Method of making a lamp assembly

Details Method of making a lamp assembly Method of making a lamp assembly

1993-05-20

1995-05-09

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, 264255, 2642973, 264310, 2643288, 362 61, 425808, B29D 1100

Patent

active

054137438

ABSTRACT:
A lamp assembly having a plastic housing and a plastic lens is molded in a rotary transfer molding machine having upper and lower mateable housing dies and upper and lower mateable lens dies in which the housing and the lens are molded simultaneously. The machine is then indexed so that the upper housing die with the molded housing retained in it is mated with the lower lens die with the molded lens retained in it. These two dies are configured so that an annular seal bead cavity is formed at an interface of the dies. A seal bead is then molded to join the molded housing to the molded lens to provide the lamp assembly. The machine is then indexed again so that the upper housing die with the lamp assembly retained in it is mated with an overlay die and a decorative overlay is molded on the peripheral margin of the lens.

REFERENCES:
patent: 3702750 (1972-11-01), Veneria
patent: 3766373 (1973-10-01), Hedgewick
patent: 3807920 (1974-04-01), Aoki
patent: 4670199 (1987-06-01), Montet et al.
patent: 4744741 (1988-05-01), Glover et al.
patent: 4812955 (1989-03-01), Beswick et al.
patent: 4839629 (1989-06-01), Brown
patent: 4885121 (1989-12-01), Patel
patent: 5221538 (1993-06-01), Gasami et al.
patent: 5275764 (1994-01-01), Hettinga
"Technoscope" article, Modern Plastics, May 1992, p. 35.

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