Method and device for particle board production
FIELD: process engineering.
SUBSTANCE: proposed method comprises crushing chipwood into shavings. The latter is dried, glue is applied thereon and shavings is filled thereon to produce shavings carpet to be compressed thereafter at certain temperature. Prior to cutting, water steam is fed onto wood chipwood. Wood chipwood, at least, frozen partially through is used. Prior to cutting, it is thawed and dried. Proposed device comprises machine tool to produce chipwood, chipwood drier, appliance for glue application and press. Proposed device differs from known designs in that in incorporates hopper intended for feeding steam onto chipwood contained therein, steam temperature and amount regulator, and chipwood drier. Note here that steam temperature and chipwood amount are controlled to implement above described method.
EFFECT: high process rate using perfected device for production of particle boards.
16 cl, 2 dwg
The invention relates to a method of manufacturing particleboard, in which wood chips are cut into chips, dried chips, put on chips glue and fill the chips with the formation of a bonded carpet, which is then pressed under pressure and temperature, as well as to an apparatus for the production of particleboard from wood chips, containing a machine for harvesting chip, the device for drying chips, a device for applying glue, a device for the distribution of chips in the formation of a bonded carpet and the press.
This method is described, for example, in the lexicon of the wood (Holzlexikon), 4th edition, publisher DRW.
To known chipboard production to ensure continuity of production, always produce a supply of chips. It is stored on the street or in large bunkers. Then the chips are processed in machines for harvesting and chip into a chip, which then must be dried for the possibility of filing for further processing steps in the production of particleboard.
The disadvantage is that located in the intermediate storage of wood chips during storage outdoors exposed to weather. First of all, when winter temperatures are staged on the street or in bunkers chips gets frozen and/or partially mixed with snow. Then when the chips are processed in p the HUS and is followed by drying of the chips, power devices for drying is often insufficient. This leads to the fact that the throughput rate of the process must be slowed down to increase the time of passage of the chip, which reduces the produced quantity and, thereby, increase production costs, or have to live with lower quality chips, and thus, and as produced from them chipboard.
Along with chips can be moved and also other impurities, such as sand or stones. They can cause damage, for example, a machine for harvesting chips.
Therefore, the basis of the invention is to maintain high process speed in the production of chips regardless of weather conditions, and improvements known from the prior art devices for the production of chipboard so that there was the possibility of performing such a method.
According to the invention this problem is solved due to the fact that known from the prior art method before cutting into wood chips served water vapor, and use wood chips, which is at least partially frozen, and before cutting it thawed and then dried.
By supplying the chips of water vapor the chip moisture content increases, which is an advantage especially in the summer when the chips under the influence of the summer is perator is dried. After filing the chips of water vapor again it is drying to obtain a certain value of residual moisture.
Preferably the drying of wood chips is accomplished by extrusion of the contained water by the so-called sealing screw, as it is known, for example, for the production of fibers from wood chips from UR 1775376 A2. Such mechanical drying compared to drying by evaporation contained in the wood chips moisture is particularly energy-saving. Due to this reduced energy costs and thereby the cost of production of chips.
Particularly preferably, the chips were dried to a predetermined residual moisture. Thus, regardless of weather conditions the wood chips is fed to further processing steps with a certain humidity. Therefore, the chips produced from wood chips with a uniform moisture content, is not dependent on weather conditions consistent quality, due to which the quality of her subsequent products, such as particleboard, is also consistently high.
Preferably, when applying the sealing screw is already pre-grinding chips. Due to this relieves the load on the machine for harvesting chip because it is served in smaller chips. Due to this machine for harvesting chips can Perera is processed chips in large quantities, that leads to increased productivity and, thereby, to reduce production costs.
Particularly preferred if the steam which is fed to the chips, at a pressure of 2 bar has a temperature of ~ 130°C.
Preferably the water vapor at a pressure of 12 bar has a temperature of ~ 190°C.
The used steam is preferably saturated steam, i.e. steam without liquid component. The use of saturated steam provides, in contrast to superheated steam or hot air, the transfer of a large amount of heat in the shortest time.
