Method for pressing a plastic, which cures by means of a reaction, into a mould cavity, a pressing auxiliary in pill form to be used in this method and a holder composed of such material
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United States of America Patent
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Jul 11, 1995
Grant Date -
N/A
app pub date -
Jul 20, 1994
filing date -
Jan 23, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Method for pressing a plastic (6), which cures by means of a reaction, from a displacement chamber (4) via at least one injection channel (3) and a gate (2) to a mould cavity (1), said method at least comprising the following steps: pressurising the plastic (6) with an amount of a pressing auxiliary (7) in the displacement chamber (4); pressing the plastic (6) into the mould cavity (1); and allowing the plastic to cure under pressure in the mould cavity, the pressing auxiliary (7) being plastically deformable under the conditions of pressing and the amount thereof being sufficient to be pressed to the vicinity of the gate (2) of the mould cavity (1). Preferably the pressing auxiliary (7) is a thermoplastic.
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