Control device for an injection molding machine
US8882486B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2011 |
| Grant date | Nov 11, 2014 |
| Priority date | — |
| Expiry date | Jun 6, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2945/76936
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
To execute a stable pressure control, in a control device for an injection molding machine, a filling/pressure-keeping determining unit determines whether the injection molding machine is performing a pressure keeping operation, an elastic constant identifier acquires, when the filling/pressure-keeping determining unit determines that the pressure keeping operation is in progress, a pressure detection value and a position detection value as operation information of a motor and identifies an elastic constant K based on the acquired pressure detection value and the position detection value, and a pressure-control control-parameter setting unit calculates a proportional gain Ka of a pressure controller such that a product of the proportional gain Ka of the pressure controller and the elastic constant K is smaller than a speed control bandwidth ωsc of a speed controller, and sets the calculated proportional gain Ka to the pressure controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.