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MARBLEIZING UNITS:
Although most injection molding processes require optimum mixing of the melt
when color additives are involved, some applications require that colors not be
mixed. Instead, a marble-like appearance is desired to produce an artistic
effect, frequently used in cosmetics, toys, sporting goods and housewares.
A marbleized effect can be produced using a plunger machine and some have used a
specially designed screw and valve in their existing molding machines. We
believe the most reliable method of marbleizing involves a special screw, a
"torpedo" device and a specially designed valve and end cap. These
essential components are:
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Short L/D Screw which feeds and conveys the
resin downstream without fully melting.
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"Lawson" type valve which allows the free flow
of the partially melted resin through it without any mixing effect.
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A "torpedo" devise that achieves a final
shearing and melting of the resin without any mixing. The torpedo is held
in place by a specially designed end-cap.
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An end-cap that is designed to accommodate the
torpedo and hold it in place.
Marbleizing units using the
described components have been used to successfully mold products made from SAN,
PS, PP, K resin and cellulosics. Below are some sample parts molded using
our marbleizing components.
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