Ceramic core for silica sol precision casting and manufacturing process thereof

A ceramic core and precision casting technology, which is applied in the manufacture of tools, casting molding equipment, casting molds, etc., can solve the problems of complex stainless steel parts in the inner cavity, etc., and achieve the effect of clear outline, improved collapsibility, and good collapsibility

Inactive Publication Date: 2009-09-23
上海市机械制造工艺研究所有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an excellent ceramic core, which can solve the problem of stainless steel such as impeller and valve body with relatively complicated inner cavity in silica sol precision casting. production of parts

Method used

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  • Ceramic core for silica sol precision casting and manufacturing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention will be further described below in conjunction with specific examples.

[0028] a. Inspect the composition and particle size of refined quartz powder and disintegrating agent according to the following indicators:

[0029] SiO of quartz glass powder 2 Content greater than 98%; ZrO of zircon powder 2 The content is not less than 63%, and its particle size is 325 mesh; Al 2 o 3 The content is not less than 98%, and its particle size is 325 mesh; the particle size of the disintegrating agent is 270-325 mesh.

[0030] b. According to the following requirements, configure the binder for standby use (the following table is the weight percentage of the components of the binder):

[0031] Example 1

Example 2

Example 3

58#paraffin wax

60

70

90

Primary Stearic Acid

40

30

10

[0032] The adhesives of the three formulations can be used in conjunction with different seasons.

[00...

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Abstract

The invention discloses a ceramic core for silica sol precision casting and a manufacturing process thereof. Components of the ceramic core comprise quartz glass powder, zircon powder, white fused alumina powder and a proper amount of collapsing agent; and at the same time reasonable manufacturing processes such as mixing, core making and roasting are adopted. In the ceramic core for casting, the unique components and manufacturing processes are adopted, particularly the proper amount of collapsing agent added in the ingredients greatly improves the collapsibility of the ceramic core after casting, as is determined after a large number of experiments, and the high-quality high-temperature resistant material in the ingredients enables the core to resist the erosion of high-temperature molten metals.

Description

technical field [0001] The invention relates to a casting material and its manufacturing process, in particular to a casting core and its manufacturing process. Background technique [0002] The silica sol precision casting process can produce precise and complex metal parts that are close to the final shape of the product and can be used directly without or with little processing. It is characterized by high dimensional accuracy and good surface finish. However, castings with complex inner cavity, small aperture or narrow and curved castings may have difficulties in shell making, and it is difficult to control the dimensional accuracy. Using excellent ceramic cores to produce such castings can solve the above problems well. At present, there are more and more factories using silica sol precision casting technology to produce small and medium-sized steel castings, but most of them produce castings with relatively simple inner cavities. . Due to the needs of the market, Chi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/10B22C1/00B22C5/04
Inventor 毛军周联山吴伟平李佳和龚圣峰施风华周耀忠谭得鹫杨正道
Owner 上海市机械制造工艺研究所有限公司
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