• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Bonding agent foaming device has a pump which serves as a mixing pump with an output of 40m to increase the vol. of the agent in excess of 20%, the pump being followed by a stabilising of the agent/air mixt. takes place. Pref. the pump has separate inlets for the agent and air and the pump is capable of fivefold air intake w.r.t. bonding agent intake. Outlet of pump is connected to the stabilising chamber which is provided with an inlet nozzle to intensify ght flow into the chamber which is provided with 9 spaced perforated baffle plates interconnected by longitudinally extending spacers to form a mixing basket. The chamber is followed by a quiescent chamber whose outlet is connected to an applicator. A number of stabilising chambers may be arranged in series. Used for bonding wood chips for chipboard, hardboard or plywood mfr. The mixt., which can be transported, has a pot-life of >2 hrs. and its structure is maintained until application.
    公开号:SU952306A1
    申请号:SU787770322
    申请日:1978-10-10
    公开日:1982-08-23
    发明作者:Лотар Бушбек；Вольфганг МЮЛЛЕР；Томас Эйхельбаум
    申请人:Феб Фурнире Унд Платтен (Инопредприятие)；
    IPC主号:
    专利说明:

    The invention relates to devices for foaming a binder, which is used for bonding particles, granules or flat parts of wood or other organic and inorganic material in the manufacture of plates, for example, plywood, decorative, building boards or other shaped parts and similar products. 1
    Foam whippers or are known. mixing devices in which rapidly rotating mixers whip a solvent, hardener, diluent or protein bodies with added surfactants into the foam.
    For production Penov mochevi_no-formaldehyde resins, the mixing process needs to soe- 2 dinit and foam components, in spite of the fact that. the foaming components are not dissolved.
    A large number of mixing devices are known for introducing air or pre-prepared liquid foam into artificial resins. Whipping, shaking, mixing phenomena of turbulence, and installations with nets or glass balls were proposed.
    . It is known that urea or phenol-formaldehyde resin adhesives for bonding surfaces in the plywood industry can be foamed with agitators with whipping baskets in the presence of a foaming agent. The required increase in the volume of the binder can be achieved by adding water, a filler, a diluent.
    Devices are known in which artificial and thermoplastic resins are added before and after gluing wood particles by known means, which foam during pressing and fill the free space, or polyurethane is applied to the surface of the chip carpet before pressing to improve the bonding quality in the manufacture of plates.
    However, it is not possible with the known means for foaming binders to achieve a continuous and stable foaming of the adhesive and to improve the bonding strength.
    The main reasons that the introduction of foamed glue for bonding crushed materials, wooden planes or similar organic or inorganic materials has not yet been implemented are the following: the desired increase in the volume of glue can only be achieved with a relatively high concentration and percentage of foaming agents, due to which, in known devices, the bonding strength is reduced; continuous foaming of glue has not been achieved, installations with mixers require a long whipping time, devices are difficult to connect to the gluing system ·, - in addition,. during long-term operation, they are subject to interference of 15 boors and require large technical costs; it is difficult to obtain a foam of necessary stability, the destruction of the foamed binder almost 'to the initial volume occurs jq when it is fed through the nozzle or exposed to air; the optimal increase in volume, as well as the distribution and separation of foamy glue, is possible only through a strong decrease in the concentration of the binder by the introduction of water, an increase in the volume of glue due to the introduction of filler and diluent also does not lead to the desired result due to the negative impact on the quality bonding; 'θ when using glue foamed in mixers, additional foaming is detected in the plywood industry, which contributes to uneven insufficient application of the glue layer. 15 In the present invention, the disadvantages encountered in the above-mentioned devices have been eliminated or significantly reduced, and by increasing the volume, a homogeneous, stable and transportable mixture of a binder with air has been obtained. The glue-air mixture obtained in the device of the invention is stable for more than two hours and is slightly destroyed before application.
    The device implements a continuous foaming process, and its connection with modern gluing systems is carried out by simple mounting without additional equipment. It must, despite the decrease in the mass of hard resin, meet the requirements for the quality of bonding of the manufactured plates, while the humidity of the material to be bonded 55 may be higher than is usually required by technology.
