Injection Molding Process for Making Laboratory Test-Tubes and Mold to Be Used in the Molding Process Thereof
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United States of America Patent
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Issued Date -
Oct 30, 2008
app pub date -
Apr 4, 2006
filing date -
Apr 6, 2005
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
Plastic material is injected into a chamber defined between a female mold member and a male mold member, while air is evacuated from the chamber. In the evacuation step, the air contained in the forming chamber progressively exits from the mold under the pressure of the melted plastic material through a multiplicity of slits made on the female element at different heights along the above-mentioned central axis. The slits have dimensions such as to allow the passage of the air and at the same time to block the flow of the melted plastic material from the forming chamber.
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Family
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