Engraving rapid prototyping:
This technology has high forming accuracy and is not affected by materials and shapes, which can compensate for the processing shortcomings of general mechanical large cutting tools. Application scope: copper electrodes, jewelry patterns, electroforming models, building models, signs, etc
Laser rapid prototyping
Laser rapid prototyping is divided into SLA and SLS based on different raw materials.
SLA is a process that adopts the principle of three-dimensional carving, also known as photosensitive resin selective curing, and is the earliest rapid prototyping technology that emerged. The process is to fill the resin tank with liquid photosensitive resin, which will quickly solidify under the irradiation of ultraviolet laser beams. At the beginning of the molding process, the adjustable worktable is at a height of a cross-sectional layer thickness below the liquid level. The focused laser beam is scanned along the liquid level according to the requirements of the cross-sectional profile under the control of a computer, allowing the resin in the scanned area to solidify, thereby obtaining a resin thin sheet of the cross-sectional profile.
Then, the workbench descends by one layer of thin film height, and the cured resin thin film is covered by a new layer of liquid resin for the second layer of laser scanning curing. The newly cured layer is firmly bonded to the previous layer, and this is repeated until the entire product is formed. Finally, cleaning, removing support, secondary curing, and surface finishing treatment are carried out.
The selective curing rapid prototyping technology of photosensitive resin is suitable for producing small and medium-sized workpieces, and can directly obtain resin or similar engineering plastic products. The SLA rapid prototype has good surface quality, high system resolution, and high molding accuracy.
The processing method of SLS is similar to SLA technology, but it replaces liquid photopolymer with powder raw materials and acts on powder materials at a certain scanning speed and energy. During the forming process, laser parameters, powder characteristics, and sintering atmosphere are important factors that affect the quality of sintering forming. SLS rapid prototyping can produce the toughest hand boards and can use a variety of raw materials, such as the vast majority of engineering plastics, wax, metal, ceramics, etc. The construction speed of parts is high, without the need for post correction, design, and construction support.
CNC rapid prototyping
CNC is widely used in the mechanical processing industry and its technology is relatively mature. Used for hand board processing. The effect and accuracy are also very good, and the first consideration is the hand board processing method.