    This goal is achieved by the fact that the binder-air mixture is not processed in a stationary, periodically acting mixing device, but is fed through separate lines to a mixing pump, in which the mixture is foamed and fed through a stabilization chamber to the gluing system. In this case, the pump is calculated so that it can absorb a five-fold volume of air in comparison with the amount of liquid. It is designed primarily for a pressure of more than 40 m. In a mixing pump, the mixture increases in volume by at least 20%. To obtain the desired volume of the binder mixture with air, several mixing pumps and stabilization chambers with appropriate dimensions and technical characteristics can be connected one after another.
    Preferably, a foaming agent is added to the mixture in an amount of less than 2 parts by weight per 100 parts by weight of raw glue, or added separately in an aqueous solution. If, to improve the hydrophobic properties of plates or shaped parts, a substance that protects against swelling should be added to the particles, then it is added separately from the blowing agent.
    • A stabilization chamber is connected to the mixing pump. It is made in the form of a pipe, in which a replaceable basket is installed, consisting of several perforated tin sheets or sieves integrated across the feed direction, the perforated elements being strengthened with the help of distance plates. The distance between the elements, the number and diameter of the holes are calculated from the corresponding hydraulic conditions and the desired degree of foaming. Changing the basket allows you to achieve various foaming effects, and also facilitates repair and cleaning. The inlet of the stabilization chamber is made in the form of a nozzle, in order to increase the flow rate. The glue-air mixture foams in the stabilization chamber by an additional more than 10%.
    The mixture, increased in volume by a total of more than 30%, is simultaneously homogenized and stabilized in the stabilization chamber so that it can be fed into the gluing system with a slight decrease in volume.
    The pressure of the pumps is designed so that the general course of the process, up to the transfer of the foamed mixture to the bonding system, proceeds continuously.
    In FIG. 1 schematically shows a device for foaming a binder for the manufacture of plates; in FIG. 2 - stabilization chamber, longitudinal section.
    A device for foaming a mixture consisting of urea-formaldehyde resin adhesive, a hardener solution, a foaming agent and water, contains a mixing pump 1 with a pressure of more than 40 m and made in the form of a radial disk pump, which is equipped with separate suction pipelines 2 for a binder and air . The pump 1 is designed so that it draws in approximately five times the volume of air compared to the volume of the binder. 5 Behind the mixing pump 1, a stabilization cascade 3 is placed, connected to it by a pipe 4. The stabilization chamber has the shape of a cylindrical pipe 5 with a length of 800 mm and an inner diameter of 80 mm. Its inlet 6 is made in the form of a nozzle, due to which the flow rate mainly increases, a basket 7 is built in the pipe, which can be replaced with 5 thread made of nine perforated tin sheets 8, each with 35 holes with a diameter of 5 mm. The perforated sheets were installed using distance plates 9. After foaming, stabilization and homogenization of the mixture in the steel chamber (sterilization 3, the mixture of air binder and pressure of the mixing pump 1 without significant reduction in volume, if necessary, enters the deposition apparatus 10 and then advances to the bonding system 11.
