Automotive sealing composite extrusion workmanship

Currently, the auto body sealing materials commonly used in EPDM rubber (EPDM) or polyvinyl chloride (PVC). EPDM rubber (EPDM) is ethylene, propylene monomer is added small amount of non conjugated diene elastomeric polymer material formed, which structure is characterized by the molecular chains of the polymer are all unsaturated double bonds, and in the branched-chain by introducing an unsaturated double bond, which has excellent weather resistance, heat resistance, ozone resistance, UV resistance and good processability and low compression resistance, is the production of automobile sealing material of choice, generally vehicles produced using EPDM seal material life of up to ten years. PVC materials used in surface decoration is more demanding automotive seals, such as the roof trim, inner and outer window seal. With the auto industry, can be used in automotive sealing strip processing and production of new materials more and more. Wherein the thermoplastic elastomer (TPE) material is the most prominent of a new type of environmentally friendly materials, it is mainly divided polyolefin (TPV, TPO) polyurethane (TPU) polyester (TPEE): Polyvinyl Chloride (TPVC) poly amides (TPAE) and other types of thermoplastic elastomer. The seal used in automotive products mainly polyolefins (TPV, TPO) thermoplastic elastomer material, such materials and glass friction coefficient, wear resistance, can be used as automotive glass guide groove, outside door glass seal strip and part of the auxiliary seal materials. In addition, a variety of automotive sealing auxiliary materials increasingly focused on environmental requirements, such as various environmentally friendly adhesives, water-based coating materials applications.
In the automotive sealing composite extrusion process, the high degree of automation, domestic technology is relatively mature, there are many car companies can conduct business needs sealing extrusion line group line design, processing and debugging. Compared with foreign extrusion lines, the domestic production line of inexpensive production lines imported only about 1/3, the device capability index is low, the low-end models usually applied to seal products. Automotive sealing compound extrusion process of the most important parameter is the normal production of extrusion speed, this parameter is larger, the output of automotive sealing products, lower overall costs, market competitiveness is stronger. The process parameters determine the merits of the factors, in addition to complete production line equipment capabilities, suitable for high-speed extrusion materials, structures, formulation design will play a significant role in the decision. Currently, this parameter is generally divided into three grades: less than 10M/min, 10M-20M/min, greater than 20M/min. Most of the domestic automobile enterprises in 10M/min seal within a few joint ventures and Chinese-funded enterprises reached 10M-20M/min, and foreign automotive sealing business basically in 20M/min more.metal seal
After sealing strip in the car after the extrusion process, the current domestic labor costs are lower, generally low degree of automation, is a labor-intensive process. However, with the continuous development of the national economy, domestic labor costs will gradually increase, the automotive sealing enterprises will gradually introduce and develop a high degree of automation, post processing equipment.
In addition, automotive sealing strip after processing, along with the development of science and technology, has emerged a group of new technology and equipment, such as a rotary electrostatic flocking equipment appears to solve automotive sealing problems multidirectional nylon flocking fasteners automatic assembly machine to replace the traditional manual assembly fasteners way, not only can improve production efficiency and reduce the number of employment, but also to avoid the leakage fasteners installed, the wrong equipment and other quality problems occur tapered composite extrusion technology has greatly improved automotive sealing products can be installed, sealing, decorative features such as a variety of film tape (flocking band, PE hardbanding, TPV colored decorative ribbons, etc.) and automotive sealing strip continuous paste technology, not only simplifies the original production process, reduce production costs, but also extends the automotive sealing industry chain.barrier security seals