Multi-color lens assembly injection molding process and apparatu

Details Multi-color lens assembly injection molding process and apparatu Multi-color lens assembly injection molding process and apparatu

1997-06-09

1999-03-16

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Composite or multiple layer

264 19, 264 21, 264247, 2642973, 2643288, 4251291, 425576, 425588, 425808, B29D 1100

Patent

active

058825533

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.

REFERENCES:
patent: 3807920 (1974-04-01), Aoki
patent: 4711621 (1987-12-01), Schomblond
patent: 5275764 (1994-01-01), Hettinga
patent: 5320511 (1994-06-01), Woerner
patent: 5413743 (1995-05-01), Prophet
patent: 5494615 (1996-02-01), Wang Lee
patent: 5753151 (1998-05-01), McBride
patent: 5756013 (1998-05-01), Yanagihara et al.

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