• 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:
    Two-component plasticizing unit (20), in particular plastic monosandwich plasticizing unit for a forming machine, comprising - at least one primary injection unit (1) for injecting a first molten component of a molded part into a mold cavity and - at least one secondary injection unit (2) for injection a second molten component of a molded part in the same mold cavity, wherein - a diverting device (3) is provided, through which the second molten component is divertable from the at least one secondary (2) injection unit to the at least one primary injection unit (1) - a movement device is provided, by which the diverting device (3) together with the at least one secondary injection unit (2) is movable relative to a melt outlet opening (4) of the at least one primary injection unit (1) between a first position and a second position s in the first position the melt outlet opening (4) can be pressed against the bypass device (3) and the melt-shaped second component from the at least one secondary injection unit (2) via the bypass device (3) into a receiving space adjoining the melt outlet opening (4) (5) the at least one primary injection unit (1) can be injected, and  in the second position the melt outlet opening (4) of the at least one primary injection unit (1) is movable past the diverter (3) to be in the receiving space (5) second melt-shaped component together with a farther away from the melt outlet opening (4) in the at least one primary injection unit (1) located to inject first molten component in a mold cavity.
    公开号:AT521056A4
    申请号:T50529/2018
    申请日:2018-06-27
    公开日:2019-10-15
    发明作者:Ing Walter Jetzinger Msc；Ing Herbert Zeidlhofer Dipl
    申请人:Engel Austria Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a two-component plasticizing unit for a
    A forming machine having the features of the preamble of claim 1 and a forming machine having such a two-component plasticizing unit.
    A generic two-component plasticizing unit in the form of a plastic monosandwich plasticizing unit is disclosed in EP1 340 607 B1. A monosandwich process is a special case of a two-component molding process in which the first molten component forms a core component in the finished molding and the second molten component in the finished molding forms a skin component surrounding the core component. A vertically arranged secondary injection unit for a skin component is arranged on a rear side (the injection side facing) of a fixed platen. This results in a limitation in the possible diameter of the secondary injection unit with respect to the diameter of the contained therein
    Plasticizing screw (height, stability). There is a risk of collisions of the vertically arranged secondary injection unit with robots and stages located in an area above the fixed platen. It takes a long, cyclical driving stroke of the primary injector, resulting in long cycle times.
    The object of the invention is to provide a generic MonosandwichPlastifiziereinheit and a molding machine with such a MonosandwichPlastifiziereinheit, in which the problems discussed above are avoided.
    This object is achieved by a two-component plasticizing unit having the features of claim 1 and a forming machine having such a two-component plasticizing unit. Advantageous embodiments of the invention are defined in the dependent claims. The invention is particularly suitable for plastic monosandwich injection molding.
    According to the invention, a diverting device is provided, by means of which the second melt-shaped component can be diverted from the at least one secondary injection unit to the at least one primary injection unit. A redirection of the second melt-shaped component takes place in the sense that the / 29
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    Moving direction (this corresponds to an extension direction of the at least one secondary injection unit) of the second molten component at the exit from the at least one secondary injection unit from the direction of movement, in which the second molten component enters the at least one secondary injection unit. The latter direction of movement preferably runs counter to an extension direction of the at least one primary injection unit. The diverter allows placement of the at least one secondary injection unit in a substantially same orientation (apart from a possible - preferably acute - angle between the directions of extension of the at least one primary and secondary injection unit) as that of the at least one primary injection unit.
    By means of a movement device, the diverting device is movable together with the at least one secondary injection unit relative to a melt outlet opening of the at least one primary injection unit between a first position and a second position. Preferably, the at least one primary injection unit remains stationary during this process and only the diverting device and the at least one secondary injection unit are moved by a first movement mechanism of the movement device. Since a second movement mechanism independent of the first movement mechanism may be provided for the at least one primary injection unit, generally the movements of the diversion device and the at least one secondary injection unit may be independent of movements of the at least one primary injection unit.
    In the first position, the melt outlet opening can be pressed against the bypass device and the melt-shaped second component can be injected from the at least one secondary injection unit via the bypass device into a receiving space adjoining the melt outlet opening of the at least one primary injection unit. The pressing can be done by the aforementioned second movement mechanism or by a separate Anpressmechanismus.
