Qingyun Hongsheng Machinery Parts Co., Ltd. is one of the most reliable manufacturers and suppliers of high-temperature resistant coated sand castings in China. We warmly welcome you to wholesale high quality high-temperature resistant coated sand castings at low price from our factory. If you have any enquiry about quotation, please feel free to email us.
Molding sand or core sand whose surface of the sand grains is coated with a layer of solid resin film before molding. There are two coating processes: cold method and hot method. In the cold method, the resin is dissolved with ethanol and urethane is added during the sand mixing process to coat the surface of the sand grains. The ethanol evaporates to obtain coated sand. The thermal method involves preheating the sand to a certain temperature, adding resin to melt it, stirring to coat the surface of the sand grains with resin, adding urotropine water solution and lubricant, cooling, crushing and sieving the coated sand. Used for cast steel parts and cast iron parts
Products Description
Advantages of Coated Sand
1. High precision: Castings made of coated sand feature high precision and good surface quality, and are less prone to defects.
2. Good thermal stability: Coated sand can withstand high temperatures without thermal deformation or cracking, and the size and shape of the castings can also remain stable.
3. Strong durability: The specially treated coated sand has relatively high thermal stability and compressive strength, and can be reused multiple times, significantly reducing production costs.
4. Wide application range: Coated sand is suitable for the casting of metals such as iron, steel, copper and aluminum, as well as non-metals such as ceramics and glass, and has great flexibility.
Disadvantages of Coated Sand
1. High manufacturing cost: The production of coated sand requires the use of special chemicals for treatment, resulting in relatively high production costs.
2. High toxicity: The chemicals used in the production of coated sand, such as phenolic resin and polyurethane, have certain toxicity to the environment and human health.
3. Inability to manufacture large-sized castings: Due to the physical properties of coated sand, the castings produced are relatively small in size and cannot meet the manufacturing requirements of large workpieces.
Applicable Scenarios
The manufacturing of castings that require high precision and good surface quality.
2. Manufacturing of castings that require high thermal stability, such as those involving high temperatures or high pressures.
3. Mass-produce relatively small-sized castings.
High-temperature resistant coated sand castingsproduced by our company are highly trusted by customers
| Grades and chemical compositions of heat-resistant cast iron | |||||||
| Cast iron grade | Chemical composition (mass fraction, %) | ||||||
| C | Si | Mn | P | S | |||
| 不大于 | Cr | Al | |||||
| RTCr | 3.0~3.8 | 1.5~2.5 | 1.0 | 0.10 | 0.08 | 0.50~1.00 | |
| RTCr2 | 3.0~3.8 | 2.0~3.0 | 1.0 | 0.10 | 0.08 | >1.00~2.00 | |
| RTCr16 | 1.6~2.4 | 1.5~2.2 | 1.0 | 0.10 | 0.05 | 15.00～18.00 | |
| RTSi5 | 2.4~3.2 | 4.5~5.5 | 0.8 | 0.10 | 0.08 | 0.5~1.00 | |
| RQTSi4 | 2.4~3.2 | 3.5～4.5 | 0.7 | 0.07 | 0.015 | 一 | |
| RQTSi4Mo | 2.7～3.5 | 3.5~4.5 | 0.5 | 0.07 | 0.015 | Mo0.3~0.7 | |
| RQTSi4Mol | 2.7~3.5 | 4.0~4.5 | 0.3 | 0.05 | 0.015 | Mo1.0~1.5 | |
| RQTSi5 | 2.4~3.2 | >4.5~5.5 | 0.7 | 0.07 | 0.015 | 二 | |
| RQTAl4Si4 | 2.5~3.0 | 3.5~4.5 | 0.5 | 0.07 | 0.015 | 一 | 4.0～5.0 |
| RQTAI5Si5 | 2.3~2.8 | >4.5~5.2 | 0.5 | 0.07 | 0.015 | 一 | >5.0~5.8 |
| RQTAI22 | 1.6~2.2 | 1.0~2.0 | 0.7 | 0.07 | 0.015 | 一 | 20.0~24.0 |
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why choose us
Quick response Products with high cost performance Products with high cost performance
why choose our products
1. 20 years of experience in casting cast iron plate, quality assurance, timely delivery
2. Perfect machining and inspection equipment can directly provide finished parts and meet the inspection requirements of customers
3. It has independent import and export rights and can export products to all parts of the world
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