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Improved post mold preform cooling with annular air jet streams

IP.com Disclosure Number: IPCOM000008069D
Publication Date: 2002-May-15
Document File: 4 page(s) / 466K

Publishing Venue

The IP.com Prior Art Database

Abstract

This invention broadly relates to in-situ cooling of an injection molded article using annular air jet streams. In particular, this invention relates to in-situ cooling of a preform on a mold core using annular air jet streams; preforms are used to produce blow-molded bottles. The use of annular air jet streams lengthens the effective jet stream and thereby causes the air stream to stay attached to the preform longer thereby removing more heat from the preform while cooling on cores outside of the mold.

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Field of the Invention

       This invention broadly relates to in-situ cooling of
an injection molded article using annular air jet streams. In
particular, this invention relates to in-situ cooling of a
preform on a mold core using annular air jet streams; preforms
are used to produce blow-molded bottles.

Summary of the Prior Art

       US 6299804 to Brand et al. teaches an application of
air amplifier technology for the in-situ cooling of preforms on
a molding core. Teaching includes description of annular
apparatus through which compressed air flows and in so doing
causes a greater flow of ambient air to pass through the device.

       An alternate approach to in-situ preform cooling is to
generate air jet streams from a matrix of tubes fed by a common
air plenum. Known problems with the plenum approach include:
uneven cooling effect; it is difficult to cool the body of the
preform as effectively as the dome because the air stream
separates from the surface of the preform and because the jet
stream disperses quickly.

Summary of the Invention

       The primary objective of the invention is an
improvement in the in-situ cooling of a preform through the use
of annular air jet streams. The use of annular air jet streams
lengthens the effective jet stream and thereby causes the air
stream to stay attached to the preform longer thereby removing
more heat from the preform while cooling on cores outside of the
mold.

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An advantage of improved in-situ cooling may be found
in faster c...