Subtractive molding refers to the use of separation technology to remove excess material from the substrate in an orderly manner. For example, traditional turning, milling, grinding, drilling, planing, electric spark and laser cutting are all subtractive molding.

Traditional molding processes such as laser cutting are prone to waste of materials

 

Additive molding is also called accumulation molding, which mainly uses mechanical, physical, chemical and other methods to add materials in an orderly manner.

Production molding refers to the method of molding using the activity of materials. The individual development of organisms in nature belongs to growth molding. With the development of active materials, bionics, biochemistry and life sciences, growth molding technology has been developed by leaps and bounds.

3D printing technology and materials:

In a narrow sense, 3D printing technology mainly refers to additive manufacturing technology. From the perspective of molding process, 3D printing technology breaks through the limitations of traditional molding methods. Through the combination of rapid automatic molding system and computer data model, no additional process mold manufacturing is required. With mechanical processing, various prototypes with complex shapes can be manufactured, which greatly shortens the design and production cycle of products and greatly reduces production costs.

With its unique manufacturing technology, 3D printing allows us to produce unprecedented types of items, and reduces costs, shortens working hours and removes complex processes for enterprises. The real advantage of 3D printing technology lies in its printing materials, which can well imitate plastics and plastics. The mechanical or thermal properties of metal materials, but this is also a major technical reason that restricts the development of 3D printing. Here is a brief introduction to the current development status of 3D printing materials and existing problems.

Because 3D printing manufacturing technology has completely changed the methods and principles of the traditional manufacturing industry, and is a subversion of the traditional manufacturing model, 3D printing materials have become the main bottleneck restricting the development of 3D printing, and it is also the key point of 3D printing breakthrough innovation. The difficulty lies in that only by developing more new materials can the application fields of 3D printing technology be expanded. At present, 3D printing materials mainly include polymer materials, metal materials, ceramic materials and composite materials.

3D printing materials are an important material basis for the development of 3D printing technology. To a certain extent, the development of materials determines whether 3D printing can be more widely used. At present, 3D printing materials mainly include engineering plastics, photosensitive resins, rubber materials, metal materials and ceramic materials. In addition, food materials such as colored plaster materials, artificial bone meal, cellular biological materials, and sugar are also available in the field of 3D printing  Application.