Tie bar adjustment system

Details Tie bar adjustment system Tie bar adjustment system

1979-01-11

1981-03-17

Baldwin, Robert D.

Metal founding

Control means responsive to or actuated by means sensing or...

Responsive to thermal condition

74405, 164303, B22D 1726

Patent

active

042561663

ABSTRACT:
A system for individually adjusting tie bars of a die casting machine during operation includes a threaded sleeve securing one end of each of the threadless tie bars to a backing plate with an adjustment nut positioned between the backing plate and threaded sleeve for adjusting the machine lockup tension on the tie bar. The adjustment nut associated with each of the four tie bars has gear teeth and can be adjusted by means of disengagable idler gears commonly engaging a centrally located bull gear for selectively adjusting one or more of the tie bars. In one embodiment of the invention, strain gauges are placed on the threaded sleeves for detecting the lockup force applied to the tie bars through the sleeves and an electrical control circuit is employed for automatically controlling the tie bar adjustment mechanism to maintain tie bar tension within prescribed limits during production operation of the die casting machine.

REFERENCES:
patent: 2484344 (1949-10-01), Hiller et al.
patent: 4187734 (1980-02-01), Mann

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