• 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 can be used in the chemical industry. The aim of the invention is to improve the quality of products due to the effective correction of the dynamic pressure and maintaining a constant value. For this, the device contains a plasticizing device, an injection unit with a rod, a material piston and forward and reverse pumping chambers, a rod position sensor proportional to the controlled pressure valve, a control signal generation unit (BVSU) connected to the rod position sensor and fitted with a setting device dynamic head and adder adding the current value of the dynamic head with a given value. During operation, with the axial movement of the rod and material piston, the signal from the position sensor enters the BALU and composes with a predetermined dynamic pressure, and the control signal through the proportional controlled pressure valve enters the forward pumping pressure chamber, while the back pressure pumping chamber is connected with pressure regulating valve. This leads to a correction of the dynamic pressure and the rubber material is kneaded under a certain constant dynamic pressure, which ensures the maintenance of a constant temperature during plasticization, which is one of the basic requirements for improving the quality of rubber processing. 2 Il. CO N3 x mi. r ss
    公开号:SU1297715A3
    申请号:SU843748946
    申请日:1984-06-06
    公开日:1987-03-15
    发明作者:Вон Дер Охе Хелмке；Коливер Вольфганг
    申请人:Клекнер-Верке Аг (Фирма)；
    IPC主号:
    专利说明:

    112
    The invention relates to rubber processing machines, and
    It is specifically for the hydraulic control of rubber extruders, and can be used in chemical industry.
    The purpose of the invention is to improve the quality of products by effectively correcting the dynamic pressure and maintaining a constant value.
    Fig. 1 shows a pressure casting installation with an extruder and an injection unit; Fig. 2 is the same, with the valve on position for determining the correction value for the dynamic head to the beginning of the dynamic head phase.
    The extruder consists of a plasticiser and an injection unit 2. The plasticizing device 1 has a screw 4 arranged rotatably in the cylinder 3, to which rubber material intended for plasticization is supplied through a funnel 5. The screw 4 is driven by a hydraulic motor 6, which is driven by a controlled hydraulic pump 7. The latter is controlled depending on the specific pressure, the make-up pressure.
    The injection unit 2 has a material cylinder 8 with an axially displaced material piston 9 connected to a rod 10 accommodated in a working cylinder 1, whose working piston 12 with a working cylinder 11 limits the forward and reverse strokes 13. The material cylinder 8 is connected to an extruder via a pipe 15, in which the check valve 16 is located. Material cylinder 8 has a stop valve 17.
    The hydraulic control device includes means for controlling the working cylinder 11, depending on the specific pressure and / or injection rate, the make-up pressure and the dynamic head in the form of valves. From the controlled hydraulic pump 7 connected to the tank 18, the pipeline 19 through the proportional valve 20 passes to the inlet pipe 21 of the four-way three-position valve 22. The first outflow pipe 23 through the pipe 24 leads to the hydraulic motor 6. In the pipe 19 to
    The branch 25 between the proportional valve 20 and the four-way, three-way valve 22 is connected to a pressure supply pipe 26.
    Between the proportional valve 20 and the branch 25 in the pipe 19 provides another branch
    A control line 28 is connected to the tank 18 through the pressure limiting valve 29. Between the branch 27 and the pressure limiting valve 29 a control pipe 31 passes from the branch 30 to the controlled hydraulic pump 7. A branch 30 is provided between the pressure limb 30 and the pressure limiting valve 29 32, which through pipe 33 is connected to the first inlet pipe 34 of a four-way three-way valve 35. The first pipe 36 of the outflow of a four-way three-way valve 35 is connected to the inlet pipe ohm proportionally controlled pressure valve
    37, the outflow pipe of which is connected to a branch 38 in the pipeline
    28 between the pressure limiting valve 29 and the tank 18. In the pipeline, the bridge is proportional to the controlled pressure valve 37 and the branch 38 is provided with a branch 39, which is connected to the second nozzle
    40 of the four-way three-way valve 35, the second inlet pipe 41 of the latter through the pipe 42 and the throttle 43 leads to the third pipe 44 of the outflow of the four-way three-way valve 22. Between the pipe 44 and the throttle 43 there is a branch 45, which through the pipe 46 leads to the pressure limiting valve 47 controlled by pipe 48 which is connected to a branch 49 between the throttle 43 and the inlet pipe
    41 in line 42. Pipeline 50 to retract valve 47 to limit the appearance of tank 18.