    In the second position, the melt outlet opening of the at least one primary injection unit (preferably below it) at the diverter / 29
    83782 36 / eh movable past (preferably displaceable) to inject the second melt-shaped component located in the receiving space together with a first melt-shaped component further away from the melt outlet opening in the at least one primary injection unit into a mold cavity. This passing may be accomplished by means of the second movement mechanism, which may also be used to press the at least one primary injection unit against a mold half.
    An advantage over the prior art is that the second molten component is pushed as far forward as possible into the at least one primary injection unit, thereby requiring little pressing stroke of the at least one primary injection unit by the second movement mechanism and resulting in a reduction the cycle time. Overall, this results in a compact design of the two-component plasticizing unit. There is no risk of collisions of the secondary injection unit (s) with robots or stages which may be located on top of the platen. The invention can also be used for large injection weights, because there is no limitation with regard to dimensioning of the secondary injection unit (s), since these need not be arranged vertically.
    The first movement mechanism may, for example, comprise a guide preferably arranged on one of the platens and a suitable drive for moving the at least one secondary injection unit and the
    Have diverting device along the guide.
    The second movement mechanism may comprise, for example, a guide preferably arranged on the machine frame and a suitable drive for moving the at least one primary injection unit along the guide.
    In one embodiment of the invention it is provided that the
    Diverter is connected to or formed with the at least one secondary injection unit. There is no separate movement mechanism for the diverter required.
    / 29
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    In one embodiment of the invention it is provided that a preferably transverse to a direction of extension of the at least one primary injection unit extending displacement movement between the first and the second position is executable by the first movement mechanism. It is either preferred that
    - By the first movement mechanism a preferably transversely to an extension direction of the at least one primary injection unit extending sliding movement between the first and the second position is executable, or that
    - By the first movement mechanism, a pivoting movement between the first and the second position is executable.
    In one exemplary embodiment of the invention, it is provided that the at least one primary injection unit and / or the at least one secondary injection unit have or have at least one translating and rotationally mounted plasticizing screw. In such a case, the plasticization of plastic takes place in the at least one primary injection unit and / or the at least one secondary injection unit itself. Alternatively, at least with respect to one of the injection units, a separate treatment of the melt component could take place and be supplied in melt form to the respective injection unit ,
    In one embodiment of the invention it is provided that the at least one primary injection unit is connected or connectable to a recycling device.
    In one embodiment of the invention it is provided that the at least one primary injection unit has a preferably horizontally extending extension direction and the at least one secondary injection unit has an extension direction and the extension directions form an acute angle with one another. This results in a particularly space-saving installation situation. The space above the mold clamping plate, on the side of which the two-component plasticizing unit is located, remains free.
    In one embodiment of the invention, a bracket for supporting the at least one secondary injection unit is provided, wherein the console has a free space through which the at least one primary injection unit / 29
    83782 36 / eh extends. Thus, the at least one secondary injection unit can be arranged above the at least one primary injection unit. It is preferably provided that the console has an obliquely to a direction of extension of the at least one primary injection unit extending footprint for the at least one secondary injection unit. The first
    Movement mechanism may be formed along the footprint.
    It can be provided that a melt outlet opening of the at least one primary injection unit and / or a melt outlet opening of the at least one secondary injection unit is designed to be closable.
    In one embodiment of the invention, it is provided that one of the mold clamping plates of the shaping machine according to the invention has at least one passage opening for injecting melt to be injected through the two-component plasticizing unit into the mold cavity. It is preferably provided that those of the at least two platens, which has the passage opening, on its side facing the two-component plasticizing unit has a recess into which the at least one primary and the at least one secondary injection unit and the bypass device protrude.
