Application analysis of 3D printing technology in precision casting

Lost foam casting is a kind of technology of precision casting, which is also called gasified casting, solid casting and cavity free casting. The precision of the process is within 0.2m m, and the surface roughness is between ra5 μ m and RA6 μ m. It is known as "the new casting technology in the 21st century" and "the green project of casting" by the casting industry.

Lost foam casting process, in short, is to use fusible materials to make a fusible model. After the model is vaporized at high temperature, the molten metal is poured into it, and then the shell is removed after cooling to get the casting. With the rapid development of 3D printing technology, combined with the application of computer technology, the 3D design drawing of the product can be directly imported into the equipment, and the casting prototype can be directly obtained to replace the traditional wax mold. From the structural design and technological formulation of the investment casting to the design and manufacture of the die and the wax mold forming, great changes have been brought to the production of the investment casting.

In the traditional way of open die pressing wax mold casting, wax mold needs mold. The production of small batch of complex parts is faced with the problems of high cost, long cycle and difficult to modify repeatedly in design verification. These problems will be changed by using 3D printing rapid precision casting to achieve rapid production of castings.

What is sla3d printing rapid precision casting? SLA (stereo lithography appearance) It is a process with high precision and good molding quality in 3D printing process. The resin mold printed directly by SLA light curing 3D printing technology can replace the traditional casting wax mold for casting production, which can save the wax mold opening link. It is a rapid prototyping technology that can meet the requirements of casting industry for precision and surface quality at the same time, with high success rate and more environmental protection.

Application analysis of Al t4517854420485120 3D printing technology in precision casting

With UV as the light source and liquid photosensitive resin as the raw material, under the control of computer, according to the cross-section data of three-dimensional graphics, layer by layer proofing and cumulative molding are carried out. The light curing prototype used for precision casting must be made into hollow shape. After printing and forming, the uncured resin will be poured out, the hollow pattern will be formed, the resin outlet will be sealed, and then the wax casting system will be installed to make the shell. The evacuated prototype with a wall thickness of 0.6mm can be made into a 0.6mm thin sheet state, which can be completely free of impurities by volatilization and gasification during firing. It is an ideal casting process, suitable for casting parts with high strength, large size and high precision.