrically heated water cooled laboratory internal mixer, vacuum internal mixer, metal ceramic powder internal mixer, internal mixer granulator integrated machine Small tablet press: 5T10T20T25T30T50T65T100T150T200T300T single layer, double layer, four column, with safety door, upper layer heating and lower layer water cooling, one layer electric heating and water cooling integrated, electric heating, water cooling, oil heating, hydraulic system, manual, semi-automatic, pneumatic, fully automatic laboratory small tablet press, hot pressing molding machine, rubber and plastic molding machine. Small vulcanizing machine: 5T10T20T25T30T50T65T100T150T200T single layer, double layer, four column, with safety door, electric heating, water cooling, oil heating, hydraulic system, pneumatic, manual, semi-automatic, fully automatic flat vulcanizing machine, vacuum vulcanizing machine.

Is it caused by the rubber mixing method that the hardness of the rubber material produced by the open mixer is about 10 degrees lower than that produced by the internal mixer for the same formula? It's a bit of a deal, but not so much, right? 10 degrees? See if there are any other issues. There is a difference between open refining and internal refining, but it won't be that big! Especially for the differences in mixing equipment, mixing methods, and mixing time, there must be differences between the opening mixer and the internal mixer for rubber mixing. The opening mixer takes a long time and the refueling method may lead to low hardness. The difference between first stage refueling and second stage refueling is quite significant~but the difference of 10 degrees is a bit too big! The open mixer is a small open mixer used in experiments. I have never seen it before during internal mixing, and I don't think there should be such a big difference. However, my colleagues tested it with such a big difference. It must be related, mainly due to the degree of mixing! The difference is too big. Check the weighing equipment and eliminate these factors first. If the weighing is not accurate, this situation can sometimes have a misleading effect. Perhaps you waste a lot of filling agent when using the open mixer to mix rubber. Small open mill: 2 inches, 3 inches, 4 inches, 6 inches, 7 inches, 8 inches, 9 inches, 10 inches, 12 inches, 14 inches, and 16 inches laboratory mixer functions include electric heating, water cooling, oil heating, integrated cooling and heating, automatic rubber flipping machine, rubber mixing machine, plastic mixing machine, and mixer Small internal mixer: 0.05L0.1L0.2L0.3L0.5L1L2L3L5L8L10L15L20L25L35L Internal mixer desktop, pressurized, flipped, open close, clutch, closed, electrically heated water cooled laboratory internal mixer, vacuum internal mixer, metal ceramic powder internal mixer, internal mixer granulator integrated machine Small tablet press: 5T10T20T25T30T50T65T100T150T200T300T single layer, double layer, four column, with safety door, upper layer heating and lower layer water cooling, one layer electric heating and water cooling integrated, electric heating, water cooling, oil heating, hydraulic system, manual, semi-automatic, pneumatic, fully automatic laboratory small tablet press, hot pressing molding machine, rubber and plastic molding machine. Small vulcanizing machine: 5T10T20T25T30T50T65T100T150T200T single layer, double layer, four column, with safety door, electric heating, water cooling, oil heating, hydraulic system, pneumatic, manual, semi-automatic, fully automatic flat vulcanizing machine, vacuum vulcanizing machine.

