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  • 18 2021-10
    What Are the Main Jobs of Extrusion Granulator
    Extrusion: The dry raw material becomes cake-like under the double-roll extrusion effect of the extrusion granulator. At this time, the relative density of the raw material is very large, and the intermolecular gap is not too large. It is not easy to store the output later. The settled gas is wet and cold. In this whole process, the basic elements of intermolecular interaction in physics are also used, allowing the squeezed molecules to fuse at will into molecules with a moderate relative density in the interior space design plan. Granulation: The crushed cake-like raw materials are crushed by the extrusion granulator and divided into countless small particles to ensure the purpose of granulation. After rigorous extrusion and granulation, the raw material usage rate of the extrusion gr
  • 12 2021-10
    Rubber Extruder Temperature Setting
    The rubber extruder needs to raise the temperature of the equipment before producing the product. When the temperature rises to the temperature we need,the equipment can be operated and at the same time the rubber extruder's feeding system can be filled with rubber. After the rubber enters the screw barrel through the feeding system, it will be heated and plasticized,and the screw will perform a series of processing such as shearing, compression,and mixing. Then the product shape we need will be extruded at the die of the rubber extruder. During the continuous operation of the equipment,the continuous interaction between the rubber and the screw barrel leads to the continuous pressure extrusion of the equipment to generate self-produced temperature. The temperature will get higher and higher with the operation of the equipment, and if the temperature of the rubber in the extruder barrel is too high,it will cause the rubber to become severely rocked and even scorch in the barrel. Therefore,when we produce rubber products,we must control the temperature of the screw barrel of the rubber extruder within a certain constant temperature range.
  • 08 2021-10
    About Rubber Extruder
    Is used to manufacture tires and other rubber products of machinery, including general rubber machinery, tire machinery and other rubber products of machinery three categories. General rubber machinery is the preparation of rubber material or semi-finished machinery, including raw material processing machinery, rubber mixer, extruder, calender, curtain canvas pretreatment device and cutting machine, etc. The rubber mixer is divided into two categories: open and closed. Open rubber mixer is mainly used for rubber smelting, pressing, rubber breaking, plasticizing and mixing, etc. Open rubber mixer began to be used in production in 1826, its structure is relatively simple, modern is still widely used; The closed rubber mixer is mainly used for rubber plasticizing and mixing. It has one more mixing room than the open rubber mixer. Since the invention of oval rotor closed rubber mixer in 1916, the closed rubber mixer has developed rapidly in the rubber industry, and then other forms of rotor closed rubber mixer. Modern closed mixers have a mixing cycle of 2.5 ~ 3 minutes and a maximum capacity of 650 litres.
  • 28 2021-09
    Classification of Sheet Extruders
    The classification of sheet extruders is as follows: According to the number of screws, it can be divided into single and twin-screw extruders; according to whether venting can be divided into venting and non-venting extruders; according to the position of the screw can be divided into vertical and horizontal extruders. Sheet extruder is generally composed of extruder, die, die, auxiliary machine and other parts. The extruder consists of basic equipment (screw and barrel), transmission and heating and cooling. Extrusion molding has the following advantages: the processing process is continuous, the production efficiency is high, and the application coverage is wide. It can produce pipe fittings, bars, board cables, PVC profiles, etc.; small investment, fast acquisition. Sheet extruders exist as the key machinery and equipment for the production and processing of polymers. In many countries and in my country's mechanical engineering, they have become a series of generalized and standardized machinery and equipment products. The main business of our company are: full tilt free poker, Two Roll Mill, Rubber Internal Mixer, Plastic Granulator, Rubber Open Mill, Extrusion Pelletizer, etc. Please feel free to contact us for more details.
