Filling step control method of injection molding machine
US6616871B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2000 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Jul 31, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2945/76939
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A filling step control method of an injection molding machine for filling a molten resin into a die cavity is provided. The control method has the steps of: sampling in initiating the filling step for filling the molten resin into the die cavity by controlling an injection speed and, thereafter, by controlling a filling pressure while not exceeding a predetermined value; storing the injection speed over an entire filling process when a quality product can be stably obtained during the sampling step into a storage medium as a reference waveform; and after storing the reference waveform, molding for filling the molten resin into the die cavity by controlling the injection speed to follow the reference waveform over the entire filling step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.