Under normal circumstances, the consumption of a typical internal mixer is approximately 0.8%. According to the fact that there are no specific national requirements and standards in this regard, the consumption of sealed internal mixers will be less, and the consumption of poorly sealed internal mixers will be more. If the carbon black in the rubber blend is large particles, the loss will also be reduced, and if the carbon black is in powder form, the loss will also be significant. We should conduct specific operations and analysis, and the registration usually ranges from 0, 5 to 0.8. Material loss is related to the discharge temperature, as well as the type of raw rubber and raw materials; Under high temperature conditions, natural rubber will release low molecular weight carboxyl, #, and water; White carbon black also releases some moisture; The total loss will not exceed 1.5% Small open mill: 2 inches, 3 inches, 4 inches, 6 inches, 7 inches, 8 inches, 9 inches, 10 inches, 12 inches, 14 inches, and 16 inches laboratory mixer functions include electric heating, water cooling, oil heating, integrated cooling and heating, automatic rubber flipping machine, rubber mixing machine, plastic mixing machine, and mixer Small internal mixer: 0.05L0.1L0.2L0.3L0.5L1L2L3L5L8L10L15L20L25L35L Internal mixer desktop, pressurized, flipped, open close, clutch, closed, electrically heated water cooled laboratory internal mixer, vacuum internal mixer, metal ceramic powder internal mixer, internal mixer granulator integrated machine Small tablet press: 5T10T20T25T30T50T65T100T150T200T300T single layer, double layer, four column, with safety door, upper layer heating and lower layer water cooling, one layer electric heating and water cooling integrated, electric heating, water cooling, oil heating, hydraulic system, manual, semi-automatic, pneumatic, fully automatic laboratory small tablet press, hot pressing molding machine, rubber and plastic molding machine. Small vulcanizing machine: 5T10T20T25T30T50T65T100T150T200T single layer, double layer, four column, with safety door, electric heating, water cooling, oil heating, hydraulic system, pneumatic, manual, semi-automatic, fully automatic flat vulcanizing machine, vacuum vulcanizing machine.

There are many production enterprises in the plastic machinery (small internal mixer) industry in China, and most of them have seriously deviated from the economic scale. The production equipment is outdated, and the situation of difficult technological progress is still quite serious. However, some enterprises have grasped the market demand and technological development trends, seized market opportunities through effective technological transformation, and developed into backbone enterprises with initial economic scale. The product sales of enterprises with the top economic indicators account for about twice the total sales of plastic machinery in China. Up to now, China's plastic machinery products have consistently ranked first in the world in terms of production of small and medium-sized products. Injection molding machines provide advanced rubber injection molding machines in the high-tech plastic machine market. In the new century, the discipline of polymer materials and chemical synthesis processes will continue to develop at a high speed, especially with the solution of plastic degradation technology and environmental protection issues, the application field of plastic products will continue to expand. Therefore, the demand for plastic machinery in the international market will continue to grow. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

Rubber edge remover is a liquid nitrogen free automatic edge remover for rubber, silicone, fluorine rubber, plastic and other products. At present, in addition to manual edge trimming, there are several automatic edge trimming methods in the industry for molded rubber products: One of the biggest problems is the lack of versatility in punching and cutting burrs. Each set of mold products requires a pair of punching knives, which are high in cost and long in delivery time, making them suitable for long-term production and large order products. The second is the freezing method, which is based on the principle that rubber becomes hard and brittle at low temperatures, and the degree of brittleness varies depending on the thickness. That is to say, under the same low-temperature conditions, the thin part becomes brittle before the thick part. So, using the brittle gradient caused by the thickness difference between the overflow edge and the body to complete the trimming, that is, grasping the time difference between the overflow edge being brittle and the body not being brittle, and applying external forces such as friction, impact, and vibration to the repaired product to remove the overflow edge. The third is the centrifugal edge trimming machine, which cleverly utilizes the principles of aerodynamics to achieve automatic edge removal. Due to the fact that the finished vulcanizate has not undergone the vitrification process of freezing, the process of tearing and separating burrs is similar to manual operations, starting from weak gaps and gradually expanding the cracks, thus achieving the goal of separating burrs. The introduction of small internal mixers in rubber machinery can be found on this website to identify key points. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

