• 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:

    公开号:AT510051A1
    申请号:T0111810
    申请日:2010-07-01
    公开日:2012-01-15
    发明作者:Christian Hefner
    申请人:Christian Hefner；
    IPC主号:
    专利说明:

    • * * t
    14950
    The invention relates to an injection tool for the production of components by injection molding, with a plurality of cavities for molding a product, with an injection nozzle for injecting plastics for each cavity, wherein an injection nozzle has an injection channel which can be closed by a nozzle needle to the injection process to be controlled, and wherein an actuating device is provided, which is adapted to move the nozzle needle between a first end position and a second end pitch in the axial direction, wherein an adjustable stop is provided which determines the first end position. conventional injection molds for carrying out injection molding processes have a nozzle needle which is adjustable in the axial direction in order to control the injection process. Conventional needle valve systems are driven pneumatically, hydraulically, mechanically or electrically. The needle between a first end position (open) and a second Endsteliung (closed) is movable.
    In order to control the injection quantity and the speed of the material flow, it is known to make the first end position adjustable in order to possibly be able to reduce the opening cross section in the area of the needle tip. In this way, a uniform product quality can be ensured in an injection tool having a plurality of cavities, since it can not be avoided that unequal flow conditions occur during the inflow of the material due to unavoidable temperature differences, surface condition, unequal distribution channels and the like even with careful design of the injection tool , By adjusting the opening position of the nozzle needle, these irregularities can be compensated, so that the quality of the manufactured end products can be secured. It is known to adjust the end position of the nozzle needle mechanically, but this is only possible with an interruption of the production process. The adjustment process is correspondingly complex and causes a reduction in production capacity due to the production stoppages. In addition, there is always the risk of production of broke after a standstill of the injection tool.
    In order to avoid these disadvantages, mechanical systems have become known which permit adjustment of the flow cross-section in a tool having a plurality of cavities. Due to the complexity of these devices, they are limited to tools with a relatively small number of cavities, which moreover must have an adapted arrangement (linear) to accommodate the requirements of the adjuster.
    The object of the present invention is to obviate the above-mentioned drawbacks and to provide an injecting tool which enables a precise adjustment of injection quantity and injection speed without requiring an interruption of the production process. The device should be simple and inexpensive and ensure high production quality.
    According to the invention it is provided that the adjustable stop is designed as a screw which is coaxial with the nozzle needle and is adjustable by an electric motor. An essential aspect of the invention is that it is not necessary to perform the adjustment of the nozzle needle itself electrically, so that, for example, a simple and inexpensive pneumatic drive can be used. By the electric motor, which is provided individually for each nozzle needle, only a stop for the nozzle needle is adjusted, so that an electric motor with comparatively low power and low torque can be used. The inventive device is therefore simple and inexpensive to produce, but at the same time extremely flexible, since in principle each individual cavity can be recalibrated after each shot.
    Preferably, the electric motor is designed as a stepping motor, that is, by a control device, a desired position for the screw can be specified, which determines the first end position of the nozzle needle. The desired position is approached by the stepper motor precisely and with high repeatability.
    The injection tool according to the invention is particularly preferably suitable, in the cold runner method, i. to be used for the processing of silicone and similar materials. The entire injection system is held up to the cavity in a relatively narrow temperature range, on the one hand to ensure the required minimum temperature, which ensures a sufficiently low viscosity of the material, and on the other hand, is prevented by limiting the maximum temperature premature curing.
    By the injection tool according to the invention, each electric motor can be controlled individually and independently, with no mechanical connection between the individual injectors is required. The number and the arrangement of the cavities is not subject to any additional restriction due to the adjusting system for the nozzle needle and can therefore be optimized within wide limits with regard to the products to be produced.
    A particular advantage of the solution according to the invention is that it is also possible by the adjustment, to close the injector completely. Thus, a cavity can also be switched off immediately during the production process, if this is indicated due to any problems.
