Q: Is the magnet of the magnetic roller magnetically open and closed?

A: The magnetic roller uses high-strength permanent magnetic block, high-quality steel and high-performance adhesive to ensure the stability of its long-term magnetic attraction function. The magnetic roller composed of permanent magnetic block is safe and reliable when die cutting the rotating link, and there is no need to worry about the sudden disappearance of the electromagnetic force and the accident during high-speed operation.

Q: How strong is the magnetic force of the magnetic roller?

A: After selecting the standard high-strength permanent magnet, the normal magnetic roller and flexible blade can withstand the rotation speed of the rotary machine up to 300 meters per minute. Rotary magnetic rollers are partially equipped with super-strength permanent magnetic blocks on the surface of the roller body, which makes the flexible blade's welt stronger and withstands higher speed rotary die cutting.

Q: Will the magnetism of the magnet roller weaken?

A: If the maintenance and placement are proper, the magnetism will not be significantly weakened within 10 years. Some users' magnetic rollers need to be repaired after a few years. The reason is often not because the magnetic force of the magnetic roller is weakened, but because of the wear of the pillow shoulder and the magnetic roller body, or the roller caused by improper placement pressure during use The shaft is bent.

Q: Will the magnetic force of the magnetic roller affect other components on the die-cutting seat?

A: The magnetic force of the magnetic roller only extends to the surface of the magnetic roller body by a distance of about 10mm, so it will not affect other components on the die-cutting seat. Of course, during the installation, try not to let the magnetic roller body contact with other components, such as bearing sleeves and bottom rollers.

Q: Does the magnetic force of the magnetic roller decrease with the diameter of the roller?

A: When the diameter of the magnetic roller is not less than the minimum recommended number of gear teeth, the magnetic force will not become smaller as the diameter of the roller is smaller. However, it should be noted that the diameter of the magnetic roller cannot be smaller than the minimum size recommended by the manufacturer.

Q: Is there a limit to the minimum size of the magnetic roller?

A: The smallest and safest size recommended by the manufacturer of the magnetic roller is: the circumference of the roller is not less than the width of the machine. However, if you must use a smaller size for various reasons, it is recommended to observe the 4: 1 rule: the diameter of the roller is not less than 1/4 of the width of the machine. Although manufacturers can make rollers smaller than 4: 1, in order to make the die cutting smooth and uniform, to avoid mold jumping or even bending, following the above rules will extend the service life of the magnetic roller as much as possible.

Q: Does high temperature affect the magnetic roller?

A: The permanent magnets of normal die-cut magnetic rollers can withstand temperatures up to 150 degrees Celsius. However, it is recommended not to place it under high temperature for more than 80 degrees Celsius for a long time. It has avoided the uneven surface caused by the expansion of the adhesive. It should be noted that normal die-cut magnetic rollers cannot be used for hot stamping seats. The high temperature of the hot stamping magnetic roller must be at least 240 degrees Celsius.

Q: What is the difference between split type and combined type magnetic rollers?

A: The split design means that the pillow shoulder is detachable. The heat treatment to 60 to 62 Rockwell hardness has ensured the wear resistance of the pillow shoulder. The pillow shoulder can be removed and replaced after a few years. It should be restored to its original shape as much as possible without wasting the original flexibility. blade. The conjoined design means that the pillow shoulder and the roller body are an integrated material. The advantage is that the production cost is slightly cheaper and the production time is relatively short. However, the disadvantage is that the pillow shoulder is poor in hardness and is not wear-resistant, resulting in a shorter life of the entire roller. Rotary magnetic roller adopts split design popular in Europe and Japan.

Q: Can the magnetic roller be repaired?

A: Yes, but it must first be inspected by the manufacturer. Depending on the condition of wear and damage, the most common repairs are to replace the pillow shoulder, repair the roller body, and correct the concentricity of the shaft.

Q: Can users order magnetic rollers and flexible blades from different manufacturers?

A: Yes, but with conditions. If the user's rotary machine has been equipped with a magnetic roller, but hopes to use a flexible blade from another manufacturer, the flexible blade manufacturer must know the diameter of the pillow shoulder and the diameter of the original magnetic roller. Some foreign magnetic roller suppliers often have the rules and error ranges that they have followed for many years. Even without its exact QC data, in the case where the user cannot measure it, the flexible blade manufacturer can infer its pillow shoulder diameter and roller body diameter, and then manufacture the flexible blade to match. However, for other magnetic roller manufacturers that have no rules to follow, in addition to requiring them to provide QC data or users' own measurements, flexible blade manufacturers speculate the way to design and manufacture flexible blades with precision requirements in the range of a few microns, and their risks There is a great possibility of making mistakes. In order to ensure a close cooperation between the two, users generally use magnetic rollers and flexible blades from the same supplier.

Q: Do flexible blades need to be positioned on the magnetic roller with pins?

