Method of and device for steam treatment

FIELD: construction.

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

 

The technical field

The invention relates to a manufacturing method and a corresponding device for structural elements made of wood material, such as fiber or chips, as well as a constructive element manufactured by the above method. In particular, the invention relates to the plates, made of wood fibers.

The level of technology

A typical known method for manufacturing slabs of wood fibers is known from the article in the trade magazine NC 1/88, p.74-75 "Manufacture of medium density fibreboard". Cooked chips served in the so-called refiner. Refiner chips under the influence of temperature and pressure using the rubbing disk turns into a fiber. From the refiner fibres are removed by means of steam and sent down the pipeline, called "Blow-Line. The steam pressure is about 10 bar. The temperature is maintained within 150-160°C. In "Blow-Line" is added to the glue. As an adhesive used phenol-formaldehyde resin, urea resin and mixed resins based on urea and melamine. After adding glue "Blow-Line expands. The expansion causes turbulence. Glue is mixed with the fibers. The share of adhesive relative to the fibers is about 22% by weight.

Fibers, mixed with glue, serves layers in formulaone the machine. Pressing fibers is preferably in two stages. At first it may be an optional step of pre-pressing. Then pre-pressed fiber under high pressure and heat input is pressed the oven.

Device for applying adhesive in the manufacture of wood-fiber plates is known from the document EP 0744259 A2. A method of manufacturing slabs of wood material described in document US 5554330. In the document GB 791554 described method of mixing solid and liquid components. Description of a device for the continuous coating of adhesive on the wood chips contained in document DE 4115047 C1. Method for continuous mixing of particle and fiber materials with a binder can be found in document DE-OS 1956898. Removing glue from wood-based materials are described in PCT/1B 98/00607 and WO 98/37147.

The way to reduce time compression due to the preheating is carried out as follows.

Before the fibrous material is coated with a glue will go on dvuhnitochnyj press for the manufacture of medium density fibreboard or similar products manufactured prior to pressing. For this there are two conveyor belt, arranged one above the other. The pre-pressed material is supplied for this purpose between the two tapes. In the tapes of the conveyor ball has the s or holes, through which passes the hot steam. Hot steam gets in the surface zone of pre-compression of the material. This provides preheating of the material. In the preheating, you can further reduce the time spent on the basic process. And because the material contains moisture, heat can besides due to moisture stronger, better, and therefore faster to penetrate into the material. Therefore, pre-hydration increases the conductivity of the compression of the carpet.

Another advantage of the method of humidification is that can be obtained more solid top layers without the cost of a relatively large quantity of timber. If purposefully to spray or wetting of the surface but the inner part (core) to leave during pressing is relatively dry, it will be purposeful to pressoffice and prosnetsja surface. Wet material is easier pressed than dry. Thanks compacted, and therefore be harder than the surface area.

Methods preliminary steam treatment described in the documents DE-OS 4441017, US 111795, as well as in Danish patent application No. 0302/97.

DE-OS 2058820 describes the use of hot gases in presses of continuous operation. Superheated steam is supplied to the compression material through p is lowering gas tape screen, moreover, a gas supply occurs in the zone of hardening and calibration, i.e. in the zone of high compaction of the main press is a continuous action. Leaking gas belt design forms on surfaces made fiberboards labeled surface structure, which has then soshlifovat with the expenditure of considerable effort.

DE-PS 3914106 refers to the preliminary heating of the compression carpet steam pulse, i.e. produced in a pulsatile manner pairs, which are not perforated and solid steel tape. Therefore, the finished pressed plates is formed labeled surface structure. However, this is difficult to heat in the compression carpets due to the fact that steel tape don't miss a couple, and this leads to increase time compression.

DE 4441017 A1 also relates to an apparatus for the continuous production of plates from heated materials, in which the compression of the carpet is pre-heated while pressing the pair of pulses directed perpendicular to the vapor permeable tape sieve. But this can lead to blowing the fibers of the compression of the carpet under the action of steam pulses, resulting in reduced surface quality of the finished fibrous plates and polluted setting.

