Method and apparatus of controlling injection of die casting mac

Details Method and apparatus of controlling injection of die casting mac Method and apparatus of controlling injection of die casting mac

1996-03-26

1997-09-02

Lin, Kuang Y.

Metal founding

Process

With measuring, testing, inspecting, or condition determination

164113, 1641553, 164312, B22D 1732

Patent

active

056621590

ABSTRACT:
A method and an apparatus of controlling the injection of a die casting machine can be used for any existing metal molds without requiring the use of a metal charge front sensor and shift the speed of advancement of the plunger rod to initiate a forced speed reduction of the plunger at a right timing regardless of variances in the charge of molten metal so that the machine may stably produce quality die cast products. Such a method of controlling the injection of a die casting machine for injecting molten metal fed to an injection sleeve into a metal mold by means of an injection plunger 100 to charge the metal mold with molten metal comprises the steps of detecting the pressure of the plunger rod charging the metal mold with molten metal; determining that the molten metal has arrived the gate section, or injection port, of the metal mold at a time when the detected pressure gets to a predetermined value; and controlling the injection speed on the basis of the time.

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