575. What are the common faults in die cutting and indentation processing?
The failures that often occur in die cutting and indentation processing are:
①The cutting position is not accurate. ② The indentation is not clear, there are dark lines and fried lines. ③ The incision is not smooth. ④The printed matter sticks to the knife plate during die cutting. ⑤ Crack at the crease.
576. What is the main reason for the failure of die cutting and inaccurate indentation position? How to exclude?
â‘ The reason: the position of the row of knifes does not match the printed graphics (mostly due to the inconsistency of the rules of the printed product's gripper or the swelling of the paper during printing), the position of the drawing is not correct;
â‘¡Solution: The die-cutting plate should be recalibrated according to the printing image position; adjust the rules of the die-cutting machine to make the paper in place; try to adopt effective methods to reduce the adverse effects of the defects of the printed product on the die-cutting operation.
577. What is the indentation of the wire-breaking fault?
Wire-blasting refers to the failure of indentation breakage due to excessive pressure.
578. What is the dark line fault of indentation?
The dark line means that there should be no indentation on the finished product.
579. What are the main reasons for the unclear indentation, dark line, and wire explosion? How to exclude?
â‘ Causes: The height of the indented steel wire is inconsistent, and the material selection is not suitable; the die-cutting pressure is too large; the paper used for printed products is too poor or the water content is too low, which increases the brittleness of the paper and reduces the toughness.
â‘¡Solution: Readjust the height of the steel wire; properly reduce the pressure of the die-cutting machine; adjust the process conditions of the die-cutting and indentation according to the paper used in the printed matter, and try to make the two compatible.
580. What is the main reason for the failure of die cut incision? How to exclude?
â‘ Cause: The material of the steel knife is bad, the cutting edge is not sharp, and the die cutting is not suitable; the knife is not changed in time, and the cutting edge is seriously worn; the pressure of the die cutting machine is low or the height of the steel knife is not adjusted accordingly in time; The pressure is not true.
â‘¡Solution: Regularly check the wear of the blade of the steel blade, and replace the steel blade in time; select the steel blade of the corresponding material according to the printed paper; readjust the height of the steel blade or replace the new steel blade to obtain a solid die cutting pressure ; Appropriately increase the die-cutting pressure.
581. What is the reason why the printed matter sticks to the plate during die cutting? How to solve?
â‘ Cause: The rubber stuffed at the knife line is too sparse, which makes the resilience insufficient; the hardness of the rubber is not suitable; the blade of the steel knife is not sharp, the blade is not smooth after die cutting, the printing paper is too thick, and the die cutting pressure is too large.
â‘¡Solution: Choose the hardness of the rubber reasonably, and pay attention to the density of the packing, especially at the edge of the knife; do not adjust the pressure properly to make up for the lack of sharpness of the blade or replace the new steel knife in time.
582. What is the cause of the cracking failure at the indentation crease? How to exclude?
â‘ Cause: The indentation of the crack system on the outside of the crease is too deep or too narrow; the pressure of the crack system on the inside is too large and too deep.
â‘¡Solution: appropriately reduce the height of the steel wire; appropriately increase the width of the indented steel wire; reduce the die-cutting pressure or replace the slightly lower steel wire.
583. What are the characteristics of the fully separated automatic die cutting machine?
At present, the automatic die-cutting machines used by packaging and printing users in China generally only have the automatic waste removal function. All the individual printed products on each printed sheet of the processed product are still stuck together and need to be separated manually before they can be used. However, most European and American countries have already The use of a fully-separated die-cutting machine not only optimizes the production process, reduces space occupancy funds, reduces labor costs, but also improves production efficiency, achieves 100% quality control, reduces scrap rate, and improves product quality stability. In Europe and the United States, the use of a fully-separated automatic die-cutting machine has achieved product exemption. In addition, the use of a fully-separated automatic die-cutting machine also reduces the chance of human contact with the packaged products, which is conducive to the hygienic packaging of products such as food and medicine. It is expected that China will gradually apply full-separation automatic die-cutting machines from the production of cigarette labels.
584. Is there a model suitable for die cutting of thick paper (such as paper jam)?
Flat press die cutting machine suitable for thicker material cartons, signs, and self-adhesive trademarks, such as the M-500 flat press die cutting system produced by Spartanics, which is more suitable for thicker materials (0.15 ~ 1.5mm), single sheet or reel can be used. The speed of the machine can reach 150 strokes / min. It is characterized by the use of advanced photoelectric registration technology, and the registration accuracy is horizontal, vertical and deviation correction within ± Within 0.1mm, you can use high-precision male and female dies to punch out standard long-type jobs such as credit cards, and you can use low-cost steel bar cutters to process various medium and short-sized carton boxes and stickers (including civil aviation) Use luggage tags), retail membership cards with key rings, flexible circuit boards, dashboards and touch switches, and "Do Not Disturb" signs everywhere in hotels. Can achieve multi-purpose machine, both long and short version.
