Method of controlling mold pressure pin for press casting machine
US5161598A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1991 |
| Grant date | Nov 10, 1992 |
| Priority date | — |
| Expiry date | Sep 3, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D27/11
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In a press casting machine a molten material enclosed in a cavity of a mold is squeezed by a pressure pin, the pressure pin is controlled by automatically controlling the start timing thereof. Namely, an optimum stroke of the pressure pin is preliminarily set and an actual stroke thereof is detected. The detected stroke of the pressure pin is compared with the optimum stroke thereof and a start timing of the pressure pin is corrected or modified so that the stroke thereof is made optimum. When the detected stroke of the pressure pin is smaller than the set stroke thereof, the start timing of the pressure pin is corrected so that a timing for starting the pressure pin advances and, on the contrary, when the detected stroke of the pressure pin is larger than the set stroke thereof, the start timing of the pressure pin is corrected so that a timing for starting the pressure pin is delayed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.