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1. 发明授权

US06645405B2 Weighing method in prepla type injection molding machine 失效
标题翻译：在prepla型注塑机中的称重方法
公开(公告)号：US06645405B2
公开(公告)日：2003-11-11
申请号：US09883706
申请日：2001-06-18
申请人： Hisato Shimizu , Hiroshi Koizumi , Kazutoyo Kobayashi
发明人： Hisato Shimizu , Hiroshi Koizumi , Kazutoyo Kobayashi
IPC分类号： B29C4577
CPC分类号： B29C45/54 , B29C2045/548
摘要： An unstable weighing due to the plunger sliding resistance in a prepla type injection molding machine is prevented by dividing control of the plunger retraction movement for the weighing into speed control and pressure control. A plastic resin supply start position and a forced retraction release position are set along the way of the plunger retraction stroke by reference to a weighing start position. A plunger is moved from the weighing start position after injection and pressure-keeping to a weighing stop retraction position. Plastic resin is supplied to the forward portion of the injection cylinder when the plunger attains the supply start position from the weighing start position. The plunger is moved by forced retraction up to the forced retraction release position by speed control; the weighing is stabilized by changing the speed control to the pressure control once the plunger attains the forced retraction release position.
摘要翻译：通过将用于称重的柱塞缩回运动的控制分成速度控制和压力控制来防止由于预成型注塑机中的柱塞滑动阻力导致的不稳定称重。通过参考称重开始位置沿塑料树脂供给开始位置和强制退回释放位置沿柱塞退回行程的方式设置。柱塞在注射和压力保持之后从称重起始位置移动到称重停止缩回位置。当柱塞从称重开始位置到达供给开始位置时，将塑料树脂供给到注射缸的前部。柱塞通过强制退回移动到强制退回释放位置，通过速度控制; 一旦柱塞达到强制退回释放位置，通过将速度控制改变为压力控制来使称重稳定。

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