The rapid development of the packaging industry, the introduction of a large number of gravure printing equipment and flexo printing equipment, require a substantial advance in the level of die-cutting technology. In terms of hardware, the level of die-cutting technology mainly depends on two aspects: first, the quality of the die-cutting machine, and second, the production of the template. As far as the current situation is concerned, the market for die-cutting machines ranges from high-quality international brands to more cost-effective domestic brands.
From a device perspective, die-cutting capabilities are already strong and have been scaled. However, on the whole, the die-cut version of the processing technology has not improved. At present, China's die-cut version of the processing are mainly the following situations:
1, because the plate is used wood, so the processing accuracy is poor, flatness is low, can only change the knife three times, die-cut version of the short life, not suitable for long version of the printed product line die cutting.
2. In the important process of opening and grooving, manual cutting is the main method, and only a small amount of advanced laser cutting technology is used. However, it is difficult to ensure the linear accuracy of the sipe and the accuracy in the width and depth directions by manual operation, and the repeat accuracy is also poor. In terms of laser cutting, laser cutting machines for cutting flutes in the country are mostly refitted from industrial laser cutting machines. In many aspects, they cannot meet the requirements for template production, such as low laser frequency, poor light converging property, and large concentration angle. This will have an impact on the quality of the template: sipes will produce a difference in the upper and lower width, Tibetan knife loose and so on. Reduces the service life of the die cut, but also affects the accuracy of die cutting.
3. The processing technology of knife and strip mainly depends on handwork, the degree of mechanization is extremely low, the processing cycle is long, and the product quality is unstable.
4, the use of gypsum processing technology from the convex plate processing, poor accuracy, short life, registration is difficult.
Due to the rapid development of laser and computer technology in recent years, the processing technology and technical level of foreign die-cutting plates have been greatly developed. Specifically in:
1. Computerization of design In foreign countries, some large die-cut processing companies use computers in the entire process of product creation, design, modification, simulation, and production, and are networked with back-end processes, greatly shortening the cycle and accelerating the production schedule.
2, cutting laser unless the plate is a synthetic material such as glass fiber, it will open the knife slot with a high-pressure water jet; for wood, steel plate and other general plate, laser cutting method is generally used. This not only gives the die-cut version a stable and lasting high quality, but also has a long life and high repeatability.
3, processing machinery automation, complete sets, specialization At present, the domestic die-cut version of the processing has "more than one less" - the manual processing of many components, single work more, less professional characteristics. In contrast, the foreign die-cut version of the processing technology reflects its advanced nature in terms of its mechanical automation, complete sets, and specialization.
4, the product of multi-level die-cutting and printing are also the same as the long version and short version, so the life of the die-cut version has different requirements. In general, the quality of the cutting blade used for die-cutting and creasing can be controlled stably. Therefore, the number of times the die-cutting plate can replace the cutting blade becomes the main factor that determines its life. The number of tool change times for multi-layer compressed wood, glass fiber and composite steel plates was: compressed wood plate 3 times; glass fiber plate 6 times; and composite steel plate 12 times or more. The structure of the composite steel plate is a steel plate above and below, and a synthetic plastic filler in the middle, which has a long life and high precision, and is particularly suitable for the long and special long version of the cigarette box, food packaging and die-cutting.
Domestic and foreign die-cutting production
January 30 03:04:43, 2019
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