One of the well established methods to providing a finish to most parts is using powder coating companies. The process has been around for over four decades. It uses no solvents, unlike paints, but is applied electro statically before being heated to create the finished layer.
This method has many advantages over regular painting such as uniform, thick coat on both vertical and horizontal portions, produces less dangerous waste that can be almost fully recycled and allows special effects to be created. One disadvantage of this process is the inability to create smooth thin layers.
The grain comes in two types - thermosetting or thermoplastic. On being exposed to high temperatures, thermosetting particles undergo a chemical reaction and are transformed into a tougher polymer. Thermoplastic, on the other hand, just simply melts and flows to form the coating. These polymers are mixed with hardening agents, heated and made into sheets which are then powdered.
The first stage in the Powder coating process is preparing the component. Items to be finished may already contain dirt, oils, rust and other material on the surface and have to be completely eliminated first. These can be removed using mechanical or chemical means depending on the material and the size of the part. Mechanical methods involve blasting with fine abrasives of different materials. Chemical methods use phosphates which are being replaced by other agents as it is environmentally toxic.
The powder is applied electro statically in the next step in many ways. Electrostatic guns make the particles electrically charged and hence attracted to the component which is grounded. It can be heated and dipped in the powder which melts to form thicker layers. Alternatively the particles are electrically charged to form a cloud and when the part is exposed to this, they are attracted and stick to the surface forming a layer. A technique using high speed rollers can be used for flat exteriors.
The detail with a layer of powder is heated to high temperatures in a process called curing. The thin, durable, final layer is formed. Its specifications can be controlled by varying the temperature and the time the part is exposed to the heat.
Dust coating has been applied to thousands of items ranging from automobile and motorcycle parts, domestic appliances like fridges, metal furniture. Theoretically, it can be applied to anything. The only requirement for the item is good heat-resistance.
Powder coating companies are widely used because they are economical. The raw material can be recycled so it generates very little toxic waste. This also allows for tremendous flexibility when it comes to creating artistic and colorful finishes.
This method has many advantages over regular painting such as uniform, thick coat on both vertical and horizontal portions, produces less dangerous waste that can be almost fully recycled and allows special effects to be created. One disadvantage of this process is the inability to create smooth thin layers.
The grain comes in two types - thermosetting or thermoplastic. On being exposed to high temperatures, thermosetting particles undergo a chemical reaction and are transformed into a tougher polymer. Thermoplastic, on the other hand, just simply melts and flows to form the coating. These polymers are mixed with hardening agents, heated and made into sheets which are then powdered.
The first stage in the Powder coating process is preparing the component. Items to be finished may already contain dirt, oils, rust and other material on the surface and have to be completely eliminated first. These can be removed using mechanical or chemical means depending on the material and the size of the part. Mechanical methods involve blasting with fine abrasives of different materials. Chemical methods use phosphates which are being replaced by other agents as it is environmentally toxic.
The powder is applied electro statically in the next step in many ways. Electrostatic guns make the particles electrically charged and hence attracted to the component which is grounded. It can be heated and dipped in the powder which melts to form thicker layers. Alternatively the particles are electrically charged to form a cloud and when the part is exposed to this, they are attracted and stick to the surface forming a layer. A technique using high speed rollers can be used for flat exteriors.
The detail with a layer of powder is heated to high temperatures in a process called curing. The thin, durable, final layer is formed. Its specifications can be controlled by varying the temperature and the time the part is exposed to the heat.
Dust coating has been applied to thousands of items ranging from automobile and motorcycle parts, domestic appliances like fridges, metal furniture. Theoretically, it can be applied to anything. The only requirement for the item is good heat-resistance.
Powder coating companies are widely used because they are economical. The raw material can be recycled so it generates very little toxic waste. This also allows for tremendous flexibility when it comes to creating artistic and colorful finishes.
About the Author:
BCA specializes in powder coat finish. Visit them online for details! (http://www.bcapowdercoating.com)
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