    Embodiments of the invention will be discussed with reference to the figures. For the sake of clarity, not all figures in all figures are always drawn. Unless it is expressly pointed to existing differences between the embodiments, design details, which are described only with respect to one of the embodiments, of course, be provided in the other embodiments. Show it:
    1a-f shows a performance of a plastic Monosandwich injection molding with a molding machine according to the invention
    2a, b - 5a, b show various embodiments of shaping machines according to the invention with two-component plasticizing units according to the invention, in each case in a partially sectioned side view and a corresponding perspective view / 29
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    Fig
    Fig
    7a, b - 8a, b
    1 is a partially sectioned side view of another embodiment of a shaping machine according to the invention with a two-component plasticizing unit according to the invention, two embodiments according to the invention
    Shaping machines with two-component plasticizing according to the invention, each in a perspective view and an associated plan view of a partially sectioned side view of another embodiment of a molding machine according to the invention with a two-component plasticizing according to the invention
    1a-f shows a section of a shaping machine (here: plastic injection molding machine) with a two-component plasticizing unit 20, in this case especially with a plastic monosandwich plasticizing unit, with a primary injection unit 1 for injecting a first melt-shaped component (here: a first thermoplastic resin) of a molded article in a mold cavity not shown in Fig. 1 and a secondary injection unit 2 for injecting a second melt-shaped component (here: a second thermoplastic resin) of a molded part in the same mold cavity.
    Connected to the secondary injection unit 2 is a bypass device 3, by means of which the second melt-shaped component can be diverted from the secondary 2 injection unit to the primary injection unit 1. The diverting device 3 diverts the second molten component from a first direction extending in the direction of extension of the secondary injection unit 2 into a second direction running counter to the extension direction of the primary injection unit 1, wherein an angle between the first and second directions is given by the difference between the full angle of 360 ° and those angles which the extension directions of the primary and secondary injection units 1, 2 with each other. The bypass device 3 is then connected to a melt outlet opening 11 of the secondary injection unit 2 with this and can thus be moved together with this.
    / 29
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    In addition, a movement device is provided, through which the
    Diverter 3 together with the at least one secondary
    Injection unit 2 relative to a melt outlet 4 of the primary
    Injection unit 1 between a first position and a second position is movable so that in the first position, the melt outlet opening 4 can be pressed against the bypass device 3 and the melt-shaped second component from the secondary injection unit 2 via the bypass device 3 in a subsequent to the melt outlet opening 4 Receiving space 5 of the primary injection unit 1 is injectable, and in the second position the
    Melt outlet opening 4 of the primary injection unit 1 at the
    Diverter 3 is movable past to inject the second melt-shaped component located in the receiving space 5 together with a first melt-shaped component located farther away from the melt outlet opening 4 in the primary injection unit 1 in the mold cavity.
    In Fig. 1a, the secondary injection unit 2 and the diverter 3 are in the second position. In the secondary injection unit 2, the second molten component for the molding is provided.
    In Fig. 1b, the secondary injection unit 2 and the diverter 3 have been moved by a first moving mechanism of the moving device without moving the injection unit 1 from the second position to the first position, in this embodiment by a perpendicular to a direction of extension of the primary injection unit 1 extending sliding movement ,
    In Fig. 1c, the primary injection unit 1 by a second
    Moving mechanism (here a hydraulic piston-cylinder unit below the primary injection unit 1) of the moving device without moving the secondary injection unit 2 and the bypass device 3 in the second position on the bypass device 3 moves past (here: shifted) and pressed against the bypass device 3. In this state, the second molten component located in the secondary injection unit 2 can be injected into the primary injection unit 1 via a melt outlet 4 of the primary injection unit 1, and collects in a receiving space 5 adjoining the melt outlet 4 before moving farther away from the / 29
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    Melt outlet opening 4 in the primary injection unit 1 before a
    Backflow lock 23 located first melt-shaped component.
    In Fig. 1d, the injection of the second molten component into the primary injection unit 1 is completed and the second movement mechanism has moved the primary injection unit 1 away from the diverter 3.
    In Fig. 1e, the first movement mechanism has moved the secondary injection unit 2 and the diverter 3 from the first position to the second position. The primary injection unit 1 can now be moved past it by the second movement mechanism below the diverting device 3 in order to move the second molten component, which is located in its receiving space 5 in the state shown in FIG
    Melt outlet opening 4 in the primary injection unit 1 located to inject the first melt-shaped component in the mold cavity, not shown. The second melt-shaped component is first injected into the mold cavity due to their arrangement in the primary injection unit 1 and displaced by the subsequently injected first melt-shaped component and pressed against a wall of the mold cavity, so that in the finished molded part, the first melt-shaped component, a core component of the molding and the second melt-shaped component forms a skin component of the molding.
