Plastic and nonmetallic article shaping or treating: processes – Recycling of reclaimed or purified process material – Of gaseous process material
Patent
1994-06-20
1996-05-07
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
Recycling of reclaimed or purified process material
Of gaseous process material
264 406, 264237, 2642972, 2643288, 26432814, 264336, 264348, 425547, B29C 4572
Patent
active
055143091
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
patent: 5232641 (1993-08-01), Williamson et al.
Jerbic Michael J.
Williamson James T.
Heitbrink Jill L.
Rapid Cool Corporation
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