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Craft manufacturing flow for lost-wax casting value body with more than 8-inch caliber

A wax pattern making and valve body technology, applied in the directions of casting molds, casting mold components, manufacturing tools, etc., can solve the problems of easy cracking and falling off, damage to wax patterns, and bulky wax patterns, so as to achieve good product quality and small error in shape and position. , the effect of high yield

Active Publication Date: 2012-11-07
江苏万恒铸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the process problems such as bulky wax pattern, difficult turning over, easy cracking, falling off and damage to the wax pattern, and specially provides a production process of a lost-wax precision casting valve body with a diameter of 8 inches or more

Method used

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  • Craft manufacturing flow for lost-wax casting value body with more than 8-inch caliber

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0011] The manufacturing process of the lost wax precision casting valve body with a caliber of more than 8 inches of the present invention is as follows:

[0012] 1. Wax model production: first make an 8-inch valve body wax model, and strengthen the rib 2 on the side of the wax flange of the valve body 1 to increase the strength. The size is a wedge semicircular, and the upper mouth thickness is equivalent to the thickness of the valve 1 flange. The radius of the semicircle is about 75% of the radius of the flange, and the upper boss is 100×90×100mm. Then make the feeding block 3, the feeding block 3 is 200×200×100mm, and the cross-section of the connecting runner is 100×100mm. Finally, an integral wax model is made, and the valve body and the reinforcing rib are integrally molded by the integral model. The feeding block 3, the sprue cup 4, the wax handle cup 5, and the air outlet 7 are integrally molded by integral molding. Separate sprue is 150×120×150mm.

[0013] 2. Coating ...

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Abstract

The invention provides a craft manufacturing flow for lost-wax casting a value body with a more than 8-inch caliber, aiming to solve the craft difficult problems that a wax form is heavy, is difficult to turn, is easy to be damaged by cracking and shedding and the like. The invention adopts reinforcing ribs to enhance the strength of the value body and enlarge a welding contact area of a running gate system. The invention has simple manufacturing, high finished product ratio, good quality and the like; the product has smooth and beautiful appearance, stable size and small morpheme error; and shooting shows that the inner part of the product has no crack and shrinkage porosity phenomena, thus reaching the over second-level RT requirement.

Description

Technical field [0001] The invention relates to a manufacturing process of a lost wax precision casting valve body with a caliber of more than 8 inches. Background technique [0002] Valves over 8 inches are widely used in all kinds of infrastructure pipelines. At present, the production of valve body blanks mainly adopts sand casting. The shape and position errors are large, the surface is rough, the internal defects are many, and the organization has shrinkage and looseness. And the rate of authenticity is low. Summary of the invention [0003] The purpose of the present invention is to solve the technical problems of heavy wax mold, difficulty in turning, easy cracking and falling off and damaging the wax mold, and especially provides a manufacturing process of lost wax precision casting valve body with a caliber of more than 8 inches. [0004] The present invention is achieved through the following technical solutions: it includes three production processes, wax model making-co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/04
Inventor 陈德苏赵爱民
Owner 江苏万恒铸业有限公司