Injection apparatus for a die casting machine
US5622217A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1995 |
| Grant date | Apr 22, 1997 |
| Priority date | — |
| Expiry date | Sep 14, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D17/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Operation can be switched from low- or high-speed injection process to intensified-pressure injection process by using only one accumulator, and an injection cylinder is composed of a single-acting cylinder, so that the space can be saved, and intensified-pressure surge can be reduced. A coaxial small-diameter portion is formed on the pressure surface side of a piston of the accumulator, a hydraulic oil discharge passage having an inside diameter corresponding to the outside diameter of the small-diameter portion is provided coaxial with the piston, and a passage is provided for guiding intensified-pressure oil in a cylinder chamber of the accumulator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.