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Manufacturing method of fired mold precision cast aluminum alloy case

A technology of investment precision casting and manufacturing method, which is applied to casting molding equipment, casting molds, casting mold components, etc., can solve the problems of high cost and high price of zircon powder, achieve convenient procurement, improve production efficiency and improve casting products. efficiency, reducing production costs

Inactive Publication Date: 2013-02-13
XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this stage, zircon powder and Shangdian sand are mainly used as formwork materials at home and abroad, but due to the high price of zircon powder, the cost is very high for mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] The preparation of the transition layer slurry is the same as step 2), but after adding the surface layer slurry, the measured specific gravity of the slurry is 1.8, and the viscosity of the slurry is 18;

[0039] 5) Transition layer sanding

[0040] Use 35-mesh Shangdian sand to sprinkle sand on the surface layer of the transition layer slurry, drying time is 6 hours, self-drying, and the number of layers is 1 layer;

[0041] 6) Preparation of reinforcement layer slurry

[0042] The preparation of the reinforcement layer slurry is the same as step 2), but after adding the surface layer slurry, the measured specific gravity of the slurry is 2.0, and the viscosity of the slurry is 16; and the store powder is 200#.

[0043] 7) Sprinkle sand on the reinforcement layer

[0044] Use 22-mesh Shangdian sand to sprinkle sand on the surface of the reinforcement layer slurry, drying time is 6 hours, wind drying, and the number of layers is 3 layers;

[0045] 8) Preparation of ...

Embodiment 1

[0051] 1 Binder preparation Mix GRJ-30 silica sol with a pH range of 9 to 11 and distilled water or (purified water) at a ratio of 10:1, and the slurry can be prepared after sufficient stirring.

[0052] 2 Surface layer slurry preparation Pour the prepared binder into the DXPJ fast mixer, add Shangdian powder (280#~300#) while stirring, and stir at high speed for 15 minutes. If there is slurry splashing, the speed can be appropriately reduced. Then stir for at least 45 minutes at a low speed stirring speed, measure out the fast penetrating agent T (accounting for 0.2% of the weight of silica sol) and antifoaming agent (accounting for 0.2% of the weight of silica sol), and add the same volume of industrial alcohol to dilute , add the surface layer slurry. After the stirring was stopped, the measured specific gravity of the slurry was 2.1, and the viscosity of the slurry was 26.

[0053] 3 Surface layer sanding Use 70-mesh Shangdian sand for surface layer sanding, drying time ...

Embodiment 2

[0061] 1 Binder preparation Mix GRJ-30 silica sol with a pH range of 9 to 11 and distilled water or (purified water) at a ratio of 10:1, and the slurry can be prepared after sufficient stirring.

[0062] 2 Surface layer slurry preparation Pour the prepared binder into the DXPJ fast mixer, add Shangdian powder (280#~300#) while stirring, and stir at high speed for 15 minutes. If there is slurry splashing, the speed can be appropriately reduced. Then stir for at least 45 minutes at a low speed, measure out the fast penetrating agent T (0.2% of the weight of the silica sol) and the defoamer (0.2% of the weight of the silica sol), and add the same volume of industrial alcohol to dilute , add the surface layer slurry. After the stirring was stopped, the measured specific gravity of the slurry was 2.3, and the viscosity of the slurry was 28.

[0063] 3 Surface layer sanding Use 70-mesh Shangdian sand for surface layer sanding, drying time is 10 minutes, and the number of layers is 1...

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Abstract

The invention discloses a manufacturing method of a fired mold precision cast aluminum alloy case. The method includes the following steps: 1) blending binder; 2) preparing surface layer slurry; 3) sanding on a surface layer; 4) preparing transition surface layer slurry; 5) sanding on a transition layer; 6) preparing reinforcing layer slurry; 7) sanding on a reinforcing layer; 8) preparing sealing layer slurry; 9) drying a sealing layer. According to the method, mullite sand which is cheap is used, purchasing is convenient, proportioning is easy, and the surface quality and the size accuracy of a mold shell and even a final cast piece can be greatly improved.

Description

technical field [0001] The invention relates to an aluminum alloy investment casting technology, in particular to a shell-making method in the investment precision casting process, and is especially suitable for the production method of various aluminum alloy castings with high requirements on dimensional accuracy and surface. Background technique [0002] With the rapid development of high-tech fields represented by aviation, aerospace, and automobile industries, higher requirements are put forward for the integration, lightweight, and reliability of various aluminum alloy components. At the same time, on the premise of meeting the metallurgical performance requirements, higher requirements are put forward for the dimensional accuracy and surface quality of complex castings. At home and abroad, the casting method of precision molding is mainly used to realize the molding and other requirements of castings. [0003] In addition to the quality of the wax pattern, the choice ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04
Inventor 朱鹏超薛祥义常辉狄玮岚王金龙周中波
Owner XIAN SUPERCRYSYAL SCI TECH DEV CO LTD
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