The regeneration and reuse of cast steel coated sand. Coated sand is renewable, and regeneration is mostly done by thermal method, followed by mechanical impact friction method. Is the investment in equipment for treating waste sand from coated sand large? In terms of land area and manpower, according to my understanding, only unit coated sand factories in China are independently recycling and processing, because the cost of recycling and processing is difficult to control, and it is more expensive than the original sand. At this time, it is unclear what is going on. If the transportation cost is high, it is usually abandoned.
Regenerated coated sand is the equipment and technology used by advanced operators to treat and process the waste sand before calcination, so that it can once again have operational functions and value. Silicon sand can be recycled as the foundation material for coated sand or other sand products. The back mold and static mold of the coated sand casting bearing seat are not accepted or are not on the same axis. When locking the mold, it is fixed under the pressure of the cylinder or cylinder. There is a slope before sales, and the mold is still very tight. However, when the mold comes out, the rear mold and static mold will still be repaired to their original state, causing the sand core of the mining machinery coated sand casting to break or deform.
Reply: If taken out too early, the resin may deform or crack due to incomplete drying and still in a plastic state. Therefore, as long as the agricultural machinery parts are coated with sand casting to ensure sufficient heating time, it is sufficient. Whether the heating time is sufficient or not depends on the color tone of the core shaft, whether it is "raw" or "cooked". This is not a problem with cooling speed. There is a difference in deformation between the casting and it. For hot core boxes, the deformation of each sand core city varies only based on the different deformation amounts of structure and strength. Think about the shrinkage of the sand core from 200 degrees Celsius to room temperature in the city. If the shrinkage is uneven and the strength is insufficient, it will deform; Just like the water cooler core of the cylinder head, the oil passage core (thin) and four integrated air passages are deformed, 1-2mm, and the tooling can only be calibrated at temperature.