  • 24 2021-09
    Composition of Sheet Extruder
    The sheet extruder is the main engine of the extrusion molding production line. Its function is to plasticize, transport raw materials and provide the pressure required for the product. Extrusion molding has the following advantages: the processing process is continuous, the production efficiency is high, and the application coverage is wide. It can produce pipe fittings, bars, board cables, PVC profiles, etc.; small investment, fast acquisition. Sheet extruders exist as the key machinery and equipment for the production and processing of polymers. In many countries and in my country's mechanical engineering, they have become a series of generalized and standardized machinery and equipment products. There are many types, their application categories, and performance parameters are expressed by relevant main parameters. The main business of our company are: full tilt free poker, Two Roll Mill, Rubber Internal Mixer, Plastic Granulator, Rubber Open Mill, Extrusion Pelletizer, etc. Please feel free to contact us for more details.
  • 15 2021-09
    Production Process of Rubber Extrusion Equipment
    Before the production of rubber products, the rubber must be mixed and smelted. After the rubber is processed, the rubber extruder can be used for extrusion molding. Before we produce rubber products, we must first raise the temperature of the extruder barrel and screw. When the temperature of the equipment rises to the temperature we need, the equipment can be started and filled with rubber through the rubber feeding seat. After the rubber is heated in the barrel, its flowability will increase, so that the rubber will be in a viscous state in the barrel. With the rotation of the extruder screw, the screw thread will compress and mix the rubber. In the whole production process, the rubber will produce self-produced temperature, and the temperature of the barrel needs to be constant within a certain range during production to make the product uniform and stable during extrusion. Therefore, during production, except before production, we cool the screw barrel and screw, and in the subsequent production, we need to use a cooling system to cool the screw barrel and screw. The rubber extruder only plays the role of extrusion molding in the process of rubber products. After the production is completed, most rubber products need to be vulcanized with vulcanization equipment before they can finally become the products we need. For example, when the rubber sealing strip is produced, a hot air vulcanizing box is needed for vulcanization. The main business of our company are: full tilt free poker, Two Roll Mill, Rubber Internal Mixer, Plastic Granulator, Rubber Open Mill, Extrusion Pelletizer, etc. Please feel free to contact us for more details.
  • 08 2021-09
    Maintenance of Extrusion Die
    1. Improper operation or improper handling during the entire maintenance and disassembly process is one of the main causes of damage to the grinding tool. Therefore, the disassembly and removal of the grinding tool should be carried out by a technician. 2. When disassembling, assembling and disassembling material pipes, copper components should be used. 3. Use fine grinding stone or metallographic sandpaper to remove the connecting surface of the material pipe. 4. Before installation, polish and polish the flow channel with metallographic sandpaper to make the surface roughness low, and coat vapor-phase silicone ester to conveniently reduce water vapor and water erosion, and keep the flow channel unobstructed during long-term storage. . 5. During the entire process of installation, all anchor bolts, bearing surfaces and external threads need to be coated with high temperature grease. 6. When disassembling and assembling the fixed mold, attention should be paid to prevent impact; when installing, it should be arranged in accordance with the serial number of the template. 7. In the usual maintenance, the storage tank should be equipped with setting blocks on all sides, leaving a space for moderate adjustment of the indoor space of the theme activity. The main business of our company are: full tilt free poker, Two Roll Mill, Rubber Internal Mixer, Plastic Granulator, Rubber Open Mill, Extrusion Pelletizer, etc. P
  • 26 2021-08
    The Role of Rubber Extruder
    The rubber extruder only plays the role of extrusion molding in the process of producing rubber products. After the production is completed, most rubber products need to be vulcanized with vulcanization equipment to finally become the products we need. For example, when the rubber sealing strip is produced, a hot air vulcanizing box is needed for vulcanization. Before the production of rubber products, the rubber must be mixed and smelted. After the rubber is processed, the rubber extruder can be used for extrusion molding. Before we produce rubber products, we must first raise the temperature of the extruder barrel and screw. When the temperature of the equipment rises to the temperature we need, the equipment can be started and filled with rubber through the rubber feeding seat. The main business of our company are: full tilt free poker, Two Roll Mill, Rubber Internal Mixer, Plastic Granulator, Rubber Open Mill, Extrusion Pelletizer, etc. Please feel free to contact us for more details.
