• 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:
    Poorly conducting substances, such as chips of cellulose material containing a heat hardenable binder, are heated by passing them between the plates of an operational capacitor supplied with energy from a high frequency generator. An adjustable auxiliary capacitor is connected in parallel with the operational capacitor and is adjusted to match the capacity of the output circuit to the generator with changing conditions of the poorly conducting substances. Coarse initial control is effected by adjusting the separation of the plates of the operational capacitor. The apparatus is especially useful for making chip boards and the like in which a precompressed mass of chips is passed between the plates of the operational capacitor sandwiched between two endless belts.
    公开号:SU878187A3
    申请号:SU772616254
    申请日:1977-05-17
    公开日:1981-10-30
    发明作者:Ламбертс Курт；Леппин Юрген；Гретен Берндт；Нойбауер Харри
    申请人:Бизон-Верке Бэре Унд Гретен Гмбх Унд Ко,Кг (Фирма)；
    IPC主号:
    专利说明:

    (54) DEVELOPMENT FOR CONTINUOUS MANUFACTURING The invention relates to woodworking in industry and can be used in the manufacture of wood chipboards. A device comprising a chip car forming station, a chip carpet carrier in the form of a conveyor, a forpress, a high frequency generator connected to its output and driven by a plate of a working capacitor between which the conveyor belts and the press mechanism l are known is known. However, the known device is characterized by an insufficiently uniform heating of the chipboard because of the difficulty in adjusting the gap between the plates due to the uneven thickness of the carpet and, as a consequence, the insufficient quality of chipboard. The purpose of the invention is to improve the quality of the plates by heating the particleboard more uniformly. This goal is achieved by having the device connected in parallel to the worker and driven by an additional capacitor, sensors of the extreme positions of the plates of the additional capacitor and regulating WOOD PLATE, to the input of which a high-frequency generator is connected, while the controller outputs are connected to the drives for moving the plates of the working and additional capacitors The sensors of the extreme positions are connected to the drive of the plates of the working capacitor. One of the plates of the working capacitor is grounded, and the other is made in the form of at least two sections, each of which is connected to a separate output circuit of the high-frequency generator. In order to further regulate the heating of the carpet, each section of the working condenser is made of at least two parts hinged between each other. The hinges of the sections are located symmetrically relative to the transverse axis of the working capacitor. FIG. Figure 1 shows schematically a device for the continuous fabrication of chipboard; in fig. 2 - diagram of the device of high-frequency heating. The device consists of a carrier made in the form of a conveyor 1, a chip carpet 3 forming station 2, a pre-compactor 4 which is necessary for leveling the chipboard in height and for reducing it by about one third. Further, along the movement of the conveyor 1, a device 5 for high-frequency heating of chipboard carpet and charger b is installed, in which pre-pressing of particleboard carpet takes place.
    The pre-compactor 4, the high-frequency heating device 5 and the prepress b are covered with an infinite plastic tape 7 usually rotated by the output of the prepress 8, which is necessary to synchronize the movement of the tape 7 and chipboard 3. The tape 7 prevents the cracking of the outgoing pre-compact 4 chipboard carpet and eliminates the possibility of immersion of the electrodes of the device 5 of high-frequency heating in chipboard carpet with its uneven loading onto the fl conveyor.
    The splinter carpet, which comes out of the prepress b, is highly compacted and already possesses a relatively high strength, then gets into the press 9, at the exit from which the final product is obtained - the particle board.
    Predominantly operating at a frequency of 27.12 MHz, a high-frequency generator 10 feeds a two-section working capacitor consisting of two connected plates - the bottom 11 and the upper, consisting of two sections 12 and 13. Through this working capacitor, a pre-compacted particleboard carpet 3, which lies on the conveyor 1 and is predominantly coated with plastic tape 7, is passed through.
    In some cases, it may also be advantageous to have a system with one of the series-connected capacitors (plates and sections, respectively, 11, 12, or 11, 13) with the appropriate isolation of energy from the generator asymmetrically to the ground.
