Plastic and nonmetallic article shaping or treating: processes – With printing or coating of workpiece – Anti-stick or adhesion preventing coating
Patent
1976-05-13
1978-05-09
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
With printing or coating of workpiece
Anti-stick or adhesion preventing coating
264131, 264213, 264300, B29D 724, B29D 702
Patent
active
040887278
ABSTRACT:
Process and apparatus for solidifying molten materials by pouring onto a substrate and cooling, in which undesired crystallinity is avoided by first forming a solidified protective stabilizing skin on the melt surface, e.g. by carefully controlled air cooling or dusting with powdered material, before more vigorous cooling by fluid coolant, e.g. air or water, directed against the solidified skin. Optionally, silicone liquids and/or kerosene or other hydrocarbons of lower boiling range are used in minor amounts to treat the melt before pouring to promote the formation of amorphous solidified material and provide increased hardness on aging. When using an endless belt as substrate, the plain solidification surface may be modified by superposing a skeleton framework to form selectively shaped tablet or bar molds. The process and apparatus are particularly applicable to the solidification of molten sulphur.
REFERENCES:
patent: 898378 (1908-09-01), Kohler
patent: 1497649 (1924-08-01), Marx
patent: 3264389 (1966-08-01), Sims
patent: 3440026 (1969-04-01), Dubow
patent: 3725518 (1973-04-01), Gaffney
patent: 3819793 (1974-06-01), Elliott
patent: 3842153 (1974-10-01), Owen et al.
patent: 3912431 (1975-10-01), Ellithorpe et al.
patent: 3988085 (1976-10-01), Krchma
March Arthur A.
Woo Jay H.
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