  • 11 2021-08
    Heating and Cooling of Rubber in Equipment
    After the rubber is heated in the barrel, its flowability will increase, so that the rubber will be in a viscous state in the barrel. With the rotation of the extruder screw, the screw thread will compress and mix the rubber. During the entire production process, the rubber will produce its own temperature, and the temperature of the barrel needs to be constant within a certain range during production to make the product uniform and stable during extrusion. Therefore, during production, except before production, we cool the screw barrel and screw, and in the subsequent production, we need to use a cooling system to cool the screw barrel and screw. The main business of our company are: full tilt free poker, Two Roll Mill, Rubber Internal Mixer, Plastic Granulator, Rubber Open Mill, Extrusion Pelletizer, etc. Please feel free to contact us for more details.
  • 04 2021-06
    Working Process of Rubber Extruder
    Before the production of rubber products, the rubber must be mixed and smelted. After the rubber is processed, the rubber extruder can be used for extrusion molding. Before we produce rubber products, we must first raise the temperature of the extruder barrel and screw. When the temperature of the equipment rises to the temperature we need, the equipment can be started and filled with rubber through the rubber feeding seat. After the rubber is heated in the barrel, its flowability will increase, so that the rubber will be in a viscous state in the barrel. With the rotation of the extruder screw, the screw thread will compress and mix the rubber. The main business of our company are: full tilt free poker, Two Roll Mill, Rubber Internal Mixer, Plastic Granulator, Rubber Open Mill, Extrusion Pelletizer, etc. Please feel free to contact us for more details.
  • 27 2020-02
    Corona Virus Outbreak Worsens Tire and Rubber Companies
    At present, in the communication with enterprises, TireWorld.com has learned that the recent outbreak of new crown pneumonia has greatly affected the production and capital chain of rubber and tire companies. Some of these companies may go bankrupt because of the outbreak. Increased production difficulties and pressure on capital chain After the outbreak, many rubber and tire companies soon felt great pressure. According to Tire World, many companies, especially SMEs, are facing the following problems. First, during the postponement of resumption of work and the isolation of foreign employees, companies still had to pay a number of fixed expenses, including rent and interest on loans. Second, during the postponed resumption period, will the company pay employees? Local standards vary, and some of them require companies to pay their own wages. Third, patients with new coronary pneumonia and suspected patients are taken measures such as isolation treatment, isolation observation, etc., and employees who cannot work normally should also be paid. The above-mentioned circumstances have led to the tension of some private rubber and tire companies' capital chains. At the same time, the epidemic also brought additional labor costs, coupled with delays in resumption of work and delays in order delivery, and the cost of protection for the resumption of production during the epidemic prevention and control period increased significantly. These difficulties make matters worse for companies that are already in trouble. In this case, once the capital chain breaks, some companies may face bankruptcy. Downstream automotive market demand shrinks While their own production is in crisis, tire and rubber companies have encountered another big problem. Its
  • 27 2020-02
    Japan Synthetic Rubber Company's Performance Fell Overall
