3, can not afford to shell layer, good thermal stability, good thermal conductivity, good liquidity, the casting surface; a vibration sand, high strength, low gas, low expansion; 2, lax, good casting surface finish smooth; 4, high strength, high temperature, low inflation, good mold release, anti-sticky sand is good; 5, the shell is not uniform shelling, curing speed; coated sand regeneration and quality control with the human continually improving the environmental requirements, the coated sand recovery and regeneration becomes more and more important and urgent. The most commonly used method of mechanical recycling and renewable thermal regeneration. The basic principles of mechanical reproduction is the use of high-speed rotors wheels (approximately 3500r / min) and the slow rotation of the rotary frame gap between the (5-10mm) friction of the old sand, coated sand regeneration factory, in order to achieve the removal resin sand surface and sand shaping purposes, coated sand, dust generated is processed through the ventilation dust handmade wet coated sand: the coated sand wet compressive strength in 0.1-0.3MPa within any adjustments. Stored for more than three months for hand molding or core system (similar to tung oil sand Hop fat sand), in a release room temperature, the type of (core) placed in a heating oven or oven, heating temperature 250-350 ℃, coated sand recycling equipment, the heating time 3-10min, type (core) after curing has high strength, low gas evolution, creep deformation amount, does not absorb moisture and so on. The coated sand suitable for single piece, small batch and high precision castings, coated sand production line, particularly suitable for township enterprises to adopt. To put heating is worth noting that in type (core) heat cured, you must wait for the furnace to reach the desired temperature, avoid heating the furnace temperature coated sand | Qingdao Heng | coated sand reclamation business days from Qingdao Heng Machinery Limited. Coated Sand | Qingdao Heng | coated sand regeneration business Qingdao Heng Machinery Co., Ltd. (www.thjidian.com) this year introduced a new upgrade, the above picture is for reference only, please call the contact phone book page or image on the obtain the latest information, contact: Liu promotion.