发明授权
- 专利标题: Adaptive process control for injection molding
- 专利标题(中): 注塑成型的自适应工艺控制
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申请号: US258652申请日: 1988-10-17
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公开(公告)号: US4850217A公开(公告)日: 1989-07-25
- 发明人: Robert E. Nunn
- 申请人: Robert E. Nunn
- 申请人地址: OH Mount Gilead
- 专利权人: HPM Corporation
- 当前专利权人: HPM Corporation
- 当前专利权人地址: OH Mount Gilead
- 主分类号: B29C45/76
- IPC分类号: B29C45/76
摘要:
An injection molding machine is utilized to develop PVT constants for a given material by pressurizing the material in the barrel against the blocked outlet nozzle, measuring the volume during pressurization, and then weighing the pressurized shot after it is purged from the barrel in order to calculate the specific volume of the material. Plotting specific volume against a variety of pressure and temperature values produces a plot of PVT relationships from which the constants can be derived.