    Recently, Japan Synthetic Rubber Corporation (JSR) released statistical data. In the first three quarters of fiscal 2019, the company realized sales revenue of 359.076 billion yen, a decrease of 4.6% over the same period of the previous fiscal year; operating profit of 29.624 billion yen, a decrease of 21.9% year-on-year. ; Net profit was 18.946 billion yen, a year-on-year decrease of 31.7%. Data show that JSR performance has declined across the board. Among the various businesses of JSR, the sales revenue of elastomer business was 136.468 billion yen, a decrease of 10.1% year-on-year; operating profit was 961 million yen, a decrease of 87.1% year-on-year; the sales volume was 465,700 tons, a decrease of 4% year-on-year. Although the company's sBR sales increased by 10%, sales of products other than SSBR decreased by 7% due to the sluggish global automotive and tire markets. Among them, automobile rubber decreased by 10% year-on-year. Analysts said that the decline in sales, coupled with lower raw material prices, led to lower sales prices and affected operating profit growth. The company forecasts for the full fiscal year ending March 2020, with sales revenue of approximately 483 billion yen, a 2.8% decrease from the previous fiscal year; operating profit of 40 billion yen, a decrease of 7.0% year-on-year; and a net profit of 28 billion yen. A year-on-year decrease of 10.0%. This is roughly the same as the value revised in October 2019. Among them, elastomer business sales revenue was 185.5 billion yen and operating profit was 3 billion yen. However, the company's director and managing director Hideki Miyazaki pointed out that due to the lower-than-expected price of butadiene, the situation of operating income of 3 billion yen was severe. Sales of SSBR are expected to continue to grow, and the company's production facilities in Thailand will operate at full capacity. The Hungarian production site is currently providing s
  • 27 2020-02
    Impact of Japan and South Korea Public Health Events on China's Special Synthetic Rubber
    Japan and South Korea are the main import source countries of China's special rubber. The public health incidents in the two countries have also been greatly affected by rubber market players. Zhuochuang Information Specialty Synthetic Rubber analyst team will conduct analysis on related issues. Japan and South Korea Special Synthetic Rubber Plant Capacity Distribution Statistics According to Zhuochuang statistics, the annual production capacity of special synthetic rubber equipment in Japan and South Korea totals 853,000 tons, of which 518,000 tons are ethylene-propylene rubber equipment, 98,000 tons are butyl rubber, and 237,000 tons are nitrile rubber. Analysis of China's Special Synthetic Rubber Imports from Japan and South Korea Take 2019 imports as an example for statistical analysis. China has implemented anti-dumping policies on the imports of butyl rubber and nitrile rubber, and anti-dumping investigations are being conducted on the imports of EPDM rubber. Butyl rubber imports from Japan and South Korea account for a relatively small amount, but due to the impact of anti-dumping of halogenated butyl rubber, Japan's imports in countries not affected by anti-dumping in 2019 will increase compared with the previous. In terms of nitrile rubber, Japan and South Korea are the countries involved in the anti-dumping of nitrile rubber, but Japan and South Korea are still among the top three countries in the country of import of nitrile rubber. Japan is not within the scope of China's anti-dumping investigation on EPDM rubber, but South Korea's supply is within the scope of the anti-dumping investigation. In 2019, South Korea ranked third among China's import sources of EPDM rubber, accounting for 23%. the Lord.
