Screw extruder for thermoplastics synthetic materials or elastom

Details Screw extruder for thermoplastics synthetic materials or elastom Screw extruder for thermoplastics synthetic materials or elastom

1976-12-08

1977-10-04

Jenkins, Robert W.

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

366 88, B29B 106

Patent

active

040520382

ABSTRACT:
A screw extruder for thermoplastics synthetic materials or elastomers having a screw rotating in a cylinder wherein the screw has a mixing part having a plurality of first grooves at an upstream position thereof inclined in the direction of feed, a plurality of second grooves at a position downstream of the first grooves and also inclined in the direction of feed and a grooveless portion between said first grooves and said second grooves, and the cylinder has a mixing part which surrounds said grooveless portion of the mixing part of the screw and has third grooves therein which extend axially or are inclined in the direction of feed, the number of said first grooves, said third grooves and said second grooves differing. Preferably the number of grooves diminishes in the feed direction that is to say the number of said first grooves exceeds the number of said third grooves and the number of said third grooves exceeds the number of said second grooves. The transitions of said third grooves to the cylinder bore are preferably gradual transitions.

REFERENCES:
patent: 3045283 (1962-07-01), Keiser
patent: 3788612 (1974-01-01), Dray
patent: 3957256 (1976-05-01), Murakami
patent: 4007922 (1977-02-01), Tamura

Affiliated with

Also associated with

Rating

Screw extruder for thermoplastics synthetic materials or elastom does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Screw extruder for thermoplastics synthetic materials or elastom, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Screw extruder for thermoplastics synthetic materials or elastom will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1771708