Plastic article or earthenware shaping or treating: apparatus – Control means responsive to or actuated by means sensing or... – Temperature control
Patent
1993-07-21
1994-08-16
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Control means responsive to or actuated by means sensing or...
Temperature control
264 406, 264237, 26432814, 264336, 425144, 425547, 425548, B29C 4572
Patent
active
053381726
ABSTRACT:
Rapid cooling of molded workpieces such as PET parisons formed in an injection molding machine is provided by a receiver receiving molded workpieces upon ejection from the molding machine, the receiver being transported out of the molding machine to an adjacent position where a cooling head coupled to a source of cooling fluid such as liquid nitrogen directs the fluid toward the surfaces of each workpiece. The cooling head engages and is sealed to the receiver to inhibit the escape of cooling fluid into the atmosphere thereby reducing cost, environmental impact, etc. A cooling program control coupled to the cooling fluid source supplies a discontinuous flow cooling fluid from said source to contact the workpieces only when the cooling head is engaged with and sealed to the receiver. A vacuum unit withdraws cooling fluid from the receiver subsequent to contact between the workpieces and the cooling fluid. The cooling fluid can then recooled and recycled for reuse.
REFERENCES:
patent: 4472131 (1984-09-01), Ryder
patent: 4592719 (1986-06-01), Bellehache et al.
patent: 4690633 (1987-09-01), Schad et al.
patent: 4721452 (1988-01-01), Delfer, III
Jerbic Michael J.
Williamson James T.
Heitbrink Tim
Rapid Cool Corporation
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