• 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:
    A control system for a continuously operating press, for the manufacture of chipboard, molded laminated plastic and the like, having two endless revolving forming belts which advance opposite each other in a pressing section, between which a starting material is compressed in the pressing section and each of which belts is provided with a separate drive, one of the drives being a lead drive equipped with a speed control for holding the belt velocity constant, in which there is provided a torque controller for comparing the torque of the lead drive with the torque of the other drive and providing an output which regulates the torque of the other drive such that the torques of the two drives always retain an adjustable ratio between each other over the entire torque range; and a further speed control for the belt drive which is not operating as the lead drive which is set higher than the speed control of the lead drive and which is adapted to be adjusted along with the speed control of the lead drive, with the speed ratio remaining the same.
    公开号:SU923356A3
    申请号:SU782618502
    申请日:1978-05-30
    公开日:1982-04-23
    发明作者:Кюстерс Эдуард；Арвайлер Карл-Хайнц
    申请人:За витель；
    IPC主号:
    专利说明:

    (54) CONTROL SYSTEM FOR UPPER AND LOWER DRIVES PRESS CONTINUOUS ACTION FOR PRODUCTION
    one
    The invention relates to equipment for the production of chipboard in a continuous manner and can be used to build automatic control systems for continuous press machines.
    A known system for controlling the upper and lower drives of a continuous press for producing chipboard, including drives speed sensors, drive speed regulators, to which speed turns inputs are connected to the drive speed output controllers, controllable drive power units and the bottom drive current sensor GP
    However, for a known control system, the synchronization of the movement of the press drives is not sufficiently high, which leads to a deterioration in the quality of the product — particle board, as well as design complexity. WOOD PLATES
    The purpose of the invention is to improve the synchronization of movement of press drives and simplify the design.
    This goal is achieved by the fact that 6 the system is equipped with a correction unit connected in series between the output of the speed adjuster and the input of the upper drive controller, the speed controller of the all 10 drive has an additional input for setting the current supply limit, to which the lower drive power sensor is connected, the outputs topo8 are connected to the IS inputs of the drive power supply units, and the transfer coefficient of the correction unit is in the range from 1.01 to 1.1
    In addition, the supply currents of the drive motors differ from each other by no more than tlO.
    FIG. Figure 1 shows a continuous press for the production of chipboard, side view; FIG. 2 is a functional diagram of a press-drive control system; FIG. Figure 3 shows the operation of the press drive control system. A continuous press for the production of particle boards contains forming tapes 1 and 2, which in the pressing zone 3 act on impregnated with glue, such as rosin, chipboard to obtain the finished product (particle board) k. The upper belt 1 of the press is mounted on the lead 5 and the slave 6 drums, and the lower belt 2 is respectively on the drums 7 and 8. In the press zone 3 inside the forming tape 1 an upper support structure 9 is provided, which interacts with the lower support structure 10 provided inside the lower forming belt 2 The supporting structures 9 and 10 support the sections of the forming belts 1 and 2 and squeeze the chipboard between them with great force. Each of the supporting structures 9 and 10 consists of separate supports 11 and 12, located opposite each other. Each two supports 11 and 12 constituting a pair are connected by a DRU with another spindle 13 located on the side, outside the chipboard, and form separate closing force push-links. Between the supports 11 and the belt 1 there is a pressure plate 1, and between the belt 2 and the supports 1 2 there is a pressure plate 15 which is supported by hydraulic elements located on each support 12 each other, the force of which can be controlled and which provide the required pressure distribution chipboard carpet The pressure plates transfer force from the supports 11 and 12 to the belts 1 and 2 and contain channels in which the heating elements are located. The forming belts 1 and 2 move in the pressing zone 3 in the direction indicated by the arrow 16 between the forming belts 1, 2 and facing each other of the pressing plates And 15 there are roller chains 17 along which the forming belts 1 and 2 roll relative to pressure plates k and 15 .. Reverse branches of roller chains 17 pass through channels of pressure plates and 15- The rollers of chains 17 thus transfer both pressure and heat of pressure plates 1 + and 15 to the forming tapes 1 and 2 and, therefore, on the chip carpet. The device also contains a drive 18 (electric motor) of the drum 6 for the upper forming tape 1 and a drive of the drum 19 made in the form of an electric motor 8 for the lower forming tape 2. The drives 18 and 19 can also affect the drums 5 and 7, which does not interfere with the fact that the drive 18 drives the upper forming belt 1, and the drive 19 - the lower forming belt 2. The ratio of the torques between the drives 18 and 19 is controlled by means of a current by the speed controller 20 of the upper drive. The ratio between the currents entering the actuators 18 and 19 can be changed by + 10%. In the present exemplary embodiment, the tuning is chosen so that the current entering the lower actuator 19 is always slightly larger than that in the actuator 18, since the lower shaping belt 2 is longer, passes additional positions and therefore has a slightly larger drag. The lower actuator 19 is the leading actuator. For this, it is equipped with a speed regulator 21, which is controlled by an actuator 