The rapid development of the rubber industry has gone forever. Since 2012, the development of the rubber industry has gradually entered a stage of slowing down growth, presenting a new trend and characteristics of normalized development. In the future, the rubber industry should actively reflect on the direction and ideas of development mode transformation, structural adjustment, and reform and innovation under the "new normal", and make corresponding adjustments to adapt to the changes in the business development environment brought about by the "new normal". According to relevant data, in 2012, the two values of the tire industry (industry output value and sales revenue growth rate) dropped sharply from 16.97% and 17.5% in 2011 to 0.01% and 1.89%; In 2013, it was 3.8% and 2.13%; In the first eight months of 2014, the growth rates were 3.37% and 0.09%, a decrease of 1.52 and 2.22 percentage points compared to the first quarter, and a decrease of 1.06 and 1.65 percentage points compared to the same period last year. The production of tires is close to 300 million, a year-on-year increase of 11.3%; The industry's profit increased by 7.95%, with a 15 percentage point decrease in growth rate. The tire profit increased by 3.8%, with a year-on-year decrease of 26.6 percentage points. Industry analysts from Shangpu Consulting pointed out that the "new normal" of the rubber industry is manifested in four aspects: firstly, the industry's economic growth rate has begun to shift from a high-speed growth rate of about 20% to a single digit growth rate of about 5% for nearly three years; Secondly, structural adjustment has become the primary task of industry development, adjusting product structure, raw material structure, and market structure, continuously optimizing and upgrading; Thirdly, the driving force for development will shift from factor driven and investment driven to innovation driven, shifting from quantity growth to quality improvement, service growth, and "green" growth; The fourth is that some problems that were previously covered up by high-speed growth will be concentrated and exposed during this period, and some uncertain risks will become apparent. Development will face new challenges and opportunities. Behind the increase in quantity and the decrease in price is the collision between the changes in the industry's development environment and conditions, and the contradictions accumulated by the industry's rapid growth over the years. At present, the domestic and foreign economies have entered a period of deep adjustment, with weak demand in the product market, low fluctuations in rubber raw material prices, increased uncertainty, and increased costs of various factors. Various rubber products such as tires have prominent structural surplus contradictions, severe homogenization competition, and various forms of price wars. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

Rubber and plastic are indispensable polymer materials in the modern national economy and technology fields, with a wide range of applications. They can not only meet the needs of people's daily life, medical and health care, cultural and sports life, but also meet the technical requirements of various fields such as industrial and agricultural production, transportation, electronic communication, and aerospace. Rubber and plastic can be used to produce products with working temperatures ranging from -100 to 350 ℃, deep vacuum and ultra-high pressure conditions, corrosion-resistant media, radiation resistance, UV and ozone resistance, flame retardancy and insulation, noise reduction and shock absorption, insulation and conductivity, dynamic fatigue resistance, magnetic and biological functions, and other requirements. They can replace metals such as steel, wood, glass, and ceramics, but cannot be replaced by other materials. It plays a decisive role in the development of the national economy and modern high-tech fields. The development of the rubber and plastic industries determines and reflects the overall development level of the national economy and modern high-tech fields. Rubber and plastic are widely used in the manufacturing of various daily necessities, such as raincoats, rainshoes, umbrellas, rubber shoes, sandals, slippers, and plastic containers; Various medical hoses and stoppers, plastic medicine bottles and packaging materials, disposable plastic infusion tubes and syringes, blood transfusion hoses, human rubber organs and prosthetic accessories, etc. Various rubber or plastic accessories and protective and decorative materials for aircraft, ships, locomotives, and automobiles must also be manufactured using specialized rubber and plastic. For example, large ships require tens of thousands of rubber products, heavy aircraft also require tens of thousands of rubber accessories, and automobiles require various rubber hoses, belts, and oil and heat resistant sealing accessories. The proportion of plastic used in cars is increasing year by year, and it is expected to reach 20% of the mass of car bodies by the end of the 20th century, such as plastic fuel tanks, car floor panels, seats, steering wheels, interior decorative panels, bumpers, etc; New cars and even the overall body shell are made of engineering plastics and fiber composite materials. The development of the automotive industry and various transportation industries cannot do without rubber, plastics, and other polymer materials. Various special rubber and plastic accessories, as well as protective, sealing, and bonding materials, must be used in the military, aviation, and aerospace industries. Some belong to high-performance, multifunctional materials and products. The rubber and plastic industry is of great significance for reducing mass, improving speed, and saving fuel. Without it, various departments and high-tech fields of the modern national economy cannot survive, let alone develop. On the contrary, it is precisely the development needs of these fields that have promoted the rapid development of the rubber and plastic industry. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

