Line to manufacture particle boards
FIELD: wood working industry.
SUBSTANCE: invention relates to wood working industry and may be used in production of multilayer particle boards. A line to manufacture particle boards comprises a belt conveyor, a machine to generate a chip carpet, a press and a spraying plant installed upstream the press with a valve to supply water. At the same time the line is equipped with an additional spraying plant with a valve installed upstream a shaping machine and a unit to measure warpage of boards installed downstream the press. Outlets of the unit to measure warpage are connected to control inlets of spraying plant valves. Due to development of moisture asymmetry of surfaces in the initial chip carpet, as a result of which mechanical stress occurs in a formed board during pressing that compensate for its warpage, which starts immediately after unloading of a board from the press, warpage in finished boards is eliminated.
EFFECT: invention may be used in production of multilayer wooden boards.
The invention relates to woodworking industry and can be used in the production of laminated wood boards.
The known method and device for the manufacture of plate materials [German patent DE 10315922 A1, MKI B27N 3/18 Verfahren und Anlage zur Herstellung von Plattenwerkstoffen]. The device comprises a conveyor belt forming machine, placed between forming machines sprinkler installation and press.
In the known device the water or water vapor serves sprinkler installation in the Central part of the bonded carpet to create steam blow during pressing. Thus pokeronline finished plates persists.
Known farmhouse-extrusion line for the production of chipboards [Handbook for the production of chipboard. / Youthlaw and others - 2nd ed. Rev. and supplementary): genre differences. prom the terrain, 1990, page 236], which includes a belt conveyor, machine for forming bonded carpet, press and installed before the pressure of a sprinkler with a valve to supply water.
In the famous line sprinkler is used to create steam blow during pressing, designed to reduce the time of pressing. However, in the process of production of chips from the upper layers of the carpet is screened at the bottom as a result of vibration, the upper surface of the bonded Cove is and dries or it may be waterlogged because of the inaccuracy of working sprinklers, and when there is a pressing asymmetry of the temperatures of the upper and lower pressing plates to 5-8°C [Galimov V.G. Equipment for pressing wood-fiber. - M.: Genre Differences. prom the terrain, 1983. - 56 S.] These and other causes humidity, structural and thermal asymmetry of the mode of production of chipboard, which causes them to warp.
The invention solves the problem of eliminating warp manufactured chipboard.
The technical result from the use of the invention is the reduction or complete elimination of warp manufactured boards by creating asymmetry humidity of the upper and lower surfaces of the compression bonded carpet, resulting in the slab arise mechanical stress, which compensate for pokeronline caused any technological errors.
This technical result is achieved by the fact that in line for the manufacture of chipboard, including belt conveyor, machine for forming bonded carpet, press and installed before the pressure sprinkler with valve for water supply, according to the invention the line is supplied with additional sprinkler installation with valve placed before forming machine, and the unit of measurement warp plates, placed after the pre is sa, moreover, the outputs of the measuring unit of warp is connected with the control inputs of gates sprinkler.
Declare line for the manufacture of chipboard is placing before forming machine additional sprinklers from the valve, the introduction of the measurement unit warp plates, placed after the press, and the connection of the outputs of the measuring unit of warp with the control inputs of gates sprinkler.
Eliminating warp ready plates is achieved by creating a humid asymmetry surfaces of the original strand Mat, which when pressed into the formed slab arise mechanical stress, compensating its warping, which begins immediately after unloading plates from the press.
Figure 1 shows the structural diagram of the line, figure 2 - schematic diagram of the measuring unit of warp.
Line for the production of chipboards and includes a belt conveyor 1, machine 2 for the formation of a bonded carpet (one or more depending on the number of layers of manufactured boards), press 3, made for example in the form of a continuous press action water sprinkler 4 located in front of the press 3, and a sprinkler 5 posted before forming machine 2. Poda is and water sprinklers 4 and 5 is carried out respectively by the valves 6 and 7, performed, for example, in the form of electromagnetic. The line also contains the block 8 measuring the warp of finished plates placed after the press, and the first and the second output unit 8 measurement warp connected to control inputs, respectively, of the valves 6 and 7. Unit 8 measurement warp contains is included in a bridge circuit the potentiometer 9, the engines are connected with the rollers 10 on the surface of the plate, and amplifiers 11-15.
The hotline is as follows.
Drive the conveyor belt 1 on which the forming machine 2 takes the chips, forming a bonded carpet. In the absence of steam blow when pressed sets the voltage at the control input unit 8 measurement warp is not available, Uass=0. If necessary, create a steam blow on the control input unit 8 serves specifies the voltage Uass. When the valves 6 and 7 are opened by the same amount, sprinklers 4 and 5 scatter on the conveyor belt 1 and the upper surface of the bonded carpet the same amount of water. In the absence of steam blow Uass=0 and the water through the valves 6 and 7 are supplied. Produce pressing in the press 3, after which the plate begins to warp. The magnitude and direction of the warp of the obtained plates are measured bloxom dimension warp, selected after you press 3.
