Question

In modern injection molding units, why is a reciprocating screw used instead of a plunger? Give 3 reasons how this advantage is achieved.

Answer 1

The most significant advantage of the reciprocating screw over the plunger was the screw's improved ability to heat and mix the resin. ... For the first time, screw plasticating delivered a homogenous melt with close temperature control and uniform viscosity, resulting in up to 50% faster production rates than plungers.