  • 05 2019-11
    Most of China's strict inspection of trucks overloaded plastics industry transportation prices rose
    On the morning of the 12th, the accident of bridge deck rollover occurred on the 312 National Road and the Xigang Road across the bridge in Wuxi, Jiangsu Province. After the accident, Wuxi, Nanjing, Suzhou and other places urgently launched the [Superior" operation overnight, followed by Zhejiang and Hunan. Seven provinces including Anhui, Henan, Guangdong, Hainan, and Fujian have also launched measures to control over-treatment. Wuxi urgent release limit order: all transport large trucks are strictly limited! Once the overloaded vehicle is detected, the driver deducts the penalty and fines! The delivery manufacturer bears joint and several liability and imposes a fine of 10,000 to 100,000 yuan! Jiangsu On October 10th, the Office of the Leading Group for Overloading and Overloading of Vehicles in Suzhou City issued the [Emergency Notice on Further Strengthening the Work of Overloading and Overloading Investigations" overnight: clearly requiring all the super-sites to carry out 24-hour duty inspection and investigation work, and further strengthen the [100-ton king" "Investigate the efforts of vehicles, increase the investigation and handling of over-limit vehicles for ordinary highway toll stations, and further strengthen the management and control of the source of freight enterprises. On the 11th, Wuxi Mayor Huang Qin led a team to conduct a special inspection of the Wuxi Over-limit Monitoring Station, and resolutely found them together and strictly investigated them. Shanghai Shanghai continues to maintain a high-pressure situation, taking multiple measures to strictly check over-limit vehicles. On the morning of the 11th, law enforcement agencies seized six illegally transported trucks during normal law enforcement inspections. Fujian In Fujian, on October 12, the traffic law enforcement department of Quanzhou City, Fujian Province severely cracked down on il
  • 05 2019-11
    Michelin tires 4th price adjustment
    According to foreign media, Michelin North America (MNA) announced the fourth increase in tire prices, starting from December 1, the US and Canada sales of Michelin and BF Lu brand truck tires, as well as Oliver brand retreaded tire product prices, Increase by 4.9%. Michelin North America's three price adjustments during the year: On September 1, the price of some Michelin and BFlux brand passenger cars and light truck tires in the US and Canada was raised by 5%. On July 1, the price of Uniroyal brand commercial tires and [selected" Michelin brand off-highway tires was increased by 6%. At the beginning of this year, the sales price of passenger car and light truck tires, Uniroyal brand household tires and Michelin brand two-wheel tires sold in the United States and Canada increased by 5% since January 1. Recent price increases by other tire manufacturers in the US market: Yokohama Tire: From November 1st, the price of its household tires (including passenger tires, high-performance tires and light truck tires) will be increased by 5% in the United States. Pirelli Tyre (North America): From October 1st, the price of passenger cars and light truck tires in the US replacement market will be raised. The increase will vary depending on the product line and tire size, and will be directly related to the price increase. communication. Pirelli has already raised the average tire price by 6% as early as January 1. US Cooper Tire: Raises the price of the Cooper and Roadmaster brand truck tires in the middle of the year to compensate the US government for raising import tariffs on truck tires from China. The price increase took effect after the start of the second quarter, and the price increase was not mentioned.
  • 29 2019-08
    Introduction of common rubber machinery equipment (knowledge)
    Common rubber machinery equipment introduction It is a machine for preparing rubber or semi-finished products, including raw material processing machinery, rubber mixing machine, extruder, calender, curtain canvas pretreatment device and cutting machine. Rubber mixing machine: The rubber mixing machine is divided into two types: open type and closed type. Open rubber mixing machine (opening machine): The twin-roller open-type rubber mixer began production in 1826. Its structure is relatively simple and modern is still widely used. Mainly used for rubber heat, tableting, gel breaking, plasticating and mixing. It consists of a roller, a roller bearing, a roll gap adjustment device, an emergency brake device, a frame, a base, a transmission, and a heating and cooling system. The working principle of the open type rubber mixing machine is that the raw rubber or rubber is pulled into the nip by friction between two rolls of opposite speeds, and is strongly sheared and pressed to increase the plasticity. Closed rubber mixing machine: (internal mixer) Invented elliptical rotor closed type rubber mixing machine in 1916 Mainly used for rubber mastication and mixing. It has one more mixing chamber than the open mixer (Figure 1). After the raw rubber and the compounding agent are loaded into the mixing chamber from the feeding hopper, the material door is closed, the upper top bolt of the pressing device is pressed, and the two rotors in the mixing chamber are rotated at different or the same speed. The loaded rubber is subjected to constant stirring, folding and strong kneading between the rotor and the rotor and the mixing chamber to produce an oxidative
  • 29 2019-08
    Sulfur fumes are too large, how to solve it from the formula?
