Means for improving the uniformity-performance of cold feed rubber-extruders
US4957372A · kind A · utility
7Cited by
6References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 29, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Aug 29, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2021/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The increasingly high standards of consistency and uniformity demanded of cold feed rubber extruders are met by providing notches in the flights of the screw at least in the feed-inlet of the extruder. The notches are at a lead-angle greater than that of the extruder screw flights, so to pull the rubber and advance it positively. Throttling means are used to adjust the amount of squash-back and there is an independently variable-speed drive for a feed roller in the feed inlet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.