• 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:
    Closing unit of an injection molding machine with a fixed platen (2), a movable platen (3) and at least one bearing element (4) for mounting the fixed platen on a machine frame (5), wherein the at least one bearing element (4) at accelerations and decelerations of the movable Mold clamping plate (3) for reaching the closed position such movements of the fixed platen (2) relative to the machine frame (5) allows that rotations and / or movements across a machine axis of the fixed platen (2) relative to the movable platen (3) substantially prevented are.
    公开号:AT513996A2
    申请号:T1262013
    申请日:2013-02-19
    公开日:2014-09-15
    发明作者:Stephan Eppich
    申请人:Engel Austria Gmbh；
    IPC主号:
    专利说明:

    ··· ♦ • «· · ·» · · · · · ♦ * · · · · · · · · · · · · · · · · T * · * Φ »72728 32 / sk 1
    The invention relates to a closing unit of an injection molding machine with the features of the preamble of claim 1.
    In general, by accelerating or decelerating the movable platen undesirable movements - especially inclinations and vibrations - the movable platen, the fixed platen and optionally the face plate on. In particular, when spars are present, these inclinations and vibrations are also transmitted from each other to the different plates. When braking the movable platen this is particularly harmful because the impact of the two tool halves by non-parallelism Abnützungen to damage can be the result. Another problem arises in the manufacture of components that require very high precision. By the mentioned plate inclinations, for example, results in an offset, so that the two tool halves are not exactly placed on each other. Especially with optical components, such as small lenses, this can lead to a high reject rate.
    This mechanism is particularly reinforced in horizontal clamping units with four bars and a toggle mechanism. The generated during braking of the movable platen inclination of the end plate and transmitted through the spars - the fixed platen is also adapted by the movable platen. The reason for this is the eccentric introduction of force from the machine axis.
    In order to minimize the effects of inclinations and vibrations on the injection molded product or the broke, the only thing left is to make the closing movement slower, which naturally has a detrimental effect on the cycle time.
    The problem of plate parallelism is the subject of many patent publications. Examples which may be mentioned are EP 1 837 153 A1 or JP 4-135705. In these 2/20
    II Μ ··· β II ····· * ·· * ·, * ··· «··· * · · ·« ··· ♦ ···· # ·· · I t «« «·· · ≫ · · • · · · t * · · ^ ·· · ·
    Fonts are tried to solve the problem by means of a tilt setting of the fixed platen.
    Another closing unit which is intended to offer a very good plate parallelism is known from EP 1 726 425 A1. By a raised frame on the sides better storage and in particular a good parallelism of the plates should be achieved even under the contact pressure of an injection nozzle. Since this requires an extremely high cost of materials, this is in great need of improvement.
    A disadvantage of all these constructions is that although partially the plate parallelism is improved, but the offset caused by the simultaneous inclination of the movable and the fixed platen, no correction undergoes. Furthermore, the vibrations caused by the acceleration of the movable platen are transmitted directly between the machine frame and the fixed platen.
    Not generic are closing units as they are known for example from WO 96/11785. Although also mold platens are flexibly stored here. However, this serves to maintain the plate parallelism under closing force. The forces and movements occurring here are therefore completely different from those in the movement of the movable platen to reach the closed position.
    The object of the invention is to provide a clamping unit, which is characterized by a simple construction, improved plate parallelism, low transmission of vibrations and the ability to precision injection molding by avoiding misalignment between plate centers by accelerating the movable platen.
    This object is achieved by a clamping unit with the features of claim 1. 3.20
    This is done by the at least one bearing element during accelerations of the movable platen to reach the closed position such movements of the fixed platen relative to the machine frame allows that rotation and / or movements across a machine axis of the fixed platen relative to the movable platen are substantially prevented. It should therefore be kept as accurately as possible during the closing movement by decoupling the fixed platen from the machine frame, the target position of the fixed platen.
    Further advantageous embodiments of the invention are defined in the dependent claims.