585. What is a margin index slotting machine?
The margin index slot is a good way to read and find. It is often used in handwritten notebooks, phone books, directories, dictionaries, encyclopedias and similar products.
Make an index card inserted in the folder, each letter should have a page of the specified thickness. For example, Kopp and Widmann manufacturing plants complete the entire process in a full set of equipment and can also do die cutting and packaging.
The margin index of the book must be made after binding it into a book, which can not only meet the purpose, but also meet the aesthetic requirements. As a professional factory, Swiss Durrer company provides index die cutting machines with various processing methods. The die-cutting accuracy of this machine is convincing. The index slotting machine of Ochsner + co can cut various index slots, as shown in Figure 83. The computer controls the slotting process of the three axes, and the operation and programming of the machine are easy to learn. [next]
586. What is the boxing process?
As the final process of box making, box making is the process of making printed products that have been die-cut and creasing processed into boxes. Can use manual operation or machine work.
587. What are the ways to make cartons into boxes?
The carton can be locked, nailed and bonded into a box.
588. What is the carton lock method?
Use the locking openings on each box surface of the carton or press the locking openings to connect to form a box. At present, the popular folding carton adopts this method to form boxes. The lock structure is shown in Figure 84.
589. What is the carton nailing method?
Use galvanized flat iron wire to seal the different box surfaces together.
590. What is the carton bonding method?
Adhesives are used to bond different box surfaces into boxes. Bonding into a box is beneficial to increase the fastness and strength of the carton. Sticky boxes are also called "glue boxes".
591. What are the different ways of sticking boxes?
There are two ways to stick boxes: manual stick boxes and automatic machine stick boxes.
592. What types of machine gluing?
There are many kinds of machine sticky boxes: sticky single side; sticky four corners; sticky double sides; sticky single side and buckle bottom.
593. What is the process of sticking boxes?
The process of sticking boxes:
Feeding carton → gluing → folding → counting → compressed → full collection.
594. What is the box-gluing process?
Taking the most common single-layer carton as an example (Figure 85), the process of making boxes by the machine: the first and third lines of the carton are bent at the front fold of the box making machine. The part is coated with adhesive, the second and fourth lines are bent by the precision folding part of the box making machine, and pressed and bonded on the conveyor belt, and finally output by the machine to complete the box making operation.
595. What are the characteristics of gluing boxes?
Compared with the traditional manual gluing machine, the gluing machine has the characteristics of smooth speed regulation, accurate counting, simple operation, straight folding box, reliable bonding, hygienic and efficient, stable quality, strong versatility, wide application range, etc. The machine, die cutting machine and other machinery are matched to realize the automatic operation of the box making industry.
596. What is the basic structure of a folder gluer?
At present, the folder-gluing machine is basically composed of 6 parts: paper feeding, pre-folding, gluing, folding, press ejection, and compaction collection. Driven.
597. What is the structure of the paper feeding part of the folder gluer?
The paper feeding part is composed of a paper feeding belt, a main front rule, a sub front rule, a side baffle, a paper feeding speed, a conveyor belt pressure wheel, and a paper stack rear baffle.
â‘ Paper feed belt: The tension of the paper feed belt should be even and equal, and tensioned so that the belt cannot slip on the transmission shaft. Use as many belts as possible according to the cardboard size.
â‘¡Main front rule: The main front rule must be on a certain paper feeding belt, and then determine the position of the main front rule according to the box board. The following principles should be observed: the main front rule should be placed between the first crease and the third crease as much as possible; the main front rule should be automatically close to the middle of the cardboard as much as possible; the main front rule should be placed as long as possible Opposite the front cardboard and the widest cardboard. The height of the main front gauge should be adjusted according to the thickness of the cardboard. It must be ensured that the cardboard can pass freely, but there must be no gaps. Use an electronic double-sheet detection system to control the appearance of double sheets.
â‘¢ Sub-front gauge: The role of the sub-front gauge is to further support the paper stack in front and prevent the stack from falling due to the gap between the side fences. The height of the sub-front gauge is generally three times the thickness of the cardboard.
â‘£Side baffle: When adjusting the side baffle, avoid making the cardboard too crowded between the two side baffles, generally leaving a gap of 1 ~ 2mm.
⑤Paper feeding speed: The paper feeding speed of the folder gluer is adjusted by a stepless transmission. Note that the stepless transmission cannot be used when the machine is stopped.
â‘¥Conveyor belt pressure wheel: The conveyor belt pressure wheel can align the cardboard against the side baffle to ensure the correct position of the side of the cardboard.
⑦Paper pile back fence: The role of the paper pile back fence is to tilt the paper pile slightly for feeding paper. [next]
598. What is the structure of the pre-folding part of the folder gluer?
The pre-folding part is composed of a pre-folder, an upper conveyor belt, and a beltless pre-folder.
