Method for controlling injection in a die casting machine and apparatus for the same
US5988260A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Mar 5, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D17/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for controlling injection in a die casting machine and apparatus for the same capable of producing high-quality die-casting products, which are not produced with fins, even in a high-speed cast or the use of the die with a low precision. A pressurizing controllable valve (21) is a flow adjustable type. A main spool (211) is structured to have a two-way valve (212) with a check-valve function and a position detector (213) for controlling servo, so that the flow of hydraulic fluid charged to a pressurizing cylinder device 20 is not controlled to be switched between ON-OFF but is allowed to adjustably flow, and a pressurizing process is controlled in response to a fin critical curve, thereby fins are previously avoided to be produced, thus producing the high-quality die-casting productions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.