Three-dimensional bronzing technology and three-dimensional hot stamping features
The three-dimensional bronzing technology is quite different from ordinary bronzing. In addition to the three-dimensional pattern that can be formed into a relief shape, there are differences in plate making, temperature control and pressure control. Three-dimensional hot stamping
The three-dimensional bronzing technology is quite different from ordinary bronzing. In addition to the three-dimensional pattern that can be formed into a relief shape, there are differences in plate making, temperature control and pressure control.
The manufacturing principle of the three-dimensional hot stamping
plate is the same as that of the ordinary hot stamping
plate which is performed by the bronzing machine, but it is more complicated than the ordinary version because it has to form a three-dimensional relief pattern, and the hot stamping plate is generally concave and has a shallow level. The change is deeper than the ordinary hot stamping plate with a hot stamping machine, and the precision is higher. At present, the main method used in China is the copper plate photographic etching method. The advantage of this method is low cost and simple process, but it is only suitable for flat bronzing. Because of its poor stereoscopic effect, short service life and printing durability of only about 100,000 impressions, it is often used in some packagings that do not require high relief effect. On the product.
At present, the engraving brass version has been widely used in foreign countries. The scanner first scans the pattern to be stamped, stores the data into the computer, and then performs stereo engraving through the control of the computer and software to form a concave die with a rich three-dimensional pattern. Because it is controlled by a computer, it can form a very fine pattern, and it is more ideal for subtle parts. The printing durability can reach more than 1 million impressions, so it is very suitable for making three-dimensional hot stamping with high quality and large printing volume. Die intaglio. Of course, due to the need for high-end electronic engraving machines, scanners, computers and software, engineering and technical personnel, etc., the production cost is higher than the photographic corrosion method. It is precisely because of its complicated production and technical difficulty that it can better prevent the counterfeiting behavior of some unscrupulous manufacturers and have certain anti-counterfeiting functions. Therefore, for some long-term activities that require high-quality anti-counterfeiting functions, such as cigarette packets, wine bags, health care packaging and greeting cards, it is suitable for stereo hot stamping. In the past, this type of hot stamping machine required to be processed abroad, the cost is high, the delivery is not timely, and the design effect is also unsatisfactory. At present, a small number of manufacturers in China can process this hot stamping plate, which effectively reduces the cost, especially the direct communication between the processing manufacturer and the designer, can correctly understand the design intent, and thus obtain satisfactory results.
Three-dimensional bronzing is different from ordinary bronzing. The bottom plate of ordinary bronzing is flat with a bronzing machine. It does not need to be specially made, and the bottom plate of the three-dimensional bronzing must be a male formwork corresponding to the hot stamping plate, that is, the concave part of the hot stamping plate. It should be convex on the base plate, and the height of the protrusion corresponds to the depth of the hot stamping plate. The method of making the counter-embossing is the same as that of the embossing of the male embossing. The commonly used materials are gypsum and glass fiber. If gypsum is used, it must be finished on the machine, so the process is more complicated, and it is troublesome to replace the bottom plate, but the cost is lower, and it is more commonly used in China. If glass fiber is used, it can be pre-made according to the model of the bronzing plate, and the positioning hole can be made with the processed copper plate to facilitate the replacement of the positioning.