Sprue ejector in automatic injection molding machines
US4787841A · kind A · utility
19Cited by
6References
12Claims
0Family size
Inventor
Key dates
| Filing date | Nov 25, 1987 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Nov 25, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/1759
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for removing the sprue from an injection mold, having a cylinder and an associated piston rod, in which the piston rod extends between the two halves of the mold into the runner when the injection mold is closed. Molding material is molded around the forward end of the piston rod during the injection. Upon opening of the mold the sprue fixedly carried by the forward end is removed by movement of the piston rod into the cylinder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.