Hot stamping principle and process conditions

The main material of hot stamping is anodized aluminum, also called hot stamping foil. It consists essentially of two thin layers, a polyester film substrate and a transfer layer. During hot stamping, the transfer layer is imprinted on all or part of the surface of the printing object by virtue of heat and pressure. When hot stamping is completed, the polyester film edge is torn off together with the part that has not been transferred.

The stamping process is divided into four steps:

1. The hot stamping foil is in contact with the substrate;

2. By virtue of heat and pressure, the thermal transfer layer is fused and transferred to the surface of the substrate;

3. Remove the pressure and peel off the polyester film;

4. Feed hot stamping foil and replace it with the printed parts to be hot stamping.

The hot stamping effect mainly depends on the level of temperature, pressure and hot stamping time. In addition, it is also necessary to consider whether the substrate, hot stamping machine, hot stamping machine fixture and backing plate are suitable, or to study the environmental conditions, including indoor temperature, substrate temperature, indoor air cleanliness (dust content), temperature, etc.

1, hot stamping foil, there are two categories of reel and single foil, the reel can be divided into different models according to the printing material. The influence of many factors, such as ironing suitability, speed, temperature, pressure, quality of hot stamping plate and pad plate technology, tension adjustment of anodized aluminum, machine condition of hot stamping machine, etc., and the speed, temperature and pressure of hot stamping suitability are important. The performance of various types of anodized aluminum is different, and the suitable printing materials are also different.

2, hot stamping temperature, hot stamping temperature is too high, will make the hot stamping imprint lose metal luster blistering, edge is not clear or even paste plate, hot stamping temperature is too low, will not be hot stamping, hot stamping is not strong or handwriting hair.

3, hot stamping pressure, hot stamping pressure is too large, will lead to paste or handwriting paste, hot stamping pressure is too small, hot stamping foil and substrate can not adhere, and can not cut hot stamping foil hot stamping part. The installation of hot stamping foil should not be too tight or too loose. If it is too tight, the handwriting will be broken. If it is too loose, the handwriting will be unclear.

4, hot stamping speed, hot stamping speed actually reflects the contact time between the substrate and the hot stamping foil when the people are hot stamping, which directly affects the hot stamping fastness. Too fast hot stamping speed will lead to hot stamping or blotting. Stamping speed is too slow, which will not only affect the quality of hot stamping, but also affect the production efficiency.

In the process of hot stamping, the speed, pressure and temperature restrict each other, and the process parameters are always determined according to the order of hot stamping speed, pressure and temperature. First determine the hot stamping speed, under normal circumstances, not its constant processing, not easy to change. Then find out the corresponding hot stamping pressure and hot stamping temperature. In this way, the operation procedure can be simplified and the quality of hot stamping can be easily controlled.

5. Hot stamping machine, according to the hot stamping method, the hot stamping machine can be divided into three types: flat pressing, round pressing and round pressing; according to the position of the hot stamping plate, the hot stamping machine can be divided into vertical and horizontal.

6, the substrate, hot stamping is also called the substrate, the printed matter of hot stamping includes offset paper, coated paper, white cardboard (cardboard) cloth paper and lacquer cloth, plastic products, etc.

In addition, the resin version can also replace the copper and zinc version for hot stamping, as long as the master of temperature and pressure with, can also be hot out of a good product. 1), temperature control is very critical, it is directly related to the quality of hot stamping, the temperature is too high resin version will be burnt, hot stamping foil by the influence of temperature will also produce adhesion phenomenon, hot words blurred, the temperature should be determined according to the quality of the tree version. 2), because the resin version has toughness, so do not use too much pressure, hot writing will be very clear. 3), resin version of the fixed with double-sided tape, this tape will not affect the heat insulation, easy to grasp the temperature.

The operator of the hot stamping machine must pay attention, work with hands and feet simultaneously, and keep a certain distance from the hot stamping heating plate to avoid accidents. Please read the random instruction manual carefully for machine adjustment.