    In order to adjust the gap between the upper and lower plates, the actuator 14 is designed as a servomotor. Usually, sections of the upper plate are connected to it, in this case sections 12 and 13. Drive 14 is abutted with pe1; tector 15 is dependent on the constant anode current of the high-frequency generating lamp.
    In parallel with the working capacitor, an adjustable additional capacitor 16 is connected, the gap between the plates of which can be changed by means of a drive 17 also executed in the form of a servomotor
    a separate output of the regulator 15. Sensors 18 of the extreme positions of the plates of the additional encoder 16 are also provided. Changing the capacitance of the capacitor can be accomplished by tilting portions 19 and 20 of sections 12 and 13.
    The device works as follows.
    The splinter carpet 3 formed on the carrier 1 under the formation station 2 then passes through the preliminary compactor 4, where it is somewhat equalized in height and compacted. Next, the chip carpet enters the high-frequency heating device 5, where it is heated by high-frequency currents up to 50-70 °.
    In order to uniformly warm the carpet throughout its thickness, the system for stabilizing the intensity of heating involves changing the gap between the plates of the working capacitor by moving the upper sections 12 and 13 by the drive 14, however, building an automatic plate gating system that meets the high quality requirements is consistent with significant the difficulties. due to the fact that the plates of the working capacitor are rather heavy and cumbersome, i.e. have significant inertia, while the speed of movement of conveyor 1 is quite high. Thus, the system of automatic adjustment of the gap between the plates of the working capacitor should work out rather fast input actions, i.e. have high dynamic qualities, which unnecessarily increases its cost and, consequently, the cost of the final product. Building such a system is very difficult from a technical point of view. In practice, such regulation leads to insufficient heating of the carpet and, as a result, a decrease in the quality of the plates.
    The proposed device provides for a combined coarse and fine control of the power output of the high-frequency generator 10 depending on the constant anode current of the high-frequency generator lamp, and most importantly, the produced movement of the capacitor sections 12 and 13 of the upper plate of the capacitor in the dynamic sense should only minor requirements, since the high dynamic requirements imposed on the adjustment process are fulfilled with the help of One can readily movable plates additional capacitor 16.
    If in case of randomly occurring large irregularities of the chip carpet of the range of adjustment of the additional capacitor 16 is not enough, then through the sensor 18 of the extreme positions and the drive 14, the working capacitor sections 12 and 13 are rearranged, which does not lead directly to the additional capacity again falls into the normal operating range and thus the control loop, having high dynamic characteristics, including the controller 15 and the drive 17 for an additional capacitor 16 again can receive the full tone at .seb some regulation. The control loop (FIG. 2) makes it possible to automatically adjust the working electrodes, which, in combination with high-frequency power control with the help of an additional capacitor 16, gives an additional possibility, respectively, to automatically start the installation at the start of operation or after an interruption in operation. This can be done thanks to the fact that, for example, by using a software control circuit, after activating one single contact in the operating capacitor (plate and sections 11, 12 and 11, 13) a larger gap is established between the plates, and an additional the capacitor 16 is set to a lower capacity. After reaching these reference positions, the anode voltage of the generator can be automatically switched on, and the plates of the working capacitor can move in the direction of the smaller gap between them. If the anode current reaches an adjustable, predetermined value, then the movement of sections 12 and 13 ends with and. the drive of the additional capacitor 16 is turned on. The additional capacity is then forcibly set depending on the set value of the anode current and during operation it constantly provides the necessary control depending on the characteristics of the