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What Is The Use of a Powder Coating Gun?

View: 30 Date: 2023-08-09 11:45:48

A powder coating gun is an essential piece of equipment when starting a powder coating business. These guns are the key to high-quality finishes on different surfaces due to their great performance and power; they are effective tools for improving operational productivity and quality. Simply put, a powder coating gun is used to apply powder coatings. The powder coating is propelled by compressed air as it moves from the hopper to the gun.

The air fluidizes the powder so it can easily flow, and then the spray gun produces charged, low-amperage electrostatic forces, which in turn charge the powder particles. There are different types of powder-coating guns. Some guns generate a charge without using an electrode. Rather, use a conductor in the gun that produces a charge by friction.


The two main types are automatic powder-coating guns and manual powder-coating guns. Powder coating guns are used to shape and direct the powder flow, allowing precise control over the size, pattern, shape, and density during the powder coating process. Another use of the powder coating gun is to impart an electrostatic charge on the fluidized powder, effectively controlling the application onto the surfaces. Read on!


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Powder Coating Gun: What Is It?

This gun is one of the pieces of equipment used in the powder coating method of surface finishing. The powder coating has a container known as a  hopper, which holds the paint before it is sprayed, and a bottom membrane that allows air pumping to keep the powder fluidized. The powder is then drawn up to the nozzle by the compressed air. The purpose of the gun is to electrically charge the paint, causing it to stick to the parts. The thermoset and thermoplastic powder coats each require different guns because of their different properties. There are several options for ensuring paint adherence while using thermosetting powder-coating guns. While the powder coating guns are user-friendly and safe, it is still necessary to exercise caution during use.


Uses of Powder Coating Guns

Spray Formation

Good quality finishes should be uniform. The powder spray gun is essential for producing a consistent and even coating. A part of the gun called the nozzle is responsible for refining the powder particles and creating a powder suitable for spraying.


Electrostatic Loading

As mentioned, the powder coating gun does its job by charging the powder. For the powder coating to stick, powder particles are drawn to your parts by electrostatic force. Powder coating guns have adjustable settings to accommodate different types of powders and different part shapes.


Spraying Control

Another main use of the powder coating gun is to control the painting in the powder coating process. The gun can adjust parameters like the powder coating pressure, speed, and angle to achieve a uniform finish.


Powder Flow Control

Some powder spraying guns have hoppers with devices like vibratory components and adjustable baffles that regulate powder flow. These devices and mechanisms' main role is maintaining and controlling a consistent powder flow to the powder coating gun, hence smooth, quality finishes and reduced waste.


Powder Deposition

Powder-coating guns play a crucial role in this process, where the charged particles are attracted and adhered to parts. They ensure the finished surfaces have a smooth, uniform layer.


Types of Powder Coating Guns

Automatic Powder Coating Guns

Automatic powder coating guns are operated by other powder coating systems that control their movement, enabling them to apply the powder coating automatically. A great property of this type of powder-coating gun is that it is highly accurate and does not result in any discrepancy. This eliminates any unpredictable issues while using manual powder-coating guns.



They offer a smooth, uniform thick film.

It ensures a stable production rate, contributing to efficient and consistent output.

Effectively controlling both the quality and quantity of coating.

It minimizes powder coating waste while extending the lifespan of the filter.

It saves cost on labor and materials since it requires fewer workers.

There is no high voltage drop, which ensures increased coating speed and improved powder coverage.

Manual Powder Coating Guns

The best part about manual powder spraying guns is their user-friendliness, hence their popularity across various industries. Unlike their automatic counterparts, these guns require manual operation.

They ensure the user achieves rapid color changes and a thin film finish on various metal and plastic materials. They are composed of high-quality raw materials, components, and state-of-the-art technologies and are affordable prices.



They are user-friendly; all you have to do is open the manual powder coating gun’s packaging, set up the pick-up tube, and then coat your parts.

They offer fast color change within 3-5 minutes. Cheaper models of manual powder-coating guns can take up to 10 minutes.

The cost of purchasing several hoppers can quickly accumulate if you use different colors and textures. You do not need to add the cost of handling various powders because your powder is already packaged in a box.

The chances of powder contamination are minimal since the hopper is sealed off, and every hopper is used for a single powder type.

Due to improved powder conditioning, the pump uniformly takes up the powder.

Does The Powder Coating Gun Affect Transfer Efficiency?

Easy Yes! Purchasing a powder coating gun from a reliable supplier is key, as its quality will have a significant impact on the effectiveness of the powder coating process.  A high-quality powder coating gun ensures that the powder particles are distributed consistently and uniformly, resulting in a uniform finish.

The gun's nozzle design and function play a crucial role in the smoothness of the final film. Choosing a high-quality powder coating gun ensures it can generate a stable and uniform charge, offering you the ease of use and high efficiency as you finish your parts. Buying a powder coating gun from a reliable supplier is key; its quality will have a  significant impact on the effectiveness of the powder coating process.

