Several common methods of handboard CNC processing in China

In some cases, handboards are called first editions. As the name suggests, before large-scale production, a small number of samples are generally made based on product appearance drawings and structural drawings, so as to check the product appearance or structural rationality functional samples.

So which industries are precise users of mobile board factories or mobile board companies? Using the big data tool of Webmaster Home, we searched the keyword 'Shipboard' and found that the industries with strong demand were automobiles, home appliances, electrical appliances, toys, medical devices, technology and other industries. The commonly used methods in China are: CNC processing, SLA, SLS, SLM, FDM, vacuum duplexing, low-pressure infusion, sheet metal production. We will define, use materials, software, and processable Comparison of these handboard processing methods in terms of parts, advantages and disadvantages.

1. CNC processing

CNC machining is a computer CNC machine tool. It is made by cutting a whole piece of board through the control tool path according to the programmed program. It is currently the most widely used handboard production method in China. The operation method is complex and requires rich experience from the operator. Mainly used for the processing of plastic and metal plates, it can be cut on all plates on the market. It is a material reduction technology. It can only process rounded corners with a certain arc, but cannot directly process the inner right angle. It must pass through the line. Cutting/sparking and other processes are implemented.

2.SLA

SLA is a three-dimensional photocuring molding method, a 3D printing technology. The materials used are mostly resins. Ultraviolet lasers of specific wavelengths and intensity are focused on the surface of the photosensitive resin to cure them layer by layer, and finally stack them layer by layer to form a three-dimensional solid. .

All 3D printing is an additive technology, from 0 to 1. SLA is the earliest rapid prototype manufacturing process that appeared, with high maturity.

Prototypes are directly made from CAD digital models, with fast processing speed and short product production cycle. No cutting tools and molds are required. Prototypes and molds with complex structural shapes or difficult to form using traditional means.

SLA equipment is expensive and requires relatively high requirements for the factory environment. The strength, stiffness and heat resistance after molding are limited, which is not conducive to long-term storage.

3.SLS

SLS is selective laser melting, a 3D printing technology. The current mature process materials are wax powder and plastic powder. Laser beam pair when printing

The flat powder is selectively sintered, and the powder box is lowered after one layer is laid, and then the powder layer is laid and laser sintered. All sintered is taken out to remove the excess powder, and a sintered part can be obtained.

The hand plate mold made by SLS is high in strength and has good toughness. It can be used to make bearings, gears, precision components and electronic components. Because it does not require support, the material utilization rate is high; but it is contaminated during the hand plate processing; the speed is relatively slow. .

4.SLM

SLM, the selected laser melting molding technology, is the most common technology in metal 3D printing molding. It uses fine focusing spots to quickly melt preset metal powder, directly obtains any shape and parts with complete metallurgical bonding, and the resulting production density can reach More than 99%.

During the process of SLM making handboard molds, since the parts are usually complex, they need to print support materials. After the parts are finished, the support needs to be removed and the surface of the parts are processed, so the production time will be relatively long and the cost will be higher.

5.FDM

FDM is the melting molding method. The material of FDM is generally a thermoplastic material, such as wax, ABS, nylon, etc., and is fed in a filament. The material is heated and melted in the nozzle. The nozzle moves along the part section profile and filling trajectory, while extruding the molten material, the material quickly solidifies and condenses with the surrounding material.

During the process of FDM making handboard molds, the price is relatively low, the material is safe and harmless, and there is no mold fee. It can be made in a variety of colors, but it cannot print hollow products. The handboard molds processed by FDM have obvious stripes and relatively low molding accuracy. They need to design and make support structures, and the molding time is longer.

6. Vacuum remodeling

Vacuum duplexing is to use product prototypes (such as SLA or hand plate processing) to make silicone molds in a vacuum state and in a vacuum state.

The PU material is used to pour, so that the same copy as the product prototype is cloned.

Vacuum coating is the most common handboard replication technology used in the world at present; the technology can be applied to changing the material of the product prototype, assembling prototypes or conducting small-scale product production, etc., to meet the performance testing, marketing promotion and delivery during product development. Inspection, approval and other requirements; different PU materials can be used to copy rubber parts, transparent parts, high-temperature resistant parts, etc., and ordinary PU materials are brittle, tough and high-temperature resistant.

7. Low pressure perfusion

Low-pressure infusion, also known as low-pressure reaction injection molding, is a new process used in the production of rapid molding products. It mixes two-component polyurethane materials and injects them into the rapid mold under normal temperature and low pressure environments, and passes through the polymerization and crossing of materials. Chemical and physical processing, curing, etc.

Process to form a product.

Low-pressure infusion-generating handboard molds have the advantages of high efficiency, short production cycle, simple process and low cost. They are suitable for small batch trial production during product development, as well as small batch production, simple structure and large thick walls. Production of uniform wall thickness products.

8. Sheet metal production

Sheet metal production means processing of metal sheets such as steel plates, aluminum plates, copper plates, etc., including laser cutting, stamping, bending, etc. The significant characteristic of the raw materials for sheet metal processing is that the thickness of the same part is the same.