Paper cutting process management
Time:2024-12-09
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Printing requirements for paper cutting quality
1. Dimensional accuracy requirements of paper
For the same batch of live parts, the size of the paper used should be the same, which is also the need for normal separation of paper in the printing process, especially when printing thick cardboard, the hardness of the steel sheet used in the Feida part is larger, if the size of the cardboard used in the same batch of live parts is inconsistent, it is easy to cause paper feeding failure. When the paper is long, the separator nozzle can not pick up the first piece of paper from the steel sheet of the paper and appear empty phenomenon; When the paper is short, the steel sheet fails to reach into the pile of paper and scratches the second piece of paper sucked up by the parting nozzle, and there is a double sheet phenomenon. For the paper that is flipped before and after printing, due to the different paper edges of the former specified bits when printing the front and back, it is required that the size of the paper used in the same batch of live parts is highly consistent, otherwise the position of the front and back patterns on the paper will be uneven.
2, the front and side of the paper should be vertical
The front gauge edge and the side gauge edge of the paper should be vertical, otherwise in positioning, because the front and the front regulation plate of the paper are line contact, and the side and the side regulation plate are point contact, it is easy to appear contact deformation, resulting in inaccurate overprinting. FIG. 1 shows the paper with non-vertical front and side gauge edges.
3, the incision should be neat, no raw edge
When the knife is not sharp enough, the paper is prone to rough edges. The paper wool of the raw edge is easy to fall off and adhere to the rubber blanket during the printing process, which affects the printing quality, and the raw edge at the bite is also easy to affect the normal detection of the distortion detection mechanism and the shutdown phenomenon.
Printing requirements for paper cutting quality
1, in strict accordance with the specific provisions of the work instructions on the cutting process, cultivate the good habits of safe and civilized production, timely check the equipment, motor, knife edge, switch and brake sensitivity.
2, cutting should pay special attention to the cutting Angle, must ensure that the vertical, the size of each stack of paper should be consistent, a pile of paper up and down in a straight line, the incision is neat, no knife flowers, breaks, sliver, path and fuzz and other phenomena, the lower paper should be cut through, not dirty, not broken.
3. Ensure the accuracy of cutting quality, cutting size and finished product size. After the finished paper is cut, it should be stacked separately according to different parts, indicating the name of the printed part or the print number to avoid confusion, and sent to the machine on time to ensure the printing time.
4, in the handover with the material department, to carefully count the number of received.
5, ensure the normal operation of the paper cutting machine, the equipment does not have "disease" operation, according to the regulations and equipment instructions, regular maintenance of the equipment.
6, the cutting product should be graded, among which, the size meets the requirements, the finished cutting square, no knife flowers, knife marks, the error is not more than ±1mm, for the superior product; The size meets the requirements, the finished product has no obvious knife flowers and knife marks, and the cutting error does not exceed ±1.5mm, which is a good grade product; The size basically meets the requirements, and the cutting error of the finished product is not more than ±2mm, which is a grade product.
7, paper wrapping paper should be carefully collected, stacked, and arranged according to size.
8, if the humidity of the production workshop is lower than the production standard requirements, the cut paper must be covered with plastic wrap.
9, keep the surrounding environment of the paper cutting machine clean, no cutting corner material, paper scraps, debris, pay attention to whether there is oil under the press rod and the paper push, whether the paper table is wet and rusty, whether there is nail head wire and other hard objects, so as to avoid scratching the knife edge. The equipment and spare knives used for cutting paper should be carefully managed and placed safely. Sharpening and blade replacement records should be detailed and accurate.
Operating procedures for paper cutting processes
1. In the preparation stage, the monitor (captain) shall check the types, specifications and quantities of paper according to the requirements of the production task list, accurately understand the technical requirements such as the cutting size of the product, and inform the team members.
2. Switch on the power supply of the paper cutter during the operation stage, check the electric eye, motor sound, move the paper cutter to see if there is any abnormality, and make the actual working value of the paper cutter consistent with the value displayed on the screen of the paper cutter, such as the actual cutting size consistent with the display size. After all is correct, according to the size of the paper to be cut, try to move the paper pusher, determine the position of its moving before and after, and then put the collided paper on the work table, and make it close to the paper pusher and side stop gauge, according to the requirements of the task list to smooth the four sides of the paper; Push the paper pile to the specified cutting line with the paper pusher, put down the paper press to press the paper pile, position, cut the knife down, start cutting, after the cutting is completed, rise away from the paper pile, then the paper press also rises, return to the original position; The cut paper should be clearly marked and transferred to the next process.
Rewards and punishments for paper cutting processes
1, cutting personnel because of careless work, resulting in printing quality accidents, by its bear 30% of the paper cost.
2. When cutting personnel do not seriously understand the task list, cutting errors occur, which constitute paper scrapping, the loss caused by it shall be borne by 100%.
3. When the cutting personnel receive the materials, it is found that the material department has sent the materials wrong (paper variety, quantity, size, etc.) without causing cutting losses, the shift director will count the live parts into the day‘s production and reward the cutting personnel to improve the enthusiasm and responsibility of the cutting personnel.
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Anna Zhang