First, a gum rubber was allowed to plasticate
for two minutes, then NaOH was added to mix with EVM lot two minutes, followed by the addition of MAA and mixed for another six minutes.
Intermittent extrusion Intermittent extrusion involves using either a reciprocating screw machine or a conventional extruder to plasticate
the TPE pellets and move the plasticated polymer into the front of the barrel of the retracting reciprocating screw or into an accumulator.
Twinshot uses a special screw and barrel that plasticate
two materials separately.
Conventional screws may not have enough time to plasticate
pellets at the back of the screw into uniformly melted polymer at the front, leading to unmelt.
screw designed to plasticate
larger volumes of thermoset resins is new from KraussMaffei Corp.
For example, using ultrasonic vibration to plasticate
melt for micromolding.
5 oz/sec of PE and plasticate
1500 lb/hr of PE or 1100 lb/hr of PP.
It is a special two-stage system that uses an extruder with a fixed screw to plasticate
polymer, and then a separate specially designed ram system to inject the material.
Use the entire cooling time to plasticate
the next shot.
With the right resins, says Guergov, you can blend the two kinds of pellets in one hopper, then plasticate
and inject them together in the same barrel, and finally achieve complete encapsulation of one material by the other in the mold, just as with coinjection.
It starts with an extra reciprocating-screw unit mounted above the main injection unit that plasticates
unfilled resin and feeds it to a proprietary cylindrical chamber called an entrainment die.