Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means to close mold
Patent
1984-07-20
1985-10-08
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means to close mold
4254512, B29F 100
Patent
active
045457565
ABSTRACT:
A hydraulic clamping apparatus including a base, a first support means for supporting a first mold and retained by the base and a second support means for supporting a second mold and retained by the base means, the second support means being movable relative to the base means along a path so as to move the second mold into engagement with the first mold. A first hydraulic actuator comprises a first cylinder, a first piston retained thereby, and a rod coupled between the first piston and the second support means. The first actuator is operable to produce reciprocating first strokes of the rod along the path. A second hydraulic actuator comprises a second cylinder and a ram piston shaped and arranged so as to permit with respect thereto relative movement along the path of the second support means. The ram piston has a diameter substantially greater than the first piston and is movable along the path in reciprocating second strokes substantially shorter than the first strokes. In addition, the second cylinder comprises large and small diameter portions retaining, respectively, a large diameter portion of the ram piston and a small diameter portion thereof and the ram piston defines an opening that is axially aligned with and receives the rod which is connected to an engagement portion of the second support means. The second actuator further comprises a first annular seal between the large diameter portions of the second cylinder and the ram piston and a second annular seal between the small diameter portions thereof. Finally, a clutch mechanism is operable to engage the ram piston with the engagement portion of the second support means so as to produce movement thereof in response to said second strokes.
REFERENCES:
patent: 3263277 (1966-08-01), Ohlendorf et al.
patent: 3270372 (1966-09-01), Hesse
patent: 3656877 (1972-04-01), Aoki
patent: 3677685 (1972-07-01), Aoki
patent: 4158327 (1979-06-01), Aoki
Hiroshi Sakurai
Yong Chul Kim
Flint, Jr. J. Howard
Jarcho Harold G.
Toupal John E.
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