22 for the number of revolutions of the drives. The nominal speed set by the setting device 22, besides the speed controller 2t, is also fed through the correction unit 23 to the speed controller 20 of the upper drive 18, the correction unit 23 outputs a signal to the speed of the upper drive 18 constantly exceeding a certain value. The rotational speed OQ lies within 1-10% above the revolutions of the speed for which the regulator 21 is set to the speed 21 of the lower drive 19. The revolutions (rotational speed) of the drives 18 and 19 are measured by sensors 2 and 25, for example, in the form of tachogenerators, the outputs of which are connected to the feedback inputs of the regulators 20 and 21. The maximum permissible supply current of the actuator 19 is set by potentiometer 2b connected to the corresponding input of the regulator 21. The load current of the lower actuator 19 is measured by the sensor 27 of the lower supply current drive, Making a as a current transformer, the voltage supply is fed to the actuators 18 and 19 are controlled by the thyristor in this case the blocks 28 i.29 power, to the control inputs of which outputs Con cheny regulators 20 and 21. The apparatus operates as follows. Regulator 20 transmits current only to certain limits, which, 8 turn, are determined by the drive power (current) of the drive-19, i.e. increases with increasing power consumed by drive 19. In idle mode 3, regulator 20 passes some idle current 1 (7, which is enough for the press to work without the material to be pressed.) When starting the press, the starting current rises along the curve section 30 (fig. 3), reaching the limit 10 and remains at the same level in accordance with the horizontal section 31 of the curve, even if the number of revolutions increases. But in the load mode, when the actuator 19 consumes a higher current, this current moves the transmission limit of the regulator 20 to the value I. The current can also increase curve 32, corresponding then curve 33 at level I. The value of I is chosen so that, in accordance with the presented example of execution, it is slightly less than the current consumed by the actuator 19, and the torque of the upper actuator 18, set at the feed, would also be slightly less because the upper forming belt 1 requires a smaller torque. With an even higher current consumption by Drive 19, the transmission limit of the regulator 20 is shifted to I ij (its characteristic is shown in FIG. 3 by the dotted line). If the press is turned on in the idle mode, the regulator 21 of the number of revolutions of the lower drive 19 first goes to the set speed of the section p. Block 23 of the correction of the number of revolutions of the upper drive 18 is set at a slightly higher number of revolutions F, thus power requirements in idle mode, the current consumed by the upper actuator 18 is below level I and therefore is passed in each case by the regulator 20. When the sawdust mass is introduced into the press, the regulator 21 is the number of revolutions of the lower drive. 19 tends to maintain the speed at the level n, and for this purpose delivers to the drive 19 a greater current and, consequently, greater power. The correction unit 23 tends to maintain the pre-set increased number of revolutions OQ and increase the current supplied to the drive 18. Since the forming tapes 1 and 2 in the press section can only move at the same speed, increasing the power on the drive 18 would cause it to additionally would lower the lower forming belt 2. As a result, its actual value on the controller 21 would exceed the nominal value, therefore the controller 21 would limit the power supplied to the actuator 19 and the output of the power consumed by the drives This would be done almost exclusively with the help of the top drive 18. To prevent this, the controller 20 has the characteristic shown in FIG. 3. It passes current only up to a certain value, which depends on the current or power consumption of the drive 19. The signal of the correction unit 23 does not act in these conditions. The actuator 18 receives not an increased current, but only a value derived after the regulator 20 sets the current of the actuator 19. Therefore, in the case of an increased load, the correction unit 23 tuned to an increased number of front speeds is deactivated and the drive 18 is controlled from the regulator 20. The current limit I at the output of the controller 20 to a predetermined value prevents the uncontrolled distribution of power in the drives 18 and 19- Taking into account the different running resistance of the forming belts 1 and 2, the distribution can be done Producing so that the forming belts 1 and 2 in the pressing zone 3 move at the same speed and do not tolerate any shearing forces, and the particleboard would not experience any shearing forces in the forming density.
    tape, thereby improving the quality of chipboard.
    权利要求:
    Claims (2)
    [1]
    Invention Formula
    t, the control system of the upper and lower drives of the continuous press for the production of chipboard, including the drive speed sensors, the drive speed controls, to the input inputs of which the drive speed control output is connected, the drive power control units and the bottom drive current sensor , characterized in that, in order to improve the synchronization of the movement of the press drives and simplify the design, the system is equipped with a correction unit, which is connected indirectly between the output of the task torsion speed switch and the top drive controller input, the top drive speed controller has an additional input for setting the power supply current to which the bottom drive current sensor is connected, the controller outputs are connected to the control inputs of the blocks
    power supply of the drives, and the transmission coefficient of the correction unit is in the range from 1.01 to 1.1.
    [2]
    2. Pop-up system 1, distinguished by the fact that the supply currents of the drives differ from each other by no more than ± 10%.
