T series Metal Plate off-set Presss

二、Main Specification

三、Structure& performance

1、Modularization Design
Seperated feeding machine can be connected to metal plate off-set press as well as coating and varnish machine. Each printing unit has its own individual driving system which can be operated solely or collectively.
It can be combined to single color, double color and multi-color freely because of their character of self-existing.

2、None-shaft Transmission
Double color metal plate off-set press adopts none shaft transmission, each printing unit drived by the motor (15kw), the power of feeder is supplied through shaft by the first-color printing unit. All printing units controled synchronously via electronic cam controller. Therefore, each printing unit can be operated separately before working. Also multi-person operation is available so the reduce the assistant producing time greatly and increase working efficiency. Once the machine begin to work, electronic cam controller and computer response rapidly. All printing units reach synchronization soon and begin to print.

3、Pneumatic Clutch Technology
Pressing cylinder, blanket cylinder, ink form roller, water form roller, ink transmission roller, water transmission roller , double sheet contol device, discharge device, smear-romving device etc all are all operated by pneumatic clutches featuring compact structure and easy operation.

4、Water Fountain and Ink Duct Roller
Water fountain and ink duct rollers are controlled seperately by two separated motors. The speed of these two motors and printing is synchronized track proportionally via computer programm. The button of proportion assembled on the operation stage, the rate of ink-supply and water-supply can be adjusted through this button under different printing speed and printing requirement which ensure the high quality of printing performance. Ink ducy roller has a sole operation button to contol the ink amount and roller clearance.

5、Three Main Cylinders

Three main cylinders are supported by imported high precision pre-tightened bearings which prevents the axial beating.the surface of cylinders adopt special high rigidity treated stainless steel material. Balance testing has been done on the cylinders. At the same time, the narrow gap and equal material distributig let them operate smoothly with the lowest impact. The printing cylinder adopts quick plate gripping device and plate point-fixing mechanism. “Printing through the bearers” running model has been dsigned for printing cylinder and blanket cylinder. Pressing cylinder adopts high point gripping. Front lay adjustment adopts eccentric mechanism. All of these ensure good quality of printing.

6、Ethanol Damping Unit

Ethanol damping unit is composed of water fountain roller 、water transmission roller、water bunch roller and water form roller. water fountain and water buch rollers are steel rollers, water transmission roller and water form roller are imported PU rollers. The gap and pressure between the rollers is adjusted via worm and eccentric sleeve, There are handles at the side of operation & start-up. There is some speed difference between the rollers, which let the thin water film form on the surface of rollers, so the balance between water and ink can be realized with small amount of water. The printing with advantage of full and fresh ink layer, vivid netting spot、clear level and easy drying.

7、Pushing Mechanism

There are 6 cloth adhesive tape on the pushing position to prevent the printing sheet beening bruised. The position-fix pushing head is eccentric, the parallel degree of pushing head at both sides and printing cylinder is adjustable.At the same time, column needle bearing and end face needle bearing assmbled in pushing head to ensure fexible operation and to avoid radial and axial shaking. When printing size change, push the button of size adjustment button , then cylinder and electromagnetic clutch act to move pushing head to the relative position to match your required printing size. Compared with original structure, the working efficiency has been improved a lot.

8、Synchronous Adjustment of Feeder and Printing Unit

The feeding phase should be adjusted according to printing size. For traditional structure, it is done through loosen connecting shaft and turn to certain degree then fasten the bolt. You may carry on above-mentioned action for several times to get the right effect which leads to the wasting of time and efficiency. Our company adopts motor mechanism to simplify this processing, operator just need to push “forward” or “backward” button to adjust the feeding phase automatically. This processing also can be done during printing.

9、Electronic Distributing
Regards to old type of machine, the distributing and feeding are realized through a air valve and cam, the parameter of distributing valve can not be changed also has complexed mechanical structure, once malfunction happen, it is not easy to repair. Our company adopts imported elctromagnetic valve and relay and stand cylinder to  realize this function.At the same time, it is easy to change the suction time of distributing & feeding cylinder.

10、Control of Piling Table

The moving-up & moving down of piling table is carried on via team-working of motor、worm wheel and chain. The step action of motor is realized through special clutch and reducer which make piling table have heave carring capacity and avoid the skid. The metal inspecter and double sheet checking device have been assmbled. The piling table stop rising when the metal inspecter sense the metal. The double sheet checking device remove the double sheet when it check the double sheet. The phase of distributing and feeding  cylinder suction is can be checked, in this way, the distributing suction cylinder only work at fixed angle to ensure the first metal sheet to be distribute exactly.

11、The Other Accessorial Mechanism
The cleaning device has been assmebled between feeding and pushing which can clean the dust and oil on the metal plate, it also take certain function of smoothing the metal plate. This device is optional depending on customer’s actual demand.

Separate mechanism ink route and printing cylinder. If one color printing segment does not take part in printing, it can be departed from printing cylinder free of operation and prevent the rubber roller from abration.

After printing, the printed metal plate may be drifted into rubber cylinder. So our company design and add the blowing mechanism to avoid this malfunction.