Features of Komori Perfecting Printing Presses

Komori Lithrone GX40P

The Lithrone GX40P is equipped with a perfecting cylinder that reverses the sheet, this convertible perfector type printing machine is not only capable of printing two sides at a time, but also one-sided multi-color printing (more than 4 colors). Komori’s unique configuration is to use three double size cylinders, for impression, transfer and reversal cylinders, reduce bending of the sheets by cylinders and reduce pressure on the printed sheets.

The PDC-SX device quantitatively measures the amount of difference between the front and back registers, reducing the inspection time and adjusting the front / back registers and the paper used for settings, thus reducing operator workload.

Moreover, PDC-SX and PQA-S support for printing production through in-line quality inspection, color control and automatic registration functions. The automatic OK sheet assessment function, an approach incorporated in Autopilot, automates all processes from test printing to mass production printing, not only shortening the make ready time but also standardizing the initial printing process.

The combination of Smart Sequence, Autopilot and one-pass, double-sided printing with Lithrone GX40P enables standardization and maximizes productivity. By using a high-sensitivity UV (HUV) or UV LED system before the unit perfecting and delivery, single-pass, double-sided printing with UV coating with instant curing. Because no work can be immediately forwarded to the next process, printing productivity is high and the time to complete the process is shortened, ensuring an increase in total productivity. Can be done waiting for drying and the work can be immediately forwarded to the next process, high printing productivity and time for completion is shortened, ensuring an increase in total productivity.

Komori Lithrone GX40RP

Even the Lithrone GX4ORP double-sided printing machine also has a maximum printing speed of 18,000 sheets per hour and prints B1 size images, it does not have a perfector sheet reversal mechanism. Sheetfed offset presses the carrier paper by gripping the sheet with grippers. However, the sheet reversal mechanism of the perfector-type presses changes the handle from the front end to the tail end when turning the sheet, and therefore the handle margins are required at both edges of the sheet.

However, the Lithrone GX40RP allows double-sided one-sided printing by passing sheets through three double-size transfer cylinders and one suction drum (RP unit) when changing printing from the back side to the front side. In other words, because changing the handle from the front edge to the edge is unnecessary, there is no front / back register gap when replacing the gripper and paper costs can be reduced because there are no edge margins. Although paper sizes vary throughout the world, the usual sizes for printing supplies in Japan are 625 x 880 mm and 636 x 939 mm. When printing 8-sided A4-size images on one side or 16-sides on both sides, perfector-type two-sided printing machines must use 636 x 939 mm paper.

Margin is required. However, because the RP-type double-sided printing machine does not require edge gripper margins, it can print on supplies of 625 x 880 mm, thus saving paper costs. In addition, because the Lithrone GX40RP does not have a sheet reversal mechanism and provides simple sheet transportation with one-sided handles, it can print on paper that is thicker than Lithrone GX40P.

The perfector type printing machine can print paper with thicknesses of up to 0.6 mm, while the RP type printing machine offers advantages because it can print complex paper on paper with a thickness of 0.8 mm. apply one-sided one-sided printing with a special color on the back side and add it to the front using the RP type package specifications.

More and more printers are worth printing with one or two colors on the back side, six or seven colors. On the front side and upholstery. However, Lithrone GX40RP is structurally unable to do multi-color printing which is capable of being carried out by Lithrone GX40P. This is a special one-sided one-sided printing machine. .

For the high speed and flexibility of double-sided, one-sided and one-sided printing, the Lithrone GX40P is the answer. Users in Japan and Asia tend to choose the RP type, while those in Europe and North and South America prefer the type of perfector.

Komori Lithrone S40SP

The cylindrical arrangement of the Lithrone S40SP, released in 2005, is a unique structure that prints the front and back sides alternately and does not use a transfer cylinder. The advantage of this structure is that it allows the installation of four-color two-sided machines in almost the same space as four-inch four-color one-sided machines. Especially where small factory buildings, such as in Japan, Lithrone S40SP are very suitable for production rooms that will not accommodate LithroneGX40P or Lithrone GX4ORP double-sided machines.

Although the Lithrone S40SP cannot do multi-sided one-sided printing because it uses a sheet-like transport system Lithrone GX40RP, many one-color, two-color and two-sided machines four colors capable of printing books, catalogs and text books. has been installed in Japan and China. In a unique cylindrical arrangement which alternates front and back printing, a special ceramic jacket on the front and side cylindrical print faces arranged in sequence is needed to prevent conventional ink adhesion on sheets that are still wet to the surface. The next impression cylinder. This machine might recommend UV printing, such an option would require the installation of a single-sided UV lamp on each printing unit because the front and back are printed alternately, the back side which is impractical comes from the point of view of the cost of installing the UV lamp and operational costs. Because the face and reverse impression cylinder of this series printing machine can print paper with a thickness of 0.2 mm because of the gap between the cylinders. Therefore, Lithrone S4OSP is used as a special two-sided printing machine in commercial printing using conventional ink, which has limited installation space.

Since 2010, UV has increasingly spread to commercial printing with the release of high-sensitivity UV inks, and increasingly many installation types of double-sided perfector and RP-type are not only capable of conventional printing but also UV printing. In recent years, the adoption of UV LED systems has increased in line with the desire to save energy. Komori provides three types of exceptional two-sided printing presses to increase customer productivity and performance.