• 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:
    The invention relates to a method for heating a support plate on a double-web press and to a device for carrying it out. The purpose of the invention is to improve the quality of the compressible material in the presence of deviations of the actual temperature from the set, installed locally on the support plate (p). The method of heating P 13, transferring pressure on the belts between which the pressed mass is placed, with the help of a heated coolant flowing in P 13, is that the direction of flow of the coolant periodically reverses at certain intervals of time. The lengths of time for reversing the direction of flow of the coolant are controlled to the extent of the deviations of the actual temperature from the setpoint to the purchase of P 13 at the local measurement sites of the set temperature. The device for carrying out the method contains heating coolant, connected to supply 36 heated P 13. A reversing valve 38 is provided, by means of which both sides of P 13 are alternately connected to the inlet and outlet pipes 36 and 37 are heated ceiling elements means. 2 sec. and zp f-ly, 4 ill. § (Y)
    公开号:SU1433401A3
    申请号:SU853986902
    申请日:1985-12-13
    公开日:1988-10-23
    发明作者:Хельд Курт
    申请人:Курт Хельд (ПЕ)；
    IPC主号:
    专利说明:


    cm
    The invention relates to a method for heat exchanging parts on a two-belt press and a device for its implementation,
    The purpose of the invention is to improve the quality of the pressed material in the presence of deviations of the actual temperature from the target set locally on the support plate: Figure 1 shows a schematic of a two-belt press, side view; ya fig. 2 shows a section A-A in FIG. in fig. 3 is a schematic diagram for reversing a flowing flow media; in fig. 4 - temperature ph characteristic in a heated defile.
    ; In the frame (FIG.) Of the two-belt press I in bearing bridges 2 and 3, four reversible drums 4 - 7 are mounted for rotation, rta of both upper drums 4 and 6, and. Also, on both lower drums 5 and V there is one clamping tape
    8 and 9, was bound with a tensile Steel Tape. Accordingly, one upper and one lower reel is driven by actuators (not shown). The direction of rotation is shown by the arrows on the drums 4 and 5. Between the two pressure tapes 8 and
    9, a so-called reaction zone 10 is located inside a two-liter press, in which a strip extends (Fig. 1, right to left)
    eleven
    eg.
    state of the material from artificial resin-impregnated layered materials, fibrous mixtures in the molds, etc. using heat and pressure.
    The reversible drums 4 and 5 installed on the inlet side of the machine have in the cylindrical wall channels 12 with parallel axes through which heated heat carrier circulates, for example thermal oil, which is fed and removed in a known manner. Due to the heat exchange with this heat carrier previously heated to a certain temperature, the side surface of the corresponding circulating drum is heated. Due to the heat conduction, heat is transferred from the drum to the pressure tapes .8 and 9, which give it away, for example, in order to cure the resin onto the strip of mother 11.
    five
    five
    thirty
    35
    0
    five
    40
    45 ate
    55
    Acting on the strip of material 11 in the reaction zone 10, the pressure is hydraulically or mechanically applied from the supporting plates 13 and 14 to the inside of the side of the pressure tapes 8 and 9. The resulting reaction forces of the support are transferred by the plates 13 and J4 to the frame of the press 1, C For this purpose, plates 13 and 14 are fixed next to each other with an I-beam 15 several supports 16 and 17, which are mounted across the entire width of the press 1. Plates 18 and 19 are welded on the front and rear end faces of the supports 16 and 17 its side bolted bearing axles 2 and 3.
    The supporting bridges 2 and 3 contain hydraulic cylinders 20 and 21, with which you can pull the belts 8 and 9. A pair of upper supporting bridges 2 rests through the spindle 22 on the rail. the lower pair of support bridges 3. The spindle screws 22 serve to adjust the height of the reaction zone 10 between lentimi 8 and 9. The lower support bridge 3 is mounted cantilever on the reverse side of the press 1 between the shelves 23 of two U-shaped racks 24 (FIG. 2) for their part, mounted on a stationary heavy base plate 25, From the right side of the upper support bridge located in Fig. 2, a cantilever 26 protrudes, fastened with a tie 27 to a stand 24, therefore a stable, self-supporting structure is created, allowing replacement of the presser the front side of the press belts 1.
