Blow molding method, blow molded product and blow molding mold
    4.
    发明授权
    Blow molding method, blow molded product and blow molding mold 失效
    吹塑法,吹塑制品和吹塑模具

    公开(公告)号:US06759003B1

    公开(公告)日:2004-07-06

    申请号:US09763552

    申请日:2001-02-21

    IPC分类号: B29C4904

    摘要: Blow-molding molds 10 and 20 having parison shutters 31 and 32 for preventing an inflation of the parison 3 toward the outside of the molds 10 and 20 are used in a blow-molding method of the present invention. In other words, a closed space for preventing the parison 3 from inflating out of the molds 10 and 20 are formed by the parison shutters 31 and 32 and a predetermined air is secured in the parison 3 in a frame clamping step (B). In the subsequent mold clamping step (C), the pressure inside the parison 3 starts to be increased when the molds 10 and 20 press the parison 3, so that the parison 3 can be continuously in contact with the die design surface 11. Accordingly, since the parison 3 can be uniformly contracted by cooling, molding failure such as streaks and uneven pattern transfer can be avoided, thus obtaining a blow-molded product having good appearance.

    摘要翻译: 在本发明的吹塑成型方法中使用具有用于防止型坯3朝向模具10和20的外部吹胀的型坯快门31和32的吹塑模具10和20。 换句话说,用于防止型坯3从模具10和20中膨胀的封闭空间由型坯快门31和32形成,并且在框架夹紧步骤(B)中,在型坯3中固定预定空气。 在随后的合模步骤(C)中,当模具10和20挤压型坯3时,型坯3内部的压力开始增加,使得型坯3能够与模具设计表面11连续地接触。因此, 由于型坯3可以通过冷却而均匀地收缩,因此可以避免条纹和图案转印不均匀等成型故障,得到外观美观的吹塑成型品。