The eight-color rubber wheel is one of the main hotspots for the introduction of equipment in the printing field in recent years. This upsurge stems from the increasing competition in China's printing market and the growing maturity and refinement of the printed product consumer market. Rubber tires, especially commercial rubber tires, are expensive, and commercial prints with higher added value often use low-quantity reel coated paper. Due to the particularity of the roll paper, it is difficult to quantify the roll paper with the flat paper management method. However, if the management of the roll paper cannot keep up, even if the business volume is sufficient, the profitability of the rotary equipment is difficult to increase, so it is inevitable to explore the way to save rubber roller paper.
Master the characteristics of rubber wheels
There are three characteristics of rubber wheel production: high printing speed, many additional functions, and high operating cost.
Its high printing speed is shown in the top speed of general rubber wheels for books and periodicals up to 20,000 folio double-sided four-color / two-color / monochromatic posts, and the commercial and semi-commercial eight-color rubber wheels can reach a speed of 35,000 to 50,000 or more. . Therefore, if the operator's technology is not very mature, or the response to equipment failure, the treatment is not timely, or the problems that may lead to the scrapping of a large number of printed products cannot be found during the debugging stage, the paper waste caused by commercial rubber wheels will be very alarming.
Commercial and semi-commercial rotary machines have many additional functions, including drying, cooling, glazing, etc., to meet the requirements of commercial printing speed, large batch, multi batch, multi layer, personalized, high-end, color, etc. Often, it is very much needed, but accordingly, the paper path has been lengthened, so that the consumption of paper for threading and debugging is further increased.
High operating costs. Commercial rubber wheels have relatively high performance requirements for machine parts, raw and auxiliary materials, and even lubricants. In addition, if additional functions are enabled together, the operating cost is very high. Therefore, the requirements for various aspects of management are also relatively high. Otherwise, even if the processed printed products are high-value-added products, these attractive profits will be swallowed up by the consumption of the "noble" operation of the commercial rubber wheel.
Improve paper management
After understanding the above-mentioned characteristics of the production of rubber wheels, it is necessary to scientifically control the management to achieve the purpose of saving paper.
Two points should be checked in management. One is the warehousing clearance, and the other is the paper clearance. Whether entering the warehouse or printing on the machine, make a roll-by-roll count of the paper used on the machine according to the type and batch of prints to ensure that there are no missing or re-recording, accurate records, no fraud, paper warehouse management personnel and workshop Machines should regularly reconcile and supervise each other.
Each roll of the manufacturer's roll paper is marked with a weight on the outer packaging, but the weight of each roll is not exactly the same. It must be counted roll by roll before entering the warehouse and on the machine to ensure the accuracy of the amount of paper issued and used. Even if the roll paper is directly stacked in the workshop, the paper warehouse management personnel must register when the paper enters the field, and check with the paper management personnel in the workshop to sign each other on the other party's account. After the recipient has checked and registered in accordance with the regulations, the outer packaging of the paper roll shall be marked with the unique identification volume number prepared by the paper library management personnel according to the labeling standard, so that the next process can fill in the number when filling in other items.
The machine is continuously produced. After each printed product, the paper on the machine is rarely used up, and the remaining paper is unloaded and weighed before loading, which is both troublesome and not feasible. In the production process, a table is used for monitoring and continuous improvement of paper usage, that is, a paper input-output balance table. According to the situation, the situation in the paper input-output balance table should be summarized and analyzed on a monthly (quarterly / annual) basis, so as to find the predisposed problems, find the cause, and take corresponding corrective and preventive measures.
For commercial and semi-commercial 8-color rubber roller paper roads are generally long, you can make a special paper roll holder for threading paper, and use the core paper to thread the paper. Specific method: put the paper holder between the secondary tension and the second printing unit, pass through each printing unit and the post-press function parts, until the triangle plate at the folding part passes out, and then pass out at the secondary tension roller The paper rolls of the upper part of the paper are connected. This method can be used for paper-feeding operations such as loading paper and receiving paper after breaking. Through the actual measurement on the Harris-Heidelberg V30 semi-commercial 8-color rubber wheel, it can save 30 meters of paper at a time.
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