Precoated sand casting is a casting process, which refers to first coating a layer of special plastic film with good adhesion on the surface of the sand mold (that is, film), and then covering the film with a layer of sand. Compared with traditional sand casting, this process can reduce the surface defects of castings and improve the precision and surface quality of castings. At the same time, since the coating can prevent the moisture in the mold from volatilizing, it can also improve the mechanical properties of the casting. Coated sand casting is widely used in aviation, automobile, machinery and other fields.
We are the manufacturer
Precoated Sand Casting parts
The precoated sand casting part preparation process
Precoated sand casting is a casting process that uses a film covering the surface of the cavity to prevent molten metal from contacting the sand mold in order to reduce mold surface defects and improve casting quality.
Specific steps are as follows:
1. Preparation of sand molds: use special sand materials to prepare sand molds. This kind of sand can maintain good strength at high temperatures and has good air permeability and lubricity.
2. Apply the film: Spread the film on the surface of the sand mold so that it adheres evenly to the surface of the sand mold. Films are usually made of polypropylene, polyethylene, or other materials.
3. Prepare the mold: cover the mold shell on the sand mold to form a closed mold cavity. Molds can be metal, ceramic or other materials.
4. Casting: Pour molten metal into the mold cavity and keep it in a liquid state for a certain period of time, so that the molten metal fills every corner of the cavity.
5. Cooling and cleaning: After the casting is cooled, remove the mold shell and take out the casting. The casting surface is then cleaned of sand and other impurities by machine or manually.
Precoated Sand Casting Advantage:
1. Improve the surface quality of castings: coated sand casting can effectively prevent defects such as pores and slag inclusions, thereby improving the surface quality of castings.
2. Improve the dimensional stability of castings: coated sand casting can control the shrinkage of castings, thereby improving the dimensional stability of castings.
3. Improve production efficiency: Coated sand casting can effectively improve production efficiency, because it can dry and solidify quickly, and can be used many times.
4. Cost reduction: coated sand casting does not require casting molds, so it can reduce the cost of mold making, and at the same time, because of the good quality of castings, it can also reduce the cost of post-processing.
5. Strong applicability: coated sand casting can be applied to various metal castings, such as aluminum alloy, copper alloy, iron and other materials, and has strong applicability.
Hot Tags: precoated sand casting, China precoated sand casting manufacturers, suppliers, factory, Stainless Steel Cnc Milling, precision investment casting factory, Stainless Steel Pipe Fittings, Precision CNC Milling Parts Manufacturer, steel precision casting, OEM Machining Parts
