Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1975-01-20
1976-07-06
Lindsay, Jr., Robert L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65260, 294 87R, 294 88, 65359, C03B 944
Patent
active
039679462
ABSTRACT:
A pair of horizontal arms, pivotally supported on a common vertical axis at one end, is provided to hold the separable halves of a plurality of parison molds or a plurality of final shaping (blow) molds in a multi-gob glassware forming machine. The mold halves on each arm (which cooperate with the complementary halves on the other arm to define the mold cavities) are supported for limited movement relative to the arm, and at least one, or if preferred, each arm has a plurality of fluid pressure responsive means (such as a bellows or piston) which apply force to the associated mold halves when they engage the complementary mold halves. Each such arm has a passage connecting its plurality of pressure responsive means, the passage being filled or substantially filled with hydraulic fluid which is subjected to pressure when the arms of the pair are mechanically actuated to bring the complementary mold halves into engagement, so that all of the pressure responsive means in each such arm will apply equal pressure or force to their associated mold halves. In preferred form, each arm has horizontal upper and lower parts or sections connected by an integral vertical strut, and each horizontal section carries a plurality of pressure responsive means. With this arrangement, each mold half is engaged in its upper area and in its lower area by a pressure responsive means applying the same pressure to hold the mold half in closed cavity-forming engagement with its complementary mold half.
REFERENCES:
patent: 1745959 (1930-02-01), Steiner
patent: 2949701 (1960-08-01), Olson et al.
patent: 3607207 (1971-09-01), Dahms et al.
patent: 3617233 (1971-11-01), Mumford
Emhart Corporation
Lindsay, Jr. Robert L.
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