Decorative printing is a new world in the printing industry in the world. This is a very large and professional big market. Most processing factories have their own special standards and processing technologies, and they purchase equipment according to their own requirements and technology.
The printing materials for decorative printing are mainly special papers and plastics. The thickness of these special papers is generally 70 g/m2, and most of them use water-based inks. In the past, PVC was generally used as a substrate for plastics. In recent years, it has been replaced by a PP substrate, and solvent inks have been used.
Decorative printing is usually done in four colors, but sometimes the color will be more for plastic printing, but the maximum printing speed will be very limited, usually not more than 150m/min, while the modern decorative paper printer can generally reach speeds of 250-300m/min. , high up to 500m/min. The maximum width of decorative printing materials is usually three, 1800mm for paper and film printing presses, 2250mm or 2700mm, mainly used for paper printing presses, but all use gravure printing.
The Cerutti Group is one of the world's largest manufacturers of gravure and flexo presses and is recognized as the world leader in gravure and flexographic printing equipment and technology. Since the first rotary gravure printer was shipped in 1947, Rudy Group, a leading technology company in the world, has put thousands of production lines into operation all over the world. Their first press manufacturer was established in 1956 in the town of CASALE near Milan, Italy. Currently, there are five factories in Italy, two factories in the United States, and Amsterdam, Zurich, Barcelona, ​​London, Pittsburgh, and Singapore. , Tokyo, Shanghai, Beijing and Hong Kong have offices. In 1997, the total sales amounted to 353.7 billion lire, of which about 80% was exported all over the world. Gravure printing machines accounted for 59% of the world market, packaging gravure machines accounted for 35% -37% of the world market, and now employs more than 1160 people.
Cerrudi successfully developed two models on the decorative printing press: R945 printing unit - this model adopts the automatic replacement of printing carts. R168 type printing unit - its optional configuration is a removable wall plate, it can adapt to the different nominal width of the plate cylinder, for example 2250mm and 2700mm requirements, the rewinding frame can also use the movable support arm to adapt to two different Width of the drum requirements, the winding rack can be equipped with wire slitting (slicing) device, there are two-station trolleys, replaceable plate cylinders, two-station trolleys, replace the ink tank.
The number of normal products based on decorative printing is generally several thousand meters long. The technical department of the Group adopts many new technologies on the machines to enable the products to be quickly replaced, further improving the repeatability of the products' printing and reducing the production of waste products.
Yao Luli, general manager of Sarudi (China) Co., Ltd., told reporters that compared with other gravure printing machines, the advanced nature of the Saurudi gravure printing machine has six:
First, the use of water-based ink, using ink on the roller to achieve high-speed printing, no ink splash phenomenon, can reduce the amount of ink required for circulation.
Second, at the end of product printing, the pre-cleaning of the plate cylinder and the ink supply component makes the product replacement process easier.
Thirdly, each printing unit adopts a shaftless, independent AC drive, which can also provide a main shaft and differential gear transmission. It does not require the use of a compensating roller mechanism, thus shortening the length of the tape.
Fourth, in order to compensate for the elongation before drying of the paper tape (belt) after printing, a special groove is machined on the transition roller surface. Therefore, there is no need to brake the transition roller and the production speed can be made higher.
Fifth, the plate cylinder is locked by a spring mechanism (without the use of gears), and the same mechanism is used on the largest publishing gravure printing machine. Due to the use of the highest quality components, there is no speed limit.
Sixth, in order to improve the drying efficiency and reduce the length of the tape, the drying box uses only one-side drying, and uses the front and rear nozzles at the same time to improve the drying effect.
With the above six advanced features, the recent production of the Sarudi gravure printers is available. In addition, the Sylody's sleeve flexible impression cylinder in the impression cylinder assembly is also quite distinctive. It consists of two parts, a fixed inner spindle and a rotating outer cylinder. The fixed parts are connected to the vertical guide rails, the two cylinders apply pressure to the drum according to the common gravure principle, and a hose is connected to one end of the drum to feed compressed air or hydraulic oil into the expandable inner air. When the inner space is compressed and inflated, the tubular ring can transfer the pressure to the outer sleeve through two rotary bearings, and the outer sleeve can freely rotate around the core. Currently, more than 1400 printing units have used Cerruti flexing impression cylinders. On the grainy printing machines used for decoration, the rubber sleeves of the Ruili flexing impression cylinders are used to make each printing unit cover. The replacement time of the cartridge does not exceed 2 minutes, and the tape does not need to be broken when the sleeve is removed.
Another improvement of the Syludi is the squeegee assembly, which can be lifted to the vertical upper position during product replacement. Its movement is driven by the motor and can be pre-set so that the same production can be repeated. If the doctor blade assembly is turned upright, it is not necessary to remove the doctor blade holder when replacing the doctor blade on the machine.
