Paper-cutting process-the prerequisites of economic treatment and the trend of further development
The development of prepress and printing processes is very rapid and continues. The pace of process innovation is accelerating. Yesterday's printing equipment has been continuously replaced by more advanced equipment with better quality and higher productivity. It can process and cut 15,000 copies or more of printed matter per hour.
Increasing printing productivity means that more materials need to be handled and processed. Polar has kept pace with development from the beginning-from the continuous modernization of the paper cutter to the latest integrated microcomputer-controlled paper cutter. In addition, Polar also recommends a smooth production process, using a peripheral system for material handling.
In 2000, Polar introduced a new set of products. They are not only for the supplement of existing equipment, but also for large-scale label production including high-standard production equipment to improve the performance of supplementary products.
Polar products include the following equipment;
The guillotine cutter, from the smallest Polar 66 t to 176, that is, the width from 66 cm to 176 cm.
Peripheral equipment, used for material processing, paper lifting table, paper roll elevator, paper stacking equipment, buffer stacking equipment, automatic paper loading and unloading equipment, transportation system, complete paper cutting system, complete paper cutting system composed of the above components, various Trademark labeling system including online conveyor, die-cuters forming cutting and die cutting and strapping equipment Pile Turners palletizing equipment paper stack turnover machine
Generally speaking, cutting is a simple work process, but with the great progress of industrialization, in the field of paper processing in the printing industry, the traditional process has also undergone tremendous changes. Printing business opportunities and bookbinding machine books have undergone several generations of changes from tape-controlled paper cutters to the latest microcomputer-controlled cutting systems. Research and development have produced new paper cutters and cutting system equipment with high cutting precision, strong planting capacity and high output. In just a few years, there have been cutting machines with color displays, full-image operation guidance, visual processing, and computer-aided cutting external programming and editing of production data. The purpose of all these improvements is always to make the cutting process more economical. The result is higher output per process and shorter preparation time. Here are some important aspects of the cutting process.
1. Material preparation 2. Cutting process 3. Paper loading and unloading 4. Requirements for further processing 5. Requirements for employees.
Description:
1. Preparation of cutting materials-
Including paper inspection or quality control, including quantity quantification, and paper alignment (alignment-that is, through the conventional paper-breaking process code processing).
2. Cutting process-including actual cutting operation,
The method of programming operation can be done manually, automatically or can be carried out on other work stations away from the paper cutting.
In addition, it also includes automatic programming of the machine room of the machine, which can be used to assist the material processing on the machine's paper cutter table or paper cutter.
The selection of the necessary machine cutters depends on the requirements of the specific cutting process. Under the conditions of industrialized large and high-scale production, it is becoming more and more important to reduce the waste of cutting.
3. Paper loading and unloading capacity of the cutting machine.
The process can be manual or automated. According to the volume of the material, the paper can be loaded on the desktop of the front or back side of the cutting machine through the cutting machine. According to the required work flow, the paper can be unloaded on the left or right side of the machine cutter.
4. Requirements for further processing Paper cutting is not always the final stage, and the materials are often transported to another place for further processing. Therefore, the paper cutter can be connected to the next work station to shorten the entire production cycle.
5. Requirements for employees
Choosing the people who work next to the cutter is very important for productivity and efficiency, and many people cannot guarantee maximum output. The important thing is how to arrange a person with knowledge and ability, and to equip the appropriate equipment with the support of the appropriate equipment.
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After focusing on these cutting processes, the following prerequisites for efficient cutting are easy to understand;
1. High-performance paper cutter 2. Orientation of the application-oriented options of the paper cutter 3. High-quality cutting tools (knife and good grinding device).
4. Appropriate processing equipment (peripheral equipment)
5. Good material preparation before cutting. 6. Arrange qualified personnel in material handling positions.
Due to the special structure of the printing industry, the size of the printing company, the production line, the printing process are different and other characteristics, the paper cutter and the manufacturer must provide various grades of paper cutters with different levels of automation. . There are two Polar paper cutters with very special electronic controls. There are two models, available in 7 sizes. They all use a dedicated electronic control system to meet the various needs in the art and picture printing industry.