In the absence of ready plates warp voltages at the outputs 1 and 2 of block 8 is equal to setpoint voltage Uassthrough valves 6 and 7 in sprinklers 4 and 5 is the same amount of water or water is not served at all. In the case of bending the middle of the plate (e.g., in the longitudinal direction) down the voltage at the output 2 of block 8 is only asking Uassand the voltage at the output of 1 is equal to the sum of the sets Uassand voltage of the amplifier 14, is proportional to the magnitude of the warp pointing down. Through the valve 6 serves more water than through the valve 7, the upper surface of the bonded carpet is moist stronger than the bottom, so after exiting the press 3 mid-ready plates warped up [see carpenters S.M. Study of warp chipboard with an asymmetric structure. / Izv. higher education institutions. Forest log. - 1989 - No. 1, p.53], compensating available pokeronline. In the case of bending the middle of the plate up output voltage 1 unit 8 is only asking Uassand the voltage at the output 2 is the sum of the sets Uassand voltage amplifier 15, is proportional to the magnitude of the warp upward. Through the valve 6 is served less water than through the valve 7, the lower surface of drugacnega carpet is moist stronger than the top, so after exiting the press 3 mid-ready plates warped down.
Line for the production of chipboards, including belt conveyor, machine for forming bonded carpet, press and installed before the pressure of a sprinkler with a valve to supply water, characterized in that the line is supplied with additional sprinkler installation with valve placed before forming machine, and the unit of measurement warp plates, placed after the press, and the outputs of the measuring unit of warp is connected with the control inputs of gates sprinkler.
FIELD: process engineering.
SUBSTANCE: invention relates to recovery of solid household wastes into polymer-wood composite material to be used in production of components and parts of machines, equipment and construction structures. Proposed method comprises wastes mincing, mixing, thermal extrusion and activation. Activation is performed by magnetic-acoustic resonance effects in the frequency range of 5 to 15 kHz and radiation power of 15 to 20 mW.
EFFECT: higher efficiency and rate, improved mechanical properties.
4 cl, 2 tbl, 1 ex
SUBSTANCE: unit includes housing (1), conveyor (2) for tray (3) delivery, covering chambers (4, 5) of air and water cooling. In addition, air or water cooled chambers (4, 5) are provided with walls (6), installed inside chambers (4, 5) along conveyor. Air cooled chamber (4) walls (6) are perforated, while water-cooled chambers (5) are made of capillary porous material with steam discharge pipes (9).
EFFECT: improvement of output and reliability.
2 cl, 1 dwg
SUBSTANCE: device for the steam treatment of a web moving relative to the device has steam outlet holes located on the steam head designed so that it can direct the steam pulse at an oblique angle relative to the web surface. Between the web surface and the steam outlet holes, a band screen is located, which moves synchronously with the web; the steam pulse can interact with the web through the band screen. The method involves manufacture of nonwoven fabric, its preliminary pressing, in particular, without binder curing, continuous pressing, during which the binder mainly cures, treatment with a steam pulse, which is directed at an oblique angle to the nonwoven fabric surface through the steam outlet holes on the rotatable steam head.
EFFECT: optimisation of continuous process during manufacture of plate-type structural element.
43 cl, 1 dwg
FIELD: machine building.
SUBSTANCE: proposed device scatters chip, for example, by air jet, to form chip carpet on, for example, belt conveyor. For scattering, gas flow is used, for example, air flow. Proposed device comprises scattering chamber mounted above said belt conveyor.
EFFECT: higher efficiency and reliability.
13 cl, 13 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to woodworking and may be used in production of fireproof particle boards. Proposed composition comprises wood particles, amidophosphate as fire-retardant additive, binder including resin and formaldehyde solution as additive. Resin binder contains melamine-phenolic resin and, additionally, latent catalyst while outer layers binder contains melamine-phenolic resin, latent catalyst and surfactant.
EFFECT: high-efficiency composition, higher quality of particle boards, better manufacturability.
2 cl, 3 tbl, 1 ex
FIELD: construction materials production.
SUBSTANCE: invention relates to the production of the construction materials from waists of the wood processing industry; the method comprises filler fractionating and filler processing by the water solution of copolymer vinylcyclohexene with maleic anhydride followed by drying, adjustment of the modified wooden particles with polyethylene by means of mixing and heating followed by rolling on the laboratory rollers with the roller diameter of 180 mm and gapping between them of 1 mm, pressing of the received mass in the press-mould of the hydraulic pressing unit with the mark of origin ПГ-60 at the temperature of 180-210°C and pressure of MPa; the wood-polymer composites (WPC) is induced as an ingredient increasing the mechanical and physical characteristics of the compound and resistibility to UV irradiation, and thereafter the secondary polyethyleneterephthalate in the following proportions (%, mass): secondary polyethylen: 20.0-50.0; secondary polyethyleneterephthalate: 35.0-20.0; wooden particles: 37.5-22.5; CVMA: 2.5-7.5.
EFFECT: implementation of this method allows to increase physical, mechanical and ecological characteristics of the WPC plates.
2 tbl, 1 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to woodworking industry. Proposed method comprises preparing wood particles, drying and sorting them, making modifying carbamide-formaldehyde resin-based binder, mixing it with wood particles, producing carpet and moulding plates. Carbamide-formaldehyde resin modifier is made up of PVAC dispersion-based composition with ratio of components in wt % as follows: carbamide-formaldehyde resin - 67-92; PVAC dispersion - 5-20; carbamide - 1-5: plasticiser - 1-5, and curing agent - 1-3.
EFFECT: reduced toxicity of chipboards.
7 ex, 1 tbl
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
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-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.