Injection moulding plastic components with a slit
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United States of America Patent
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Jul 7, 2015
Grant Date -
Nov 20, 2014
app pub date -
Aug 5, 2014
filing date -
Jul 28, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
A method of injection molding a plastics component includes providing a first mold member with a mold cavity, which is defined by an internal surface, and a second mold member with an external surface whose shape is complementary to the shape of the mold cavity. Either the internal surface or the external surface carry an elongate formation with an elongate apex. The method includes advancing the second mold member into the mold cavity such that the apex is spaced from the opposed one of the internal surface and the external surface by a predetermined distance and the internal surface of the first mold member and the external surface of the second mold member together define a mold space. Molten polyolefin material is then injected into the mold space to substantially fill it. The predetermined distance is so dimensioned that the polyolefin material does not completely fill the space between the apex and the opposed surface and the slit is thus formed.
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