Computer Rotogravure Printing Machine
ESJ5.0 High Speed Electronic Shaft Rotogravure Printing Machine
This electronic shaft type machine speed is high. Normal 500m/min. It is high capacity. Normal suitable for big printing factory. High reqirement industrial.
YADA5 Auto Color Register Three Motor Printing Machine
This YADA5 Auto Color Register Three Motor Printing Machine is middle speed. Printing speed is 150m/min.
JHY248 High-speed MLS Driving Gravure Printing Machine
This JHY248 High-speed MLS Driving Gravure Printing Machine drive by MLS system in each color. It is seven motor system machine.Printing speed 250 meters per minutes.
YADA2 Computer Rotogravure Printing Machine
This YADA2 Computer Rotogravure Printing Machine auto color register, economical type printing machine. Printing speed is 120m/min connect printing unit. three motor system.
ESJ-3.0 ELS Driving High Speed Rotogravure Printing Machine
This ESJ-3.0 ELS Driving High Speed Rotogravure Printing Machine drive by ELS system in each color. Use direct electronical drive type,printing unit use servo motor, connect with the printing cylinder.achieve digital printing, high speed,intelligent.
JHY220 Auto Color Register Gravure Printing Machine
This JHY220 Auto Color Register Gravure Printing Machine is seven motor system machine.Printing speed 220 meters per minutes.
WENZHOU SUNNY MACHINERY CO.,LTD SINCE 1999
Established 1999,name wenzhou jinghua machinery co.,ltd.exported machine to pakistan in 2007, exported machine to bangladesh 2008, exported machine to egypt 2009. and many other 50 coutries in these years.
Why Choose US
Our Factory
Established 1999,name wenzhou jinghua machinery co.,ltd.exported machine to pakistan in 2007, exported machine to bangladesh 2008, exported machine to egypt 2009. and many other 50 coutries in these years.
Our Product
Dry laminating machine and other common machine. One is for customerized machine, such as foil printing machine, foil slitting machine, wax coating machine,PVC wall paper machine and so on.
QUALITY ASSURANCE
Two work-shop. One is for gravure printing machine, slitting machine,dry laminating machine and other common machine.
Our Service
We sincerely welcome friends from all over the world to cooperate with us on the basis of long-term mutual benefits.
Gravure printing is abbreviated as gravure printing, which is one of the four printing methods. Gravure printing is a direct printing method. It directly imprints the ink contained in the pits of the gravure onto the substrate. The density of the printed image is determined by the size and depth of the pits. If the pits are deep , It contains more ink, and the ink layer left on the substrate after stamping is thicker; on the contrary, if the pits are shallow, the ink content is less, and the ink layer on the substrate after stamping is Is thinner.
Advantages of Rotogravure Printing Machine
The thickness of the ink layer is high, the saturation is high, the ink color is uniform and bright
The indentation of the graphics on the printing plate of the gravure printing machine changes with the density of the original color. Therefore, gravure printing is a conventional printing method that only has the thickness of the ink layer available to indicate the color density. It can rely on the mesh structure and ink layer. The thickness is different to reflect the shade of ink. The thickness of the ink layer of the printed product can reach 1-50μm, so the range of density change is large, the layer is rich, and the color is thick. It is suitable for reflecting the continuous adjustment and making exquisite high-quality picture books. In addition, the print quality is stable, and the ink color of different batches of prints is uniform.
The applicable printing materials are very wide, and the types of printing products are also very wide
With the development of science and technology, there are more and more types of gravure printing at home and abroad. You can choose inks in paper, plastic film, textiles, vacuum aluminized paper (gold, silver cardboard), metal foil, cellophane and other papers. Printing on basic and non-paper-based materials can also widely use non-toxic and environmentally friendly water-based inks and UV inks, which meets the requirements of green and environmental protection for cigarette pack printing.
The printing technology is simple and convenient, the printing durability is high, the printing efficiency is high, and the processing ability is strong
Compared with the offset printing technology, the printing principle of gravure printing is very simple. The gravure cylinder is made of no-film, digital electron beam or laser engraving plate making. The printing plate quality is very good, and it is very stable and has strong printing resistance.
Anti-counterfeiting
Gravure printing machine Engraved gravure printed graphics and text have a pronounced embossed feeling, the printing of security documents and large-denomination banknotes requires engraved gravure printing.
Computerized Gravure Printing Machine Features
Retracting and unwinding: The external disk type double-station receiving and discharging rack has a strong stability, the gas expansion shaft has a safety chuck for loading and unloading, automatically replaces the coil for reeling, and retracts and reels a horizontal linear knife, which can be positive and negative. Cutting, with take-up roll unit.
Printing: Vertical and horizontal automatic color registration and pre-registration device does not change the material pressure of the direct pressure mechanism, ink transfer roller transfer ink device to improve overlay accuracy and reduce waste loss. The squeegee moves into a biaxial oscillating type, quick-change squeegee, and independent motor control.
Drying: High air volume, high pressure and high efficiency energy-saving system, multiple air return routes, and a whirlwind layout throughout the whole area; the oven adopts integral insulation design, which can effectively reduce heat loss.
