3D Printing Surface Finishing: All You Need to Know

Apr 7
02:00

2022

Kiran Hurkadli

Kiran Hurkadli

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3d printing technology is revolutionizing companies across multiple industries. This cutting-edge advancement lets manufacturers produce parts faster with higher flexibility. Today, this technology is widely used among manufacturers for rapid prototyping applications.

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3d printing technology is revolutionizing companies across multiple industries. This cutting-edge advancement lets manufacturers produce parts faster with higher flexibility. Today,3D Printing Surface Finishing: All You Need to Know Articles this technology is widely used among manufacturers for rapid prototyping applications. In addition, companies have gradually started using it for end-product manufacturing. 

Once the 3d parts come out of the printer, they often need to undergo surface finishing before it's ready to deliver. It's an essential process as it offers more strength, durability, and aesthetic characteristics to the components. In addition, as these parts might be used in the real world under harsh conditions, surface finishing improves strength and usability. 

Whether you print a component in-house or opt for online 3d printing services, you also need to pick a specific surface finish. If you're new to additive manufacturing and wondering what types of finishing are available, we've got you covered. 

Plating

Plating is a widely employed surface finishing option that involves covering metal or plastic parts with a metal coat. It's done through either chemical solution or with electric current. A wide range of filament is available for plating, including copper, nickel, silver, and gold. The metal you'll use to coat will depend on what feature you want to add or improve. In addition, a metal coating helps you increase the part's durability and strength by offering an outer protective layer.

Sanding

Sanding surface finishing involves using a rough material like sandpaper to make the object's surface smoother. In addition, this is a valuable process to remove minor manufacturing imperfections from the surface. For example, it often happens that a newly-printed 3d part has visible lines between the layers. For making the component look aesthetically appealing, engineers use sanding to smooth out the lines. If you plan to coat your 3d object with paint, then sanding comes in handy to make the surface even. It's a coming 3d printing solution that you'll quickly find around you. 

Bead Blasting

When normal finishing can't reach the intricate geometric design edges, then bead blasting comes in handy. In this method, engineers use a spray gun to shoot reground thermoplastics at the surface evenly. This post-processing removes grainy textures and makes the surface smoother with a matt finish. Bead blasting is a quick finishing method to use before applying any paint to the object. And the best part is the spray easily coat the hard-to-reach corners of a component. 

Polishing

If you need the 3d-printed part to have a glossy and high-quality shiny finish, then polishing is a handy method. This finishing method is ideal for FDM 3d printing technology. It's because FDM's filament extrusion technique results in visible layers on the object. Thus, polishing is a perfect finishing method to make components customer ready. There are different polishing methods available for a variety of materials. For example, petroleum-based materials like ABS are easy to polish by vaporizing a solvent. 

Shot Peening

It's similar to needing blasting, but this process focuses more on improving the object's durability and strength. In this process, the machine uses pressurized air to shoot tiny plastic or metal needs at the component's surface at higher speeds. These tiny particles create small gouges on the surface of the object. In addition, the compression stress makes the surface robust and makes it resistant to several external factors like erosion and fatigue.  

Heat Treatments

For making a part prone to external stress, heat treatments are a valuable surface finishing option. For example, 3d printed objects undergo a variety of heat treatments to reduce the tensile pressure. Thus, it is an ideal process for preventing structural failure. Heat treatment finishing is also suitable for improving the overall density of the object. 

Vibratory Systems

Vibratory systems are ideal for processing and polishing multiple components at once to save time. In this method, the engineer places the object in a unit containing ground-up material softer than the 3d printed objects. Then, the machine vibrates until the softer material polishes the 3d printed components. It's a suitable process for processing metal-based objects. However, you need to know that this method may damage an object's edges and corners due to higher vibrations. Several companies offer this surface finishing and processional 3d printing in Sydney and other places. 

Tumbling

Tumbling is similar to the vibratory system, but it rotates the drum's objects and the polishing material. As the rotation is gentle, there is a lower risk of object breaking while post-processing. Thus, it's suitable for delicate parts' surface finishing. The tumbling machine is also known as the centrifugal barrel system. Ceramics, plastics and synthetics are commonly used finishing materials used in tumbling.  

Painting

Painting is one of the popular finishing methods that improve the overall aesthetics of the components. However, this finishing option is focused more on improving the visual characteristic of the object rather than improving the functional strength. In this process, engineers first apply a primer and fill pores before applying any paint on the body. Once the colour is done, a precise cost is applied to the object to protect the paint. 

Vapour Smoothing

Vapour smoothing is an excellent method to even out a surface, and it offers a shiny finish to the object. This method uses a solvent to melt the object's surface. Once you place the thing in the vapour chamber for exposing it to the solvent, it's kept in a cooling room to stop liquefaction. The cooling ensures the object's shape is retained while the surface melts. 

Wrapping up!

Pick the suitable finishing method for your 3d printed object to achieve the desired aesthetics. Then, you only need to search for 3d printing stores near me and get started with creating high-quality components.