Preferably, residual moisture, which is the drying of wood chips, is from 80 to 100% of absolutely dry wood, that is absolutely dry wood with a moisture content of 0%.
At least partially frozen chips, it is preferable to thaw the flow of water vapor. This occurs primarily when stored outdoors chips adhering under the influence of winter temperatures. If stored in chips additionally gets snow, falling snow into the machine, along with chips gets plenty of moisture. After drying of wood chips, it is irrespective of weather conditions is dried to a certain residual moisture. This residual moisture does not depend on the initial moisture content, which in winter is up to 200%, and in summer the use of the but from 35 to 50% recycled wood and wood residues from sawmills, and about 74% of roundwood.
Also other impurities that can get into the installation, along with chips, for example, sand or stones, reliably separated at this processing step so that the resulting damage in subsequent production steps, for example, in a machine for harvesting chips, can be excluded.
Due to the proposed method, the process of manufacturing particleboard can save and also in winter or extreme summer weather conditions of high speed and high quality. Due to the high quality of the manufactured chips, it was found that usually a bit lower technological parameters "winter particleboard made from this "winter chip", now meet the standard requirements or even exceed them.
The proposed installation for the production of particleboard characterized by the presence of a bunker, which provides the possibility of water vapour contained in the chips and which is equipped with a control of the temperature and quantity of steam, and drying the chips, and the control of the temperature and quantity of steam is configured for carrying out the invention method.
After raw materials, primarily wood, has been redesigned chipping machine in chips, which were temporarily stored on the face or in large bunkers, the chips, which during storage were subjected to weather conditions, is fed into the hopper, where it is served water vapor. Due to this frozen winter chips thawed and dried out in the summer of chips - moistened. Then, the chips served in located in the direction of the process device for drying of wood chips, where the chips are dried, particularly preferably to a predetermined residual moisture. Only after that, the chips, now with the optimum moisture content, is fed to further processing by cutting chips and drying.
Preferably, the device for drying chips are made in the form of a sealing screw with a few turns. When the chips are moving through the auger and permanently sealed. Due to this, pressed contained in the wood chips water. This type of drying is especially energy-saving, as contained water is not evaporated, and energy is needed only for the rotation of the screw.
Preferably, the sealing screw is input and output, and the distance between the coils of the sealing screw is reduced in the direction of exit of the sealing screw. Due to this being moved to the sealing auger chips are compacted and pressed it contains water.
In order to seal floating in the sealing auger chips, the tilt coils sealing screw, for example, increases towards the structure to the output o of the screw. Preferably, the ratio of the inclination of the orbits at the entrance sealing screw to tilt coils at the output o of the screw is from 1:2 to 1:1. Of course, also possible to realize a combination of changing the inclination of the orbits of the sealing screw and changing the distance between the coils.
Next, using the drawings will be explained in more detail an example implementation of the invention:
Figure 1 - schematic implementation of the proposed method,
Figure 2 - schematic representation of the hopper, having the opportunity to work with steam, followed by drying by sealing the screw.
Figure 1 shows a schematic sequence in the form of a block diagram of the production of wood chips from the chip technologically situated in front of it production chips. Stored on a wood stock raw wood is fed into the chipping machine, which converts it into chips. She temporarily stored chips. Alternatively, the chips can also be purchased from outside. Such supplies chips temporarily (intermediate) are stored in the open storage area for wood chips. Such intermediate storage on the street leads, first of all, in winter, to a significant loss of quality of the chips, as, for example, it can get snow or she can smartnotes.
Warehouse chips chips served in a machine for harvesting chip is e directly while initially directed into the hopper. In the bunker on chips served water vapor preheated to a temperature of 130-190°C. due to this frozen chips thaws, and perhaps captured the snow melts. If the chips in the storage of wood chips dried out, which happens primarily in the summer when high temperatures and strong solar radiation by water vapor in it again enters the moisture.
