Manufacturing method of resin damper having foamed resin seal material
AssigneesNippondenso Co., Ltd., Shimizu Industry Co., Ltd.
InventorsTakaaki Horie, Kazutoshi Higashi
Life of this patent
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Abstract
The present invention relates to a manufacturing method for a damper which is effective when used for a car air conditioner as a air flow switching door. A resin damper body to which surfaces foaming resin seal materials are joined is formed by setting the foaming resin seal materials within mold spaces beforehand and then injecting the resin thereinto, and during which process the damper body and the seal materials are joined together. Particularly, the structure of the metal molds, the structure of an injection nozzle, and the shape of the seal materials are improved in order to improve the shape of the seal materials and the shape of the damper body during the injection molding.
Claims4
A method for producing a damper which comprises a damper body for controlling air flow, and foam resin seal materials attached to surfaces of said damper body for sealing said damper body, the method comprising:
- disposing said seal materials within metal molds, wherein at least one of said molds has a recessed part formed within said at least one mold nearby an injection nozzle;
- compressing said seal materials by clamping said molds together;
- forming said damper body within a mold space formed by clamping said metal molds, then injecting a resin with said injection nozzle into the mold space through a passage defined through said seal materials, and at the same time joining said damper body and said seal materials by partly impregnating the resin into cells of said seal material;
- and
- arranging a flow of the resin injected from said injection nozzle into said mold space so as not to be parallel to a portion of said seal material nearby said injection nozzle and then reversing the flow of resin injected into said mold space through the passage defined through said seal materials within said mold space whereby resin flows towards said recessed part so that said seal materials are prevented from being displaced in a direction perpendicular to a direction of compressing of said seal materials and resin is prevented from flowing between a seal material and a metal mold.
A method for producing a damper which comprises a damper body for controlling air flow, and foam resin seal materials attached to surfaces of said damper body for sealing said damper body, the method comprising:
- disposing said seal materials within metal molds, wherein an injection nozzle for said metal molds is projectingly formed within a mold space between said molds and a recessed portion facing said injection nozzle within one of said metal molds is formed in the direction opposite said injection nozzle;
- compressing said seal materials by clamping said molds together;
- forming said damper body within said mold space formed by clamping said metal molds, then injecting a resin with said injection nozzle into the mold space through a passage defined through said seal materials, and at the same time joining said damper body and said seal materials by partly impregnating the resin into cells of said seal material;
- and
- arranging a flow of resin within said mold space so as not to be parallel to a portion of said seal material nearby said injection nozzle by reversing the flow of resin injected into said mold space through the passage defined by said recess through said seal materials within said mold space such that said seal materials are prevented from being displaced in a direction perpendicular to a direction of compressing of said seal materials and resin is prevented from flowing between a seal material and a metal mold.
A method for producing a damper which comprises a damper body for controlling air flow, and foam resin seal materials attached to surfaces of said damper body for sealing said damper body, the method comprising:
- providing a recess in one of a pair of metal molds at a position facing said injection nozzle;
- disposing said seal materials within metal molds;
- compressing said seal materials by clamping said molds together;
- forming said damper body within a mold space formed by clamping said metal molds, then injecting a resin with an injection nozzle into the mold space through a passage defined through said seal materials, and at the same time joining said damper body and said seal materials by partly impregnating the resin into cells of said seal material;
- and
- arranging said flow of resin within said mold space so as not to be parallel to a portion of said seal material nearby said injection nozzle by reversing the flow of resin injected into said mold space through the passage defined by said recess through said seal materials within said mold space such that said seal materials are prevented from being displaced in a direction perpendicular to a direction of compressing of said seal materials and resin is prevented from flowing between a seal material and a metal mold.
Dependencies are inferred from the claim text.