• 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:
    An injection moulding machine comprises a mould closure unit 9 and an injection moulding unit 14 which includes a plasticizing device 5 with a plasticizing screw 13. A drive arrangement is provided which includes a variable-speed electric motor 1, open and closed loop control devices for controlling the speed of the motor 1, and one or two hydraulic pumps 2 acting as pressure flow generators for operating pressure flow loads of the mould closure unit 9 and of the injection moulding unit 14. The drive arrangement also includes force-transmitting machine elements, i.e. a clutch 3 and a transmission gearing 4, for transmitting a torque. During operation of the machine, the motor 1 rotates the plasticizing screw 13 either via the clutch 3 or via the clutch 3 and the transmission gearing 4, and simultaneously drives the two pumps 2. After the plasticizing stage the drive from the motor 1 may be parted from the screw 13 via the clutch 3 and used wholly for the injection stage, e.g. for damping the moulds. <IMAGE>
    公开号:SU943000A1
    申请号:SU797770526
    申请日:1979-04-04
    公开日:1982-07-15
    发明作者:Шолц Фолкер
    申请人:Феб Комбинат Умформтехник Херберт Варнке Эрфурт (Инопредприятие)；
    IPC主号:
    专利说明:

    (54) LOCATION OF DRIVE, IN PARTICULAR CASTING MACHINE
    one
    The invention relates to electro-hydraulic drives, in particular to the special arrangement of the elements of these drives, and can be used in injection molding machines having a variable-speed hydraulic motor as a drive for pressure generators.
    During one working cycle of the injection molding machine, the flow rate and pressure of the hydraulic fluid change. For this reason, it is necessary to use an adjustable hydraulic unit to realize subtle changes in the flow rate and pressure of the working fluid.
    A known injection molding machine, which has a variable-speed electric motor as a drive for oil-flow generators (constant-flow pumps). This electric motor is installed and configured so that it operates in the area of speeds and torques varying accordingly with the pressure and flow requirements of the working fluid during one cycle of the injection molding machine.
    The power of the electric motor is regulated by an electrical control system and
    determined by the request of the injection cycle. The motor supplies all consumers of the pressure flow. The rotational drive of the screw is also driven by an oil flow generator. The energy of the hydraulic working fluid is turned into a rotary motion of the auger by the hydraulic motor.
    However, the implementation of the rotational movement of the screw indirectly by means of hydraulic pumps, hydraulic motors with a working fluid inevitably leads to a high energy loss. In addition, the motor has sophisticated devices to ensure constant temperatures and high purity of the working fluid. This is necessary for constant revolutions and a stepless change in the revolutions by electrical regulation. A hydraulic motor with adjusting devices and piping may cause oil leaks.
    20
    The invention is the creation of an optimal drive that meets the conditions of the casting cycle under pressure, and the reduction of technical and economic costs while increasing profitability.
    The purpose of the invention is to create a common drive unit, which can bring into rotation not only hydraulic generators of the oil-inflowing flow, but also a plasticizing auger, and control and adjustment devices using simple transmission mechanisms.
    This goal is achieved by installing a variable-speed electric motor on the injection molding station of the injection molding machine, which is connected directly through the clutch coupling or via the clutch coupling in connection with other parts of the machine with a plasticizing screw. Thus, the transfer of torque between the motor and the screw is carried out and thereby the rotational movement of the kneading screw is realized. In addition, all oil injection flow generators (hydraulic pumps) required to drive the injection unit and the injection unit are connected to the drive shaft of the electric motor.
    The invention provides for two different ways of positioning the drive, depending on the size of the injection molding machine, the dimensions of the electric motor and hydraulic pumps and the transmission mechanism.
    In one embodiment, the electric motor, oil flow generators (hydraulic pumps), the necessary hydraulic control and regulation devices, the coupling coupling and the transmission mechanism together with the plasticization unit and the injection cylinder form a single unit, the so-called upper part of the injection unit.
