Prospects analysis - ryder auto industry seal plastic

In recent years, the domestic has been introduced European high temperature and high winds, multidirectional supply heat vulcanized rubber extrusion production line. This production line is cancelled microwave vulcanization tank. After cross compound nose, set one meter long presulfurization slots. Electric heating air temperature can reach 600 ℃, instead of the previous gas flame treatment, to cure of sponge rubber surface rapidly, improve the appearance quality of the sponge sealing strip. Then set the 3 m long hot air blast type vulcanizing tank, the temperature can reach 450 ℃, instead of microwave heating vulcanization tank. Type and strong winds is a very big length vulcanizing tank, the temperature can reach 320 ℃, each slot and three sections of temperature control, multidirectional air supply. In order to save energy, in the vulcanization tank, and a small sulfide with adjustable open slot box, heating the air in addition to the oil mist after purification can use over and over again. The vulcanizing tank into a hot air outlet wind speed can reach 50 ~ 60 m/s, this production line is mainly characterized by can significantly improve the quality of the appearance of the rubber sealing strip, but for large cross-section of rubber sealing strip should pay attention to prevent coke, "soft" issues, in addition to type of vulcanization system and carbon black in rubber formula selection and using microwave vulcanization rubber formula in terms of structure, for major adjustments. 

Sealing strip to produce variable cross-section of the structure of the automobile industry, the domestic automobile rubber sealing strip enterprises also introduced the patent technology of Europe. It is mainly the principle of the feed end and truncated end, together, through the metal skeleton microcomputer input signal, controlled by the microcomputer output signal model of the cylinder, conducted by the movement of aortic model towards sealing strip extrusion production of variable cross-section. Some also USES a color way, through the photocell control variable cross-section mouth action out of production. Simple variable cross-section mechanical method may be adopted or with PLC and other automated control method control the action of die and cutting tool or complete extrusion production of variable cross-section. But the variable cross-section sealing strip extrusion production also has its limitations: 

Such automotive sealing strip needs to have a metal frame or metal wire, can on both ends of extrusion line for microcomputer input signal; Additional coated metal skeleton rubber thickness not less than 0.8 mm, otherwise unable to extrusion; Variable cross-section pure rubber sealing strip into vulcanizing tank, for without its support, will not be able to finalize the design variable cross-section seal vulcanization. Due to the above limitations, many variable cross-section rubber sealing strip to use PVC material, in order to overcome variable cross-section structure of the insufficiency of the rubber seal extrusion process.