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screw speed
a, screw rotation speed directly affects the plastic shear in the screw slot;
b, small screw groove shallow absorption heat quickly enough to promote plastic softening in compression time, the screw and barrel wall of the lower heat of friction, suitable for high-speed rotation, increased plasticizing capability;
c, large screw rotation is not fast, so as not to cause excessive friction plastics and uneven heat;
d, the higher the heat-sensitive plastic, screw speed too much, then, the plastic can easily break down;
e, usually of a certain size screw speed range, the general speed of 100 \ '150rpm; too low you can not melt the plastic, too much plastic will be burned.
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