Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
  • B27N1/00—Pretreatment of moulding material
  • B27N1/02—Mixing the material with binding agent
  • B27N1/0227—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer
  • B27N1/0254—Mixing the material with binding agent using rotating stirrers, e.g. the agent being fed through the shaft of the stirrer with means for spraying the agent on the material before it is introduced in the mixer
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
  • B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
  • B27N1/00—Pretreatment of moulding material
  • B27N1/02—Mixing the material with binding agent
  • B27N1/029—Feeding; Proportioning; Controlling
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
  • B05B1/30—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages
  • B05B1/3033—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head
  • B05B1/3073—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to control volume of flow, e.g. with adjustable passages the control being effected by relative coaxial longitudinal movement of the controlling element and the spray head the controlling element being a deflector acting as a valve in co-operation with the outlet orifice
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
  • B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
  • B05B12/085—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to flow or pressure of liquid or other fluent material to be discharged
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
  • B05B7/02—Spray pistols; Apparatus for discharge
  • B05B7/04—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge
  • B05B7/0416—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid
  • B05B7/0483—Spray pistols; Apparatus for discharge with arrangements for mixing liquids or other fluent materials before discharge with arrangements for mixing one gas and one liquid with gas and liquid jets intersecting in the mixing chamber
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
  • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
  • B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
  • B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
  • B05B7/1404—Arrangements for supplying particulate material
  • B05B7/1431—Arrangements for supplying particulate material comprising means for supplying an additional liquid

