A Guide to Additive Manufacturing Processes

A Guide to Additive Manufacturing Processes

Manufacturing Technology Insights | Tuesday, July 04, 2023

The method of using 3D printing in industrial production, known as additive manufacturing, enables materials to be made without joints and with little post-processing. This procedure allows for the use of a variety of materials, which makes it simple to produce new products with little waste and cheaper material prices.

Fremont, CA: The method of using 3D printing in industrial production, known as additive manufacturing, enables materials to be made without joints and with little post-processing. This procedure allows for the use of a variety of materials, which makes it simple to produce new products with little waste and cheaper material prices.

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The materials, layers, and machine technology required for each additive manufacturing production approach differ. EWI is an expert in each of the seven, and it can assist your team in choosing, developing, and putting your application's best approach into practice.

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Particle Bed Fusion

In this method of additive manufacturing, material powders are melted and fused together using an electron or laser beam to create finished items. The distinctions between the two varieties of powder bed fusion are as follows:

In laser powder bed fusion, material in the powder form is heated to create 3D objects. A new layer of powder is applied to continue the process once the previous layer has been scraped down. In the end, laser powder bed fusion is self-supporting.

Powder bed fusion with an electron beam can be used to melt particles together in specified locations. The ability to quickly modify the beam speeds up the entire process by enabling numerous melts.

Energy Deposited Directly

With the help of an energy source and powder or metal wire, directed energy deposition (DED) can add material, fuse it to an existing part, or form a new part. Typically, the method is applied in large-scale additive manufacturing.

Container Jetting

By using an ink-jet print head to print a binder onto the powder, metal binder jetting additive manufacturing "binds" the metal particles together into a green state.  The pieces must subsequently undergo a debinding and sintering process (in an oven) in order to become fully dense and hard. This is done after the items have been taken from the powder bed. During the sintering process, parts usually shrink by 20 to 25 percent.

Material extrusion

A filament or thermoplastic material is used in material extrusion to manufacture pieces. In this method, the thermoplastic filament is heated before being continually deposited through a nozzle to produce the finished good or component. There are new materials on the market that are extruded as plastic "rods" but have metal filler inside.  To create metal components, the portions then undergo a process similar to binder jetting called debinding and sintering.

Jetting of Materials

There are new materials on the market that are extruded as plastic "rods" but have metal filler inside.  To create metal components, the portions then undergo a process similar to binder jetting called debinding and sintering.

Vat Photopolymerization

Vat photopolymerization employs liquid resin, in contrast to the other forms of additive manufacturing. A UV light hardens the photopolymer resin after it has been applied layer by layer, producing the finished part or object.

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