The technology and principle of glue coating machine

The technology and principle of glue coating machine

The technology and principle of glue coating machine

Nov 23,2021

skills requirement
The performance of the gluing machine not only affects the glue quality of the veneer, but also determines the amount of glue used and affects the production cost of the plywood. Therefore, there are the following technical requirements for the roller glue applicator.
1) Improve the uniformity of gluing on the entire web of the veneer. The specific measures are as follows:
(1) Ensure the manufacturing and installation accuracy of the parts of the glue applicator. Such as ensuring the full runout of the working surface of the rubber roller and the rubber roller to the axis, the parallelism of the upper and lower rubber rollers, the parallelism of the rubber roller and the rubber roller, etc.
(2) Appropriately increase the diameter of the rubber roller.
(3) According to different types of rubber, the rubber covered by the rubber roller adopts different hardness, and the groove on the surface of the roller adopts different shapes and sizes.
2) In order to adapt to veneers of different thicknesses, the distance between the upper and lower glue rollers should be adjustable, and the thickness of the glue layer should be easy to control and adjust. The thickness of the glue layer is mainly determined by the gap between the squeezing roller and the glue roller. The adjustment accuracy of the gap should be controlled at about 0.01mm, and the amount of glue is usually controlled within the range of 105-430g/m2.
3) Improve the wear resistance and rust resistance of the parts of the gluing machine, and install necessary safety protection devices to increase the life of the gluing machine and ensure safe operation. 
working principle
1) Double roller glue applicator.
Its appearance is shown in Figure 1. The double-roller glue applicator is mainly composed of upper and lower glue rollers and glue tanks. The lower part of the lower glue roller is immersed in the glue tank, and the glue liquid of the upper glue roller is transferred by the lower glue roller. When the veneer passes between the two glue rollers, it contacts the glue roller so that the glue on the roller is coated on the upper and lower surfaces of the veneer. The amount of glue applied mainly depends on adjusting the gap between the upper and lower rubber rollers and the pressure of the upper rubber roller. The thicker and narrower the veneer, the greater the pressure of the roller on the veneer, the smaller the amount of glue applied; on the contrary, the larger the amount of glue applied. The shape and number of grooves on the roller also affect the amount of glue applied. The height of the glue liquid level in the glue tank should reach 1/3 of the diameter of the lower glue roller, too large or too small will affect the amount of glue.
glue coating machine