专利内容由知识产权出版社提供
专利名称：METHOD FOR MANUFACTURING IMPELLER发明人：Ryoji OKABE,Yasunori WATANABE,Kosuke
IKEDA
申请号：US15544457申请日：20151112
公开号：US20180029273A1公开日：20180201
专利附图：
摘要：The present invention prevents internal cracks occurring when an impellermolded using a fiber reinforced resin is manufactured by injection molding. This methodfor manufacturing an impeller is provided with: an injection step of filling a cavity with a
molten resin containing reinforced fibers, from a gate side into which the molten resinflows, toward an opposite-gate side opposite to the gate side; and a dwell step ofapplying required pressure to the filled molten resin. In the injection step and the dwellstep, directional cooling is performed with a temperature gradient such that thetemperature becomes lower from the gate side toward the opposite-gate side.
According to this method for manufacturing the impeller, the opposite-gate side shrinkswith a decrease in the temperature of the molten resin since the temperature of theopposite-gate side is lower. Meanwhile, because the temperature on the gate side isincreased, the molten resin can be replenished from the gate side so as to correspond tothe amount of shrinkage on the opposite-gate side, and therefore the occurrence ofinternal tensile residual stress and cracks due to the shrinkage can be prevented.
申请人：MITSUBISHI HEAVY INDUSTRIES, LTD.
地址：Tokyo JP
国籍：JP
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