The corresponding cutting length of Polar paper cutter is: 66,78,92,115,137,155 or 176 cm.
The cutting machine models are Polar E and Polar ED.
Polar E-Eltromat is a basic model suitable for conventional cutting business. It is programmable and has a storage capacity of 128KB, which is equivalent to about 12,000 cutting positions. This type of machine is equipped with automatic programming and the most important function of arranging automatic work sequence. This type of machine has the most important function of automatic programming function and automatic execution of working procedures. It also has a simple text input function, which can record the name of the customer and the user to write their own name and description of the process job.
Polar ED-Eltromat Dialog is the most high-end in this series, it represents the future development direction of paper cutting technology. It can meet the requirements of various challenging cutting processes and programming. The Modes ED model is a paper cutter specially designed for professional printers with a special design. It can eliminate all kinds of possible problems and work without difficulty. It has a wider range of options to adapt to various special purposes. It is like adding a text keyboard of an integrated integrated circuit, allowing the operator to input job descriptions and other process specifications and related production information. At the same time, ED is designed for the entire cutting. It is designed for the control center of the computer-controlled cutting machine system.
All modern Polar cutter paper cutters, from the most basic standard models to the highest models, have the following outstanding technical and operational performance:
easy to use:
The control panel is placed at a height that is convenient for the operator to operate, and the flat key input system is completely dust and splash proof.
Even very difficult programs can be quickly recorded, because the arrangement of control instruments is very logical, and the various symbols are easy to understand.
All Polar cutters and paper cutters can use text in various languages ​​including Chinese, and talk to machine cutters. They can display all cutting procedures, accompanied by various information, such as command data, material processing information, clamping pressure, paper pressure, knife angle, operating mode and prompts according to the purpose of use.
Modern paper cutters include the following technical features:
* High resolution 10. The signal transmission quality of the 4 "LCD display can effectively visualize the process.
With the help of a modular programming system or an external Polar Compucut software sb device, the page layout on the printed sheet to be cut is automatically generated on the paper cutter on the arrangement of the pictures on the paper.
* High-precision measurement and positioning system
It includes a direct pulse generator, a frequency-controlled drive motor, a high-precision shaft with universal ball bearings, and a precise linear guidance system for backgauge service used by the back gauge.
The pulse generator is directly and firmly connected to the rotating shaft. This element transmits the measurement data to the LCD display diode as an electrical signal, and the cutting position is displayed with an accuracy of 1/100 mm.
Rear gauge drive: Frequency-controlled drive motor with automatic braking and adjustable acceleration and deceleration allows the maximum reverse speed to reach 30 cm / sec.
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Paper clamping pressure
According to the pressure instruction, at the working height, any type of cutting material can be adjusted quickly and hydraulically steplessly. This function uses hydraulic stepless speed change. At the normal working height, the pressure level of different types of paper can be quickly adjusted according to the precise pressure level. Polar's paper clamping pressure range is wide, and the minimum pressure is extremely small to handle extremely fragile paper correctly. For example, the minimum pressure of Polar 115 can be flexibly adjusted from 150 kg, and the maximum pressure can be adjusted to 4500 kg.
Knife drive: The knife drive system is designed to be solid, strong, safe, and requires little maintenance. The worm gear runs in the fuel tank.
Hydraulic clutch: It transmits all the driving force to the knife. In fact, this clutch is basically not worn.
Self-diagnosis system:
Continuous monitoring of all functions of the machine's paper cutter, if there is any error or abnormality, there will be a signal display immediately, clearly displayed in text, so that sometimes, as long as a phone, you can quickly eliminate the fault.
In addition to the performance of various standards, Polar can provide many solutions for specific cutting applications.
Polar Autotrim is the world's first high-speed paper cutter, which can automatically remove waste materials, and can automatically collect small cut products together on the auxiliary table support board. Autorim is the most efficient development in high-speed paper cutters since there are computer-controlled cutters.
