Method of and system for operating squeeze plunger in die cast machine
US4932458A · kind A · utility
11Cited by
1References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 25, 1989 |
| Grant date | Jun 12, 1990 |
| Priority date | — |
| Expiry date | Jan 25, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D17/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method of and a system for operating a squeeze plunger in a die cast machine. When the fill-up of molten metal in a cavity is completed by an injection plunger, the moving speed of the injection plunger is rapidly decreased. When the speed at this time becomes lower than a preset value, a preset delay time is measured. After a lapse of this delay time, the squeeze plunger is operated to press a molding material in the cavity, so that plastic flows are caused in the molding material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.