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Precoated sand mold for casting stainless steel thin-walled workpiece

A technology of thin-walled parts and coated sand, which is used in manufacturing tools, casting equipment, casting molds, etc., can solve the problems of high production cost, cold isolation, shrinkage, cracks, etc., and achieve good casting surface quality and high temperature. The effect of good collapsibility and excellent concession

Inactive Publication Date: 2016-06-15
张建
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of investment casting: investment casting has many processes and complex production process, it needs to consume more auxiliary materials, fuel and power, and the production cost is relatively high
[0005] Problems that are prone to occur in thin-walled stainless steel castings: thin-walled stainless steel; steel castings are prone to cracks during the production process; cold shrinkage cavities; wrinkled skin; insufficient pouring and sand pore defects

Method used

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  • Precoated sand mold for casting stainless steel thin-walled workpiece
  • Precoated sand mold for casting stainless steel thin-walled workpiece
  • Precoated sand mold for casting stainless steel thin-walled workpiece

Examples

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Embodiment Construction

[0039] As shown in the figure, make a coated sand shell model according to the casting drawing, divided into bottom mold; middle mold; cover mold. The cover mold, middle mold and bottom mold are arranged in order from top to bottom, and a vertical sprue vertically penetrating through the film-coated sand shell is provided in the middle of the shell mold of the cover mold, middle mold and bottom mold; the vertical sprue is cylindrical and connects three One mold, the vertical runner in the cover mold is connected with the sprue cup on the top of the cover mold, and the tail end of the vertical runner in the bottom mold is blocked. The casting cavity is distributed symmetrically on both sides of the runner, and a part of the cavity is opened in the two adjacent molds up and down to form a complete casting cavity. The casting cavity is 4, 8, 12, and 16 The rectangles are distributed on both sides of the vertical sprue. The vertical sprue avoids direct connection with the secondar...

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Abstract

The invention discloses a precoated sand mold for casting a stainless steel thin-walled workpiece. The precoated sand mold comprises a cover mold, at least one intermediate mold and a bottom mold, which are arranged in order from top to bottom, wherein casting cavities are formed between the adjacent molds; a communicated vertical runner is formed in the cover mold, the intermediate mold and the lower mold; one end of the vertical runner is arranged on a pouring gate on the cover mold, and the other end blocks the bottom mold; the vertical runner is communicated with a transverse runner; the transverse runner is communicated with the casting cavities through auxiliary runners; the casting runners are communicated with exhaust vents. With adoption of the precoated sand mold disclosed by the invention, the stainless steel casting with the thickness of 2-3 mm can be casted; the casting is not liable to crack; the finished product yield is high.

Description

technical field [0001] The invention relates to a coated sand mold, in particular to a coated sand mold for casting stainless steel 2-3mm thin-walled parts. Background technique [0002] At present, investment casting is mostly used for thin-walled castings. Investment casting first needs to make metal molds, press the wax molds with metal molds on the wax injection machine, combine the individual wax molds to the casting system to form wax trees, and coat the wax trees with multi-layer refractory materials. After drying and hardening, the mold shell is formed, and then the wax in the mold shell is melted to make it flow out, and then the mold shell is roasted to make it firm, and finally the molten liquid metal is cast into the mold shell, and the liquid metal is cooled and solidified in the mold shell That is, it becomes the required casting. [0003] Advantages of investment casting: investment casting adopts hot shell casting, which can produce thin-walled castings. Th...

Claims

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Application Information

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IPC IPC(8): B22C9/22B22C9/02B22C9/08
CPCB22C9/22B22C9/02B22C9/082
Inventor 张建
Owner 张建
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