    Particularly for the precision spraying of optical components, it is preferably provided that, when the movable platen is accelerated to reach the closed position, the at least one bearing element allows such a movement of the fixed platen relative to the machine frame that inclinations of the fixed platen are at least reduced. In other words, the fixed platen is mounted so that when accelerations of the movable platen, which thereby translated forces acting on the fixed platen is not translated into a tilting movement of the fixed platen, but in a movement along the machine axis. Thus, since the movement of the movable platen is converted into innocuous movements along the machine axis, this represents a significant improvement.
    Particularly effectively, the compensation of inclinations and vibrations can be designed by the at least one bearing element allows movements of the fixed platen substantially along a machine axis.
    In order to better suppress tilting movements, it can be provided that the at least one bearing element has at least one elastic zone. • ······ > ················································································.
    A simple storage of the fixed platen can be achieved by exactly two storage elements are provided.
    To largely decouple the movements of the fixed platen and the machine frame to each other, it may be provided that an exemption between the fixed platen and the machine frame is made.
    Structurally particularly simple storage can be designed by the at least one bearing element is fixed to the sides of the fixed platen.
    In order to make the best possible use of lever ratios during accelerations of the movable platen, it is preferably provided that the at least one bearing element is fastened to the fixed platen above a middle of the plate of the fixed platen. This is especially true in a closing unit with four bars, because the fact that the closing drive acts essentially in the machine axis and the movable platen and possibly the face plate are mounted on the machine frame, there is a stronger movement for the upper part of the fixed platen or, where appropriate for the upper spars. Due to the displacement of the attachment point on the machine axis, therefore, the lever arm for these movements in the upper part of the fixed platen is shortened and of course the lever arm for the movements of the lower part of the fixed platen extended.
    In a preferred embodiment of the invention, it is provided that the at least one bearing element trapezoidal - preferably parallelogram - is formed. This design is a particularly cost-effective, because material-saving, dar. 5/20 • ♦ • ··· • · · · · • • • ····································· «
    Further advantages and details of the invention can be taken from the figures and the associated description of the figures. Showing:
    Fig. 1 Fig. 2a to 2f
    Fig. 3a to 3c
    5 shows a side view of a closing unit according to the invention, a clarification of the effect principle or the difference in action between closing units from the prior art and clamping units according to the invention, side views of a storage according to the invention a fixed platen in three different acceleration states, another embodiment of the invention and a another embodiment of the invention.
    The closing unit 1, which is shown in Figure 1, has a toggle mechanism 9 and four bars 8 (since this is a side view, only two bars 8 are visible). Both the front plate 10 and the movable platen 3 are slidably mounted, wherein only a linear guide 12 for the movable platen 3 and rollers 13 for the end plate 10 are shown here by way of example.
    The fixed platen 2 is mounted on the bearing element 4, wherein the attachment between the bearing element and the fixed platen is solved in each case via three fastening bolts 11. This storage is above the machine axis X, which is optimal for suppressing the inclination and thus the offset between the mold halves when accelerating the movable platen. The fastening element 4 is fastened by screws to the machine frame 5.
    An exemption 7 between the fixed platen 2 and the machine frame 5 ensures that the fixed platen 2 is supported only on the bearing element 4. Thus, the storage, which allows movements along the machine axis X, but suppresses inclinations of the fixed platen, can be fully effective. 6/20 • 6 • ♦ • · · • · *
    In the figures 2a to 2f now the operation of the storage is described in more detail.
    Figure 2a is a horizontal closing unit of the prior art, Figure 2b is an inventive. Only in these two figures, the toggle mechanism 9, the linear guide 12 and the rollers 13 for sliding mounting of the movable platen 3 and the end plate 10 are shown. In the figures 2c to 2f these are of course also available, but not shown for reasons of clarity.
    FIG. 2 c shows a horizontal closing unit of the prior art when the movable platen 3 is accelerated. The toggle mechanism causes the front plate 10 to tilt to the left, which is also transmitted to the fixed platen 2 via the bars 8. Furthermore, the toggle mechanism 9 ensures that the movable platen 3 undergoes a tilt to the left. If a hydraulic ram were used as a drive here, the movable bolster would tilt to the right during acceleration due to the changed kinematics. Also recognizable is the deformation of the machine frame 5 by the inclination of the fixed platen 2. These vibrations that are transmitted in this way in the machine frame 5, of course, are not beneficial.