    In order to avoid the difference in temperature and different values of local thermal expansion in order to maintain the desired dimensions of the extruded strip of material 11, in the press frame, besides the drums 4-7, other parts of the press 1 are also heated, such details include In particular, support plates 13 and 14, in which longitudinal apertures 28 are threaded, through which heated heat carrier can flow. Supply and discharge of heat transfer fluid is carried out through transversely located collectors 29 and 30, made on opposite sides of pl Astin 13 and 14.
    Racks in I-beams x of supports 16 and 17 are also provided with drillings 31, through which coolant flows for the purpose of heating (figure 2).
    On the flanges of the supports 16 and 17, which are located in the side opposite to the reaction zone, heated compensatory pressure gauges 32 and 33 are welded in. The latter also have drilled 34 along which coolant can flow.
    The coolant circulates in the heated parts of the machine in a constant circuit, and it heats itself in a heating device, such as an oil burner, flows through pipelines or heating channels of the parts, and the cooled one returns back to the heating device. During this cycle, circulating, for example, in channels 12 of drums 4 and -5 or in drilling 34 of compensating flanges 32 and 33, the heat-carrier constantly gives off heat to the corresponding parts of the machines, as a result of which it itself constantly collapses. Since the amount of heat given away is proportional to the temperature difference between the heated part and the coolant, those parts of the heated parts through which the coolant flows in the cycle at later periods of time cannot be heated to the same temperature as those through which the coolant flows in earlier periods of time. As a result, there is an undesirable local temperature difference in the press frame, which leads to the breakdown of press parts and ultimately to a violation of specified dimensions reusable material.
    In order to avoid such local temperature changes with their negative consequences in a winding press, the principle of reversing the direction of the flow of the heat transfer medium (FIG. 3) is proposed. This principle is valid for all other {x heated parts of a double-lamination press 1.
    The plate 13 (FIG. 3) in its middle is divided by a dashed line into two symmetrical parts A and B. In part A, there is a collector 29 at the left edge, and a collector 30 at part B at the right edge. From collectors 29 and 30 (FIG. ) waste t made in the form
    longitudinal holes 28 channels connecting the collectors 29 and 30 among themselves.
    Dp heating plate 13 collectors 29 and 30 are connected to the coolant circuit. The latter is heated in a burner 35, which contains a feed 36 and a discharge 37 pipelines. The pipes 36 and 37 are connected to a standard non-return valve 38 with remote control via a schematically depicted electromagnet 39. In position (FIG. 3) of the reversing valve 38, the feed pipe 36 of the burner 35 is connected to the collector 29, and the discharge pipe 37 is connected to the collector 30. Thus the collector 29 is switched on to supply and collector 30 to discharge the heat carrier in plate 13. The heated coolant flows through the collector 29 and the opening 28 first to part A of plate 13 and then to part B to collector 30, from which through the discharge pipes wire 37 it is returned to the burner 35 .. This heat transfer fluid flow direction shown by black arrow 40 (fig.Z). Since the coolant itself cools during the flow through the plate 13 and the amount of heat given away is proportional to the temperature difference between the plate and the coolant, part A of the plate 13 has a higher temperature than part B. This temperature characteristic schematically depicts the position in FIG. (FIG. 3) of the reversing valve 38. On the left edge of part A, the temperature T2 is set accordingly, and on the right edge of part B, the temperature T1, with T2 greater than T1.
    If at the next stage of operation the flow direction is reversed by shifting the reversing valve 38 to the left (Fig. 3), the heat carrier heated in the burner 35 is supplied from the supply pipe 36 to the collector 30. The heat carrier flows through the plate 13, then the collector 29 and the valve 38 to the outlet The burner pipeline 37 is 37. At this stage, the carrier flows through the supporting plate 13 in the direction shown by the white arrows 41, the npoTHBoni- negative direction in the case of the reverse
    Thus, the coolant flows first through part B and then through part A of the support plate 13. In this direction, a temperature difference is created from part B to part A (FIG. 4). At the second stage of the operation of the right, the edge of part B hardens a higher temperature T2, and on the left edge of part A - a lower temperature | T1.
