Green sand molding as a traditional casting process, due to the pollution of the environment, waste of resources, quality defects of castings, high production costs and other factors, so it has become the preferred factor for reform and change in the foundry industry!
The laminated sand molding is in the molding, core making hard mold surface covered with a solid resin film of sand, core sand is called laminated sand molding. This modeling process.
1、pollution is small, the work site environment significantly improved. As the clay sand to add a larger proportion of combustion aid coal dust, mainly used to increase the appearance of the quality of live parts and air permeability, coal dust added to the sand can not be reused, resulting in a waste of resources. The residual ash after combustion has a great impact on the quality of our working environment. At the same time, the reducing gas and PM2.5 produced during combustion cause serious pollution to the atmosphere. Although the combustion of the moulding method based on the film sand also has a certain impact on the environment, but after all, it uses less sand, while the use of all the waste sand after recycling. The work site is clean and no dust pollution.
2、the thin layer of sand covering, the amount of less, low production costs, waste is small, the use of sand can be recycled. Due to the thin sand covering layer of this molding method, usually 5-10㎜ sand covering layer is designed according to the wall thickness of live parts, while clay sand molding usually has a minimum sand covering amount of perhaps 30-50㎝, and the amount of sand used is 10-20 times the amount of sand covering. Although the clay sand can also be recycled, but the addition of a high proportion of coal dust, bentonite and other additional raw materials have been depleted, the quality of sand has been greatly reduced, affecting the quality of the appearance of the product. and the film sand molding sand after high-temperature roasting, expansion is greatly reduced in the secondary use of the process steps to reduce the acid washing, while the addition of solid resin, curing agent is also greatly reduced, reducing production costs.
3、Change the appearance quality of the blank, reduce the cutting allowance, high process output rate and stable quality. Due to the clay sand molding sand hardness is low, give way to a large, cast live parts up box, up sand, drop sand,, porosity, shrinkage and other casting defects are serious, not only cause poor product appearance, while the product''''''''s inherent casting defects, seriously affect the service life of the product, high scrap rate. The aggregate in the film sand molding is acid washing or high temperature roasting, reducing the amount of sand expansion after combustion, the strength of the cured sand is high, the amount of gas is small and other advantages, resulting in the production of products whether from the appearance of quality, inherent casting defects, to the accuracy of the product size is far better than the products produced by clay sand molding.
4、Improve the inner quality of the product. Because the coating sand molding pouring cooling speed, greatly improve the graphite form of the casting, as much as to improve the mechanical properties of the product, increase the service life of the product. Film sand molding produced products, especially ductile iron, regardless of spheroidization level, matrix organization, hardness, tensile strength, yield strength, etc. is far better than the clay sand molding produced by the product. It invariably improves the inherent quality of the products. Increase the service life of the product, indirectly to meet customer demand to provide a strong guarantee.
5、film sand molding using automatic production line operations, improve production efficiency, reduce the labor intensity of workers, shorten the labor time. While the traditional clay sand molding is using manual molding or molding machine molding, the labor intensity of workers, low efficiency, is the production line molding efficiency of 1/3 to 1/4.
Qingdao Sanzhuji Equipment Manufacturing Co., Ltd. specializes in the production of sand reclamation equipment,foundry machines,Sand casting equipment,GS high efficiency rotary mixer,no-bake resin sand mixer,Jolt squeeze molding machine/Jolt-squeezing moulding machines,Multi- Piston Moulding Machine/Hydraulic multi-piston moulding machine,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.
