Method of producing compound pellets containing wood flour

Details Method of producing compound pellets containing wood flour Method of producing compound pellets containing wood flour

1998-08-14

2000-11-07

Nutter, Nathan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524 14, C08L 8900

Patent

active

061438111

ABSTRACT:
While resin forming material and hygroscopic wood flour or wood flour containing water, which were fed to the feed port 23 of the intermeshing type two screw type screw side feeder 20, are being conveyed toward the intermeshing type twin screw extruder 1, they are somewhat kneaded and then introduced into the intermeshing type twin screw extruder 1. Resin forming material and hygroscopic wood flour or wood flour containing water, which have been introduced into the intermeshing type twin screw extruder 1, are melted and kneaded by the heat transmitted from the heating cylinder 2 and also by the heat generated in the process of shearing conducted by the rotating screws 3a, 3b. After that, they are extruded from the die 9 in the form of strands. Moisture and gas composed of volatile components generated in the process of melting and kneading are sucked by vacuum from the rear vent 6a arranged on the upstream side of the introducing port 5 and also sucked by vacuum from the vents 6b, 6c arranged on the downstream side of the introducing port 5, so that they can be discharged outside the apparatus.

REFERENCES:
patent: 3894981 (1975-07-01), Kluglikov et al.
patent: 4203876 (1980-05-01), Dereppe et al.

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