3D printing: post-processing of MJF and SLS parts

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This article explores the various post-processing operations, applications, pros and cons of SLS and MJF printed parts. SLS and MJF are powder-based 3D modeling technologies used to create parts from thermoplastics and elastomers. As with many other manufacturing methods, post-processing in SLS and MJF completes the manufacturing process.

 

Post-processing operations, applications, advantages and disadvantages of SLS printed parts

Post-processing operations

 

1. Cleaning: During the SLS printing process, unsintered powder may remain on the surface of the part, which needs to be removed with a brush or high-pressure gas.

2. Grinding and polishing: Since the surface of SLS printed parts may be rough, its surface finish can be improved by grinding and polishing.

3. Coating: As needed, specific coatings can be applied to SLS-printed parts to improve their wear resistance, corrosion resistance, or aesthetics.

 

Application

 

SLS technology is widely used in prototyping, mold manufacturing, functional component production and other fields. For example, it can be used to manufacture complex automotive parts, aerospace components, medical devices, and more.

 

Advantages and Disadvantages

 

Advantage

  • Many types of materials: SLS technology can use a variety of powder materials, such as plastics, metals, ceramics, etc.

  • High precision: SLS technology can achieve higher printing precision.

  • Rapid production: From CAD design to component production, SLS technology can achieve rapid production cycles.

 

Shortcoming

  • Rough surface: Since SLS technology makes parts by sintering powder layer by layer, its surface may be rough.

  • Material strength limitations: Parts printed with SLS technology may not be as strong as parts printed with other 3D printing technologies (such as metal 3D printing).

 

Post-processing operations, applications, advantages and disadvantages of MJF printed parts

Post-processing operations

 

1. Cleaning: After MJF printing is completed, there may be unmelted powder remaining on the surface of the part, which needs to be removed by cleaning or blowing.

2. Heat treatment: In order to improve the strength and durability of MJF printed parts, heat treatment may be required.

3. Coating and surface treatment: As needed, MJF printed parts can be coated with specific coatings or surface treated to improve their corrosion resistance, wear resistance or aesthetics.

 

Application

 

MJF technology is suitable for rapid prototyping, low-volume production, and direct manufacturing of final products. It is widely used in automotive, aerospace, medical, consumer electronics and other fields.

 

Advantages and Disadvantages

 

Advantage

  • High speed: MJF technology can achieve faster printing speed than SLS

  • High precision: MJF technology can also achieve higher printing precision.

  • Open innovation: MJF technology supports a variety of materials and software innovations, helping to promote new applications and industry development.

 

Shortcoming

  • Color limitations: Due to the influence of chemical reagents during the MJF manufacturing process, the color of printed parts is generally gray or black.

  • High cost: The cost of MJF equipment is relatively high, so the printing cost may also be relatively high.

 

The above is a brief introduction to the post-processing operations, applications, advantages and disadvantages of SLS and MJF printed parts. Please note that the specific implementation of these techniques and methods may vary depending on equipment and materials.


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