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without significant loss of properties, since the skin, which can be made of virgin
material, dominates properties and appearance.
Liquid injection moulding:
Process that involves an integrated system for proportioning, mixing, and
dispensing dual-component liquid resin formulations and directly injecting the
resultant mix into a mould which is clamped under pressure.
2-Shot Injection Moulding:
This technology produces a part with two different raw materials or colors in a single
operation. The machine has two injection units: one vertical and one horizontal. By
using a rotating mould, the machine automatically produces a substrate of one resin
or colour and over moulds the part with the second resin or colour.
Gas Assist Injection Moulding:
Gas assisted moulding involves the introduction of nitrogen under pressure to the
mould cavity after a partial or full injection of polymer melt into the mould cavity.
This process is thus capable of producing hollow rigid parts, free of sink marks.
The hollowing out of thick sections of mouldings results in stiffer part with reduction
in weight, saving of resin material, shorter cooling cycles, reduced clamp force
Gas
Resin Injection Injection of gas, pressure
holding, cooling
Gas
Opening of mold and Gas release
removal of molding
tonnage and part consolidation. The gas channels thus formed also effectively
support the flow of resin, allowing the moulding pressure to be greatly reduced,
which in turn reduces internal stresses and warpage while allows uniform mould
shrinkage.
Fusible core injection moulding:
Fusible core injection moulding is a specialized plastic injection moulding process. It
is used in the manufacture of moulded components with cavities or undercuts, which
would not be possible with tools having demouldable cores.
DAVE TECHNICAL SERVICES 95