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There are many new and unique designs for the R700 ink path, such as automatic grading of the main ink roller in all stages; the “ghost†tendency can be eliminated when the rewritable ink roller is shaken; the ink supply program can be used to import and export ink under the ink according to the printing product. The initial setting; more importantly, in order to prevent the re-press printing and then re-press printing usually produce the ink phenomenon, Roland 700 ink road has a unique "ink chain automatic separation" function, this design also saves paper . 5. The patented Roland patented technology of the vacuum transfer board table and the pneumatic side pull gauge is also embodied in the R700 offset press, which minimizes the preparation time for printing. The vacuum feeding table uses the vacuum suction belt to drive the paper forward on the feeder plate, which is not affected by the size and thickness. At the same time, there is no need for manual adjustment of the brush, pressure roller, etc. The pneumatic gauge can be used according to different thicknesses of paper. Automatic suction setting, at the same time will not produce scratches on the surface of the paper, the operation is very convenient. 6. The new type of dampening system in the dampening system, R700 uses Roland Deltamatic triangle alcohol dampening system, the use of steel or hard water roller and large diameter water roller, water roller above the measuring water roller In order to control the fountain solution film thickness.
There is a small coupé roller above the plate roller, which can be contacted or separated from the first plate roller. If it is used in contact, the first plate roller can be emulsified, and the large-area plate can prevent ghosts. Occurrence of shadows; when used in a separate manner, with the use of a small print or printed metal ink, it is also used as a rider for storing sundries and other debris. The rotation speed of the large-diameter reel-water roller relative to the plate cylinder can be synchronized or decelerated by the remote control through the center console, and the paper or ink on the plate surface can be automatically removed under differential conditions to eliminate the prints. "White Point," which is the well-known Delta effect on the R700 dampening system. 7. The highly automated configuration R700 has been aiming at the high-end printing products market since it was promoted. It is a sign device for large and medium-sized printing companies to open up the market, and is used to satisfy users' requirements for high quality and fast delivery in the information age.
R700 adopts a standardized configuration scheme, such as non-stop feeding, non-stop paper collection, automatic cleaning of the ink roller, automatic cleaning of the blanket, and digital dusting are all standard configurations. When the print job is changed, as long as the paper size and thickness are input on the PECOM console, all automatic control motors can perform precise and rapid changes and adjustments, including the height of the feeder head, the left and right bars of the paper stack, and side pulls. Regulations, paper receiving station left and right flaps, vacuum suction wheel and so on. At the same time, the pressure will be automatically set according to the thickness of the paper, significantly reducing the printing industry's preparation time and reducing downtime. 8. PECOM control system The PECOM control system is a control system developed by Mann Rolland for more than 20 years of experience in the use of electronic printing control and presetting devices. PEO is the electronic organization of the printing process, and PEM is the electronic management of the printing process. The three-layered PECOM “Pyramid†factory management network can meet the requirements for centralized management of printing equipment in the future, and can also be combined before and after printing. Keep one open and create conditions for online printing. In order to facilitate Chinese users' operation, the R700 PECOM operation control adopts the Chinese menu display, which makes the operation and fault diagnosis more intuitive and truly reflects the human-oriented concept of human engineering design.
Mann Rolland Company's printing has excellent quality and is durable. The open system structure and PECOM digital control system have met the requirements of the future printing market. In this way, you can confidently move with the user to the future. The Roland R500 sets a new standard for four-web offset presses. It uses a new printing concept that has exceeded the development stage.
The machine's structure consists of two to eight color groups plus optical units, such as automatic plate (standard configuration), blanket cleaning device (standard configuration), impression cylinder cleaning device, ink supply unit temperature control device, air pressure cabinet (standard configuration), automatic dusting (standard configuration) plus powder suction, static elimination device and drying device. 1. Roller geometry layout guarantees board printing capability The R500 press is best at board printing, with up to 1mm thickness. "Flat" drum geometry - Double-diameter impression cylinders, transfer rollers, flat sheet-feeding tusks, flat take-up chains, and optimized paper transfer fronts ensure uniform thickness of the printable material Consistent. 2. The maximum print size R500 is one of the largest size presses in its class: 590mm x 740mm, the so-called American format. 3. The highest printing speed is an effective guarantee for increasing productivity The R500 is also the fastest press in its class, with a maximum printing speed of 18,000 sheets/hour. The unique design of the suction wheel, palletizer, and sample collection device in the entire paper feed area—feeding squeaks, drum squeaks, and the entire delivery area—has resulted in such high print speeds. 4. Print quality The newly designed inking and dampening unit - including optimization of roller geometry and roller bearings, innovative ink separation circuit, DELTA effect, hydrophobic roller, angle between water roller and metering roller, bridge roller and Techniques such as water roller (detachable) ensure high quality printing. The new glazing unit using the chamber-type squeegee concept creates the same high glazing quality. 5. Preparation time The machine's high degree of automation is reflected in the automatic print sheet size settings (intake head, side gauge, suction wheel, jaws) and stack height adjustment to ensure the shortest possible setup changeover time.