    The second outlet 51 of the outflow of the four-way three-way valve 22 is connected through pipe 52 to the pumping chamber 14 of the working cylinder 1 1.
    The pumping chamber 13 of the working cylinder 11 for returning the material piston 9 through the pipe 53 is connected to the second nozzle 54 of the four-way two-way valve outflow
    312
    a pipe 55, the first outlet 56 of whose outflow is in a locked state, and the third outlet 57 of the outflow is connected to a branch 58 in the pipe 50 of the outlet of the pressure limiting valve 47.
    The inlet pipe 59 of the four-way two-way valve 55 is connected via a pressure control valve 60 to a branch 61 in the pressure supply pipe 26,
    The material piston 9 or, respectively, the rod 10 of the working piston 12 is connected to the sensor 62 of the position of the rod 10 or the material piston 9, which, for example, can be an absolute stepping angle sensor connected via a gear rack to the material piston 9 or, respectively, the rod 10 working piston 12.
    In block 63, the generation of the control signal, in proportion to the controlled pressure valve 37, accumulates pressure according to a curve, in accordance with which the preliminary pressure changes according to a predetermined function of time. The output of the sensor 62 of the position of the rod 10 is connected to the first input 64 of the control signal generation unit 63, the output 65 of which is connected to the control means proportional to the controlled pressure valve 37, and the block 63 is provided with a unit (not shown) connected to its input 66 and an adder for adding the current value of the dynamic head when the output signal is changed at the sensor 62, the position of the rod 10 with a predetermined dynamic IM head as a correction value.
    Hydraulic control device operates as follows.
    During the plasticization process of the rubber material from the rotating screw 4, the plasticized material, with the non-return valve 16 open and the shut-off valve 17 closed, enters the material cylinder 8, while the material piston 9 moves to the left end position. At the end of the dynamic pressure phase of the static pressure, the shut-off valve 17 opens and plasticized rubber material is injected in the direction of the arrow into the mold (not shown), with
    five
    7
    ABOUT
    0
    50

    0 5
    15 4
    This check valve 16 is locked with increasing specific pressure.
    By switching the four-way two-way valve 55 and the pressure on the pressure control valve 60 in the pressure chamber 13, a predetermined predetermined pressure is established. By switching the four-way three-position valves 22 and 35 and by pre-feeding the maximum initial pressure value onto the proportional-controlled pressure valve 37 in the pressure chamber 14, the corresponding relative area pressure is established. Pressure in the pressure chambers. 13 and 14 are preset so that the working piston 12 is in a quiescent state. Then, the control pressure on the pre-adjusted pressure limiting valve gradually decreases until the working piston 12 begins to perform axial movement. Due to this, the output signal at the sensor 62 of the position of the rod 10 is changed, the block 63 receives the registered. The instantaneous pressure value in the injection chamber 14 and as a correction value is added to the dynamic pressure previously set as the nominal value. The dynamic head phase proceeds with the adjusted dynamic head. The correction value is determined at the beginning of each phase of the dynamic head.
    Since, due to the axial movement of the material piston 9 or, respectively, the screw during the dynamic head phase relative to the phase specific pressure and the feed pressure, the plasticity material enters the annular gap bounded by the screw or, respectively, material piston 9 and the inner wall of the material cylinder the material during the phase of the specific pressure and feed pressure undergoes full vulcanization. The presence of a constant dynamic head in the annular gap prevents an increase in pressure on the rubber material intended for plasticization, preventing the rupture of a fully vulcanized film, which eliminates the increase in friction work and, consequently, an increase in the temperature of the rubber being plasticized and its premature vulcanization.
    Thus, the proposed device maintains a constant temperature during rubber kneading, since an increase or decrease in temperature by 10 ° C in rubber mass means a reduction or lengthening of the vulcanization time by 50%.