A: It is generally not recommended and does not need to be positioned with pins. However, some special tasks, such as label manufacturers using magnetic rollers with relatively small diameters, the shape of die-cutting is particularly complicated and multi-line, in addition to the magnetic roller itself should be equipped with super strong magnetic blocks, pin positioning can completely avoid flexibility The possibility of the blade sliding on the surface of the magnetic roller body due to die cutting resistance.

Q: How can the flexible blade be accurately placed on the magnetic roller?

A: Under normal circumstances, the operator can first put the flexible blade on the magnetic roller next to the machine. The roller body of the magnetic roller has a horizontal border line for alignment, and the flexible blade also has horizontal and circumferential alignment lines, which has facilitated the alignment of the two. Then put the attached flexible blade and magnetic roller on the bearing sleeve, and install the die-cutting base like a fixed circular knife. Sometimes, for the convenience of the operator, the operator first installs the magnetic roller on the die-cutting base, and then sticks a flexible blade on the machine or changes the position. There is nothing wrong with this method of operation, but you need to be very careful to avoid the blade from touching the other parts of the die-cutting seat to wear the blade.

Q: Can flexible blades save cost without using magnetic rollers?

A: Generally not recommended to use this way. If you try to use a general metal roller without a magnetic roller, no matter whether you use double-sided tape to stick to the back of the flexible blade, or use adhesive tape to stick the edge of the flexible blade to the metal roller, the flexible blade cannot be closely attached. On the roller. The result is a flexible blade with a height error of only a few microns. Due to the gap between the back of the blade and the roller during plate placement, the phenomenon of uneven die cutting depth is produced. This is the case of more and more applications of automatic labeling today. Unacceptable quality of die cutting.

Q: What is the difference between flexible blades and back grinding?

A: The flexible blade was not accompanied by the application of back grinding technology when it was just promoted. Later, manufacturers who began to use back grinding technology found that back grinding could better control the total height of the flexible blade, and regarded back grinding as the highlight of its market promotion. In fact, at that time, CNC could not control the height of the blade at one time, but had to use the back grinding to adjust. Rotary flexible blades are imported from the most advanced CNC processing equipment in Europe. In most cases, the blades formed at one time do not need to be adjusted by back grinding. However, due to the uneven thickness of the die-cut material, especially the backing paper, back grinding is unavoidable in some cases. The flexible blade after backgrinding is not much different in quality from a blade that is successfully formed without backgrinding.

Q: What is the difference between the flexible blade used in the gap type rotary machine and the flexible blade used in the full rotary machine?

A: The manufacturing principles and methods of these two types of flexible blades are exactly the same. It is only different in design and final trimming. Most of the flexible blades used in the full rotary machine cover the entire magnetic roller body to match the synchronization of the printing and die cutting of the full rotary machine. Most of the flexible blades used in the gap type rotary machine cover the part of the magnetic roller body, in order to match the forward and backward type of materials on the gap type rotary machine. Because flexible blades used in gap type rotary machines are often designed with smaller blade sizes or fewer lines, the price is cheaper. When ordering, the user needs to give the manufacturer similar details to the flexible blades used in the full-rotation machine, such as line drawings and die-cutting material details.

Q: What is the difference in lifespan of flexible blades compared to engraved circular blades?

A: Under normal circumstances, the life of a flexible blade will be less than that of a fully hardened round knife, but because the blade wear is too much, the customer uses a flexible blade to make die cutting close to the round knife There are also many examples of revolutions. Depends on whether the wear is natural or collision wear. If the wear condition is not large and the cut facial paper is easy to cut, the flexibility of the flexible blade will be reflected: the user can add a layer of thin paper, film or coating The previous layer of ink can be temporarily cut in the place that was not cut, so that the bulk goods to be rushed can be completed first. For example, the engraving round knife can only be returned to the mold manufacturer for repair under the same circumstances.

Q: How is the layout design of the flexible blade different from the engraving round knife

A: The layout design of the flexible blade is the same as the engraving circular knife in principle. However, because the blade height of the flexible blade is shorter than that of the engraved round knife, the distance between the knife lines can be made smaller, and the rounded corners can also be made smaller. The principle of the minimum diameter of the drum must also be followed when typesetting, and as much as possible to avoid simultaneous cutting of many horizontal lines.

Q: Can the flexible blade be made into double-layer or multi-layer

A: Yes. For example, the labels are cut in half, and the dotted line between the labels is cut in full. Or some of the blades on the multi-layer label paper cut the first layer, and some blades cut the first and second layers of material. In order to avoid the jump of the knife mold during high-speed operation, the distance between the cutting line and the cutting line should be 3mm.

Q: How does the blade angle of the flexible blade affect the cutting product?

A: The blade angle design of the flexible blade is determined by the face paper, glue and backing paper to be cut. The blade has 90 °, 80 °, 70 °, 60 ° and so on. An experienced mold manufacturer will determine the appropriate blade angle based on the details of the cutting material provided by the customer and the past experience. Choosing the wrong blade angle during design will affect the cutting effect and life of the mold. Generally speaking, the larger the blade angle, the longer the life of the mold; but if the blade angle is small, the cutting effect will be better, and the possibility of burrs around the label is small.

