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Rapid Prototype 3D Printing Machining

    Selective laser melting (SLM) and direct metal laser sintering (DMLS) are two metal additive manufacturing processes that belong to the powder bed melting 3D printing series.

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    The two technologies have many similarities: both use laser scanning and selectively fuse (or melt) metal powder particles, glue them together and build them layer by layer. Similarly, the materials used in both processes are granular metals.
    The difference between SLM and DMLS is due to the basis (and patents) of the particle bonding process: SLM uses metal powder with a single melting temperature and completely melts the particles, while in DMLS, the powder is composed of materials with variable melting points at high temperatures Fusion at the molecular level.
    Bering 3D provides 3D printing services for various metal materials such as stainless steel, die steel, titanium alloy, aluminum alloy, and bronze.

    Light curing technology (SLA) is a rapid prototyping technology that first appeared and commercialized in the world, and it is also one of the most in-depth and widely used rapid prototyping technologies.

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    It mainly uses photosensitive resin as a raw material, and utilizes the characteristic that liquid photosensitive resin will cure quickly under ultraviolet laser beam irradiation. The photosensitive resin is generally liquid, and it immediately initiates a polymerization reaction and completes curing when irradiated with a certain wavelength of ultraviolet light (250 nm to 400 nm). SLA focuses on the surface of the light-curing material by focusing ultraviolet light of a specific wavelength and intensity to solidify it sequentially from point to line and from line to surface, thereby completing the drawing of a layered cross-section.

    Selective laser sintering (SLS) is a powerful 3D printing technology that belongs to the powder bed fusion process series, which can produce high-precision and durable parts, which can be directly used for end-use, small batch production or prototype prototypes.

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    In the printing process of the SLS equipment, a high-power laser is used to fuse small particles of plastic powder into the required three-dimensional shape. The laser selectively fuse powder materials by scanning the three-dimensional data section on the surface of the powder bed. After scanning each section, the powder bed is reduced by a layer of thickness, a new layer of material is added to it, and the selective laser sintering process is repeated until the part is completed.
    SLS 3D printing can be used not only for the prototype design of functional polymer components, but also for small production runs because it has high design freedom, high precision, and produces parts with good and consistent mechanical properties.

3D printing Process

  • 1Process For SLM

    First, fill the printing chamber with an inert gas (such as argon) to minimize the oxidation of metal powder.

    Then heat it to the best printing temperature. Spread a thin layer of metal powder on the platform, scan the cross section of the component with a laser, and melt (or fuse) the metal particles together to complete the data printing of this layer.

    After the printing of the previous layer is completed, the printing platform moves down one layer of thickness, and the squeegee moves across the platform to deposit the next layer of powder into the inert printing chamber. Then reapply another layer of metal powder. Repeat this process layer by layer until printing is complete.

    After the printing process is completed, the parts will be completely encapsulated in metal powder. The support in metal 3D printing is constructed using the same material as the part, and it is always necessary to alleviate warpage and deformation that may occur due to high processing temperatures.

    When the material box is cooled to room temperature, the excess powder will be manually removed. The parts are usually heat-treated while still attached to the printing platform to eliminate residual stress. Then, the assembly is removed from the printing board by wire cutting, ready for use or further post-processing.

  • 2Process For SLA

    Control the printing screen to sink to a certain height below the resin surface, so that the screen is covered with a layer of material.

    The computer controls the laser and galvanometer, and uses UV laser to scan the cross-section of the part currently to be printed, and solidify the part of the material that needs to be printed from liquid to solid.

    After the scanning is completed, the screen sinks to a certain height, and the squeegee spreads a layer of material (the main function is to smooth and fill the large flat material), and repeat the above step 2 until the printing is completed.

    After the printing is completed, take out the printed product, which needs to be cleaned with absolute ethanol and second-cured by ultraviolet light.

  • 2Process For SLS

    First heat the powder bin and construction area to close to the melting temperature of the material, and then spread a layer of powder material.

    Second, use a laser to scan the cross section of the layer to raise the temperature of the powder to the melting point, and selectively sinter the area to be printed to form a bond.

    After the sintering is completed, the construction platform moves down, and the scraper is covered with a layer of powder material, and the content of step 2 is repeated until the entire model is formed.

    After printing is completed, the forming chamber cools down (generally the temperature is lower than 40 degrees), you can start to take out the parts and do subsequent processing.

