The final step in the laminate manufacturing process is the rolling of the press load and the finishing of the resulting panel. The beginning was to move the stack of paper (ie "books") from the press exit cage to the rolling station. The liner paper associated with the pile of paper is taken away and stacked to be reused or discarded as waste. Use a suction cup conveyor to pick up the polishing plate, send it to storage or send it to the stacking point for immediate reuse. If paper with aluminum foil or coated paper is used as the surface texture, remove it or discard it. The next layer is two back-to-back laminates. They are separated from the release paper by oscillation.
The upper laminate is placed on a conveyor for the finishing process. The other laminate reverses and removes the textured paper. Then place it on the conveyor and send it to the finishing. Repeat the process for the other stacks. The back side of the plastic laminate is sanded to remove the release material from the core paper and exposes a number of fibers. This is necessary to ensure adequate adhesion of the laminate to the base material.
There are three types of adhesives that are widely used in high pressure laminates: contact adhesives, urea-formaldehyde resins, and polyvinyl acetate vinegar (white latex). Any laminate must be able to satisfactorily utilize each of these adhesives.
Many attempts have been made to develop a laminate that does not require sanding on the back. This eliminates the grinding process and the waste that has not been removed by sanding. But so far these efforts have not yet achieved results. Other finishing operations include trimming the entire four sides of the laminate to remove excess and extrudate and any other burrs. Trimming operations are often combined with jobs that cut the panel to the specifications required by the user. Trimming is usually carried out with a high speed rotary knife with a dust collection system. The use of a roll shear solution is more energy efficient and less noisy. The latter method has been used in Europe for several times. The panels cut to the required specifications are packaged and shipped to complete the process.
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