Introduction of Heidelberg printing machine
Heidelberg printing press has a long history in China, so the influence of second-hand Heidelberg printing press is relatively large, and its sales volume is also large in China. In the mid-1990s, Heidelberg changed the traditional rotary paper delivery mechanism used by the second-hand printing machine, the second-hand Heidelberg folio and the second-hand printing machine, the second-hand Heidelberg four power on and above, into the bottom type paper delivery mechanism
Almost everyone who is engaged in the printing industry knows the second-hand printing machines of these six brands: the second-hand Heidelberg printing machine, the second-hand Roland printing machine, the second-hand gaobao printing machine, the second-hand Mitsubishi printing machine, the second-hand Komori printing machine, the second-hand Qiushan printing machine, etc. Of course, there are other brands of second-hand printing machines such as Shinohara, Sakurai and other Chinese printing machines. Due to the limited space, this paper only discusses the first six brands of printing machines. It is also a big second-hand printing machine in China. In the mid-1990s, the second-hand Heidelberg changed the traditional rotary paper delivery mechanism used in its split and four start-up into a downward swinging paper delivery mechanism, with a machine speed of more than 15000 rpm. Compared with other machines, Heidelberg's downward swinging paper delivery mechanism is a conjugate cam mechanism (relatively simple compared with other mechanisms) which adopts the form of cam swing bar directly. The opening and closing teeth mechanism adopts the structure of cam pushing fork. Both of these structures are unique.
Another special feature is that the traditional roller in the middle adopts a three times diameter structure, which increases the distance between the units and the operation space. It is much more difficult to process the triple diameter drum than the double diameter drum, so it is more difficult to install and debug. The new H105 has changed its triple diameter roller to double diameter roller, and the speed of the machine can reach 18000 RPM (H105 is a wide format printing equipment introduced by Heidelberg, which has a greater advantage compared with h102, and has a strong ability to adapt to printing parts, especially suitable for packaging and printing. Its paper conveying part adopts a unique blower type, which can keep good performance according to different substrate Transmission characteristics). From the general trend, at present, double diameter structure is widely used in the paper transfer drum. The second-hand Heidelberg off platform press machine always adopts the structure of three-point suspension, which can play a role of safety protection, but the sound of off platform press is loud when it works at high speed.
The pm52 launched by Heidelberg in recent two years is a product between GTO52 and sm52. The automation level of this product is between the two, but the price is moderate. Second hand Heidelberg's Feida structure is relatively simple. Although it has been improved in the past two years, the adaptability of its tissue paper is slightly weaker overall. The new model of Heidelberg sm52 can be equipped with roller die-cutting device, which integrates printing and die-cutting and greatly improves printing efficiency. At present, CP2000 is a representative work of Heidelberg, which is characterized by convenient operation. Two people can complete the operation, which improves efficiency and reduces cost. It uses a pull gauge, a push gauge, one for thin paper, one for thick paper, so its printing adaptability is also wide. Another representative product of the second-hand Heidelberg printing machine is double-sided printing. The printing equipment with this structure has a variety of sets (L + 10 + 2, L + 40 + 5, 4 + 4), which provides convenience for users to choose. One printing can complete double-sided monochrome or multi-color printing. But at present, the problem that this kind of product faces in the domestic market is that the maintenance of its turnover part is more troublesome. Theoretically speaking, the current structure also needs further improvement and improvement in technology.
