On the shaftless transmission technology of printing machine
From the perspective of users purchasing equipment, they are mainly concerned about the production speed, degree of automation, stability and scalability of newspaper printers. In addition, simple maintenance, low noise, and low waste rate are also the main considerations for users. Based on these, the shaftless newspaper presses introduced in the mid-1990s were accepted and adopted by most users. According to statistics, 70% of the purchase contracts signed by domestic newspapers in 2000 were shaftless newspaper printers. At present, 90% of the equipment produced by several major newspaper printing equipment manufacturers around the world uses shaftless technology.
The main shaftless technology is referred to as the shaftless transmission technology. Compared with the shafted transmission, it means that the power drive of each unit, even each drum or roller, is independent of each other. They are controlled by a separate motor according to the program. Drive to meet the requirements of specific operating speed, operating accuracy and printing process. This technology replaces the traditional mechanical shaft with an electronic shaft, so it is usually also called independent drive, vertical motor drive, no mechanical drive, electronic shaft drive, etc. The form of shaftless transmission is various, from the unit to the drum and the main transmission roller can be used shaftless transmission. Shaftless drive is based on a single drive, so it is sometimes called direct drive. It must meet the independent adjustable speed of the specific transmission mechanism (drum, roller), with a high balance (speed matching), which can improve the flexibility of production, the simplicity of the transmission system and the convenience of operation.
Compared with the shaft transmission, the advantages of the shaftless transmission are mainly manifested in the following aspects.
1. The transmission is accurate, the mechanical wear, playground and mechanical vibration are small, which eliminates the maintenance work of each transmission component in the shaft transmission, which is conducive to the improvement of printing quality and reduces the scrap rate.
2. It is convenient to realize the computer console control and remote control of the printing press.
3. The unit configuration is flexible, which improves the utilization rate of equipment and increases the flexibility of production. It is especially suitable for flexible and short-form live printing.
4. Each part can be prepared and adjusted separately, which saves production preparation time and installation and adjustment time, and saves precious time for ensuring publishing.
5. In the production process, the fault maintenance of any unit will not affect the normal production of other units, ensuring the continuity of printing and the stability of quality.
However, the shaftless transmission technology is not perfect, and it requires a large investment. The increase in the control equipment of the allies and the increase in the complexity of the system put forward higher requirements for the skills and experience of equipment manufacturing, maintenance personnel and operators. On the basis of mastering the traditional printing process, the operator must also have a certain electronic technology and English foundation, so that this new technology can play a greater role.
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