The advantage is that the operator does not need to manually remove the waste when picking it. When the waste is cut out, the waste can be removed by opening the front table of the machine's paper cutter. This function is equipped with this option to increase output by up to 30%.
Autotrim has the following functions:
1. There is a definite opening start position.
2. In the cutting cycle: rely on the procedure to open the front table top, the scraper moves upwards, and scrap scrap falls into the waste bin or sucks in through the suction duct.
3. The back gauge pushes the material to be cut forward to the front table top or auxiliary table support plate.
4. The cutting machine is ready for the next cutting, and the materials have been put on the auxiliary workbench support board.
Back to the post-transition block gauge, tilt type rear block gauge and Fixomat
There are many special options to support the operator for high-precision cutting. They can align the printed image translation with the cutting line, compensate for more or less cutting, or simulate aligning the paper code with the points written on the registration marks on the printing machine and paper cutting machine.
Gripper-type paper loading system
This optional accessory is attached to the rear table of the machine's paper cutter. It can stack multiple paper stacks from the paper stacking machine, the paper loading table to the desktop, the air pressure lifting paper platen or other equipment. Lift it up and put it on the rear table of the rear table of the paper cutter, provided that a retractable side gauge that can be extended and retracted is installed on the paper cutter. The gripper can grip the paper tightly and accurately place a certain number of sheets so that the number of pieces of paper can be accurately placed on the cutter.
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Optional accessories Option Downholder limiter / Fixomat
The downholder
Fixed push-down device This push-down device can smooth some difficult materials, such as curled paper piles or plastic films, and put them neatly on the rear stop.
Such as: curled paper piles or plastic sheets, etc. materials that are "disobedient" to the back gauge.
Automatic clamping paper pressure adjusting device machine
This is a very effective option for a high-speed paper cutter, which can automatically adjust the clamping pressure of the paper press (beginning so far, this work is done manually), when cutting the long end and short end, computer programming can automatically Adjust and compensate the pressure as required.
Electronic probe: According to the order of the paper and the cutting length, it will automatically adjust to the appropriate clamping pressure for any cutting.
A specific material only needs to be selected once for clamping pressure.
Advantages: constant high cutting quality, without damaging the material, and extending the life of the knife.
Downholder under the limiter in front of the knife
This latest patented paper cutter is available as an optional patented part on the cutter, which prevents slippage or inaccuracies when cutting small products.
Cutter: Logically speaking, modern cutters, no doubt, require high performance. Different manufacturers calibrate the grade of knife due to different needs, and the range of quality selection is also very large.
Standard knife: It is suitable for use under various normal working conditions without frequent grinding.
High speed steel knife:
This is a composite steel knife, the blade is made of special alloy.
It has been proved that this knife is the safest and has the best performance when used to cut difficult and uneven paper.
Carbon steel knife:
This level of knife has a particularly sharp edge that resists wear. As long as it is used in the right place and the method of use is correct, then its performance is quite 20 times that of a standard steel knife.
Knife quality:
Knives of different quality should be selected according to different use occasions. For economic reasons, it is indeed necessary to compare the costs within a certain period of time.
Key points: For any special tool, if you want to use it well, you must have a knife sharpening device in your area.
The figure shows the geometry of the cutter. The average cutter angle is 24 degrees. Depending on the quality of the paper and card, the angle of the knife may also be different. The inclination or angle of the carbon steel knife should be doubled.
This chart illustrates the performance of various grades of knives under general conditions. Of course, the actual performance is related to the specific working conditions and applications.
Toughness is the ability of a material to withstand repeated tossing by machines and transportation. Toughness is the ability of a material to withstand mechanical action.
Abrasion resistance-is the ability of the blade to withstand surface wear and keep the blade sharp during long-term use.
Abrasion resistance-refers to the ability to use for a long time after grinding (that is, the ability to reduce repeated grinding), which is guaranteed by special processes and equipment.
