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Coated sand: installation requirements for safety valves on boilers

Coated sand: The installation requirements for safety valves on boilers should comply with the following requirements: (1) For boilers with a rated evaporation capacity greater than 0.5t/h, at least two safety valves should be installed: for boilers with a rated evaporation capacity less than or equal to 0.5t/h, at least one safety valve should be installed. Safety valves must be installed at the outlet of the separable economizer and the outlet of the steam superheater.

Cracks in Shell Molding of Coated Sand Lamination Molding

Question: Our company has recently adopted a laminated sand box model to produce a foreign trade fork type product, with a maximum wall thickness of 24 and a minimum thickness of 14. We use a 9-layer stacked box to produce 8-layer workpieces, with a total height of 400 after stacking. A pressure iron is placed on top, and dry sand is used to enclose the box outside. After pouring, the sand is removed, and cracks are found in the shell shape and flash edges appear on the workpiece. Who has encountered this problem and how to solve it?

Advantages of film covered Sand casting process and technical advantages

Advantages of film coated Sand casting technology: with the rising prices of raw and auxiliary materials and labor, and the profit margin of casting commodities, there has always been a downward trend. It is necessary to search for low-cost, convenient and useful casting technologies to replace traditional technologies.

Cast steel coated sand has comprehensive casting performance

Cast steel coated sand is a new type of coated sand product with excellent high-temperature performance and comprehensive casting performance. Cast steel coated sand has the characteristics of high strength, good flowability, fast solidification speed, high SiO2 content, strong high-temperature resistance, low gas generation, and good flowability. It is a widely used molding material for steel castings such as valve shells, buffer joints, steel shafts, engineering excavators, and container corners.

Comparison between film coated Sand casting and sodium silicate investment casting

With the continuous increase in raw material and labor prices, as well as the annual decline in the prices of low-level investment casting products, the profit margin of water glass investment casting products with lower precision requirements has been showing a downward trend. Most investment casting factories that use water glass technology are facing issues of product upgrading and process transformation.

Deformation problem of coated sand core after mold removal

Question: May I ask if the coated sand core will deform due to different wall thicknesses at different locations after being removed from the core injection mold, resulting in different cooling rates at different locations? Is this possible? By the way, the sandblasting rod generated at the sandblasting hole is usually knocked off after taking out the mold. This can cause the surface of the sandblasting core to be rough, resulting in low surface strength. If the molten iron has a significant impact on this position, I think it is easy to sandblasting, leading to sand inclusion defects. How do you generally prevent this situation?

产品标签

Hose

Hydraulic hose

Coated sand

No public

Douyin

Nantong Maylead Technology Co., Ltd.

Coated sand contact: 86-15962297575 (Xu Tao)

Hydraulic hose contact: 86-13646245739 (Zhang Jianwei)

E-mail: info@maylead.com.cn

Add: No. 389 Zhuhai Road, Binjiang Street, Economic Development Zone, Haimen City, Jiangsu Province

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