External factors: weakened tire investment support, suspension or cancellation of orders The meridianization rate of Chinese tires exceeds 89%, and there is little room for improvement compared to the world average meridianization rate of tires. Li Dongping, Honorary Chairman of the Rubber Machinery Professional Committee of the China Chemical Equipment Association, stated that in the past, tire investment was driven by both the growth of tire demand and tire meridianization. Now, it can only be supported by the growth of tire demand on one leg, making it difficult for the tire industry to reproduce high-speed development. The era when equipment orders drove the rapid development of the rubber machinery industry in the past is no longer returning, and relying on conventional rubber machinery orders is difficult to survive, let alone develop. After years of rapid development, the Chinese tire industry has experienced a severe structural surplus of products, and the industry has entered an era of meager profits. In June, the United States announced a "dual anti" investigation into Chinese tires, adding to the operational environment of the tire industry. Chinese tire companies have to stop or reduce tire investment, resulting in a cliff like decline in rubber machinery orders. After July, new orders for rubber machinery in China are very limited, less than the usual 20%. Even worse is the suspension or cancellation of orders that have been executed in the first half of the year, and the delayed delivery of orders being organized by rubber machinery enterprises, which has trapped their funds in the backlog of products. Multiple companies in the industry have factories full of products waiting to be shipped, and some companies have difficulty transferring funds. At present, rubber prices are at a historical low, and tire prices are still on a bearish path of bottoming out. Tire inventory has increased by more than 30% year-on-year, reaching a historical high. In this situation, the enthusiasm for tire investment has decreased, and it is natural for rubber machinery orders to decrease. The tire factory itself is facing difficulties in operation, and the rubber machinery industry will face even more difficulties in collecting payments. Internal cause: Clearly entering the buyer's market, "internal competition" often leads to price wars After years of rapid development, especially the recent rapid expansion of production capacity, the structural surplus of rubber machinery in China is very obvious, that is, there is a serious surplus of popular rubber machinery products, but there is still a gap in demand for high-end rubber machinery. In recent years, due to the good order situation of rubber machinery, some other industry manufacturers such as mold enterprises have entered the rubber machinery field, and the production capacity of rubber machinery has rapidly increased, entering a clear buyer's market. Taking tire vulcanizers as an example, under normal circumstances, China's annual demand for tire vulcanizers is around 2500 units, but currently China's annual production capacity reaches over 4000 units. The severe product surplus has led to numerous bidding participants and intense competition. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

The function of an internal mixer is to heat the mixed powder or return material, and continuously roll and press the two rotors to achieve gelation. The workflow of this equipment is to first mix the added raw materials, process the raw materials, unload them, and then load them after a period of time. The motor only works from the time of loading to the time of unloading. The motor does not work after unloading and before the next loading, while the motor runs continuously throughout the entire process. The motor wastes a large amount of electrical energy after unloading and before the next loading. Frequency conversion energy-saving transformation plan: By controlling the motor through a frequency converter, the motor runs at full speed of 50HZ during processing. When not processing, the frequency of the frequency converter is reduced to operate at 35HZ (the operating frequency can be customized), reducing the speed of the motor and achieving energy-saving goals. In order to achieve simple operation after energy-saving transformation of the equipment, the following control method is adopted: the motor current will increase due to the increase of load after feeding, and the load will decrease during standby, and the current will decrease (maintained within the range of no-load current). By utilizing this feature, the current detection function of the frequency converter itself is used to determine the speed of the frequency converter. Terminate the A1V terminal and AI2 terminal of the frequency converter, and the A1V terminal function is to simulate the output current signal of the frequency converter (0-10V corresponds to 0-rated current value). Through on-site observation, the current of the frequency converter at no load is 200A, and the A1V output is 4V (which can be adjusted according to the on-site situation). The current after feeding is greater than 200A. At this point, it is only necessary to set the corresponding output frequency of 35HZ when the AI2 terminal voltage is 0-4V (the lower limit frequency can be set to 35HZ). When the AI2 terminal voltage is 4-10V, the output frequency is basically 50HZ. AIV determines the size of the analog output signal based on the load current. AI2 controls the input frequency of the frequency converter based on the change of the A1V analog output signal, thereby achieving the goal of changing the motor speed. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

