This equipment is mainly suitable for cooling clay sand and old sand. Fully stir and mix the old sand to ensure uniform temperature, humidity, and composition. While cooling, complete the pre mixing process to prepare high-quality molding sand. The equipm
1. The reverse rotating crosshead drives ten scraper plates to evenly mix the materials, and the bottom surface of the mixing component is made of wear-resistant ceramic material; 2. High pressure blowing keeps the old sand in a boiling state, resulting
If the temperature of the sand recycled in casting exceeds 71 ℃, it is considered hot sand. Moreover, when the temperature of the old sand is between 48.8 ℃ and 71 ℃, incompatibility will occur during the mixing process, making it difficult to ensure the quality of the mixed sand. Assuming that the recovered hot sand cannot be effectively cooled and quickly reused in the molding production of the molding machine, it will lead to varying degrees of defects in the castings produced. The double disc stirring and cooling machine is a key equipment that cools the high-temperature old sand recovered from casting at a fast speed to a suitable mixing temperature for the sand mixer. Under normal circumstances, this equipment is used in a wet sand treatment system with an efficiency of 40 tons per hour for old sand treatment.
When the high-temperature hot sand that has been crushed and recycled after pouring is sieved by a drum and humidified with water, the humidified (moisture content is about 4-5%) hot old sand is fed into the machine body through the feeding port. Each sand flow will stay in the machine for 2 minutes and be fully stirred and move in two circular shapes inside the plate. At the same time, a blower is installed at the lower end of the right wall of the cooling box, The outlet of the blower is connected to the ventilation holes arranged on the inner side of the cooling box near the bottom of the tank through air ducts. During stirring, the blower blows cold air into the cooling box to exchange heat with the sand. The hot air is discharged from the top exhaust duct by the exhaust fan. During this process, the hot sand is also pre mixed while cooling, and the cooled old sand reaches three levels of uniformity: uniform temperature, moderate uniformity, and uniform composition, Create favorable conditions for mixing sand with stable performance.