    Sources of information taken into account during the examination 1. Germany laid out the application
    GG25 0130, cl. In 29 J 5/0, published 03.17,77.
    "about
    l
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    同族专利:
    公开号 | 公开日
    NL181562C|1987-09-16|
    JPS5548989B2|1980-12-09|
    FI781488A|1978-12-08|
    NL7805401A|1978-12-11|
    AT357333B|1980-07-10|
    BR7803632A|1979-01-09|
    SE7805253L|1978-12-08|
    FR2393670B1|1983-08-19|
    BE867914A|1978-10-02|
    JPS543976A|1979-01-12|
    NO781976L|1978-12-08|
    PL110842B1|1980-08-30|
    IT1097062B|1985-08-26|
    DK151943B|1988-01-18|
    IN149038B|1981-08-22|
    AU3676178A|1979-12-06|
    DE2725640B2|1979-04-05|
    HU175775B|1980-10-28|
    NO146662B|1982-08-09|
    DK151943C|1988-07-18|
    SE434484B|1984-07-30|
    DD138167A5|1979-10-17|
    FR2393670A1|1979-01-05|
    AR222467A1|1981-05-29|
    NL181562B|1987-04-16|
    CS207611B2|1981-08-31|
    YU40708B|1986-04-30|
    GB1601290A|1981-10-28|
    CA1113584A|1981-12-01|
    US4371414A|1983-02-01|
    MX143884A|1981-07-29|
    NO146662C|1982-11-17|
    IT7824159D0|1978-06-02|
    PL207383A1|1979-02-26|
    YU135678A|1982-06-30|
    AU516360B2|1981-05-28|
    DK202278A|1978-12-08|
    DE2725640A1|1978-12-14|
    ES470184A1|1979-02-01|
    CH630002A5|1982-05-28|
    ATA361878A|1979-11-15|
    引用文献:
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    RU2713520C1|2016-10-06|2020-02-05|Суисс Кроно Тек Аг|Panel for pressing material from wood-based material and method for controlling a device for pressing a panel of wood material|US2167356A|1938-08-01|1939-07-25|Gaylord Container Corp|Tape smoothing machine|
    US2326889A|1942-07-15|1943-08-17|Kurt W Schulz|Apparatus for making insulating material|
    DE1009797B|1953-01-09|1957-06-06|Heinrich Schaefer Dipl Ing|Pressing device for the continuous production of chipboard|
    US3378430A|1964-12-11|1968-04-16|Aizawa Tadashi|Laterally connecting apparatus for veneer|
    FR1469225A|1965-12-27|1967-02-10|Continuous press|
    US3521552A|1968-07-29|1970-07-21|Hans John Knapp|Endless caul belt continuous press|
    DE1939784C3|1969-08-05|1978-08-24|Maschinenfabrik J. Dieffenbacher Gmbh & Co, 7519 Eppingen|Continuously operating press for the production of chipboard, fiberboard, plywood or the like|
    DE1953816A1|1969-10-25|1971-07-01|Hwm Weh Maschf Hermann|Process and device for the production of single and multi-layer chipboard and for their coating|
    US3993426A|1971-11-22|1976-11-23|Eduard Kusters|Continuous press having improved anti-friction rollers|
    BE791762A|1971-11-22|1973-03-16|Kuesters Eduard|DEVICE INTENDED TO EXERCISE PRESSURE ON THE SURFACE|
    JPS4958177A|1972-06-29|1974-06-05|
    DE2231802B2|1972-06-29|1976-12-02|G. Siempelkamp & Co, 4150Krefeld|Chip/fibreboard prodn machine - with separate devices for pressing belts and transporting belts|
    US3977929A|1973-06-13|1976-08-31|Molins Machine Company, Inc.|Corrugator|
    DE2404523B2|1974-01-31|1979-06-13|Maschinenfabrik J. Dieffenbacher Gmbh & Co, 7519 Eppingen|Continuously working press|
    US4178144A|1977-09-22|1979-12-11|Kornylak Corporation|Molding conveyor drive|
    US4266924A|1979-08-09|1981-05-12|Fram Jerry R|Transmission drive with cyclic speed variations and uses thereof in compaction systems using dual wire-mesh belts|JPS6317126B2|1981-11-16|1988-04-12|Teijin Ltd|
    DE3210551C2|1982-03-23|1984-11-08|Fa. Leonhard Kurz, 8510 Fürth|Method and device for applying a stamping foil impression on a flexible material web|
    DE3570620D1|1985-07-17|1989-07-06|Herbert Prignitz|Double endless belt-shaping apparatus|
    US4938126A|1988-05-09|1990-07-03|Rubio Manuel J|Tortilla press apparatus|
    US20040191378A1|2003-03-25|2004-09-30|Golby Adrian Barry|System and method for processing tortillas|
    US20050287240A1|2004-06-01|2005-12-29|Scott Mattias|Moving head dough press|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE2725640A|DE2725640B2|1977-06-07|1977-06-07|Control system for a continuously operating press|
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