Application of new powder coating production line

Recently, American desk company in the United States adopted a new coating production line, which improved production efficiency by 50% Any paint coating manufacturer must consider such important issues as coating cost, coating product quality and coating process production efficiency when replacing oil coating with powder coating for coating For American desk, the fundamental problem is to find a good painting system American desk is a major producer of office furniture and utilities Its products include classroom, concert hall, gymnasium, dormitory and laboratory facilities American desk's two original high solid oil separation coating lines have been in operation for 30 years The driving force for the company to replace the oil coating line with the powder coating line is the increase of waste treatment cost and the limit standard of solvent emission in the coating process At the same time, the operating cost of oil coating line increases faster than the profit of coating products The new powder coating line enables American desk to produce high quality products in a cleaner environment at a lower cost Not to mention that it can adapt to the new environmental regulations in the future Design of coating system in January 1993, American desk company removed an oil coating line and built a new powder coating line The construction of the powder coating line takes about 6 months, during which all products are coated on the remaining oil coating line After the powder coating line began to operate, the company removed another oil coating line in September 1993 Powder coating system includes: five stage washing tank; 6min drying furnace; two powder coating spraying rooms, each with 14 powder spray guns; two oil coating spraying rooms; 25min baking furnace; 1700 foot long closed-circuit conveyor belt with three driving units It's really difficult to put all of the above equipment in a place of only 9500 square feet In addition to two powder spraying rooms, the coating line also retains two oil-based coating spraying rooms American desk hopes to meet the coating processing needs of customers in small batches of special colors through this flexible design Nordson is the contractor of the coating line, responsible for the design and construction of the coating system and the installation of equipment including conveyor belt, oven, powder coating spraying room, etc Milbank systems provides the washing tank and oven for the coating line This five stage sink has a stainless steel top cover The first section has an alkali washing device, the third section has an acid pickling device and a phosphating device There is a chemical concentration detection control device on the washing tank The coating line is also specially designed for aluminum or steel products pretreatment device The four sides of the drying furnace and the baking furnace are insulated, which can effectively recycle the heat and reduce the energy consumption The increasing cost of waste treatment and the limited standard of solvent emission promote the conversion of high solid oil separation coating into powder coating for coating The Nordson versa screen system can control many painting process parameters, including starting the automatic spray gun The powder spraying equipment includes two sets of Nordson Excel 2000 (R) spraying rooms, which can switch the powder coating of different colors on the same coating line When painting the workpiece with complex shape, it needs manual spraying The manual spraying equipment is installed in front of the automatic spraying equipment In this way, the Faraday cage shielding effect of powder can be effectively prevented, and the amount of powder used for manual operation can not be too large When choosing powder coating equipment, safety is also very important Insurance companies need documents on equipment safety Paul Kerr, chairman of American desk, explained: "Nordson provides the operating manual for the entire production line." With the improvement of production efficiency, the production efficiency of the powder coating system is increased by 50% ~ 100% by improving the line speed and the suspension technology of the workpiece The proper shelf design and the suspension technology of the workpiece are very important "Moving from liquid paint to powder paint, we redesigned the shelves and increased their density," Kerr said It is estimated that the production capacity of two shifts a day in powder coating line is larger than that of three shifts a day in the original liquid coating line The scrap rate of the product decreased significantly, from about 10% of the total output to 2% American desk reduces costs by increasing productivity and reducing waste, Kerr said: "you can't judge the system just by cost and productivity In addition, the coating quality of products can not be achieved by traditional means Our customers immediately noticed that the current coating products not only have ceramic luster, but also have better durability "The new powder coating system has brought us environmental benefits and improved the working environment of our employees." Kerr went on to say, "the paint line used to be the dirtiest place in the factory Now we have a powder line for people to visit."