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Method for casting miodle trough casting of coal mine scraper conveyor using demould

A technology of scraper conveyor and lost foam casting, which is applied in the direction of casting molding equipment, molds, mold components, etc., can solve the problems of poor finish, high production cost, non-wear resistance, etc., so as to prolong the service life and reduce the production cost. Low, increased wear resistance effect

Inactive Publication Date: 2007-02-14
冯玉全
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AI Technical Summary

Problems solved by technology

[0002] At present, the existing coal mine scraper conveyor middle trough is divided into two categories, one is the middle trough of small coal mine scraper conveyor, which is welded with rolled E-shaped steel and steel plate (such as SGW-40T, SGW-80T type Coal mine scraper conveyor), so the welded middle groove is not wear-resistant and has a short life in mine use, and the material is high-quality steel, which is more expensive, has higher production costs, and is more wasteful; the other type is a large coal mine scraper The trough in the middle of the conveyor is sand cast, and the trough parts produced by this process have low density and poor finish

Method used

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Embodiment Construction

[0010] 1. Mold: It can be divided into two ways. One is to fill the mold with pre-foamed polystyrene (EPS) after curing into the casting mold of the middle groove of the scraper conveyor, and then take the mold out of the mold and put it into the mold. Drying in the drying room, the drying temperature is 40 ° C, drying for 5 hours; the second is to cut the polystyrene (EPS) board according to the model, and combine it into a shape;

[0011] 2. Spraying paint and drying: spray paint on the mold three times, the thickness of each spray paint is 0.3-0.5mm, dry in a drying room at 55 ℃ for 4-5 hours, the total thickness of three spray paint is 1.2-1.5mm mm, the total drying time is 12-15 hours in a drying room at 55°C. The paint is mixed with binder and aggregate. The binder is composed of modified starch, latex, bentonite, preservatives, etc., accounting for 10% of the total amount. The aggregate is composed of quartz powder, aluminum alum It is composed of soil, chromium ore po...

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Abstract

The present invention discloses vanish mold casting process of middle channel casting. The vanish mold casting process includes the following steps: 1. forming casting mold through filling cured foamed polystyrene into mold and stoving casting mold; 2. spraying paint onto the casting mold and drying at 55 deg.c for 12-15 hr to form coating of 1.2-1.5 mm thickness; 3. setting the casting mold into sand box, filling mold sand, vibrating in vibrator to densify and covering the upper port of the sand box with plastic film; and 4. casting through turning on the vacuum pump, pouring molten steel, shaking out sand after cooling for 1 hr, cleaning and spraying paint. The present invention has the following features: main material comprising waste steel and small amount of alloy elements resulting in low cost, precise size, smooth surface and high carbon layer formed in the surface of casting resulting in raised wear resistance and long service life.

Description

Technical field [0001] The invention belongs to the technical field of foundry machinery, in particular, it relates to a method for casting a middle trough of a coal mine scraper conveyor by lost foam casting. Background technique [0002] At present, the existing coal mine scraper conveyor middle trough is divided into two categories, one is the middle trough of small coal mine scraper conveyor, which is welded with rolled E-shaped steel and steel plate (such as SGW-40T, SGW-80T type Coal mine scraper conveyor), so the welded middle groove is not wear-resistant and has a short life in mine use, and the material is high-quality steel, which is more expensive, has higher production costs, and is more wasteful; the other type is a large coal mine scraper The trough in the middle of the conveyor is sand-cast, and the trough parts produced by this process have low density and poor finish. Contents of the invention [0003] The object of the present invention is to solve the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04B22D18/06
Inventor 冯玉全张国祥
Owner 冯玉全
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