Compare The 3D Printing Data

Not sure which 3D printing technology is right for you? Compare the capabilities of each process below to see what fits your part requirements.

  • Us
  • Metric
Materials Max Part Size Min Feature Size Tolerances
Metal 3D Printing Aluminum 9.6 in. x 9.6 in. x 13.0 in 0.006 in. ±0.003 in
Stainless Steel (17-4, 316L) Inconel: 31.5 in. x 15.7 in. x 19.7 in.
Cobalt Chrome
Stereolithography ABS 5 in. x 5 in. x 2.5 in. 0.0025 in. ±0.002 in.
Selective Laser Sintering Nylons 19 in. x 19 in. x 17 in. 0.030 in. ±0.010 in.
Materials Max Part Size Min Feature Size Tolerances
Metal 3D Printing Aluminum 245mm x 245mm x 330mm 0.1524mm ±0.076mm
Stainless Steel (17-4, 316L) Inconel: 400mm x 800mm x 500mm
Cobalt Chrome
Stereolithography ABS 127mm x 127mm x 63mm 0.0634mm ±0.0508mm
Selective Laser Sintering Nylons 482mm x 482mm x 431mm 0.762mm ± 0.254mm

Custom Your Finishing 3D-Printed Parts!

Looking to boost the strength, clarity, or appearance of your 3D-printed parts? Printing Plastic/Metal Parts at rongna-net.

Rapid Prototype Plastic/Metal 3D Printing
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What's the Advantages Of SLM/DMLS/SLA/SLS

  • SLA
  • SLS


(1) The metal 3D printing process can be used to manufacture custom parts with complex shapes that cannot be produced by traditional manufacturing methods.

(2) Topological optimization of metal 3D printed parts can be performed to maximize their performance while minimizing their weight and the total number of parts in the assembly.

(3) Metal 3D printed parts have excellent physical properties, and the range of available materials includes other materials that are difficult to process, such as metal super alloys.


(1) SLA can produce parts with high dimensional accuracy and complex details.

(2) SLA parts have a very smooth surface finish, making them ideal for visual prototypes.

(3) Special SLA materials can be used, such as transparent, flexible and castable resin.


(1) SLS parts have good isotropic mechanical properties, making them an ideal choice for functional parts and prototypes.

(2) SLS does not require any support and can easily produce designs with complex geometric shapes.

(3) The manufacturing capacity of SLS is very suitable for small and medium batch production.

Rapid Prototyping Plastic and Metal 3D Printing

  • Plastic 3D Printing Services
  • Metal 3D Printing Services
  • Rapid Prototyping


We are Plastic 3D printing services company which offer almost all kinds of plastic 3d printing services.

Rapid prototyping 3D printing services such as high quality fdm and GDM printing, low-volume production, desktop manufacturing, desktop direct printing, cookie sheet production, die cutting, lamination, desktop publishing, plating, Zebra printing, UV coating, hard coatings, gloss coating, gloss engraving, membrane carving, fiberglass coating, acrylic ink, nylon coating, melamine coating, CMYK printing, foil stamping.

We can produce plastic objects out of metal or plastic and without disturbing the original design. Customizable


RongNa metal 3d printing can create parts with extreme accuracy and extraordinary mechanical properties.

RongNa Metal 3D printing service allows individuals and manufacturers to build anything they want, including stainless steel, aluminum, and even cobalt chrome automobile parts. Since the parts can be made to any specification, they can also be produced as a one-of-a-kind part..

With metal 3d printing technology, companies can have the ability to create high quality, durable parts at a low cost, which makes them ideal for manufacturers.


Reduced Cost: The main advantage of rapid prototyping 3D printing lies in its ability to provide additive manufacturing process designers with inexpensive but accurate parts.

Faster Application: This process is commonly used in the manufacturing industry, particularly in cases where several different parts or sub-systems need to be produced at the same time. Rapid prototyping 3D printing services ensure consistency in the design of individual parts. It also enables speedy development of these parts in terms of performance, reliability, etc., due to the interchangeable nature of the parts. They are widely used in the automotive and aerospace industries.

Create prototypes easier:For rapid prototyping 3D printing to be effective, it must be able to allow the manufacturers to create prototypes easily, within short deadlines. These can then be used to make changes and modifications to the existing designs or to develop new ones.

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