Pipe molding apparatus with mold tunnel air turbulence

Details Pipe molding apparatus with mold tunnel air turbulence Pipe molding apparatus with mold tunnel air turbulence

2007-09-11

2007-09-11

Davis, Robert (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

C425S326100, C425S336000, C425S369000, C425S384000, C425S392000, C425S396000

Reexamination Certificate

active

10534739

ABSTRACT:
An extruding apparatus which extrudes continuous length of hollow plastic product has an extruder (3) which feeds molten plastic through die equipment (5) to a mold tunnel (7) formed by side by side moving mold blocks (9). The apparatus includes air turbulence internally of the product within the mold tunnel to assist in setting shape of the product. The air turbulence is provided by an air moving member (17) located internally of the product within the mold tunnel and a power source for the air moving member. The power source is located externally of the mold tunnel and a power transfer is provided to feed power from the power source through the die equipment to the air moving member without cooling of the die equipment.

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patent: 5525289 (1996-06-01), Lupke et al.
patent: 6551534 (2003-04-01), Kirjavainen et al.

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