First, the bottom mold (backing)CAM system
When using computer-aided engraving machine to process backing, indentation groove width, cutting depth and precision should meet the requirements, and engraving speed and depth should be adjustable. The application of CAM technology can not only shorten the production cycle, but also improve the manufacturing accuracy of the carton.
Two, box proofing
In order to verify the rationality of the carton structure design, before the formal mass production, the use of multifunctional carton sample CAM equipment to try to produce a certain amount of carton samples, after consulting users and consumers, and then modify or redesign, to avoid the mass production of carton structure design, manufacturing unreasonable phenomenon; You can also check if the design meets the user's requirements. The multi-function carton sample CAM system is equipped with a combined cutter and press cutter. When the control part receives the execution instruction, the execution part automatically selects the indentation and cutting tool according to its cardboard type, and automatically draws, indents and cuts according to the structural data and program of computer-aided design, and can realize automatic tool change. The MARPL0T multifunctional carton sample CAM system developed by MARBACH has a maximum processing size of 1 020 mln×1 420 mln and a maximum speed of 40 m/min. Barco Graphics launched Kongsberg XXL40 series die cutting machine, mainly for corrugated and folding carton sample production and short version production, performance can be increased by 2596. The front end of the machine is equipped with a Pc, the system adjustment adopts barcode technology, and the error can be corrected automatically.
Three, carton direct production technology
The Boardeat er folding carton laser processing system launched by German M A R B A C H company is known as a revolution in folding lift-up flaps book wholesale in Europe. The device applies C0. The laser beam directly processes the folding indentation line and cutting edge of the carton on the cardboard, with high speed and high precision. It can process cardboard with a weight of less than 1 500 g/m2 and cardboard with a corrugated thickness of B to 3 layers. Using this system to process a batch of cartons, the production cycle can be greatly shortened. Processing small and medium-sized batches of standard cartons can also greatly reduce processing costs.
Four, die cutting processing technology
1, flat pressing die cutting
Sheet flat die cutting relies on the mechanical positioning of the front gauge and side gauge, while line flat die cutting relies on the positioning of the printed mark, and there is no paper teeth. In order to realize the transformation of the continuous transfer of paper from the rotary printing unit to the intermittent motion of the die cutting station, an adjustable eccentric mechanism is usually set up in the paper feeding device. BOBST's in-line flat die cutter uses an aligning unit and measuring roll to ensure reliable paper feed. Die-cutting printing register and quality control system are adopted to avoid the instability of mechanical backlash. And can automatically remove web joints and waste products.
2, round die cutting
① Die cutting mode
The upper roll of the die-cutting roll is the knife roll, and the lower roll is the smooth roll. Main features: low manufacturing cost, convenient installation of the cutter roll, easy adjustment of the cutter roll, but the knife edge is not as smooth as the shear type, and the service life of the die-cutting tool is shorter. The die-cutting roller has two kinds: integral type and full plug type. At present, most of the gravure production lines used in China use full plug die-cutting rollers, and the die-cutting rollers of various cigarette boxes, wine boxes, food packaging boxes and self-adhesive trademarks are basically used as whole die-cutting rollers.
The upper and lower rollers of the shear die cutting roller are knife rollers, which use the principle of scissors to achieve die cutting. Main features: Because the shear die cutting roller avoids the direct contact between metal and metal, prolongs the service life of the die cutting roller (about 3 to 5 times that of the press die cutting roller), the die cutting roller can be adjusted, the incision is smooth, the die cutting quality is high, but the manufacturing cost is high. Most of the roller body structure of the shear die cutting roller is integral, and only when some patterns need to be replaced, the embossing and easy to wear parts, the internal cutting edge and the processing of special patterns, the combination plug die cutting roller is selected. Shearing die cutting roller is mainly used in the production of cigarette boxes, beverage packaging boxes, medicine packaging boxes, fast food boxes and other products.
② On-line circular die cutting production line
The main feature of the on-line circular die cutting production line is to carry out a series of operations such as hot stamping, die cutting and waste cleaning on the printed web board, so as to process the printed sheet into the final product at one time. It avoids a series of quality problems caused by surface fouling, improper positioning of ordinary stamping and holographic stamping, and high scrap rate caused by multi-channel post-printing processing such as 1 18 sheets of cutting sheets, ordinary stamping and holographic stamping necessary for the old process in the past, and reduces equipment investment and floor space, saves a lot of operators, and reduces the production cycle. Due to the continuous improvement of the performance of hot stamping materials and the development and application of high-quality new materials, the current maximum speed of web rotary die-cutting and hot stamping linkage production equipment has reached 180 m/min.
Because circular stamping and die cutting are line contact, the line pressure is much smaller than the contact pressure of the flat surface, so the equipment power is small, and the smoothness is obviously better than the flat die cutting. Because it is continuous rolling die-cutting, high production efficiency, the maximum die-cutting speed of the rotary die-cutting unit in the foreign web printing production line can reach 300~350 m/min. The speed of die cutting is greatly affected by the intermittent motion of die cutting. The rotary die cutting machine is equipped with high precision register device and die cutting phase adjustment device, which can obtain quite high die cutting precision.
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