R is hiding inventions

The task of the invention to provide an improved, implemented faster and more economical method of manufacture plates of the aforementioned type, and device for implementing this method and manufactured according to this method, a constructive element.

According to the invention proposes a device for steam processing of moving relative to the device canvases to direct steam impulse, i.e. produced in a pulsatile manner pairs, not perpendicularly but obliquely, at an angle to the surface of the canvas. When steam pulse is directed at the surface, consisting, for example, from the impregnated adhesive fibers lying on the conveyor belt, not perpendicular, less blown fibers from the fabric, which can be non-woven felt, fibrous Mat or take a carpet. Reduced material consumption, improves the surface quality of the finished product and reduces the pollution production equipment flying blown fibers. Holes for steam to escape are designed to accelerate and guide in the right direction pairs sent from the tank to the canvas.

The canvas in the sense of the present invention is called the upper or lower side of the nonwoven material, which is served in the press, in particular in the calender press. The angle is oblique (in the sense of izobreteny is), if it is greater than 0° and less than 90° in any direction relative to the surface. The experiments showed that the most favorable results are obtained when the angle between 20° and 60°. Favorable results are when compared to the vertically directed pulse pair decreases the amount of blown fibers and ground deformation, and at the same time ensures the penetration of hot steam into the fabric, allowing you to reduce the pressing time. The direction of the blast of the steam pulse can be anything, ie, for example, toward or across the direction of movement of the canvas. By experiments it was found that the faster moving conveyor belt, and therefore the faster moves the canvas relative to the steam head, the less can be done in the corner. For example, in calender presses especially good results were obtained at angles ranging from 45° to 60°especially when the angle 53° when the speed of the conveyor 55 m/min, and in the range from 20° to 40°especially at the angle of 30° when the speed of the conveyor 60 to 70 m/min

Too large, i.e. too steep angles lead to the formation of streaks and pools or wells, as loose fibers, which remained glue can be washed out.

Preferably, steam impulse was directed towards the direction of movement of the blade. While HC is growing speed of the particles of steam to the fabric, due to the increasing depth of penetration of steam. This increases the energy density per unit surface area. This causes, on the one hand, the introduction of more energy, i.e. the greater the heating of the edge zones of the surface, and on the other hand, the thickening of the surface layer with enhanced conductivity due to penetrating moisture. As a consequence, in the main press heat required for curing, can be introduced into the fabric faster and deeper.

Further reduction in the time compression is achieved if possible steam treatment of the surface on both sides.

Hole placement steam release on the rotary steam head or steam surface allows you to easily adjust the angle of the airflow. On the one hand, the possibility of turning means establishing an optimum angle of airflow during installation to achieve a certain result, for example in case of change of the plate thickness from 10 mm to 20 mm or changes in the composition of the binder. On the other hand, the possibility of rotation also means that, for example, when mounting the unit can be set once and for all angle blower designed for specific application conditions, which cannot be changed. For the manufacturer of such devices steam processing this implies the advantage that it is not well what to include different ways steam heads for different applications, and it can apply a single standard steam head.

In one embodiment, the axis of rotation of the steam heads are made so that you can change the angle against the direction of motion of a floating canvas. This reduces the complexity of installation and the probability of erroneous actions in the service.

In one constructive variant, the actuator for changing the direction of the steam pulse. This increases the flexibility of the device prior to the steam treatment, as this solution allows for more responsive to changing operating conditions by means of the control device, for example a computer or potentiometer. Control devices control actuator. For example, if the potentiometer is set to 30°then the control unit will ensure that the actuator has established outlet for steam in such a way that the steam pulse was sent to the canvas at an angle of 30°.

Device management can act and so that they reflect certain through experiments results. For example, the potentiometer may be scale with different relative speeds. When installing on a scale of a certain relative speed of the actuator is controlled in such a way that for provopoulos a certain set empirically the optimum angle.

The control device can, of course, to take into account several different parameters, such as relative velocity and the thickness of the blade. Device control can be implemented so that the user found the optimum angle in the table and he installed it. This table can be programmed in the computer that will allow you to avoid mistakes when serving.