Q: Can flexible blades be used to cut full wear

A: Although it is not the most ideal usage, many customers choose flexible blades to save costs or strive for fast delivery times. The flexible blade can not only be made into a dotted line for cutting full wear, a cutting knife, and even used for processing in-mold labels for cutting full wear. Of course, in addition to life, we must also consider the issue of waste disposal. The engraving round knife can be made into an air-punching or air-suction round knife, but if the magnetic drum itself is a standard type without any air-punching or air-suction device, the flexible blade is cutting small holes or small grooves (anything less than 6mm in size) Shape) There is a problem with waste disposal. The solutions that can reduce the problem and increase the possibility of success are: use thin foam to fill the blade to discharge waste, or raise the blade to make the foam's contraction and expansion discharge more effective.

Q: How is the cutting material of the flexible blade different from the engraving round knife

A: The flexible blade can be used to cut the vast majority of self-adhesive surface materials, including paper film, and can also be used to cut thin cardboard. However, due to the short blades, there are limitations in cutting thick cardboard and foam materials. For example, it is used to cut hard aluminum or iron sheet materials, and the life of the engraved circular knife has its inherent weakness. However, because the flexible blade is completed by CNC without any manual trimming, the traces cut on the backing paper have an overwhelming advantage over the engraving knife with manual trimming. The flexible blade has the application in cutting self-adhesive materials. Its absolute advantage.

Q: What kind of information are needed to order flexible blades

A: (1) Model of the rotary machine; (2) The information of the magnetic roller, including the number of gear teeth, the diameter of the pillow shoulder and the roller body; (3) The pattern of the cutting shape, pay attention to the knife line diagram to be provided The shape of the finished product, not the line drawing on the actual knife. If the circular die cutting is used on the material, the line drawing on the actual blade is the mirror image of the finished product after die cutting; (4) The details of the material to be cut. There are several ways to inform the supplier of the material details: (a) the material supplier ’s number and material list, (2) to inform the type of top and bottom paper, the thickness of the top and bottom paper, (3 mail a roll Material to mold suppliers.

Q: What to check after receiving the ordered flexible blade

A: In order to ensure that everything runs smoothly when you start the machine, after receiving the ordered flexible blade, you should first check whether the external packaging is intact. Then take out the blade to check whether the internal packaging is intact. Check the supplier test results provided with the knife to see the cutting shape, die cutting effect, and whether the cutting marks on the backing paper are ideal. It is best to open the package and carefully check that each blade is as good as it was when it left the factory. Re-pack the inventory after checking everything is correct, and it is ready to be put on the machine.

Q: Can the flexible blade be repaired after being worn?

A: Not possible in most cases. In addition to the situation mentioned above, add a thin layer of paper, film or ink on the bottom of the knife to make temporary adjustments. If you return to the original factory, you can repair the blade slightly, but it is generally not recommended to do so, because the flatness of the blade cannot be guaranteed, and the marks on the backing paper after cutting are difficult to ensure uniformity.

Q: How to maintain and prevent rust of flexible blades?

A: The flexible blade should be cleaned of ink, adhesive and any other impurities on the surface after use. Rotary flexible blades have introduced a popular surface treatment method in Europe, combined with chemical ingredients that are particularly useful for rust prevention, and have been able to resist rust in most cases. However, due to the wear of the surface coating treatment during die cutting and possible back grinding, it is recommended to spray a little WD40 evenly after use and cleaning, and then seal the package, which has achieved the purpose of complete rust prevention.

Q: How to pack and place the flexible blade?

A: Most of the flexible blades need to be bent at the edges, especially the blades suitable for small-sized magnetic rollers may need to be fully bent. Therefore, the packaging of the flexible blade is mostly packed in a tube. The user sprays the rust inhibitor on the flexible blade after use, seals it with a plastic bag, and puts it back into the tube for packaging. It can also be placed in a plastic bag after being sealed and hung straight.

The above questions and answers are the questions that Mr. Bill Shen has encountered and raised frequently when using magnetic rollers and flexible blades for many years among many trademark manufacturers in the Asia-Pacific region. Having lived in Australia for 17 years and promoted it in the rotating mold industry for nearly 12 years, Mr. Shen returned to China in early 2007 and founded Rotary (Guangzhou) Technology Co., Ltd. Introducing Europe's top production equipment, processes and raw materials, Rotary (Guangzhou) Technology, a wholly foreign-owned enterprise, was put into production in Guangzhou Huadu in early 2007 and began to supply flexible blades and magnetic rollers that are urgently needed in China and the Asia-Pacific market. Tel: +8620 86788828, 86788826, 86788822, Fax: +8620 86788820, Email:,

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