A printing device for plastics, toys, glass, metal, ceramics, electronics, IC seals, etc. Pad printing is an indirect, collapsible head printing technology that has become a major method of surface printing and decoration of various objects.
Principle Process First, the designed pattern is etched on the printing plate, the etching plate is coated with ink, and then most of the ink therein is transferred onto the object to be printed through the silicone head.
Methods for Applying Ink to Etched Plates There are many ways to apply ink to an etched plate. The ink is first sprayed on the etched board, and then excess ink is scraped off with a retractable squeegee. At this time, the solvent in the ink remaining in the etched area evaporates and forms a gel-like surface, and the rear glue head descends onto the etching plate and sucks the ink.
The ink suction and printing product rubber head sucks up most of the ink on the etching plate and then rises. At this time, this layer of ink is volatilized again. The remaining unbleached ink surface is more conducive to the close combination of the printed object and the plastic head. The plastic head must be shaped to create a rolling action to remove excess air from the etched plate and the ink surface. The ideal combination of the ink and glue head during the production process is that all the ink on the etching plate is completely transferred to the object to be printed. During the formation process (approximately 10 μm or 0.01 mm thick ink is transferred to On the substrate, plastic head printing is easily affected by air, temperature, and static electricity. If the evaporation rate and the dissolution rate are controlled at equilibrium from the etching of the plate to the transfer of the plastic head to the substrate, it is considered successful printing. If evaporated too quickly, the ink will have dried before it is absorbed. If evaporation is too slow, the surface of the ink is not yet gelatinous and it is not easy to attach the rubber head to the substrate.
Technical features · Microcomputer control, functional and practical, easy to operate. The structure adopts high quality aluminum alloy, which is light and durable. • Independent rubber head up and down stroke and speed adjustment facilitate positioning. · All branded pneumatic components are equipped with automatic counters. Steel plate size: 100*100mm, 100*150mm, 100*200mm. · Model color adjustment is available in monochrome, bi-color, four-color and six-color.
The development of new pad printers in the direction of automation is a consensus in the industry. This is the fundamental way to increase production efficiency and reduce costs, and it is also an inevitable requirement for the transfer of printing technology from labor-intensive industries to technology-intensive industries.
At present, pad printers with a high degree of automation are more common than rotary pad printers. The printing process is completely automated. Affected by the degree of automation, most companies still have inadequate solutions in considering the quality problems that occur during the printing process. Even such a printing machine must face many challenges in order to complete true automated printing.
The general-purpose automatic pad printing machine is relatively rare, but the automatic pad printing machine that targets the specific product still has a lot of surprises. For example, a full-automatic pad printing machine for printing CDs, a full-automatic pad printing machine for printing bottle caps, etc. The automation of the pad printing machine essentially means the automation of the product delivery, and there is little change in the pad printing part. Various new technologies and information have broadened our horizons. The infiltration of other printing technologies has given us new inspiration. The requirements of our customers will inspire the passion of printing press manufacturers.
Any type of printing technology must face two kinds of paper feeding methods, one is a sheet of paper, and the other is a web of paper. Only the machines without web in the pad printing process. As has been discussed before, pad printing technology is the only technology that does not integrate with paper printing. If we say that pad printing technology does not have an advantage in terms of paper, it should mainly be attributed to the large size of the paper. A type of printing pad printing technique like conventional sticker paper may be achievable. It prints graphics on paper and there are no technical issues. Its printing area is very small, compared with the resin version of the adhesive printing machine, the printing roller machine is less difficult to manufacture, the operation is more convenient and the price is lower. From a technical point of view, since screen printing can be used for web printing, there is no problem with pad printing on webs. It is estimated that a prototype will be available within a year.
Printing machine with cleaning device Japan first installed a plastic head cleaning device on the pad printing machine to improve the printing quality. In the printing process, since the ink on the surface of the plastic head cannot be completely transferred to the printed matter, the residual ink of the resin will gradually change the edge of the graphic trace on the surface of the plastic head, causing the sharpness to decrease. There are two ways to solve this problem. One is to improve the deinking ability of the rubber head, and the other is to install a plastic head cleaning device. The feature of the plastic head cleaning device is that in the process of retreating the printing rubber head, there is one more printing action on the tape than the ordinary printing machine, and the residual ink on the surface will be removed.
For multi-color printing, the improvement of the accuracy of overprinting with the addition of a cleaning device is obvious. If multi-color Ep ~, J involves dot copying, then the phenomenon of dot gain will be significantly curbed. At present, domestic printing machines have not appeared in the trend of adding plastic head cleaning devices, which may be related to our understanding of the printing technology. Pad printing technology is less sophisticated ENVY technology, do not need to pay too much attention to the details of the printing process. Overprinting Accurate Pad Printing The traditional rotary pad printing machine has higher production efficiency, but the accuracy of overprinting is worse, not to mention that fine dot printing cannot be completed, and it is not easy to require a slightly higher color pad overprinting. . This is related to its own structural defects. In 2003, a Japanese printing machine manufacturing company took the lead in introducing a new four-color pad printing machine. This multi-color pad printing machine's movement form is very different from that of a traditional multi-color pad printing machine. It rotates around a central axis. The four groups of plastic head systems constitute a printing device. Each time the printing is rotated by 90 degrees, the ink supply device is constituted by four sets of printing plate systems that rotate around another rotation center. Each printing also rotates by 90 degrees, and each group of plastic heads only Fixed plate contact, overprinting is very accurate. This pad printing machine uses two precision rotating cylinders to control the rotation of the rubber head system and the plate system, respectively. The structure is compact and the movements are coordinated. There are almost no components machined, so overprinting works well.
Many craft gifts require elaborate printing. If overprinting is inaccurate, it will affect the value of the product itself. Due to the low threshold of pad printing technology, the proliferation of pad printing technology has caused printing companies to face fierce market competition and continuously squeeze profit margins. How to maintain a strong position in this competition requires the thinking of people in the industry. At present, the domestic printing companies generally have the problem of poor innovation capability. This is due to a long-term lack of perfect market economic system. Only those companies with strong innovation ability can truly lead our country's printing industry to face new challenges. Innovation is our weapon to overcome all difficulties. Only innovation can stand in the forefront and become the final winner.
