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    • 9. 发明申请
    • PROCESS AT AN INJECTION MOULDING OF PARTS WITH HOLLOW PROFILES
    • 在具有中空轮廓的部件注射成型过程中
    • WO1998019848A1
    • 1998-05-14
    • PCT/SE1997001742
    • 1997-10-17
    • PERSTORP ABÅBERG, Anders
    • PERSTORP AB
    • B29C45/56
    • B29C45/7613B29C45/1705B29C45/1732
    • Process where a part made of thermoplastic resin is manufactured. The mould (1) is provided with at least one material inlet (4), at least one fluid channel (10) and at least one moveable mould member (2). The mould (1) is further provided with at least one pressure sensor (5). The injection moulding process is initiated by reducing the volume of the mould cavity, whereby an amount of molten thermoplastic resin is injected. A skin is allowed to form in the resin. The pressurised fluid is introduced into the molten resin, forming a fluid cavity (11). The fluid exerts a pressure towards the walls of the mould cavity (3). This pressure is detected by the pressure sensor (5), which guides the movement of the moveable mould member (2). The volume of the mould cavity (3) increases while the fluid is allowed to flow into the growing fluid cavity (11). The resin is allowed to solidify further while the fluid pressure is maintained.
    • 制造由热塑性树脂制成的部件的工艺。 模具(1)设置有至少一个材料入口(4),至少一个流体通道(10)和至少一个可移动模具构件(2)。 模具(1)还设置有至少一个压力传感器(5)。 通过减小模腔的体积来开始注射成型过程,由此注入一定量的熔融热塑性树脂。 在树脂中形成皮肤。 将加压流体引入熔融树脂中,形成流体腔(11)。 流体向模腔(3)的壁施加压力。 该压力由压力传感器(5)检测,压力传感器(5)引导可动模具(2)的移动。 当流体被允许流入生长流体腔(11)时,模腔(3)的体积增加。 在保持流体压力的同时使树脂进一步固化。