公开(公告)号：US20220410453A1

公开(公告)日：2022-12-29

申请号：US17901927

申请日：2022-09-02

Applicant: DENSO CORPORATION

Inventor： Tohru HIGUCHI ,  Masato ICHIKAWA ,  Tsuyoshi ARAI ,  Jun HASEBE ,  Atsushi KAWAMURA ,  Tomoyoshi MURATA

IPC: B29C45/27 ,  B29C45/16

Abstract: In an injection process, molten resin is successively injected from a first flow channel and a second flow channel connected with each other in order into a cavity of a metal mold. High-temperature resin existing in the first flow channel is injected in advance into the cavity as a part of a single shot of molten resin to later form a skin layer of a molded article. Other low temperature resin near a flowable limit existing in the second flow channel is subsequently injected into the cavity as another part of the single shot of molten resin to later form a core layer of the molded article. A low temperature resin remaining in the first flow channel when injection is completed is warmed to be a high-temperature resin before the next cycle, thereby allowing successive molding of molded articles.

公开(公告)号：US20200078997A1

公开(公告)日：2020-03-12

申请号：US16561102

申请日：2019-09-05

Applicant: DENSO CORPORATION

Inventor： Tohru HIGUCHI ,  Masato ICHIKAWA ,  Tsuyoshi ARAI ,  Jun HASEBE ,  Atsushi KAWAMURA ,  Tomoyoshi MURATA

IPC: B29C45/27 ,  B29C45/16

Abstract: In an injection process, molten resin is successively injected from a first flow channel and a second flow channel connected with each other in order into a cavity of a metal mold. High-temperature resin existing in the first flow channel is injected in advance into the cavity as a part of a single shot of molten resin to later form a skin layer of a molded article. other low temperature resin near a flowable limit existing in the second flow channel is subsequently injected into the cavity as another part of the single shot of molten resin to later form a core layer of the molded article. A low temperature resin remaining in the first flow channel when injection is completed is warmed to be a high-temperature resin before the next cycle, thereby allowing successive molding of molded articles.