China's foundry industry is under pressure to transform and upgrade, and by 2020 it will be reduced to 15, 000. 3D printing will play its unique role in it. 3 d printing can ensure the quality of mould as a whole is superior to the traditional foundry method, greatly improve the yield of castings, surface finish, reducing the casting defects, scrap, saving more cost

      Transformation and upgrading of China foundry industry is facing the pressure, the casting foundry enterprises association predicted that 2020 will be reduced to less than 1.5, 55 million tons castings production, casting the size of the output value of about 700 billion yuan. Castings, which account for 30 per cent of the total, will produce more than 80 per cent of production.

3D printing will play its unique role. 3 d printing technology can quickly design ideas into real, especially good at complex structure, is advantageous for the designer and enterprise team effective communication with customers, help to early design verification, and reduce the cost of mistakes.

      3 d printing equipment USES is increasing material manufacturing technology, namely USES the material is "layered manufacturing, accumulate step by step" method of making real parts, it combines computer graphics, digital information control, laser technology, mechanical and electrical technology and materials technology and so on many high technology advantage, can be used to improve the product manufacturing process, greatly shorten the research and development and production process.

      In many 3 d printing, three-dimensional printing (3 dp technology) has the forming speed, forming material price low, do not need support and forming process, remove excess powder materials is convenient, particularly suited to do inner cavity complicated prototype, the most suitable for combining with casting process, realize the industrialization application.

      Many enterprises can import efficient large-scale 3D printing equipment, and carry out the research of the industrial application of 3D printing technology in casting. 3 dp technology on equipment, mainly used for casting sand mold directly printing, make traditional casting mould manufacturing in the type, shape, core making, such as all four process by a process instead of 3 d printing.

The traditional method of casting is not only time-consuming and costly, but also is difficult to guarantee the complete and compactness of shape.

      While modern 3 d printing technology can ensure mold modelling is completely consistent, smooth appearance, high density, appearance and overall quality is better than the traditional foundry method, greatly improve the yield of the castings, surface finish, reducing the casting defects, defective products, thereby saving the cost more.

      Also with difficulty is higher, the larger complex modelling engine cylinder block casting as an example, it can be seen that the appearance of the finished product and tidy, reduced the sand inclusion, sand holes and other casting problem.