In some cases, the hand board is referred to as the first edition. As the name suggests, it is a functional template for checking the rationality of product appearance or structure by making a small number of samples according to product appearance drawings and structure drawings before mass production. So which industries are users of hand board factories or hand board companies? Using the big data tool of the webmaster's house, we searched the keyword "hand board" and found that the industries with strong demand are automobile, household appliances, electrical appliances, toys, technology and so on. The commonly used methods for making hand boards and rapid tooling for these industries in China are: CNC processing, SLA, SLS, SLM, FDM, vacuum re molding, low-pressure pouring and sheet metal manufacturing. We will compare these hand board processing methods in terms of definition, materials used, software use, Machinable parts, advantages and disadvantages.
1. CNC processing
CNC machining is a computer numerical control machine tool, which cuts a whole plate by controlling the knife path according to the programmed program. It is a widely used hand board manufacturing method in China. The operation method is complex and requires the operator to have rich experience. It is mainly used for processing plastic and metal plates. It can be cut on all plates in the market. It is a material reduction technology. It can only process rounded corners with a certain radian, but can not directly process inner right angles. It should be realized by wire cutting / spark and other processes.
SLA is a three-dimensional light curing molding method, a kind of 3D printing technology. Most of the materials used are resin. Ultraviolet laser with specific wavelength and intensity is focused on the surface of the light resin to cure it layer by layer, and the final layer is superimposed to form a three-dimensional entity. All 3D printing is an additive technology, a process from 0 to 1. SLA is an early rapid prototyping manufacturing process with high maturity. It is directly made into prototype by CAD digital model, with fast processing speed and short product production cycle. It can process prototypes and molds with complex structure and shape or difficult to be formed by traditional means without cutting tools and molds. SLA equipment is expensive and has high requirements for the factory environment. The strength, stiffness and heat resistance after mold forming are limited, which is not conducive to long-term storage.
SLS is a kind of selective laser melting and 3D printing technology. At present, the mature process materials are wax powder and plastic powder. During printing, the laser beam selectively sinters the tiled powder, one layer of powder box is lowered, and then one layer of powder is tiled for laser sintering. All the powders are sintered. Take out the powder box to remove the excess powder, and a sintered part can be obtained. SLS handboard mold has high strength and good toughness, and can be used to make bearings, gears, components and electronic components. Because it does not need support, the utilization rate of materials is high; But its is polluted in the process of handboard processing; The speed is relatively slow.
SLM, namely selective laser melting forming technology, is a common technology in Metal 3D printing and forming. It uses fine focusing spot to quickly melt preset metal powder, directly obtain parts with arbitrary shape and complete metallurgical combination, and the manufacturing density can reach more than 99. In the process of SLM making hand mold, because the parts are usually complex and need to print support materials, the support needs to be removed and the surface of the parts needs to be treated after the parts are completed, so the manufacturing time will be long and the cost will be high.
FDM is melt deposition molding method. The materials of FDM are generally thermoplastic materials, such as wax, ABS, nylon, etc., which are fed in filaments. The material is heated and melted in the nozzle. The nozzle moves along the part profile and filling track, extrudes the molten material at the same time, and the material solidifies rapidly. And condense with the surrounding materials. In the process of making hand mold, FDM has relatively low price, harmless materials and no mold cost. It can make a variety of colors, but it can not print hollow products.
The handboard die processed by FDM has obvious stripes, the forming accuracy is relatively low, the supporting structure needs to be designed and manufactured, and the forming time is long.
6. Vacuum compound mold
Vacuum replica is to make silica gel mold under vacuum by using product prototype (such as SLA or hand plate processing), and pour it with PU material under vacuum, so as to clone the same replica as the product prototype.
Vacuum coating is a common hand board replication technology all over the world; The technology can be applied to change the material of product prototype, assemble prototype or carry out small batch production, so as to meet the needs of performance test, market promotion, inspection and approval in the process of product development; Different PU materials can be used to copy rubber parts, transparent parts, high temperature resistant parts, etc. ordinary PU materials are brittle, poor toughness and high temperature resistance.
7. Low pressure perfusion
Low pressure injection, also known as low pressure reaction injection molding, 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 material polymerization, cross-linking and curing. The low-pressure pouring hand plate mold 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 small batch production, simple structure panels and large thick wall and uneven wall thickness products.
8. Sheet metal fabrication
Sheet metal manufacturing refers to the processing of metal plates such as steel plate, aluminum plate and copper plate, including laser cutting, stamping and bending. The remarkable characteristic of raw materials for sheet metal processing is that the thickness of the same part is the same.
The above is Jinan hand board http://www.jrjmockup.com Thank you for checking the information of our company in your busy schedule. If you want to know more, you are welcome to call for consultation!