Glass manufacturing – Processes – With measuring – sensing – inspecting – indicating – or testing
Patent
1982-09-30
1986-07-08
Schor, Kenneth M.
Glass manufacturing
Processes
With measuring, sensing, inspecting, indicating, or testing
65 79, 65DIG13, C03B 1116, C03B 940
Patent
active
045990999
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention is concerned with a cyclic process of forming glassware in an individual section glassware forming machine, which machine has three stations spaced apart longitudinally of the machine, comprising the steps of forming a parison from a gob of molten glass in a blank mould at a blank station, transferring the parison from the blank station to an intermediate reheating station in which reheating of the parison takes place, transferring the reheated parison from the intermediate station to a shaping station, shaping an article of glassware from the reheated parison in a blow mould at the shaping station, and transferring the article of glassware from the shaping station to a take-out position.
The invention is also concerned with an individual section glassware forming machine which comprises three operating stations spaced apart longitudinally of the machine which are, respectively, a blank station including a blank mould for forming a parison, an intermediate station in which reheating of a parison takes place, and a shaping station including a blow mould for finally shaping an article of glassware, and independently operable first, second and third transfer means, the first transfer means being operable to transfer a parison from the blank station to the intermediate station, the second transfer means being operable to recieve a parison from the first transfer means, support the parison at the intermediate station and transfer the parison from the intermediate station to the shaping station, and the third transfer means being operable to transfer an article of glassware from the shaping station to a takeout position.
BACKGROUND ART
In the manufacture of glassware in a conventional individual section machine, a gob of molten glass is first formed into a parison in a blank mould at a blank station and the parison is transferred directly from the blank station to a shaping station where the parison is shaped into an article of glassware. During the manufacture of glassware in such a machine, an operator observes the glassware being produced and, when he notices any interruption to the production of glassware, he takes action to affect an emergency stop of the machine. During such an emergency stop, the feeding of further gobs of molten glass to the blank station is prevented and the machine is completely stopped. However, if the operator is not immediately aware of an interruption to production, the machine will continue to operate with further gobs being fed to it. Glass thus accumulates within the machine. While the glass is hot it can damage the operating parts of the machine by causing them to become excessively hot and, when the glass cools and hardens, damage can be done to the machine as the operating parts attempt to operate against the hard glass.
Whether the operator is immediately aware of an interruption to production or not, the conventional individual section machine must be brought to a complete halt for remedial action to be undertaken. When the manufacture of glassware is recommenced in that type of machine, there is a considerable delay before commercial articles of glassware are again produced because of the time necessary to bring the moulding equipment at both stations to the appropriate operating temperatures for production of glassware.
It has been proposed (see U.K. Patent Specification No. 1,491,859) to provide a modified form of the individual section glassware forming machine having three stations. A blank station at which a parison is formed, an intermediate reheating station where reheating of the parison takes place, and a shaping station at which shaping of the article of glassware from the parison takes place.
DISCLOSURE OF INVENTION
In accordance with the present invention, the applicants propose a process of forming glassware in an individual section glassware forming machine which comprises monitoring the formation of parisons and the shaping of articles of glassware during each cycle of the process, and utilising information derived from
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Emhart Industries Inc.
Moore Arthur B.
Schor Kenneth M.
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