    Chemical analysis of rubber vulcanized smoke constituents The chemical composition of rubber vulcanized flue gas is very complicated. In the past, we have studied the composition of different rubber types and different compounding agents (ie different formulations), mainly including alkanes, alkenes, aromatic hydrocarbons, fused ring compounds, CR ( There will be hydrogen chloride, halogenated hydrocarbons), complexes containing sulfur compounds such as hydrogen sulfide, sulfur dioxide, mercaptans, thiophenes, morpholine (carcinogens), CZ with benzothiazole, cyclohexylamine, etc., TT will produce carbon disulfide There are also dimethylamine and the like. Low or no sulfur in the formulation is beneficial for reducing toxic sulfur compounds. Sulfur fumes are too large, how to solve it from the formula? Suggest: 1. The oil material adopts high flash point and low volatility; 2. Reduce the amount of low melting point substances in the coordination system; 3. Control the moisture and volatile matter of raw materials; 4. The vulcanization temperature is appropriately lowered.
  • 12 2019-08
    The benefits and problems of the piece rate method!
    The salary methods used by different companies are different, there are timekeeping and piece counting (most companies are using the timing method), and the advantages and disadvantages of the piece-rate wage method are discussed. Benefits of using the piece rate system: First, it can improve the enthusiasm of employees and improve the production efficiency of enterprises. Because it is more work, employees earn wages based on their own ability, so as long as they are really a person, they are generally not lazy! Second, employees themselves will spontaneously improve their labor methods and strengthen their labor skills! Can form a strong competitive atmosphere, let employees and employees form a chase between you and each other. Third, let the company's expenditures be relatively clear, which is conducive to cost control and effectively control hidden waste. The disadvantages of using the piece rate system: First, employees are more likely to talk only about quantity and not quality. Responsive to quality requirements Second, as long as it is a piece-rate system, there will be an uneven phenomenon, more contradictions, poor handling, and easy to generate fluctuations. Third, small orders are not easy to handle, too much effort, and the benefits are few. Fourth, every time a new product goes online, it must be treated with caution, and the requirements for management personnel are much improved. Things to pay attention to when implementing the piece rate system: First, you need a manager who is proficient in craftsmanship and proficient in the price forecast, accurate and authoritative. This is the first condition. The so-called is not a diamond, not a porcelain. The person who has a fixed price must be knowledgeable. It must be a person with rich industry exper
  • 17 2019-07
    Formula and processing technology of fluorine rubber
    Fluororubber is a synthetic rubber containing fluorine atoms. It has the characteristics of high temperature resistance, oil resistance and resistance to various chemicals. It is the best medium resistance of all elastomers and has excellent weather resistance and weather resistance. Ozone resistance. One of its main varieties is a copolymer of perfluoropropene and vinylidene fluoride, the foreign trade name viton, the other is a copolymer of chlorotrifluoroethylene and vinylidene fluoride, the foreign trade name Kel-F (rubber), they High temperature resistance, Kel-F maximum application temperature is 205 ° C, excellent corrosion resistance, resistant to various acids (including medium concentration of oxidizing acid), but solvent resistance is not as good as fluoroplastics, can be used for high temperature and resistance in chemical industry Corrosive environment, also used as rubber coatings and adhesives. Fluororubber can replace the need for anti-corrosion treatment, but the F4 spray method and the lining method can not operate the medium and large equipment. From the cost point of view, the fluororubber anticorrosion is also lower than the F4 anti-corrosion. The formulation of fluorine rubber is composed of fluorine rubber, acid acceptor, vulcanizing agent, accelerator, reinforcing filler and processing aid. The performance of domestic fluororubber and foreign fluororubber is basically the same, but the processing performance is somewhat different. The processing performance of domestic rubber is poor, mainly because the Mooney viscosity is high, which affects the poor fluidity of rubber processing. The domestic type 26 fluororubber is equivalent to VitonA of DuPont, USA, and the 246 type fluororubber is equivalent to VitonB of DuPont of the United States. The vulcanizing agent of the fluorine rubber plate is to make the fluorine rubber have a certain degree of crosslinking, so that it has good performance. The vulcanization of the f
  • 17 2019-07
    What is the best way to distinguish the true and false materials of silicone rubber products?