    FIG. 2d shows a closing unit according to the invention during acceleration of the movable platen 3. The fact that the fixed platen allows a small movement to the left, without having to experience a tilt, the inclinations of the face plate 10 and the movable platen and of course the fixed platen 2 are almost completely suppressed. This is done, as mentioned, by a small compensation movement of the fixed platen 2. It is also important that both the face plate 10 and the movable platen 3 are slidably mounted. 7/20 • · »» · · · · · · · · ·················································································. Similar to FIG. 2c, a closing unit of the prior art is shown in FIG. 2e when the movable platen 3 is being decelerated. This results in a tendency of the end plate 10 to the right, which is also transmitted via the spars 8 on the fixed platen 2. Furthermore, the toggle mechanism again ensures that the movable platen 3 also tilts to the right. Of course, vibration in the machine frame are transmitted through the fixed platen again.
    Both in Figure 2c and in Figure 2e clearly shows the offset, which is generated by the inclinations of the fixed platen 2 and the movable platen 3.
    FIG. 2f now shows the behavior of a closing unit according to the invention during braking of the movable platen 3. The mounting element 4 allows the fixed platen to compensate for small compensation to the right, without simultaneously forcing a tilt to the right of the fixed platen 2. As a result, the face plate 10 remains upright. The same applies to the movable platen 3 by means of the toggle mechanism 9. Neither in the situation in Figure 2d nor in Figure 2f are vibrations in the machine frame 5 transmitted.
    Furthermore, there is no offset between the tool halves.
    The storage in the states of FIGS. 2b, 2d and 2f is now shown in FIGS. 3a to 3c. Clearly visible here is the release 7. In this embodiment with a parallelogram as a storage element 4, the elastic zones 6 are each at the corners of the parallelogram. During acceleration (FIG. 3b) and during braking (FIG. 3c), these allow the parallelogram to be offset along the machine axis X on the upper side, the underside of the parallelogram remaining fixed to the machine frame 5.
    FIG. 4 shows a further embodiment of the invention. The bearing element 4 has a T-beam, the broad side rests on the bottom of the machine frame 8/20 to prevent inclinations. The elastic regions 6 are here designed as two spring elements, by means of which slight movements along the machine axis X are made possible.
    FIG. 5 shows yet another embodiment. Here, the storage element is designed as an upright support rod, at the top of the fixed platen is mounted on a hinge 14. In this case, the upright support rod itself forms the elastic region 6. The joint 14 ensures that, in the case of an elastic deformation of the upright support rod, no moment acting on an inclination of the fixed support platen occurs.
    The present invention is not limited to the embodiments shown here. For example, the invention can just as well be used with horizontal clamping units with a hydraulic punch instead of a toggle mechanism.
    Innsbruck, 18 February 2013
    权利要求:
    Claims (12)
    [1]
    72728 32/32 ······················································································································································································································ 1. The clamping unit of an injection molding machine with a fixed platen (2), a movable platen (3) and at least one bearing element (4) for mounting the fixed platen on a machine frame (5), characterized in that the at least one bearing element (4) during acceleration and deceleration of the movable platen (3) to achieve the closed position such movements of the fixed platen (2) relative to the machine frame (5) allows that rotations and / or movements transverse to a Machine axis of the fixed platen (2) relative to the movable platen (3) are substantially prevented.
    [2]
    2. Horizontal closing closing unit according to claim 1, characterized in that the at least one bearing element (4) such movement of the fixed platen (2) relative to the machine frame (5) allows for accelerations and decelerations of the movable platen (3) to achieve Closed position occurring inclinations of the fixed platen (2) are substantially prevented.
    [3]
    3. Closing unit according to claim 1 or 2, characterized in that the at least one bearing element (4) movements of the fixed platen (2) substantially along a machine axis (X) allowed.
    [4]
    4. Closing unit according to at least one of claims 1 to 3, characterized in that the at least one bearing element (4) has at least one elastic zone (6).