After passage through the hopper chips are fed into the drying device. It chips dried up, preferably, a predefined value of the residual humidity of 80-100% with respect to absolutely dry wood, that is absolutely dry wood with a moisture content of 0%. This can be done through various mechanisms of drying, for example, evaporation accumulated in chips water. Particularly energy-efficient and thus cost-effective and environmentally friendly, is feeding wood into sealing screw, in which the chips continuously compacted, due to which the contained water is wrung out. Such sealing screw is used, for example, in order to apply the wood chips in the digester for fetching wood fiber. After drying, the chips regardless of weather effects is dried to a certain residual moisture. This residual moisture does not depend on the initial moisture content, which faced the t in winter up to 200%, and in the summer from about 35 to 50% recycled wood and wood residues from sawmills, and approximately 74% of roundwood.
Now the chips with the optimum moisture content is fed into the machine for harvesting chip, which converts wood chips into wood chips that are transmitted after the subsequent drying step in the drying device chip for further processing.
Through the use of a sealing screw 10 during the drying of wood chips is a preliminary grinding. Due to this reduced the load on the machine for harvesting chip, and it can process a larger number of chips. Consequently, this increases productivity and reduces production costs.
Thanks to this method, supported by high speed in the production of wood chips for the production of particleboard in essence, regardless of weather conditions with simultaneously high quality chips.
Figure 2 schematically shows the hopper 1, which can be served hot steam, followed by drying in sealing screw 10. With laydown chips is introduced into the hopper 1 in the direction of the arrow A. There with the unit 2 steam it steam is fed. It is possible frozen chips thaws, and, for example, dried under the influence of too strong sunlight chips receives moisture. C is the chip falls into the charging port 4. This boot hatch 4 using the temperature sensor 6 measures the temperature. The results of this measurement to control flow rate of 8 pair. Thus it is guaranteed that the chips, which falls through the loading hatch 4 always has a constant temperature.
After falling through the loading hatch 4 chips go on the sealing screw 10. The coils 12 of the sealing screw 10 in figure 2 have a constant rise, however, the distance between the two coils 1 continuously decreases in the direction from input to output o of the screw. Sealing screw 10 rotates in the direction of rotation R around its longitudinal axis, and thus delivers in Fig. 2 falling right through the charging port 4 on the sealing screw 10 chips.
Due to the decreasing distance between the two coils 12 sealing screw 10 being transported through the sealing screw 10 chips permanently sealed. Additionally, the diameter of the pipe 14, which is the sealing screw 10, decreases towards the right. It also leads to additional seal being transported through the sealing screw 10 chips and preliminary grinding of the chips in the sealing screw.
On the right in Fig. 2 the outlet pipe 14 is of the arrester 16. It in the direction P is applied pressure, and thereby maintaining high the th pressure in the pipe 14. In the pipe 14 chips is sealed, and the contained water is wrung out. For this purpose around the pipe 14 is a drain 18 through which a given serving of chips water.
1. The method of manufacture of chipboard (particleboard), in which wood chips are cut into chips, dried chips, put on chips glue and fill the chips with the formation of a bonded carpet, which is then compressed under pressure and heat, wherein before cutting into wood chips served water vapor, and use wood chips, which is at least partially frozen, and before cutting it thawed and then dried.
2. The method according to claim 1, characterized in that the drying of wood chips from her squeeze it in the water.
3. The method according to claim 2, characterized in that the water squeezed through the sealing screw (10).
4. The method according to claim 3, characterized in that the sealing screw (10) is pre-grinding chips.
5. The method according to claim 1, characterized in that the chips are dried to a pre-set value of residual moisture.
6. The method according to claim 1, characterized in that the water vapor at a pressure of 2 bar has a temperature of about 130°C.
7. The method according to one of claims 1 to 5, characterized in that the water vapor at a pressure of 12 bar has a temperature of about 190°C.
8. The method according to claim 5, the tives such as those what chips are dried up to 80-100% residual moisture content relative to the absolutely dry wood.
9. The method according to claim 1, characterized in that the at least partially frozen chips thawed by feeding it water vapor.