    No matter how to defend and disguise the gel products, they can't cover the thick compound. When it comes to chemicals, most of them are related to environmental hazards, and neither plastic nor rubber can cover them, while silicone rubber products are different. However, it is usually said that most of the friends of the gel products are purely preventive, so it is necessary to elaborate on the most practical method for distinguishing the true and false materials of silicone products. At present, there are many daily necessities in the silicone rubber products industry in Dongguan. The medical device products and electronic accessories products are all made of silicone material. The difference between silica gel and other rubber types is that the chemical composition is different. It mainly contains white carbon. Black, silicone, silicone oil, and compounding vulcanizing agents, as well as additives added to the coloring gel, do not contain harmful compounds. In the silicone material, it is purely a certain reference material. For example, in order to save costs, low-cost raw materials, raw material suppliers add catalysts to improve efficiency, etc., so the method of truly distinguishing between true and false and quality is as follows: 1, color: Silicone rubber products can be adjusted with a variety of different colors according to the international Pantone color number, so there is no difference from the color above, and there is no flaw after the appearance treatment, but the main thing is to stretch and see the rebound. There will be no whitening or light transmission. If there is any material, it may belong to ordinary materials! 2, feel: The feel is very important. Whether it is stretching, rebound, deformation and toughness of silicone products is very important. If you achieve the above performances, it is basically a high-quality material, generally f
  • 17 2019-07
    What are the big problems caused by small silicone accessories?
    In our daily life, kitchen supplies are a must-have auxiliary tool, and we may have a big safety hazard by inadvertently neglecting some small problems. Some tools ignore the big security problems, such as in our lives. In the leakage of gas, the sealing problem of the pressure cooker, etc., the small series of the silicone products of Dibo today talk about the sealing problem of the pressure cooker. In daily life, we will not pay attention to some details when using the pressure cooker, especially the small and difficult to detect, and the silicone fittings are mainly to prevent the pressure of the pressure cooker, and then the explosion-proof effect under the high pressure, on the pressure cooker With good performance, the pressure cooker seal can withstand high pressure in the range of 180 kPa to 280 kPa. Its material is mainly made of non-toxic, tasteless and good performance silicone products. Now some silicone products factories can basically Processing and production, but in the pressure cooker, once the sealing ring has problems, the consequences are unimaginable, so in the use of the sealing ring, try to use high quality silicone products. Sealing ring is currently available in the market with silicone and rubber. The sealing ring of silicone material is mainly used in some places where we are constantly in contact with and harmless to the human body. The sealing ring made of rubber is mainly used in some industrial industries, above the agro-industrial industry. At present, the silicone products on the market have basically replaced a lot of rubber products. The sealing ring on the top of the pressure cooker is embedded in the top of the pressure cooker lid to seal and resist the pressure. The common aluminum inner cover is directly covered with a sealing ring. Another is that the wire ring puts the sealing ring on it, but for the pressure cooker, the quality of the sealing ring is the
  • 05 2019-07
    Rubber production process
    1. Basic process Along with the rapid development of modern industry, especially the chemical industry, there are many kinds of rubber products, but the production process is basically the same. The product is made of general solid rubber (raw rubber), and its production process mainly includes: Raw material preparation→Mastication→Kneading→forming→vulcanization→dressing→inspection 2. Raw material preparation The main materials of rubber products are raw rubber, compounding agent, fiber material and metal material. The raw rubber is the basic material; the compounding agent is an auxiliary material added to improve certain properties of the rubber product; the fiber material (cotton, hemp, wool and various rayon, synthetic fiber) and the metal material (steel wire, copper wire) It is used as a skeleton material for rubber products to enhance mechanical strength and limit product modification. In