    The melt outlet 4 of the primary injection unit 1 and the
    Melt outlet opening 11 of the secondary injection unit 2 may be designed to be closable.
    2 shows a forming machine with a closing unit 19 (here designed as a horizontal closing unit with bars 18) and a two-component plasticizing unit 20. The mold clamping plates 8, 9 have mold halves 21, 22 which jointly form a mold cavity in the closed state. The formation of the closing unit 19 can be done according to the prior art, so details, such as a mechanism for moving the platen 8 relative to the platen 9 or a mechanism for closing force generation, are not shown. The invention can be used independently of the design of the closing unit 19. Preferably, however, that / 29
    83782 36 / eh
    Mold platen 9, which has at least one passage opening for the molten components to be injected, on its side facing the two-component plasticizing unit 20, a recess 10 into which the primary injection unit 1, the secondary injection unit 2 and the diverting apparatus 3 protrude.
    The primary injection unit 1 and the secondary injection unit 2 are arranged on a machine bed 12. The secondary injection unit 2 is arranged on a sloping footprint of a console 13. The first movement mechanism, not shown here, can move the secondary injection unit 2 and thus the deflection device 3 along the footprint and thus move the secondary injection unit 2 and thus the deflection device 3 back and forth between the first and the second position.
    The embodiment of Fig. 3 differs from that of Fig. 2 only in that a second primary injection unit 1 is provided, through which a third melt-shaped component can be injected into the same mold cavity as the first and the second melt-shaped component. The third melt-shaped component may be different from or equal to one of the first and second melt-shaped components.
    The embodiment of FIG. 4 differs from that of FIG. 2 only in that here a closing unit 19 is provided in the form of a vertical clamping unit.
    The embodiment of FIG. 5 differs from that of FIG. 2 only in that here two primary injection units 1 and two secondary injection units 2 are provided, which can each be coupled to one another via a separate deflection device 3.
    In the embodiment of Fig. 6, the primary injection unit 1 is supplied by a recycler 7 with the first melt-shaped component. For this purpose, plastic to be recycled is supplied via a feed hopper 14. In the recycling device from a plastic granules is prepared. Between the recycler 7 and the primary injection unit 1 (which here / 29
    83782 36 / eh
    Plasticizing screw 6 has) a sieve 15 is set. An analogous one
    Embodiment in which the secondary injection unit 2 is supplied with the second molten component by a recycler 7 is shown in FIG.
    The embodiments of FIGS. 7 and 8 illustrate that the movement of the secondary injection device 2 and the deflection device 3 between the first and the second position by the first movement device can take place either in the form of a pivoting movement (FIG. 7) or in the form of a displacement movement (FIG. Fig. 8).
    / 29
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    LIST OF REFERENCE NUMBERS
    primary injection unit secondary injection unit
    diverter
    Melt outlet of the primary injection unit
    accommodation space
    plasticizing
    Rezykliervorrichtung
    platen
    platen
    Recess in platen
    Melt outlet of the secondary injection unit
    machine bed
    Console for the secondary injection unit
    Filling funnel for recyclate
    Sieve of the recycling device
    Filling funnel of the primary injection unit
    Hopper of the secondary injection unit
    Holms of the clamping unit
    Closing unit of the molding machine
    Plasticizing unit of the molding machine
    mold
    mold
    Return valve
    Guiding the first movement mechanism
    Innsbruck, 27 June 2018
    权利要求:
    Claims (15)
    [1]
    claims:
    1. Two-component plasticizing unit (20), in particular plastic monosandwich plasticizing unit for a molding machine, with
    - At least one primary injection unit (1) for injecting a first melt-shaped component of a molded part in a mold cavity and
    - At least one secondary injection unit (2) for injecting a second melt-shaped component of a molded part in the same mold cavity, characterized in that
    - A diverter (3) is provided, through which the second melt-shaped component from the at least one secondary (2) injection unit to the at least one primary injection unit (1) is divisible
    a movement device is provided, by means of which the diversion device (3) is movable together with the at least one secondary injection unit (2) relative to a melt outlet opening (4) of the at least one primary injection unit (1) between a first position and a second position, in that in the first position the melt outlet opening (4) can be pressed against the diverting device (3) and the melt - shaped second component from the at least one secondary injection unit (2) is diverted via the diverting device (3) into the
    In the second position, the melt outlet opening (4) of the at least one primary injection unit (1) is movable past the diverting device (3) in order to allow the at least one primary injection unit (1) to flow in the receiving space (5) located second melt-shaped component together with a further away from the melt outlet opening (4) in the at least one primary injection unit (1) located to inject first molten component in a mold cavity.
