Injection moulding worm screw - provided at front end with mixing attachment to accelerate plasticising

摘要

Injection moulding machine whose output is increased by accelerating the plasticising of the thermoplastics material has the front section of the rotary and axially slidable worm screw provided with an auxiliary mixing device formed by a diametrally reduced worm screw section furnished with peripheral, axially spaced rows of teeth and a bushing surrounding the section and provided with radially inwardly directed teeth which are disposed with axial clearance between the spaced rows of teeth.