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Non-ceryl pattern material and manufacturing technology used for investment casting thereof

A production process, wax-based technology, applied in the direction of casting molding equipment, etc., can solve the problems of lowering the melting point and strength of investment molds, affecting the quality of precision casting products, and easy softening and deformation, so as to achieve small deformation, less investment, and not easy to soften Effect

Inactive Publication Date: 2010-11-10
HUAIYIN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, paraffin-stearic acid molding materials are still widely used in the precision casting industry, but paraffin-stearic acid molding materials have low strength and hardness, and are easy to soften and deform. Especially in the high temperature season in southern summer, production cannot be carried out in factories without air-conditioning facilities The softening and deformation of the investment mold directly affects the quality of precision casting products; moreover, the stearic acid in the mold material will reduce the melting point and strength of the investment mold; at the same time, the stearic acid in the mold material contacts with the metal during use, resulting in stearic acid Saponified matter makes the mold material brittle, the ash content increases, and the performance decreases
[0004] Based on the problems existing in the use of paraffin-stearic acid molding materials, many researchers have done a lot of experimental research, and have achieved a lot of results in the selection and testing of molding material components and formulas, but they cannot be obtained from fundamentally solve the problem

Method used

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  • Non-ceryl pattern material and manufacturing technology used for investment casting thereof
  • Non-ceryl pattern material and manufacturing technology used for investment casting thereof
  • Non-ceryl pattern material and manufacturing technology used for investment casting thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: as figure 1 As shown, the turbine casting is made of ZL104 aluminum alloy. The casting has 25 blades evenly distributed, and the upper and lower parts of the casting are connected by 25 blades. The blades need to be represented by coordinates in x, y, and z directions , because the blade is bent, it cannot be pulled out directly in the sand core, and it needs to be made by investment casting.

[0015] The non-wax-based molding material used in the investment casting is composed of the following components in mass percentage: 48.2% of potash, 32.2% of magnesium sulfate, 19.3% of aluminum sulfate, and 0.3% of ferric oxide.

[0016] The manufacturing process of non-wax-based molding materials for investment casting includes the manufacturing process of non-wax-based investment patterns and the manufacturing process of sand cores; wherein, the manufacturing process of non-wax-based investment patterns is: according to the aforementioned mass fraction ratio, ta...

Embodiment 2

[0017] Embodiment 2: as figure 2 As shown, the guide wheel casting is made of ZL104 aluminum alloy, and the inner and outer circles of the casting are connected by 20 blades, all of which are non-machined surfaces, and the roughness requirement reaches R a 6.3μm, requiring 20 blades to be evenly distributed; due to the high roughness requirements of the inner cavity and blades, it needs to be manufactured by investment casting.

[0018] The non-wax-based molding material used in the investment casting is composed of the following components in mass percentage: 48.2% of potash, 32.2% of magnesium sulfate, 19.3% of aluminum sulfate, and 0.3% of ferric oxide.

[0019] The manufacturing process of non-wax-based molding materials for investment casting includes the manufacturing process of non-wax-based investment patterns and the manufacturing process of sand cores; wherein, the manufacturing process of non-wax-based investment patterns is: according to the aforementioned mass f...

Embodiment 3

[0020] Embodiment 3: as image 3 As shown, the impeller casting is made of ZL104 aluminum alloy, and the casting has 24 blades evenly distributed, with a tolerance of ±10' for uneven division, and the upper and lower parts of the casting are connected by 24 blades; because the shape of the blade is In the three-dimensional bending state, it cannot be pulled out directly in the sand core, and it needs to be made by investment casting.

[0021] The non-wax-based molding material used in the investment casting is composed of the following components in mass percentage: 48.2% of potash, 32.2% of magnesium sulfate, 19.3% of aluminum sulfate, and 0.3% of ferric oxide.

[0022] The manufacturing process of non-wax-based molding materials for investment casting includes the manufacturing process of non-wax-based investment patterns and the manufacturing process of sand cores; wherein, the manufacturing process of non-wax-based investment patterns is: according to the aforementioned mass...

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Abstract

The invention discloses a non-ceryl pattern material and a manufacturing technology used for investment casting thereof. The non-ceryl pattern material comprises the following components in percentage by weight: 48.2% of potassium aluminum sulphate, 32.2% of magnesium sulfate, 19.3% of aluminum sulfate and 0.3% of ferric oxide, wherein the manufacturing technology comprises the manufacturing process of non-ceryl investment and the manufacturing process of sand cores. The non-ceryl pattern material does not contain paraffin or stearic acid, replaces the ceryl pattern material for investment casting, has small deformation, is not easy to soften, has simple process, saves time and labor, reduces cost, and is particularly suitable for manufacturing large and medium-sized impeller precision castings with small production lot, which are delivered in a short time, have complicated inner chamber shape, are provided with blades and are inconvenient for gold processing.

Description

technical field [0001] The invention relates to investment casting, in particular to a non-wax-based molding material and a manufacturing process for investment casting. Background technique [0002] As we all know, investment casting is a casting process with almost no margin. Under normal circumstances, people are used to refer to investment casting as lost wax casting. Because most of the molding materials used for investment patterns are mainly wax-based or basically contain paraffin wax. With the development of nearly no-reserve casting technology, investment molds must have higher dimensional accuracy and surface quality than ordinary casting models, and the key is to choose high-quality mold materials and adopt appropriate mold-making processes. [0003] At present, paraffin-stearic acid molding materials are still widely used in the precision casting industry, but paraffin-stearic acid molding materials have low strength and hardness, and are easy to soften and def...

Claims

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Application Information

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IPC IPC(8): B22C7/02
Inventor 卓荣明
Owner HUAIYIN INSTITUTE OF TECHNOLOGY
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