particleboard passed through the working capacitor. Both series-connected sections 12 and 13 of the upper plate have at least one part 19 and 20 that can be folded on a hinge from an electrically efficient plane. Thus, both constructively and in service, it is possible to adjust the working capacitor to the various bulk heights of the chipboard that are obtained when producing plates of different thickness, so that it is possible to work with all the thicknesses of plates with the smallest admissible air gap. In addition, in the case of continuous power supply, several generators of the same type can be used with working capacitors attached in series connected in series. Thus, the proposed system allows using relatively simple means to improve the uniformity of chipboard heating, and thereby improve the quality of the plates while maintaining high productivity. Formula of the Invention A device for the continuous manufacture of particle boards, including a chip carpet forming station, a chip carpet carrier in the form of a conveyor, a prepress, a high-frequency generator connected to its output and having a drive plate of a working capacitor between which the conveyor belts pass and a pressing mechanism characterized the fact that, in order to improve the quality of the plates by more uniform heating of chipboard carpet, the device is equipped with a working parallel and parallel additional capacitor sensors extreme positions and additional capacitor plates regulator, whose input is connected to the high frequency generator, wherein the outputs of the regulator are connected with the actuators of the working movement of the plates and the additional capacitor, wherein the end position sensors are connected to drive the working plates of the capacitor. 2. A device according to claim 1, characterized in that one of the plates of the working capacitor is grounded and the other is made in the form of at least two sections, each of which is connected to a separate output circuit of the high-frequency generator. 3. The device according to claim 2, characterized in that, in order to further regulate the heating of the carpet, each section of the operating capacitor is made of at least two parts hinged between each other. 4. The device according to the item 3, that is tal, in that the hinges of the parts of the sections are located symmetrically relative to the transverse axis of the working capacitor. Sources of information taken into account in the examination 1. Patent of Germany No. 2113763, class B 29 J 5/08, 1971 (prototype). SI. "In f I
    ,
    ff
    L:
    权利要求:
    Claims (4)
    [1]
    Claim
    A device for the continuous manufacture of chipboards, including a chipboard forming station, a chipboard carrier in the form of a conveyor, a prepressor, a high-frequency generator connected to its output and having a working capacitor plate drive, between which conveyor belts and a pressing mechanism, characterized in that, in order to improve the quality of the plates by more evenly heating the chipboard, the device is equipped with a parallel connection to the worker and an additional condenser with a drive sator, sensors of the extreme positions of the plates of the additional capacitor and a regulator at the input of which a high-frequency generator is connected, while the outputs of the controller are connected to the drives for moving the plates of the working and additional capacitors, and the sensors of the extreme positions are connected to the drive of the plates of the working capacitor.
    [2]
    2. The device according to claim 1, characterized in that one of the plates of the working capacitor is grounded, and the other is made in the form of at least two sections, each of which is connected to a separate output circuit of a high-frequency generator.
    [3]
    3. The device according to claim 2, wherein, in order to further control the heating of the carpet, each section of the working capacitor is made of at least. Of two parts pivotally attached to each other.
    [4]
    4. The device according to claim 3, characterized in that the hinges of the sections are arranged symmetrically with respect to the transverse axis of the working capacitor.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU878187A3|1981-10-30|Device for continuous production of wood particle boards
    US4216179A|1980-08-05|Process and an apparatus for the continuous manufacture of boards from material incorporating a heat hardenable binder
