HG452 II Four color offset printing machine
· Heavy duty mechanism, external bevel gear transmission, three point suspension structure for rubber cylinder, printing, cylinder and blanket cylinder adopting the bearer, central oil supplying system, special feeder and paper feeding plate for heavy duty press, paper skew adjustment(Special technique).
· Offset machine structural own design of great size, offers major safety, stability and facility of managing.
· Gear helocoidal of high precision, aeronautical quality, assures firm rotation, under level of noise, its test of collision and graze, eliminates damage of striping for gearing. In addition the external gearing train facilitates the oiling and the maintenance of the machine, assuring precision and long useful life.
· Pneumatic System of printing, replaces the former system of electromagnet. The printing receives a flexible treatment, which improves the functioning of the machine and constitutes a technical advance of machines offset manufacture for the modern printing.
The feature of super thick overall cast iron walling and staunch cast iron foundation as well as the typical offset printer structure ensure the high-speed operation stability, high precision, long life and enough printing pressure. Additionally, the vibration-free running of the dampening and inking rollers and the roller bearings ensure the long smooth running and constant printing quality to the press.
The rubber cylinder adopts the large-scale offset printer,s usual impression technology-three-point suspension technology with accurate and reliable pressure adjustment. The cylinders are adjusted independently without interference to each other, protecting the roller bearings.
The outside high precision gear drive and cylinder bearer are adopted to ensure the steady printing pressure transmission and stable rolling of the roller as well as the large area of field printing, clear screen dot duplicating and petty characters printing.
The overall machine is supplied with the oil in an collective way so that all the gears and bearings are lubricated from time to time when starting up or in operation (single-color press adopts manual pump).
The whole inking unit is composed of 15 inking rollers, including 4 plate rollers of different diameters, featuring quick system response and excellent ink distribution. The ink fountains are zone controlled by ink fountain key and the individual adjustment is also available and not interfered with each other. In this way, it guarantees enough ink reserve and uniform ink supply.
Adopt big machines special feeder and paper feeding plate, including elaborate two suction
nozzle pick-delivery-type sheet feeding unit and conventional uploading brush, and sheet pressing roll belt friction-type paper feeding plate. The roller wheel type side drawing guide sheet transfer unit adopts standard upward swing sheet transfer unit, and the holding tooth will close up at the cam,s high point, thus the sheet transfer is stable and accurate.
The quick plate clamps with the locating pins on the plate cylinder is convenient for the quick loading and unloading of the printing plate. Remote controlled adjustment device can adjust the printing plate in the circumferential, axial or diagonally direction without stopping the press.
The axially adjusting allowance is 1.5mm, circumferentially adjusting allowance 0.67mm, and bevel adjusting allowance 0.45mm. Particularly, the registration adjustment in diagonal direction is HGPM's own proprietary technology.
For the half high pile delivery, the number of the gripper bars is increased from 2 to 5 and the extended delivery distance is in favor of the thorough drying of the printings.
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