Core pin cooling for high speed injection molding apparatus

Details Core pin cooling for high speed injection molding apparatus Core pin cooling for high speed injection molding apparatus

1979-12-03

1980-12-09

Flint, Jr., J. Howard

Static molds

Including means within surface to confine heat exchange medium

249 59, 249 63, B29C 100, B29F 114, B29D 1500

Patent

active

042381061

ABSTRACT:
The invention provides an improved cooling arrangement for the core pin of a commercially available injection molding machine permitting a significant reduction in the cycle time of such machine. The core pin is fabricated by the assembly of a plurality of concentric sleeve-like members, one of which is provided with six parallel helically disposed external grooves which respectively define three parallel passages for cooling fluid inlet and three parallel outlet passages for the heated fluid. The arrangement provides a significant increase in the quantity of cooling fluid flowing through the core pin, hence permits a significant decrease in cycle time of the injection molding machine.

REFERENCES:
patent: 2688159 (1954-09-01), Swartz et al.
patent: 2900666 (1959-08-01), Marcus
patent: 3482815 (1969-12-01), Naturale
patent: 3497173 (1970-02-01), Valyi
patent: 3737277 (1973-06-01), Uhlig
patent: 3774874 (1973-11-01), Clark
patent: 4019711 (1977-04-01), Altenhof et al.
patent: 4126291 (1978-11-01), Gilbert et al.
patent: 4130264 (1978-12-01), Schroer

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