Metal mold device for blow molding

Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal... – With heating or cooling means

Reexamination Certificate

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C249S079000

Reexamination Certificate

active

10478456

ABSTRACT:
Fluid flow grooves (11) with a flat cross section being formed between the back surface of a metal mold (2) for blow molding and a back-up member (4) which adheres tightly to this back surface. A plurality of these fluid flow grooves (11) are provided, and these fluid flow grooves are disposed densely in parallel with partition walls (21) interposed between the grooves. Fluid inlets (12) and outlets (13) are formed in the respective fluid flow grooves (11). A heating fluid or cooling fluid enters the respective fluid flow grooves (11) via the inlets (12) from a fluid supply manifold (14). The fluid flows out of the outlets (13), enters a fluid discharge manifold (15), and is discharged to the outside. Rapid heating and rapid cooling of the metal mold (2) are performed, no irregularity occurs in temperature, and the cycle time can be shortened, so that a metal mold device for blow molding in which the energy consumption is small can be obtained.

REFERENCES:
patent: 2326041 (1943-08-01), Lavallee
patent: 3020595 (1962-02-01), Szajna
patent: 3249672 (1966-05-01), Richards et al.
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patent: 3978910 (1976-09-01), Gladwin
patent: 4872827 (1989-10-01), Noda
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patent: 7-214568 (1995-08-01), None
patent: 9-164583 (1997-06-01), None
patent: 10-235722 (1998-09-01), None
Rosato et al, Injection Molding Handbook, 2nd Edition, 1995, p. 668, figure 9-14.
Menig, Mold Making Handbook, 2nd edition, 1998, pp. 117-118.
Rosato et al, Blow Molding Handbook, 1989, pp. 282-285.

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