The automatic control system of the auto die cutting machine adjusts the air pressure of the cylinder through the proportional valve. The cylinder pushes the friction plate against the fixed steel ring. The air pressure of the cylinder directly controls the friction between the friction plate and the steel ring, so that the tension of the unwinding paper is regulated in a closed-loop to keep the tension consistent.
During the production process, when we have finished matching the materials, we need to receive the die to install the knife. When the first step is to receive the die, we need to receive the die according to the drawings and material numbers. In the process of receiving the die, we must remember that we need to correctly compare the material number and tool number so that the tool can be received correctly. We cannot receive dies based on product shape alone. There are too many similarly shaped product knives in large die-cutting plants. At the same time, there are several new and old sets of knives used in the same product. Once the wrong knives are received, they will be found during production, which has already caused a great waste of materials.
After receiving the die, we need to fix the received die on the template of the auto die cutting machine. When fixing, we need to strictly compare with the operation instructions in books to confirm it is a lower punching or an upper punching die. If it is the upper punching die, it needs to be fixed on the lower die plate. If it is a lower punching die, it needs to be fixed on the upper template. When fixing, we usually use double-sided tape with higher viscosity and thinner thickness for fixing. When choosing double-sided tape, remember to use double-sided tape with high viscosity and good stability (usually 3M tape) to prevent the die from falling off during the punching process.
When fixing the die, it is not just about fixing the tool. During the fixing process, we must ensure the verticality of the die and the feeding direction of the machine, and ensure that the die is kept perpendicular to the feeding belt during punching.
After fixing the automatic die cutter die, we need to fix the backing plate. The main function of the backing plate is to protect the direct contact between the blade and the template, reduce the damage of the tool and improve the service life of the tool. The backing board is generally made of PVC board or PE insulation board with a thickness of about 1mm. The general use area of the backing plate should be greater than 5mm on each of the four sides of the tool base plate. The backing plate is fixed on the template and it is advisable to take one side of the feeding direction to fix it. Some die cutting masters are used to pad two pads when starting up, mainly for the convenience of adjustment.
The adjustment of the pressure here mainly refers to the adjustment of the depth of the die cutting die base. After we install the tool, we need to adjust the pressure of the die base to check whether the die can effectively punch the material. In the process of pressure adjustment, it is strictly forbidden to directly perform single-action or linkage punching, and the equipment must be adjusted to the manual gear for testing and adjustment. When the die base is adjusted to the current maximum stroke and the material cannot be effectively punched, the pressure adjustment should be carried out to test again. When the die seat is adjusted to the maximum stroke and has been punched to the lower die seat, it means that the die seat pressure is too deep and the pressure should be reduced to test again.