After the die-cutting blades, creasing steel wires, and glue pins are all pre-embedded, the production process of the die-cutting board moves on to the post-processing step of laser mold assembly, which involves opening connection points, bonding die-cutting strips, and installing reinforcement frames. The first two steps have actually been discussed. Here, we will focus on the design and installation of the reinforcement frame. Die-cutting processing factory
Open the connection point.
In die-cutting and plate making, opening the connection points is an essential process. The connection points are small openings of a certain width on the edge of the die-cutting blade. During the die-cutting process of cardboard boxes, the cardboard boxes and the waste edges are placed on the mold. Cutting the connected parts ensures that the cardboard boxes and the waste edges do not fall apart after die-cutting, facilitating smooth paper feeding and paper collection in the next step.
The opening should be made using a dedicated equipment connection point: a knife-line punching machine. Grind the connection point with a grinding wheel. Do not open the connection point with a hammer or chisel. Otherwise, the knife line and the lap joint corner will be damaged, and burrs are likely to form at the connection. Since the die-cutting knife is suspended on a bridge, do not open the connection point at this position.
The connection point widths include various sizes such as 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.8mm, and 1.0mm. The commonly used specification is 0.4mm, which should be determined based on the properties of the material being cut, such as fiber and thickness. good The connection points are usually placed in concealed areas that are not visible after the product is molded. The connection points on the appearance after molding should be as small as possible to avoid affecting the appearance of the finished product box. Die-cutting factory
Adhesive die-cutting strip.
After the die-cutting board is installed, in order to prevent the die-cutting and creasing lines from sticking to the paper during die-cutting and ensure smooth paper feeding during die-cutting, elastic die-cutting strips should be pasted on both sides of the cutting line. Die-cutting adhesive tape plays a very important role in die-cutting, as it directly affects the speed and quality of die-cutting. On different die-cutting machines, it is very important to choose die-cutting strips of different hardness, size, and shape according to the die-cutting speed, die-cutting operation, and related conditions.
Die-cutting rubber strips are categorized into standard, hard, and extra-hard types based on their hardness. Depending on the bonding location of the die-cutting rubber strip, it is necessary to select a strip of different hardness. Taking cigarette packs and medicine packs as examples, the recommended sponge specifications are as follows: For general locations, a 35° open sponge should be used. For sandwich steel molds, a 45° open sponge is recommended. For narrow areas, a 55° closed sponge is suitable. For connection points, a 60° arched sponge is recommended. In extremely narrow locations, a 70° solid rubber is used. The usage rule for sponges is: The height of the sponge should be as equal to its width as possible. Turn the smooth side of the sponge upward and secure it with a suitable glue. It should be 1.2 millimeters higher than the blade edge (typically using an 18-millimeter wooden board and a 23.8-millimeter knife for a 7-millimeter-high sponge). The sponge bonding position is generally 1 to 2 millimeters away from the knife, with the height adjusted accordingly for different hardnesses. The sponge should be evenly used across the entire page, and it should also be attached to both sides of the balancing knife, which should have the same density as the finished knife.
Install reinforcement boundaries.
During the use of die-cutting plates based on glued wood boards, there are often issues such as overall dimensional changes in the cutting die due to excessive pressure on the frame during plate loading, damage to the plate edges caused by repeated use, and warping and deformation during storage due to changes in temperature and humidity. To address this issue, a simple and effective solution is to design and install metal reinforcement frames on wooden die-cutting plates (due to cost reasons, this solution is generally only applicable to die-cutting plates such as cigarette packs and medicine packs). The following provides a brief explanation of the assembly requirements and design dimensions for the metal reinforcement frames.
1. The metal reinforcement framework is set up to cover three sides.
Due to the fact that the bite side is the stressed side (this side does not apply pressure directly) and the need for center positioning on this side, it is determined that there is no need and it is not convenient to accurately install a reinforced edge on this side. Therefore, the design of the reinforced frame is to wrap the remaining three edges of the die-cutting plate, excluding the bite side, with specially processed metal strips. It is required that the thickness of the wrapped die-cutting plate be consistent with the customer's equipment requirements. The thickness of the metal reinforced frame of the die-cutting plate should be consistent with that of the base plate. Before installation, the three edges of the base plate of the die-cutting plate should be milled. After processing, the edge section of the plate should be installed using flat-head screws with countersunk holes to lock the metal reinforced frame and the base plate. The installation effect is shown below.
2. Design dimension specifications for the metal reinforcement frame with three-sided coverage.
The design section of the reinforced edges on both sides of the plate and the design of the reinforced edges at the plate ends should take into account the plate locking slot.
3. Three-sided covered metal reinforced frame material.
The material of the metal reinforcement frame can be steel or iron, but from the perspective of saving processing costs, processing time, and installation convenience, it is recommended to make molds to batch-produce aluminum profiles, so as to facilitate material access at any time. Die-cutting processing factory