Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to heat or cool
Patent
1997-02-14
1999-11-16
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means to heat or cool
26432814, 425552, 425556, B29C 4578
Patent
active
059846607
ABSTRACT:
The usual practice when molding thermoplastic sheets is to form the sheets in a closed mold and leave the sheets in the mold until the sheets have cured sufficiently for removal and further processing or shipping. The sheet cooling or curing step is the longest step in the molding operation. In order to speed up the process, it is advantageous to remove the plastic sheet from the mold for cooling the sheet at a location separate from the mold. The present invention provides a simple sheet cooling apparatus, which is similar to a mold, including a lower cooling clamp fixed in a frame, an upper cooling clamp movably mounted in the frame for movement between an open position in which the clamps are spaced apart for receiving a plastic sheet, and a closed position in which the sheet is sandwiched between the upper and lower clamps, a manifold at one end of each clamp for introducing cooling water into both clamps and a second manifold at the other end of each clamp for discharging the cooling water. The invention also provides a transfer mechanism for simultaneously removing a first sheet from the mold and a second sheet from the cooling clamp for further processing or shipping.
REFERENCES:
patent: 3914104 (1975-10-01), Dean et al.
patent: 4005967 (1977-02-01), Ayres et al.
patent: 4055033 (1977-10-01), Garrett
patent: 4462786 (1984-07-01), Perryman
patent: 4676944 (1987-06-01), Korb et al.
patent: 4929164 (1990-05-01), Duina
Heitbrink Tim
Otron Tech Inc.
Seaby George A.
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