Adhesive bonding and miscellaneous chemical manufacture – Surface bonding means and/or assembly means therefor – Automatic and/or material-triggered control
Patent
1987-09-28
1990-10-16
Ball, Michael W.
Adhesive bonding and miscellaneous chemical manufacture
Surface bonding means and/or assembly means therefor
Automatic and/or material-triggered control
91 51, 100 48, 100 93P, 100269R, 156382, 1565831, B30B 132, B30B 702, B30B 1520
Patent
active
049632213
ABSTRACT:
The present invention relates to a hot press to manufacture a substrate in which a printed circuit is provided.
The hot press comprising at least one of vertically movable heating plates, a freely elevating movable platen which elevates the heating plates to press a plate to be treated between the heating plates, and a detecting means for detecting the movement of the uppermost heating plate when said uppermost heating plate starts to be elevated, in which the elevating speed of the movable platen is changed to a lower speed by a signal generated from the detecting device.
This low speed control is carried out as follows. Relief valves and direction control valves are provided at a primary side and secondary side, respectively, of a clamping cylinder into which a ram for elevating the movable platen is inserted, and due to the difference of pressures between the primary and secondary sides of the clamping cylinder, it is made possible to successively change the clamping force from zero by elevating the ram at low speed, thereby giving a desired clamping force to the ram.
REFERENCES:
patent: 2558796 (1951-07-01), Tapper
patent: 3050777 (1962-08-01), Siempelkamp
patent: 3236176 (1966-02-01), Fischer
patent: 3465645 (1969-09-01), Mala
patent: 3538814 (1970-11-01), Fisher
patent: 4356763 (1982-11-01), Hagstrom
patent: 4576092 (1986-03-01), Yamato
patent: 4666551 (1987-05-01), Soberay et al.
Isobe Koukichi
Ogawa Masahiko
Ball Michael W.
Kabushiki Kaisha Meiki Seisakusho
Maki Steven D.
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