Screen/diverter changing mechanism for extruders
US4416605A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1982 |
| Grant date | Nov 22, 1983 |
| Priority date | — |
| Expiry date | May 4, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2793/0027
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In an extruder of the type including an extruding cylinder with an outlet at one end thereof and an extruding screw rotatably disposed in the cylinder and circumferentially formed with a feed flight member for forwarding a plasticized material through the outlet of said cylinder for extrusion through a screen located at the fore end of the extruding cylinder, a screen/diverter changing mechanism including a retainer box fixed to the fore outlet end of the extruding cylinder and internally defining a flow passage of the plasticized material to be extruded; a slide body movable transversely in a guide bore of the retainer box across the flow passage thereof; a screen unit detachably fitted in the slide body and having a screen and a plurality of nozzles; a diverter unit detachably fitted in the slide body and having a diverting flow passage for diverting the flow of the plasticized material from the cylinder; a drive mechanism linked to the slide body for selectively positioning either the screen unit or diverter unit in the flow passage of the retainer box; and a die plate fixedly mounted on the front side of the retainer box and having a plurality of nozzles for extruding the plast…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.