Definitions

• the invention relates to a method for operating a system for gluing chips, fibers or fiber-like material in the course of the production of material plates according to the preamble of claim 1 and a device for gluing according to the preamble of claim 15.
• medium-density fibers or other free-flowing materials are now automated processes and have been used in many countries for years. As is known, the compression of processed chips or fibers takes place either clock-bound or continuously. In addition to the many plant components before and after the press, the production of a
• Cost-effective material plates made of natural raw materials and artificially produced binders forces producers to develop more and more efficient processes. Particular focus is on energy costs, Resource and binder savings with consistent quality and technically optimized plant construction with low downtime and low wear.
• the present elaboration refers to the area for the optimization of the binder consumption and concomitantly also with the saving of energy costs. Because with optimal gluing with low
• binder consumption but it must also be dried less binder in the dryer on the chips / fibers, which in turn saves energy and thus costs.
• binder is understood as meaning a so-called adhesive liquor which consists of an adhesive in its main component.
• adhesive liquor which consists of an adhesive in its main component.
• Isocyanates MDI, melamine urea formaldehyde (MUF), urea formaldehyde (UF), MUPF or PF.
• gluing of chips or fibers by means of spray nozzles in production facilities for chipboard or fiberboard.
• the nozzles shred the binder and spray it on moving chips or fibers.
• the chips are usually already delivered as chips or produced on site and fed to the gluing before or after drying.
• Fibers are produced by Zerfaservorraum on site and conveyed after the defibration between two grinding discs through a transport tube (English: Blow Line) to a dryer.
• a transport tube English: Blow Line
• Transport tube have a length of up to 100m.
• Transport which is preferably carried out at supersonic speed in a relatively small diameter tube diameter, the fibers are glued and then fed into a dryer. Subsequently, the chips or fibers are scattered on documents and by pressing too
• Blending of chips, fibers or fiber-like material has become known, with which the binder is to be mixed before exiting the nozzle with steam.
• the high temperature of the steam and the extremely turbulent flow in the mixing chamber of the nozzle should ensure optimum dissolution of the binder. This is especially true of the
• nozzles should be able to be used in any throughput range while maintaining the same glue consumption per throughput. If altogether the Device and the method can be practiced successfully, in turn, disadvantages in other aspects.
• a negative aspect is the constant supply of steam for the
• Profit margin can decrease significantly, due to the higher glue consumption.
• the adhesive As an equipment producer you are also dependent on large chemical companies that are in a position to dictate the prices of their glue and increase prices at regular intervals.
• the solution to this problem is for a method for operating a plant in that the method is based on which predetermined maximum possible throughput fibers / chips per unit time
• the binder before contacting the binder with the fibers or chips, the binder can be mixed with steam to a vapor-binder mixture and the binder 5 or the vapor-binder mixture dissolved in a transport tube or a mixing device via a, in particular adjustable, opening at least one nozzle and with the fibers and / or the chips is brought into contact, with up to a throughput of up to 66% of the maximum possible
• the binder is brought as a vapor-binder mixture with the fibers and / or the chips in contact.
• the solution to this problem is for the device for gluing in that at least one nozzle is arranged for gluing, wherein the nozzle via at least one opening with the mixing device or a transport tube is connectable and the nozzle at least one adjusting device for adjusting in the transport pipe or in the mixing device to be introduced amount of the binder, wherein the nozzle at least one steam line and at least one binder line are arranged, wherein the steam line and the binder line are connected to at least one mixing space and that in the steam line substantially adjacent or adjacent to the mixing chamber, a steam valve is.
• the type of gluing respectively, the wetting of the fibers / chips with binder, depending on the current throughput of fibers / chips per unit time to regulate and give the operator a sizing rule at hand from when it is is useful / necessary to use the binder as a vapor-binder mixture and when not.
• high binder throughput because the plant operates at the upper end of the maximum design, it is sufficient to use the
• Binder to atomize directly using the nozzles because the binder pressure within the nozzle is sufficiently high for optimal atomization.
• the binder throughput in the nozzles decreases because fewer chips / fibers per
• Binder nevertheless optimal. It is thus achieved that through the combination, binder for high pressure ranges / throughput, steam-binder mixture for lower pressure ranges / throughput, continuous optimum gluing with the lowest possible amount of binder with optimal optimal gluing is possible.
• the effort to produce and use steam is compared to the saved amount of binder but significantly cheaper.
• Control agents that can be used between atomization of binder and steam Switching binder mixtures is negligible in such durable systems.
• a nozzle is advantageously designed so that the mixing space, which is suitable to produce the vapor-binder mixture, can be separated from the steam line.
• black / white valves are preferably used. But it is also conceivable, depending on the type of nozzle, within the
• the presented device is not only particularly suitable for the practice of the method, but can also be operated independently and find application.