     Since in the first stage of operation, the temperature difference from part A to part B, and in the second stage of part B to part A, and both stages in c) follow each other, the olSe values of temperature difference are equalized and the average temperature T is set. (FIG. 4, shtrnhpunktirna line) on both parts A and B, After the second stage, the first stage follows again, etc.
    If the stages are changed periodically at appropriately formed intervals of time, then a constant Tb1 temperature T across the entire base plate is established after a certain setting BiieMeHH; 13, so that it does not have a local temperature difference and, because of this, it does not undergo a change in its geometric shape due to different Hbix values of thermal expansion.
    In the first embodiment, the time intervals from the beginning of the 0) -P; Nogo stage to the beginning of the next stage are equal. Consequently, the work is carried out with a constant period. In another preferred embodiment, the reversal of the flow direction
    ka
    heat carrier can be controlled
    the control circuit forming the regulating circuit in such a way that a constant temperature is created for the heated parts, and the actual temperature value is taken at different points of this component, and depending on the difference between the desired and actual temperature, the regulating circuit changes time intervals up to until the set temperature is reached again.
    The regulating circuit 42 actuates through the electromagnet 39 a reversible valve 38, as well as via pipelines 43 and 44, connected to temperature-measuring probes 45 and 46, installed on its part per hour5
    0

    five
    0
    five
    0
    five
    0
    Ty B and, respectively, in part A of the plate 13.
    Using the support plate 13 as an example, the direction of heat carrier reversal and the HeNry-related device can be transferred to the remaining heated parts of the two-belt press, in particular, reversible drums 4 and 5, supports 16 and 17, and expansion flanges 32 and 33. Thanks to the constant achieved the temperature of the parts is eliminated by changes in the geometrical shape of the press frame caused by temperature differences, and on the output side of the two-belt press, a uniformly processed strip is obtained that retains the specified dimensions one.
    The advantage of the invention lies in the fact that it is carried out without significant additional technological costs and can be applied, in particular, on known two-belt presses.
    权利要求:
    Claims (3)
    [1]
    Formula inveni.ni
    1, a method of heating a support plate of a double-belt press, which transfers pressure to the belts between which the material is pressed, using heated heat transfer fluid flowing through the support plate, in which the direction of flow of the heat transfer medium is periodically reversed at certain time intervals, that, in order to improve the quality of the compressible material in the presence of deviations of the actual temperature from the set, locally installed on the support plate, the length of time for reversing the direction Depending on the magnitude of deviations of the actual temperature from the set temperature, the heat carrier is adjusted until the support plate in the local places of temperature measurement acquires the set temperature.
    [2]
    2, A device for heating a support plate of a double-belt press-containing means for heating the heat-gg carrier, connected through supply and drain pipes for the heat transfer medium to the first and second sides of the support plate, and a reversing valve for alternately connecting both sides-supporting plates with inlet and discharge pipelines, means for heating, characterized in that, in order to improve the quality of the pressed material in the presence of deviations of the actual temperature from the set, set locally It is equipped with a reversing valve automatic control system connected to thermometers placed on the support plate for measuring actual temperature values and regulating time periods for reversing the T1 direction of coolant flow depending on the deviations of the actual temperature from the specified values.
    [3]
    3. The device according to claim 2, characterized in that it is provided with transverse channels extending along the edges of each support plate and forming collectors with collecting channels and longitudinal drills connected thereto for the heat carrier as well as the circulation loop of the heat carrier; The channels are connected through supply and drain pipelines to the coolant circuit, which is controlled by an automatic control system using a reversing valve.
