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Effective method for improving feeding efficiency of sand mold casting

A technology of sand casting and shell casting, which is applied in the field of improving the feeding efficiency of sand casting. It can solve the problems of large shrinkage of molten steel, inability to feed, and difficult feeding of products, so as to improve internal quality, reduce shrinkage and porosity. Reduce the effect of quality problems

Pending Publication Date: 2021-05-07
无锡市蠡湖铸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing cast steel products have large shrinkage of molten steel, which is prone to shrinkage and porosity, and the channel required for feeding is also large. However, under the market demand for lightweight automobiles, it is difficult for customers to fully consider the feasibility of casting in their design. Therefore, there are insufficient feeding channels. In such cases, it is difficult to feed inside the product, and the shrinkage problem cannot be solved.
[0003] For the existing turbine shell products, its structure is complex, the wall thickness is uneven, and the feeding channel is insufficient, so it cannot be fed according to the conventional thermal pitch circle principle, and its sequential solidification gradient cannot be guaranteed

Method used

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  • Effective method for improving feeding efficiency of sand mold casting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]An effective method of improving sand casting replenishment efficiency, including the following steps:

[0023](1) Casting process:

[0024]A, the shell casting, all of the shapes have a coating sand mold, in order to ensure surface roughness, and the coating can produce a certain amount of cooling effect on castings;

[0025]b, arrange the riser and cold iron in the product plane position, controlling its cooling speed, ensuring the order of order;

[0026]C. When pouring, a small metal solution B is introduced synchronously, wherein the metal solution B is separated from the surface of the product, further, a film covers isolation between the metal fluid B and the product surface. Further, the film is used as a polytetrafluoroethylene iron-proof dragon PTFE film;

[0027](2) Product testing:

[0028](1) cutting cutting on the product line;

[0029](2) Cut surface dyeing test.

Embodiment 2

[0031]An effective method of improving sand casting replenishment efficiency, including the following steps:

[0032](2) Casting process:

[0033]A, the shell casting, all of the shapes have a coating sand mold, in order to ensure surface roughness, and the coating can produce a certain amount of cooling effect on castings;

[0034]b, arrange the riser and cold iron in the product plane position, controlling its cooling speed, ensuring the order of order;

[0035]C. When the pouring is pouring, a small metal solution B is introduced synchronously, wherein the metal solution B is isolated from 5 mm from the surface of the product, and the film B and the surface of the product are covered with a film. Further, the film is used as a polytetrafluoroethylene iron-proof dragon PTFE film;

[0036](2) Product testing:

[0037](1) cutting cutting on the product line;

[0038](2) Cut surface dyeing test.

Embodiment 3

[0040]An effective method of improving sand casting replenishment efficiency, including the following steps:

[0041](3) Casting process:

[0042]A, the shell casting, all of the shapes have a coating sand mold, in order to ensure surface roughness, and the coating can produce a certain amount of cooling effect on castings;

[0043]b, arrange the riser and cold iron in the product plane position, controlling its cooling speed, ensuring the order of order;

[0044]C. When pouring, a small metal solution B is introduced synchronously, wherein the metal fluid B is isolated from the surface of the product, further, the metal solution B and the surface of the product are covered with a film cover. Further, the film is used as a polytetrafluoroethylene iron-proof dragon PTFE film;

[0045](2) Product testing:

[0046](1) cutting cutting on the product line;

[0047](2) Cut surface dyeing test.

[0048]In summary, the traditional casting process (not introduced into the metal solution), due to the product structu...

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Abstract

The invention discloses an effective method for improving the feeding efficiency of sand mold casting, and relates to the technical field of sand mold casting. The method specifically comprises the following steps of (1) casting process; and (2) product detection. According to the effective method for improving the feeding efficiency of sand mold casting, when a sand core structure is changed and pouring is conducted, a strand of molten metal b is synchronously introduced into the small position a of a feeding channel, the feeding channel is heated through heat of the molten metal b, it is ensured that solidification at the feeding channel is slower, meanwhile, in order to not affect the product structure, the molten metal b is separated from the surface of a product by 4-6 mm, and under the new casting process condition, the product detection structure is qualified, and the effective method for improving the feeding efficiency of sand mold casting effectively improves the feeding efficiency, reduces the problem of shrinkage porosity caused by solidification sequence difference, can effectively improve the internal quality of the product, and reduces most quality problems caused by shrinkage porosity.

Description

Technical field[0001]The present invention relates to the field of sand casting techniques, specifically an effective method for improving sand-type cast suppression efficiency.Background technique[0002]Existing cast steel products, steel shrinkability, easy to generate loose problems, the channels needed for renewal are also large, but under the low-volume market demand, customers are difficult to completely consider casting feasibility, Therefore, there is a case where the replenishment channel is insufficient, in such cases, the internal product is difficult to supplement, and the problem cannot be resolved.[0003]For existing turbo shell products, its structure is complex, the wall thickness is uneven, the replenishment channel is insufficient, and it is impossible to suppress the conventional heat circulation principle.Inventive content[0004]In response to the deficiencies of the prior art, the present invention provides an effective method of improving sand-type cast complexing...

Claims

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Application Information

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IPC IPC(8): B22C9/02B22C9/08B22C9/10B22D15/00
CPCB22C9/02B22C9/082B22C9/088B22D15/00B22C9/10
Inventor 嵇振桓季超
Owner 无锡市蠡湖铸业有限公司
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