Die-casting device and vacuum process

A technology of die casting and decompression tank, which is applied in the field of decompression casting, can solve the problems of lowering the quality of die casting products, and achieve the effect of prolonging the life and shortening the time.
CN100335207CActive Publication Date: 2007-09-05TOSHIBA MASCH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
TOSHIBA MASCH CO LTD
Publication Date
2007-09-05

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Abstract

The purpose of this invention is to improve a die casting apparatus by using an oxygen-replacing die casting method, with which a high quality die cast product can be produced. The oxygen gas is filled up into a cavity C and an injection sleeve 16 by using an oxygen gas supplying device 80, and after purging inner parts in the cavity C and the injection sleeve 16 with the oxygen gas, portions having the possibility of infiltrating the outer air into the cavity C, for example, an auxiliary reducing pressure tank B and a third opening / closing valve SV for performing the reduced pressure exhausting from a fixed die flowing path 2c and a moving die flowing path 3c, and a main reducing pressure tank TA and a first opening / closing valve MV for performing the pressure reduction in the cavity C are simultaneously and parallel driven.
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Description

technical field

[0001] The present invention relates to a die casting device (die casting machine) and a reduced-pressure casting method for a die casting device.

[0002] In particular, the present invention relates to a die-casting apparatus to which an oxygen displacement die-casting method is applied, and a reduced-pressure casting method in the die-casting apparatus. Background technique

[0003] One of the reasons for the decrease in reliability due to variations in the quality of die-cast products such as aluminum die-cast products is due to the inclusion of gas or the like in the die-cast products. That is, under high-speed, high-pressure injection, the metal solution (molten metal) filled (pouring) in the injection sleeve, such as aluminum metal solution, becomes turbulent in the cavity of the injection sleeve and the mold, and carries air and water vapor Filled in the cavity of the gas mold, these gases form bubbles, causing holes in the molded product, thereby re...

Claims

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