Manufacturing method of different color pellets and manufacturin

Details Manufacturing method of different color pellets and manufacturin Manufacturing method of different color pellets and manufacturin

1997-12-09

2000-02-01

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

With step of cleaning, polishing, or preconditioning...

264140, 264142, 425183, 425185, 425313, B29C 4730, B29B 906

Patent

active

060199164

ABSTRACT:
A first granulating unit A for molding molten resin of one color into pellets and a second granulating unit B for molding molten resin of the other color into pellets are provided in one screw type kneading extruder 1. The first granulating unit A is made to communicate with a discharge port 2a while the second granulating unit B is blocked. After the pellets of one color are molded in this state, the discharge port 2a is made open to the outside of the apparatus, and a thermoplastic resin material of the other color is kneaded and melted by means of the screw type kneading extruder 1, and discharged to the outside of the apparatus to thereby perform cleaning operation. Next, the second granulating unit B is made to communicate with the discharge port 2a while the first granulating unit A is blocked. In this state, the pellets of the other color are molded.

REFERENCES:
patent: 4167384 (1979-09-01), Shirato et al.
patent: 4202659 (1980-05-01), Kinoshita
patent: 5424012 (1995-06-01), Ertle et al.
patent: 5486327 (1996-01-01), Bemis et al.
patent: 5723082 (1998-03-01), Mizuguchi et al.
patent: 5747077 (1998-05-01), Yoshida et al.
patent: 5879720 (1999-03-01), Yoshida et al.

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