    Furthermore, the present invention also relates to a method for the production of products by injection molding, wherein the plastic is injected simultaneously into a plurality of cavities of an injection tool, wherein the plastic is introduced into each cavity via an injection nozzle, which is closed by a nozzle needle to set the injection end , and wherein the injection quantity and speed is determined by an adjustment of a first end position of the nozzle needle
    According to the invention it is provided that the first setting is adjusted by an electric motor individually for each injector. In particular, this adjustment can be carried out continuously during the production process, i. in the extreme case, a separate adjustment process is carried out for each shot, if, for example, corresponding sensor arrangements are provided in order to provide measurement results for each cavity which are necessary for the optimization of the injection process. In this case, the adjustment of the stop in the break between the individual injection events, ie immediately before the next injection process, be performed when the stop is not loaded.
    In the following, the present invention will be explained in more detail with reference to the embodiment shown in the figure.
    FIG. 1 shows schematically an injection tool according to the invention and FIG. 2 shows a detail of FIG. 1.
    The injection tool of Fig. 1 consists of a plurality of mold plates 1, 2, 3 with a heat insulating layer 4 between the plates 2 and 3. In the mold plate 1, a plurality of cavities 5 are formed, in which workpieces, not shown, are produced by an injection molding process. In the mold plates 2 and 3 injection nozzles 6 are used, which are supplied via a supply channel 7 with the plastic, which is the raw material. The third mold plate 3 is adjoined by further tool plates 8a, 8b, 9, in which a pneumatic channel 10 is formed, which is provided for supplying the injection nozzles 6 with compressed air. In a further plate 11, a drive for a not shown here stop the nozzle needle 14 is provided and in a cover plate 12 a plurality of electric motors 13 are arranged.
    In Fig. 2, an adjusting device for the stop of the nozzle needle 14 is shown in detail. The nozzle needle 14 is used in a known manner for closing a nozzle opening in order to allow precisely defined start and end of the injection process. Seals 15 serve to prevent the material from rising during the injection molding process beyond the plates 8a, 8b. A piston 16 is used to actuate the nozzle needle 14. For this purpose, compressed air is supplied via channels 10a, 10b in order to move the nozzle needle 14 in the direction of the double arrow 17. At the top of the piston 16, an adjustable stop 18 is provided, which is fastened to a screw spindle 19, which is held in an insert 20 of the plate 11. A stub shaft 21 of the motor 13 engages the screw spindle 19 and rotates it so that the stopper 18 moves in the axial direction (double arrow 22).
    In this way it is possible to fine tune the material flow for each individual cavity during the production process.
    权利要求:
    Claims (8)
    [1]
    1. Injection mold for the production of components by injection molding, with multiple cavities (5) for forming one product each, with an injection nozzle (6) for injecting plastics for each cavity (5), one Injection nozzle (6) having an injection channel which is closed by a nozzle needle (14) to control the injection process, and wherein an actuating device is provided which is adapted to the nozzle needle (14) between a first end position and a second end position To move axial direction, wherein an adjustable stop (18) is provided, which determines the first end position, characterized in that the adjustable stop (18) is designed as a screw which is coaxial with the nozzle needle (14) and by an electric motor (13 ) is adjustable.
    [2]
    2. Injection tool according to claim 1, characterized in that the electric motor (13) is designed as a stepping motor.
    [3]
    3. Injection tool according to claim 1 or 2, characterized in that the actuating device is designed pneumatically.
    [4]
    4. injection tool according to one of claims 1 to 3, characterized in that it is designed as a cold runner tool.
    [5]
    5. Injection tool according to one of claims 1 to 4, characterized in that a control device is provided which control the electric motor (13) of each injection nozzle (6) independently.
    [6]
    6. Injection tool according to one of claims 1 to 5, characterized in that the first end position is adjustable up to a closed position for the injection nozzle (6).
