Differences in the process of the most popular cor

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The differences of corrugated board printing machinery process

corrugated board and multi corrugated board are made by corrugated machinery with different specifications and sizes. They have common ground, that is, the same principle and the same operation mode. It belongs to pit machine and wave machine, but it has differences. This difference is generally the difference in comparison, that is, the size of the wave pit is high and low

take a paper company as an example, a wave has 113 teeth, and b wave has 151 teeth in cooperation with the industry. Generally, the height of a wave pit is about 4.5mm, and that of B wave pit is about 2.5mm. This difference has changes in operating strength, operation and mechanical and physical properties. For example, the supply relationship of heat, the force changes of mechanical operation, and the formation of the scale standards of benign processes. There are differences in the process of the formation of various processes. With the mediation, elimination and upgrading of people's economic tension and household property, such as aerospace, national defense, kerosene chemical industry, transportation and so on, the scalar scale of mechanical processes has changed with different forces

there are basically the following differences in terms of the influence of mechanical process appearance, performance, raw material stress, heat supply and paste on quality: the difference of appearance, hearing and sound; Change of working frequency of vibration; Motion force, size difference; The ratio of heat supply; Effect of paste on wave surface. These are caused by mechanical differences. The changes of mechanical process differences are the influence of the physical properties of the forming process

appearance sound

in the process of manufacturing, from the appearance, the sound of normal speed B car is crisp and symmetrical, high-speed sharp and buzzing, the work of normal speed a wave is dull and deep, and the high-speed roar is like thunder, which is the phenomenon of amplitude, frequency and amplitude changes in acoustics and the response of vibration frequency changes. This response has a certain relationship with corrugated vibration and corrugated force. According to work experience and acoustic characteristics: it can determine whether the paper is broken; Speculate whether the compression of each part is normal; Judge whether the mechanical fault is normal or not. This is the relationship between mechanical force and sound. First, the paper break has changed the current situation of force changes, and the mechanical load is reduced, resulting in the acceleration of running vibration. The a wave is as sudden as thunder, not in the vision. Generally, the paper break occurs first in the ear and then in the eye, and the sound startles the mind and moves; The second is whether the mechanical pressure, tension and stress of each part are normal, which often has a response in sound. This response is relatively subtle, and it is generally felt by habit. If the pressure on the bottom wheel is too heavy or the clearance is too small, the mechanical force has a slight change in sound. If the sound becomes uneven, dumb and heavy, you can be familiar with sound discrimination in debugging; Third, there is mechanical failure. Of course, there is abnormal sound, which is different from paper breaking and overweight under pressure. This abnormal sound is often easier to detect

difference in working frequency and amplitude

the number of teeth of B wave pit and a wave pit is obviously different, and the working vibration frequency also varies accordingly. This is the origin of the difference in sound appearance, as well as the board of corrugated paper forming. This is a function of mechanical technology and setting. This kind of corrugated vibration and amplitude has the following working significance: set their respective wave distance and wave height functions; Set the function and ratio of the ridge; Distribute the application ratio of pressure resistance, ring pressure, cracking, etc. of formed paperboard. Due to the difference in the specification distribution between wave a and wave B, the paper with the same raw material has different pressure resistance and fracture distribution values due to different mold specifications

working operation change difference

there is an objective specific function setting for a groove and B groove. At the same time, the setting of this function has the change and size difference of working force in the operation. This appearance process is shown in: car B starts and accelerates quickly, while car a starts and accelerates slowly. In comparison, there is a problem that the equal acceleration positive pressure rate of car B is small, and the acceleration positive pressure rate of car a is large

analysis: compared with car a, car B has differences in the size and height of the teeth

mechanical analysis:

1) car B has small teeth, shallow bite, large power arm, and small force in the process of making the ridge

2) a has large teeth and deep bite, which requires relatively large torque in the process of corrugated making, that is, the force arm is small

3) the wave distance of car a is large, and the wave distance of car B is small. Due to the impulse and aerodynamic properties, car a has large elastic potential energy and touch that is expected to achieve export sales at the same speed, so there is a large positive pressure at the same speed. Compared with the same speed, this elastic potential energy and contact force have the following effects under the same conditions: the paper pressure of car a is relatively large, and that of car B is relatively small; Due to the relationship between force and reaction, car a is prone to vibration and rebound, resulting in delamination. The so-called resonance phenomenon. Vibration anti elastic degumming: under the condition of mechanical operation, there is a certain amount of contact and rebound potential energy between the upper ridge wheel and the middle ridge wheel, and between the middle ridge wheel and the bottom wheel. This kind of elasticity is excessive and lacks restriction. In the mechanical process fitting, due to the effect of vibration, it is easy to form opening and closing phenomenon, resulting in open layer blistering, forming instant contact between the ridge wave and the veneer, and producing process effect in the form of vibration, That is the so-called resonance phenomenon. Because the mechanical operation is pneumatic positive pressure, the interval continuity is formed, which generally has the following phenomena, which is more likely to occur in car a. 1) Large mechanical wear and bearing wear; 2) The brake of the adhesive backing paper is too tight, which restricts the pneumatic positive pressure, or the bottom wheel slips and lacks working friction; 3) The paper range is narrow, the contact surface is small, it is easier to swing by vibration, and the reverse effect restricted by braking is greater. For papers with wider and thicker paper doors, it is easy to form a stable and buffer force, which is relatively difficult to happen. Car B bears little force, which is relatively difficult to happen. In the process of running manufacturing, due to the different mechanical design of each corrugated wheel, the physical and mechanical properties and changes formed are also different. Corrugation wheel binding and corrugation often cause resonance rebound and layer opening. Unilateral increasing the pressure of the bottom wheel usually has no effect, but can only be achieved by reducing the resonance effect, such as reducing the reverse force and braking force, and reducing the locomotive speed. Because the force of car a on paper and machinery is greater than that of car B, car a needs to operate various papers, and the relative tension is reduced. The resonance can be suppressed by pressurization, that is, the force operation adjustment. If the positive pressure increases, as long as it reaches a certain pressure limit, its reverse force also increases, it can not fundamentally solve the resonance phenomenon, but will only increase the occurrence of this problem. It can only be adjusted by the balance arm of the movement force. There is a difference between car a and car B, that is, there is a difference in the operation force adjustment

difference in heating ratio of materials

b locomotive runs at the same speed, the materials are the same, and the preheating area of the surface paper is the same, but the heating rate of the core paper is different: it can be seen that due to the different distribution values, the speed of the core paper of car a is fast, and the heating rate of the core paper is lower than that of car B; With the same heat supply, the corrugated area of car a at the same speed is larger than that of car B, and there is a relatively large heating surface, which is inevitable due to the setting of mechanical function. Generally, the high speed of car a cannot be higher than that of car B in terms of effect. In addition to the influence of force and force, the thermal conductivity effect and mechanical design effect correspondingly inhibit the speed and effect of locomotive manufacturing products

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