Plastic and nonmetallic article shaping or treating: processes – Random variegated coloring during molding – By extrusion
Patent
1978-10-16
1981-03-31
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Random variegated coloring during molding
By extrusion
264174, 264211, 425 97, 425130, 425197, 425462, 425376B, B29F 312, B32B 300
Patent
active
042592771
ABSTRACT:
This invention provides a method and apparatus for injecting an additive into a stream of homogenized plastics material. The apparatus includes a homogenizing means such as a screw conveyor for the plastics material and at least one injector for injecting an additive, usually a colorant, into the boundary layer only of the homogenized plastics material prior to the latter being subjected to mastication in a gear pump. The additive is injected into the plastics material at such a position in the boundary layer that as the material passes through the gear pump the additive is mixed substantially wholly with the boundary layer of plastics material and for this purpose the injection of additive is at a position such that it passes through the gear pump in the region of the intermeshing gears of the pump.
REFERENCES:
patent: 2174779 (1939-10-01), Delorme
patent: 2479261 (1949-08-01), Reetz
patent: 2573050 (1951-10-01), Orsini
patent: 2805465 (1957-09-01), Miller
patent: 2815033 (1957-12-01), Braunlich
patent: 3272901 (1966-09-01), Sims
patent: 3706825 (1972-12-01), Hall et al.
patent: 3726955 (1973-04-01), Hughes et al.
patent: 3920366 (1975-11-01), Randall
patent: 3930782 (1976-01-01), Bigland
patent: 4128386 (1978-12-01), Wissinger et al.
The General Engineering Company (Radcliffe) Limited
Woo Jay H.
LandOfFree
Method and apparatus for the injection of additives into plastic does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for the injection of additives into plastic, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for the injection of additives into plastic will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2242599