Mixing apparatus for multi-component plastics, especially polyur

Details Mixing apparatus for multi-component plastics, especially polyur Mixing apparatus for multi-component plastics, especially polyur

1983-03-23

1984-12-04

Jenkins, Robert W.

Agitating

Having specified feed means

Including specific structure for controlling flow through...

366189, 366192, 366195, 366196, B01F 716, B01F 1502

Patent

active

044861028

ABSTRACT:
A mixing head for multicomponent plastics, especially polyurethane, in whose mixing chamber (2) a hollow piston (7) can be moved to and fro to control the component streams. The hollow piston contains an expulsion piston (8), which is movable independently of the hollow piston, and which can be passed through an outlet tube (3) which adjoins the outlet orifice (4). The end face (12) of the hollow piston forms, together with the mixing chamber wall (11) nearest the sprue, a shearing gap in which the components are mixed. As a result of the design and arrangement of the pistons (7) and (8), good mixing is achievable even under critical conditions, and the mixing chamber is also easily cleaned.

REFERENCES:
patent: 2995346 (1961-08-01), Samples
patent: 3189325 (1965-06-01), Levy
patent: 4313909 (1982-02-01), Boden et al.

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