european finishing technologies coming to iwf 2002: part ii; roller, curtain, and vacuum coating and drying. (finishing newsfront).

by:ZHENHUA     2020-09-02
This is the second part of an article on surface treatment Innovation published at the ligna plus 2001 exhibition, many of which will be presented in the United States for the first time in August by IWF. 22-25 in Atlanta.
The second part focuses on the drum, curtain, vacuum coating and drying.
The first part published last month, with covered finish materials, sanding and spraying, is available on www. iswonline. com.
Roller coating is more common in Europe, from High
VOC for more eco-friendly materials is under development.
Most large manufacturers have been replaced and small and medium-sized manufacturers are following up.
Finishing before assembly using roller coating technology is currently more common in Europe than in North America, where finishing of assembled products is a more common practice.
We believe that for most products, pre-assembly finishing will evolve with more efficient technology.
Burkle brought up a complete re-Roller designedcoating system.
The system allows for quick cleaning and color variations that can be used to apply oil and wax as well as more traditional finish materials.
Burkle also added systems using jet dryers, UV dryers, special material handling systems
House and new decoration-
Printing Machine for printing engineering wood products.
Hymmen presents a new roll coating system, CombiCoater ULX-S.
The company also showed Hymmen-
Sleeve system, a system that can be placed on the steel application roller and screw by air cushion sleeve.
Only the sleeve needs to be replaced when it needs to be replaced, not the entire roller.
Sorbini laser Goater Cefla proposed completion.
The innovation of this roller coating equipment lies in the laser-
Roller technology based on engraving application.
Elmag Superfici presents a new type of rapid roller replacement roller coating equipmentover system.
The company also showed a lot.
A color printing machine called ST, which can print imitation products on wooden products, or improve lowvalue veneers.
Barberan showed a lacquer.
Decorative printing press for printing wide medium fiber boards and HDF panels.
Barberan\'s system is also suitable for up to 2,400mm [95 inches]
Widely used water
Base paint, then UV-
Based on the top coating.
Despite the fact that all of this is good, the interest in curtain coating has weakened
Well-known equipment manufacturers in Europe provide curtain coating equipment and only a few pieces have been found on ligna plus.
Curtain coating is losing importance because of the new low
The VOC finishing system requires a very thin layer of material.
Only in places like southern Europe where the thickness of polyester and polyurethane based lacquer is more than 100g /[m. sup. 2][0. 33 ounces/square feet
It is common for certain types of furniture, which is also the coating technology that people are still interested in.
Environment-
On the other hand, friendly vacuum technology has improved in terms of importance, and vacuum coatings have been used more frequently.
This technology depends on solvent. free water-
Based on or UV paint, no excess will be produced
There is little material to spray and waste.
With UV paint, Layer 6g /[m. sup. 2][0. 02 ounce/sq ft]
Can reach the width of 600 [24 inches]
Feeding rate up to 50 m/min [164 ft/min].
Schiele provides a vacuum coating machine that can complete the door frame components with uv paint.
The coating machine has a special application head that can complete components of different widths.
The company also offers products to complete the edges of the window components and seal the edges of the laminate floor.
Low Display of general finishing system
Cost, a small vacuum treatment system that can also be used in the laboratory.
Giardinashow vacuum-
Basic system of coating molding.
Delle vedove demonstrated its first vacuum coating machine, a compact device for sealing the edge of the floor with special wax.
The innovation of drying technology most of the innovation of drying technology is aimed at water.
Instead of UV curing.
Drying time of water
At present, the solvent-based system is still longer than the solvent
Because the evaporation heat required for water is about three times that of conventional voc.
Rippert showed off its dry air system.
Air to be used to dry water drybased lacquers.
The humidity in the air is transferred to the absorbing medium, which reduces the required heat.
On the other hand, Venjakob uses its Hydrex drying technology, a system that condenses moisture from the air by cooling the air and then re-drying it
Heat dry air and absorb more water from the surface.
According to the thickness of the layer, a drying time of 4 to 10 minutes is possible, the company said. Hymmen-
Hackernack shows a new generation of verticalsdryers.
This system is designed for slow drying water with thick layers. or VOC-basedmaterials.
The system is able to create separate temperature areas for the flash in the oven
Dry or cool.
Depending on the thickness of the surface materials and layers used, a drying time of about 1 hour can be achieved.
Cefla sorts out a new generation of vertical belt traydrying-systems.
The system adopts a new and more accurate air control mechanism. Gas-
Infrared drying is introduced in general finishing system.
This system is in 650-950C [1202 -1742F]
Create a flame that emits infraredlight.
This is combined with fast flowing air with high ambient temperature, allowing parts to be dried in seconds.
The company says the gas infrared dryer uses less energy than the electric dryer and does not require a flashoff time.
Triab, a Swedish oven producer, showed a UV-
Powder for thermal material.
In this oven, UV
Powder flows in a few minutes and then cured by UVlamps.
There is no doubt that the speed of change has not diminished, and some of the features of the wood product are as important to the buyer as the \"look\" of the surface.
This is not surprising because the properties of the surface are the most prominent part of the product.
In addition, more eco-friendly products and technologies, coupled with stricter regulations, also force the industry to adjust new materials and technologies.
However, innovative solutions continue to enter the market.
Only by constantly adapting to more advanced, cheaper and greener surface treatment solutions and continuous employee education can companies compete successfully in the market.
Urs Buehlmann is an assistant professor and extension specialist in the Department of wood and paper science at North Carolina State University.
Schleusener is an honorary professor at the Swiss Institute of Wood Industry Engineering.
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