Glass manufacturing – Processes – Utilizing parting or lubricating layer
Patent
1981-03-09
1982-06-08
Kellogg, Arthur D.
Glass manufacturing
Processes
Utilizing parting or lubricating layer
65 24, 65 26, C03B 4002
Patent
active
043337562
ABSTRACT:
Improvements in a method for producing a pressed glass article are disclosed. The method includes causing a gas to flow from a manifold around the exterior of a plunger used for pressing a gob of softened glass in a mold; the improvements include the use of a gas which is a cold mixture of at least one alkane and at least one unsaturated hydrocarbon, control of the proportion of alkane to unsaturated hydrocarbon so that a substantially invisible lubricious coating is deposited on the plunger, causing the gas to flow at a sufficiently high rate to cause excessive cooling, and controlling the temperature of the plunger by periodically interrupting the gas flow. The method of the invention provides cooling and lubrication of glass pressing apparatus with a single gas mixture, and helps to alleviate such problems as high expense, inadequate cooling and/or lubrication, pollution and excessive carbonaceous residue which can result from conventional methods.
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Monsanto "Certificate of Quality" for Methyl Acetylene Propadiene, dated: 7/13/77.
Synthatron Corporation data sheet for ethyl acetylene.
Synthatron Corporation data sheet for dimethylacetylene.
Kellogg Arthur D.
Purdue John C.
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