Apparatus for producing particles of thermoplastic material
US4954352A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1988 |
| Grant date | Sep 4, 1990 |
| Priority date | — |
| Expiry date | Aug 9, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/364
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In an apparatus for producing particles of thermoplastic material by extruding material in a plastic state through orifices in a die plate and thereafter cutting the extruded plastic material into crumb upon exit from the orifices, an air supply is coupled to a cutting chamber for providing a stream of air across the face of the die plate to cut and convey the crumb away from the orifices. The cutting chamber is arranged to include a restricted throat having an exit area in close proximity to the orifices and a further portion for providing an accumulation zone adjacent the orifices, the accumulation zone having a cross-sectional area which increases from the exit area of the throat to a product discharge zone remote from the orifices in a downstream direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.