In one embodiment, the implement is provided, in addition, sensors that, at least, determine the relative speed and/or the thickness of the material, which again will prevent erroneous interpretations of man. In addition, the advantage of using sensors is that the necessary parameters to establish the optimal angle can be reported accurately, without the risk of human error. This can be ensured by continuous optimization of the process. Although under normal operating conditions parameters such as speed and the thickness of the canvas remain constant, continuous optimization of the steam pulse can be very useful in a test operation, when experimental purposes all the time changing parameters such as, for example, the thickness, composition or speed.

In one of the other options offered when determining the best angle to take into account several parameters, in particular the speed of the tape to which nijera, the pressure of the pressure roller, in particular in the calender presses.

Another variant provides that the cloth is non-woven fibrous material for the manufacture of construction elements plate shape, especially particleboard and fiberboard of medium to high density. The proposed method allows to produce such plates are particularly economical, because thanks to the optimised method of pre-steam treatment without the usual drawbacks, the pressing time can be reduced by half, from 7 to 3.2 with 1 mm thickness plate.

Moving synchronously with cloth tape screen facilitate pre-sealing non-woven material, move it towards the press, partly permeable to steam and momentum at the same time retain the form of non-woven material. The cell size should be selected depending on manufactured products so as to ensure sufficient permeability to steam, and at the same time not formed gullies and blowing fibers under the action of water vapor. The cell size from 1/10 to 5/10 provides a relatively small diameter holes, that they could not pass the fiber, and the sieve was able to transport and guide the carpet. At the same time, this cell size provides steam processing.

Tape screen on the top and on the bottom side of the fabric contribute to the t enhanced pre-heated blade. Tape screen in the sense of the invention are all means suitable for implementing the above-mentioned effects, and consequently, also permeable to pair woven tape.

Due to the presence of exhaust devices for removal of waste from tape screens to prevent clogging of the holes and provides a uniform action of steam. Therefore, it is useful to provide a hood on both sides of the tape.

In another embodiment, to a couple of added additives to intentionally alter the surface properties of the plates, manufactured from a cloth by pressing. By supplements of certain substances, the surface can be made, for example, is harder. This, in particular, improves the insulation against impact noise. And, in General, a hard surface floor is always desirable. Using supplements can also purposefully to reduce the tendency to swell. The less swelling, the greater the stability and moisture resistance of the material, pressed into the plate. In thin plates with a thickness less than 5 mm additives may contain substances on the basis of sulfate. They accelerate the solidification of the surface, in particular, due to the sulfate. In thin plates chlorides react too quickly, which can lead to undesirable formation of hydrochloric acid.

For thicker plates, whose thickness exceeds 5 mm, on the contrary, apply ve is esta chloride, precisely chloride has an accelerating effect. It was found that the use of chloride is particularly effective at low speeds calender press. Low speed is less than 30 m/min

As additives can be used as wetting agents, such detergent Pril®to reduce surface tension. The improved wetting of the entire surface as a whole promotes better sealing surface area and thereby obtaining a smoother surface.

Improved compaction of the surface layer can also be achieved by using silicone, which you can add to water vapor, especially in a liquefied state.

Due to the addition of additives to steam concentration in the canvas as the distance from the surface decreases as they are used mainly in a zone close to the surface.

The proposed device for pre-steam treatment and the appropriate method is especially suitable for the production of wood structural elements in the form of plates, manufactured by pressing, for example, calender presses. Here, as experience has shown, it is possible to reduce the pressing time by 50%.

If pre-steam processed immediately before pressing the cloth, the cloth before the pressing process cools the nose slightly. The higher the temperature of the fabric before pressing, the faster you can perform pressing. Thus, steam treatment, produced directly before pressing, it should be understood that the energy deposited into the fabric of the initial steam treatment, only in a very slight degree goes before pressing into the environment. Pre-steam treatment must be installed before the press, because the press, in which, as a rule, are typically impervious to a pair of steel strips, steam cannot penetrate through the tape. The use of perforated tape is impossible, because it will not allow you to get a smooth surface.

