Control of production parameters of bump hot stamping process
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The process parameters of bump hot stamping include hot stamping temperature, hot stamping pressure and hot stamping speed. The setting is different from ordinary hot stamping.
1. Hot stamping temperature
The hot stamping temperature is higher than the hot stamping temperature, and is generally controlled at 110 to 150 °C. The hot stamping temperature is too low, the electrochemical aluminum adhesive layer and the peeling layer cannot be fully melted, and the transfer of the electrochemical aluminum is incomplete, resulting in hot stamping or bottoming; and if the hot stamping temperature is too high, the paper will be excessively deformed, and the image will be overwhelmed. The writing is unclear, and even the phenomenon of discoloration of the electrochemical aluminum occurs. At the same time, if the temperature is too high, the hot stamping plate may expand too much, and the precise matching with the bottom mold may result, resulting in poor hot stamping.
2. Hot stamping pressure
The bump hot stamping pressure is larger than the ordinary hot stamping, and the uniformity is high. Therefore, the pad and the pressure are important when the plate is installed. It is necessary to suppress the unevenness and ensure that the pressure on the hot stamping surface is substantially uniform. Excessive pressure may crush the hot stamping foil and even crush the bottom mold and the hot substrate. If the pressure is too small, the transfer of the hot stamping foil may be incomplete or hot stamping, and the three-dimensional feeling of the concave and convex is not strong. , can not meet the quality requirements.
3. Hot stamping speed
The hot stamping speed is slightly slower than ordinary hot stamping. In the bump hot stamping, it is necessary to consider the recovery time of the paper deformation, the air discharge time, the time of the anodized aluminum and the hot stamping surface, and the speed is basically controlled at 3000 to 4000 sheets/hour. .