the preparation of raw materials, the ingredients must be weighed according to the formula. In order to allow the raw rubber and the compounding agent to be uniformly mixed with each other, some materials need to be processed: 1. Basic process Along with the rapid development of modern industry, especially the chemical industry, there are many kinds of rubber products, but the production process is basically the same. The product is made of general solid rubber (raw rubber), and its production process mainly includes: Raw material preparation→Mastication→Kneading→forming→vulcanization→resting→testing 2. Raw material preparation The main materials of rubber products are raw rubber, compounding agent, fiber material and metal material. The raw rubber is the basic material; the compounding agent is an auxiliary material added to improve certain properties of the rubber product; the fiber material (cotton, h
  • 05 2019-07
    Silicone rubber formula design
    Compared with general-purpose rubber, silicone rubber has a relatively simple compounding component of all three types of silicone rubber, as well as a hot-vulcanized type. In addition to raw rubber, the compounding agent mainly includes a reinforcing agent, a vulcanizing agent and some special auxiliaries, and generally only needs 5 to 6 components to form a practical formula. The silicone rubber formulation design should take into account the following points. (1) Silicone rubber is a high-saturation raw rubber, which is usually not vulcanizable with sulfur, but is heat vulcanized. Thermal vulcanization uses organic peroxides as vulcanizing agents. Therefore, the rubber compounds must not contain active substances that can interact with the decomposition products of peroxides, otherwise they will affect vulcanization. (2) Silicone rubber products are generally used at high temperatures, and the compounding agent should be stable at high temperatures. For this reason, inorganic oxides are usually used as reinforcing agents. (3) Silicone rubber can easily cause cracking and rearrangement of siloxane bonds under the action of a trace amount of polar chemicals such as acid or alkali, resulting in a decrease in heat resistance of silicone rubber. Therefore, it is necessary to consider them when selecting compounding agents. The acidity and alkalinity should also take into account the acidity of the peroxide decomposition products so as not to affect the properties of the vulcanizate. (1) Selection of raw rubber When designing the formula, the raw rubber with different characteristics should be selected according to the performance and use conditions of the product. For general silicone rubber products, the temperature is in the range of -70 ° C ~ 250 ° C, vinyl silicone rubber can be used; when the product temperature requirements are high (-90 ~ 300 ° C), low phenyl silicon can be used
  • 05 2019-07
    Vulcanization and foaming mechanism of styrofoam extruded tube
    1. Vulcanization and foaming mechanism of foamed rubber extrusion tube 1. Coordination of vulcanization and foaming The vulcanization rate is matched to the foaming speed. No one can be much faster than the other. The vulcanization rate is too fast: the foaming agent cannot be broken down due to the strong mechanical force of the vulcanized rubber to foam the rubber compound. The vulcanization rate is too slow: the foaming agent decomposes the gas in the state of the rubber completely or nearly completely unvulcanized to foam the rubber compound, but at the same time, the surface of the rubber compound is also broken by the gas, so that the surface of the rubber tube is uneven or has pores. Comparison of two speeds: Generally, the vulcanization speed needs to be slightly faster than the foaming speed, so that one can ensure the smoothness of the surface of the hose, and the foaming agent can be smoothly decomposed out of the gas to foam the rubber compound. 2, the foaming process of the hose Microwave: The foaming of the hose is mainly done by microwave heating. The heat pipe of the microwave is used to heat the hose from the inside to the outside. When the inside of the hose is just beginning to be heated and foamed, the relative temperature of the rubber outside the hose is relatively low and the vulcanized tube is not cured. This heating method from the inside to the outside ensures that the hose can be foamed smoothly. The vulcanization of the hose is accompanied by vulcanization while microwave heating, but the vulcanization at this time does not reach the final vulcanization depth. After exiting the microwave, enter the hot air heating section to complete the final vulcanization of the hose. To complete the vulcanization and foaming of the hose. Second, the formula design 1, raw rubber The choice o
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