Sandwich panels are now becoming more and more popular, especially as floor coverings, and therefore are produced in large quantities. In this case we have in mind plate, which can be especially economical to produce in accordance with the invention and which are covered by a decorative layer, for example, from real wood, or by printing on the front side with a wear resistant layer on top of the decorative layer, as well as with paper to protect the floor from warping, laid under the slab.

To further reduce the pressing time can in steam processing of fabric with obey the parties.

Further advantages emerge from the following description and the accompanying drawing. Mentioned above and also the following signs can also according to the invention be used both separately and in any combination with each other. Examples of implementation are not limiting value and serve only as examples, while the drawing shows a schematic illustration of a calender press to set before him install steam treatment according to the invention.

Preliminary pressing below 90° mainly because the binder does not harden prematurely.

The implementation of the invention

The device and method can be implemented as follows.

Pre-coated adhesive fibers are received in one or more separators, not shown in the drawing. From the separators pre-coated adhesive fiber serves not depicted on deck station. Deck station transmits a pre-coated adhesive fibers on the conveyor. Belt conveyor transports the fiber is not depicted podpisovanie press. Here the fibers are pressed normally 2/3. Podpisovanie press consists of a not shown rotary belts, between which are ignored fibers, which are pressed, forming a fibrous rookwise fibrous Mat. After that, the fibers pass through not shown moulding line, where there are various devices, giving the fibers to the desired shape. Moulding line passes fibrous material in the unit 1 steam treatment according to the drawing in accordance with the invention. Here the fiber is treated with steam from above at an oblique angle. Fiber can also be divided parallel to the conveyor belt and, thus, processed steam "inside", which is not shown. For illustrative purposes the unit 1 steam treatment is shown only on the upper side of the sheet 3, but may, of course, be placed at the same time and from the bottom side of the canvas.

The unit 1 steam treatment consists largely omitted by using the actuator 12 steam surface or steam head 11 from which on the lower side may enter par. In order not to damage the steam head is still soft surfaces 3, moving the drawing to the right, between the steam cylinder 11 and the blade 3 is held rotatable tape 13, moving synchronously with the canvas 3. In rotating the tape 13 has holes for the passage of steam, her guide and pull the drive shaft 14a, the guide roller 14b and idler or guide roller 14C.

Thus it is essential to avoid any relative movement between the sheet 3 and resting element and, for example, a steam surface 11 or the rotary sieve belt 13. The actuator 12 allows to adapt to different thickness and geometry of the plates and can even be used for some compaction of the Mat. The feed conveyor belt 4 on the lower side moves, of course, along with the canvas, and if you install the steam treatment device from the bottom side of the blade 3 can also be made in the form of tape screen.

Exhaust devices 15A and 15b on both sides of the rotating belt sieves device prior to steam treatment to produce the cleaning of fibers, chips and similar deposits in order to prevent clogging of the pores or irregularities on the surface of the plate.

In the pre-steam treatment may include various sensors connected to the Central unit 16 controls. This control unit regulates the steam flow, steam temperature, speed of supply tape screen 13 and the actuator 12 depending on the desired result, the thickness of the plate and plate material.

Pre-compacted fibrous Mat 3 after wetting out of the feed belt conveyor 4 through table 5 arrives at the main press, which in the drawing is depicted in the form of a calender press.

Processed the arene fiber fall, finally, on the main press, consisting of a rotating steel belt 21 and prijigauschee to her heating drum 22. Here is pressing at a temperature usually in excess of 150°C. Rotating the tape is directed by rollers 23a-23C, tensioned roller 23rd and driven roller 23f. The rollers 23a-23C and 23f direct rotating the tape 21 against the big contrapasso drum 22 which serves as both a heating drum. To improve the surface quality can be additional wider rollers 23g around the heating drum for more pressing belt 21.

Instead of a calender press can be applied to any other media, applicable in the art, such as a double belt press.

Then hardened to a plate of fibrous fabric 3 cut through not shown saw machine and is brought to the station-keeping. At the station-keeping plates are maintained, not touching each other. So the plates are cooled.

In conclusion of the plates may, for example, be created panel. This plate may, for example, coated paper, reprivatise further and be equipped by milling connecting elements. Such panels can be used to cover walls or floors.

