Carton die cutting problems and solutions experts talk about suppliers

Sound from the supplier

Die-cutting is already a standard processing technology for carton packaging in the post-carton processing industry. According to the survey, about 90% of the cartons on European and American markets are processed by die-cutting machines. The more carton factories are equipped with die-cutting processing equipment, among which round-bore circular die-cutting machines are favored by all types of carton factories for their small investment and quick results. But nowadays there are many kinds of die-cutting machines on the market, and the level of manufacturing is also uneven. In addition, the technical capacity of the carton factory is not the same, so the carton factory will also encounter the use of die-cutting machines for carton processing. To a variety of issues. For example, the die cutting effect is not ideal, the die is not durable, the feeding position is inaccurate, the indentation line is irregular, the paper edge fluff after the die cutting, the paper cracking at the indentation, the poor cleaning effect, the inaccurate die cutting size, and the work efficiency Less effective play, etc. This series of so-called "die cutting problems" can be described as a variety of reasons. In order to better promote the carton die-cutting process, the author based on years of experience in the production of die-cutting machinery and on the basis of multiple investigations and research, I will introduce myself to everyone, hoping to help everyone better solve the diecutting problem.

(a) The reason for the equipment

Nowadays, the round press die cutting machine on the market in China is divided into two types: hard roll and soft roll.
Most of the die-cutting machines on the market today are soft roller die-cutting machines; there are two types of feed rollers: manual chain feeding, vacuum suction, push-pull feeding, and selling prices are from 20,000 yuan to 2,000,000 yuan. Not so, then for many die-cutting problems, how to solve from the equipment point of view, I would like nothing more than the following:

Die-cutting machine material selection: mainly refers to the die-cutting drum material and related consumables selection.

At present, some mechanical manufacturers use raw materials that do not meet the requirements in order to reduce costs and reduce the processing technology. If a roll plate or a cast tube is used to make a die cutting roll, and the roll is not quenched and tempered after processing, it is simply carburized or quenched. As the main part of the die-cutting roller, if its heat treatment effect is not ideal, then when your die-cutting machine is used for a period of time there may be uneven die-cutting. Even if it can be completely die-cut, it will be the pressure of the machine. Addition is particularly large, such die-cutting pressure will cause the corrugation strength of the cardboard to be destroyed to a great extent, thereby affecting the strength of the entire carton; then the selection of soft-roller pads is also more important, according to the author understands the current market The use of soft pads on the performance or cost performance, the United States CUE company should be better, not only because it is easy to install, long life, the most critical is the use of this pad die cut box cuts It is smoother and solves the problems of unsatisfactory paper fluffing and die cutting after die cutting. In addition, the selection of some standard parts such as bearings should be the main content to be understood when purchasing equipment. As a mechanical product, the quality of the material will directly affect the use of results, may not be aware of in the early stages of use just after purchase, but when used for a period of time, it will be a profound understanding of the investment in the equipment is value for money.

The configuration of the die cutting machine mainly refers to the feeding system of the die cutting machine and the adjustment of the control system.

One of the problems that makes carton manufacturers more troublesome is the poor strength of the manufactured box. In addition to the selection of the roller materials mentioned above, the configuration of the delivery system is also an important factor. The solution to this problem is to use flexible paper feeding. During the operation process, the gap of the paper feed roller must be adjusted properly. In addition, attention should be paid to the gap between the swing bar, the connecting rod, etc., and the problem of the mix of the lift plate and the push plate. This is the main way to solve the inaccuracy of feed position and die cut size. Some machine factories do not use the structure that can reduce the production cost for the carton factory because their own technology and processing capacity are limited or their production costs are reduced, and the user's use cost is not fully taken into consideration when designing and manufacturing the die-cutting machine. For example, the roller's automatic lifting device and rubber pad repair device, after using this device, the life of the bottom rubber pad and the life of the mold will be greatly improved, and with this device, the mechanical plant will add 10,000 to this device. Yuan costs around. In addition to inaccurate die cutting dimensions and irregular indentation lines, in addition to equipment adjustment and mold making errors, roller line speed compensation is also a more important issue. This problem is mainly established in machines equipped with rubber pad repair devices. On the basis of this, because the diameter of the roller becomes thinner after the surface of the drum is repaired, the linear velocity of the upper and lower two rollers will be different, which will directly lead to inconsistency in the size of the die-cut box and waste. In response to these problems, some manufacturers use mechanical methods and replace the transmission gear to compensate for the line speed. However, due to the uncertainty of the turning depth of the pad and some human factors, the effect is not very satisfactory. Therefore, it is recommended to use some automatic compensation devices. device of.

The influence of processing and manufacturing precision: The accuracy of the machine's manufacturing directly affects the speed and accuracy of the equipment.

In the round press die cutting machine, the main performance in the transmission gear processing accuracy, the use of lubrication systems and the processing accuracy of the various parts of the connection. If the accuracy of these parts can not be guaranteed, the accuracy of the equipment may just meet the requirements when it is first used, but after a certain period of time, the gap in each part increases to cause a cumulative increase in the feeding error. This problem must be investigated when you purchase the die-cutting machine. .

Equipment adjustment problems. Mainly refers to the adjustment of the gap and position of each part.

The equipment operator is required not only to be able to master the structure and adjustment of the equipment, but also to have a quick response capability, which is very effective for improving the work efficiency and processing accuracy. The author once went to Shandong Yantai Yongdong Packaging Company to inspect the automatic feeding die-cutting machine produced by the author's company. The company's daily processing of export fruit crates requires replacement of more than a dozen templates. Each change of board time includes adjustment of the time and cleaning of the work site until the delivery of the board to the site is generally more than ten minutes. The normal operating speed of the equipment is approximately 120 rpm.

(b) Reasons for cardboard

Because the cardboard cutting problems are mainly caused by cardboard errors in the printing process, cardboard size is inconsistent, cardboard warping, cardboard thickness uneven. These cardboard problems will affect the size of the box, the accuracy and the speed of the machine. The solution to these problems depends on the quality of the previous process. In the past, many people believed that the use of a round press die cutting machine to process color paper carton error is larger, in fact, the key is the configuration of the equipment, and now some machinery manufacturers of the chain die cutting machine feeding error can be controlled within a maximum offset of 1mm , but also can achieve manual feed upgrade to automatic feed conversion.

(III) Problems with the mold

The quality of mold processing, especially the selection and configuration of mold materials, are the main factors that cause mold cutting problems, such as poor waste discharge, irregular indentation lines, paper edge lift after die cutting, and paper cracking at the indentation. Die cutting problems. To solve this problem, we must first make a reasonable design of the shape of the carton, and at the same time reasonably match the die-cutting consumables according to the conditions of the cardboard and other related factors, such as cutters, press lines, bullets, and guard bars. If the product volume is large and the size requirements are strict, it is recommended that the professional plate-making company customize the mold, because they have a more reasonable mix of consumables, which will greatly help solve the die cutting problem.

In short, if you want your die-cutting machine to be fully utilized and truly achieve high-efficiency and high-precision, you must pay attention to the facility's performance, configuration, and operation when selecting it. The adjustment during use is also crucial. . Regardless of whether it is a machine or a consumable, you are not only considering purchasing costs when purchasing, but you ignore the more important use costs. Only in this way can you create better profits and profits.

(Wen/Wang Kai Province)