3D printing is a layered construction of a solid three-dimensional product. 3D printing belongs to the group of auxiliary manufacturing techniques, that is. Materials are added. The process of subtracting the production is different, p. B. milling, in which the material is removed to reach the finished article. 3D printing is usually called rapid prototyping (see Wikipedia: Rapid prototyping, 3D printing), because the final product is compared to conventional manufacturing technology, such as B. Injection molding occurs relatively quickly, without the need to build a tool first. 3D printing requires electronic data to describe the model to be produced in three dimensions (the X-axis, the I-axis and the Z-axis). The starting point is always a design drawing made in a CAD program or a surface model for 3D scanning. We offer interesting facts and general information about 3D printing, read below or on remby.de
3D printing process
The following shows the various current additive manufacturing processes. You can read more about the material used in our article on 3D printing equipment.
In the laser sintering process, the starting powder is applied in a thin layer on a 3D printer. The laser is then mixed in the local areas into the corresponding 3D model layer. Gradually, layer by layer is applied and stored. Today, small and medium models can be manufactured by this process and metals, plastics (white and monochrome) as well as mixtures of glass and materials can be processed.
Stereolithography is the oldest of the methods presented. In stereolithography, a thin epoxy resin is applied in thin layers, mainly cured with UV rays. The resin cures in areas exposed to laser, so that the finished model is created gradually. Very large models can be created using this method. Light and colored epoxy resins can be used. Depending on the objects, it is necessary to provide support structures to be removed after the printing process.
In the melting process, the pre-fabricated feed chains (usually rolled on reels) are heated to the melting point and applied to the production platform. The 3D model is applied layer by layer, one over the other and integrated into the entire product. Simple models for home printers are already available for this process. This process can be used to produce small and medium size models of the following materials: polymer (PLA – lactic acid biopolymer) and acrylonitrile butadiene styrene (ABS synthetic polymer), in addition to other materials or special materials. Many colors are available, making it particularly attractive for home use. Depending on the purpose, this method also requires support structures that are removed after the printing process.
The powder printing process is similar to the laser sintering process. On the other hand, the powder does not melt, but solidifies at the points of the bonding material. This creates a solid model in which (depending on the process and materials) the outer layers can be added with additional colors. For example, when printing plaster, you can print specially appreciated color sculptures on human and animal copies. This process can produce models from small to large, in addition to processing plaster and ceramics. Sand, metal or combustion materials are used in special metal casting applications.