Apparatus for plasticizing and injecting mouldable synthetic material
US3946999A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 30, 1974 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Dec 30, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/51
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Apparatus for plasticizing and injecting mouldable synthetic material is disclosed. The apparatus comprises a cylindrical member having a longitudinal cylindrical bore therein into which such material is introducible, nozzle means firmly secured to one end portion of the cylindrical member and communicating with the cylindrical bore, a worm shaft mounted in the bore to be axially and rotatably displaceable relative to the cylindrical member and provided with an opening of circular cross-section extending longitudinally of the shaft from an end face thereof facing the nozzle means, and a closure body firmly secured to the cylindrical member and projecting into the opening, the closure body providing a seal between the opening and the longitudinal cylindrical bore. Advantageously, the apparatus is provided with valve means disposed at the end portion of the worm shaft which is next adjacent the nozzle means to restrain flow of such material along the cylindrical bore in a direction away from the nozzle means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.