How to evaluate the press

With China's accession to the WTO, the tariffs on imported printing presses have dropped drastically, and the packaging, publishing, and printing industries will rapidly develop rapidly. The new wave of heat waves for buying printing presses will be on the way. According to China's experience in the introduction of printing presses for 20 years and the current trend of international high-speed, high-efficiency, high-quality, highly-automated, and highly-networked digital presses, we are targeting modern printers (here mainly referred to as sheet-fed lithographs. How to evaluate the printing press, whether it is the printing press manufacturer, the printing press agent, or the printing press user, are all very concerned and valued. Here, we consider from the following aspects.
First, operability. The higher the degree of automation of the press, the less chance the operator will touch the press and more time will reach the console. The operation is simple and easy, the operator's labor intensity is reduced, and the operator's main energy is placed more on the management of print quality. The highly automated devices of modern printing presses: automatic loading and unloading of printing plates, automatic cleaning of blankets and rollers, automatic registering devices, etc., which can greatly reduce the preparation time for start-up.
Second, proximity. It refers to whether the printing machine has a compact structure and the machine occupies a relatively economical space. Modern printing presses pay great attention to human-machine coordination. They all meet ergonomics in terms of design concepts. Operators change plates or blankets and gaskets, clean the surface of rollers, and adjust and maintain all related parts. When it comes to maintenance, it is easy to reach, easy to operate and comfortable.
Third, security. Refers to the operator's personal and machine safety at work. The printing machine must be equipped with protection and safety devices, and it must be sensitive and reliable. If the machine fails, the printing machine should automatically stop. This must not be vague.
Fourth, the printing quality requirements. Modern printing presses are characterized by high speed, smooth operation, high efficiency, accurate overprinting, and uniform ink. This is an important factor in evaluating the merits of a printing press. In the printing process, whether the printer is running at a high speed or a low speed, there must be strict requirements on the position and timing of paper transport, transfer, and printing. Especially when printing high-end products, the requirements are even higher. Therefore, the various devices and individual printers There must be certain accuracy requirements for the transmission and assembly between the devices to ensure that the overprint accuracy and ink color are uniform. Of course, the specific technical indicators of the printing press, such as the drum releasability value, the gear tooth gap, the transfer time coefficient between the color groups, and the arrangement of the printing cylinders, are to be demonstrated. In addition, the arrangement of printing cylinders, the size of impression cylinders, and the number and size of transfer cylinders should also be analyzed and compared.
Fifth, the printing press life. Requires that the printing machine has a shelf life, can guarantee its excellent mechanical precision, has good wear resistance, anti-aging performance, high quality printing quality. To do this, the printing press must be reasonably selected for materials and processing methods. The operator must operate safely during the use process.
Six, efficiency. The productivity of the printing press is generally expressed in terms of printing speed. The higher the printing speed, the higher the productivity. For sheet-fed presses, the maximum is over 20,000 impressions per hour in print/hour, and in meters per minute for web-fed offset printers, which exceed 1,000 meters per minute. In addition, modern printers can be equipped with light units that can meet all the needs of commercial printing and increase efficiency.
Seven, price performance ratio. The price of printing presses is an important factor in measuring whether a printing press is competitive. Only the printers with high quality and low price are the most competitive. Here we emphasize that: according to economic capabilities and the structure of the printed products, properly choose the press that meets their requirements.
Eight, service. Good pre-sales and after-sales service can maximize the role of the printing press and extend the service life of the printing press. Let customers feel at ease and satisfied.
Nine, appearance. The shape of the printing press should be in proportion, harmonious, and flat. ......
X. "Three levels". The so-called "three-ization" refers to the standardization of spare parts, the generalization of parts and the serialization of products. The higher the degree of "tripleization", the lower the cost of the printing press, the faster the popularity and development, and the higher the quality. Bring convenience to operators and managers.
Eleventh, flexibility and extensiveness. Modern printing presses can be widely used to print all types of paper, from 0.04mm thin paper to 1.2mm thick paperboard; at the same time, modern printing machines can convert double-sided printing from single-sided printing very quickly, easily, and safely. Only in this way can we meet various levels and types of requirements.
Twelve, environmental protection. Modern society pays great attention to environmental protection. When buying printing presses, we must also pay attention to whether the machine structure is suitable for low-alcohol or non-alcohol use. Whether each color group uses less detergent per cleaning cycle or not.