Injection molding machine
US6068810A · kind A · utility
6Cited by
8References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1998 |
| Grant date | May 30, 2000 |
| Priority date | — |
| Expiry date | Sep 25, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/5008
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plasticizing unit having a plasticizing screw, an injection piston connected to the screw, a quill connected to the piston, and hydraulic cavity formed by the piston and a quill end face. Hydraulic fluid is transferred to the hydraulic cavity to move the piston and screw away from the quill. The screw and piston are subsequently moved towards the quill to displace hydraulic fluid out of the hydraulic cavity and cause back pressure. The back pressure is counteracted by acting on the back of the quill.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.