1. Device for steam processing of moving relative to the device of cloth with holes for steam to escape to create steam pulse directed onto the canvas, characterized in that the holes for the pair located on the steam head, are pivoted, in particular with respect to an axis perpendicular to the direction of movement of the blade and parallel to the plane of the canvas, with the possibility of sending steam pulse at an oblique angle relative to the canvas.

2. The device according to claim 1, characterized in that the pivoting steam head is made with the possibility of sending steam pulse at an angle against the direction or in the direction of movement of the canvas.

3. The device according to claim 1 or 2, characterized in that the holes for the output pair are located on both sides of the canvas.

4. The device according to claim 1, characterized in that the device has, or can be attached to the actuators, in particular electrical, hydraulic or pneumatic actuators for changing the angle of the steam pulse.

5. The device according to claim 1, characterized in that the device has, or can be connected to the control means, in particular computers or potentiometers to change the angle of the steam pulse.

6. The device according to claim 5, characterized in that the means UE is Alenia, in particular computers or potentiometers, connected to actuators or can be connected thereto.

7. Device according to one of claims 4 to 6, characterized in that the controls and actuators interact with adjustable angle, in particular automatic control, depending on the relative speed and/or thickness of the canvas.

8. The device according to claim 7, characterized in that it comprises control means, including computer, which laid the table of correspondences between different relative speeds and/or thick canvas and different angles so that each relative speed and/or each relative to the thickness of the blade corresponds to the optimum from the point of view of the production process corner.

9. The device according to claim 8, characterized in that provided by the sensors to determine a favorable regarding the production process of the angle for each relative speed and/or the relative thickness of each blade.

10. The device according to claim 9, characterized in that the sensors, controls and actuators interact with the ability to set the angle, in particular automatically set, depending on the relative velocity.

11. The device according to claim 9 or 10, characterized in that the angle is determined is based on one of the following parameters: the relative speed, the thickness of the object, forming fabric, the provisions of the fibers, the length of the fibers, type of fibers, the sizing of the fibers, the humidity of the surface.

12. The device according to claim 9, characterized in that the sensors can be determined one or more parameters.

13. The device according to claim 1, characterized in that the sheet is a nonwoven material, of wood particles, fibers, shavings or sawdust and binder for the manufacture of plate preferably of structural elements, in particular fiberboard and particleboard, medium and high density.

14. The device according to claim 1, characterized in that between the hole for steam release and a cloth tape provided sieve adjacent to the canvas, moving synchronously with the canvas, and through which steam pulse can interact with the canvas.

15. The device according to claim 1, characterized in that on both sides of the fabric between the holes for steam to escape and the surface of the canvas provides tape screen, adjacent to the canvas, moving synchronously with the canvas, and through which steam pulse can interact with the canvas.

16. The device 14 or 15, characterized in that the tape provided sieves with mesh size 1/199-1/50.

17. The device according to claim 1, characterized in that to a couple of added additives on the basis of sulfate, chloride, detergent or silicone, call the residential property change plates, obtained by pressing from the fabric, for example, surface hardness, protection against noise, or swelling.

18. Device for steam processing of moving relative to the device of cloth with holes for steam to escape to create steam pulse directed onto the canvas, characterized in that the holes for the pair located on the steam head, made with the possibility of sending steam pulse at an oblique angle relative to the canvas, and between the fabric surface and holes for steam to escape provided by the tape sieve adjacent to the blade and moving synchronously with the canvas, while the steam pulse can interact with the web through the specified tape sieve.

19. The device according to p, characterized in that the steam head is made with the possibility of sending steam pulse at an angle against the direction or in the direction of movement of the canvas.

20. The device according to p or 19, characterized in that the holes for the output pair are located on both sides of the canvas.

21. The device according to p, characterized in that the steam head are pivoted, in particular with respect to an axis perpendicular to the direction of movement of the blade and parallel to the plane of the canvas.

22. The device according to p, characterized in that the device has, or can be connected thereto, actuators, in particular electrical, hydraulic or pneumatic actuators for changing the angle of the steam pulse.

