How to improve board quality through intelligent control?
○ The designed maximum operating speed of the three types of glue applying machine is 200 m/min, 250 m/min, 300m/min.
○ The glue roller and meter roller adopt modular and built-in design, they can be installed and removed from the operation
side to facilitate repair and maintenance.
○ A pressure arm locking mechanism is provided to ensure stable and reliable operation performance of paper pressing
roller (touch pressing plate) under high-speed operation state.
○ The gap between the glue roller and the meter roller can be automatically adjusted according to the speed, paper material
and flute type.
○ The touch pressing mechanism for glue application is a paper pressing roller, and the gap between the paper pressing
roller and the glue roller can be adjusted electrically to facilitate rapid changeover for processing cardboards with different
flute types.
○ The glue pan is lifted pneumatically to facilitate cleaning. There are glue blocking plates installed at both ends of the glue
pan to well prevent glue from splashing from the shaft ends during high-speed operation of the glue roller and meter
roller.
○ Layered independent frequency conversion motor, synchronous belt transmission and relatively independent control
are used in the power part to ensure the precision of transmission and to greatly reduce the vibration and noise during
operation.
○ Layered independent adjustment and touch panel man-machine interface control are employed, so the adjustment and
control are more flexible and direct viewing.
○ The floating roller of the pre-heating cylinder is electrically adjustable (this function is optional to users) to facilitate paper
passing through and adjustment of angle of contact.#Paper board production line
1.Flute collapsed after glue application is the most common problem of a gluing machine
When corrugated paper passes between the rubber roller and the riding wheel of the gluer, the riding wheel flattens the gummed corrugated paper, which means that the operator fails to adjust the gap between the rubber roller and the riding wheel in time.Due to the structure of the order, in the production of cardboard base paper basis weight (g) is different, the thickness of the paper is also different, so is the thickness of corrugated paper. Timely and accurately adjust the clearance between the riding wheel and rubber roller, can have certain difficulty for operators, at the same time, the operator worries about cardboard degumming more than that of cardboard crushed, so it will lead to the cardboard quality defects.#cardboard glue system
In practice, the gap between the rubber roller and the riding wheel will be less than the thickness of the board, the cardboard will have a certain degree of load deformation damage, resulting in cardboard edge pressure and physical properties of the decline.#glue kitchen
▲Glue unit
The most important core of gluer is the configuration of gluing structure.#Corrugator Plant
Gluer is also called glue-application machine, the most important core is the configuration of gluing structure.The gluing structure is divided into:
1. Structure of contact roller
There are three forms of wheel structure: manual adjustment, automatic adjustment and follow-up adjustment.
(1) Manual adjustment: manually adjust the gap between the rubber roller and the riding wheel.Advantages: load and glue is steady, not easy to degumming. Disadvantages: the clearance is not easy to adjust accurately, easy to crush the cardboard.#Duplex Gluer
(2) Automatic adjustment: automatically adjust the gap between the rubber roller and the riding wheel.
[Detecting type of corrugated paper] through detecting corrugated paper sensor, the clearance control is automatically adjusted.The disadvantage is that it needs to check whether the clearance position is accurate;Intelligent detection point/line;When the corrugating roller is worn, the error is large;The control is complicated and the cost is high.
[Testing the loading type of the upper roller]Automatically adjust the control of the gap between the upper cots by testing the loading of the upper cots.The advantage is that the paperboard load is steady, will not crush the paperboard.The disadvantage is the high cost.#Corrugated Auto plant
(3) Follow-up adjustment: automatically adjust the gap between the rubber roller and the contact roll according to the change of the weight of the cardboard.
Its structure is: contact roll is mobile, different grams of paper through the base, the same pressure on the riding wheel, achieving contact roll glue optimization.The advantage is the paperboard load steady, will not crush the paperboard;Simple structure and low cost.#Corrugated Cardboard Production Line
1. Platen Structure
This structure is the use of spring automatic adjustment, pressure can be automatically adjust if paper and flute shape changed, so as to avoid flattening cardboard.#Corrugator line
Advantages and disadvantages of platen structure:
Advantages: simple structure, low cost.
Disadvantages: high requirements for installation, unstable load and gluing, easy wear of the pressure plate.
The automatic matching speed of the gluer can improve the quality of the board.
If the same roll on the gluer needs to apply glue for corrugated cardboard with different flute shape, you need this. Because of the different flute height, linear speed is different, the speed of the rollers is different, and the speed of the flute tip should be equal to the linear speed of the rollers.#Triple Gluer
At present, most gluers in China do not have this.
Gluer equipped with slurry board is also conducive to improving the quality of cardboard
Another concern in configuring the gluer is the slurry plate baffle, also known as the slurry baffle.
Have slurry board, when the paper web of corrugated paper is larger than the linerboard, the glue of flute tips on both sides of the corrugated board will contact the surface of the hot plate, accumulated hard block, wear and tear large belt and stick to the big belt extrusion board and produce indentation affect the quality of cardboard printing.
At the same time, because the upper cots are half immersed in the plastic plate, both ends of the upper rolls are easy to throwing the glue, resulting in waste, and the slurry baffle plate structure is simple, low input can solve the above two problems.
2.Automatic gluing control system to improve the quality of cardboard
In the production process of corrugated board, in the premise of ensuring the cardboard adhesion, the less glue the better.If the amount of glue is large, it is easy to cause:
· cardboard quality decreases;
· cardboard strength is not up to standard;
· board thickness is not up to standard;
· the surface quality of the linerboard is not good, and the surface is exposed;
· corrugated edge wrinkled;
· cardboard warping;
· decreased speed and production capacity;
· large glue consumption and economic loss.
Traditional electrically controlled glue control requires manual control of the gap between the scraping wheel and the upper rubber wheel, so as to control the thickness of glue.Generally need operators according to paper and corrugator speed manual adjustment, the disadvantages are frequent and not easy to adjust quickly.
The use of automatic glue control system is to achieve in different speed, different paper, corrugator production system can automatically adjust the amount of glue.The automatic glue control system is helpful to reduce the amount and consumption of glue. It can also reduce scrap cardboard caused by human error, reduce the original paper waste caused by broken glue.
Automatic glue control system setting parameters are in PLC, according to the speed and glue formula, according to the set thickness of glue coating automatically adjusted.The disadvantage of automatic glue control system is that although it greatly reduces the workload of manual operation, packaging enterprises should set parameters according to the actual production needs.
The central automatic control mode of the glue control system, its PLC can automatically calculate the thickness of paper based on the paper and speed in the production control system, while automatically adjusting the paste cutting clearance, and the riding wheel clearance. It can also automatically fine-tuning the amount of glue based on the other parameters (such as temperature) on the Corrugated Line. At present, the technical strength of the equipment suppliers, its corrugated line equipment configuration of the central automatic control mode glue control system, not only can achieve the Single Facer glue usage control, and each corrugated type is equipped with a set amount of glue curve, and according to the different base paper material with glue offset set .In addition, it can also automatically match the speed of the rollers according to the corrugated type, so as to obtain the best gluing effect.
Comparison of advantages and disadvantages of several gluing control systems
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