Squeeze pin circuit for die casting and hydraulic unit
US9707619B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2015 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Mar 30, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D17/203
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A squeeze pin circuit is installed to a direction switching valve. The direction switching valve is configured to switch a direction of hydraulic pressure to a core cylinder. The squeeze pin circuit is configured to drive a squeeze pin. The squeeze pin is configured to partially pressurize molten metal filled in a cavity. The squeeze pin circuit includes a squeeze pin cylinder and a flow rate adjusting unit. The squeeze pin cylinder is coupled to the direction switching valve to drive the squeeze pin. The flow rate adjusting unit is installed on a hydraulic pressure path. The hydraulic pressure path couples the direction switching valve to a head side of the squeeze pin cylinder. The flow rate adjusting unit is configured to ensure pressure compensation and temperature compensation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.