Most explanations of 3D printing suggest that you can take a part off the machine and use it immediately. In fact, there are a range of post processing services before the part can be considered finished. From the removal of excess material to washing and curing, post processing is a required final step. Here’s a summary of the processes used by 3D prototyping companies and why they matter to your prototyping needs.

What is Post-processing in 3D Printing?

Post-processing is a general term that refers to any task or procedure performed on the product once it’s printed. It may also include certain techniques used for enhancing aesthetics or functionality, but also includes basic processes that are actually the final steps in 3D printing.

Step 1: Remove Support Material

When a part is sent for 3D printing, the operators often use different support materials to make structural changes to the printed part or product. These materials allow for the part to be printed in the optimal orientation while preserving irregular shapes, overhangs, and openings that would collapse without the support. These materials may be soluble or insoluble, but this different only impacts the means by which the support material is removed once the part is taken off the 3D printer.

Step 2: Curing

Many 3D printing technologies require post-process washing and/or curing before the part is truly finished. The purpose of the washing is to remove the remaining support material and an extraneous resin that may be clinging to the part. The curing stage helps to achieve the final appearance as well as ensuring the strength of the material.

Step 3: Additional Post-Processing

In addition to the removal of support materials, the best 3D prototyping companies also offer a range of additional options to improve the appearance and function of the part. Some examples of these processes include:

  • Subtractive Post-Processing: Removes excess material from the printed part or object for the perfect surface finish. This process includes methods like sanding and polishing, tumbling, sandblasting, polishing, CNC machining, and chemical dipping.
  • Additive Post-Processing: Adds material to the printed object to change aesthetics, fill in imperfections, and enhance durability. This process includes methods like priming, brush or spray coating, foiling, metal plating, and powder coating.
  • Property-Changing Post-Processing: Redistributed molecules in the 3D printed object to enhance its strength. This process includes thermal and chemical treatments, annealing or heating, local melting, and vapor smoothing.

Post-Processing Delivers a Smooth Product Finish

While the material selection and orientation of the part for 3D printing can result in a good surface appearance on some faces of the object, post-processing ensures a 3D-printed product meets its design specifications from all angles. For instance, 3D-printed objects may show lines through the print material or small protrusions on the surface. The prototype supplier can address structural imperfections with post-processing to remove fine lines and smoothen out the surface. The part can then be painted, electroplated, or covered with a customized decal to achieve the desired look for the final product.

Improves Durability and Functionality

If the 3D printed part is going to be used for testing or even in a final assembly, the part may need to receive post-processing to improve the product’s durability and resistance. Heat, electroplating, and epoxy coating are effective applications that help make the 3D-printed object stronger. It makes the object less susceptible to corrosion and damage. A knowledgeable 3D printing supplier will be able to guide you in determining what is required to meet your needs.

End-to-End 3D Printing Solutions

Post-processing is integral to any 3D printing project. It’s important to test and evaluate a product’s functionality and aesthetics.
At Global Technology Ventures, we specialize in 3D printing prototype service, and offer a range of post-processing options. As one of the best 3D printing companies in Michigan, we can help you achieve your design needs, regardless of the industry you operate in.