Injection molding machine
US4735564A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1987 |
| Grant date | Apr 5, 1988 |
| Priority date | — |
| Expiry date | Jun 17, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45244
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An injection molding machine generally comprises a heating cylinder, a screw rotated and reciprocated in the heating cylinder and a screw drive system. The screw drive system comprises two motors and two sensors connected respectively thereto which are automatically controlled by a control system in connection with a screw revolution number and a screw back pressure, or independently so as to accurately carry out the resin measuring process. The control system performs an adaptive control of a motion control system inclusive of the screw and the screw drive system in response to a screw speed instruction, a screw revolution number feedback signal, and a screw position feedback signal in accordance with various control modes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.