Cold slug well of plastic injection molding is divided
into the sprue cold slug well and the runner cold slug well. The cold slug well
location is generally designed in the end of the sprue or the runner.
Cold slug well are mainly in the form of the
bottom with push rod and sprue puller. With a push rod at the bottom of the
slag hole is composed of a push rod and push rod mounted on the rod on the
fixed panel, so it is often used with a push rod or tube release mechanism, as
shown in the figure a, b, c. Another is the bottom of cold slug well formed by
a sprue puller, which pull lever core fixing plate, so it's not exercise with
the ejection mechanism. Its main bodies are spherical and bacteria sprue
puller, as shown in the figure d.
Cold slug well is to gather cold slug to
prevent them into the cavity and affect the quality of plastic parts. It can be
pushed out from the plastic injection mold with the sprue when demoulding. Cold
slug well is to store material flow forwards cold slug. The shape of the sprue
cold slug well are the Z-pin (Fig a), the reverse taper (Fig b), the annular
ring （Fig c）and
the spheral (Fig d). while in the mold opening process to use puller rod or
inverted cone etc will be the main runner material pulled from the sprue
bushing.
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