    权利要求:
    Claims (1)
    [1]
    Invention Formula
    Hydraulic extruder control unit for rubber processing by injection molding, containing a plasticizing device with a screw and driven by a hydraulic motor, an injection unit with a hydraulic working cylinder having a working piston with a rod connected to a material piston, and a direct working and reverse chorus injection chamber piston, hydraulic pump for hydraulic motor and working cylinder, means of controlling the working cylinder depending on the specific pressure, and / or the injection rate, the inflating pressure and the dynamic pressure and sensor position working cylinder or rod material
    a piston, a control signal generation unit, the first input of which is connected to the rod position sensor, and the output is connected to control means proportional to the controllable
    A pressure valve, characterized in that, in order to improve the quality of products due to the effective correction of the dynamic head and keeping it constant, it is equipped with a pressure control valve connected by pipeline to the working piston backward pressure chamber, and proportionally controlled pressure valve
    connected by pipeline to the pumping chamber of the forward stroke of the working piston, and the control signal generation unit is equipped with a unit for setting the value of the dynamic
    head and adder adding the current value of the dynamic head when the output signal changes at the rod position sensor with a predetermined dynamic head in
    Quality: Corrective value.
    fB
    t
    1
    Editor L. Veseleveka
    Compiled by L. Koltsov Techr ed M. Khodanych
    Order 799/64 Circulation 565 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Production and printing company, Uzhgorod, Projecto st., 4
    Proofreader M. Demchik
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    同族专利:
    公开号 | 公开日
    US4632651A|1986-12-30|
    AT28592T|1987-08-15|
    EP0135655A1|1985-04-03|
    JPS6011328A|1985-01-21|
    DD231033A1|1985-12-18|
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    JPH0133330B2|1989-07-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3148231A|1961-03-20|1964-09-08|Eastman Kodak Co|Plastic extrusion, apparatus and control|
    US3840312A|1973-04-11|1974-10-08|Control Process Inc|Dynamic pressure control system|
    US3932083A|1973-12-03|1976-01-13|Barber-Colman Company|Injection molding control|
    US4208176A|1975-06-16|1980-06-17|Litton Industrial Products, Inc.|Time independent cycle control for plastic injection molding machines|
    US4325896A|1975-10-08|1982-04-20|Solid Controls, Inc.|Electro-hydraulic ram control apparatus|
    US4135870A|1976-06-03|1979-01-23|Standard Oil Company |Machine for producing additive containing plastic articles|
    DE2725804C2|1977-06-08|1986-07-31|Werner & Pfleiderer, 7000 Stuttgart|Method for building up pressure in a press for an explosive mass and switching arrangement for carrying out the method|
    JPS6260252B2|1978-10-05|1987-12-15|Toshiba Machine Co Ltd|
    JPS5835460B2|1979-09-28|1983-08-02|Hitachi Ltd|
    DE3027698C2|1980-07-22|1990-10-11|Takashi Miura|JPS6225027A|1985-07-25|1987-02-03|Aisin Seiki Co Ltd|Injection molding device|
    EP0279081B1|1987-02-16|1992-09-30|Consiglio Nazionale Delle Ricerche|An apparatus and method for controlling the cross-linking of elastomers in a mould|
    JP2657352B2|1993-09-08|1997-09-24|日精樹脂工業株式会社|Pressure detection method and apparatus for injection molding machine|
    JPH09123241A|1995-10-27|1997-05-13|Sodick Co Ltd|Injection controlling method for screw preplasticating type injection molding machine|
    JP3423963B2|1997-12-01|2003-07-07|新潟鐵工成形機株式会社|Injection molding machine|
    US6604936B2|2001-08-01|2003-08-12|The Goodyear Tire & Rubber Company|Apparatus for injection molding|
    US6572362B2|2001-08-01|2003-06-03|The Goodyear Tire & Rubber Company|Apparatus for injection molding in alternate planes|
    DE10154676B4|2001-11-07|2005-08-18|Carl Freudenberg Kg|Injection molding machine for the production of elastomer and Duromerformteilen|
    JP6177712B2|2014-02-28|2017-08-09|住友重機械工業株式会社|Injection molding machine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE3320520A|DE3320520C1|1983-06-07|1983-06-07|Hydraulic control for extruder injection units for processing rubber|
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