Founded in 1998, Shanghai Bernel Yahua Printing & Packaging Machinery Co., Ltd. is a joint venture between Shanghai Yahua Printing Machinery Co., Ltd., Shanghai Mechanical & Electrical Industry Co., Ltd. and American Bernier Technology Co., Ltd. , Maintenance of circular pressure die-cutting roller and connecting, off-line die-cutting equipment professional manufacturers.

Shanghai Bernell Yahua Co., Ltd. introduced the advanced rolling die-cutting technology, processing equipment and management of Bernier Corporation of the United States, relying on the largest and highest-level hot stamping die-cutting and post-press equipment manufacturer in Shanghai. China Printing Machinery Co., Ltd. is a manufacturing base that fully utilizes computer-aided design and processing. It specializes in the production of various round-pressing (press-cut, shear-type, block-type) die-cutting rollers, embossing rollers, and hot stamping rollers. Circular die-cutting machine (unwinding device, rewinding device, off-machine rejecting device, registering device) and reel material connection line or line external pressure round (flat pressing) die cutting production line. The products are mainly applicable to the printing and packaging industry (beverage and milk packaging boxes, tobacco packaging), medicine and daily necessities industries, food industry, car battery industry, computer manufacturing, disposable food industry and aviation industry.

The market is accelerating the development of circular die cutting

In recent years, as the people’s spending power has increased exponentially, everyone’s attention to the appearance of goods and the quality of their decoration has become more and more important. This has led to the rapid development and improvement of printing technology and the post-press die-cutting technology. With the continuous expansion of the application of gravure printing presses and flexographic printing presses, the printing of webs and the in-line and out-of-line die-cutting molding processes have also come into being. This has brought higher added value to prints.

Die-cutting process is divided into punching-cutting process, flat-pressing process, web-line flattening connection of web, web-in-line of web, and line-to-line circular connection. Among them, flat die cutting due to die cutting (indentation) knife line at the same plane height in the die-cutting work pressure, the stability and performance requirements of the machine is relatively high; and because all the knife line is difficult to complete The same plane, resulting in the knife line with the following die-cutting steel contact, affecting the service life of the knife; again, due to the working principle of the machine up and down reciprocating, making the actual work efficiency is only 50%. For example, in the 1050 series die-cutting machine, even if the hourly speed reaches 7,000 sheets, the actual length of paper per hour is about 5250 meters, so the total production efficiency is not high. However, flat die-cutting die cutting also has its own advantages. It is more suitable for single-shot production and small-batch production. The one-time investment is small, the cutter bar is easy to purchase and replace, and the use effect is easy to adjust.

The round press wire connection technology is a type of die cutting technology that has been developed in recent years and is suitable for relatively long fixed orders and requires high die cutting accuracy. It was first applied on gravure printing presses and has now been applied to flexographic printing presses. This technology makes use of special precision forming round-roller molds, which can enable the printing factory to directly obtain the indentation, embossing and die-cutting processes after printing, which greatly shortens the production cycle and ensures the quality of the products. Improve the overall economic benefits of the company.

Circular die cutting in promoting production

Circular die-cutting can be divided into two types: pressure-cutting and shearing. The upper roll of the die-cut die-cut roll is a knife roll and the lower roll is a light roll. It uses the principle of cutting boards to achieve die cutting. Press-cut type generally has a clearance between 0.00 and 0.005 between the roll knife line and the lower anvil roll. If the size is larger, there may be blocking in the die-cut, so that the upper and lower knife rolls are easily caused by the impact of the paper rebound force in the die-cutting process. Metal collision and contact. In addition, from the cross section, the upper roll edge is a triangle, the angle is generally 40 degrees, and the width of the cutting edge is generally only 0.02-0.04 millimeters. Therefore, the mechanical strength is relatively weak, and a slight discomfort can cause edge chipping. When the width of the knife edge is greater than 0.04 - 0.05 mm, the effect of die cutting is significantly reduced, so the period of repairing the knife edge is relatively short. Although the pressure-cutting mold only needs to make the upper roll, the material and hardness of the cutting tool are required to be relatively high, and the manufacturing difficulty is relatively large. Especially, the heat treatment process cannot solve the requirement of the large-diameter overall roll, and therefore the block type is usually adopted. Die, manufacturing cost and cycle have no obvious advantage. Relatively speaking, the adjustment of the pressure roller is easier than the shear tool, but it must meet the adjustment requirements.

Press-cutting die-cutting rollers can be divided into an integral die-cutting roller and a full-block die-cutting roller according to the structure of the roller. At present, most domestic gravure printers die-cutting users use full-block die-cutting die-cutting rollers. The overall pressure-cutting die-cutting roller is used more in the production of flexo presses. The die-cutting die-cutting roller is mainly suitable for the production of various kinds of cigarette labels, wine labels, food packaging boxes, sanitary napkins, diapers, wound dressings, self-adhesive labels and other products. The pressure-cutting die-cutting roller has also been used in certain applications in China. In early 1999, Shanghai Bernell Yahua was designed and manufactured by Shandong Tobacco Industry Co., Ltd., which is a full-block die-cutting die-cutting roll. It was installed and successfully applied on a Komori Shangbang seven-color gravure printing press of the company in June of the same year. The operating conditions are still good and the service life has exceeded 10 million rpm.

