• 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:
    1. HYDRAULIC CONTROL SYSTEM OF THE MECHANISM OF THE DETERMINATION OF THE CASTING MACHINE UNDER PRESSURE, containing movable plate displacement cylinders, half-form closing cylinders mounted on the ends of the columns, locking cylinder, characterized in that, to ensure speed, the piston cavity of the cylinder of the cylinder 27 is closed. associated with a pressure flow generator 2 and / or with a hydroaccumulator 36, while the columns are equipped with a cam rail 21, electrically connected through a switch 20 to the electromagnet of the valve 2 2. 2. The hydraulic system according to claim 1, characterized in that it is provided with a check valve 23 located between the pressure flow generator 2 and the hydraulic accumulator 36, and the pressure limiting valve 37 connected in parallel, and the piston and rod cavity 1 Schlind- The harnesses 12 are connected to a pressure flow generator 2 through electromagnet valves 4 and 9, while the cylinder rod locks 27 is provided with a cam rail 41, electrically connected through a switch 40 to the solenoid valves.
    公开号:SU1152706A1
    申请号:SU807771414
    申请日:1980-10-10
    公开日:1985-04-30
    发明作者:Лотар Элзнер；Клаус Фюллер；Фолкер Шолц；Клаус Ваббелс
    申请人:Феб Комбинат Умформтехник "Херберт Варнке", Эрфурт (Инопредприятие)；
    IPC主号:
    专利说明:

    t The invention relates to a foundry, in particular to injection molding, and can be used on injection molding machines, injection molding machines and presses. Closest to the invention is a hydraulic system controlling the locking mechanism of an injection molding machine comprising fixed and movable plates for securing the half-molds. The hydraulic system contains movable plate displacement cylinders, cylinders for the fabric of half-molds mounted on the columns of the columns and cylinder locking. After locking, the columns perform the function of closing pistons and, moreover, act as electronic elements, which is carried out using a cam mechanism. There are rings with internal teeth in the movable plate. The columns are rigidly fixed to the sleeves with a double-sided flange on the side where there is a plate with a half-form, the shoulder has grooves through which the internal teeth of the movable plate pass through the circuit. During the forced movement, controlled by the cam mechanism, the columns are moved in the axial direction for turning the circuit, in the radial direction are turned by a Specific angle of rotation, which is necessary for the interaction of the outer teeth of the collar with the internal teeth. After this, the short stroke closing cylinders are switched without interrupting the movement of the closure (DG patent No. 132944, class B 29 F 1/022, 1980). However, the cam guides for sleeves and columns wear out quickly. The locking mechanism is susceptible to jamming, which is explained by the use of four columns with relatively large mass and complex kinematic coupling. In addition, the control characteristic of the cam mechanism requires a long one: the piston stroke over the cloth, which acts only during the locking time. As a result, a large amount of hydraulic fluid is sucked in and sucked in, which leads to a strong deceleration of the movement of the mounting plate in the last part of the piston stroke. The purpose of the invention is to provide speed. 706 The goal is achieved by the fact that, in a hydraulic system controlling the mechanism of machine locking, an injection molding containing movable plate displacement cylinders, half-form closing cylinders installed at the ends of the columns, a cylinder of locking, a piston cavity of the cylinder is locked through a solenoid valve and / or with a hydroaccumulator, wherein the columns are equipped with a rail electrically connected through a switch to the valve electromagnet. In addition, the hydraulic system is equipped with a check valve located between the pressure flow generator and the hydraulic accumulator, and a pressure limiting valve connected in parallel, and the piston and rod cavity of the closing cylinder are connected to the pressure flow generator through the electromagnetic valves, while the cylinder rod is locked with a cam rail electrically connected through a switch with solenoid valves. FIG. 1 shows the locking mechanism, a partial cut; in fig. 2 hydraulic control system. The injection molding machine comprises a movable plate 18 for fastening a half-form (not shown), moved by means of accelerated-stroke cylinders 17. Columns 16 are installed in an additional base plate 31 and enter the fixed plate 30 in which there is a filling nozzle. The columns together with the piston 15 of the cylinder 12 form a functional unit. The piston 15 is subjected to pressure from two sides. With the aid of core nuts 19, the required mounting gap is established. The locking cylinders 27 are located directly on the movable plate 18. The pair-mounted locking elements 33 move eccentrically in the radial direction relative to the columns 16. This is done with help (of the pistons 35. The locking of the columns thus occurs together with the movable plate 18 on which the ejector pushers are placed The pressure cavities 26 and 29 of the cylinder lock 27 are connected to the pipes 25 or 38. On the column 16 there is a cam rail 21 attached, which actuates the switch 20 depending on the path. The command to connect the locking mechanism is given.The protrusion 43 is located directly at the locking cylinder 27 with the switch 40. The locking rod 42 of the locking cylinder 27 has a cam rail 41 at the lower end. After locking the cam rail 41 actuates the switch 40 and thus gives a signal to create closing force.