10. The method according to claim 9, characterized in that the defrosting occurs by controlling the temperature and quantity of steam.
11. Installation for the manufacture of chipboard (particle Board) of wood chips, containing a machine for harvesting chip, the device for drying chips, a device for applying glue distribution device chip and the press, characterized in that it comprises a hopper (1), which provides for the possibility of water vapour contained in the chips and which is equipped with a control of the temperature and quantity of steam, and the device (10) drying of wood chips, and the control of the temperature and quantity of steam is configured to implement the method according to one or more of claims 1 to 10.
12. Installation according to claim 11, characterized in that the device for the drying of wood chips is the sealing screw (10) with several coils (12).
13. Installation according to item 12, characterized in that the sealing screw (10) has an input and output, and that the distance between the coils (12) sealing screw (10) decreases in the direction of the exit.
14. Installation according to item 13, characterized in that the lifting of coils (12) in letsitele screw (10) increases in the direction of the exit.
15. Installation according to item 12, characterized in that the ratio of lift coil (12) sealing screw (10) at the entrance to the rise of a coil (12) the output is from 1:2 to 1:1.
16. Installation according to item 13, wherein on the output side of the sealing screw (10) is provided by the holder (16).
FIELD: wood working industry.
SUBSTANCE: invention relates to the field of production of wood-particle composite materials and relates to wood-particle composite material and method of its manufacturing. Material contains pressed wood-particle filler and binder, material has monolithic low-porosity structure characterized by achieved density of up to 2 g/cm3, thickness of chips makes from 0.1 to 1.0 mm, pores of wood-particle filler are fully filled with binder, such as wood resinous substances that are released from chip filler in process of its hot pressing as composite material is made. Method of manufacturing consists in the fact that filler is pressed as wood chips in presence of binder, at the same time binder is used, which is released from chips as it is pressed with pressure of 2-5 MPa, besides puncheon and die of press are pre-heated to temperature of 220-300°C, and process of hot pressing is carried out in cyclic loading mode.
EFFECT: invention makes it possible to increase efficiency of wood-particle composite material manufacturing method and to improve quality, due to increased strength, water resistance and fire resistance of manufactured wood-particle composite materials.
FIELD: technological processes.
SUBSTANCE: method for manufacturing of boards from chip or fibre material, in particular chip boards, LDF, MDF, HDF and OSB boards, includes the following stages: (S2) - production of dried chip or fibre material, (S3a, S3b) - plasma treatment of dried chip or fibre material, (S4a, S4b) - application of glue onto plasma-processed chip or fibre material and (S5) - pressing chip or fibre material, on which glue is applied into boards. Technological gas used at stage (S3a, S3b) of plasma treatment contains fluorine as additional component. Board contains not more than 50 kg of hard glue per cubic metre.
EFFECT: invention improves quality of boards.
13 cl, 1 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to production of construction and heat insulation materials. Proposed complex comprises crusher, hopper, mixer, reed powder hopper, reed powder feed conveyor for production sandwich panels with vacuum-powder insulation or materials made from cheff or reed powder heated to 190-200°C to separate resin-based adhesive, rolls, molds and acclimatizator heated to over 200°C and oscillating at preset rate, and arranged under said conveyor. Note here that hopper is furnished with mixer and hot water circulation jacket and jacket with branch pipe to feed heat carrier and to dry cheff to 90-95°C. Mixer is communicated with vertical heated mill furnished with hot water circulation jacket.
EFFECT: production of new heat insulation material.
2 cl, 6 dwg
SUBSTANCE: invention is related to epoxide-wood composition for production of pressed boards used to cover foam polystyrene plates from external and internal sides on glue in order to protect them against external impact and to increase their service life. Composition includes the following components, with their following ratio, wt %: 37.2-43.5 of epoxide-diane resin ED-20, 3.7-4.3 of amine hardener of polyethylene polyamine, 43-52.1 of pine woodchip filler, 6.3-11.9 of polymer filler. Polymer filler used in composition is foam polystyrene chips - wastes of heat insulation production.
