Plywood production process
（Building templates, for example）
Technical features:
Our company USES the advanced automation equipment and production technology, makes the product in the process of production can be efficient and stable, ensure the stability of production; Because of our core board adopt are level 1 single double-sided adhesive, so the quality is reliable, can use repeatedly on construction projects at least ten times!
Production process:
1. The plywood veneer is the logs along the direction of rings spiral cut into large pieces of veneer (for used as a core board), after drying, coating, based on the principles of adjacent LVL wood grain direction perpendicular group of billet, agglutination of plate. LVL with odd number, generally for three to thirteen layer, the outermost positive veneer is called the panel, negative called back, lining board called core board. (note: the panel is currently on the market and lagging mainly mongolica and New Zealand are two materials, including mongolica price is New Zealand pine expensive.)
2. The core board material: the main tree species are: kapur, willow, cypress, eucalyptus wood, etc. Fujian region, is most select eucalyptus wood, we adopt the core board are all primary eucalyptus wood veneer;
3. The core board rubber roll: selected core board, after the rubber core board through the rolling machine core board surface coating on a layer of glue; Because of the different cost, so some manufacturers will roll core board single-sided adhesive, we roll USES a double-sided adhesive, so occupy a certain advantage in quality; Currently used glue roller rubber can be divided into two kinds: phenolic glue and urea formaldehyde glue; Trial of phenolic glue can improve the life of the plywood and use, but in terms of relative prices, phenolic glue is more expensive than urea formaldehyde glue; We use the glue for phenolic glue;
Roll plastic machine
4. Assembly line layout: the roll core board after the glue on the automated assembly line layout according to the principle of symmetry and singular layer; Row of the board according to the predetermined length at the back of the line, automatic cut into sheets good plywood (our company because of the core board is the level of eucalyptus wood veneer, so do not need to fill in the process of row plate hole, make the plywood on the whole structure is more complete, to ensure the superiority of quality)
The attached:
Symmetry principle: veneer on either side of the center of symmetry plane, regardless of trees, veneer thickness, layer number, manufacture method, the fiber direction and the moisture content of veneer should correspond to each other, namely the symmetry principle of plywood layer corresponding to different direction on both sides of the center plane stress equal size. Therefore, when plywood moisture content change, its structure is stable, won't produce deformation, cracking and other defects; On the other hand, if the center of symmetry plane corresponding layer on both sides have some differences, will make the stress of the center of symmetry plane veneer on both sides are not equal, make plywood produced out of shape, craze.
Principle: the odd layer due to the adjacent veneer plywood is the structure of the fiber direction vertical to each other, and must conform to the principle of symmetry, so it must be an odd number of total number of plies. Such as: five layer board,
Automated assembly line
5. Plywood early cold press: will be a good amount of plywood line to cold press machine for cold press, makes preliminary bonded plywood;
Cold press
6. Rubber roll panel: after the cold press have preliminary bonded plywood via rolling rubber roll glue again, on the panel and the back surface plating a layer of glue, waterproof and wear-resisting function;
Roll surface plate
7. Plywood hot-pressing: will rolled panel again hot-pressing glue plywood to the hot-pressing machine, making fully bonded plywood, form a complete piece of plywood;
Hot press
After hot pressing molding plate
8. Plywood cutting edge: the hot pressing of plywood trimming to automatic cutting machine, makes the specifications of the plywood is 915 * 1830 mm;
Automatic cutting machine
9. Fill side molding can shipment: will be cut into a unified specification plywood whole into a stack, on the fringes of beautiful and repair, and then can be packaged delivery;
Finished product pictures:
