Method of driving and controlling rotary table in die casting ma

Details Method of driving and controlling rotary table in die casting ma Method of driving and controlling rotary table in die casting ma

1989-08-07

1990-03-06

Seidel, Richard K.

Metal founding

Process

With measuring, testing, inspecting, or condition determination

164130, 164326, 164327, 164154, B22D 502, B22D 4600

Patent

active

049057499

ABSTRACT:
This invention relates to a die casting machine in which a plurality of mold opening and closing units each having a pair of metal molds are positioned in suitable positions in the outer periphery of a rotary table and the rotary table is intermittently rotated so as to stop the mold opening and closing units in positions in alignment with associated operation stations. In the die casting machine, a rotary detection rotary shaft is provided for following the rotation of the rotary table, while the rotary shaft is making one complete rotation, a rotational angle detector produces outputs, the values of which increase continuously corresponding to angular positions of the rotary table for detecting rotational angles of the table whereby the table is driven and controlled and the angular position of the rotary table is detected using the rotational angle of the rotary detection shaft which is rotated through a gear provided on the drive shaft of a hydraulic motor driving the rotary table whereby the mold opening and closing units are mounted on the table error in measurement caused by distortion of the table when can be minimized to thereby detect the angular position of the table with high precision and precisely and easily brake and stop the table.

REFERENCES:
patent: 3703921 (1972-11-01), Hunter
patent: 3866666 (1975-02-01), Wunder
patent: 4754801 (1988-07-01), Ueno et al.

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