    [5]
    5. Closing unit according to at least one of claims 1 to 4, characterized in that exactly two bearing elements (4) are provided for mounting the fixed platen (2). 10/20 72728 32/32 · · · - - - - - - - - - - - - - - - - - ··· ····
    [6]
    6. Closing unit according to at least one of claims 1 to 5, characterized in that an exemption (7) between the fixed platen (2) and the machine frame (5).
    [7]
    7. Closing unit according to at least one of claims 1 to 6, characterized in that the at least one bearing element (4) on the sides of the fixed platen (2) is fixed.
    [8]
    8. Closing unit according to at least one of claims 1 to 7, characterized in that the at least one bearing element (4) is fixed to the fixed platen (2) above a middle of the plate fixed platen (2).
    [9]
    9. Closing unit according to at least one of claims 1 to 8, characterized in that the at least one bearing element (4) trapezoidal - preferably parallelogram - is formed.
    [10]
    10. Closing unit according to at least one of claims 1 to 9, characterized in that the closing unit has four bars (8) which pass through the movable platen (3) and the fixed platen (2). I i
    [11]
    11. Closing unit according to at least one of claims 1 to 10, characterized in that the closing unit (1) has a toggle mechanism (9).
    [12]
    12. Closing unit according to at least one of claims 1 to 11, characterized in that the closing unit (1) is designed as a horizontally closing closing unit (1). Innsbruck, 18 February 2013 11/20
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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
    DE1577159A1|1965-05-20|1970-03-05|Bliss E W Co|Press frame|
    JP3506829B2|1996-02-01|2004-03-15|東芝機械株式会社|Mold clamping device of precision injection molding machine|
    US5910328A|1996-02-22|1999-06-08|Toshiba Kikai Kabushiki Kaisha|Clamping apparatus for precise injection molding|
    US20080174038A1|2007-01-24|2008-07-24|Husky Injection Molding Systems Ltd.|Platen Assembly, Molding System and Method for Platen Orientation and Alignment|AT16789U1|2019-01-31|2020-09-15|Engel Austria Gmbh|Forming machine|JP2767316B2|1990-09-27|1998-06-18|ファナック株式会社|Mold clamping device in injection molding machine|
    US5650182A|1994-06-14|1997-07-22|Hemscheidt Maschinentechnik Schwerin Gmbh & Co.|Barless mold closing device for injection molding machines|
    EP0835731B1|1994-10-14|1999-01-27|Engel Maschinenbau Gesellschaft Mbh|Injection moulding machine|
    JP3635220B2|2000-02-28|2005-04-06|東芝機械株式会社|Injection molding machine|
    AT4348U1|2000-06-07|2001-06-25|Engel Gmbh Maschbau|INJECTION MOLDING MACHINE|
    JP4546268B2|2004-01-30|2010-09-15|東芝機械株式会社|Moving mold support device and mold clamping device|
    JP4185921B2|2005-05-25|2008-11-26|ファナック株式会社|Injection molding machine|
    JP4021459B2|2006-03-24|2007-12-12|ファナック株式会社|Molding mechanism of injection molding machine|
    WO2009051095A1|2007-10-19|2009-04-23|Sodick Plustech Co., Ltd.|Horizontal mold clamping device of injection molding machine|
    JP5180131B2|2009-03-30|2013-04-10|ファナック株式会社|Fixed platen of injection molding machine|
    CN103568229B|2012-07-26|2016-08-24|住友重机械工业株式会社|Injection lding) machine|JP6448094B2|2016-08-23|2019-01-09|株式会社名機製作所|Mold rotary injection molding machine and mold member replacement method for mold rotary injection molding machine|
    AT519691B1|2017-02-15|2019-03-15|Engel Austria Gmbh|Mold-closing unit for a molding machine|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA126/2013A|AT513996B1|2013-02-19|2013-02-19|Closing unit of an injection molding machine|ATA126/2013A| AT513996B1|2013-02-19|2013-02-19|Closing unit of an injection molding machine|
    DE201410001206| DE102014001206A1|2013-02-19|2014-01-30|Closing unit for an injection molding machine|
    US14/176,336| US20140234472A1|2013-02-19|2014-02-10|Closing unit of an injection molding machine|
    CN201410055815.XA| CN103991189A|2013-02-19|2014-02-19|Closing unit of an injection molding machine|
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