    1
    f
    fe
    GB
    21 21
    Stage I
    Stage1
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE512002C|1930-11-06|Siempelkamp Gmbh & Co|Heating device for press plates|
    US1951999A|1929-07-23|1934-03-20|Sprague Specialties Co|Press|
    DE854747C|1950-09-23|1952-11-06|Motala Verkst Ab|Arrangement for the production of fibreboard or other floor presses|
    US3390719A|1966-03-07|1968-07-02|Foster Wheeler Corp|Heat exchanger valve system|
    US3461953A|1967-08-15|1969-08-19|Hull Corp|Vacuum dryer shelf temperature control|
    US3568595A|1967-08-28|1971-03-09|Mccall Corp|Apparatus for making letterpress plates|
    US3583467A|1969-05-14|1971-06-08|Dow Chemical Co|Method for controlling die temperature and for pacing the casting cycle in a metal die casting operation|
    DE2421296A1|1974-05-02|1975-11-13|Held Kg Adolf|METHOD AND DEVICE FOR MANUFACTURING CONTINUOUS LAMINATES|
    DE2542547C2|1975-09-24|1982-11-11|Universa Heizungssysteme GmbH + Co KG, 4500 Osnabrück|Control process for underfloor heating as well as control device for carrying out the process|
    DE2757887C2|1977-12-24|1979-08-09|Lobscheid, Wolfgang, Dr., 4000 Duesseldorf|Reversing circuit for radiant heating|
    JPS5514500U|1978-07-18|1980-01-29|
    DE3011217A1|1980-03-22|1981-10-01|Theodor Hymmen Kg, 4800 Bielefeld|DEVICE FOR JOINING SEVERAL MATERIAL LAYERS|
    DE3135206C1|1981-09-05|1982-10-28|Adolf Illig Maschinenbau Gmbh & Co, 7100 Heilbronn|Process for regulating the temperature of the upper and lower part of tools for the production of containers from thermoplastic plastic film and tools for carrying out the process|
    DE3421631C1|1984-06-09|1985-09-12|Küsters, Eduard, 4150 Krefeld|Method for controlling the heating or cooling medium flow in a heatable or coolable roller and corresponding roller arrangement|DE3743933C2|1987-12-23|1996-08-22|Dieffenbacher Gmbh Maschf|Method and device for heating a continuously operating hot plate press|
    DE3834993A1|1988-10-14|1990-04-19|Held Kurt|METHOD AND DEVICE FOR THE CONTINUOUS PRODUCTION OF LAMINATES|
    US5149394A|1988-10-14|1992-09-22|Kurt Held|Method and apparatus for continuously fabricating laminates|
    GB2230594B|1989-04-21|1993-09-01|Rolls Royce Plc|Heat exchanger|
    US5213819A|1990-03-30|1993-05-25|Maschinenfabrik, J. Dieffenbacher Gmbh & Co.|Continuously operating press|
    EP0546402B1|1991-12-12|1996-04-17|Bison-Werke Bähre & Greten GmbH & Co. KG|Method and apparatus for continuous production of surface refined boards and chip board so obtained|
    DE4415415C2|1994-05-02|1996-12-19|Brandwijk Systems Programming|Continuous belt press|
    DE4418064C1|1994-05-24|1995-09-07|Illig Maschinenbau Adolf|Preventing damage to combined form-moulding and stamping machines for|
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    DE10114381A1|2001-03-23|2002-10-10|Metso Paper Inc|Process for the continuous production of chipboard and similar sheet-like board materials and suitable double belt press|
    JP4443093B2|2001-11-06|2010-03-31|北川精機株式会社|Press device and control method of press device|
    US8100172B2|2006-05-26|2012-01-24|Tai-Her Yang|Installation adapted with temperature equalization system|
    JP5428703B2|2009-09-24|2014-02-26|富士ゼロックス株式会社|Laminating apparatus and image recording body manufacturing apparatus|
    CH706146A2|2012-02-29|2013-08-30|Oblamatik Ag|Method and system for tempering components.|
    US9986664B1|2014-12-01|2018-05-29|Amazon Technologies, Inc.|Variable time delay on datacenter pod direct cooling|
    CN112792947A|2021-02-03|2021-05-14|张旺|Artificial particle board pressing molding method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3445634A|DE3445634C2|1984-12-14|1984-12-14|Method and device for heating the heatable machine parts of a double belt press|
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