Planetary extruder for thermoplastics material

Details Planetary extruder for thermoplastics material Planetary extruder for thermoplastics material

1980-01-09

1981-05-19

Coe, Philip R.

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

B29B 110

Patent

active

042681766

ABSTRACT:
In a planetary extruder for extruding thermoplastics materials, a threaded main spindle is meshed with and surrounded by threaded planetary spindle. To improve pull-in of material, the planetary spindles are provided in groups, each group comprising at least three spindles. The first planetary spindle of each group corresponds in length to the main spindle and succeeding spindles, considered in an opposite direction to the direction or orbital movement of the planetary spindles, of each group are each shorter than the spindle which immediately precedes it to form receiving spaces for material fed by a feed screw, which receiving spaces in operation are continuously enlarging.
In one embodiment in each group, the spindles which are successively shorter are followed by spindles which are successively longer.

REFERENCES:
patent: 4176967 (1979-12-01), Brinkmann et al.
patent: 4192617 (1980-03-01), Spielhoff

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