With short manufacturing cycle

low manufacturing costs

sand mold and core integrated manufacturing and the development of any complex shaped castings

precision sand casting rapid technology without mold was used to fabricate sand molds or cores with high dimensional accuracy and good surface quality to realize near-net shape of the complex castings

especially suitable for the complex castings of single or small batch production as well as trial of new products.Precision sand casting rapid technology without mold based on laser sintering

3Dprinting and CNC machining principles was reviewed

focusing on the characteristics of the process

the scope of application

and existing problems as well as development prospects.