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Technique of chill casting with shrink being compensated at top

A water-cooled die casting and cold die technology, applied in the field of casting moulds and metal casting, can solve the problems of low yield and difficult quality assurance, and achieve the effects of good quality density, improved yield and lower production costs.

Inactive Publication Date: 2003-05-07
孙柏良
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The yield rate of the product is low and the quality is difficult to guarantee

Method used

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  • Technique of chill casting with shrink being compensated at top
  • Technique of chill casting with shrink being compensated at top

Examples

Experimental program
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Effect test

Embodiment 1

[0012] The specific implementation process of the up-feeding shrinkage water-cooled mold casting machine of the up-feed shrinkage water-cooled mold casting technology of the present invention: the mold casting machine is composed of a frame (1), a connecting rod (2), a frame (3), a mold body (4 ), the middle injection pipe (5) and the die top (6) of the upper feeding are sequentially connected to form. And upper feeding shrinkage mold top (6) is to be made of insulation cap (7), baffle plate (8), sandy filler (9) and guard plate (10) from inside to outside, insulation cap (7) and mold body ( 4) The upper plane is limited and flexibly connected by the positioning ring (11); the thermal insulation cap (7) is an thermal insulation extension of the same shape as the inner lining of the mold body (4), and it is made of light heat insulation material; the baffle (8) and the guard (10) are welded together with the upper plane of the mold body (4), thereby constituting the sand storag...

Embodiment 2

[0014] On the upper feeding shrinkage water-cooled die casting machine of embodiment 1, adopt following cast steel operating method:

[0015] a. Mold closing—use circulating water to control the temperature of the inner wall of the mold body (4) of the mold casting machine to be 10-50 degrees Celsius higher than the room temperature, and then manipulate the connecting rod (2) and the frame (3) to pull the symmetrical mold body (4) closure;

[0016] b. Pouring——Inject molten steel from the middle injection pipe (5) into the mold body (4) from bottom to top. Rising 800-1200 mm / min in the mold body (4), till molten steel is full in the mold body (4).

[0017] c. Demoulding—operate the upper connecting rod (2) to loosen the upper part of the mold body (4) 1 minute after the pouring is completed, and its inner wall is separated from the billet to a gap of 1-2 mm. After standing for 2 minutes, operate the upper and lower parts. Lower connecting rod (2), mold body (4) is all opened...

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Abstract

A cold-mould casting technique by supplementing from top features that when the steel is solidified from bottom to top, all the gas and impurities can be exhausted by raising up through the molten steel, resulting in no pinholes and high compactness.

Description

Technical field: [0001] The invention belongs to mold and metal casting, in particular to an up-feeding water-cooled mold casting technology. Background technique: [0002] At present, the existing open-type water-cooled die-casting technology adopts the down-feeding method. Because there is a hydraulic capping device on the upper part of the die casting machine, at the later stage of pouring, that is, after all the molten steel in the ladle is injected, the capping hydraulic system is operated to seal the liquid surface of the molten steel. Phenomenon. The solidification and shrinkage of molten steel in the billet cavity can only be fed by the flow of steel in the lower part or the residual molten steel in the center injection pipe. This method is under-feeding molding technology. The "open water-cooled die casting machine" disclosed by CN1241461A on January 19, 2000 is the most typical lower feeding die casting technology. The disadvantage of this bottom feed die casti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D7/06B22D27/04
Inventor 孙柏良
Owner 孙柏良
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