Injection mold for laminated article

Details Injection mold for laminated article Injection mold for laminated article

1975-09-30

1977-01-25

Lazarus, Richard B.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

425120, 425248, B29F 105

Patent

active

040048683

ABSTRACT:
To form a laminated plastic article having at least one thermoset layer, a first resin is injected into a mold from a first nozzle and solidified as usual. Then the dies are separated by a predetermined distance to create an additional cavity for a second resin layer on the solidified resin and at the same time provide a fluid passage, which connects the cavity to a second nozzle and is defined and sealed by opposite faces of the dies at their particularly shaped portions. The passage is unsealed by thoroughly separating the dies after injection of a second resin therethrough and solidification of the resin.

REFERENCES:
patent: 3315317 (1967-04-01), Winkler
patent: 3389198 (1968-06-01), Taber
patent: 3751200 (1973-08-01), Borisuck et al.
patent: 3809733 (1974-05-01), Sandiford et al.

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