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公开(公告)号:US12109746B2
公开(公告)日:2024-10-08
申请号:US17498801
申请日:2021-10-12
发明人: Erhard Gruber , Martin Kleinschrodt , Lili Zhao
CPC分类号: B29C45/22 , B29C45/0005 , B29C45/231 , B29C2045/279 , B29K2101/12 , B29L2031/08 , F04D29/2222
摘要: A method for manufacturing an impeller with a number of impeller blades and a cover disc covering the impeller blades. Plastic is injected into an injection mold using a cascade injection molding process to form the impeller. The injection mold has a number of shut-off nozzles to feed the plastic at various joint positions and different opening times. The number of shut-off nozzles is determined as a function of the number of impeller blades.
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公开(公告)号:USD821561S1
公开(公告)日:2018-06-26
申请号:US29560894
申请日:2016-04-12
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