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Flabelliform-slope buffered sprue cup for casting

A sprue cup and sprue cup technology, which is applied in the casting gate field, can solve the problems of not meeting the needs of high-quality grinding balls and grinding segments, insufficient pouring, shrinkage cavities, etc. The effect of less sticky residue and long service life

Inactive Publication Date: 2010-08-04
ANHUI FENGXING WEAR RESISTANT MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, when using a funnel-shaped sprue cup, the molten metal will directly flush the mold at high speed, resulting in casting defects such as iron beans, sticky sand, slag holes, shrinkage cavities, cracks, and insufficient pouring
Therefore, this funnel-shaped sprue cup is only suitable for small low-end castings of sand casting and metal casting that do not have high requirements for slag retention, and it is far from meeting the needs of high-quality grinding balls and grinding segments in domestic and foreign markets.

Method used

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  • Flabelliform-slope buffered sprue cup for casting
  • Flabelliform-slope buffered sprue cup for casting

Examples

Experimental program
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Effect test

Embodiment 1

[0017] see figure 1 and figure 2 , for production The fan-shaped slope buffer sprue cup of the wear-resistant ball includes a sprue cup body 1, and the sprue cup body is made of silicon carbide refractory material. The sprue cup body 1 is provided with a fan-shaped melt pool 2, the bottom surface 3 of the melt pool is a slope surface, and the highest point of the bottom surface is located at the large diameter end of the melt pool, and the lowest point is located at the small diameter end of the melt pool ; The small diameter of the melt pool 2 is provided with a vertically downward sprue 4 .

[0018] The radius of the large end of the fan-shaped melt pool 2 is 85 mm, the radius of the small end is 15 mm, and the center distance between the two ends is 157 mm, and the depth is 80 mm; the slope α of the bottom surface is 2.5 degrees; the straight gate The diameter is 30 mm. Its overall dimensions are 310×220×160 (mm).

Embodiment 2

[0020] for production For the fan-shaped slope buffer sprue cup of wear-resistant balls, the radius of the large end of the melt pool 2 is 120 mm, the radius of the small end is 25 mm, and the center distance between the two ends is 180 mm, and its depth is 100 mm; The slope α of the bottom surface is 15 degrees; the diameter of the sprue is 50 mm.

[0021] Others are with embodiment 1.

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Abstract

The invention relates to a flabelliform-slope buffered sprue cup for casting. The sprue cup comprises a sprue cup body, which is provided with a flabelliform melt pool, the bottom of the melt pool is sloped, moreover, the highest position of the bottom is located at the large-diameter end of the melt pool, and the lowest position of the bottom is located at the small-diameter end of the melt pool; and a downsprue which vertically penetrates downwards is arranged at the small-diameter position of the melt pool. The sprue cup adopts novel carborundum refractory, the novel carborundum refractory is mechanically pressed, and is then sintered under high temperature, the refractoriness of the sprue cup can be up to more than 1700 DEG C, and the service life is long. The sprue cup is used for the sand casting of grinding balls (grinding section), and can remarkably reduce casting defects such as air holes, sand holes, splashings and sand burning, and the yield can be up to more than 97 percent.

Description

technical field [0001] The invention belongs to a sprue for casting, in particular to a sprue cup for casting a wear-resistant medium casting. Background technique [0002] The function of the sprue cup is to introduce the liquid metal into the cavity of the mold. The sprue cups of small castings are mostly funnel-shaped, and the sprue cups of medium-sized and above castings are often basin-shaped. For castings with high quality requirements, filters and other slag collecting devices should be installed in the sprue cups. If the design or selection of the sprue cup is unreasonable, it may cause casting defects such as pores, trachoma, iron beans, slag holes, shrinkage cavities, cracks and insufficient pouring. Therefore, the correct selection of the structure and size of the sprue cup and the reasonable placement on the mold are one of the key factors to improve the quality of castings and reduce the rejection rate of castings. [0003] As a grinding medium, cast grinding ...

Claims

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Application Information

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IPC IPC(8): B22D41/00
Inventor 陈宗明陈晓沈茂林储贵安
Owner ANHUI FENGXING WEAR RESISTANT MATERIALS CO LTD