5 major 3D printing technicality definition and basic principle deep analysis
The mechanism of 3D copier is to 3d molding take a model design document as the basic, apply the powdered metal material or plastic and other bondable raw mater...
The mechanism of 3D copier is to 3d molding take a model design document as the basic, apply the powdered metal material or plastic and other bondable raw materials, and structure the technicality of the object according to the method of printing out step by step. Because the 3D printer principle in the complicated three-dimensional production and manufacturing converted into a series of two-dimensional production and manufacturing of the accumulation, so you can form almost arbitrarily complicated parts without the premise of the mold shell and props, greatly improving the efficiency and softness of production and manufacturing.
This kind of intelligent production mobile mine method does not need complicated processing technology, huge numerical control lathe, many human resources, immediately from the computer pattern data information can form all kinds of parts. Moreover, the utilization rate of raw materials is more than 90%, which significantly reduces the cost of raw materials.
Key technology type
Up to now, the more popular types of mtr hk 3D printing technology mainly include SLA/DLP technology, FDM melting lamination forming technology, 3DP technology, SLSps selective laser calcination/SLMps selective laser melting, etc.
(I) SLA/DLP technology
SLA is the abbreviation of "StereolithographyAppearance", that is, three-dimensional uv curing lamp molding method. With a special light wavelength and compressive strength of the laser beam focus on the surface layer of light-curing materials, so that from point to line, from line to surface order condensation, an aspect of the mapping work, followed by lifting the platform in the vertical orientation to move a layer of the relative height of the piece, and then dry solid another aspect, so layer by layer accumulation of a three-dimensional solid line.
SLA is the first productization of rapid forming technology, the choice of liquid photosensitive resin raw materials, processing process fundamentals are shown in Figure 1 below. Its technical course is, first according to the CAD design scheme out of the three-dimensional digital model, the use of discrete variable program process will be model to carry out the cut block solution, design scheme scanner path, resulting in information will be precise control of the laser sweeper and lift fitness movement; laser light according to the CNC machine tool equipment manipulation of the sweeper, according to the design scheme scanner path irradiation liquid photosensitive resin surface, so that the surface of the special Area within a layer of epoxy resin solidification, when a layer of production and processing is completed, it forms a cross-section of the part; then the lift platform is lowered a certain pitch, dry solid layer covered with another layer of liquid epoxy resin, and then carry out a second layer of scanner, the second dry solid layer firmly bonded to the previous dry solid layer, so that layer by layer accumulation of three-dimensional product workpiece prototype. After the prototype is taken out of the epoxy resin, the final dry-fixing is carried out, and then the specified product is obtained by cloth light, plating process, painting or dyeing solution.
SLA technology is mainly used in the production of various kinds of mold shells and solid models, and can also replace the wax mold in molten die precision casting with the original mold according to the addition of other ingredients in the raw material. Therefore, it is the development trend to develop and design the photo-sensitive raw materials with small gathering, fast drying and high compressive strength.
DLP laser forming technology and SLA three-dimensional offset printing technology is more similar, but it is the application of high-definition data light CPU (DLP) projector to dry solid liquid light polymer, step by step uv curing lamp, because the drying of each layer according to the ppt-like block drying, so the rate is faster than the same type of SLA three-dimensional offset printing technology. The technical molding high precision, in the raw material characteristics, key points and surface smoothness level comparable to the injection molding process of durable plastic components.