Vacuum negative pressure casting process of foam die casting piece

A vacuum negative pressure and casting technology, which is applied in the direction of casting molding equipment, casting molds, manufacturing tools, etc., can solve the problems of unsatisfactory strength and poor finish of castings, and achieve the effects of improving compactness, increasing service life and high strength

Inactive Publication Date: 2005-11-30
如皋市超达模具配套有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the existing foam plastic mold castings are cast, due to the limitation of process conditions and other factors, the smoothness of the castings is poor and the strength is not ideal

Method used

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  • Vacuum negative pressure casting process of foam die casting piece
  • Vacuum negative pressure casting process of foam die casting piece

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0018] A vacuum negative pressure casting method for foam plastic mold castings is characterized in that it comprises the following steps:

[0019] ① Fix the model 1 to the suction box 2 first, and the suction box 2 starts to vacuum;

[0020] ②The plastic film 3 is heated and covered on the model 1, and the gate 4 is set on the film 3;

[0021] ③ spray paint layer 5 on the surface of film 3, and dry paint layer 5;

[0022] ④ Place a sand box 7 on the mold plate 6, fill the sand box 7 with dry sand 8, then use a vibrating table 9 to vibrate the sand, and cover the sand box 7 with a sealing film 10;

[0023] ⑤ Vacuumize the sand box 7 so that the surface hardness of the sand mold reaches about 95 (example 90-98), and then the mold is ejected to obtain the cavity;

[0024] ⑥ Obtain the lower cavity according to the same method as above ①~⑤, but there is no gate in step ②;

[0025] ⑦ Combine the upper and lower cavities and cast from the gate 4, while the upper and lower caviti...

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Abstract

The invention discloses vacuum negative-pressure casting method for sop plastic mould cast, which comprises steps: fix the mould on pull box, heat and cover the plastic membrane on the mould, spray coating layer on membrane surface, put casting box covered with seal membrane, take vacuum treatment for casting box to harden its surface; then, draw mould, obtain and combine upper-down cavity, cast on the casting gate, demould to get the cast. This technique is simple, easy to operate; the product has high intensity, high precision size and easy to demould.

Description

Technical field: [0001] The invention relates to a casting method of a membrane casting. Background technique: [0002] When the existing foam plastic mold castings are cast, due to the limitation of technological conditions and other factors, the smoothness of the castings is relatively poor, and the strength is not ideal. Invention content: [0003] The object of the present invention is to provide a vacuum negative pressure casting method for foam plastic mold castings with good smoothness, good dimensional accuracy, good quality, long service life of the model and easy operation. [0004] Technical solution of the present invention is: [0005] A vacuum negative pressure casting method for foam plastic mold castings is characterized in that it comprises the following steps: [0006] ①Fix the model to the suction box first, and the suction box starts to vacuum; [0007] ②The plastic film is heated and covered on the model, and the gate is set on the film; [0008] ③...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/00
Inventor 冯建军
Owner 如皋市超达模具配套有限公司
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