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公开(公告)号:US4159293A
公开(公告)日:1979-06-26
申请号:US860051
申请日:1977-12-13
IPC分类号: B29C49/00 , B29B7/00 , B29B11/10 , B29C47/00 , B29C47/50 , B29C47/92 , B29C49/04 , B29C49/78 , B29C65/00 , G05B19/08 , B29F3/00
CPC分类号: B29C47/368 , B29C47/0023 , B29C47/92 , B29C49/04 , B29C49/78 , G05B19/08 , B29C2947/92076 , B29C2947/92304 , B29C2947/92428 , B29C2947/92466 , B29C2947/92638 , B29C2947/92647 , B29C2947/92904 , B29C2947/92961 , B29C47/0026
摘要: A parison length controller for molding parisons having a predetermined length and a uniform wall thickness distribution over the whole length. A parison lower edge detector is provided for generating the parison lower edge signal when a parison is extruded to a predetermined length, and a parison controller generates the extrusion end signal every time when an extrusion plunger reaches the end of the extrusion stroke. Depending upon whether the parison lower edge signal or the extrusion end signal occurs first, a positive or negative voltage signal of a predetermined magnitude is generated, and the positive and negative voltage signals are accumulated and stored and used as a wall thickness correction signal for forming a parison having a predetermined length.
摘要翻译: 一种型坯长度控制器,用于在整个长度上成型具有预定长度和均匀壁厚分布的型坯。 提供型坯下边缘检测器,用于当型坯被挤出至预定长度时产生型坯下边缘信号,并且型坯控制器在每当挤压柱塞到达挤压冲程结束时产生挤出端信号。 根据型坯下边缘信号或挤出端信号是否首先出现,产生预定幅度的正或负电压信号,并将积极和存储正,负电压信号作为形成壁厚校正信号 具有预定长度的型坯。