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    US4005162A|1977-01-25|Process for the continuous production of particle board
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    同族专利:
    公开号 | 公开日
    FI781556A|1978-11-18|
    JPS53143056A|1978-12-13|
    PL206868A1|1979-03-12|
    SE417489B|1981-03-23|
    US4221950A|1980-09-09|
    DE2722348B1|1978-11-02|
    SE7805559L|1978-11-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    US2551757A|1945-08-10|1951-05-08|Mittelmann Eugene|High-frequency heating|
    US2607880A|1945-09-21|1952-08-19|Lord Mfg Co|Electrostatic heating|
    US2616025A|1947-03-20|1952-10-28|Westinghouse Electric Corp|Batch dielectric heating|
    US2546004A|1947-07-11|1951-03-20|Westinghouse Electric Corp|Progressive dielectric heating|
    US2467782A|1947-09-20|1949-04-19|Westinghouse Electric Corp|Dielectric heating means with automatic compensation for capacitance variation|
    US2549399A|1947-10-10|1951-04-17|Atlantic Electronics Corp|Electrode for diathermy apparatus or the like|
    US2723517A|1949-07-15|1955-11-15|United Biscuit Company Of Amer|High frequency sealer|
    US2697254A|1950-03-14|1954-12-21|Bruce A Gordon|Dry process of manufacturing pressboard|
    US3022674A|1960-06-08|1962-02-27|Sylvania Electric Prod|Tuning device|
    US3177432A|1962-04-25|1965-04-06|Rca Corp|Multifunction axially movable knob control for channel selection, fine tuning and volume control|
    CH445683A|1965-04-13|1967-10-31|Hasler Ag|Arrangement for dielectric heating of workpieces in a high frequency field|
    DE2113763B2|1971-03-22|1976-04-15|Bison-Werke Bahre und Greten GmbH & Co KG, 3257 Springe|DEVICE FOR THE CONTINUOUS PRODUCTION OF CHIPBOARD|JPS6244057B2|1978-12-29|1987-09-18|Sadaaki Takagi|
    SE419617B|1979-12-12|1981-08-17|Kockums Ind Ab|CONTINUOUS WORKING CURE PRESSURE|
    DE3107589C2|1981-02-27|1986-01-30|Bison-Werke Bähre & Greten GmbH & Co KG, 3257 Springe|Device for the continuous production of chipboard, fiberboard or similar boards|
    DE3373606D1|1982-01-30|1987-10-15|Sicowa Verfahrenstech|Device for heating an extrusion moulding track of electrically conductive material, and the use thereof|
    US5278382A|1990-10-29|1994-01-11|Herfurth Gmbh|Method for the high-frequency heating of dielectric workpieces|
    US5223684A|1991-05-06|1993-06-29|Ford Motor Company|Method and apparatus for dielectrically heating an adhesive|
    US5254825A|1992-01-13|1993-10-19|Npbi Nederlands Produktielaboratorium Voor Bloedtransfusieapparatuur En Infusievloeistoffen B.V.|Apparatus for the sealing of medical plastic articles|
    DE4240272C2|1992-12-01|1994-11-24|Peter Dr Hoffmann|Device for heating a water-containing material|
    SE502481C2|1994-03-08|1995-10-30|Lars Ekemar|Process and apparatus for generating heat in preferably organic masses and materials|
    US5556567A|1994-05-09|1996-09-17|Henny Penny Corporation|System and process for controlling dielectric ovens|
    DK174057B1|1994-08-17|2002-05-13|Tulip Internat A S|Method and apparatus for heating media by high frequency electromagnetic waves|
    DE19604574A1|1996-02-08|1997-09-18|Juergen Dr Kramer|Process and apparatus for the continuous production of sheets of lignocellulosic particles|
    US6255635B1|1998-07-10|2001-07-03|Ameritherm, Inc.|System and method for providing RF power to a load|
    AU4159302A|2000-12-05|2002-06-18|Comdel Inc|Rf energy conveyor oven|
    EP1372942A1|2001-03-21|2004-01-02|C.G. Di Cattelan Gianni & C. SNC|Continuous press, particularly for manufacturing products with joined parts as well as synthetic adhesive|
    NL2003853C2|2009-11-23|2011-05-24|Sonder Food Systems B V|DEVICE FOR PASTEURIZING A MASS OF FOODSTUFF.|
    JP5388916B2|2010-03-17|2014-01-15|日本碍子株式会社|Method for drying honeycomb formed body|
    DE102011003318B4|2010-10-07|2016-06-23|Institut Für Holztechnologie Dresden Gemeinnützige Gmbh|Fibreboard with functional density profile and process for its production|
    EP2487016A1|2011-02-14|2012-08-15|Dascanova GmbH|Method and apparatus for the production of a particle based element|
    CN102501281A|2011-10-13|2012-06-20|青岛国森机械有限公司|Hydraulic press for multi-layer bamboo wood integrated material|
    US10763814B2|2016-08-09|2020-09-01|John Bean Technologies Corporation|Radio frequency processing apparatus and method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19772722348|DE2722348B1|1977-05-17|1977-05-17|Method and device for heating a fleece|
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