The principle is simple: 1. Preparation 2. Coating 3.Decoration
The process has been analysed to verify the supposed qualities: stereoscope observation, microscope test with infrared rays, electronic scan microscope test, valuation of the brightness, thickness, adherence, hardness, embossing test, impact resistance, accelerated ageing test, boiling water resistance test, condensed water resistance test, cutting, milling, drilling, flaring, slicing. All these test for the best result. – Preparation and coating The clean and uniform surface receives a traditional pre-treatment of a chemical conversion creating a thin layer
Electrostatic distributors apply a 60 micron layer of powder paint . The polymerization is done with a 180-200° C temperature for 20-30 minutes. The base color grants the hardness of the final product, protects the metal from light, bad weather conditions, abrasion, corrosion and humidity.
Pre-printed film or paper transfer with organic photo sensible pigments and cellulose resin, completely cover the metal surface. Through a vacuum suction system all inside air is taken away. This procedure permits the complete attachment of the film ( paper) on the piece and the perfect result of the thermo-print. Then the sheets , profiles ,… are placed in a special oven where the decoration takes place, physical phenomena in the substance changes directly from a solid condition into a gas condition. The piece stays in the oven for some seconds up to 10 minutes, at 200-220° C. After cooling and the solidification of the paints, the film ( paper) will be removed. Heat, pressure and time are together responsible for the result of the process. In our process, as a consequence of the high temperature the molecules of the used pigments, that have a weak linking in between them, disperse as a gas moving from the printed paper support into the synthetic layer of paint where they join in exactly the same color and original position as on the paper support. The elements that determine the quality and the result of this process are: temperature, time and mechanical pressure as a result of the vacuum system.
Heat Transfer Machine for profiles
This machine is manufactured in two models:
Three kinds of working tables can be loaded .
– Blanket working table for profile and small size products
– Blanket working table for sheet
– Sucking heads working table for complex slot profile
Sheet Washing Machine
This is an automatic mechanical pretreatment machine for degreasing, texturing, passivation and complete drying process. It’s a fast cleaning plant, overturns the traditional immersion phosphating process. The chemical wash and water rinse process is done by a series of rollers, which is more efficient and effective than dipping pretreatment. Specially, this pretreatment machine can avoid creating damage to thin sheets during dipping handling. This machine can wash 100-120 standard sheets (thickness of 0.4-2.5 mm) per hour.
This machine is composed of 3 groups of round brushes and 3 groups of rubber rollers. It applies face to face rolling structure. It reduces brushing demand. Each group rotates quickly in forward and reverse direction. The whole machine works continuously and the washing effect is uniform. The sheet both surfaces can be washed at one time. Production efficiency and percentage of passivation have been enhanced greatly. This machine needs only 2 workers for operation.