In the production of plywood, almost every process affects the quality of plywood gluing to varying degrees. In order to facilitate the mastery, the following aspects are summarized:
1, the quality of the adhesive:
It is expressed in the performance of the synthetic resin adhesive for the adhesive, the combination of the components and the rubberizing process. In recent years, many domestic researches have been carried out on the various components of the plywood and the rubber mixing process. This not only saves a lot of chemical raw materials, reduces the cost of the products, but also improves the performance of the products. This is a performance of technological progress. In the production, only the synthetic resin used has excellent performance, sufficient bonding strength, reasonable distribution ratio of each adhesive group, stable performance of the prepared adhesive, suitable resin content and viscosity, and sufficient active period to ensure normal operation and various products. The indicator meets the requirements.
2, the quality of the board:
The quality of the veneer, especially its surface state, has a great influence on the bonding strength. The quality of veneer should be paid enough attention in the preparation of wood section and the process of veneer cutting. It is necessary to carry out softening treatment of wood well, control the conditions of rotary cutting to make the indexes of the veneer at the best value, and pay attention to the water content of the veneer. Rate and flatness.
3, plywood glue:
Before the rubber pressure, we should pay attention to master the two aspects of the amount of glue and slab aging. The amount of glue is too large, and the cost is high; and the glue layer is too thick, the internal stress is increased, and the glue is easy to penetrate; the amount of glue is too small, which is not conducive to the infiltration of the glue, and the glue layer may be incomplete. The length of the aging time should be appropriate and change with the climate change. To achieve core sheeting, reduce core lamination and separation. It is necessary to pay attention to mastering the pressure and pressure of the rubber strip, especially in the slab.
In addition, the use of new technology, new equipment, such as the use of high-efficiency jet veneer dryer, core panel stitching machine, core board leveling machine, to achieve sizing, preforming, pre-pressing, hot pressing continuous operation, using mechanical loading and unloading, Quickly close the hot press, etc., can accurately control the process conditions, so that the product quality is more guaranteed.
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