EFFECT: invention makes it possible to increase physical and mechanical characteristics of composition, to recycle wastes of wood processing and heat insulation materials.
2 tbl, 3 dwg
FIELD: technological processes.
SUBSTANCE: invention is intended for woodworking and construction industry, and also environmental protection, and may be used in production of different construction materials, furniture panels, etc. Particles of organic filler, in particular wastes of woodworking industry, are ground to size of 1-0.25 mm, fractioned and dried to moisture extent of 3% and below. Then particles of this component and thermoplastic binder are charged with opposite electric charges by means of their supply to surface of rotor that rotates with circumferential speed of 80-120 m/s. As thermoplastic binder you can use domestic waste, such as polyethylene bags, containers. Charged particles of filler and binder are mixed. Mass prepared in mixer is sent through overbridge equipped with bipolar ioniser. Length and diametre of overbridge are such that they provide time of 10-12 sec for mass staying, which is sufficient to achieve residual charge of static electricity by voltage value of 20-500 V/cm. Invention makes it possible to produce cheap items by simple method with density of 0.99-1.00 g/cm3 and flexural length of at least 42 MPa, to recycle wastes, improve ecology and reduce toxicity of items.
EFFECT: production of cheap items by simple method with density of 0,99-1,00 g/cm3 and flexural strength of at least 42 MPa, recycling of wastes, improved ecology and reduced toxicity of products.
1 dwg, 1 tbl
FIELD: wood industry.
SUBSTANCE: invention pertains to production of chipboards. The board includes bottom and top surface layers with fine particles, and an intermediate layer with more coarse particles is placed between these surface layers. The intermediate layer has various density in the areas, where the board is supposed to be attached to an other object. The chipboard production method includes even distribution of fines followed by generation of the first particle matrix to form a bottom surface layer, distribution of more coarse particles followed by generation of the second particle matrix above the fine particle matrix using a distribution device so that at least in one zone the coarse particles are applied in a more thick layer than at least in one surrounding area, even distribution of the fine particles followed by generation of the third coarse particle matrix to form a top surface layer and compression of the first, second and third matrices, whereby the intermediate layer thickness remains virtually unchanged, so the intermediate layer has various density.
EFFECT: produced chipboards feature increased soundproof and heat-insulating properties, and light weight, that facilitates efficient shipment of the processed boards.
9 cl, 13 dwg
SUBSTANCE: method of construction beam production out of modified wood involves wood modification by squeezing fine metal powder into lumber cavity, with further formation of lumber face by rolling even surface before feeding it into reverse mold, where lumber is put by metal faces together. Then ultra high frequency (UHF) current is applied to beam ends to mollify metal powder, and modified materials are connected in reverse mold by pressing, at the moment of which UHF current is switched off, and obtained seam is cooled, finished beam is extracted from reverse mold freeing it for next beam pressing.
EFFECT: obtainment of construction beams of specified shape and strength properties.
1 dwg, 1 tbl
SUBSTANCE: converted timber or chip plate is made of eucalyptus breeds and connected by means of binding substance containing isocyanatic or phenol polymeric compound. Eucalypti of the following species were selected: Bluegum (E. Globulus), Karri (E. Diversicolor), Sydney Bluegum (E. Saligna), Marri (E. Calophylla) or Jarrah (E. Marginata).
EFFECT: high surface strength, wet resistance and low swelling ratios.
10 cl, 1 dwg
FIELD: technological processes.
SUBSTANCE: method includes grinding of woodworking wastes or plant materials, mixing with binder and subsequent pressing. Binder is liquid sodium glass that contains dry substance of glass 30-70; water 70-130 wt parts; at that cold pressing is executed, and binder is taken in amount of 20-50 wt parts per 100 wt parts of wastes. Binder may additionally contain hardener - salts of mineral acids in amount of 3-5 wt parts, in this case liquid sodium glass is preliminarily homogenised with hardener.
EFFECT: invention makes it possible to prepare ecologically clean, thermally resistant and moisture resistant items.
8 cl, 3 tbl
SUBSTANCE: rush stems are flattened in rolls, laid mutually perpendicular and milled into shreddings with particle size of 5-15 mm or into powder with particle size of 100-300 mm, saturated with water solution of bakelite resin in amounts of 1-2% or with water solution of wax emulsion, or mixed with heated up to liquid state bitumen or with particles of wire in amounts of 0,5-2%. Then the raw material is heated up to release of proper bonding agents, pressed either in pressing molds or through shaped hole of pressing mold with required products forming and is hold in acclimatisator until cooling.
EFFECT: invention allows for reducing energy consumption and obtaining strong, durable and ecologically clean construction materials, products and structures.
2 cl, 4 ex
FIELD: wood-working industry; production of pressed building items.
SUBSTANCE: the group of inventions is pertinent to the field of production of pressed building items made out of plant roughage and may be used in wood-working construction industries and other branches of economy. The panel made by pressing out of a carpet without synthetic binding materials consists of a mixture of a birchen bark ground up to a faction of 40-5000 microns and a filler predominantly out of cellulose filaments at the following ratios in respect to the total dry solid matter (in mass %): a birchen bark - 60-95, cellulose filaments - 5-40. In an alternative version of the panel, which is made the same way as the above, the outer surfaces of the carpet are strengthened with lingo-cellulose-polymeric compound including an excelsior and the KF-EC resin with a hardener or an excelsior and triturated secondary polymer taken in amount of 10-12 mass % to the weight of the excelsior. At that the share of the lingo-cellulose-polymeric compound makes 20-40 % to the total dry weight of the carpet. The method allows to use a ground birchen bark without synthetic binding agents for shaping a carpet and its consequent pressing. At that for a carpet formation they use the birchen bark ground up to a faction of 40-5000 microns, and a filler mainly made out of cellulose filaments taken in the following ratio in respect to the total dry weight(in mass %): a birchen bark-60-95, cellulose filaments - 5-40. Before formation of the carpet the filler is moistened up to 18-20 % of absolute humidity and is mixed with ground birchen bark. The carpet is formed with a thickness equal to 200-300 % of the thickness of a finished panel. The group of the inventions ensures simplification of the production process, reduction of its cost, expansion of the range of the List of items.
EFFECT: group of the inventions ensures simplification of the production process, reduction of its cost, expansion of the range of the List of items.
8 cl, 1 tbl
FIELD: production of plate materials of the splint-slab type, applicable in the wood-working and building industries.
SUBSTANCE: the method consists in processing of husk particles by a binder containing urea-formaldehyde resin, ammonium chloride, Aerosil butadienstyrene methacrylic latex, forming of the mat, cold prepressing and hot pressing. The binder instead of ammonium chloride contains ammonium fluosilicate at the following relation of the components, mass percentage: urea-formaldehyde resin - 82.8 to 93.4, ammonium fluosilicate - 0.6 to 1.2; butadienstyrene methacrylic latex - 4.0 to 12.0, Aerosil - 2.0 to 4.0.
EFFECT: enhanced physico-mechanical characteristics of the plates.
FIELD: production of building materials, applicable in the wood-working, furniture and building industries.
SUBSTANCE: the method consists in mixing together of wood particles with urea-formaldehyde resin, butadienstyrene methacrylic latex, ammonium chloride and Aerosil, forming of the mat, cold prepressing and hot pressing. The binder instead of ammonium chloride contains ammonium fluosilicate at the following relation of the components, mass percentage: urea-formaldehyde resin - 82.8 to 93.4, ammonium fluosilicate - 0.6 to 1.2, butadienstyrene methacrylic latex - 4.0 to 12.0, Aerosil - 2.0 to 4.0.
EFFECT: enhanced physico-mechanical and ecological characteristics.
FIELD: wood-working industry, in particular, methods for decreasing the content and emission of formaldehyde intended for fiber boards.
