Mixing and kneading machine and method of implementing...

Details Mixing and kneading machine and method of implementing... Mixing and kneading machine and method of implementing...

2011-03-22

2011-03-22

Cooley, Charles E (Department: 1774)

Agitating

Rubber or heavy plastic working

Rotating and reciprocating stirrer

C366S080000, C366S090000, C366S289000, C366S322000

Reexamination Certificate

active

07909500

ABSTRACT:
A mixing and kneading machine (1) for continual compounding comprises a screw shaft (3) rotating in a casing2and simultaneously moving axially translationally. To sustainably enhance the efficiency of the machine as regards its material thruput per unit of time a screw shaft is proposed having the following geometric ratios:Da/Di=1.5 to 2.0, i.e. the ratio of screw shaft outer diameter Da to screw shaft inner diameter Di is 1.5 to 2.0,Da/H=4 to 6, i.e. the ratio of screw shaft outer diameter Da to stroke H is between 4 and 6,T/H=1.3 to 2.5, i.e. the ratio of pitch T to stroke H is between 1.3 and 2.5.The mixing and kneading machine (1) provided with such a screw shaft (3) is operated preferably at a rotational speed exceeding 500 rpm, particularly exceeding 800 rpm.

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