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Multilayer casting filter

A filter and filter layer technology, applied in the direction of filtration and separation, chemical instruments and methods, separation methods, etc., can solve the problem of filter strength, high temperature impact resistance, high temperature bearing capacity reduction, filter cannot withstand high temperature impact, and reduce the temperature of molten metal Filtration effect and other issues, to achieve the effects of not easy deformation and cracking, strong ability to remove impurities and slag, and improve pouring speed and continuity

Active Publication Date: 2012-02-15
JIANGXI BAOAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the filtering effect, the pore diameter of the honeycomb is very small, and the pore diameter is generally required to be less than 2 mm. Therefore, the pouring flow resistance of the molten metal is increased, the pouring speed is reduced, and the honeycomb pores are easily blocked, which reduces the filtering effect of the molten metal and affects the quality of the casting. ; If the filter is thick and thin, although the honeycomb holes are not easy to block and can increase the pouring speed, the strength, high temperature impact resistance and high temperature bearing capacity of the filter are reduced, and the filter cannot withstand high temperature impact and heavy metal liquid bearing capacity. The medium filter is easy to burst, causing the casting to be scrapped

Method used

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Examples

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Embodiment 1

[0025] Example 1, in figure 1 and figure 2 Among them, the multi-layer casting filter sheet described in this embodiment 1 is in the shape of a cube, which is formed by bonding a square filter layer 2 and a square support layer 1 with an adhesive to form a whole, the filter layer is located above the support layer, and the filter layer The external dimensions are slightly smaller than the external dimensions of the support layer. The thickness of the filter layer is 3 mm, and the thickness of the support layer is 8 mm. There are honeycomb filter holes 3 on the filter layer. The cross-section of the filter holes is square. There are 289 filter holes per square inch (called 300 mesh in the ceramic industry), the pore diameter is 1.2×1.2 mm, the hole wall thickness is 0.3 mm, and the through-hole rate is 62.5%. According to the manufacturing process of honeycomb ceramics in the prior art, the filter layer is made of mullite ceramic material, which is pressed and formed in a str...

Embodiment 2

[0026] Example 2, in image 3 in, due to image 3 The cross-sectional structure of the figure 2 The cross-sectional structure is similar, thus omitting the image 3 The cross-sectional view of the cross-sectional view, the multi-layer casting filter described in the present embodiment 2 is cylindrical, and it is formed by a cylindrical filter layer 2 and a cylindrical support layer 1 bonding combination to form a whole, the filter layer is located above the support layer, and the filter The external dimensions of the layer are slightly smaller than the external dimensions of the support layer. The thickness of the filter layer is 4 mm, and the thickness of the support layer is 13 mm. There are honeycomb filter holes 3 on the filter layer. The cross-section of the filter holes is square. There are 196 filter holes per square inch (called 200 mesh in the ceramic industry), the pore diameter is 1.4×1.4 mm, the hole wall thickness is 0.4 mm, and the through-hole rate is 58.7%. ...

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Abstract

The invention discloses a multilayer casting filter, comprising a support layer (1) made of a ceramic material and a filtering layer (2) made of a ceramic material and arranged on the support layer. The filtering layer contains alveolate filtering holes (3); the support layer contains grid liquid flow holes (4); a hole density of the filtering layer is larger than that of the support layer; an aperture of a filtering hole is smaller than that of a liquid flow hole; a porosity of the support layer is larger than that of the filtering layer (2); and a thickness of the filtering layer is smaller than that of the support layer. The invention can simplify a pouring system, increase produce rate of a cast technology, reduce cast costs, enhance flow velocity and continuity of pouring, facilitate cast mold filling, improve high temperature impact resistance and high temperature bearing capacity of the filter, ensure integrity of the filter in the whole pouring process, facilitate filtering purification of metal liquid and improve inner quality and comprehensive performances of a cast product, and is suitable for pouring of multiple-part mold and large and medium size cast.

Description

technical field [0001] The invention relates to a filter device, in particular to a multi-layer filter sheet for pouring molten metal. Background technique [0002] As we all know, filters have been widely used in metallurgy and foundry industries for pouring and filtering molten metal, especially for complex thin-walled castings with high quality requirements and quality assurance for large and medium-sized castings. It can not only simplify the casting system, improve the casting process yield, but also remove impurities and slag, purify the molten metal, increase the pouring speed and continuity, significantly improve the overall performance of the casting, prolong the service life, improve the quality of the casting, and reduce the waste of the casting Rate. At the beginning of molten metal filtration, carbon fiber filters are mostly used, but carbon fiber filters not only filter into a single layer, but the filtering effect is not very good, and the mechanical strength...

Claims

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Application Information

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IPC IPC(8): B01D39/20
Inventor 王建忠王辉王桦庆
Owner JIANGXI BAOAN NEW MATERIAL TECH
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