Compression Grade Analysis of Automotive Door Seals Made From TPV-E
Journal Title: RECENT - Year 2012, Vol 13, Issue 36
Abstract
Reducing costs in the automotive industry can be achieved by using new materials able to satisfy technical requirements, but with economic advantage. Such materials are for inner door waist belt the combination TPV-E/PP (vulcanized thermoplastic elastomer / polypropylene). Like any new materials, TPV PP-E and bring along a series of questions on the nature of technology and design, to be resolved. One of these problems is the degree of compression of the material in later phase thermal processing (extrusion). This degree of compression is essential for compliance with length tolerances, typically ± 1 mm, functional requirements imposed by car. Studies conducted show a dependence between the environmental temperature (in the conditioning) and the degree, respectively the time of compression the waist belt. The conclusion of the authors is that tolerance of ± 1 mm length of the finished product can not be achieved without conditioning profiles cut to over dimension. This technological step to be implemented before final stamping. To remove the influence of environmental temperature in the conditioning on the time required to achieve maximum compression, the authors recommend between final extrusion and punching a conditioning window of at least 4 hours.
Authors and Affiliations
Christian ASTALOSCH, Cătălin ATANASIU
Keywords
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