Machine: Gravure printing machine adopts seven AC vector variable frequency motor tension control system controlled by imported PLC and quantitative centralized lubrication system to ensure the high speed running flexibility of the guide roller.
As a kind of printing process, gravure printing is based on its thick ink layer, bright colors, high saturation, high printing durability, stable printing quality, fast printing speed and other advantages in the field of printing, packaging and graphic publishing. Occupies an extremely important position. From the perspective of application, in foreign countries, gravure printing is mainly used for fine publications such as magazines and product catalogs, packaging printing and printing of securities such as banknotes and stamps, but also in special fields such as decorative materials; in China, gravure printing Printing is mainly used for flexible packaging printing. With the development of domestic gravure printing technology, it has also been widely used in paper packaging, wood grain decoration, leather materials, and pharmaceutical packaging.
The printing plate of the gravure printing machine is composed of pits corresponding to the original graphics and the surface of the printing plate. During printing, the ink is filled into the pit, the ink on the surface of the printing plate is scraped off with a squeegee, there is a certain pressure contact between the printing plate and the substrate, and the ink in the pit is transferred to the substrate to complete the printing.
Gravure Printing Machine Technical Parameter
| Suitable for Printing Materials | Plastic film, paper and other reel materials | |||
| Mechanical Speed | 300m/min | |||
| Printing Material Width | 1050,1250,1450,1650mm | |||
| Overprint Accuracy | ≤±0.10 mm | |||
| Receiving and Unwinding Diameter | Ф600,800,1000 mm | |||
| Roller Diameter | Ф120 mm-Ф300 mm | |||
| Drying Method | Electric heating, steam heating, heating oil heating or gas heating | |||
| Optional Functions | Tower / Disc retractable coil, electronic shaft / Mechanical shaft drive, ink cart, anti-print, energy-saving module |
Structure of the Gravure Printing Machine
The gravure printing machine is that the printed text is concave, and the blank part is on the same plane as the outer circle of the plate cylinder. This printing method is popular among the public because of its rich levels and strong three-dimensional sense favorite.
The main structure of the gravure printing machine is composed of five parts: paper feeding, ink feeding, printing, drying and paper receiving.
• In the paper feeding section, the sheet-fed gravure printing machine is a continuous sheet-fed sheet-fed paper feeding, and the roll-fed gravure printing machine is used to continuously feed the roll paper.
• In the printing part, the arrangement of the plate cylinder and the impression cylinder is vertical, horizontal, and inclined, and the plate cylinder is arranged below. Generally, each unit has a plate cylinder and an impression cylinder. In order to increase the printing pressure, some are equipped with 2 impression cylinders.
• The ink supply device has direct ink supply which partially immerses the printing plate cylinder in the ink tank and indirect ink supply which transfers the ink to the printing plate cylinder by the ink discharge roller immersed in the ink tank.墨 方法. Ink way.
• The drying part is hot air heated by electricity or steam, and some use infrared or far infrared lamps to dry the printed matter.
• In the paper collection part, the single sheets of paper are stacked into a pile of paper, and the roll paper is to cut or fold the paper tape and stack or rewind into a paper roll. The structure of the printing part of the web multicolor gravure printing machine has two types: organic type and satellite type. The former is to set the unit according to the required number of colors. Each unit has one plate cylinder and 1 ~ 2 impression cylinders. The paper collection part adopts the rewinding method. Satellite type four-color gravure printing machine, the printing part has 1 large impression cylinder and 4 groups of plate cylinders. There is also a combination of gravure printing and lithographic printing or letterpress printing, die cutting, etc., in order to adapt to the different requirements of printed matter.
Preparation Of Gravure Printing Machine
• Check whether there are dust, garbage and debris unrelated to printing around the printing machine, and check whether the ventilation and exhaust facilities are intact.
• Check whether the original and auxiliary materials are adequate and meet the printing requirements. The printing of plastic film requires that the substrate film to be printed meet the following requirements: the surface is smooth and flat, without obvious stiffness, yellow and black spots, holes, and more than five wrinkles; the average thickness error of the substrate film to be printed should be within 10% Within (1m printing width), the calculation formula of the average thickness error can refer to the requirements of dry composite substrate film; under printing pressure, the elongation of the substrate film to be printed should be within 1%; the substrate film to be printed The surface tension should be ≥40dyn / cm; understand the affinity between the substrate film and the printing ink in advance. For films that are easy to dissolve and swell with the solvent in the printing ink, the printing speed and ink concentration can be greater. When printing on the coating layer of the coated substrate film, you should know how the coating resin adheres to the ink.
• Check the quality of the plate roller. Note that the plate roller of the latter set of colors should be slightly larger than the previous color, for example: the circumference of the plate roller of the second color should be greater than the circumference of the first plate roller by 1%, at least it should be slightly larger or equal. Overprint is correct. Check the pattern and color of the plate roller.
• Check if there is any jamming in the parts of the printer's conveying, feeding, feeding, drying, inking, traction and winding, the lubricating part is filled with lubricating oil, the oil path is smooth, and the instruments are intact. If there is an automatic ink viscosity controller on the equipment, the viscosity of the printing ink should be adjusted to the set value of 14 ~ 18s, and the mixed solvent should be poured into it, and connected with the ink tank by the ink pump. Check the computer's automatic register device.