    In another embodiment, an electric motor with flanged hydraulic pumps, hydraulic devices to control and regulate the consumed oil injection flow, coupling clutch, propeller shaft and V-belt or gear-and-gear transmission are installed in the lower part of the injection unit, with the gearbox located in the upper part of the injection unit.
    Between the gearbox in the upper part and the drive shaft in the lower part there is a power connection with the possibility of disengagement and axial movement.
    The drive shaft is preferably in the form of a splined shaft for the required axial movement relative to the upper part during reciprocating motion of the nozzle or when the drive shaft is disengaged from the gearbox. The propeller shaft can align the protrudings when driving the axles relative to the gearbox.
    FIG. 1 shows the location of the drive in the upper part of the injection unit; in fig. 2 - the location of the drive in the bottom
    parts of the injection unit; in fig. 3 - one embodiment.
    The electric motor 1, hydraulic pumps 2, the necessary hydraulic control and adjustment devices (not shown in detail in the drawing), the clutch coupling 3 and the gearbox 4 together with the plasticization unit 5 and the injection cylinder 6 form a single unit, the so-called upper part 7 of the injection unit. The upper part 7 is mounted above the lower part 10 of the injection unit movably and connected to the closing unit 9 by means of a cylinder 8 for moving the nozzle.
    The 4-speed gearbox performs the function of a torque converter. She is
    is located behind the cylinder 6 of the injection and is connected to the electric motor 1 by means of the clutch 3. The gearbox 4 and the clutch 3 form one single unit. On the drive shaft of the electric motor 1 are flanged one or more
    hydraulic pumps 2.
    The hydraulic pumps 2 and the hydraulic control and regulation devices are connected to the working fluid tanks located in the lower part 10 of the injection unit and to the closing unit 9 using suction and pressure pipelines (not shown in the drawing).
    To ensure the freedom of movement of the upper part of the suction and pressure
    Pipelines are made in the form of hose lines, telescopic or central pipelines. In this embodiment, a short, fixed connection between the hydraulic pumps 2 and the injection cylinder 6 is obtained, which
    j leads to a decrease in pressure loss. This brings great benefits with a high amount of transported hydraulic fluid during injection.
    The actuator according to the embodiment of FIG. 1, works as follows.
    A DC, AC, or three-phase current motor 1 is powered by a known converter from the supply network electr5. During one cycle of the injection molding machine, a different amount of working fluid is required. The motor 1 receives the corresponding signals from the control and regulation devices. Thus, at certain points of the injection cycle, the motor is tuned to the required speeds and necessary torques. Known control and regulation devices are not described in detail here. The available power of the electric motor is absorbed by the consumers of the oil-injection flow of the closing unit 9, the injection injection unit 14 and the drive for rotating the plasticizing screw 13.
    During the kneading process, the hydraulic pumps 2 operate at idle and absorb a small amount of energy. Most of the nominal power of the motor is consumed by the drive to rotate the kneading jaw 13. This is due to the high performance in plasticizing the plastics. The plasticization and dispensing time is shorter than the cooling time. During cooling, there are no movement processes with an intense flow pressure and therefore no flow of the working fluid occurs.
    After the plasticization process is completed, the drive of the plasticizing screw 13 is disconnected from the electric motor 1 by the action of the clutch 3. The electric power of the electric motor 1 is located at the injection cylinder 6 and the consumers of the oil injection flow in the closing unit 6 and in the injection unit 14. It is possible to open the motor 1 and the bleed screw 13 with the clutch 3 at any time, depending on the characteristics of the cycle, which leads to an advantageous use of drive energy.
    In addition, direct connection of the motor with the screw through the clutch coupling 3 or through the coupling clutch 3 in connection with the 4-speed manual transmission increases the energy efficiency in comparison with other known devices having hydraulic transmission mechanisms between the engine and the screw. A gearbox of 4 gears is selected depending on the required torque and gear ratios.
    In order to reduce the noise level and cost of manufacture in this embodiment, it is advantageous to use a single or two-stage gear transmission. In addition, there is the possibility of combining a gear-and-gear transmission (high speed) with a cylindrical gear mechanism (slow speed), since only a cylindrical gear mechanism has a high level of noise.
