In fact, "hand board" is not a new word. It has existed for a long time. Now I'll sum up the methods of making Jinan hand board and their respective characteristics.
Laser rapid prototyping.
FDM, which is made of ABS strips by laser sintering, is characterized by the same physical properties and chemical composition as ABS. It has good assembly performance, clear internal structure, but rough appearance, which is suitable for structural verification.
SLA is made of epoxy resin sintered by laser. The epoxy resin is liquid at room temperature and is packed in the box of SLA machine. When the laser scans layer by layer according to the structure of the graph, the epoxy resin will change from liquid to solid where the laser touches. After that, put away the excess liquid epoxy resin in the box, and a model exactly like the graph will be left. SLA is suitable for making small pieces, but CNC is difficult to process.
SLS, developed from SLA, not only has the function of SLA, but also can sinter metal powder (such as aluminum powder, copper powder, stainless steel powder, etc.), and the cost of making hand board is higher than that of SLA.
CNC prototype is an advanced technology that integrates computer aided design (CAD), computer aided manufacturing (CAM), computer digital control (CNC) and other advanced technologies. The three-dimensional data model formed on the computer is formed by cutting and mining the whole material. It is characterized by high processing speed, low cost and high processing accuracy.
Moreover, the selection of materials is wide, which can ensure the consistency between the materials of the prototype and the materials of mass-produced parts. The hand board has a strong sense of reality, and the surface quality can reach a high level. After subsequent processing such as grinding, polishing, sandblasting, painting, silk screen printing, UV electroplating, the production effect can be completely comparable to or even higher than the products produced by the mold. Because CNC processing needs to be done one by one, it is suitable for 1-5 batches.
Vacuum mold (silicone mold).
The process is to make a silica gel mold with the motherboard, then pour liquid epoxy tree fingers (such as PU), and then heat it to cure, and then take out a hand board (model) that is exactly the same as the motherboard from the silica gel mold. But the silica gel mold is a soft mold, and the dimensional accuracy of its hand plate (model) is not high. And the material used is epoxy resin, not real plastic. It is suitable for 5-50 batches.
Low pressure perfusion.
Also known as low-pressure reaction injection molding (RIM), it is a new process applied to the production of rapid molding products. After mixing the two-component polyurethane materials, it is injected into the rapid mold at room temperature and low pressure, and the products are formed through chemical and physical processes such as polymerization, crosslinking and curing of the materials. It has the advantages of high efficiency, short production cycle, simple process and low cost. It is suitable for small batch trial production in the process of product development, as well as the production of panel parts with simple structure and large thick wall and uneven wall thickness products in small batch production. Low pressure pouring is suitable for 5-50 batches.
Rapid tooling (simple tooling).
It is to simplify the structure of the formal mold, make the mold completely according to the formal mold, then put it on the plastic machine for injection molding, and then process it with CNC to meet the requirements of the drawing. Simple mold is an organic combination of mold technology and machining technology. Its advantage is that materials can be selected according to the design requirements, such as abs-v0, pc+abs, pa66+30%gf, pom+30%gf, etc., and injection molding processing can also be carried out according to the design requirements. Its batch is suitable for 50-5000, which is very suitable for small batch trial production of products. It is an ideal way for small batch production.
According to the different process equipment, the manufacture of hand board can be divided into laser rapid prototyping (fdmslasls), CNC processing, vacuum mold (silica gel mold), rapid mold (simple mold) and low-pressure pouring. I hope the above content can help you. Please come to the website for more content http://www.hausofhotrod.com Consult and understand.