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peripheral equipment:
All the previous demonstrations want to highlight the process and performance of the high-speed cutter.
However, to achieve this performance, the material flow must be properly arranged through the correct preparation of the cutting material and the peripheral equipment using the cutting knife.
Peripheral equipment includes the following parts;
Lift paper machine
Stacking device for paper-breaking machine
Conveyor
Buffer stacking equipment
Automatic loading and unloading device (Transomats)
The lifting stacker of the paper table machine is used to lift the material to the height of the tabletop table, which is the ideal height for the operator to work. Here is a paper lifting table that is also said to be "fixed to the height of the cutter". It can be installed on the left, right or left and right sides of the cutter.
Independent free stop, movable stack lifting paper table machine, its lifting capacity can reach 1000 kg, it is equipped with a platform, and infrared grating shielding probe, can ensure that the material automatically lifts the material to the height of the tabletop .
Advantages: the speed of loading or unloading paper on the cutter with the lifting table of the elevator can be increased by 15-20% faster
Stacking device breaks through the paper machine:
Another requirement for precise cutting is that every printed paper must be aligned. Polar's stacking device paper-breaking machine can complete such material preparation.
Importance of cutting material preparation process In most cases, the printed material must be prepared before cutting, and should be done in the workshop outside the cutting machine and paper cutting machine. This can reduce the actual working time of the machine's paper cutter and paper cutter.
What exactly does the material preparation include?
Material preparation includes many processes, that is, paper stacking, quality control, and quantity quantification.
This preparation can be done online or online. It depends on two factors, application and time.
The quantity of paper is also part of the preparation work
It can be quantified by counting or weighing. For this purpose, the stacking device is installed on a pound scale. Weighing scales can be used to determine the weight. In addition, a connected scale can calculate the weight of the paper placed on the paper-breaking table. Refer to the ruler and count according to the paper thickness on the desktop. Then display the exact amount of paper.
Conveyor device The conveyor device connects the peripheral equipment with the cutter and paper cutter. They are designed in a modifiable system. They are designed in a modular system and can be adapted to specific size requirements. The pneumatic conveying device creates an air cushion under the material, which makes the material conveying more convenient.
Buffer paper stacking device If the stacking of paper and cutting are not synchronized in time, then you have to wait, so you need a buffer paper stacking device. The stacking process should be performed separately from the cutting process, so that the materials that break into the stack need to be temporarily stored in a certain place and then sent out later. Polar has solved this problem with a pneumatic plate system.
The pneumatic board system is next to the paper cutter, which accepts piles of paper. It is a supply station for cutters and paper cutters, and its top is raised to the same height as the desktop workbench of cutters and cutters. There is air supply underneath, forming an air cushion, which is very easy to transfer materials to the desktop workbench of the cutter machine.
Transmat is an automatic system that makes loading and unloading easier and more efficient. There are two models:
B type (Transmat B) is not used to load paper. Type E (Transmat E)-used for unloading and unloading paper.
Transomat B, removes the paper from the stack of paper stacks, and sends it to the rear table of the paper cutter (without manual) to the desktop of the cutter at the rear of the machine. The number of each stack of paper is accurately counted by a scale system of an integrated circuit. The number of each stack of paper is accurately counted by the Chip-Marker system.
advantage:
The operator can still perform continuous cutting operation while loading the paper loading process. There is no longer any need to do manual lifting, and the benzene of carrying paper is laborious.
After cutting, Polar Transomat E will automatically unload and unload paper from the high-speed cutter. The paper is removed in batches or batches and placed on the pallet automatically without any human interference without any manual intervention. The edges of the paper stack are still very neatly aligned, so that it can be processed for the next step, or it can be packaged and shipped directly.
In addition, the chipbreaker can also use the Chip-Marker system to mark a certain number of counted papers, bring the identification plate, and can be sent to the chopping station, where the ready-to-process papers to be cut have been piled up. .
All the peripheral devices described above are part of the Polar Cutter system. Users can choose according to their needs.
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