Precoated sand mold for copper piece casting and copper piece casting method

A technology for coating sand and copper parts, which is applied in casting molding equipment, molds, mold components, etc., to achieve the effect of improving utilization rate, improving internal quality, and reducing environmental pollution

Inactive Publication Date: 2016-06-01
赵景涛
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In view of the above problems, the present invention provides a film-coated sand mold and a copper casting method for casting copper parts. The production efficiency of the film-coated sand mold of the present invention is high, and it is suitable for the production and manufacture of copper parts with various complex configurations. The utilization rate and yield of copper casting materials produced are high, and can effectively avoid the defect of slag inclusion in the casting, and also lay a good foundation for the next step of finishing

Method used

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  • Precoated sand mold for copper piece casting and copper piece casting method
  • Precoated sand mold for copper piece casting and copper piece casting method
  • Precoated sand mold for copper piece casting and copper piece casting method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A coated sand mold for copper casting, see figure 2 , image 3 , including several casting cavities, two casting liquid channels, a slag-avoiding inner core and a sprue channel; the two casting liquid channels are distributed on both sides of the sprue channel, and the lower ends of the three are connected through the slag-avoiding inner core; The casting cavity is distributed around the casting solution channel and communicated with the casting solution channel; the position of the slag avoiding inner core is lower than the casting solution channel; the upper end of the sprue channel is higher than the casting cavity.

Embodiment 2

[0030] A film-coated sand mold for copper casting, including several casting cavities, a casting liquid channel, a slag-avoiding inner core and a sprue channel; the casting liquid channel and the sprue channel are arranged vertically, and the lower ends of the two It communicates through the slag-avoiding inner core; the casting cavity is distributed around the casting liquid channel and communicates with the casting liquid channel; the position of the slag-avoiding inner core is lower than the casting liquid channel; the upper end of the spout channel is higher in the casting cavity.

Embodiment 3

[0032] The method for casting copper parts using the coated sand mold of Example 1 includes the following steps (taking the isolation knife seat equipped with the ZW32 vacuum circuit breaker as an example):

[0033] Make a coated sand mold according to the structure, and then pour copper liquid. The casting temperature of pure copper is controlled at 1180°C. During casting, the flow control principle of slow first and then fast should be followed. After pouring is completed, cool and form, and remove the sand mold to make.

[0034] After finishing the finished product, carry out the following operations to further refine the product:

[0035] (1) Intermediate processing

[0036] After solidification and cooling, the sprue is removed, and the surface of the casting is sandblasted to obtain the blank of the tool seat;

[0037] (2) Cold extrusion molding

[0038] Put the blank of the tool seat that has been sandblasted on the surface into the hard metal inner core with a diame...

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PUM

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Abstract

The invention discloses a precoated sand mold for copper piece casting. The precoated sand mold comprises casting cavities, a casting liquid channel, a slag avoiding inner core and a casting nozzle channel. The casting cavities are distributed around the casting liquid channel and communicated with the casting liquid channel. The slag avoiding inner core is communicated with the bottom of the casting liquid channel and the bottom of the casting nozzle channel, and the position of the slag avoiding inner core is lower than that of the casting liquid channel. The invention further provides a copper piece casting method. The copper piece casting method comprises the steps that the precoated sand mold is manufactured; then casting is carried out; the casting temperature of pure copper is controlled to range from 1,150 DEG C to 1,200 DEG C, and the casting temperature of copper alloy is controlled to range from 950 DEG C to 1,050 DEG C; casting is carried out based on the flow control principle of carrying out casting slowly and then carrying out casting fast; and after casting is finished, cooling molding is carried out, and the sand mold is removed. The precoated sand mold is high in production efficiency, a produced copper casting material is high in material utilization rate and rate of finished products, the defect of slag inclusion in the casting can be effectively overcome, and a good foundation is laid for next finish machining.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a film-coated sand mold for copper casting and a copper casting method. Background technique [0002] Before 2006, copper castings have been using ordinary sand mold casting method, and then machined. Due to the defects of ordinary sand mold such as rough process and low strength, it is easy to cause problems such as sand inclusion and box expansion, so the yield of castings is less than 85%. And due to the reserved sprue of the casting and the excessive machining allowance, the utilization rate of the material is less than 25%. In addition, this kind of products has the disadvantages of complex processing technology, high processing difficulty, difficult to control the processing size, high surface roughness and low hardness of the product, and the processing cost is naturally high. [0003] After 2008, a new processing technology replaced the original casting proce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/20B22C9/02B22C9/08
CPCB22C9/02B22C9/082B22C9/20
Inventor 赵景涛
Owner 赵景涛
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