    The hydraulic control system includes a drain tank 1, a pressure flow generator 2, solenoid valves 4 and 9 connecting the pressure flow generator 2 to the piston and rod end of the cylinder 12, the solenoid valve 22, connecting the pressure generator 2 to the piston cavity of the cylinder 27 , hydroaccumulator 36, pressure limiting valve 37, check valves 6 and 23, pipelines 3, 5, 7, to, 11, 24, 25, 38, 39.
    The locking mechanism is controlled in the following way.
    In the open position, the casting is removed. The movable plate 18 and the fixed plate 30 thus have the greatest distance between them. In this position, the generator of the pressure flow 2 transports the working fluid from the drain tank 1 to the pipeline 3. In the left position (Fig. 2) of the sliding valve 4, the pipeline 3 is connected to the pipeline 5. The discharge liquid enters the tank t through pipe 5 and the check valve 6. The pressure produced in the check valve 6 is transmitted through line 7 and solenoid valve 4 (left position) to line 8 and also through solenoid valve 9 (left position) to lines 10 and 11. Consequently, both pressure cavities 13 and 14 qi closure lindra 12 are pressurized. The control state of the cylinder with a one-way piston rod is realized by means of the valve 9, thus the piston 15 is held in the left extreme position and subjected to a slight but constant force. Next, the piston 15 displaces the working fluid from
    cylinder 12, it enters through the pipe 10, the valve 9 (left position) and the pipe 11 into the pressure cavity 13 of the cylinder 12 of the circuit 12.
    Excess pressure fluid flows through pipe 8, valve 4 (left position), pipe 7 and non-return valve 6 into tank 1. Pipe 3 through check valve 23, pipe 24, 38 and valve 22 (left position) connects pressure generator 2 at the same time, the pressure chamber 29 of the cylinder is locked 27. The piston 35 is held in the desired initial position. The subsequent casting cycle is accompanied by a pressure field in the accelerated stroke cylinders 17, the movable plate 18 moves towards the fixed plate 30. The inner surfaces of the nozzles 34 and the core nuts 19 are in contact with each other. The kinetic energy of moving the movable plate 18 creates a certain force that is transmitted from the cores nuts 19 on columns 16, forming a sheeting; th functional unit
    with closing cylinder 15. I
    Depending on the way the switch
    20, just before the closure, is driven by a cam rail 21 mounted on the columns 16. An electrical signal is given to block the mechanism. This signal actuates the valve 22 and switches it to the right position. The pressure flow generator 2 transports the working fluid through line 3, the check valve 23 into line 24 and through valve 22 into line 25 connected to the locking cylinder 27. The piston 35 actuates the pairs 33 installed in pairs. During one working cycle the movement is synchronized the movable plate and its locking together with the columns 16. The locking takes place very quickly, since the pipe 24 is connected to the hydraulic accumulator 36, the pressure of which is transmitted through the valve 22 (right position) and the pipelines 24, 25 into the pressure chamber 26 of the cylinder shut-off 27. Pressure-limiting valve 37 provides the operating maximum pressure. Immediately after blocking, a continuous transition occurs to increase the closing force. This process is provided by a switch 40, which, immediately after locking, is actuated by a cytochick rail 41 fixed to the rod 42. The switch 40 interacts with valves 4, 9 which switch to the right position. The pressure generator 2 transports the working fluid through pipeline 3, valve 4, pipeline 8, valve 9 and pipeline to the closing cylinder 12. A closing pressure is formed in the pressure cavity 14 of the closing cylinder 12. The working fluid displaced from the pressure cavity 13 flows through the pipeline I, valve 9, pipes 5, 7 and the check valve 6 into the tank 1. After pouring and cooling the molded product, valve 9 switches to left-hand ventilation. The generator flow pressure 2 transports the working fluid through a set of solenoid valves 4, 9 and pipelines 3, 8 in the pipelines 10, 11. Here the valve 4 is in the right position. The valve 9 moves to the extreme left position of the piston 15 of the cylinder 1F1kan 12. At the same time, the mechanism is unlocked. The valve 22 is in the left position at the same time. The pipeline 24 is connected to the hydroaccumulator 66 66 valve 36 and is connected to the pressure cavity of the cylinder 29 of the cylinder 27 through the valve 22 and the pipe 38. The working fluid required for the release process is in the hydroaccumulator 36. Interlocking columns 33, mounted in pairs, are driven by a piston 35 when pressure is applied to the pressure cavities 29. The mechanism is opened together with the release, without additional time. All of the above is carried out during one working cycle. The hydroaccumulator 36 is refilled during operation cycles when the pressure flow generator 2 operates against the set pressure of the pressure limiting valve 37 to create the force to open and open the mold. In the above, only one cylinder NIN 12 and one cylinder 27 are taken into account. The invention relates to the already known construction of injection molding machines. Four sets of closures 12 and four cylinders are locked 27 completely according to the number of columns 16. This set of cylinders and pistons is included in parallel operation and, thus, the synchronous uninterrupted operation of individual cylinders and pistons is ensured.