The global economic growth has slowed down, and the packaging machinery industry has also been affected by the pressure of slower economic growth. The profit margin has decreased compared to the same period last year, and the global packaging machinery industry has shrunk in scale. At the same time, the significant increase in raw material prices and the increase in labor base have led to a significant increase in production costs for packaging machinery industry enterprises, and have become the last straw that has crushed the packaging machinery industry, becoming an unbearable burden for related enterprises in the packaging machinery industry. On the other hand, automated and intelligent devices are widely used, and the packaging industry is no exception. Intelligence has become a key focus in the packaging industry With the development of technology, intelligence has become the blue ocean of market development. As a sunrise industry, any industry that is closely related to intelligence has achieved huge profits. With a high incidence of food safety incidents, intelligent packaging has also become a key focus of the packaging industry's development. The special properties of these packaging can precisely meet the special requirements and environmental conditions of food packaging. At present, the domestic food safety situation is very severe and has reached an urgent level. Therefore, we urgently need to improve intelligence in packaging and maximize the use of various means to ensure food safety. Intelligent packaging is a powerful measure to ensure food safety and urgently needs to be developed. In China, the research and development of intelligent packaging and its application in various fields are still in its infancy. But he also pointed out that from another perspective, although China's application of intelligent packaging still lags behind developed countries, there is broad profit space waiting to be explored in China's intelligent packaging market. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

ABS: Commonly known as engineering plastic, it can be used for connectors, seat backs, and seat panels. It is the main raw material in plastic that can be electroplated (water plated). PP: Commonly known as polypropylene, used for five-star feet, armrests, foot pads, and connectors with low strength requirements. Disadvantages: Poor wear resistance and low surface hardness. PVC: Commonly known as polyvinyl chloride, mainly used for edge sealing and insertion conditions. It is suitable for extrusion molding, and PVC material is a non combustible material in plastic parts, which has poor temperature stability during processing and molding, especially in terms of color stability. PU: Commonly known as polyurethane. Mainly used for armrest (foam) accessories. POM: Commonly known as Saigang. Mainly used for wear-resistant parts such as foot mats, casters, door hinges, hinges, etc. Performance is wear-resistant, pressure resistant, but dimensional stability is poor. PA: Commonly known as nylon. Mainly used as foot pads, five-star claws, casters, and other wear-resistant and high service life requirements. Features: Wear resistant, pressure resistant, high strength, long indoor service life. Some models, such as PA66, can withstand high temperatures up to 2200. The disadvantages are that it is easy to change performance, break, and have poor weather resistance when exposed to the sun. PMMA: Organic glass (commonly known as acrylic). There are five transparent materials in plastic, and PMMA is one of them with the highest transparency. When cutting the workpiece, it has a sour taste and is easy to deform during processing. Soaking it in boiling water can shape and bend it. Disadvantages: The surface is easy to scratch, the hardness is low, and it is easy to crack when bent. The price is more than 20% higher than ABS. PC: Commonly known as polycarbonate. This variety is also a transparent material with high surface hardness, scratch resistance, strong impact resistance, high strength, and good weather resistance (i.e., it is not afraid of sunlight). The screen partition and sunlight board in furniture are hollow extruded from this material. Features: High price and cost, about 40% higher than PMMA. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

