The extrudable plastic is a thermoplastic - they melt upon heating and re-solidify upon cooling. Where does the heat of molten plastic come from?
The basic mechanism of extrusion is simple - a screw rotates in the cylinder and pushes the plastic forward. The screw is actually a bevel or slope, wound on the center layer.
Technical characteristics of screw type industrial chillers
The use of mold transfer to the mold to tighten the head, that is, the machine can keep the high-pressure mode-locked but not on the lock. The pressure of the high-pressure lock to the maximum flow
Thread a rectangular, trapezoidal and sawtooth, trapezoidal screw jacks are commonly used. Trapezoidal thread form an isosceles trapezoid-shaped tooth angle α = 30o, internal and external thread trapezoidal thread with tapered snapping easy to loose; its basic tooth shape according to GB / T5796.1-2005 requirements. The self-locking jack line can better, so with a single thread. Therefore, the choice of screw threads are tooth-shaped angle α = 30o singlet trapezoidal thread.