Multi-ply molding hot-runner mold

Details Multi-ply molding hot-runner mold Multi-ply molding hot-runner mold

1991-07-12

1993-08-03

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

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

264406, 2643288, 26432814, 425144, 425549, 425570, 425572, 425573, B29C 4516

Patent

active

052327108

ABSTRACT:
The present invention provides a multi-ply molding hot-runner mold including a plurality of nozzle bodies for injecting a plurality of different resin materials to form a multi-ply product. The hot-runner mold comprises a plurality of hot-runner blocks each having a runner for conducting each resin material into the corresponding nozzle body. The hot-runner blocks are stacked one above another with a thermal insulation layer therebetween. Each of the hot-runner blocks includes temperature control means for maintaining the hot-runner blocks at its own molding temperature. Connecting blocks for conducting the resin material from the lower block to the upper block are provided between each adjacent hot-runner block. Between each adjacent hot-runner block there are provided holding members and thermal insulation layers.

REFERENCES:
patent: 4900560 (1990-02-01), Trakas
patent: 4957682 (1990-09-01), Kobayashi et al.
patent: 5030077 (1991-07-01), Orimoto et al.

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