Method for manufacturing an air passage switching door
AssigneesDenso Corporation, Shimizu Industry Co., Ltd.
InventorsMasahiro Ito, Kosei Banno
Life of this patent
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Abstract
In a method for manufacturing an air passage switching door with a seal member extending along an outer peripheral portion of a door body, when a melted elastic material for forming the seal member is injected into a mold space from plural injection gates, a flow length of the melted elastic material is set to be equal or smaller than 40 mm. Accordingly, even when the method is used for forming the air passage switching door where a length of one side seal member extending along the outer peripheral portion at one side of a 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, a deformation of the seal member due to an inner shrinking force can be sufficiently restricted.
Claims15
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.
A method for manufacturing an air passage switching door, the air passage switching door including a door body, a seal member continuously extending from an outer peripheral portion of the door body toward an outer side to have a thin plate shape, and a rotation shaft provided integrally with the door body for rotating the door body, the method comprising:
- a primary forming step for forming the door body using a material having a rigidity higher than a predetermined value, and
- a seal member forming step for forming the seal member using an elastic material having a heat shrinkage, wherein:
- the seal member forming step includes an injecting step for injecting a melted elastic material from plural injection gates provided at plural positions of a forming die into a mold space within the forming die for forming the seal member of the door;
- and
- in the injecting step, a flow length of the melted elastic material is set to be equal to or smaller than 40 mm.
Dependencies are inferred from the claim text.