Rewinder mechanical structure and control process ---
Second, the main structure of the winder
2.3 Rolling Department
1. Stretching device
The stretching device of the rewinder is set to keep the paper web slit after slitting. In some paper cutting knives, the stretcher is also used. The main function is to eliminate the texture and slack of the paper web. Mainly, it can maintain the good operation of slitting. There are three types of stretchers that we often use today: D-shaped stretches, curved rollers, and Z-type double-bar stretchers.
2, support roller
The backup roll is mainly used to support the paper roll, which is composed of a controlled cast iron roll or a general tube roll. The roller body is mainly cast iron pipe and steel pipe, and its diameter is usually 400-700 mm or more according to the width of the winder. The center-to-center ratio between the rolls of the backup roll should be greater than the roll diameter. Only at such a distance, the roll core does not get caught in the middle of the roll when the support roll begins to curl.
When the winder is running at high speed, in order to avoid vibration during high-speed operation, the design of the backup roller must be minimal when supporting the paper roll. The radius is a function expression of the speed and width of the winder, mainly by allowable The critical speed and the degree of winding are determined because at this time the diameter of the backup roll has less chance of producing a defect in the roll hardness than the small diameter support roll. When coiling coated paper or very thin paper, we should consider using a larger diameter backup roll. On a rewinder with a small width, we generally use a 600mm roll diameter.
Design and application of constant tension and load distribution control for winder---
4 Research significance and content
Due to the application and development of frequency conversion technology and computer network technology in the field of industrial control, the establishment of AC drive control system based on field bus has become an effective way to solve the above shortcomings and limitations. Taking PLC as the control unit, the inverter is the execution unit, and the OP operation panel is the operating unit to form the all-digital field bus rewinder AC rotation control system. Based on this assumption, in order to reduce the investment, the original mechanical part and hydraulic part of the system are basically maintained, the original DC rotating system is transformed into an AC rotating system, the solenoid valve and some worn mechanical parts are replaced; and the OP270 man-machine interface is used instead of the machine. Buttons and analog meters, and a part of the mechanical buttons, so that workers can operate on the OP270 or on the console buttons, complement each other, increasing the flexibility of operation.
Belt rewinding machine design and working principle ---
14 change roll
The roll change blower is used to blow the cut sheet onto the core. On the platen roller, there are three blowing tubes on the paper core with a blowing tube under the paper core. When blasting is used, the paper will bypass the core at the beginning of the machine.
15 paper cut hair dryer
The web cut blower is used when the web must be cut quickly. The blow tube is located between the guide rollers.
The blow tube is activated by a safety photocell or a manually transmitted pulse signal.
1- Spreading roller
2- Adjust the paper wrap angle device,
3- Stretch roller bending direction adjustment device
A- paper web
B- First stretch roll bending direction
C- second stretch roll bending direction
The stretching device on the illustration is the basic position of the display. The web A passes directly through the spreader roll, which means that the web curvature is zero. The first spreader roll B is at an angle of 90 degrees with respect to the sheet. The second spreader roll has a camber at the base position when the cylinder pressure is 0 bar. The cylinder pressure can be read on the meter at the location of the control system.
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