1. Adhesive quality
It is manifested in several aspects such as the performance of the synthetic resin adhesive for glue, the coordination of each component and the glue mixing process. In recent years, a lot of research work has been done on the components of plywood glue and the glue mixing process, which not only saves a lot of chemical raw materials, reduces product costs, but also improves product performance, which is a manifestation of technological progress. In the production, only the synthetic resin used has excellent performance, sufficient bonding strength, reasonable distribution ratio of each component of the adhesive, stable performance of the prepared adhesive, suitable resin content and viscosity, and a long enough active period to ensure normal operation and products. The indicators meet the requirements.
2. The quality of the veneer
The quality of the veneer, especially its surface state, has a great influence on the bonding strength. The quality of the veneer should be paid enough attention in the preparation of the wood section and the process of the veneer rotary cutting. The wood softening treatment should be carried out well, and the rotary cutting conditions should be controlled so that the various indicators of the veneer are at the best value. At the same time, attention should be paid to the moisture content of the veneer. rate and flatness.
3. Plywood gluing
Before the glue pressing, attention should be paid to the two links of the amount of glue applied and the aging of the slab. If the glue amount is too large, the cost is high; and if the glue layer is too thick, the internal stress will increase, and it is easy to penetrate the glue; if the glue amount is too small, it is not conducive to the infiltration of glue, and the glue layer will be incomplete. The length of aging time should be appropriate, and it should be reasonably changed with climate change. To achieve the whole core board, reduce the core board stacking and separation. It is necessary to pay attention to mastering the speed of pressure reduction and pressure reduction, especially when there is more moisture in the slab.
In addition, new technologies and new equipment are adopted, such as the use of high-efficiency jet veneer dryer, core board sewing machine, core board leveling machine, to realize continuous operation of gluing, blank grouping, pre-pressing, and hot-pressing, using mechanized loading and unloading, Quickly closing the hot press, etc., can accurately control the process conditions, so that the product quality is more guaranteed.