The poor performance of the adhesive parts is as follows: water lines; Air pattern. The effect after electroplating is that it is still clearly visible after electroplating, as the electroplating itself has a thin coating (2-30um), which is difficult to achieve solely by electroplating coverage. The manifestation of defective rubber parts is batch peak. The effect after electroplating is that the electroplating layer still accumulates, which can easily cause scratches and affect assembly. The poor performance of the adhesive part is: adhesive excrement. The effect after electroplating is that it still cannot be covered, affecting the appearance. The poor performance of the adhesive parts is as follows: embossing/blistering. The effect after electroplating is: foaming after electroplating. The poor performance of the adhesive parts is as follows: adhesive wire/plastic shavings. The effect of electroplating is that it forms metal chips after electroplating, which affects assembly and easily damages the electroplating bath solution. The poor performance of the rubber parts is as follows: bruises/scratches. The effect after electroplating is that it becomes more pronounced and affects the appearance. The poor performance of the adhesive is manifested as impurities. The effect of electroplating is that it can cause sand particles, blistering, and leakage, affecting the appearance. The poor performance of the adhesive is manifested as shrinkage holes. The effect after electroplating is that it is easy to hide the electroplating solution, which affects the composition of the electroplating cylinder fluid and leads to missed plating of the workpiece. The manifestation of defective adhesive parts is the use of release agents. The effect after electroplating is that it is easy to cause plating leakage, and the bonding force of the plated parts is poor, with oil stains. The poor performance of the adhesive part is manifested as excessive material at the nozzle. The effect after electroplating is that it is easy to cause pitting, and the plated parts may miss plating, resulting in poor adhesion. The maximum amount of nozzle material should not exceed 30%. The poor performance of the adhesive parts is manifested as mold printing, spark marks, and drag marks. The effect after electroplating is that it becomes more pronounced and affects the appearance. Matte corrosion lines of electroplated parts: The thickness of surface corrosion lines should be consistent, especially for semi gloss chromium products. If the corrosion lines are fine, there will be no matte effect. Setting of hanging positions for electroplated parts: Without appropriate hanging positions, it is easy to cause deformation, and poor connection between parts and water nozzles can cause poor current flow, resulting in yellowing and plating leakage. The material composition of electroplated parts: Electroplated grade ABS is the best, or ordinary ABS can be used. The ingredients should be brand new, and no color powder should be added. Packaging method for electroplated parts: The preferred method is to use a single blister box for packaging, followed by a single set of PE bags. Large items should be wrapped with inner cotton sheets and outer bubble bags. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

At present, the packaging industry is the most widely used industry for plastic products, including various packaging films such as cling films, printing substrate films, heat shrink films, barrier films, as well as various packaging containers such as yogurt bottles and food cans. Due to the direct impact of food on consumer health, there are also high requirements for packaging materials. In addition to basic characteristics such as breathability, moisture resistance, oil resistance, puncture resistance, and high transparency, high barrier properties are also required for volatile substances (such as the aroma of food), oil resistance on the inner layer, convenient printing on the outer layer, and high heat sealing strength. According to the production process of plastic products, plastic machinery can be divided into four categories: plastic mixing machinery, plastic forming machinery, plastic secondary processing machinery, and plastic processing auxiliary machinery or devices. Plastic mixing machinery is used for the manufacturing of various forms of plastic mixing materials, including kneading machines, plasticizers (open and internal mixers), pelletizers, screening machines, crushers, and grinders. Plastic molding machinery, also known as plastic one-time processing machinery, is used for the molding of plastic semi-finished products or products, including compression molding machines, injection molding machines, extrusion machines, blow molding machines, rolling machines, foaming machines, etc. Plastic secondary processing machinery is used for the reprocessing and post-processing of plastic semi-finished products or products, including hot forming machines, welding machines, heat sealing machines, hot stamping machines, vacuum evaporation machines, flocking machines, printing machines, etc. Metal processing machines are also commonly used for plastic secondary processing. Plastic processing auxiliary machinery or devices are used to rationalize the plastic processing process, including automatic measuring and feeding devices, automatic recovery devices for leftover materials, automatic extraction devices for injection molded products, rapid replacement devices for injection molded parts, cooling machines for injection molded parts, automatic thickness measurement devices, and raw material transportation and storage equipment. This type of auxiliary machinery or device has become an indispensable part of modern plastic processing automation.

