Folding machine can be divided into knife type folding machine, fence type folding machine and grid knife hybrid type folding machine from the structure, because the grid knife hybrid type folding machine has both knife type folding machine and fence type folding machine The structure of the folding machine is taken as an example to introduce the basic structure and performance of the folding machine.
The grid knife hybrid folding machine is mainly composed of a paper feeding mechanism, a fence folding mechanism, a folding knife folding mechanism, a paper collecting mechanism and an electric control system.
One. Paper transport mechanism
The paper feeding mechanism is mainly divided into two types: flat sheet pile paper feeding device and continuous paper feeding device.
Flat sheet stacking and conveying devices are most widely used in China. The structure of its automatic lifting platform type paper conveyor is divided into a paper separation system (Feida), a paper table lifting system and a paper conveying bridge system. The paper feeding method of this structure has a wide adaptability to printed sheets, stable paper feeding, and a range of 40 to 200 g for printed sheets, and a small area, but the disadvantage is that the printed sheets need to be shut down and reloaded before working.
The continuous paper feeding device is also called a single-sheet rotary paper feeding mechanism. This mechanism is equipped with a scale-type paper feeder. There is no need to stop the paper when it is loaded, which improves the working efficiency. The paper weight is 40 ~ 180g, but this device accounts for The area is large and it takes time to adjust.
two. Fence folding mechanism
The fence folding mechanism is a mechanism that uses the fence to cooperate with the relative running folding roller and steering baffle to complete folding. It is mainly composed of folding rollers and folding fences, and has a manual stepless speed change device.
1. Folding roller
The folding roller is an important part of the folding machine. Whether it is a fence folding machine, a knife folding machine, or a hybrid folding machine, the folding roller is an indispensable core component, and the folding accuracy is mainly controlled by the folding roller accuracy. The higher the accuracy of the folding roller itself, the higher the folding accuracy. After the printed sheet is sent out by the folding roller, it will pass through the part of the paper conveying roller, where the paper can be punched, slitted and creasing.
2. Folding fence
Folding fence is also one of the main components of folding machine, its accuracy directly affects the folding accuracy. Folding roller transmission gear, rubber roller shaft seat, needle roller bearing are the main components of the fence folding mechanism. In order to ensure transmission balance, most folding machines use helical gears for transmission. The accuracy of the rubber roller shaft seat can affect the parallelism of the two adjacent folding rollers, thereby affecting the folding accuracy. Most manufacturers use needle roller bearings for positioning at the two shaft ends of the folding roller. The characteristic of the needle roller bearings is rotation balance. The quality of the needle bearing can directly affect the folding accuracy. If the bearings at both ends of the folding shaft rotate unbalanced, the folding roller will inevitably jump and reduce the folding accuracy.
3. Continuously variable transmission
The stepless speed change device is a device specially equipped by the mechanical knife folding machine for adjusting the size of printed sheets. This device is mainly to adjust the relationship between the folding knife frequency and the folding roller speed to adapt to different sizes of printed sheets.
three. Folding knife folding mechanism
The folding and folding mechanism uses a folding knife to press the printed sheet into a pair of relatively rotating folding rollers, which are then sent out by the folding rollers to complete a folding process. Folding knife folding mechanism is mainly composed of folding knife, folding roller, folding roller cover plate, and regular components. Folding knife and folding roller are the main components of the structure. The straightness of the folding blade edge affects the accuracy of the lower hole punching. The accuracy of folding roller cover and rules also directly or indirectly affects the folding accuracy at the folding knife.
The driving method of the folding mechanism is divided into mechanical driving and electronic driving. The mechanical drive is generally called a mechanical knife, which uses the cam to drive the guide rod to move up and down along the fixed slide, and drive the folding knife to complete the folding; the electronic knife is driven by the electrical components and the mechanical driving folding knife to complete the folding. Electronic knife is divided into electromagnetic clutch control and servo motor control. Because the mechanical knife is driven by a cam, it is not suitable for high-speed folding due to the impact load when the machine is moving, and the noise is also greater at a slightly higher speed. The electronic knife is suitable for high-speed folding because it is not affected by the impact load, and the noise It is also small, because the servo motor is superior to the electromagnetic clutch in all aspects of performance, so the electronic knife folding machine installed with the servo motor is better than the electronic clutch folding machine controlled by the electromagnetic clutch.
four. Paper collection mechanism
The take-up machine adopts a movable take-up trolley. The take-up trolley can adjust the height and angle according to the folding style, and has an independent stepless speed regulation function. The folding machine can be adjusted according to the folding speed.
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