Die casting method

A technology of molds and castings, applied in the field of casting, can solve the problems of thermal diffusivity and heat storage coefficient disclosure, workers suffering from silicosis, large expansion coefficient, etc., and achieve the effects of reducing workers' health risks, low price, and large thermal conductivity

Inactive Publication Date: 2016-02-10
广西博白县三田机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its large expansion coefficient, thermal diffusivity and heat storage coefficient, it is easy to have sand sticking defects during casting, and it is easy to produce dust with high silicon content during processing and use, causing workers to suffer from silicosis.
[0014] Limestone sand will not produce harmful dust in the casting process, and has the advantages of good collapsibility and smooth casting surface. crack

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A mold casting method, comprising the steps of:

[0038] 1) Process the foam board into a foam model;

[0039] 2) Apply refractory material on the surface of the foam model;

[0040] 3) Dry the foam model coated with refractory material;

[0041] 4) Embed the foam model in step 3) in the molding sand for vibration molding;

[0042] 5) Pouring fluid metal under negative pressure to vaporize the foam model;

[0043] 6) After the casting model in step 5) is cooled, the casting inside the sand box is separated from the dry sand to obtain the mold casting;

[0044] Step 4) The molding sand is composed of the following raw materials: 60kg of quartz sand, 40kg of limestone sand, 5kg of chrome ore sand, 1kg of zircon sand, and 3kg of corundum sand. The preparation method is to mix the raw materials according to the ratio, and stir evenly to obtain the product.

[0045] The specific method of modeling in step 4) is: put 60mm of molding sand at the bottom of the flask for co...

Embodiment 2

[0048] A mold casting method, comprising the steps of:

[0049] 1) Process the foam board into a foam model;

[0050] 2) Apply refractory material on the surface of the foam model;

[0051] 3) Dry the foam model coated with refractory material;

[0052] 4) Embed the foam model in step 3) in the molding sand for vibration molding;

[0053] 5) Pouring fluid metal under negative pressure to vaporize the foam model;

[0054] 6) After the casting model in step 5) is cooled, the casting inside the sand box is separated from the dry sand to obtain the mold casting;

[0055] Step 4) The molding sand is composed of the following raw materials: 80kg of quartz sand, 20kg of limestone sand, 20kg of chrome ore sand, 8kg of zircon sand, and 1kg of corundum sand. The preparation method is to mix the raw materials according to the ratio, and stir evenly to obtain the product.

[0056] The specific method of modeling in step 4) is: put 100mm of molding sand at the bottom of the flask for ...

Embodiment 3

[0059] A mold casting method, comprising the steps of:

[0060] 1) Process the foam board into a foam model;

[0061] 2) Apply refractory material on the surface of the foam model;

[0062] 3) Dry the foam model coated with refractory material;

[0063] 4) Embed the foam model in step 3) in the molding sand for vibration modeling;

[0064] 5) Pouring fluid metal under negative pressure to vaporize the foam model;

[0065] 6) After the casting model in step 5) is cooled, the casting inside the sand box is separated from the dry sand to obtain the mold casting;

[0066] Step 4) The molding sand is composed of the following raw materials: 65kg of quartz sand, 35kg of limestone sand, 7kg of chromium ore sand, 1kg of zircon sand, 2kg of corundum sand, and 0.2kg of graphite powder. The preparation method is to mix the raw materials according to the ratio, and stir evenly to obtain the product.

[0067] The specific method of modeling in step 4) is: put 70mm of molding sand at t...

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Abstract

The invention relates to a die casting method. The die casting method includes the following steps that (1) a foam board is machined into a foam model; (2) the surface of the foam model is coated with a refractory material; (3) the foam model coated with the refractory material is dried; (4) the foam model treated in the step (3) is buried in molding sand for vibration molding; (5) liquid metal is poured under negative pressure so as to gasify the foam model; and (6) after the poured model in the step (5) is cooled, a cast part in a sand box is separated from dry sand, and the die cast part is obtained. The molding sand in the step (4) is composed of the following raw materials of quartz sand, limestone sand, chromium ores, zircon sand and emery. The die casting method is suitable for evaporative pattern casting, not prone to adhesion to sand, settlement shrinkage or earthworm cracking, low in cost and capable of reducing hidden dangers to health of workers, and the reusability and collapsibility are good.

Description

technical field [0001] The invention relates to the field of casting, in particular to a mold casting method. Background technique [0002] Mold casting is a part of casting tooling, and it is the necessary equipment to shape the casting and obtain the required casting. Lost foam casting, also known as solid casting, is to bond and combine paraffin or foam models similar in size and shape to castings to form a model cluster. After brushing with refractory paint and drying, it is buried in dry sand for vibration modeling, and poured under negative pressure. , the model is vaporized, the liquid metal occupies the position of the model, solidified and cooled to form a new casting method of castings. It has the following advantages: [0003] 1. High casting precision [0004] Lost Foam Casting is a new technology with nearly no allowance and precise molding. This technology does not need to take molds, has no parting surface, and no sand core, so the casting has no flash, bur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04
Inventor 陈杰陈智强凌丽英陈勇
Owner 广西博白县三田机械制造有限公司
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