    [7]
    7. A process for the production of products by injection molding, wherein the plastic is injected simultaneously into a plurality of cavities (5) of an injection tool, wherein the plastic in each cavity (5) via an injection nozzle (6) is introduced, which through a nozzle needle (14) is closable to festzuiegen the injection end, and wherein the injection quantity and speed by an adjustment of a first end position of the nozzle needle (14) is set, characterized in that the first end position is adjusted individually by electric motor for each injection nozzle (6). • * - 6 -
    [8]
    8. The method according to claim 7, characterized in that the adjustment of the first end positions of the nozzle needles (14) is carried out immediately before the injection process. / 2010 07 01 Ba / Sc Patent Attorney Dipl.-Ing. Mag. Michael Bafoeiuk A-1150 Vienna, Marlsh! Lf * r GOrt ^ l 39/17 v :: (+ 4J)) m 80 »ö fae (ι43 I) 892 89 333! Ϊ́Ί * 4 * ΐΙ · · χϊ
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    同族专利:
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    EP2588292B2|2021-03-10|
    AU2011273631A1|2013-02-21|
    AU2011273631B2|2015-07-16|
    DK2588292T4|2021-06-14|
    US9039954B2|2015-05-26|
    PT2588292T|2017-12-29|
    DK2588292T3|2018-01-08|
    EP2588292A1|2013-05-08|
    WO2012000924A1|2012-01-05|
    AT510051B1|2012-04-15|
    US20130175735A1|2013-07-11|
    EP2588292B1|2017-09-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5078589A|1990-06-15|1992-01-07|Osuna Diaz J M|Multicavity injection molding apparatus having precision adjustment and shut off of injection flow to individual mold cavities|
    DE4032500C2|1990-10-12|1994-12-08|Gellert Jobst U|Process for producing a multi-component injection molded part and multi-mold injection molding device|
    CH686715A5|1993-11-26|1996-06-14|Tetra Pak Suisse Sa|Completion of packages in parallel by injection moulding onto prepd. containers|
    US6228309B1|1998-12-22|2001-05-08|Husky Injection Molding Systems Ltd.|Method and apparatus for injection molding including valve stem positioning|
    JP2001170977A|1999-12-16|2001-06-26|Canon Inc|Injection molding method and injection molding apparatus for thermosetting resin using the method|
    AT5750U1|2001-11-14|2002-11-25|Hefner Elastomere Technik Gmbh|INJECTION NOZZLE FOR RUBBER, RUBBER AND POLYSILOXANE|
    US20070122519A1|2005-11-28|2007-05-31|Yudo Co. Ltd.|Apparatus for controlling resin amount in cylinders of injection molding machines|
    AT482068T|2007-02-21|2010-10-15|Mold Masters 2007 Ltd|Hot Runner Controller|
    US7695654B2|2007-11-06|2010-04-13|Husky Injection Molding Systems Ltd.|Method of molding system, including raising temperature of feedstock responsive to a calculated amount of thermal energy|
    AT510051B1|2010-07-01|2012-04-15|Christian Hefner|INJECTION TOOL|AT510051B1|2010-07-01|2012-04-15|Christian Hefner|INJECTION TOOL|
    US9358713B2|2012-07-12|2016-06-07|Otto Männer Innovation GmbH|Injection molding apparatus with active valve pin disengagement|
    US9387616B2|2012-08-03|2016-07-12|Otto Männer Innovation GmbH|Hot runner injection molding apparatus with additional controller|
    DE102019128754B3|2019-10-24|2021-01-07|Carl Freudenberg Kg|Injection molding nozzle for an injection molding tool and injection molding tool|
    法律状态:
    2020-04-15| MF02| Nullification of the patent|Effective date: 20120415 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1118/2010A|AT510051B1|2010-07-01|2010-07-01|INJECTION TOOL|ATA1118/2010A| AT510051B1|2010-07-01|2010-07-01|INJECTION TOOL|
    DK11727467.0T| DK2588292T4|2010-07-01|2011-06-27|INJECTION TOOL FOR MANUFACTURING COMPONENTS BY INJECTION MOLDING|
    PT117274670T| PT2588292T|2010-07-01|2011-06-27|Injection tool for producing components by injection moulding|
    EP11727467.0A| EP2588292B2|2010-07-01|2011-06-27|Injection tool for producing components by injection moulding|
    PCT/EP2011/060689| WO2012000924A1|2010-07-01|2011-06-27|Injection tool for producing components by injection moulding|
    AU2011273631A| AU2011273631B2|2010-07-01|2011-06-27|Injection tool for producing components by injection moulding|
    US13/807,930| US9039954B2|2010-07-01|2011-06-27|Injection tool for producing components by injection moulding|
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