High speed clamp system for an injection molding machine
US9333691B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2015 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Nov 13, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/1747
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A clamp assembly for an injection molding machine includes: (a) a cylinder housing having an inner end and an outer end spaced axially apart from the inner end; (b) a piston assembly comprising a tie bar end portion of a tie bar and a piston head affixed to the tie bar end portion, the piston assembly slidable within the housing between a meshing position and a clamped position spaced axially apart from the meshing position; (c) a clamp chamber between the piston head and the inner end of the cylinder housing for holding pressurized fluid and urging the piston assembly to the clamped position when pressurized; and (d) a spring return device adjacent the outer end of the cylinder housing, the spring return device pushing the piston assembly from the clamped position back to the meshing position when pressure in the clamp chamber is relieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.