1: Firstly, start the lubricating oil pumps and hydraulic stations of the internal mixer and check if the oil supply to each part is normal. After the oil pump and hydraulic station work normally for 15 minutes, start the main motor and observe whether the rotor rotation is correct from the outlet end of the mixing chamber. Usually, before leaving the factory, the internal mixer is idle for more than 2 hours and idle for more than 4 hours at the user's location. 2: Open the cooling water system of the mixer and check for any leaks. 3: In both manual and automatic operation states, the weight, feeding door, and unloading door should be opened multiple times, and the action should be flexible and reliable. 4: During the empty running test of the internal mixer, check the following items: a: The lubrication of the transmission gears and bearings of the reducer is sufficient, and the sealing parts are well sealed. b: There should be no significant vibration or periodic noise during operation. c: When idling, the main motor is at a single speed and its power consumption should be less than 15% of the rated power d: The temperature of bearings in various parts of the internal mixer should not suddenly rise, and the temperature rise of rotor bearings and reducer bearings should be ≤ 20 ℃ Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

One of the symbols of the development of modern internal mixer is the high-speed, high-pressure, and high-efficiency machines. Usually, a low-speed mixer with a rotor speed of 20rpm is called a low-speed mixer, a 30-40rpm mixer is called a medium speed mixer, and a speed mixer above 60rpm is called a high-speed mixer. There have been internal mixers with speeds up to 80rpm or even higher, as well as dual speed, three speed, and variable speed internal mixers with extensive adaptability and treatment methods for process and efficiency, as well as internal mixers with adjustable rotor speed ratios. Its operating time has been greatly shortened, from 8-15 minutes for slow machines in the past to 1.5-3.5 minutes, and some even reach 1-1.5 minutes (including the process of combining internal mixing and supplementary mixing). The structure of the internal mixer is also constantly developing. The working process of the internal mixer and the mechanization and automation level of the entire unit are also constantly improving, using program control. Currently, computer control is used in large imported machines. In short, this development is greatly strengthening the mixing process, improving machine efficiency, reducing physical labor, and improving the working environment. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.

The internal mixer, abbreviated as "LiNa machine" and fully known as "sealed rubber mixer", was developed on the basis of the open mixer. After the invention of the open mill in 1820, the rubber industry underwent a fundamental transformation. However, due to the many shortcomings of the open mill, such as high labor intensity, low efficiency, and high dust, it seriously affected human health. Therefore, people began to consider whether this processing equipment could be covered with a cover, and gradually developed into an internal mixer. Because it works in the mixing room, it is called a closed type. Due to the open operation of the opening mixer, it is called an open rubber mixer. It is generally believed that the internal mixer was invented by Banbury in 1916. In fact, it was first designed by a commercial engineer (British) from West Germany based on the company's prototype machine. Due to its rapid development, large production capacity, and wide application, people have always believed that the Banbury internal mixer was the earliest to be introduced. Since the emergence of internal mixers, a series of advantages have been demonstrated in the mixing process compared to open mixers, such as short mixing time, high production efficiency, easy operation, better overcoming dust flying, reducing loss of admixture, improving labor conditions, and reducing labor intensity. Due to its development largely based on experience, there was a belief in the early stages of development that the efficiency of molding was low and it could not be used for molding, but it has been denied by production practice. Therefore, the emergence of internal mixer is an important achievement of rubber mixing machinery, and it still remains a typical equipment in plastic and mixing, and is constantly developing and improving. According to foreign data statistics, 88% of rubber materials in the rubber industry are manufactured by internal mixers, and internal mixers are also widely used in the plastic and resin industries. Due to the continuous improvement of the metal powder industry, some can also be mixed using internal mixers. Dongguan Zhenggong Electromechanical Equipment Technology Co., Ltd. was founded in 1988 in Dongguan, Guangdong. Its main products Small open mill, Small internal mixer, Small tablet press, small vulcanization machine, Small extruder, and various customized laboratory mixer rubber and plastic mechanical equipment. Established the Taiwan Joint Venture Business License in 2009, after more than 30 years of research and development and creation. It has been located in Houjie Town, Dongguan City, Chinese Mainland Province, mainland China.