â‘ Pre-folder: The height of the pre-folding guide plate should be adjusted according to the thickness of the cardboard. The guide plate should not slow down the speed of the cardboard.
â‘¡Upper conveyor belt: The pressure of the roller guide rail is adjusted according to the cardboard conveying situation. It is better to adjust it to convey the cardboard smoothly without affecting the connecting rod. The height of the pressure roller at the entrance of the cardboard is also adjusted according to the cardboard conveying situation.
â‘¢Without pre-folder: it is adjusted according to the thickness of the cardboard, so that the folding seam can be folded according to the requirements.
599. What is the structure of the glue part of the folder gluer?
The gluing part is composed of a plastic box and a rubber wheel.
â‘ Plastic box: The inside of the plastic box should be coated with a layer of butter to facilitate cleaning. Tallow is a kind of fat with silicon as the main component, and a small amount of use has little effect on the composition of the gum.
â‘¡Rubber wheel: Choose different rubber wheels according to the strength of the carton.
600. What is the structure of the folding part of the folder gluer?
The folding part consists of a folder and a folding transmission.
â‘ Folder: The folder should be adjusted according to the conveying condition of the cardboard and the gluing direction.
â‘¡Folding transmission: In the folding stage, the folding transmission has a great effect on the alignment of the box cardboard. Note that the folding transmission must not be used during shutdown.
601. What is the structure of the pressure ejection part of the folder gluer?
The function of the pressure ejection part is to compact the folded carton creases, and then accelerate the ejection to the compacted part. It consists of pressurizing device, adjustment point, inlet pressure wheel, outlet pressure wheel, and ejector.
â‘ Pressure device: Only one pressurization device is needed when processing small boxes, and two pressurization devices are needed when processing large boxes.
â‘¡Adjustment point: Each pressure device has a pressure wheel at the entrance and exit, its pressure and height can be adjusted according to the folded carton.
â‘¢Adjustment of the inlet pressure roller: When the inlet pressure roller is adjusted to a little pressure, it is most conducive to cardboard input.
â‘£Adjustment of the outlet pressure wheel: The outlet pressure wheel should be adjusted to a larger pressure according to the design of the carton and the desired result.
⑤ Catapult: Adjust the length of the lower catapult according to the outline of the rear of the carton. The carton should leave both lower catapults at the same time. The upper catapult should always be of equal length.
602. What is the structure of the compacting and collecting part of the folder gluer?
The compaction collection part is a mechanically independent device, but the power is still provided by the main motor. There are also some models where the compaction collection part is driven by a separate motor.
603. What are the common faults of sticky boxes?
Common sticky box failures are: sticky box is not strong; sticky box is not standardized; box glue.
604. How to eliminate the failure of sticky box?
The sticky box is not as strong as pulling the entire box with a hand to separate all the sides.
Approach:
â‘ Check the viscosity of the glue, select the corresponding glue or add edging device on the equipment.
â‘¡ Appropriately increase the amount of glue.
â‘¢ Increase the pressure and pressurization time appropriately.
605. What should I do if there is a non-standard sticky box?
Non-standard sticking box means that the sticking box is not accurately pressed according to the die-cutting indentation, usually called the bell mouth, and there is a skew phenomenon.
Approach:
â‘ When die cutting, the indentation line should be properly increased in pressure, and the line groove should be slightly wider (3mm is better). It is better to use shaped plastic to press the line.
â‘¡Check whether the folding rod of the folder gluer is straight or the screws are loose.
â‘¢ In case of glue problems, the running speed of the machine must be adjusted.
606. What should I do when there is a box adhesive failure?
Box glue means that glue should be applied where it should not be glued, making it difficult to form the box.
Approach:
â‘ Appropriately reduce the amount of glue.
â‘¡Check whether the rubber-coated wheel rotates straight, and check whether the shaft core is worn or deformed.
â‘¢ Relax the glued edge properly to prevent too much glue from flowing out.
607. What are the characteristics of box packaging?
The size of the box is larger than that of the box, it has higher resistance to compression and impact, and can better protect the contents. Boxes are convenient for transportation, storage and stacking. Generally used as an outer packaging container for goods transportation.
608. What are the characteristics of carton packaging?
Carton is a general term for boxes made of different cardboard materials. There are mainly cardboard boxes and corrugated cardboard boxes. Cardboard boxes with contents below 75kg are mostly used as inner packaging containers, and those above 75kg are mostly used as outer packaging containers. The carton is easy to process and form, with low cost, neat appearance, light weight, good sealing, and good protection of the contents. Suitable for mechanized and automated packaging operations, easy to load and unload, transport and stack, easy to open, can be recycled and reused. However, the mechanical strength of the carton is not high, and its moisture resistance, waterproof and mildew resistance are poor. The carton can be used to contain boxed, bagged, bottled, canned and light-weight fragile items. (to be continued)
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