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Method for casting cast broken wall and rolling mortar wall evaporated pattern

A production method and technology of lost foam, applied in the field of casting modeling, can solve the problems of immature casting, many casting defects, large gas generation, etc., and achieve the effect of improving quality, stability and quality

Inactive Publication Date: 2013-09-11
湖州双金机械配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The production of foam plastic gasification mold (lost foam) is an important step in lost foam casting. Now the lost foam production method is generally bonding molding. A large amount of glue is required in the bonding process, and a large number of bubbles will be generated during the casting process, which will affect the quality of the casting.
Especially the bonded lost foam of the casting broken wall and the rolling wall, due to the large amount of gas generation, there are many casting defects, and the casting is immature.

Method used

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  • Method for casting cast broken wall and rolling mortar wall evaporated pattern
  • Method for casting cast broken wall and rolling mortar wall evaporated pattern

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] SJ1400 broken wall lost foam production

[0030] Foam 3kg of polystyrene in a foaming machine, the temperature is controlled at 90-100°C, the air pressure is controlled at 0.6-0.8MPa, the time is 5 minutes, the specific gravity of the foam is 17g / liter; the foam is left to stand in the air for 8-10 Hours, then molded with a foam molding machine, the temperature is controlled at 100-110°C, the air pressure is controlled at 0.6-0.8MPa, and the time is 10 minutes. One-time molding is made into the lost foam of the casting broken wall, and finally the lost foam is dried. The temperature is 35-40℃, and the drying time is 24-30 hours. The manufactured SJ1400 broken wall lost foam has an upper diameter of 1300mm and a lower diameter of 307mm.

Embodiment 2

[0032] SJ1400 Rolling Mortar Wall Lost Foam Fabrication

[0033] Foam 3.5kg of polystyrene in a foaming machine, the temperature is controlled at 90-100°C, the air pressure is controlled at 0.6-0.8MPa, the time is 5 minutes, and the specific gravity of the foam is 17g / liter; the foam is left to stand in the air for 8- After 10 hours, use a foam molding machine to form, the temperature is controlled at 100-110°C, the air pressure is controlled at 0.6-0.8MPa, and the time is 11 minutes. The lost foam of the casting rolling wall is formed at one time, and finally the lost foam is dried. The drying temperature is 35-40°C, and the drying time is 30-36 hours. The manufactured SJ1400 broken wall lost foam has an upper diameter of 1409mm and a lower diameter of 814mm.

Embodiment 3

[0035] SJ1650 broken wall lost foam production

[0036] Foam 4kg of polystyrene in a foaming machine, the temperature is controlled at 90-100°C, the air pressure is controlled at 0.6-0.8MPa, the time is 5 minutes, the specific gravity of the foam is 18g / liter; the foam is left to stand in the air for 8-10 Hours, and then molded with a foam molding machine, the temperature is controlled at 100-110°C, the air pressure is controlled at 0.6-0.8MPa, and the time is 12 minutes. One-time molding is made into the lost foam of the casting broken wall, and finally the lost foam is dried. The temperature is 35-40℃, and the drying time is 24-36 hours. The manufactured SJ1400 broken wall lost foam has an upper diameter of 381.3mm and a lower diameter of 1563mm.

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Abstract

The invention relates to a method for casting a cast broken wall and rolling mortar wall evaporated pattern. The method comprises the following steps: foaming polystyrene in a foaming machine for 5 minutes, wherein the temperature is controlled to be 90-100 DEG C, and the air pressure is controlled to be 0.6-0.8MPa, and the foam specific gravity is 17-18g / L; standing the foam in air for 8-10 hours, molding by using a foam molding machine, wherein the temperature is controlled to be 100-110 DEG C, and the air pressure is controlled to be 0.6-0.8MPa; casting the cast broken wall and rolling mortar wall evaporated pattern through one-step molding, and finally drying the evaporated pattern. By employing the one-step molding technical method, the labor force is reduced, the product quality is improved, and the cast yield is improved.

Description

technical field [0001] The invention belongs to the technical field of casting modeling, and relates to a method for manufacturing lost foam of casting broken walls and rolling mortar walls. The technical method of one-time molding is beneficial to reduce labor force, improve product quality, and increase the yield of castings. Background technique [0002] Lost foam casting, also known as dry sand solid mold negative pressure casting, is called EPC abroad. It is one of the most advanced casting processes in the world at present. It is known as a "revolution" in the history of casting. It is called the 21st century at home and abroad. Green casting. [0003] The production principle of lost foam casting: This method first makes a foam plastic model according to the process requirements, coats it with a special high-temperature resistant coating, after drying, puts it in a special sand box, and then fills it with dry sand according to the process requirements, and uses three-...

Claims

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Application Information

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IPC IPC(8): B22C7/02B29C44/02
Inventor 韩炎鑫吴维根
Owner 湖州双金机械配件有限公司
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