Method of two-stage injection molding of air conditioner outlet vent device
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United States of America Patent
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Jun 12, 2007
Grant Date -
Oct 7, 2004
app pub date -
Apr 4, 2003
filing date -
Apr 4, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of two-stage injection molding of an air conditioner outlet vent device is provided, the device including a housing, a plurality of blades pivotably supported by the housing and disposed in parallel to each other within the housing, and a link operatively connecting the blades. The plurality of blades are injection-molded in a secondary injection step subsequent to a primary injection step in which the housing is molded. In the secondary injection step, a molten resin is injected into cavities formed within a mold device in a closed mold state from a plurality of gates provided in portions of the mold device corresponding to projections of the blades. It is thus possible to improve the strength of link shafts and the projections while preventing any malfunction of the blades pivoting and any deterioration of the surface appearance, as well as to increase the degrees of freedom in changing the gate diameter.
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