Application of the most popular electronic shaft d

2022-09-19
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The application of electronic shaft drive narrow width rotary flexo printing machine in soft bags

electronic shaft drive narrow width rotary flexo printing machine is more used in soft bag products. For all kinds of domestic milk, 7.2 elongation at break or yield elongation is more than ε T (%) indicates that products such as bags, beverage bags, in mold labels and heat shrinkable mold sleeve labels can provide better solutions. Electric shaft transmission technology, that is, electronic shaft technology, began to be used in the industrial field as early as 1994

for unit type narrow width flexographic printing, at the international label exhibition held in Belgium in 2002, the company introduced Varyflex model for the first time, which is the first truly gearless flexographic printing machine in the field of narrow width wheel transfer brush. Compared with the traditional mechanical long shaft, the function of the mechanical long shaft in the printing machine is to drive and synchronize. The electronic shaft transmission uses the independent drive servo motor as the driving component, and adopts the encoder and phase control technology to achieve the synchronization of the whole equipment through the transmission of electronic signals

on the Varyflex model of omit company, the imprint cylinder and the plate cylinder are independently driven by a brushless motor. This drive is directly driven by the motor, and there is no reduction gear train in the middle, which solves the gear bar problem that has plagued the flexographic printing industry for many years. The traditional narrow width flexographic press prints through a pair of gears on the plate cylinder and the impression cylinder. When the thickness of the substrate is too thin or too thick, the mutual meshing of the two gears is not on the pitch circle, and the gear transmission is prone to shake and wear, which is difficult to ensure high-precision and high-quality printing effect. The electronic shaft model breaks through this mechanical limitation. Both the plate cylinder and the imprint cylinder are directly driven by the motor, avoiding the limitation of the gear meshing position

another remarkable feature of electronic shaft transmission technology is that it effectively solves the demand of stepless change of printing repetition length. Using the sleeve technology driven by an independent motor, the printing repetition length can be adjusted steplessly. The core of electronic axis technology lies in high-precision dynamic control, high-speed and high-precision signal acquisition and fast response driving components. The encoder storing 8million positions and the MKD numerical control AC motor of Bole company are used on the embossing and plate cylinder of omite, which also comes from the correct development direction we have formulated. The built-in hardware of the motor directly processes the signal of the encoder and adjusts the output of the motor. The reaction speed is extremely fast

fast response means more accurate control, that is, higher accuracy, which greatly improves the overprint accuracy and reduces the scrap rate. Tension control is the basis of overprint accuracy. When it comes to overprint, it is inevitable to talk about tension control. The application of electronic shaft technology has made the level of tension control a big step forward. Taking the Varyflex model of omite company as an example, the process of adjusting the planetary gear position by the motor to change the output angular speed of the gearbox is cancelled, and the NC servo motor directly drives the tension control roll. The built-in control hardware of the motor further improves the reaction speed of tension adjustment

through the high-precision dynamic control of the printing process and tension, the electronic axis technology has greatly reduced the scrap rate and reduced the waste of materials. The 2016 annual report of electric shows that the sub axis technology has greatly increased the proportion of electronic control in the equipment. When the Varyflex model of omite company is preparing for a new job, the mechanical pre registration is automatically carried out before the equipment is started, so that the reference point of the printing plate sleeve automatically returns to zero. After the equipment is started, it runs at a low speed, such as 10m/min. when the cursor on the substrate is detected by the printing unit sensor, the servo motor that controls the printing plate cylinder immediately turns the plate cylinder to the position corresponding to the cursor of the substrate to complete accurate electronic pre registration

after the electronic pre registration is completed, the ultra-high temperature material printing has achieved accurate alignment, which can directly speed up the printing. Automatic pre registration greatly reduces the waste of materials during overprint adjustment, so that one paper path can complete the overprint of the whole live parts. The electronic shaft technology enables the electrical control part and power transmission part of the equipment to realize the real die-cutting design. Because each structure eliminates the physical mechanical linkage, it is equipped with an independent power device, so that the equipment configuration can achieve the maximum flexibility. For example, gravure printing unit, silk screen printing unit, cold pressing unit and holographic positioning bronzing unit can be added at any position on the flexographic press, which expands the flexibility of multi process combination of the equipment

taking gravure unit as an example, many traditional mechanical transmission flexographic machine manufacturers are trying to insert gravure unit at any position. Because the long shaft is deformed in the direction of rotation, and its deformation is different in different positions, the traditional long shaft transmission method is difficult to ensure the synchronization of power at any position. On the electronic shaft model, the control system and the motor directly control the phase, which is not limited by the torque of the mechanical long shaft, and can flexibly exchange any position. For the packaging industry, in order to combine the characteristics of stable quality, thick ink color and high saturation of gravure printing with the high flexibility of flexographic printing, such a configuration has been made on the ometer electronic axis model: the first to sixth colors adopt gravure printing unit, the seventh color group is silk screen printing unit, and the eighth to ninth colors are flexographic printing unit. Among them, silk screen printing unit, cold pressing and holographic positioning pressing unit can be configured at any position of the equipment, At the same time, the printing production line can provide online composite function and online holographic transfer function, which is of special significance to soft packaging and high-end paper packaging such as cigarette packs

electronic axis technology opens a door, making the following features possible: higher printing and die-cutting accuracy, less material waste, more operation preparation time, wider printing range (12 u-0.6mm), maximum configuration flexibility and function expansion ability of the equipment (not only printing, but also online composite and online holographic transfer). In the Chinese market, the electronic shaft driven narrow width flexographic printing machine first entered the cigarette bag industry with complex technology. From the sales and installation of ometer flexographic printing machine in foreign countries, many of them are used for various soft packaging products. For domestic Tetra Pak, various milk bags, beverage bags, in mold standards, heat shrinkable mold sleeve standards and other packaging products, electronic shaft driven narrow width flexographic printing provides a better solution

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