New progress in gravure processing of domestic cigarette packs
1. Several basic views
The preferred process and model for cigarette pack printing
Gravure printing is the preferred process for cigarette pack printing:
The integration of China's tobacco industry and the compression of brands will quickly lead to a "less variety and larger quantities" pattern.
High quality and stability will be the basic requirements of cigarette pack printing. Gravure printing has unparalleled advantages, and the more thorough the integration, the more obvious the advantages of gravure printing. More than 90% of cigarette packs in the US are printed in gravure.
Web gravure printing is the preferred model, with higher efficiency than sheet-fed printing presses, and more suitable process combination and in-line processing than sheet-fed printing presses (including gravure + offset printing combination). Therefore, the single-sheet cigarette pack printing machine will exist for a long time. The situation of other processes and models will be very complicated.
Environmental protection has become the most important issue
Anti-counterfeiting requirements continue to increase, but environmental protection is more valued. The comprehensive concept is: the entire life cycle of the cigarette pack includes the entire process of production and use. The processing of recyclable and degradable materials will receive continuous attention. Transfer paper is one of the current hot spots. Water-based ink will become the basic goal. Flexible packaging is bound to be more popular.
Countermeasure of cigarette pack gravure processing equipment
Electronic shaft transmission has become a new technology platform for web gravure printing, and is one of the three key technologies of the current gravure printing machine (electronic shaft transmission, printing trolley, sleeve type impression cylinder).
Fixed-length stretching compound transfer production line
Fixed-length stretching of holographic film, wet compounding with connection, transfer with or without connection, can greatly reduce the scrap rate and significantly reduce costs.
Countermeasure of cigarette pack gravure processing equipment
It is suitable for the improvement of gravure structure, drying structure and efficiency of water-based ink, ink tank materials, ink supply system structure and materials, etc. It is expected that the usage will increase the soft label cutting equipment.
2. Domestic progress
As of July 2005, the number of domestic electronic shaft gravure printing machines installed in the mainland of China has been installed in a total of 26 sets (sets) of electronic shaft transmission gravure printing machines, of which 16 sets (sets) were imported, accounting for 61.5% ; 10 sets (sets) of domestic equipment, accounting for 38.5% of the total. Among the 26 electronic shaft gravure printing machines, there are 9 cigarette pack printing machines, including 6 imported ones and 3 domestic ones.
There are 4 fixed-length stretching wet laminating machines, including 3 imported ones, all connected to the printing machine; 1 domestically produced one, not connected to the printing machine.
The competitiveness of domestic equipment is being reflected
The technical platform is the same as that of foreign countries, and international procurement is adopted; the performance index is quite close to imported equipment; more prominent cost performance; better at targeted innovation; and more convenient service.
Take the cigarette pack gravure printing machine as an example. It used to be imported equipment, but now more and more domestic equipment is used, especially the electronic shaft gravure printing machine. It is rapidly achieving multi-purpose, standardization and serialization.
Take Songde Company as an example, two units have been delivered in 2005, and four units will also be delivered during the year (including two production lines with fixed-length stretch laminating machines with connecting lines).
3. The gravure processing solution for domestic cigarette packs
The most typical solution for cigarette pack gravure processing:
Scheme: Connected wet compound + transfer + multi-color printing + cross-cutting (or other connected processing) (import).
Features: high technology, high quality and efficiency, high price.
Applications: high-end cigarette packaging, toothpaste boxes, shopping bags, etc.
Configuration type of domestic (cigarette pack) printing and processing production line:
Unwinding + multi-color gravure printing + cross-cutting (+ winding);
Unwinding + multi-color gravure printing (+ rewinding) + connection (or no connection) garden die cutting;
Fixed-length stretching wet lamination + transfer + multi-color printing + cross-cutting (+ winding).
The latest solution for cigarette pack printing and processing:
Scheme: fixed-length stretching wet lamination + transfer + printing + cross-cutting machine (+ winding).
Features: modular structure, patented technology, high cost performance
Modularization-four modules: "zero speed" docking; fixed-length stretching wet compound + transfer + (special unit); multi-color printing (with secondary registration function); post-press connection unit (cross-cut Rewind, etc.).
Patented technology-two key patents:
Patent 1: Compound transfer printing machine (exclusive domestic authorized production and sales)
Patent 2: Fixed-length stretching wet laminating machine (Songde Company)
High cost performance:
The performance index reaches or approaches the level of foreign equipment;
The price is only imported 1 / 3-1 / 4.
Three basic steps:
Electronic shaft drive gravure printing machine + cross-cutting machine;
Fixed-length stretching wet laminating machine (+ stripping machine);
Even machine production line.
Main technical features of fixed-length stretching wet laminating (+ stripping) machine:
The holographic film can be set arbitrarily;
Double electric eye detection, automatic length confirmation;
Servo drive for stretch roll;
Multi-section independent fully automatic tension control.
S type double cooling roller;
Roll coating or gravure coating;
Dry heat sources: electricity, steam, hot oil, natural gas, etc .;
Optional coating trolley, fault diagnosis information system or machine management system.
Fixed-length stretching wet laminating (+ stripping) machine
Actual test results:
Set length: 0.3mm.
Main features and configuration of SDP7650—350 gravure production line
Electronic shaft drive;
"Zero speed docking" unwinding device;
Connect the cross-cutting device;
Connect the winding device;
Adapt to water-based ink printing and glazing;
Main application: cigarette packaging.
Main technical parameters of SDP7650—350 gravure production line
Printing color group: 7 colors;
Printing substrate: paper 70g / m-450g / m2;
Material width: 650mm;
Maximum mechanical speed: 350m / min;
Range of plate diameter: medium] 20mm— ~ D300mm;
Maximum diameter of unwinding and rewinding: qbl550mm.
SDP7650—350 type gravure production line performance index measured results:
After the on-site inspection by the national inspection agency and users (paper: 230g / m '), the actual performance indicators of the SDP7650-350 gravure production line are:
Maximum mechanical speed: 350m / min;
Maximum printing speed: 300m / min;
Varnishing speed (water-based varnish): up to 250m / min.
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