Patent ID: 6641768
Filing Date: 2003-11-04
Classification: B29C,B29L,B60H

Abstract:
A method for manufacturing an air passage switching door, the air passage switching door including a door body made of a material having a rigidity higher than a predetermined value, a seal member made of an elastic material having a heat shrinkage, and a rotation shaft provided integrally with the door body for rotating the door body, wherein: the seal member continuously extending from the outer peripheral portion of the door body toward an outer side to have a thin plate shape; a length of the seal member extending along the outer peripheral portion at one side of the rotation shaft is equal to or larger than 100 mm; and a thickness of the seal member is equal to or smaller than 2.0 mm, the method comprising:an injecting step for injecting a melted elastic material from plural injection gates provided at plural positions into a mold space within a forming die for forming the seal member of the door, wherein, in the injecting step, a flow length of the melted elastic material from each injection gate is equal to or small than 40 mm.