• steam can be saved, because it is not necessary at high pressures and concomitant use of the nozzles in an optimally designed operating range To add steam to the nozzles to achieve high binder dissolution.
• the invention proposes here to turn on the steam only in the performance areas in which the nozzle does not work in the optimum pressure and power ranges. It is proposed
• Nozzle area can be easily or automated, in particular prophylactically clean. Even blockages or jamming on the nozzle head are excluded or can be readily by the associated
• Figure 1 shows a section through a device according to a first
• Figure 2 is an enlarged view of the transition from the mixing chamber in the
• FIG. 3 shows a section through a device according to a second
• Figures 1 and 2 show a fundamentally possible structure of a device, inter alia, for carrying out the method consisting of a transport tube 1 with a wall 10, within which the fibers 2 are transported past at least one nozzle 3 with a flowing conveyor 20.
• a transport tube 1 with a wall 10 within which the fibers 2 are transported past at least one nozzle 3 with a flowing conveyor 20.
• the nozzle 3 has an adjusting device 4, which is in operative connection with a nozzle head 12, in the example via a plunger 11.
• the adjusting device 4 is thus able to regulate or close the size of the opening 23 via the nozzle head 12.
• Actuator 4 is not limited in its design and regarding the choice of many options (linear conveyor, crank, ball or Rack and pinion, indirect drive .%) By the expert in detail to design. It should be emphasized that in the nozzle 3, a mixing chamber 7 is arranged, can be supplied separately from each other in the vapor 6 via a steam line 17 and binder 5 via a binder line 16. Fluid and high-pressure technical designs (high-pressure pumps,
• Pressure gauges are also within the skill of one of ordinary skill in the art to identify and install those standard components that are possible or necessary according to the prior art.
• a vapor-binder mixture 15 is formed, which is preferably mixed under a predetermined pressure by a pressure preset 25 on the control or regulating device 9.
• the control or regulating device 9 controls or regulates the position of the nozzle head 12 via the adjusting device 4 and thus the size of the opening 23 on the basis of a pressure preset 25 or on the basis of a
• the device has a plurality of measuring points.
• the pressure in the mixing chamber 7 with a measuring device 8 and / or the pressure in the binder line 16 with a measuring device 14 and / or the pressure in the steam line 17 with a measuring device 18 and / or the pressure in the transport tube 1 and in the Mixing device 22 with a measuring device 13 determined.
• Transport tube 1 to be introduced amount of binder 5 controlled or regulated by a control or regulating device 4.
• a control or regulating device 4 a control or regulating device 4.
• Flow rate of the fibers 2 are set or regulated.
• the binder 5 can be supplied to the mixing chamber 7 with a lower pressure than the steam 6. This is advantageous in the dissolution and expulsion of the binder from the mixing chamber 7 by the steam. It has been found that the binder 5 should be introduced through the nozzle with a size smaller than 40 microns in the mixing device 22 or the transport tube 1.
• Figure 3 is a section through a device according to a second
• Embodiment in the normal pressure range shown with a mixing device 22 consists of a fixed drum 29 having an input for chips 24 on one side and an outlet for the glued chips 24 on the other side.
• Blades 27 on a mixing shaft 26, driven by a motor 28, are mixed and conveyed in the mixing device 22.
• a nozzle 3 in section and on the back of the opening 23 of another nozzle 3 is shown.
• dashed form is another set of nozzles 3 shown.
• the nozzle head 12 defines the opening 23 of the nozzle 3 and is moved via the adjusting device 4.
• additional steam 21 can be introduced into the mixing device 22 via an additional steam line 19 in order to convey the gluing in the mixing device 22.
• the additional steam line could also inject from below into the drum 29 to whirl up the chips.
• connection and disconnection of the steam 6 and the position of the steam valve 30 is controlled or regulated via a predetermined pressure in the mixing chamber 7 via a control or regulating device 4.
• the pressure may be in the mixing chamber 7 and / or the size of the adjustable opening 16 in dependence on the in the transport tube 1 or in the mixing device 22nd
• a control or regulating device 4 for measuring the pressures in or on the mixing chamber 7, a measuring device 8 and / or in or on the binder line 23, a measuring device 14 and / or in or on the steam line 17, a measuring device 18 and / or in or on the transport tube 1 and Mixing device 22 may be arranged a measuring device 13. It is also useful for controlling the size of the opening 23 and / or the steam valve 30, a control or To arrange control device 4.
• a control or control device 4 can be set up. Particularly preferred is arranged as a steam valve 30 in the steam line 17, a slide or a ball valve.
• the steam valve 30 of the steam line 17 may be designed for direct separation at the mixing chamber 7 and / or at least in one piece with the nozzle 3.
• Transport tube 1 is provided for the gluing of fibers or fiber-like material and the mixing device 22 for the gluing of chips, so this is not limiting, but there are a variety of

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• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Wood Science & Technology (AREA)
• Forests & Forestry (AREA)
• Mechanical Engineering (AREA)
• Dry Formation Of Fiberboard And The Like (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2011
  • 2011-04-13 DE DE102011007336A patent/DE102011007336A1/de not_active Withdrawn
• 2012
  • 2012-04-13 EP EP12713748.7A patent/EP2697022A1/de not_active Withdrawn
  • 2012-04-13 WO PCT/EP2012/056794 patent/WO2012140206A1/de active Application Filing
  • 2012-04-13 CN CN201280017960.8A patent/CN103459107B/zh not_active Expired - Fee Related

Non-Patent Citations (1)

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