Motor controlled tie bar system for die-casting machine

Details Motor controlled tie bar system for die-casting machine Motor controlled tie bar system for die-casting machine

1983-08-08

1986-07-08

Godici, Nicholas P.

Metal founding

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

Responsive to thermal condition

164 41, B22D 1726, B22D 1732

Patent

active

045987580

ABSTRACT:
An apparatus for setting tonnage on selective tie bars of a die-casting machine includes providing a separate drive motor fully connected at all times to each tie bar nut gear. The motors are manually or automatically controlled by a programmable logic control and a die height adjustment motor control and phase lock synchronizer which selectively energize each motor manually or automatically to adjust the tonnage in any one or all of the tie bars and wherein synchronizer concurrently adjusts the tonnage a like amount in all of the tie bars concurrently and a method for adjusting the tie bar system to compensate for uneven die expansion at one of the tie-rods includes the steps of (1) tightening only the tie-rod at the die flash location; (2) operating the machine through a lock-up mode; and (3) concurrently, and synchronously, removing a like amount of pressure from the machine if lock-up is not attained, the back-off being selected to reduce the tie bar tonnage a like amount at all tie bar locations so as to produce toggle lock-up without excessive reduction of tie bar tightening at the previously compensated die location.

REFERENCES:
patent: 4256166 (1981-03-01), Prince
patent: 4285384 (1981-08-01), Wunder

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