    .MJ
     L5
    ifet.r Id
    Fiz.g 55
    权利要求:
    Claims (2)
    [1]
    1. HYDRAULIC CONTROL SYSTEM FOR LOCKING THE MOLDING MACHINE FOR A PRESSURE CASTING MACHINE, comprising cylinders for moving the movable plate, half-circuit closing cylinders mounted at the ends of the columns, a locking cylinder, characterized in that, for the purpose of ensuring speed, the piston cavity of the locking cylinder 27 is connected via an electromagnetic valve 22 with a pressure flow generator 2 and / or with a hydraulic accumulator 36, while the columns are equipped with a cam rack 21, electrically connected through a switch 20 to the valve electromagnet 22.
    [2]
    2. The hydraulic system according to claim 1, characterized in that it is equipped with a check valve 23 located between the generator for the pore stream 2 and the accumulator 36, and a pressure limiting valve 37 connected in parallel, and the piston and rod cavities of the cylinder the jams 12 are connected to the pressure flow generator 2 through the electromagnetic valves 4 and 9, while the rod of the locking cylinder 27 is equipped with a cam rack 41, electrically connected through a switch 40 with the electromagnetic valves.
    <11
    类似技术:
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    US5720918A|1998-02-24|Method and apparatus for closing tool of plastics processing machine
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    SU1414498A1|1988-08-07|Pressing mechanism for die-casting machine
    同族专利:
    公开号 | 公开日
    GB2061804B|1983-10-05|
    DE3031641A1|1981-05-21|
    IT1146994B|1986-11-19|
    SE433923B|1984-06-25|
    YU271480A|1984-06-30|
    IT8050121D0|1980-11-11|
    DD146405A1|1981-02-11|
    FR2469267B1|1986-11-14|
    FR2469267A1|1981-05-22|
    GB2061804A|1981-05-20|
    AT378499B|1985-08-12|
    ATA438880A|1985-01-15|
    BG37255A1|1985-05-15|
    CS268754B1|1990-04-11|
    SE8007954L|1981-05-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DD79378A|
    FR1065384A|1952-07-22|1954-05-24|Improvements made to presses, especially those with hydraulically controlled pistons|
    FR1141429A|1955-05-12|1957-09-02|Italiana Macchine Stampaggio A|Advanced, high-power machine for injection molding of thermoplastic materials|
    US3540081A|1967-08-21|1970-11-17|Us Industries Inc|Vertical injection molding machine|
    CH521837A|1970-03-20|1972-04-30|Buehler Ag Geb|Closing, locking and pre-tensioning device for casting molds|
    US3669599A|1970-12-08|1972-06-13|Nat Automatic Tool Co|Hydromechanical clamp|
    US3833333A|1972-11-06|1974-09-03|G Britten|Press construction|
    FR2251393B1|1973-11-21|1977-09-30|Leguen Et Hemidy|
    US4029457A|1974-06-17|1977-06-14|Toshiba Kikai Kabushiki Kaisha|Molding machine|
    US3940930A|1975-01-20|1976-03-02|Package Machinery Company|Hydraulic system for injection molding machine|
    DD132944A1|1977-05-10|1978-11-22|Klaus Fueller|TOOL CLOSURE AND LOCKING UNIT IN PARTICULAR FOR INJECTION MOLDING MACHINES|
    DE2812301A1|1977-05-10|1978-11-23|Plast Elastverarbeitungsmasch|TOOL LOCKING AND LOCKING UNIT, IN PARTICULAR FOR INJECTION MOLDING MACHINES|IT1219271B|1988-05-06|1990-05-03|Adelio Grasselli|IMPROVEMENT RELATING TO LARGE PRESSES FOR INJECTION MOLDING OF POLYESTER AND ELASTOMER THERMOPLASTIC MATERIALS|
    US5192557A|1990-07-27|1993-03-09|Nissei Jushi Kogyo K.K.|Clamping apparatus for molding machine|
    DE4431260C1|1994-09-02|1995-10-26|Hemscheidt Maschtech Schwerin|Hydraulic circuit for injection moulding machine|
    DE60214347T2|2002-06-06|2007-09-13|Negri Bossi S.P.A.|Mold closing and clamping system for an injection molding machine|
    AT521266B1|2018-10-09|2019-12-15|Engel Austria Gmbh|Closing unit for a molding machine|
    AT521382B1|2018-11-14|2020-01-15|Engel Austria Gmbh|Closing unit for a molding machine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DD21685079A|DD146405A1|1979-11-13|1979-11-13|METHOD AND HYDRAULIC CIRCUIT ARRANGEMENT FOR INJECTION MOLDING|
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