SUBSTANCE: the process of production of fiber boards is conducted with employment of aminated adhesive resins with an addition of substances binding the formaldehyde by compacting in running presses or continuous-action presses and by cooling. After compacting, but before cooling the fiber board is subjected to a short-time curing at 80 to 100C during 6 to 16 hours, depending an the expected level of decrease and emission of formaldehyde and used parameters of the process of production.
EFFECT: reduced content and emission of formaldehyde in the fiber board.
5 cl, 3 dwg, 3 ex
FIELD: wood-working industry, applicable in furniture, building, packaging and machine-building branches of industry.
SUBSTANCE: the method consists in the fact that filings and sawdust composed of: coniferous needles - 80%< filings - 10%, sawdust - 5% and wood fibers - 5% are added to the ground pulp of coniferous needles. The obtained mass is fed to the forming unit, which forms the sheets, which are fed to a press, where they are compacted at a pressure of not more than 10 Mpa at a temperature of not higher than 250C during not longer than 30 S. The obtained coniferous-needle material is cooled down, packed and delivered to the consumers.
EFFECT: produced material with breaking load, high density, low water absorption.
1 dwg, 1 tbl
FIELD: manufacture of substantially flat articles, for instance particle boards and other articles of industrial wood residue or vegetable raw materials by hot pressing thereof.
SUBSTANCE: method for particle board production involves performing hot molding at temperature of 120-200°C and under pressure of 2.5 - 30.0 MPa for panel forming. Industrial waste, molasses, concentrated corn steep or mixture thereof are used as binding material, wherein lime and starch-containing materials are added to mixture including industrial wood residue or vegetable raw materials and the binding material before hot molding operation beginning.
EFFECT: increased ecological safety and increased strength of the panels.
4 cl, 1 tbl, 1 ex
FIELD: production of plate material.
SUBSTANCE: proposed composition is made on base of dispersed raw material with modifying additive; plate material is made by molding the said composition at temperature of 160-190°C and pressure of 65-95 kg/cm2; molding time of 1 min per 1 mm of plate thickness. Used as modifying agent are acid by-products of oxidation of cyclohexane of caprolactam process at mass ratio to wood wastes of 50-70:30-50, respectively.
EFFECT: facilitated procedure of production of composition.
FIELD: wood-working industry.
SUBSTANCE: fiber or chip is dried, then it is mixed with glue at a temperature of below 100C, and a plate is formed at a temperature above 140C, wood is decomposed into solid and liquid components that are used as the glue. The installation for manufacture of the plate has a drying device, device for application of glue onto the fiber or chip, device for compaction, transport facilities for transferring the fiber or chip from the drying device to the device for application of glue, mixer having means for cooling the body. The contents of glue in a plate obtained with the use of the installation makes up 45 to 55 kg per cubic meter of plate.
EFFECT: produced plate with a lower contents of glue as compared with plates produced by the known methods.
31 cl, 2 dwg
FIELD: compositions used for manufacture of plates from wood laminate.
SUBSTANCE: composition for manufacture of plates contains rice shell or rice shell and sawdust mixture used as filler, liquid sodium glass having modulus of 2.4-3.6, and silicon dioxide. Artificial silicon dioxides or siliceous dust-like wastes of various industries may be used as silicon dioxides, with SiO2 content making at least 80%. Composition components are used in predetermined ratio.
EFFECT: improved strength and water tightness, and increased efficiency in utilization of various wastes.
FIELD: wood-working industry, and namely the method of manufacture of the structural unit, in particular, slab of wood fiber, wood chip and/or sawdust, and pressing of fiber, chip, and/or sawdust with applied glue for formation of the structural unit, in particular, slab.
SUBSTANCE: at first the wood fiber, chip and/or sawdust are decomposed by steaming into liquid components and hard components. The liquid components are separated and cooled inside the closed hermetic system up to their discharge from the system. During this process the ecological load caused by odor is sharply reduced. The invention also includes a device for realization of the method and a structural unit manufactured on it.
EFFECT: produced an ecologically pure method for manufacture of slabs and a device for its realization.
46 cl, 3 dwg