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180. SLA / LOM basic principles and characteristics?

CNC technology combined with rapid prototyping, CAD technology, laser technology, materials science and technology, automatic control technology and other advanced achievements of the discipline, the use of light, heat and other energy forms, materials, sintering, curing, bonding, or melting, the final forming a part of the three-dimensional physical model.

LOM principle of selective cutting thin materials, also known as three-dimensional model is based on the contour of each section, under the control of the computer, with carbon dioxide laser beam on the thin material (such as coating the underside of the paper) to be cut, gradually layers section, and bonded together to form three-dimensional products. Features: This method is suitable for forming large and medium sized parts, warpage is small, forming a short time, but not high dimensional accuracy, material waste, large, and clear the waste problems. SLA use the carbon dioxide laser sintered powder materials (such as wax, PS powder, ABS powder, nylon powder, ceramic and metal powder coated). When forming the first layer of powder material in the upper table, the laser beam under the control of the computer, in accordance with section profile of information, where parts of the solid part of the sintered powder. Layer is complete, drop a slice table, and then a layer of powder spreading post-sintering. This cycle, forming three-dimensional product. Features: This method is suitable for molding small parts can be manufactured directly wax or plastic, ceramic and metal products. Warpage of parts of the SLS process than the smaller, but still prone to deformation of the local design support structure. This process should be filled on the solid part of the scan sintering, thus forming a long time. And can be coated ceramic powder and sintered metal powder coated, have shaped parts, will be placed in furnace parts, the burned one of the binder and filler into the pores. It is the biggest advantage for materials with a wide, almost powder used can be used, so the widest range of applications.