Posted on June 30, 2019
Metallic Powder Coating Process – Problem & Solution
Metallic Powder Coating Special Effect Systems
Metallic powder coatings are ornamental protecting finishes for steel completing applications. The multi-coloured metallic powders are often carried out with unmarried software, and then it’s far top-covered with clear powder to decorate the end even greater.
Metallic and mica powder coatings incorporate steel flake or mica particulate rely that offers these coatings their special look. These flakes and particulars are a freestanding element. Metallic and mica powder coatings are homogeneously mixed with a base colour powder and are called Dry-Blended powders. They are available in Epoxy, Hybrid, Urethane, and TGIC Polyester chemistries.
The issues faced with dry-blended powders are with coloration consistency, limited penetration in recessed regions, and their restricted capability to be recycled. Dry-combined powders are normally implemented using a corona gun with a flat spray nozzle. Metallic and mica powder coatings are processed by using physically bonding them to the surface of the powered coating. Generally, all the steel or mica particles are bonded, but some might not be firmly connected and may cause numerous issues within the finishing system.
Bonded steel and mica powder has fewer lines than dry mixed powders and are greater with no trouble recyclable. In addition, in addition they provide colour this is extra steady after recycling and less picture frame effect, as well as a better penetration and better switch performance. Even although bonded metallic and mica powder can be reclaimed, it’s miles continually high-quality to decrease the ration of reclaimed powder to virgin powder so you will produce the first-class feasible end. Bonded powders are to be had in Epoxy, Hybrid, Urethane, and TGIC polyester chemistries.
Metallic powders do have a few drawbacks related to them. The first being that aluminized powder finishes do will be predisposed to appearance weathered with time. Another downside is loading, which is an uncontrollable lack of electrostatic high-voltage energy at the tip of the spray gun and happens due to the fact the metal powder has created a ground path through the powder hose for the excessive voltage to journey. To reduce loading, a in particular designed spray muzzle can be used if the quantity of steel inside the powder isn’t always excessive.
The use of steel powder has been the purpose of numerous spray sales space fires. Spice powder coatings are precise blends of multiple completed powder hues, ensuing in a extraordinarily aesthetic and defensive coating. These multi-coloured powders are available in Epoxy, Hybrid, Urethane, and TGIC Polyester chemistries. Spice powder coatings are most often used for end use programs along with informal furnishings, shelving, case goods, and amusement device. However, spice powder coatings can be used for other objects.
Spice powder coatings do pose some demanding situations for the applicator whilst as compared to the use and alertness of easy, solid coloration powders. Therefore, applicators need to apply a steady and even sample to assure film thickness consistency and convey a nice appearance. Because of the nature of the spice powder coatings, the colour and look may range whilst the powder is reclaimed. In addition, substrate density can have an effect on flow and look of the finished product.
TIPS ON HOW TO SPRAY METALLIC POWDERS –
Since metallic powder of this kind is made by using adding natural finely floor mica or aluminum or bronze particles, you’re definitely spraying a mixture of both the plastic powder and the first-class aluminum powder mixed with it. With one-of-a-kind guns the steel debris in relation to the ground object might also orient themselves in another way. The orientation of the aluminum debris will determine the final finish.
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2. Preferably use Dipstick or gravity cup so that fluidization air drift does no longer disturb particle size distribution. 3. Increase distance among gun and item to at the least eight inch or extra.
4. Try with unique nozzle specially soft drift nozzle.
5. Make sure that the powder lined fabric is put instantly in an oven temperature of 200ºC —- if the oven may be at room temperature, the coating will waft at 150° and disturb the feel therefore growing a smooth end.