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Die-casting device and vacuum process

A technology of mold casting and decompression tank, which is applied in the field of decompression casting, can solve the problems of quality reduction of molded products, and achieve the effect of prolonging life and shortening time

Active Publication Date: 2005-11-30
TOSHIBA MASCH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, injection under high speed and high pressure conditions, the metal solution (molten metal) filled (pouring) in the injection sleeve (molten metal) 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, the gas forms air bubbles, causing holes in the molded product, thereby reducing the quality of the molded product

Method used

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  • Die-casting device and vacuum process
  • Die-casting device and vacuum process
  • Die-casting device and vacuum process

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Embodiment approach

[0044] Structure of the molding device

[0045] The configuration of a die casting apparatus according to one embodiment of the present invention will be described.

[0046] figure 1 It is a sectional view showing the structure around the die of the die casting apparatus according to one embodiment of the present invention.

[0047] The mold casting device 1 of the present embodiment includes: a fixed mold 2, a movable mold 3 that moves relative to the fixed mold 2, an injection device 10, a controller 30, a main decompression tank TA, an auxiliary decompression tank TB, a shut-off valve (check valve) valve) 60 and oxygen supply device 80.

[0048] The controller 30 is a part that performs various controls of the die casting apparatus 1 described in detail below, and is realized by using an arithmetic processing device such as a computer.

[0049] The injection device 10 includes a hydraulic cylinder 11 , a piston rod 12 , a connector 13 , an injection plunger 17 and an inj...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D17/14
CPCB22D17/04B22D17/145B22D17/22B22D17/32B23P15/24
Inventor 久保田正光
Owner TOSHIBA MASCH CO LTD
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