The printing materials for decorative printing are mainly special papers and plastics. The thickness of these special papers is generally 70 g/m2, and most of them use water-based inks. In the past, PVC was generally used as a substrate for plastics. In recent years, it has been replaced by a PP substrate, and solvent inks have been used.
Decorative printing is usually done in four colors, but sometimes the color will be more for plastic printing, but the maximum printing speed will be very limited, usually not more than 150m/min, while the modern decorative paper printer can generally reach speeds of 250-300m/min. , high up to 500m/min. The maximum width of decorative printing materials is usually three, 1800mm for paper and film printing presses, 2250mm or 2700mm, mainly used for paper printing presses, but all use gravure printing.
The Cerutti Group is one of the world's largest manufacturers of gravure and flexo presses and is recognized as the world leader in gravure and flexographic printing equipment and technology. Since the first rotary gravure printer was shipped in 1947, Rudy Group, a leading technology company in the world, has put thousands of production lines into operation all over the world. Their first press manufacturer was established in 1956 in the town of CASALE near Milan, Italy. Currently, there are five factories in Italy, two factories in the United States, and Amsterdam, Zurich, Barcelona, ​​London, Pittsburgh, and Singapore. , Tokyo, Shanghai, Beijing and Hong Kong have offices. In 1997, the total sales amounted to 353.7 billion lire, of which about 80% was exported all over the world. Gravure printing machines accounted for 59% of the world market, packaging gravure machines accounted for 35% -37% of the world market, and now employs more than 1160 people.
Cerrudi successfully developed two models on the decorative printing press: R945 printing unit - this model adopts the automatic replacement of printing carts. R168 type printing unit - its optional configuration is a removable wall plate, it can adapt to the different nominal width of the plate cylinder, for example 2250mm and 2700mm requirements, the rewinding frame can also use the movable support arm to adapt to two different Width of the drum requirements, the winding rack can be equipped with wire slitting (slicing) device, there are two-station trolleys, replaceable plate cylinders, two-station trolleys, replace the ink tank.
The number of normal products based on decorative printing is generally several thousand meters long. The technical department of the Group adopts many new technologies on the machines to enable the products to be quickly replaced, further improving the repeatability of the products' printing and reducing the production of waste products.
Yao Luli, general manager of Sarudi (China) Co., Ltd., told reporters that compared with other gravure printing machines, the advanced nature of the Saurudi gravure printing machine has six:
First, the use of water-based ink, using ink on the roller to achieve high-speed printing, no ink splash phenomenon, can reduce the amount of ink required for circulation.
Second, at the end of product printing, the pre-cleaning of the plate cylinder and the ink supply component makes the product replacement process easier.
Thirdly, each printing unit adopts a shaftless, independent AC drive, which can also provide a main shaft and differential gear transmission. It does not require the use of a compensating roller mechanism, thus shortening the length of the tape.
Fourth, in order to compensate for the elongation before drying of the paper tape (belt) after printing, a special groove is machined on the transition roller surface. Therefore, there is no need to brake the transition roller and the production speed can be made higher.
Fifth, the plate cylinder is locked by a spring mechanism (without the use of gears), and the same mechanism is used on the largest publishing gravure printing machine. Due to the use of the highest quality components, there is no speed limit.
Sixth, in order to improve the drying efficiency and reduce the length of the tape, the drying box uses only one-side drying, and uses the front and rear nozzles at the same time to improve the drying effect.
With the above six advanced features, the recent production of the Sarudi gravure printers is available. In addition, the Sylody's sleeve flexible impression cylinder in the impression cylinder assembly is also quite distinctive. It consists of two parts, a fixed inner spindle and a rotating outer cylinder. The fixed parts are connected to the vertical guide rails, the two cylinders apply pressure to the drum according to the common gravure principle, and a hose is connected to one end of the drum to feed compressed air or hydraulic oil into the expandable inner air. When the inner space is compressed and inflated, the tubular ring can transfer the pressure to the outer sleeve through two rotary bearings, and the outer sleeve can freely rotate around the core. Currently, more than 1400 printing units have used Cerruti flexing impression cylinders. On the grainy printing machines used for decoration, the rubber sleeves of the Ruili flexing impression cylinders are used to make each printing unit cover. The replacement time of the cartridge does not exceed 2 minutes, and the tape does not need to be broken when the sleeve is removed.
Another improvement of the Syludi is the squeegee assembly, which can be lifted to the vertical upper position during product replacement. Its movement is driven by the motor and can be pre-set so that the same production can be repeated. If the doctor blade assembly is turned upright, it is not necessary to remove the doctor blade holder when replacing the doctor blade on the machine.
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