In China, anodized hot stamping has become an indispensable method of surface decoration for modern packaging. However, in addition to having a pleasing, eye-catching, or eye-catching effect, packaging cartons must also convey certain product information. In order to facilitate the display of modeling, it is necessary to have the function of protecting the goods. To achieve the above purpose, the birth of a packaging carton must be printed, stamped, glazing (UV glazing, water-based glazing, ink glazing, etc.), laminating (precoating film dry coating, ie, coating Wet coating, counter-boring, die-cutting indentation, folding gluing, and multiple processing steps. Faced with such a complicated processing process and so many choices, how to apply the hot stamping process reasonably to complement each other's various processing technologies is a profound knowledge, and it requires process designers to gradually explore each process operator. Collaborative solution. However, the hot stamping of aluminum foil is a relatively complicated processing technology and is affected and limited by the materials, equipment, and process conditions. Therefore, at present, the overall level of hot stamping in our country is not too high and there are many problems. Here we summarize some issues that need attention in hot stamping.
1. Reasonable Selection of Electro-Aluminum Selection Electro-aluminum must be carefully matched with the hot stamping substrate. For example, the commonly used electroplated aluminum Venus No. 400 imported from the United States is not suitable for hot stamping on the ink layer, while the type 338 electro-aluminum imported from Germany and the type 88 electro-aluminum produced by the Shanghai Hot Stamping Material Factory of China are both There is a good combination of fastness with the printing ink layer, and other domestic brands of aluminum also have models suitable for hot stamping on the ink layer. In addition to considering the color and price of galvanized aluminum, the user selects the galvanized aluminum, and the hot stamping of the substrate and its surface state (whether on the printing ink layer, the glazing surface or the surface of the lamination film) must be addressed to the supplier. Explained.
2. Determination of Hot Stamping Process Conditions Appropriate stamping pressure, hot stamping temperature and hot stamping time are three prerequisites for good stamping quality. Hot stamping temperature and hot stamping time can be coordinated within a certain range. For example, when the hot stamping temperature is slightly lower, it can be compensated by reducing the stamping time. When the hot stamping temperature is slightly higher, it can be matched by reducing the stamping time. At present, neither the materials used in hot stamping in China nor the hot stamping process are standardized. As there are no provisions in this area, there are many printing companies that are very random when processing. The strict management of the printing plant will, after a period of practice, find out a set of suitable process conditions for the factory: experienced stamping workers who have accumulated attention can also pass water by hand even without a temperature indicator. Quickly touch the plate to determine if the stamping temperature is appropriate. The adjustment of hot stamping pressure should be flexibly controlled according to the layout. Large areas of hot stamping require greater pressure, while fine text and lines require less pressure. When the same layout has both a large area of ​​hot stamping and a small text to be stamped, it is possible to perform partial pressure compensation by means of a pad to take into account both. If layout factors are not taken into consideration, the entire plate is stamped with the same pressure, which will inevitably result in a large area of ​​hot stamping with fine text stencils, or fine text stamping with clear and large areas of hot stamping.
3. Selection and Processing of Hot Stamping Plates The hot stamping plate is best made of red copper because red copper has better heat dissipation and heat transfer properties. It is a neutral material in metals and is neither too soft nor too hard. Easy to process, with a certain degree of elasticity, and high resistance to printing force, generally up to 50,000 impressions.
Many domestic printers are still using zinc or aluminum to make hot stamps because of the low cost of zinc processing. Some small printers do not even know that there is a red hot stamping version. In fact, for a hot stamping version, the processing cost of the zinc plate is lower, but the zinc plate is too soft. The resistance force is only 5,000 to 6,000 India. More than 8,000 India, the zinc plate will be seriously deformed. The packaging and printing is generally more than tens of thousands of India, if you use the zinc version, you need to prepare more than one version at the same time, the plate-making fee is not enough to save, but the loading version is a waste of a lot of time.
The thickness of the hot stamping plate is also exquisite, and the general hot stamping paper is suitable. The thickness of the hot stamping plate is preferably 1 to 1.5 mm.
Hot stamping before use, first check the corrosion degree, look at the genuine light not only, not only the place to use a fine sandpaper to play a dozen; version of the back of the sandpaper used to grind grooves, in order to facilitate the machine sticky. When sticking, a 150 g/m2 coated paper should be sandwiched between the hot stamping plate and the bottom plate of the hot stamping machine. Both sides of the coated paper must be sanded with sandpaper, so that the hot stamped version is both strong and easy to use.
4. Hot stamping equipment The hot stamping equipment currently used in China is varied. There are high-speed circular presses, flat presses and hot stamping machines with high automation level, modified round flat stamping machines, and semi-automatic and manual manual flat stamping hot stamping machines. Tiger mouth hot stamping machine applications are also more common.
