Lost foam casting is also called lost wax casting. The white foam model is wrapped with a special material and placed in a sand box. The casting port is wrapped and sealed with a plastic film to prevent sand particles from entering the interior of the model. For inferior products, the sand boxes used in lost foam casting are relatively large. They are transported by rails. The foam model is covered with silica sand by rain and sand. A three-dimensional tapping table will be equipped under the sand filling port. The foam model reduces voids. The casting area is equipped with a vacuum negative pressure system and a side suction cover for dust removal. The vacuum negative pressure system can ensure the pressure difference caused by the melting of the foam model during the casting process to ensure the soundness of the casting and the stability of the sand mold. The side suction cover is connected The dust collector can quickly remove the smoke and dust from the purification workshop environment. After cooling, the casting and silica sand are separated by the box turning machine. The old sand enters the sand bin through the recycling system, and the casting is passed through the separator to remove the pouring riser and redundant connection points, which requires shot blasting. The castings are surface shot blasted by shot blasting machine.


1. This lost foam casting production line adopts an automated PLC control system. The sand boxes used are all customized standard sand boxes, which are transported by conveyor tracks and conversion trolleys. Therefore, the sand filling time, running direction and casting time of the sand box are all It is standardized and standardized.

2. The foaming machine adds the foam raw materials into the mold plate, and obtains a complete casting foam model by heating the mold plate. The workshop staff hangs the foam model on the moving chain, and the chain drives the foam model into the slurry tank. After completion, it enters the drying tank. In the dry zone, when the paint is completely solidified and air-dried, the foam model will be placed in the sandbox.

3. The amount of sand added is controlled by a pneumatic control valve. The rain shower sand adding is a general sand adding method for lost foam casting. The sinking design is adopted under the sand adding port, and the three-dimensional vibrating table is installed directly below, and the sand is three-dimensional when adding sand. The vibrating table enters the working state, and the three-dimensional vibrating table is driven by a vibrating motor to tap the gaps at multiple angles, so that the silica sand can tightly wrap the foam model.

4. The vacuum negative pressure system is the core equipment of lost foam casting. After the sand box enters the casting area, the sand box is connected to the air hose, and the integrity of the entire sand mold is ensured by vacuuming, and the gas that melts the foam model Quickly extract the cavity to ensure the integrity of the casting.

5. The box turning machine is hydraulically driven. After cooling, the sand box is separated from the sand particles and the castings by the box turning machine. The old sand enters the sand bin through the belt conveyor and bucket elevator for recycling. The riser and the redundant part are obtained as a single sound casting.

6. Most of the shot blasting machines equipped with the lost foam are hook shot blasting machines or hanging chain passing shot blasting machines, and the castings are subjected to surface shot blasting.

Qingdao Sanzhuji Equipment Manufacturing Co., Ltd. specializes in the production of Green Sand Molding Line,Self-hardening sand molding line,foundry machines,Sand molding machine,Sand casting equipment,sand mixer,GS high efficiency rotary mixer,Resin sand mixer,no-bake resin sand mixer,Jolt squeeze molding machine/Jolt-squeezing moulding machines,Multi- Piston Moulding Machine/Hydraulic multi-piston moulding machine,sand casting molding machine,sand reclamation equipment,foundry molding machine,flaskless moulding machine,shot blasting machine,dust collector,according to the amount of old sand recovered Carry out plan customization, and provide sand reclamation equipment installation, commissioning, and training. Welcome guests to visit the factory.