• Mix the ink and choose the same primary color ink as the proof color.
Plate installation of gravure printing machine
Pay attention to the left and right sides of the plate when installing the plate. Do not tighten too tightly when clamping the cone to prevent the copper plate roller from bursting and being too loose. It will "escape" when printing. Install the plate roller according to the printing color sequence. The printing color sequence printed here is gold and silver ink → black ink → original cyan → original yellow → original red → white ink. The opposite is true when printing: white ink → magenta ink → yellow ink → cyan ink → black ink → gold and silver ink.
Apply ink with a squeegee. Then fix the angle with a squeegee, and flatten the ink to one side. At this time, the ink will follow the screen pattern. Due to the penetration and printing of the printing, you can print repeatedly.
Use the cleaned printed screen version can continue to save.
The principle of the monochrome adjustment machine is to make the gravure with the required printing pattern, and then transfer the steel plate to the printing material through the special silicone head, and adjust the special ink according to the material of the product to ensure the quality. The process of passing the machine is divided into the following four points:
Use a brush to apply ink evenly to the steel plate. Excess ink is scraped off.
Dip the ink from the printing head onto the steel plate.
Transfer the print head to the product to cover the pattern.
Applicable series of precision screen printing machine: all kinds of plastics, cosmetics, packaging boxes, metal plates, scale plates, acrylic, electronic products, household items, stickers, leather transfer paper, various cups, buckets, glass, baseball bats, wooden boards, etc., It can be used for beautiful and efficient flat printing.
Driving Mode of Gravure Printing Machine
The drive mode of gravure printing machine is divided into mechanical spindle drive and electronic axis drive mode.
The motor is connected to drive the rigid shaft through the pulley, and each printing machine is connected in series by a T-shaped bevel gear box and a rigid main shaft to drive the printing plate of each printing unit to run at the same speed.
The rigid spindle is characterized by a simple structure, and the printing plate speed of each printing group is completely the same. The main factor affecting the accuracy of the axial overprinting of the printing plate roller is the backlash of the T-arc bevel gearbox. In continuous and stable operation, the unidirectional pressure drive of the tooth surface can eliminate the influence of tooth pity. However, when the rotation speed fluctuates or the printing plate printing tension is large, due to the existence of the gap, an instantaneous retrograde vibration may occur when receiving a large reverse force.
Reasonably designed high-quality T-shaped gearbox is the key to the rigid spindle gravure printing machine transmission. The arc bevel gearbox with multi-tooth surface meshing is adopted, and the axial shim adjustment structure with adjustable gap is adopted to eliminate the large tooth gap caused by long-time running-in, and the effect of teeth is effectively reduced. In order to facilitate the elimination of the impact of the installation accuracy of the rigid long shaft on the transmission and reduce the on-site installation requirements of the rigid shaft, the flexible shaft joint is used at the junction of the long shaft and the T-arc gearbox.
Maintaining Rotogravure Presses for Optimal Performance
Regular Cleaning
Keeping your rotogravure press clean is the cornerstone of maintenance. Dust, ink residues, and debris can accumulate over time, affecting print quality and machine performance. Regularly clean all components, including cylinders, doctor blades, and ink pans. Use appropriate cleaning agents and procedures recommended by the press manufacturer.
Lubrication
Proper lubrication is vital to reduce friction and prevent wear and tear on moving parts. Consult your press manufacturer's guidelines for the type of lubricant and the recommended intervals for lubrication. Ensure that the lubrication schedule is strictly followed.
Inspection Routine
Develop a comprehensive inspection routine to identify and address potential issues before they escalate. Check for worn or damaged parts such as doctor blades, bearings, gears, and rollers. Replace any parts showing signs of wear promptly to prevent further damage.
Alignment and Registration
Accurate alignment and registration are critical for precise printing. Regularly calibrate and adjust the press to maintain proper alignment and ensure consistent print results. Pay attention to tension control to prevent web distortions.
Cylinder Maintenance
Rotogravure cylinders are the heart of the press. Regularly inspect them for signs of wear or damage, such as pitting or corrosion. Address any issues promptly and follow the manufacturer's guidelines for cylinder maintenance.
Ink Management
Proper ink management is essential for both print quality and press longevity. Store inks correctly, and avoid exposing them to extreme temperatures. Clean ink pans and doctor blade chambers regularly to prevent contamination and ensure consistent ink transfer.
Cleaning Doctor Blades
Doctor blades play a vital role in maintaining consistent ink transfer. Ensure that doctor blades are clean, sharp, and properly adjusted. Replace worn blades promptly to avoid print defects.
Temperature and Humidity Control
Rotogravure presses are sensitive to temperature and humidity fluctuations. Maintain a stable and controlled environment in your printing facility to prevent issues like ink drying too quickly or slowing down the drying process.
Web Tension Control
Proper web tension is crucial to prevent web breakage and ensure smooth printing. Regularly check and adjust tension settings to match the specifications of your substrate.
FAQ
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