Application of 3D printing technology in sand casting

The traditional sand mold casting mode is to use mold modeling and sand mold combined pouring to form sand mold castings. For sand castings with multiple varieties and small batches, the manufacturing cost of molds is generally high. For sand castings with small batches, the cost of single sand castings will be very high, which will affect the sales profit of sand castings. In addition, a remarkable feature of multi variety and small batch sand castings is the project order procurement mode. Sand castings of the same model are almost purchased only for one or several of the same projects. It is difficult to have the same demand for sand castings after the project is completed. This typical procurement mode makes the new molds lose value after production, Traditional wooden molds can not be recycled, and there will be a backlog in the enterprise. With the passage of time, more and more molds take up more and more space, resulting in a waste of intangible assets for the enterprise.

With the development of society, customization and personalization tend to be normal, and the demand for mass and unified production will be less and less. Instead, the demand for customization will be replaced. Single customization or even single customization mode will become a common problem faced by all enterprises. Such procurement demand urges the traditional sand mold casting enterprises to change. How to face the existing difficulties, how to ensure the rapid prototyping of sand mold castings, and how to transform and upgrade are the same problems faced by various sand mold foundries. The emergence of 3D printing technology just caters to the needs of the current sand casting industry.

By improving the original process scheme, the quality problems of sand castings caused by blade sand core deformation or fracture were solved, and qualified sand castings were produced. At the same time, through the improvement of the original process scheme, the problems of slag inclusion and gas residue l of sand castings are reduced to a great extent, and the production cost is saved.