Glass manufacturing – Processes – Utilizing parting or lubricating layer
Patent
1983-06-08
1985-02-12
Smith, William
Glass manufacturing
Processes
Utilizing parting or lubricating layer
65 26, C03B 4002
Patent
active
044989180
ABSTRACT:
An improvement in a method for producing a glass article is disclosed. The method includes the steps of lubricating the walls of a mold cavity by igniting a gas therein, introducing a gob into the mold cavity, and pressing the gob to a desired shape. The improvement involves the use, as the gas ignited in the mold cavity, of a mixture of a methyl acetylene/propadiene gas and a hydrocarbon gas having an acetylenic triple bond. The proportion of the hydrocarbon having an acetylenic triple bond is controlled to one at which the flame which results from igniting the gas mixture is capable of penetrating an air lock in a deep mold cavity. Usually, the hydrocarbon gas having an acetylenic triple bond has from two to six carbon atoms and constitutes from 1 percent by volume to 10 percent by volume of the gas mixture.
REFERENCES:
patent: 3052629 (1962-09-01), Morrow et al.
patent: 3141752 (1964-07-01), Keller
patent: 3508893 (1970-04-01), Duggan
patent: 3523016 (1970-08-01), Mattos
patent: 3988137 (1976-10-01), Goodwin
patent: 3994703 (1976-11-01), Newing, Jr. et al.
patent: 4333756 (1982-06-01), Seeman
Monsanto "Certificate of Quality" for Methyl Acetylene Propadiene, dated Jul. 13, 1977.
Synthatron Corporation data sheet for ethyl acetylene.
Synthatron Corporation data sheet for dimethyl acetylene.
Boyer Michael K.
Purdue David C.
Purdue John C.
Smith William
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