专利名称：Method of injection molding thin-walled
plastic products
发明人：Jens O. Sorensen申请号：US07/310059申请日：19890213公开号：US04960557A公开日：19901002
摘要：A method for injection molding a plastic product having a thin- walled area,includes the steps of
(a) injecting molten plastic from a gate into a mold cavity defined by and positionedbetween a first mold part and a second mold part and encompassed by a parting line, forforming the plastic product; wherein the mold parts define a thin cavity region forforming the thin-walled area of the plastic product, and one or more flow channels whichare portions of the mold cavity that are thicker than the thin cavity region;
(b) directing the injected molten plastic through the one or more flow channels intothe thin cavity region, whereby the molten plastic directed from one portion of a flowchannel joins with the molten plastic admitted from the gate or directed from anotherportion of a flow channel; and< P>
(c) melding the molten plastic directed from the one portion of a flow channel withthe molten plastic admitted from the gate or directed from the other portion of a flowchannel in a meld chamber defined by the mold parts, the meld chamber being a portionof the mold cavity that is thicker than the thin cavity region to enhance the melding of
plastic flowing from different directions into and joining together in the meld chamber,wherein the thickest portion of the meld chamber is displaced from the gate and theflow channel by the thin cavity region, the meld chamber being at least partly locatedextensively between the one portion of a flow channel and the gate or the other portionof a flow channel where molten plastic directed into the thin cavity region by the oneportion of the flow channel joins molten plastic admitted into the thin cavity region fromthe gate or directed into the thin cavity region by the other portion of a flow channel.
申请人：ACEBO COMPANY
代理人：Edward W. Callan
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