Method and apparatus for the injection moulding of plastics articles
US4522778A · kind A · utility
10Cited by
10References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 27, 1984 |
| Grant date | Jun 11, 1985 |
| Priority date | — |
| Expiry date | Apr 27, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/564
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for the production of parts made from plastics material using an injection press in which the mould cavity is defined by a mould surface Sca and the surface Sve of a movable piston. Firstly, the material is introduced into the mould cavity and during injection, the piston is kept stationary for a time to form a rough mould and then retracted to form a parison. Secondly, after injection has been completed the piston is advanced again, and maintained in position while cooling takes place. Thirdly, the mould is opened and the part ejected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.