Method of and apparatus for injection speed control in die-casting machine
US5299626A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 9, 1993 |
| Grant date | Apr 5, 1994 |
| Priority date | — |
| Expiry date | Mar 9, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D17/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An injection speed control valve for controlling the speed of flow of operating fluid from an operating fluid source of the die-casting machine to an injection cylinder, a pressure compensation valve for controlling the pressure of the operating fluid to a predetermined differential valve pressure to be coupled to the injection speed control valve, a bypass duct communicating the operating fluid source and the injection speed control valve, a logic valve for on-off controlling the flow of the operating fluid through the bypass duct, and a solenoid valve for on-off operating the logic valve, are provided. The speed of injection by the injection cylinder is controlled by switching the logic valve with the solenoid valve while maintaining a predetermined opening degree of the injection speed control valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.