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Die-cutting process is a process most commonly used for packaging tape. It uses a die-cutting knife to form a die-cutting plate according to the pattern of product design requirements. Under the effect of pressure, the tape or other plate-shaped blank is rolled into a desired shape or Cutting process. Indentation process is the use of knife or pressure line die, through the role of pressure on the sheet material extrusion line marks, or use the roller to roll out the line marks on the sheet material, so that the sheet material can be bent at a predetermined location .
Usually the die-cutting indentation process is a combination of a die cutter and a wire cutter in the same template, and the die-cutting machine is simultaneously subjected to a process of die-cutting and indentation processing, referred to as die-cutting.
The main process of die-cutting is as follows: upper plate → adjust pressure → determine distance → paste rubber strip → pressure test die cutting → formal die cutting → stripping → finished product inspection → point packaging
Upper edition
First, proofread the die-cut version that has been made, and roughly observe whether it meets the requirements of the design draft. Whether the position of the steel wire (crimping knife) and steel knife (die cutter) is accurate; whether the incision of the slotted hole adopts the complete line, and whether the line turns at the corner; for the sake of facilitating the elimination, adjacent narrow edge waste Whether the connection has increased the connection part and connected them together; whether there are sharp angles at the joints of the two lines; whether there is a case where the sharp line ends at the middle of another straight line. Once the above issues arise in the die-cut version, the plate-making personnel should be notified immediately to make corrections to avoid more time wastage. Then, the prepared die-cut version is installed and fixed in the plate of the die-cutting machine, and the position of the good version is initially adjusted.
Adjust pressure, determine rules and paste rubber plugs
Adjust the layout pressure, first adjust the pressure of the steel knife. After padding, first press the print several times to flatten the steel knife, and then use a cardboard larger than the die-cut layout to test the pressure. According to the marks cut by the steel knife on the paper board, gradually increase the pressure by using the partial or all. The method of reducing the number of backing paper layers makes the pressure of each cutting line of the layout uniform.
In general, the steel wire is 0.8mm lower than the knife line (because the corrugated paperboard has different types of corrugated paperboard, the thickness of the paperboard has a large gap and should be adjusted according to the actual situation). To make the steel wire and steel knife get the ideal pressure, it should be based on the die-cut cardboard. The nature of the adjustment of the pressure on the steel wire. The thickness of the liner is usually calculated based on the thickness of the die-cut cardboard, ie, the thickness of the liner = the height of the steel blade - the height of the steel wire - the thickness of the cardboard being die-cut.
Remark: After the plate pressure is adjusted, fix the die plate. When determining the position of the rule, it is generally best to center the die-cut product.
The rubber plug should be placed on the two sides of the main steel knife of the die-cutting plate, and the separated cardboard should be pushed out from the edge using the good recoverability of the rubber elastic bar. Generally speaking, the rubber band should be about 1.2mm higher than the cutting edge, and the distance from the rubber line to the cutting line should be 1mm to 2mm, because if it is only installed by the blade, the rubber cannon cannot expand in the direction of the blade after being pressed. Can be inflated in the other direction, causing the paper to be pulled on both sides. The die cutter has not cut the paper and has been broken by the rubber stopper. It is easy to produce paper.
Pressure Die Cutting, Formal Die Cutting, Stripping, Finished Product Inspection, Point Packaging
After the above work is completed, proofs should be die-cut first, and a comprehensive inspection should be conducted to see if the indicators meet the requirements. After the full-time inspection personnel confirms the sample, mass production can be carried out.
During the production process, operators should perform self-tests from time to time. It mainly compares with sample proofs to see if there are any problems and solve them in time. For die-cut products, excess edge material should be removed, and the burr edges should be polished to make it smooth and free from burrs. Afterwards, the finished product was selected for inspection, defective products were removed, and the final number, packaging, acceptance, and storage were completed.
In the packaging tape industry today, various precision die-cut tapes are used in the form of coils in response to special requirements such as automobiles, mobile phones, electronics, and electrical appliances.