QR Code QR Code
Post Offer Free
Hangzhou Color Powder coating Equipment co.,ltd.,
Hangzhou Color Powder coating Equipment co.,ltd.,  

Gold Index: 32290

You are here: home  > Powder Coating Lines  > Aluminium profile powder painting line  > Powder coating line for aluminum panels

Powder coating line for aluminum panels 

Payment Terms: T/T 
Place of Origin: Zhejiang, China (Mainland) 
inquire skype
Add to My Favorites
HiSupplier Escrow
Share |

Product Detail

Means of Transport: Ocean
Packing: nude packing
Production Capacity: 1set per month
Delivery Date: 30days

PVDF painting plant
1.first-class brand, the century enterprise
2.good in quality
3.reasonable in price

Powder coating is a dry finishing process,using finely ground particles of pigment andresin that are generally electrostatically charged and sprayed onto electrically grounded parts.The charged powder particles adhere to theparts and are held there untilmelted and fused into a smooth coating ina curing oven. Before coating,the parts to be coated are firstpretreated similarly to conventional liquid coated parts. The pretreatment process is normally conducted inseries with the coatingand curing operatios.      

Thereis essentially two common ways of applying powder coating: by electrostatic spray and by fluidized bed powder coating. There areseveral other processes that have been developed, butthey are far lessused. These include flame spraying, spraying with aplasma gun, airlesshot spray, and coating by electophoretic deposition.
To get an overview of the technology used in the powder coating industry click on the items below:

  • pretreatment

  • Electrostatic Spray

  • curing

  • Pretreatment.

    Phosphating,or conversion coating, is theapplication of an iron or zinc phosphatecoating to the substrate.Conversion coating can be a very critical partof the pretreatment process, adding significantly to the performance ofthe finished coating.A phosphate coating converts the metal substrateto a uniform, inertsurface, which improves bonding, minimizes thespread of oxidation if thecoating is scratchedand improves the overall corrosion resistance of thefinal part.

    Aconversion coating can be iron, zinc,polycrystalline, chromate, ormanganese phosphate film. They aredeveloped on both ferrous (ironbased) and non-ferrous surfaces (zinc,aluminum, terne and manganese).Parts are subjected to an acidic bath anda chemical conversion forms acomplete film on the part surface,changing the chemical and physicalnature of the metal surface.

     

    Electrostatic Spray

    Electrostatic spray powder coating uses a powder-airmixture from a small fluidized bed in a powder feed hopper. Insomecases, the feed hoppers vibrate to help prevent clogging or clumping of  powders prior to entry into the transport lines. The powder issuppliedby a hose to the spray gun, which has a charged electrode in the nozzlefed by a high voltage dc power.

    Electrostatic powder spray guns direct the flow of powder; control the deposition rate; control the pattern size, shape, anddensity of the spray; andcharge the powder being sprayed .The spray guns can be manual(hand-held) or automatic, fixed or reciprocating, andmounted on one or both sides of a conveyorized spray booth. Electrostatic spray powder coating operations use collectors to reclaim over-spray.This reclaimed powder is then reused, adding significantly to the powder coating's high transfer efficiency.

    There are various gun designs that mainly differ in the method of applying electrostatic charge to the powder. In some cases,the powder is electrostatically charged by friction. The advantage is that the powder is free to deposit in an even layer over the entire surface of the part,and deposition into recesses is improved.

    The film thickness is dependent on the powderchemistry, preheat temperature, and dwell time. Film thicknesses of (40 -60 µm) in case of plain powder ( 80 – 100 µm) in case of texture cangenerally be applied on products.

    Curing

    When a thermoset powder is exposed to elevated temperature, it begins to melt, flows out, and then chemically reacts to form a higher molecular weight polymer in a network-like structure. This cure process, called cross linking, requires a certain degree oftemperature for a certain length of time in order to reach full cure andestablish the full film properties for which the material was designed.Normally the powder scure at 200°C (390°F) in 10 minutes. The curing schedule could vary according to the manufacturer's specifications.

    The application of energy to the product to be cured can be accomplished by convection cure ovens or infrared cure ovens.

 

bigPhoto
skype Ms. sally xu
sales manager
Tel: 86-571-88194898
Fax: 86-571-86015003
Mobile: 86- 139 0650 8694
Contact to this supplier

Didn't find what you're looking for? Post Buying Lead or contact HiSupplier Customer Service Center  for help!

Related Search

Find more related products in following catalogs on Hisupplier.com

Related Products

Company Info

Hangzhou Color Powder coating Equipment co.,ltd., [China (Mainland)]


Business Type:Manufacturer
City: Hangzhou
Province/State: Zhejiang
Country/Region: China (Mainland)

Follow Us: Follow us on facebook

sally:   skype
sally:   qq

You May Like: