Various types of die cutting machines technology principle and application
Abstract: The die cutting machines is mainly used for die cutting, indentation and bronzing of corresponding non metallic materials, self adhesive, EVA, double sided tape, electronics, mobile phone protective film, etc. The print or cardboard is rolled and cut to a certain shape. How does a die cutting machines work? What is the working principle of a die cutting machines?
Various types of die cutting machines technology principle and application
Working principle of die cutting machines
The working principle of the die cutting machines is to use a steel knife, a metal mold, a steel wire (or a template carved from a steel plate), and apply a certain pressure through the embossing plate to roll the printed product or cardboard into a certain shape. If the entire printed product is pressed into a single graphic product, it is called die cutting; if a steel wire is used to press marks on the printed product or leave a bent groove mark, it is called an indentation: if two templates of yin and yang are used, it is passed to the mold. Heating to a certain temperature, hot stamping a pattern or font with a three dimensional effect on the surface of the printed product is called bronzing; if one substrate is used on another substrate, it is called lamination: excluding the rest except the genuine product is called bronzing. In order to discharge waste; the above can be collectively referred to as die cutting technology.
Die cutting creasing technology
With the development of society and the improvement of people’s living standards, when consumers buy goods, in addition to the inherent quality of the goods, they also put forward higher requirements for the packaging of the goods, including the design of the packaging and decoration of the goods, It also includes the requirements for the quality of packaging post press processing.
Die cutting creasing is an important production process in post press processing. It is suitable for finishing the surface of various printed matters. The quality of die cutting directly affects the market image of the entire product. Therefore, only by mastering traditional die cutting creasing technology and new The research and development of advanced die cutting technology can effectively enhance the competitiveness of printing enterprises. Die cutting and creasing technology is a general term for two processing technologies: model creasing and stencil pressing and cutting. fracture separation. The main parts of the die cutting cresing equipment (referred to as the die cutting machines) are the die cutting plate table and the pressing cutting mechanism. The processed sheet is in the middle of the two, and the finishing technology of die cutting is completed under the action of pressure. There are different types of die cutting and creasing models and corresponding press cutting mechanisms, so that the die cutting machines can be divided into three basic types: flat pressing, round pressing and round pressing. The flat die cutting machines can be divided into two types: vertical and horizontal because of the difference in the direction and position of the plate table and the platen.
Flat bed Die Cutting Machines
The shape of the plate table and the press cutting mechanism of this kind of die cutting machines are flat bed. When the plane of the plate table and the pressing plate are in the vertical position, it is a vertical flat bed die cutting machines. When the die cutting machines is in operation, the pressure plate is pressed against the plate by the transmission to exert pressure on the plate table. The different movement trajectories of the pressing plate can be divided into two categories: one is that the pressing plate swings around the fixed hinge, so in the first warm up period of molding, there is a certain inclination between the working surface of the pressing plate and the template surface, so that the die cutting plate can be cut in earlier. The lower part of the cardboard, which is easy to cause the phenomenon that the pressure on the lower part of the die plate is too heavy and the upper part is not fully penetrated. In addition, the component force of the die cutting pressure will also cause the lateral displacement of the cardboard. Another kind of pressing plate movement mechanism When the die cutting machines is working, the pressing plate is driven by the connecting rod and swings on the flat guide rail of the Machines base with the cylindrical roller as the fulcrum. When the position is reached, press it parallel to the cutting plate in a translational manner.
The vertical flat bed die cutting machines has the advantages of simple structure, convenient maintenance, easy to master its operation and replace the die cutting creasing plate, etc., but the labor intensity is high, the production efficiency is low, and the number of work per minute is mostly 20 30 times. Small batch production.
The plate table and the working surface of the platen of the horizontal flat bed die cutting machines are in a horizontal position, and the lower platen is driven by the mechanism to press upward to the plate table for die cutting and creasing.
Due to the small stroke of the horizontal flat bed die cutting machines, it is difficult to manually insert or remove the cardboard, so it is usually equipped with an automatic paper feeding system, and its overall structure is similar to that of a single sheet offset printing machines. It is composed of automatic input system, die cutting part, cardboard output part, electrical control, mechanical transmission and other parts, and some also have automatic washing device.
The horizontal flat bed die cutting machines is safe and reliable in operation, and has a relatively high degree of automation and production efficiency. It is an advanced model among flat bed die cutting machines.
Cylinder Die Cutting Machines
Cylinder die cutting machines is mainly composed of a reciprocating flat plate table and a rotating cylindrical pressure roller. During the working stroke, the plate table moves forward to advance, die cut and crease the cardboard; during the return stroke, the plate table returns backward, and the working surface of the pressure roller is not in contact with the die cutting plate. This type of die cutting machines can be divided into stop turn, one turn, two turn, etc. according to the different rotation conditions of the pressure roller in a working cycle. The positive and negative cylinder die cutting machines is a simple type, and its forward and reverse strokes can be It’s a work itinerary.
Rotary Die Cutting Machines
The working parts of the plate table and the pressing and cutting mechanism of the Rotary die cutting machines are both cylindrical. When working, the paper feeding roller sends the cardboard to the die plate cylinder and the pressure cylinder, and the two clamp it to the opposite side. The drum is die cutting, and the die cutting plate drum rotates for one cycle, which is a working cycle.
Die cutting methods of Rotary die cutting machines are generally divided into two types: cutting method and soft cutting method. The hard cutting method refers to the hard contact between the knife and the surface of the pressure roller during die cutting, so the die cutting knife is easier to wear. The soft cutting method is to cover the surface of the pressure roller with a layer of engineering plastic. During die cutting, the cutter can have a certain amount of cutting, which can not only protect the cutter, but also ensure complete cutting, but the plastic layer needs to be replaced regularly.
Due to the continuous rotation of the drum when the rotary die cutting machines is working, its production efficiency is the highest among all types of die cutting machines. However, the die cutting plate has to be bent into a curved surface, and the plate making is more troublesome, the cost is relatively high, and it is technically difficult. Therefore, rotary die cutting machines are often used in mass production.
At present, most of the advanced die cutting equipment is developing towards the fully automatic combination of printing and die cutting. The production line of die cutting machinery and printing machinery is composed of four main parts, namely the feeding part, the printing part, the die cutting part, and the sending part. Wait.
The feeding part intermittently feeds the cardboard to the printing part, which can be adjusted conveniently and accurately according to different forms, sizes and types of materials. The printing part can be composed of 4 color to 8 color printing units, and different methods such as gravure, offset, and flexo can be used. This part has more advanced printing functions and is equipped with its own automatic drying system. The die cutting part can be either flat bed die cutting or rotary die cutting, and both are equipped with a stripping device, which can automatically remove the corner waste generated after die cutting. The conveying part collects and sends out the products after the die cutting process is completed, so as to ensure that the printing part of the feeding part and the die cutting part can smoothly realize high speed continuous operation.
With the improvement of the technical level in recent years, the price of rotary die cutting equipment has been significantly reduced, and now it has a wide range of user groups in China.
Roll Sheet Die Cutting Machines
Roll sheet die cutting machines has rotary die cutting and flatbed die cutting. Flat bed die cutting type roll paper die cutting Machines is a Machines for die cutting and cresting from roll paper feed, in two ways: off line and on line. The off line processing is to use the printing machines to print the roll paper, and then put the roll paper that is rewound on the roll Machines to the die cutting machines feeder for die cutting and cresing processing. The characteristic of the off line processing method is that the printing Machines and the die cutting creasing machines have no connection and are not restricted by each other. The printing machines can be adjusted and printed with multiple die cutting Machiness to cooperate with the printing machines, or increase the start up time of the die cutting and cresing machines.
The in line processing method is that the die cutting Machines and the printing machines are connected to form an intermodal Machines, and the production is carried out with a printing and die cutting creasing process starting from the rolled cardboard. This method can reduce the number of operators, but generally the speed of the printing machines is high, while the speed of the die cutting and cresing machines is low. The speed of the two cannot be matched, so the speed of the printing machines can only be reduced. affected.
Linkege Line Die Cutting Machines
The so called on line linkege line die cutting mainly refers to on line flatbed die cutting and linkege Rotary die cutting. Inline die cutting has unmatched advantages over sheet fed die cutting machines. Some experts predict that it will become the mainstream of the die cutting equipment market in the next few years. On line die cutting is characterized by high speed and high precision, which can greatly improve production efficiency, shorten production cycle and reduce production costs.
The maximum speed of linkage line die cutting can reach more than 20,000 times per hour, which is much higher than that of sheet fed die cutting. Because the die cutting plate used is the same as that used for sheet fed flat die cutting, the manufacturing process is simple and the cost is low.
The linkage line circular die cutting machines is mainly used in the post press line of single variety and large batches. Its main feature is to carry out a series of operations such as hot stamping, stamping, die cutting, stripping, etc. on the printed paper roll, so as to process the printed sheet into the final product at one time. Linked circular die cutting avoids a series of quality problems such as surface soiling, inaccurate hot stamping positioning, and high rejection rate caused by multi pass post press processing, while reducing equipment investment and floor space, saving a lot of operators. , shorten the production cycle.
Although the linkage circular die cutting has some advantages that the flat die cutting does not have, the promotion and application in China are greatly restricted due to the high cost of the circular die cutting tool and the complicated manufacturing of the die cutting plate.
At present, the circular die cutting of the linkage line is only used more and more abroad.