23. The device according to p, characterized in that the device has, or can be connected to the control means, in particular computers or potentiometers to change the angle of the steam pulse.

24. The device according to item 23, wherein the control means, in particular computers or potentiometers, connected to actuators or can be connected thereto.

25. Device according to one of PP-24, characterized in that the controls and actuators interact with adjustable angle, in particular automatic control, depending on the relative speed and/or thickness of the canvas.

26. The device according A.25, characterized in that it contains management tools, including computer, which laid the table of correspondences between different relative speeds and/or thick canvas and different angles, so that each relative speed and/or each relative to the thickness of the blade corresponds to the optimum from the point of view of the production process corner.

27. The device according to p, characterized in that provided by the sensors to determine a favorable relative to production is the result of a process corner for each relative speed and/or the relative thickness of each blade.

28. The device according to item 27, wherein the sensors, controls and actuators interact with the ability to set the angle, in particular automatically set, depending on the relative velocity.

29. The device according to item 27 or 28, characterized in that the angle is determined by one of the following parameters: the relative speed, the thickness of the object, forming fabric, the provisions of the fibers, the length of the fibers, type of fibers, the sizing of the fibers, the humidity of the surface.

30. The device according to item 27, wherein using the sensors can be determined one or more parameters.

31. The device according to p, characterized in that the sheet is a nonwoven material, of wood particles, fibers, shavings or sawdust and binder for the manufacture of plate preferably of structural elements, in particular fiberboard and particleboard, medium and high density.

32. The device according to p, characterized in that on both sides of the fabric between the holes for steam to escape and the surface of the canvas provides tape screen, adjacent to the canvas, moving synchronously with the canvas, and through which steam pulse can interact with the canvas.

33. The device according to p or 32, characterized in that the tape provided sieves with mesh size 1/199-1/0.

34. The device according to p, characterized in that to a couple of added additives on the basis of sulfate, chloride, detergent or silicone, resulting in altered properties of the plates, obtained by pressing from the fabric, for example, surface hardness, protection against noise or swelling.

35. Using a device, as claimed in any one of claims 1 to 34, as the device prior to steam treatment in the manufacture of structural elements, in particular lamellar form, containing wood particles, fibers, shavings or sawdust and binder for production in particular fiberboard and particleboard, medium and high density.

36. Using a device, as claimed in any one of claims 1 to 34, as the device prior to steam treatment in the press, in particular in the calender press.

37. The use of the device for p or 36, and the device is located so that pre-steam processing occurs directly before pressing cloth.

38. Method for optimizing continuous process for the manufacture of structural element, in particular a plate, which contains wood particles, fibers, shavings or sawdust and hardening under influence of heat binder, in particular fiberboard and particleboard, medium and high density, including the manufacture of nonwoven material containing particles with wasysym, preliminary pressing, preferably continuous, non-woven material in pogressive.com press, in particular, without curing the binder, continuous pressing of non-woven material in a hot press, and non-woven material mainly is pressed to a predetermined thickness, and a binder mainly hardens, steam processing one or both surfaces of the nonwoven material in the pre-steam treatment immediately prior to entry into the hot press, which is equipped with holes for steam to escape to create steam pulse is directed to a nonwoven material, characterized in that the steam pulse is directed at an oblique angle to the surface of the nonwoven material through the holes allow steam to escape, which located on the steam head, are pivoted, in particular with respect to an axis perpendicular to the direction of movement of the nonwoven material and parallel to the surface of non-woven material.

39. The method according to 38, wherein the angle is chosen so that it was optimal as regards the production of the result, for example, the degree of plasticization, the density of surface or bandwidth of the press.

40. Structural element, in particular a plate, consisting primarily of wood fibers and glue, made with the help of the device C is shown in any one of claims 1 to 34.

41. Multilayer panel, in particular floor covering, made of a structural element in the form of a plate, as claimed in p, with a decorative coating on the front side, preferably with a wear resistant layer on top of the decorative layer, and in particular with paper to protect the floor from warping, laid under the slab.