Additionally, a high-quality powder coating gun ensures that the powder particles are distributed consistently and uniformly, resulting in a uniform finish. The gun's nozzle design and function play a crucial role in the smoothness of the final film. Choosing a high-quality powder coating gun ensures it can generate a stable and uniform charge when working on a thicker film, and you might need to reduce this setting. Regulating current output when using some models of powder-coating guns can also reduce potential issues. For optimal transfer efficiency, your powder coating gun should be between 6" and 12". 


What Powder Coating Gun Voltage Should I Use?

Kilovolts, or KV, are measured in units of 1,000 volts. The amount of electrical charge that can be released from a powder coating spray gun is calculated in kilovolts. Micro amps are just as crucial but are often overlooked. You can limit KVs by adjusting the microamps, which regulate the voltage flow. Ensure you choose a powder coating gun that you can easily use to monitor the KV and µA while working with intricate parts or coatings. Powder spray guns often come with a  maximum setting of  100 kilovolts. For a single coat, you can use 50 to 80 kV to start with and reduce the voltage for Faraday cage sections.


Factors to Consider When Choosing A Powder Coating Gun

You need the best powder-coating guns to produce durable and attractive coatings. The perfect powder gun will get the job done, and maintenance will not be a hassle. Here are the considerations you should make.


Output Voltage

The voltage level determines the amount of charge applied to the powder particles as they are emitted through the nozzle, so make sure to choose a powder coating gun with an adjustment knob, allowing you to easily control the settings to the most suitable for your application. You should set it at low levels for intricate parts as the powder particles will travel a greater distance. If you are a professional,  consider models with a voltage of  100 kv for optimal performance.



Whether a beginner or professional, you can benefit from a powder coating gun that offers ease of use. Check whether the powder coating gun you have your eyes on comes with a manual you can refer to before and during use. If you are a beginner, ensure you seek information on handling the equipment. Additionally, go for a model that you can easily clean between color changes. One that comes with powder tins is an added advantage. However, this is not compulsory as long as you can easily maintain the one offered.


Spray Rate

Think of this term as the speed at which your powder coating gun can cover an area with liquidized powder in one minute. The spray rate combines the gun's velocity and the amount of liquid it takes to do the job. Ensure the powder spray gun you choose has a spray rate suitable for your application. This will help you save time and cost during the powder coating process. A powder coating gun that features a high spray rate is great for large-scale production processes. However, ensure you are careful during gun setup to avoid wasting powder.


Replaceable Tip and Nozzle

Powder-coating guns have nozzles and tips that come in various designs and types, each of which impacts the spray rate. Additionally, how the liquidized powder flows can be influenced by the variety of nozzles you use. For instance, large nozzles are designed to release larger cloud particles, making them ideal for large parts, while small ones allow a thin streamed flow suitable for smaller parts. Ensure you choose one that has replaceable nozzles and tips.



Like with any other piece of equipment, Investing in a powder spray gun means you can count on its efficiency for years to come. The best guns are constructed from high-quality materials resistant to rust, corrosion, and grease. Make sure the one you choose can handle extreme working conditions.



By investing in a quality powder coating gun, you can significantly reduce preparation time and effectively cover more parts. This will ultimately help you save costs and time. To achieve optimal transfer efficiency, it is crucial that you carefully choose the right powder coating gun for your specific application while ensuring you use the appropriate conditions for the parts being coated. This involves managing surface distance, air pressure, and travel speed across the substrate.

It would help to test the powder coating gun before starting any project for better success. Improved transfer efficiency will get you better outcomes with fewer complications. This applies to all the powder coating processes, even in the rare instances where optimum consistency is not the primary goal, whether you're utilizing a continuous or batch coating technique. Enhanced transfer efficiency will benefit you in terms of better finishes and more efficient production. Ramseier Koatings offers high-quality powder-coating guns for different applications. Contact us today!


Which is the correct gun distance during the powder coating process? You should ensure a 6”-12’’  distance to achieve good transfer efficiency.

What is the cause of the powder coating gun failing to show any Kv reading? If you encounter such an issue, a power cut to the gun might be the cause. Other causes can be a failed circuit board or malfunctioning internal components of the gun.

Why is my powder-coating gun experiencing a power surge? One cause could be powder route obstruction due to accumulation or impact fusion. Examine the barrel, powder pipe, and pump mechanism. Another reason could be insufficient supplemental or forward air to effectively keep your powder suspended while being transported to a powder hose. It would also help to check for any issue with the gun's hopper, for instance, a leak in the seal of the injector and lift tube.

What is the key difference between manual and automatic Corona guns? These two types have similar functions and operations. However, the build of the two types is significantly different.  The automatic powder coating gun is clamped into place and does not entail a trigger. In addition, you can clean the electrode of this gun using a rinse air path. They also have a protective sleeve.

How regularly should I clean my powder coating gun? It is recommended that you clean the spraying gun after every color change. Also, ensure you purge your gun, pump, and hose to prevent moisture from settling in the powder and clogging things up for the next use. You can inspect your gun weekly for worn-out components and do the required replacements. The amount of liquidized powder you spray and the interval of color changes determine how often you should clean your powder coating gun.

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