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    • 8. 发明授权
    • Method for expansion injection molding
    • 膨胀注塑方法
    • US07704423B2
    • 2010-04-27
    • US10504332
    • 2003-02-28
    • Hiroyuki TakatoriAkio OkamotoNaoto YamamotoFumihiko Shimizu
    • Hiroyuki TakatoriAkio OkamotoNaoto YamamotoFumihiko Shimizu
    • B29C45/00B29C44/38
    • B29C44/586B29C44/60
    • An injection-foaming molding process for manufacturing a formed article by injecting a molten resin containing a foaming agent into a cavity of a mold being retained in an openable state and then expanding the cavity by opening the mold to allow the resin to foam includes: i) a step of discontinuing a cavity of a mold from a resin-reserving section located at front end of a screw immediately after the completion of injection of a molten resin containing an expandable resin into the mold cavity; and ii) a step of keeping the resin-reserving section under pressure at least equal to back pressure for charging during a period from the completion of injection to start of charging the molten resin containing the expandable resin for next shot, decreasing pressure in the resin-reserving section to back pressure for charging, and then starting the charging. According to the process, a molding cycle can be shortened and a lightweight formed article by foaming having high rigidity and good appearance can be obtained.
    • 一种用于制造成型制品的注塑 - 发泡成型方法,其通过将含有发泡剂的熔融树脂注入到可开启状态的模具的空腔中,然后通过打开模具使模具膨胀以使树脂发泡,包括:i )在完成将含有可膨胀树脂的熔融树脂注入到模腔中之后立即从位于螺杆前端的树脂保留部分停止模具的腔的步骤; 以及ii)在从完成注射开始到含有用于下一次喷射的可发性树脂的熔融树脂开始充填期间,将树脂保留部分保持至少等于充电背压的步骤,降低树脂中的压力 - 保留部分用于充电的背压,然后开始充电。 根据该方法,可以缩短成型周期,并且可以获得具有高刚性和良好外观的通过发泡的轻质成形制品。
    • 10. 发明申请
    • Method for expansion injection molding
    • 膨胀注塑方法
    • US20050230861A1
    • 2005-10-20
    • US10504332
    • 2003-02-28
    • Hiroyuki TakatoriAkio OkamotoNaoto YamamotoFumihiko Shimizu
    • Hiroyuki TakatoriAkio OkamotoNaoto YamamotoFumihiko Shimizu
    • B29C44/58B29C44/60B29C65/00
    • B29C44/586B29C44/60
    • An injection-foaming molding process for manufacturing a formed article by injecting a molten resin containing a foaming agent into a cavity of a mold being retained in an openable state and then expanding the cavity by opening the mold to allow the resin to foam includes: i) a step of discontinuing a cavity of a mold from a resin-reserving section located at front end of a screw immediately after the completion of injection of a molten resin containing an expandable resin into the mold cavity; and ii) a step of keeping the resin-reserving section under pressure at least equal to back pressure for charging during a period from the completion of injection to start of charging the molten resin containing the expandable resin for next shot, decreasing pressure in the resin-reserving section to back pressure for charging, and then starting the charging. According to the process, a molding cycle can be shortened and a lightweight formed article by foaming having high rigidity and good appearance can be obtained.
    • 一种用于制造成型制品的注塑 - 发泡成型方法,其通过将含有发泡剂的熔融树脂注入到可开启状态的模具的空腔中,然后通过打开模具使模具膨胀以使树脂发泡,包括:i )在完成将含有可膨胀树脂的熔融树脂注入到模腔中之后立即从位于螺杆前端的树脂保留部分停止模具的腔的步骤; 以及ii)在从完成注射开始到含有用于下一次喷射的可发性树脂的熔融树脂开始充填期间,将树脂保留部分保持至少等于充电背压的步骤,降低树脂中的压力 - 保留部分用于充电的背压,然后开始充电。 根据该方法,可以缩短成型周期,并且可以获得具有高刚性和良好外观的通过发泡的轻质成形制品。