For manual bronzing machines, experienced workers can match the tamper temperature with the stamping time. However, for the automatic hot stamping machine, since the temperature control of the hot stamping machine is controlled by the thermostat, the operating speed of the equipment is preset, and the operator can only know the hot stamping temperature state through the meter display on the device panel, and it is difficult to perform hot stamping at any time. Adjustment and matching of temperature and stamping time. However, many thermostats of hot stamping machines simply do not pass. After a period of time, the display temperature and the actual operating temperature will be very different. A printing factory in Beijing had burned a batch of live overnight. The temperature displayed on the hot stamping machine was 135°C, while the actual hot stamping temperature was only 90°C with a deviation of up to 45°C. If you blindly believe that the so-called high-tech, automation, is bound by it, how can you stamp out a good product? In this regard, we also remind everyone that if, in actual work, the automatic hot stamping temperature is set according to the temperature data provided by the stamping material supplier, the hot stamping is not secure, then the temperature of the hot stamping machine may be taken into consideration. The device deceives your eyes and you may wish to try increasing the stamping temperature bit by bit until the stamping results meet the requirements. (Lin Fang)
1. Reasonable Selection of Electro-Aluminum Selection Electro-aluminum must be carefully matched with the hot stamping substrate. For example, the commonly used electroplated aluminum Venus No. 400 imported from the United States is not suitable for hot stamping on the ink layer, while the type 338 electro-aluminum imported from Germany and the type 88 electro-aluminum produced by the Shanghai Hot Stamping Material Factory of China are both There is a good combination of fastness with the printing ink layer, and other domestic brands of aluminum also have models suitable for hot stamping on the ink layer. In addition to considering the color and price of galvanized aluminum, the user selects the galvanized aluminum, and the hot stamping of the substrate and its surface state (whether on the printing ink layer, the glazing surface or the surface of the lamination film) must be addressed to the supplier. Explained.
2. Determination of Hot Stamping Process Conditions Appropriate stamping pressure, hot stamping temperature and hot stamping time are three prerequisites for good stamping quality. Hot stamping temperature and hot stamping time can be coordinated within a certain range. For example, when the hot stamping temperature is slightly lower, it can be compensated by reducing the stamping time. When the hot stamping temperature is slightly higher, it can be matched by reducing the stamping time. At present, neither the materials used in hot stamping in China nor the hot stamping process are standardized. As there are no provisions in this area, there are many printing companies that are very random when processing. The strict management of the printing plant will, after a period of practice, find out a set of suitable process conditions for the factory: experienced stamping workers who have accumulated attention can also pass water by hand even without a temperature indicator. Quickly touch the plate to determine if the stamping temperature is appropriate. The adjustment of hot stamping pressure should be flexibly controlled according to the layout. Large areas of hot stamping require greater pressure, while fine text and lines require less pressure. When the same layout has both a large area of ​​hot stamping and a small text to be stamped, it is possible to perform partial pressure compensation by means of a pad to take into account both. If layout factors are not taken into consideration, the entire plate is stamped with the same pressure, which will inevitably result in a large area of ​​hot stamping with fine text stencils, or fine text stamping with clear and large areas of hot stamping.
3. Selection and Processing of Hot Stamping Plates The hot stamping plate is best made of red copper because red copper has better heat dissipation and heat transfer properties. It is a neutral material in metals and is neither too soft nor too hard. Easy to process, with a certain degree of elasticity, and high resistance to printing force, generally up to 50,000 impressions.
Many domestic printers are still using zinc or aluminum to make hot stamps because of the low cost of zinc processing. Some small printers do not even know that there is a red hot stamping version. In fact, for a hot stamping version, the processing cost of the zinc plate is lower, but the zinc plate is too soft. The resistance force is only 5,000 to 6,000 India. More than 8,000 India, the zinc plate will be seriously deformed. The packaging and printing is generally more than tens of thousands of India, if you use the zinc version, you need to prepare more than one version at the same time, the plate-making fee is not enough to save, but the loading version is a waste of a lot of time.
The thickness of the hot stamping plate is also exquisite, and the general hot stamping paper is suitable. The thickness of the hot stamping plate is preferably 1 to 1.5 mm.
Hot stamping before use, first check the corrosion degree, look at the genuine light not only, not only the place to use a fine sandpaper to play a dozen; version of the back of the sandpaper used to grind grooves, in order to facilitate the machine sticky. When sticking, a 150 g/m2 coated paper should be sandwiched between the hot stamping plate and the bottom plate of the hot stamping machine. Both sides of the coated paper must be sanded with sandpaper, so that the hot stamped version is both strong and easy to use.
4. Hot stamping equipment The hot stamping equipment currently used in China is varied. There are high-speed circular presses, flat presses and hot stamping machines with high automation level, modified round flat stamping machines, and semi-automatic and manual manual flat stamping hot stamping machines. Tiger mouth hot stamping machine applications are also more common.
For manual bronzing machines, experienced workers can match the tamper temperature with the stamping time. However, for the automatic hot stamping machine, since the temperature control of the hot stamping machine is controlled by the thermostat, the operating speed of the equipment is preset, and the operator can only know the hot stamping temperature state through the meter display on the device panel, and it is difficult to perform hot stamping at any time. Adjustment and matching of temperature and stamping time. However, many thermostats of hot stamping machines simply do not pass. After a period of time, the display temperature and the actual operating temperature will be very different. A printing factory in Beijing had burned a batch of live overnight. The temperature displayed on the hot stamping machine was 135°C, while the actual hot stamping temperature was only 90°C with a deviation of up to 45°C. If you blindly believe that the so-called high-tech, automation, is bound by it, how can you stamp out a good product? In this regard, we also remind everyone that if, in actual work, the automatic hot stamping temperature is set according to the temperature data provided by the stamping material supplier, the hot stamping is not secure, then the temperature of the hot stamping machine may be taken into consideration. The device deceives your eyes and you may wish to try increasing the stamping temperature bit by bit until the stamping results meet the requirements. (Lin Fang)
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