    In order to limit the noise, it is possible to use a worm gear. In this case, the longitudinal axis of the electric motor is perpendicular with respect to the longitudinal axis of the machine.
    FIG. Figure 2 shows an embodiment of the invention in which the electric motor 1, hydraulic pumps 2, not shown hydraulic control devices and controls all consumers of the oil-injection flow and transmission mechanisms between the electric motor G and the gearbox 4 are in the lower part 10 of the injection unit 14. An upper part 7 with a plasticizing screw 13 with an injection cylinder 6 and a gearbox 4 is movably mounted over the lower part 10 of the injection unit 14 and is connected to the nozzle movement cylinder 8. The latter is ukregglen on node 9 closure.
    The 4-speed gearbox transmits to the rutting moment a knead-baking jaw. It is located behind the cylinder b injection. The cardan shaft 12 and the V-belt or tooth 10-time transmission 11 establishes a connection between the 4-gear box and the electric motor 1. Between the V-belt or gear-and-gear transmission and the cardan shaft 12 there is a coupling coupling Zdl uncoupling the motor 1 from the screw 13
    The propeller shaft is preferably made in the form of a slit shaft in order to carry out the necessary longitudinal movement of the upper part 7 during the reciprocating movement of the nozzle.
    The use of a drive shaft allows for slight turning movements of the upper part without disengaging from the gearbox. In addition, the cardan shaft 12 aligns the displacement of the axes with respect to the 4-speed gearbox during drive. It is possible to disconnect the 4-gear box and the propeller shaft 12 to rotate the upper part 7 in the event of repairs and shifting operations.
    The principle of operation of the second embodiment of the drive is the same as that of the first embodiment shown in FIG. one.
    权利要求:
    Claims (2)
    [1]
    1. Drive arrangement, in particular, an injection molding machine containing a variable-speed electric motor, a motor control and speed control device, hydraulic pumps as oil-jet flow generators for driving the oil-jet consumers in the closure and injection unit and drive gears
    5 masks for transmitting torque, characterized in that the 1.1 motor with a variable speed directly through the coupling coupling 3.3 or through the coupling coupling 3.3 in connection with other gear components of the machine rotates the plasticizing screw 13, 13, simultaneously to the drive shaft of the electric motor 1, G are flanged and 2.2 hydraulic pumps for driving the consumers of the oil-injection flow.
    five
    [2]
    2. The location of the drive according to claim 1, characterized in that the electric motor 1 with a variable speed, hydraulic pumps 2, hydraulic control devices and a reg
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    同族专利:
    公开号 | 公开日
    GB2022499B|1982-02-17|
    BG32599A1|1982-09-15|
    GB2022499A|1979-12-19|
    DD135876B1|1980-12-10|
    DE2911469A1|1979-11-08|
    CS217417B1|1983-01-28|
    DD135876A1|1979-06-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CH669146A5|1986-03-14|1989-02-28|Netstal Ag Maschf Giesserei|PLASTIC INJECTION MOLDING MACHINE.|
    AT395557B|1988-11-08|1993-01-25|Engel Gmbh Maschbau|INJECTION MOLDING DEVICE FOR PRODUCING MOLDED PARTS FROM THERMOPLASTIC PLASTIC|
    GB2236072A|1989-08-23|1991-03-27|Gerald Dennis Day|Injection moulding apparatus|
    DE19517582C2|1995-05-05|1998-08-20|Mannesmann Ag|Drive for the injection and plasticizing unit of a plastic injection molding machine|
    DE19603012C1|1996-01-18|1997-09-04|Mannesmann Ag|Plasticizing and injection unit of a plastic injection molding machine|
    DE202010002747U1|2010-02-24|2011-07-26|Kraussmaffei Technologies Gmbh|Injection unit for multi-component injection molding|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DD20500478A|DD135876B1|1978-04-26|1978-04-26|DRIVE ARRANGEMENT, ESPECIALLY FOR INJECTION MOLDING MACHINES|
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