Veneer production forms the basis of plywood manufacturing. This material is got from log pieces. JSC Rechitsadrev produces plywood from birch and alder. The enterprise has a new grading line and a crane for unloading and feeding raw materials for grading. Wood does not have plastic properties to change its original shape during peeling. Therefore, wood grains are treated in hot ponds, which improves their plastic properties. This contributes to smooth and tight veneer.
Raw materials undergo the obligatory stage of preparation for peeling, barking. This significantly increases the life of peeling knives and results in the comprehensive use of production waste (bark and broken veneer) for technological purposes. JSC Rechitsadrev uses the automatic cutting and feeding line produced by CJSC Yekaterinburgskiye lesnye mashiny (Yekaterinburg forestry machines), the Russian Federation. This ensures the individual approach to cutting every block depending on the quality of wood and the location of flaws according to the most suitable scheme.
Veneer peeling is the major technical operation in plywood production. Three new peeling lines produced by JSC Proletarskaya svoboda, Yaroslavl, the Russian Federation, ensure the transverse cutting of wood which results in the continuous veneer line.
Piles of veneer are transported by a cargo-handling vehicle to the drying and grading section where the veneer is dried until the humidity reaches 6% and automatically graded or go to stock. Automated peeled veneer drying line Grenzebach has the capacity of 7 m3/hour and SRGM 40 – 8m3/hour. Here, the moisture from pores and wood cell walls is removed. Veneer grading is an important stage. Sheets are graded according to the combination of defects (wood flaws and processing defects).Graded veneer goes to two Hashimoto lines for splicing, where pieces are joined to form a uniform canvas by means of thermoplastic threads and points of hot-melt adhesive on edges.
High quality veneer is used to produce the outer plywood layers. The face layer uses wood only. Inner layers can have insignificant defects.
Plywood is glued in hot hydraulic presses produced by Kitagava (Japan) and Volev (Ukraine), which are equipped with the electronic system controlling the processes of pressing, mechanic feeding and unloading.
After some time of treatment, plywood sheets are cut from four sides using the cutting machine produced by JSC Proletarskaya svoboda (Russian Federation) according to sizes which comply with the requirements for the product.
The final stage of plywood production is the mechanic treatment – sanding. The new sanding line IMEAS with a ventilation unit and automatic dust briquetting system is equipped with two UAB presses which produce 400 briquettes per hour (2 thousand tons per year) and represents a closed zero-waste cycle.
The upgrade of production facilities ensures the production of 40-45 thousand m3 of plywood per year. At the same time, the production structure will change to produce up to 70% of high quality products. The company purchased and installed equipment produced by Sitor (Slovenia) to manufacture bent and glued elements, lamellae.
90% of the plant’s output is exported.