In the automatic production line of corrugated board, the setting of the preheater of the corrugated machine is very important. Even moisture. In order to ensure a good working condition, the preheater of the corrugator can keep the amplitude tension of the reel base paper and the single-sided corrugated board to achieve a good use effect, and can be adjusted and rotated arbitrarily.
In order to ensure the preheating of single-sided corrugated cardboard with different layers and structures, there are triple and quintuple preheaters.
In order to make the single-sided corrugated cardboard pass evenly and orderly, it is necessary to set up a paper bridge. Let the single-sided corrugated cardboard run under the control according to the specified track before combining. The paper overpass is mainly composed of rectifying part, transmission part, tension adjustment and control device. It makes the single-sided corrugated cardboard pile up in an orderly manner, which can properly evaporate the moisture of the single-sided corrugated cardboard, solidify and strengthen the adhesive strength of the adhesive. At the same time, when the single-sided corrugating machine stops for some reason, proper accumulation will not affect the production and operation of subsequent processes.
The gluing machine is a device that combines single-sided corrugated cardboard or multiple single-sided corrugated cardboard plus surface paper into three or more layers of corrugated cardboard by coating the adhesive agent. According to the processing structure of corrugated cardboard, the gluing machine is divided into single-layer (for three-layer corrugated cardboard), double-layer (for five-layer corrugated cardboard), three-layer (for seven-layer corrugated cardboard) and other gluing mechanisms. The gluing device is mainly composed of preheating roller, gluing roller, floating roller, pressure roller, paper guide roller, heat insulation board, pneumatic components, adhesive storage tank and other parts (as shown in Figure 15). In order to maintain the synchronization of the gluing machine in operation, its transmission is driven by the double-sided machine. When the gluing machine rotates without load, an independent motor runs through the reducer.
The function of the glue applicator is to apply glue evenly on the peaks of the single-sided corrugated cardboard. There are specially processed mesh pyramid pits on the glue applicator, which can save the amount of glue during work and apply glue evenly. In order to ensure better bonding quality, the working air pressure of the floating pressure roller controlled by pneumatic components should be guaranteed not less than 0.5MPa . It is required to maintain a good parallelism for the rubber coating roller and the rubber scraping roller, and the working gap between the two is 0.25--0.4mm.
When three-layer, five-layer, seven-layer or more corrugated cardboard is combined, it enters the drying, setting and cooling system. This system is the duplexer part. The double-sided machine consists of a hot section and a cold section. The main function is to fully evaporate the water in the corrugated cardboard, to solidify the adhesive, and to shape the corrugated board. The heating section is composed of several groups of hot ovens side by side, and the machine is smooth and smooth. The corrugated cardboard is directly attached to it, and the upper end face of the corrugated cardboard is added with a special canvas belt with good air permeability and a certain tension and gravity and a transmission pressure roller, so that the corrugated cardboard can be heated and dried under a certain pressure during operation. The heating section is further divided into a high temperature area and a low temperature area. The high temperature area makes the adhesive gelatinize and dry to enhance the cohesive force. The low temperature zone dries and stabilizes the corrugated board. The function of the cooling section is to dissipate excess heat, distribute water evenly, and avoid warping, so that the corrugated cardboard can smoothly enter the next process.