Lost foam casting has no flash, burr and draft degree, small size error, short machining time, low cost, and no chemical binder in molding sand. Foam plastic is harmless to the environment at low temperature. It is a green casting process with nearly no margin and accurate molding, and is increasingly widely promoted and applied. The sand processing production line can achieve automatic casting sand dropping, impurity screening, iron bean magnetic separation, transportation, and old sand cooling, transportation, and storage, with a recovery and reuse rate of over 95% for old sand.
The workflow of the lost foam casting sand processing automatic production line is: after pouring, the castings in the sand box are Under the control of the system PLC program, automatic box flipping is carried out, and the separation of castings and sand is achieved through a vibrating sand dropping machine. The vibrating conveyor screen is used for screening large particles and impurities. The old sand is lifted to the magnetic separator for magnetic separation of iron beans, achieving iron sand separation. After separation, the iron is stored in a hopper and then returned to the furnace. The old sand is cooled and cooled by a boiling cooling bed, and then vertically transported to the intermediate sand storage and sand temperature regulation storage by a hoist. The old sand is cooled again by the sand temperature regulator under the sand temperature regulation storage, and then vertically transported to the molding sand storage for molding reuse by a 4-stage hoist, thereby achieving automatic recovery and reuse of old sand. Dust is collected through dust removal pipelines and induced draft fans and collected in bag filters for centralized treatment. During the process, there is minimal sand loss, and the reuse rate of old sand can reach over 95%.
With the development of the national foundry industry and the promotion of intelligent manufacturing, as well as the continuous improvement of automation production technology, the lost foam casting automatic production line will be increasingly widely used. The magnetic separator of the sand processing automatic production line can timely sort out the iron beans in the production process, reduce equipment load, improve cooling efficiency, increase old sand recovery, improve the reuse of old sand, reduce the impact on product quality, reduce losses, lower costs, achieve cost reduction and efficiency improvement, and enhance the market competitiveness of enterprises. Its prospects are promising.