Abstract：The injection formation is one of main methods for thermoplastic Injection Mould, may complex model closely by a formation shape. Because of modern automobile of uninterrupted development to light-duty, more and more plastic parts must be applied on automobile, therefore, the design and manufacture of injection mould appears particularity importantly. This paper discussed the design of plastic injection mould of one parts of Automobile Switch and its characteristics of the products for mold design. The author determined the parting surfaces and the gating system and Release the organization, cooling system etc, choosed the injection molding machine，calculated the sizes of the molding parts. adopted to sprinkle directly in the design, make use of to keep lead the pillar direction fixed position, push the pole crest to anticipate, and carried on the choice to the material of the molding tool. According one parts of Switch mold parts to the requirements of the injection parameters of the machine was calibrated. And the author also drew a set of mold assembling chart and parts chart using AUTO CAD software.
Keywords：Plastic of injection molding ; Automobile parts; Mould design； Mould parts
