The combination of inner drum plate making machine and laser technology
Equipped with PLC control system and safety protecting and alarm devices; Heat Sealing And Shrinking Machine Heat Sealing Machine,Heat Shrinking Machine,Film Sealing Machine,Automatic Heat Sealing Machine Shandong Sinolion Machinery Corp. Ltd , https://www.packingline.nl
According to the above working methods, the computer direct platemaking machine can be divided into: inner drum type plate making machine, outer drum type plate making machine, and platform type direct plate making machine. Internal drum direct platemaking machines mainly include Agfa's Galileo VS/VXT system, ECRM's Wildcat/Tigercat system, and Purop-Eskofot's DMX/ImageMaker system. Wait. Outer drum type platesetters mainly include Lotem 400VA/Letem 800V/Letem XL from Creoscites, and Plate Rite 4000/Plate Rite 8000 from Screen. Platform-type computer direct platemaking machines mainly include Barco's Mondrian system.
2. Laser technology
Light sources of the computer-to-platemaker include: gas lasers (such as argon ion lasers), solid-state lasers (such as FD YAG), and semiconductor lasers (LD). The laser source used by CTP can be divided into visible light source, infrared light source, and ultraviolet light source according to its spectral characteristics. See Table 1.
Table 1 Commonly used laser sources for CTP
Laser Type Wavelength (nm) Color
Argon lon 488 Blue
He-Ne 633 Red
FD Nd YAG 532 Green
Laser Diode 635 Red
Laser Diode 780 IR
Laser Diode 830 IR
Nd YAG 1064 IR
At the exhibition, Agfa showed a violet laser platemaking machine that uses a violet laser diode (400nm). The advantage of using a violet laser is that the imaging speed is improved because the short wavelength (400nm) characteristic makes the imaging motor rotate faster; it can be operated under a yellow safety light (no darkroom); the characteristics of the light source make the dot more accurate, At 250 Ipi, the dot range can reach 1% to 99%; the cost of laser diodes is lower.
Early computer-based platemaking equipment used blue (488nm), green (532nm), and red (633nm) visible lasers, and is now being replaced by infrared (830nm, 1064nm) and violet (400nm, 410nm) technologies.
3. Plate technology
Different from the film used in the imagesetter, CTP media is directly printed on the machine. Its accuracy and integrity are the key to the final product, and it is also one of the key factors restricting the development of CTP. Due to the high price of the plate, the cost of CTP is high.
At present, the types of plates can be divided into metal plates and polyester plates if they are divided by plate base.
Metal plate is mainly referred to as aluminum plate. The market share of aluminum plate in the United States accounts for about 90% of the total market. The main advantage is the high resistance to printing, a wide range of applications, and better graphic quality, especially for long-run printing.
With the rapid development of digital technology, on-demand printing, short lived more and more, the use of polyester version allows the printing factory to better meet customer needs.
The CTP plate is divided by coating, and there are two kinds of the most common plate: photosensitive resin plate and thermal plate.
Photosensitive resin plates are imaged with light and therefore require processing under darkroom conditions. It is most suitable for medium-to-long version of color commercial printing, the output line is 175Ipi, the plate making speed is fast, the stability of the printing on the machine is good, so it can make up for the inconvenience it requires in the darkroom version.
Thermal plates are based on thermal imaging technology and can therefore be processed in yellow light or ultraviolet light. The thermal CTP system has the best plate-making quality. Both the thermal negative plate and the positive plate can provide image reduction and printing performance. The advantage of the thermal plate is that it can restore 200Ipi, 1% to 99% of the dot, can be used for light room operation. At the same time, thermal imaging is also expected to achieve non-chemical processing plate technology, but its speed is not the fastest.
The current production CTP plates are: Agfa-DuPont's aluminum-based Silverlith and Lithostar CTP, Mitsubishi Chemical's polyester-based CTP, Mitsubishi Paper's polyester base and paper-based SDP and Silver. Master CTP version, etc., can be matched with a variety of models to produce high-quality plates and color prints.
The thermal plate includes Kodak Polystar's 830nm thermal plate, Agile's Galileo VLF-Thermalstar P970 thermal plate, Fujifilm's LH-NI and LH-PI thermal plates, and Mitsubishi Chemical's LT- 1 (830nm) and LT-G (1064nm) thermal plates.
The photosensitive resin plate mainly includes Agfa's N91 photosensitive resin plate. Fujifilm's thermal plates include Brillia LH-PI (Bright Pattern Thermal Plate), Brillia LH-NI (Negative Pattern Thermal Plate), Brillia LP-NS and Brillia LP-NN, etc. produced by Mitsubishi Chemical Corporation of Japan. High-sensitivity photosensitive resin plates, such as LA-S and LY-S plates.
Constant sealing with no need of changing. Easy to operate and maintain;
The length of shrink film is automatically adjusted by the electric and control timer;
The added horizontal and vertical electric eyes provide options for switch over. It`s suitable for sealing thin and small products;
With the design of side sealing, the packing length of products is unlimited.
The sealing height can be adjusted based on the product height.
Widely used in all kinds of products with different sizes and shapes
The machine is applicable to industries like food, gift, hardware, daily necessities, pharmacy, printing, etc.