42. Multi-layered panel according to paragraph 41, characterized in that it contains a chloride, sulfate, wetting agent and/or silicone.

43. Multi-layered panel according to 42, characterized in that there is a concentration gradient of chloride, sulfate, wetting means and/or silicone in the direction of thickness of the plate.



 

Same patents:

The invention relates to the production of chipboard-based particles of vegetable origin, in particular to press the composition and method of production of composite materials based on it

The invention relates to the production of chipboard-based particles of the wood plates differ in low emission of harmful and toxic substances

The invention relates to the production of wood pressing mass-based particles of vegetable origin, in particular to press composition, its preparation and method of production of composite materials based on it

The invention relates to the continuous production of cardboard by a dry process using as raw material lignocellulosic material such as wood, straw, sugar cane etc

The invention relates to woodworking, and more particularly to equipment for the manufacture of hardboard, particle Board or other, made from plant or wood materials, wood panels or similar materials, and can also be used for heat treatment and conditioning of other materials, such as plywood or wood veneer

FIELD: construction.

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

Cooler for trays // 2335392

FIELD: heating.

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

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

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.

2 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to production of wood-filled composite materials based on timber wastes and mineral binders. Proposed method comprises mixing wood filler with binder. Filler is treated in tight chamber in atmosphere of flue gases at 190-200C for 50-60 minutes. Then, prior to mixing, filler is processed in plasma-forming gas flow in discharge chamber at high-frequency generator power of 200-600 W and vacuum of 100-130 Pa for 250-280 s. Air is used as said plasma-forming gas fed at flow rate of 0.08-0.12 g/s. After mixing of filler and binder, molding and heat treatment are performed.

EFFECT: higher strength.

1 tbl, 2 ex

FIELD: process engineering.

SUBSTANCE: invention relates to jointing the ends of wood sheet materials, particularly, to making mate grooves at said ends. Proposed method comprises, at least, driving the groove at end of said sheet material by rotary cutting tool. Note here that warped section of said end is leveled by clamping plate. This allows avoiding deep cutting and ensures equal size and shape grooves.

EFFECT: higher strength and reliability of joint.

4 cl, 25 dwg

FIELD: process engineering.

SUBSTANCE: invention relates to preheating of material laid over continuous circulating moulding mat belt in production of particle boards. For preheating of mat material on one or both sides microwave radiation is introduced therein. Material mat is compacted and hardened after feed into continuously operating extruder at definite pressure and temperature. For heating said mat microwaves in frequency band of 2400-2500 MHz are used. Said microwaves for every surface of said mat are generated in 20-300 microwave generators with 3-50 kW magnetrons each. Used heater is composed of continuous operation through-type furnace. 20-300 microwave generators with 3-50 kW magnetrons are arranged inside the furnace on every side to operate in 2400-2500 MHz frequency band.

EFFECT: higher efficiency of heating.

25 cl, 3 dwg

FIELD: metallurgy.

SUBSTANCE: invention relates to methods and devices for affecting processing characteristics of individual regions of sheet materials. Method includes fixing on work bench sheet material, or pre-compacted material or material in form of a fibrous mass. Placing at least one applicator on upper and/or lower sides of material. Applicator is moved from upper and/or lower side of material and improving medium is fed under pressure into separate areas of materials. Compression performed on pre-compacted material or material in form of a pulp sheet to form a predetermined thickness.

EFFECT: ensuring efficiency of action on separate areas of materials by providing a sealing system.

40 cl, 7 dwg

FIELD: wood industry.

SUBSTANCE: pressed product package is poured on circulating forming belt conveyor by means of the dispersing device. Package of pressed material during transportation to the press by means of the sealing device is compacted to its narrow sides transversely to the production direction. The narrow sides in the direction of production are cut along the edges using for trimming device before the sealing device. Installation for manufacturing panels comprises a press device and dispersing device. Between the press and dispersing device, there is a sealing device for sealing the package material to be pressed. The device for trimming is arranged in the production direction before the sealing device. A device for sealing the narrow sides of the pressed material package comprises means for sealing the package material to be pressed.

EFFECT: increased strength plates.

16 cl, 7 dwg

Up!