Multi-color lens assembly injection molding process and apparatus
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United States of America Patent
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Mar 16, 1999
Grant Date -
N/A
app pub date -
Jun 9, 1997
filing date -
Jun 9, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A multi-colored lens assembly is produced in a multi-station injection molding apparatus having non-indexing ejector halves and indexing cover halves. Material is shot on an unexposed illumination side of the lens assembly from valve gated nozzle drops contained in the non-indexing ejector halves thereby producing a viewing side of the lens assembly free of surface blemishes and surface stress defects. Lens assemblies are retained in the indexing cover halves by retention mechanisms provided to overlap peripherally extreme features of the lens assemblies. Lens assemblies are affirmatively released from the non-indexing ejector halves by ejection pins or blades simultaneously with parting of the mold halves.
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Cited Art Landscape
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