The circumferential and axial registration of the plate cylinder and the diagonal register of the transfer plate (also used for the coating machine) are controlled centrally by the PECOM.
Through the use of a mature and further optimized automatic loading system (standard configuration), the plate changing time is reduced to the shortest, and together with other inking and dampening process control functions, the time from the entire printing to the printing of sheets is greatly shortened. The waste of paper in the first phase also dropped significantly. 6. Operation R500 applies a new operating concept: people-oriented. The division of the operation function is clear; the operation assistance information can be retrieved through the display; the entire panel logo is updated, and the PECOM printing center uses a large number of graphic symbols, making the operation interface more user-friendly.
The zero setting of the ink key is completely automated, making the operation easier. The guarantee of the optimal ink key setting is also a prerequisite for the precise operation of the inking and dampening units, thus ensuring a very high printing quality.
The independent configuration of the cleaning device gives an overview of the monitoring process and the roller cleaning is fast and efficient.
Another important standard configuration of the machine is the automatic feeder side stack alignment device. Relying on its modern design, the appearance and function of the R500 are more in line.
Offset Press Technology Status, Product Function and Market Application Introduction--Six
Roland Type 700 and Type 500 Offset Press Features The Roland Type Sheet Press R700 has been in market for seven years since its introduction in 1992. It has a high degree of automation, high print quality, precision, and durability. Has gained market approval. R700 series offset press was awarded the international technology award by the GATF in 1994 for its outstanding innovative design, such as the PECOM press control center, which uses fiber to transmit data quickly and without interference, and independently controls the electrical box on the printing unit. The following is a brief review of the R700's unique design and construction aspects for your reference: 1. The “7 o'clock†azimuth of the main cylinder of the main cylinder aligns the plate, eraser and impression cylinders of the printing press into the mainstream of the modern offset press design in the “seven o'clock†azimuth direction. The R700 selects the ideal arrangement angle so that the printing paper is completely printed. After being pressed by the blanket cylinder, it is transferred to the transfer cylinder, which reduces the inaccuracy of overprinting and dot reproduction due to the peeling of the tail of the printed sheet due to still being peeled off on the blanket cylinder. 2. Use driveshaft + helical gear combination transmission method After the multicolorization of a single sheet offset press, a single helical gear transmission method will still be used to transfer power from the main drive wheel to each color group, theoretically ensuring very precise printing correlation. Position, but in fact, when the helical gear is driven, there is not simply a rotational power, but there is more horizontal shear force, especially multi-color machines with four or more colors. The speed and the load will have some slight effect on the overlay accuracy. . The new R700 is based on the meshing of helical gears between various color groups, plus a rigid long axis to evenly distribute power to each color group. This design will naturally improve the accuracy of registration and delay gear wear. So far, Mann Rolland has successfully installed two sets of 700 machines with ten color groups in China, namely the R710 Offset Press, which is the highest and longest configuration of the Asian sheet offset presses. Ways to make the offset press more multicolored. 3. The transfer roller between the “one-character†non-contact paper-passing machine and the air-cushioned R700 unit discards the cylindrical shape of the conventional transfer roller. It adopts a straight-lined structure without a cylindrical belly, so it is impossible to produce printed sheets. It is easy to operate and reduce the printing consumables by contacting and picking up dirt, without having to install anti-fouling mesh. It is worth mentioning that due to the use of a "figure" feeder, the registration of diagonals on R700 plates can be accomplished by automatic adjustment of the eccentricity of the conveyer, compared to the eccentric adjustment of traditional plate cylinders. The method does not produce the wasted paper and overcomes the deviation of the parallelism between the blanket cylinder and the printing roller due to the eccentric adjustment of the plate cylinder. Below the transfer device, there are two air-cushion panels forming a semi-circular air cushion to accept the inner cylinder, so that the printing paper can be completely floated during the transfer process, ensuring that both front and back sides of the printed product are free of any scratches. It is a very ideal structure. . 4. New Ink Roller Arrangement The R700 ink path design adopts a fast-response ink path system that can adapt to high-speed printing. The number of ink rollers is small, the diameter is large, and the heat dissipation performance is good. The ink supply method adopts the central ink supply method, that is, the second and third printing ink roller in the four printing roller are the main ink roller, and the first printing ink roller is in the half ink supply and semi-emulsification state. Relying on the printing roller, it only obtains the indirect ink supply of the third printing roller, which functions as a smooth ink layer.