Wood has the ability to glue, and this distinguishes it from many other types of building and finishing materials.
As a result of bonding, an all-in-oneCompound, and if 50 years ago it was used as a joinery, today gluing is used to improve the physical and mechanical properties of wood.
Wood is an organic material thatAllows bending, linear expansion, torsion. It can change even the humidity. Therefore, when choosing glue, you need to consider that it meets all these requirements.
Preparation of glue for gluing wood
Wood products are glued together with joinery(Bone or mezdrovogo), a universal synthetic or casein glue. In this case, most often used carpentry glue, which can be made in the form of granules, tiles, as well as in crushed form. Apply it both in the production and repair of glued wood products.
For the preparation of glutinous mortar joinerTile glue must be crushed, then pour it with water and leave for 8-12 hours for swelling. It should cover the glue by a few centimeters. Then a part of the water is drained, and the adhesive is boiled on a small fire with constant stirring. To avoid burning glue, it should not be boiled directly on the fire. The dishes with the composition can be placed in another container, in which there is hot water. In order to determine the readiness of the glue, it is necessary to apply it to the board and check for stickiness.
Technology of gluing wood
Before repair, it is necessary to soften and removeOld glue with a wooden product. To do this, put a wet cloth on it for a short time (about 2 hours), after which the softened adhesive is removed with a knife.
The adhesive composition dries very quickly, so it is necessary to prepare it in small quantities. Also, remember that you should not add old glue to the new glue line.
Before gluing the product is necessary wellTo dry. The temperature in the room during gluing should be from 15 to 20 degrees. If it is higher - the glue will become too liquid and when squeezing the parts it will squeeze out of them, if lower, the glue will be very thick and will not be able to penetrate all the pores of the parts. The surfaces to be glued must be flat. If necessary, their surface can be treated with a plane, file, and then with sandpaper No. 100-140. The dust that has appeared is removed with a brush and wiped with a dampened cloth or acetone.
The adhesive must be heated to 50-60 ° C when applied to the surface. In this case, it will penetrate better into the pores of the glued wood. The thickness of the joint of dry glue should be from 0.1 to 0.15 mm.
When gluing, the composition is applied directly to bothSurface. If the bonding occurs along the fiber, the surface is greased with glue 1 time, if the butt (ends) - 2 times, with the second layer of glue applied after the partial drying of the first layer (when touched it must be sticky and stretch into the thread). After this, the parts prepared for bonding should be connected and clamped in a vice or by a screw clamp. You can also tie the product with a bandage.
If the adhesive was used too thick, compressionNeed to be strengthened. This is necessary to reduce the thickness of the adhesive layer. The bonded product should remain compressed for approximately 3 hours. Plywood is kept for at least five hours. If the product is to be further processed, it is kept for 2 days.