    权利要求:
    Claims (1)
    [1]
    crushed materials, wooden planes or similar organic or inorganic materials have not yet been implemented, are the following: the desired increase in the volume of glue can be achieved only with relatively high concentration and percentage of foaming agents, which, in known devices, decreases the bonding strength Dos / crucible continuous foaming of glue; installations with agitators require a long-time of beating, it is difficult to connect the device to the gluing system, in addition, with long they are subject to interference and high technical costs; it is difficult to obtain a foam of necessary stability; destruction of the foamed binder of mails to the original volume occurs when it is supplied through a nozzle or exposed to air; The optimal increase in volume, as well as the distribution and separation of foamy glue is possible only by means of a strong decrease in the concentration of the binding substance by introducing water, an increase in the amount of glue due to the introduction of filler and diluent also does not lead to the desired result due to the negative effect on the bonding quality. ; When using glue foamed in mills, additional foaming is found in the plywood industry, which contributes to the uneven insufficient layer of glue. In this invention, the disadvantages introduced by the applied devices are significantly reduced, and by increasing the volume of the obtained homogeneous, stable and transportable mixture of the binder substance with air. The glue-air mixture obtained in the proposed device is stable for more than two hours and is insignificantly destroyed until the moment of application. The device implements a continuous foaming process, and its connection with modern gluing systems is carried out by simple mounting without additional equipment. It should, despite the decrease in the mass of solid resin, meet the requirements imposed on the quality of bonding of the manufactured plates, while the moisture of the material being glued may be higher than is usually required by technology. This goal is achieved by the fact that the mixture of the binder with air is not processed in a stationary, periodically operating mixing device, but through separate lines is fed into a mixing pump, in which the mixture is foamed and fed through a stabilization chamber to the gluing system. At this time, the pump is calculated so that it can suck up five times the volume of air compared to the amount of liquid. It is designed primarily for pressures greater than 40 m. In a mixing pump, the mixture is increased in volume by at least 20%. To obtain the desired volume of the binder-air mixture, several mixing pumps and stabilization chambers can be connected one after the other with appropriate dimensions and technical characteristics. Advantageously, a sifter is added to the mixture in an amount less than 2 parts by weight per 100 parts by weight of raw glue, or added separately in an aqueous solution. If a substance that protects against swelling is to be added to the particles to improve the hydrophobic properties of the plates or shaped parts, then it is added separately from the blowing agent. - A stabilization chamber is connected to the mixing pump. It is made in the form of a pipe in which a replaceable basket is installed, consisting of several perforated rigid sheets or sieves that are built in across the direction of flow, the perforated elements being reinforced with the help of spacer bars. The distance between the elements, the number and diameter of the holes is calculated from the corresponding hydraulic conditions and the desired degree of foaming. Change basket. allows to achieve various foaming effects, and also facilitates repair and cleaning. The inlet of the stabilization chamber is made in the form of a nozzle in order to increase the flow rate. The glue-air mixture foams more than 10% in the stabilization chamber. The mixture, increased in volume by a total of more than 30%, is simultaneously homogenized and stabilized in the stabilization chamber so that it can be fed into the gluing system with a slight decrease in volume. The pump head is designed so that the overall process, up to the transfer of the foamed mixture into the gluing system, proceeds continuously. FIG. Figure 1 shows schematically an apparatus for foaming a binder for making slabs; in fig. 2 - stabilization chamber, pro ;, longitudinal section. The device for foaming a mixture consisting of urea-formaldehyde resin glue, hardener solution, foaming agent and water contains a mixing pump 1, having a pressure of more than 40 m and made in the form of a radial disk pump, which is equipped with separate suction pipes 2 for connecting and air. Pump 1 is made so that it draws in about five times the volume of air compared to the volume of the binder. Behind the mixing pump 1 there are 3 stabilizations, connected with it by pipeline 4. The stabilization chamber has the shape of a cylindrical tube 5 with a length of 800 mm and an inner diameter of 80 mm. Its inlet opening b is in the form of a nozzle, due to which the flow velocity advantageously increases. Basket 7, which can be replaced, is