The upper and lower rollers of the shearing die-cutting roller are all knife rollers, which are die-cutting using the principle of scissors. Shear die cutting is a kind of die-cutting method which is developed by American Bernier company and enjoys international technology patent. Its working principle is similar to a pair of scissors, through the two opposite knife edges of the upper and lower rollers, to realize the die cutting effect of the paper. When used, the clearance between the upper roll and the lower roll must be adjusted to 0.02-0.03mm, and the actual gap between the knife-edge levels is adjusted according to the die-cutting effect, which is generally 0.005 - 0.010, even if it occurs during the die-cutting process. The rebound and impact of the paper also greatly reduces the metal impact and contact of the upper and lower knife rolls. From the cross-section of the tool, we can see that since the die cutting only uses one side of the knife edge, the width of the knife back can be increased as much as possible, thereby multiplying the mechanical strength of the knife edge, and as long as it is used reasonably, the knife bite will rarely occur. Blade phenomenon. Because the cutting edge adopts the "same side" principle of the knife edge in the design and the design of the bearing seat guarantees, even if the cutting edge of the cutting tool is slightly worn out, the cutting of the new cutting tool can be guaranteed only through reasonable adjustment and debugging. The effect increases the service life of the tool once. Although the upper and lower two rollers must be manufactured when the shearing tool is manufactured, due to the superiority of the tool design, the roller of the cutting tool can be made integral.

The shear die-cutting roller not only avoids the direct contact between the metal and the metal, but also prevents the blade from being damaged when the paper cracks. As a result, the service life of the die cutting roll is greatly extended. Since the shearing die-cutting roller knife line must follow the same measuring principle, when the cutting line is designed, there will inevitably be the occurrence of a pressure-cutting cutting line, so that in some areas of the paper, a die cutting different from the cutting blade line will be produced. effect. Most of the roller body structure of the shear die cutting roller is monolithic, and only the combination plug type die cutting roller is used in some replaceable patterns, concave and convex, easy to wear parts and special patterns. Shear die cutting roller is mainly used in the production of liquid packaging boxes, cigarette labels, ordinary folding cartons, disposable paper cups, pharmaceutical packaging boxes, fast food boxes, highway magnetic recording tickets, transparent films for speech and other products.

At present, many companies in China have used sheared die-cutting rollers to realize value-added services for users. A set of shear-type die-cutting rollers manufactured for Sichuan Wuniu Printing Co., Ltd. was applied to the company's BOBOST six-color gravure printing machine in December 1999. The machine speed was 200 meters per minute. With a life expectancy of nearly 10 million rpm, it has played a positive role in promoting the company's development. It has also made the company the first domestic manufacturer to use a shear die-cutting roll on BOBST gravure printing machines.

Unique cigarette pack processing configuration for user revenue generation

Over the years, Shanghai Bernell Yahua has been serving the industry with high-quality, fast service and lower prices than similar foreign products by 30% - 40%, and equipment has provided necessary support for the sustainable development of users. At the same time, after years of development and hard work, it has become the only one in the world and the only one in China that can both produce shear-type die-cutting rolls and can produce fully-blocked die-cutting die-cutting rolls.

For the round press round cigarette bag die-cutting process, Shanghai Bernell Yahua can provide users with multiple series of production lines with 650, 820, 920, and 1300 sizes, and create different benefits for different users. Among them, high-end die-cutting production lines, such as the full set of American BERNAL technology 2 - 3 group die-cutting production lines, including corrective devices, register devices, 2 - 3 sets of die-cutting (indentation, embossing) units and conveying units and stacking machines , Die-cutting, embossing, indentation, stacking, and stepless cutting, etc. can be completed. The unwinding device can be used to form an off-line die-cutting production line. It is controlled by the German shaft-less transmission technology, and it can be realized with printing machines. The machine is rigid and seamlessly connected with a simple delivery device; all electrical components and main standard components used on the production line are imported. Mid-range die-cutting production line, including unwinding device, correcting device, register device, 3 sets of die-cutting (indentation, embossing) units and conveying unit, can complete die-cutting, embossing, creasing, paper delivery and cutting Large sheets, etc., plus unwinding device can be used to form an off-line die-cutting production line; the connection with the printing press adopts a shaft-driven mechanical rigid connection, and a simple delivery device (non-automatic stacker); the main electrical components used on the production line Both imported parts and joint venture brands are used for the main standard parts. Economical die-cutting production line includes unwinding device, correcting device, register device and 2 - 3 sets of die-cutting (indentation, embossing) units and conveying units.

It is reported that nearly 100 domestic and foreign customers currently use the production line and various types of die-cutting rollers of Bernell Yahua, such as Shanghai Tobacco Printing, Shanghai Lifeng Textile Printing, Shanghai Zidan Printing, Shanghai Aviation Printing, Shanghai Renhe Printing Factory, Shandong Tobacco Printing, Shandong Quanlin Paper, Yunnan Hongta Printing, Yunnan Lima Dun Packaging, Qingdao Lima Dun Packaging, Sichuan Wuniu Printing Service, Kimberly China Group, Kimberly-Clark Daily Commodities, US Willon Company, Japan Intaglio Corporation and many other leading companies in the industry.

In the increasingly fierce market competition, technological innovation and technological innovation are the driving forces for the development of enterprises. Bernell YAWA will continue to introduce and absorb foreign advanced circular die-cutting technology to develop and improve China's own round-bore die-cutting technology. It has planned to introduce a full set of foreign-made in-line and out-of-line circular die-cutting production lines in order to ease the difficulties of domestic customers who currently purchase wire-cutting and die-cutting lines abroad, which requires a lot of foreign investment and time. To open up a new tomorrow for the round die-cutting market in China.

Source of information: pack.cn