June, 2012
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Difference between cold rolled steel and hot rolled steel
COLD ROLLED STEEL:The most common of the metals encountered by the jobshop powdercoater, this product is roll formed to a close tolerance and a fine surface finish, suitable for stamping, forming, and moderate drawing operations. This material can be bent flat upon itself without cracking. Good base for phosphate conversion coating. Pretreatment recommendations are Clean, Phosphate, rinse, and seal or deionize rinse. HOT ROLLED STEEL:A low carbon steel suitable for forming, punching, welding, and shallow drawing. Surface has normal millRead More …
What is zinc,zinc casting and zinc plating
ZINC:A bluish-white, metallic chemical element, usually found in combination such as in the zinc rich epoxy primer,used as a protective coating for iron, as a constituent in various alloys, as an electrode in electric batteries, and in the form of salts in medicines. Symbol Zn atomic weight = 65.38 atomic number = 30. Melts at 419.5 degrees C, or approx. 790 degrees F. ZINC CASTING:Zinc in a molten state is poured into a form and allowed to solidify and formRead More …
Production profiling of powder coating limits product liability risks
Risk management is a real concern for every business, and powder coating is no exception. The product liability of providing a poor quality powder coatings finish could range from re-coating a few simple parts to the replacement of all products damaged by underexposure or overexposure to heat (a complete product recall). The only way to totally manage risk is to be in total control. In turn, verification of control can only be certain when measurements are taken by proper testingRead More …
Production Profiling improves sales of powder coating products
Total Quality Management (TQM) and quality driven management systems such as ISO 9000, QS-9000 and Community European (CE) marking have redefined the meaning of quality partnerships. Many powder coaters have begun profiling all of their production runs, not only to reduce their product liability risks and reduce their operating costs, but also to send quality documents along with all of their shipments. This proves quality to their existing customers by helping to ensure their long-term loyalty. Manufacturing companies are sureRead More …
How to select a proper powder for your products
Choice of resin system, hardener, and pigment is just the beginning in selection the properties that one may require of the finish. Control of gloss, smoothness, flow rate, cure rate, ultra violet resistance, chemical resistance, heat resistance, flexibility, adhesion, corrosion resistance, exterior durability, ability to be reclaimed and reused, total first time transfer efficiency, and more, are some of the factors that must be considered when any new material is manufactured. Thermosetting powder coating are classified into five basic chemicalRead More …
Screen your powder before application
Screening of powder coating powder is very important,that will separate out contaminants, insure uniform particle size distribution,and allow the system operator to fine tune the application equipment without puffing or surging for maximum transfer efficiency and finish quality. Actual on-line test results have shown that screened powder will cover much more area than the same material unscreened. The most common reason that powders puff and surge during application is due to the lack of screening. Powders may become compressed inRead More …
General reasons for pin holes in a process of powder coating wheels
You will be experiencing pin holes when you powder coat wheels of cast aluminum . Pin holing can be caused by several different things, in this case I would say that the alloy wheels are porous and the air in the pore is expanding when the parts are heated in the oven. The air then escapes into the powder film when the powder is in the liquid or melted state and as the powder solidifies during the curing process theRead More …
Some common sources of airborne contamination during powder coating application
Electrostatically applied powder can entrain airborne dirt and deposit it on the parts. They are the hardest to track and eliminate because they can come from so many different sources. Keeping a clean environment around the system is one of the best ways to reduce air borne dirt.The list below names some of the common sources of airborne contamination during powder coating application Process Equipment – The conveyor, the oven, the washer or other operations within the coating line can generateRead More …
Adhesion problem of powder coating application
Poor adhesion is usually related to poor pretreatment or under cure. Undercure -Run an electronic temperature recording device with a probe on the part to ensure that the metal temperature reaches the prescribed cure index (Time at temperature). Pretreatment – Perform regular titration and quality checks to avoid a pretreatment problem.Surface preparation is probably the cause of the poor adhesion of the powder coating powder. Not all stainless steels accept phosphate pretreatments to the same extent; some being more reactiveRead More …
Advantages of wood powder coating on wood furniture
Several furniture and cabinetry manufacturers have had success with wood powder coating MDF. Pigmented powder applications to MDF have been developed and used more extensively than coating of natural wood, or clear coating of MDF. Establishing a new system may require significant research and production trials to achieve desired process efficiency and final product quality. Powder coatings has a high transfer efficiency, reduced (or no) emissions, one-step, one-coat process, elimination of edge banding, significant reduction of exhaust and oven ventilation air,Read More …
D5 Creation