Press with columns compensated for deformation during tightening

Details Press with columns compensated for deformation during tightening Press with columns compensated for deformation during tightening

1984-06-22

1985-08-06

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Mold opening and closing means and segmented female mold

Varying pressure and/or speed closing

425590, 425406, B29F 106

Patent

active

045333130

ABSTRACT:
Each column of a press comprises a core rod 2 slidably surrounded by a sleeve 3. The tightening jack 10 associated with the column in question acts on the mobile plate 8 to tighten the mould 11, 12. The upper plate 4 transmits the reaction to the auxiliary jack 5-6 which, bearing on the core 2, applies to the plate 4 a force equal to that developed by the auxiliary jack. In this way the sleeve is theoretically subjected to no effort. The jacks 9, 10 and 5-6 may be supplied in parallel. If the tightening jack 9-10 is not coaxial to the column, one may be content with an approximate solution, or one may use as auxiliary jack a multiple jack in tandem, suitably supplied, or the deformations of the sleeve may be detected and the auxiliary jack controlled so that it cancels them.

REFERENCES:
patent: 3433290 (1969-03-01), Eggenberger et al.
patent: 3570060 (1971-03-01), Stephenson
patent: 3613171 (1971-10-01), Hehl
patent: 3669599 (1972-06-01), Snider et al.
patent: 3830613 (1974-08-01), Aoki
patent: 3905741 (1975-09-01), Poncet
patent: 4021181 (1977-05-01), Hehl
patent: 4106885 (1978-08-01), Poncet
patent: 4304540 (1981-12-01), Hammon

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