1 Introduction Fast development in science and technology these days, men and women packaging to meet diversified requirements of exquisite technologies, the automation of packaging printing transmission needs, place tracking accuracy specifications are higher. To microelectronics, information processing technologies, new sensor technology, laser technologies and new processes and new supplies used in printing machinery, intelligent, hugely automated, higher-performance technologies is the development of modern day printing machinery.
2, packaging and printing machinery Status
Our packaging and printing machinery, particularly gravure production line late start, weak foundation. According to statistics, about 300 of our current Packets Gravure printing production lines, practically all from Europe, the United States. Japanese imports of industrial countries or Australia. Most of them introduced in the 90s of last century, the basic use of the technology eighties and nineties, and some even the sixties and seventies the technology, the equipment has the following functions.
(1) handle circuit devices generally use a programmable logic controller (PLC) or pc control, in terms of this point. Or more sophisticated.
(2) the common use of DC gear motor, some of the sixties and seventies of the equipment utilized or slip speed manage motor. DC main transmission speed by a host (or a communication speed host) drive a mechanical axis, then the mechanical axis by way of the root of the colorful group of die-cutting unit and the unit together, synchronous rotation. This mechanical structure via shaft until the internet gravure press is still extensively utilised type of transmission.
(3) registering devices typically use the stepper motor with reducer institutions (including differential, CVT, and so on.).
(4) tension handle devices also normally use stepper motors with gear box body.
Recent years, electronic technologies and microelectronics technology forward at an alarming price, with the attendant also led to the AC drive technologies. Contemporary AC drive technologies has undergone 20 years, is emerging as a mainstream electric drive, DC drive has been occupied by several in the field has been occupied by the AC drive.
3, mechanical ventilation shaft structure of the shortcomings
Six-colour gravure printing machine web packets can be printed on a web? six colors. As the net gravure speed, level of representation rich texture is good, and have been extensively utilized. But its high precision machinery. Especially given that Paper Vulnerable to the effects of deformation temperature and humidity, stretching, even if the overlay had been very precise adjusting mechanism, coordination of the a variety of parts of action and very precise, but if not higher degree of automation is nonetheless difficult to avoid overprinting inaccurate and can not assure item quality. Most web gravure printing gear, general domestic use of mechanical ventilation shaft structure, want to be overprinted by artificial pre-location, complicated operation, position error big, dynamic adjustment slow. Pre-position gear are not permitted to lead to a very long operating time with paper, resulting in significantly waste.
four, the positive aspects of AC servo drive
To address these issues, Europe and the United States and other countries some of the advanced printing press companies have taken advantage of the current AC servo drive technology created e-net gravure press no shaft. There axis (standard mechanical axis) compared to drive gravure press, the electronic machine canceled with no axis internet gravure printing unit mechanical hyperlinks in between the shaft structure, each and every printing unit are independent with AC vector inverter motor drives by plate cylinder direct drive motor, and adjust the plate cylinder phase to obtain the vertical register, the very same time by a stepper motor to drive the plate cylinder of lateral movement in order to achieve horizontal register. This design and style brings several substantial advantages.
(1) saved a lot of mechanical transmission hyperlink, due to mechanical put on and minimize the possibility of overlay accuracy down to a minimum, to enhance reliability. Reduces upkeep charges.