China's demand for special rubber products is growing, while a large number of special rubber products are still heavily dependent on imports. For the automotive industry, in the high-speed rotary seal design and production technology, production equipment, China's rubber seal industry level and the gap between the advanced level is still large; in the detection technology, the seal of the various important parameters of the test and simulation Is blank Product reliability and life expectancy, in recent years, due to structural adjustment and reform and other factors, such basic research in enterprises basically stopped. Enterprises and research institutes focus on the large-scale production and product structure of the new research, as well as the introduction of technology digestion, absorption and localization, significantly increased the development of new products.
1, a representative of new products
Seals of the "octagonal" construction: An "octagonal" seal was developed by Freudenberg for the sealing system of a miniature cylinder with an inner diameter of 8 to 25 mm for the new octagonal piston.
With reliability, piston rod can play a permanent role in sealing.
Optimized sealing function "of the piston rod seal: Bauhinia plate developed with" optimized sealing function "of the piston rod seal for forklifts, agricultural machinery, construction machinery and locomotives and injection molding machine hydraulic system. It has fast installation And will not damage the seal, long life and other advantages.
Large multi-limb seal: developed by the Guangzhou Institute of Mechanical Seal Institute developed multi-limb seals, oil film bearing the key components, with a double seal:
Multi-limb seal of the five "lips" from the seal water, oil seal, dust and other effects.
YG2000 composite O-ring: Developed by Shanghai YIANG Gang Metal Sealing Material Co., Ltd., it is made of transparent fluorine-plastic coated fluorine rubber O-ring, resistant to elemental fluorine and all the metal other than metallic sodium in molten state;
In recent years, some new products have also emerged in the field of national defense research.
2, technology and equipment and testing technology
Seals production equipment and testing technology is moving in the direction of automation, low cost and high reliability.
Molding process: Widely used abroad, efficient, advanced and high quality rubber injection molding processing technology. Production of small screw reciprocating injection machines, large-scale products with screw plunger injection machines, can effectively improve the appearance of seal quality and performance, save raw materials. Parker company produces O-rings, using the injection machine to make a very small flash products, with liquid nitrogen frozen trimming, trimming plastic pellets and water stone wash three processes, the appearance of the product quality has reached a very high level.
Vulcanization process equipment: Many domestic seal manufacturers equipped with vacuum plate and injection molding machine, for ordinary flat vulcanizing machine is also recycled oil heating transformation to ensure process stability.
Austria love Norman company, in the traditional production of seals have a greater breakthrough. The company produces seals for machining equipment that can be machined to produce seals that are suitable for the production of a wide range of materials and seals, and whose market share is expanding year by year.
Detection technology:
The latest development is the use of optical systems. For example, Freudenberg and other companies have adopted the KMK company developed the third generation of new optical system, completely replaced the manual test, the successful seal of the quality testing is fully integrated into the production process, this image processing system to achieve a high detection Speed ​​and detection accuracy, it can detect the slightest defects on the surface of the seal, such as cracks, slip lines, pores, bubbles and impurities, easy to operate, and can effectively ensure the consistency and reliability of the results. The system has two linear detection systems and rotation detection system: linear detection system based on the O-ring geometry and the product's surface state, recorded by the 16 cameras, and intelligent software analysis. After the automatic separation or reverse parts to achieve the surface, holes, slip lines and the optimal detection of abnormal factors, with flash burr seal can be individually picked out for repair. Waste products can also be based on different standards were placed in different containers, can detect 30,000 O-ring per hour; rotation detection system can be additional deformation, testing the surface of the seal as small as ± 0.02mm abnormalities. 1800 to 3600 parts per hour can be analyzed, but also the spring is assembled in place for determination. Both test systems are fully automated and are currently used for high quality seal inspection.
Japan NOK research company oil seal visualization technology is the world's first successful oil film in the oil seal and the rotating shaft of the flow of state visualization to improve the theoretical and practical accuracy of anastomosis; using molecular dynamics simulation technology to simulate the intermolecular Activity that predicts the effects of gas and oil on the extreme conditions of rubber and plastics to analyze the impact of oil additives on rubber and plastics.
Domestic seal enterprises also introduced the measurement of oil seal lip tension as the main basis for the oil seal detection device; to detect changes in pressure seal lip seal gas sensor (Italy), with a high detection rate can be detected every hour 1200 ~ 1800 oil seal.
3, mold design and processing technology development
Rubber seal mold design and processing, advanced countries all use of CAD / CAE / CAM technology. Manufacturers attach great importance to the secondary development of design software, with good mold cavity material processing fluidity analysis capabilities. Processing and manufacturing has been widely used CNC machine tools, large companies basically realize the full numerical control. Mold accuracy, apparent quality reached a very high level.
Many domestic enterprises have also equipped with rubber seals CNC machining equipment, but in the mold design and application of CAD / CAM little experience, may wish to learn from other industries in the injection molding process and mold design and manufacturing applications CAD / CAM experience to speed up the pace of my industry applications.
4, sealed the development of computer networks and information technology industry
â‘ internal network of enterprises, information technology
Part of the rapid development of China's seal manufacturers, enterprise resource management (ERP) applications have been catching up with international standards, some key enterprises have adopted ERP. Qingdao Keppel seal company in the application of ERP based on the further implementation of "seal life-cycle product management" technology software development, and constantly improve the level of enterprise information.
â‘¡ network technology for the traditional sealing industry to bring a new atmosphere
Many seal companies have set up their own website / webpage to expand their own publicity, promote the exchange between enterprises. User-friendly website design allows visitors to easily understand the business and its product information; businesses through the network access to relevant information at home and abroad, effectively changing the difficult situation of foreign exchanges, effectively promoted the technological progress of the industry; companies in When formulating the development plans at all stages, we can learn about the government-related macroeconomic policies and industry dynamics through the government network. The rapid access to these information depends on the continuous development of information technology, many advanced production technology and new material information can be timely delivery through the network.
â‘¢ e-commerce brings new business opportunities
With the online payment, network security and logistics issues have been gradually resolved in the near future, e-commerce business will bring new profit growth point. Many domestic and international seal companies have spotted this opportunity to open stores online. The traditional sales methods of seals will face new challenges.
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