made of nine perforated rigid sheets 8, each with 35 holes 5 mm in diameter. The perforated sheets are installed using spacer bars 9. After the mixture is foamed, stabilized and formed in the cell of the station (bilization 3, the mixture of binder with air and pressure pressure of the mixing pump-1 without a significant decrease in volume, if necessary, enters the apparatus, 10 for sedimentation and then advances to the gluing system 11, claims 1. An apparatus for foaming a binder for the manufacture of plates, comprising a pump, such that the pump is designed as a mixing pump 1, preferably with a pressure of more than 40 m for foaming the binder with a larger volume by more than 20%, and the device is equipped with a stabilization chamber 3 connected to the pump for foaming with an increase in volume of more than 10% and homogenizing the mixture, 2 Device according to claim 1, characterized in that the mixing pump is provided with suction pipes 2 for binder and air, the volume of intake air being five times larger than the volume of binder, 3, Device-according to claim 1 and 2, characterized in that the stabilization camera a replaceable basket 7 made of perforated elements And located across the mixture flow at a distance from each other, 4, The device according to claims 1, 2, and 3, characterized in that, in order to increase the flow rate, the inlet 6 of the stabilization chamber made in the form of a nozzle. 5, a device according to claims 1-4, characterized in that it is additionally equipped with pumps and stabilization chambers arranged in series; 6, a device according to claims 1-5, characterized in that the foaming agent is prepared separately and added to a liquid Wednesday, 7, The device according to PP, 1-6, which is equipped with an apparatus for deposition 10 installed behind the stabilization chamber. It was recognized as an invention according to the results of the examination carried out by the Office for Inventions of the German Democratic Republic,
    类似技术:
    公开号 | 公开日 | 专利标题
    CA2927474C|2019-01-29|Method of producing ultra-low density fiber composite materials
    DE19957329B4|2005-12-22|Wood material and manufacturing process for it
    US20040258898A1|2004-12-23|Fire retardant composite panel product and a method and system for fabricating same
    SU952306A1|1982-08-23|Apparatus for foaming binding agent for producing plates
    CN103635295A|2014-03-12|Fire proof oriented strand board and its manufacture
    RU2385329C2|2010-03-27|Urea-formaldehyde resin polymerisation enhancing composition, method of production, method of use and product made from such resins
    CN105666697B|2019-06-25|A kind of foam concrete preparation system and method
    CN105612285A|2016-05-25|Lignocellulosic materials containing defibrillated cellulose
    KR20140110001A|2014-09-16|Lignocellulose materials comprising expanded plastic particles non-homogeneously distributed in the core
    US20110165411A1|2011-07-07|Process for the preparation of a panel
    US7513488B2|2009-04-07|Foaming method and device
    US20090324874A1|2009-12-31|Process for the preparation of a panel
    CN105209226B|2019-04-23|Method and apparatus for glued particle
    US20060127659A1|2006-06-15|Mdf press technology
    US8840820B2|2014-09-23|Foamed binder and associated systems and methods for producing a wood product
    KR20140107606A|2014-09-04|Lignocellulosic materials with lignocellulosic fibers in the outer layers and expanded plastics particles present in the core, and process and use thereof
    CN1298519C|2007-02-07|Methods of straw fiber processing
    US10953568B2|2021-03-23|Method for producing MDF boards with NFC/MFC
    RU2552014C2|2015-06-10|Method and device for wet application of glue on wood fibres
    ES2367856T3|2011-11-10|BASE MATERIAL, ITS PREPARATION PROCEDURE, AS WELL AS ITS USE.
    EP0259042A2|1988-03-09|Process for bonding lignocellulosic material
    FI76109B|1988-05-31|FOERFARANDE FOER LIMNING AV MASSIVTRAE OCH LIMHARTSER SOM INNEHAOLLER POLYSACKARIDER.
    CN207478395U|2018-06-12|A kind of formaldehyde-free glue mixing device
    JPH06285890A|1994-10-11|Manufacture of molded from by waste paper fibrillated pulp
    US584399A|1897-06-15|John g
    同族专利:
    公开号 | 公开日
    PL210831A1|1979-07-16|
    IT7851829D0|1978-11-08|
    DD133301A1|1978-12-27|
    IT1109269B|1985-12-16|
    ES474989A1|1979-04-01|
    DE2848038A1|1979-05-17|
    FI783434A|1979-05-11|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3137109C2|1981-09-18|1991-08-14|Gebrueder Loedige Maschinenbau-Gesellschaft Mbh, 4790 Paderborn, De|
    DE3425078A1|1984-07-07|1986-02-06|Bernhard 7913 Senden Holz|DEVICE FOR PRODUCING FOAM|
    FI104835B|1997-01-14|2000-04-14|Neste Chemicals Oy|Lignin-based binders for the production of particle board|
    FI104834B|1997-01-14|2000-04-14|Neste Chemicals Oy|Lignin-based binders and their manufacturing process|
    AU2003239781A1|2003-06-24|2005-01-04|Agro Biomass Consult Aps|Method for mixing and homogenisation of binding agents and additives|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DD7700201994A|DD133301A1|1977-11-10|1977-11-10|DEVICE FOR DISPENSING BINDER FOR PLATE MANUFACTURING|
    [返回顶部]