In some cases, the prototype is called the first edition. As the name suggests, it is based on the appearance drawings and structure of the product before mass production.
Drawings are generally made first with a small number of samples, which can be used to check the appearance or structural rationality of the product.
So which industries are precision users of Shouban factories or Shouban companies? Using the big data tools of the webmaster’s house, we search for the prototype
With this keyword, it is found that the demand is relatively strong in the automotive, household appliances, electrical appliances, toys, medical equipment, technology and other industries. For these
In the industry, the production of prototypes and rapid molds is commonly used in China: CNC machining, SLA, SLS, SLM, FDM, vacuum complex mold,
Low pressure infusion, sheet metal production, we will compare this from the definition, the use of materials, the use of software, machinable parts, advantages and disadvantages
Several Shouban machining methods.
1. CNC machining
CNC machining is a computer numerical control machine tool, which is formed by cutting a whole plate by controlling the tool path according to the programmed program. It is currently the most used in China.
A wide range of hand-board production methods, the operation method is complex, requires the operator to have rich experience.
Mainly used in the machining of plastic and metal plates, which can be cut on all plates on the market. It is a material reduction technology and can only be processed
The rounded corners of a certain arc can not be processed directly to the inner right angle, which must be achieved by wire cutting/sparking and other processes.
SLA is three-dimensional photocuring molding method, a kind of 3D printing technology, most of the materials used are resins, and ultraviolet rays with specific wavelength and intensity are used
The laser is focused on the surface of the photosensitive resin to solidify it layer by layer, and finally the layers are layered to form a three-dimensional entity.
All 3D printing is an additive technology, from 0 to 1. SLA is the earliest rapid prototyping manufacturing process with high maturity,
Prototype made directly from CAD digital model, with fast machining speed and short production cycle, no cutting tools and molds are needed, and it can be processed
Prototypes and molds with complex structural shapes or difficult to form using traditional means.
SLA equipment is expensive and has high requirements on the factory environment. The strength, rigidity and heat resistance of the mold after molding are limited, which is not conducive to long-term storage.
SLS is selective laser melting, a kind of 3D printing technology, and the current mature process materials are wax powder and plastic powder. Laser beam pair during printing
The tiled powder is selectively sintered, one layer completes the powder box descending, and then another layer of powder laser sintering, all sintering takes out the powder box
By removing excess powder, a sintered part can be obtained.
The hand-board mold made by SLS has high strength and good toughness, and can be used to make bearings, gears, precision parts, and electronic parts, because it does not need support.
The utilization rate of the material is high; but it is polluted during the cnc machining china of the hand board; the speed is relatively slow.
SLM is the selected area laser melting molding technology, which is currently the most common technology in metal 3D printing molding.
Melting preset metal powder to directly obtain parts of any shape and with complete metallurgical bonding, the resulting manufacturing density can reach
99% or more.
In the process of making SLM molds, SLMs are usually more complicated and need to print support materials. After the parts are completed, the support needs to be removed.
And the surface of the workpiece is processed, so the production time will be longer and the cost is higher.
FDM is a fusion forming method. The material of FDM is generally a thermoplastic material, such as wax, ABS, nylon, etc., which is fed in a filament form. Material in
The nozzle is heated and melted. The nozzle moves along the section profile and filling trajectory of the part, and at the same time extrudes the molten material, the material quickly solidifies,
And condense with surrounding materials.
In the process of making hand-board molds by FDM, the price is relatively low, the materials are safe and harmless, there is no mold fee, and you can make a variety of colors.
However, hollow products cannot be printed.
After the FDM process, the hand mold has obvious stripes, and the molding accuracy is relatively low. It is necessary to design and manufacture the support structure and the molding time is longer.
6. Vacuum complex mold
Vacuum re-molding is to use the product prototype (such as: SLA or hand-board machining) to produce a silicone mold under vacuum, and in vacuum
The PU material is used for casting in order to clone the same copy as the product prototype.
Vacuum lamination is currently the most widely used copying technology in the world; the technology can be used to change the material of the product prototype and assemble the prototype
Or carry out small batch production of products to meet the needs of performance testing, market promotion, inspection and approval during product development;
Choose different PU materials, can copy rubber parts, transparent parts, high temperature parts, etc., ordinary PU materials are brittle, tough and resistant
High temperatures are relatively poor.
7. Low pressure perfusion
Low-pressure infusion, also known as low-pressure reaction injection molding, is a new process applied to the production of rapid molded products. It uses two-component polyurethane materials.
After mixing, it is injected into the rapid mold under normal temperature and low pressure environment, through the chemical and physical process of material polymerization, crosslinking, curing, etc.
Cheng formed products.
The low-pressure perfusion generating hand-board mold has the advantages of high efficiency, short production cycle, simple process and low cost, and is suitable for product development
In the process of small batch trial production, and the production of small batches of simpler coverings and large thick-walled and uneven-walled products.
8. Sheet metal production
Sheet metal production is the machining of metal plates such as steel plates, aluminum plates, copper plates, including laser cutting, stamping, bending, etc., sheet metal machining
The remarkable characteristic of the raw material is that the thickness of the same part is the same.