Control device and control method for injection molding machine
US11691323B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 2020 |
| Grant date | Jul 4, 2023 |
| Priority date | — |
| Expiry date | Sep 1, 2041 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2945/76856
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A control device for an injection molding machine including a cylinder into which a resin is supplied and a screw that moves forward and rearward and rotates inside the cylinder, includes a metering control unit that performs metering of the resin inside the cylinder by controlling forward rotation and rearward movement of the screw until the screw has been moved rearward to a predetermined metering position, based on predetermined metering conditions, a rearward movement speed acquisition unit acquiring a rearward movement speed of the screw, a speed determination unit that determines a suck back speed for causing a resin pressure to reach a target pressure, based on the rearward movement speed acquired during metering by the rearward movement speed acquisition unit, and a suck back control unit causing the screw to move further rearward based on the suck back speed, after the screw has reached the predetermined metering position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.