    [2]
    2. Two-component plasticizing unit according to claim 1, wherein the diverting device (3) is connected to or formed with the at least one secondary injection unit (2).
    13/29
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    [3]
    3. Two-component plasticizing unit according to at least one of the preceding claims, wherein the at least one movement device has a first movement mechanism for the diverting device (3) and the at least one secondary injection unit (2), by which - preferably independent of the at least one primary Injection unit (1) - are movable between the first and the second position.
    [4]
    4. Two-component plasticizing unit according to the preceding claim, wherein by the first movement mechanism, a preferably transversely to an extension direction of the at least one primary injection unit (1) extending sliding movement between the first and the second position is executable.
    [5]
    5. Two-component plasticizing unit according to claim 3, wherein by the first movement mechanism, a pivoting movement between the first and the second position is executable.
    [6]
    6. Two-component plasticizing unit according to at least one of the preceding claims, wherein the at least one movement device has a second movement mechanism for the at least one primary injection unit (1), by which these - preferably independent of the at least one secondary injection unit (2) and the Diverting device (3) - in the second position on the bypass device (3) movable past, preferably displaceable, is.
    [7]
    7. Two-component plasticizing unit according to at least one of the preceding claims, wherein the at least one primary injection unit (1) and / or the at least one secondary injection unit (2) have at least one translationally and rotationally mounted plasticizing screw (6).
    [8]
    8. The two-component plasticizing unit according to at least one of the preceding claims, wherein the at least one primary injection unit (1) and / or the at least one secondary injection unit (2) is or are connectable to a recycler (7).
    14/29
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    [9]
    9. Two-component plasticizing unit according to at least one of the preceding claims, wherein the at least one primary injection unit (1) has a preferably horizontally extending extension direction and the at least one secondary injection unit (2) has an extension direction and the extension directions form an acute angle with each other.
    [10]
    10. Two-component plasticizing unit according to at least one of the preceding claims, wherein a console (13) for supporting the at least one secondary injection unit (2) is provided, wherein the console (13) has a free space through which the primary injection unit ( 1) extends.
    [11]
    A two-component plasticizing unit according to the preceding claim, wherein the bracket (13) has a footprint extending obliquely to an extending direction of the at least one primary injection unit (1) for the at least one secondary injection unit (2).
    [12]
    12. Forming machine, in particular plastic injection molding machine, with:
    - A closing unit (19) with at least two relatively movable mold clamping plates (8, 9) on which mold halves (21,22) are fastened, which in a closed state of the at least two
    Form platens (8, 9) together form a mold cavity
    - A two-component plasticizing unit (20) according to at least one of the preceding claims, by means of which melt-shaped components of a molded part to be molded into the mold cavity can be injected.
    [13]
    13. Forming machine according to the preceding claim, wherein one of
    Mold clamping plates (8, 9) has at least one passage opening for injecting injected by the two-component plasticizing unit (20) melt-shaped components in the mold cavity.
    [14]
    14. Forming machine according to the preceding claim, wherein those of the at least two mold clamping plates (8, 9), which has the at least one passage opening, on its side facing the two-component plasticizing (20) side a recess (10), in which the at least
    [15]
    15/29
    83782 36 / eh a primary injection unit (1), the at least one secondary injection unit (2) and the diverting device (3) protrude.
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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
    EP0692359A1|1994-07-11|1996-01-17|Ferromatik Milacron Maschinenbau GmbH|Apparatus for sandwich injection moulding|
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    AT523954A1|2020-06-25|2022-01-15|Engel Austria Gmbh|Injection unit for a molding machine and injection method|
    AT523516B1|2020-07-08|2021-09-15|Engel Austria Gmbh|Injection arrangement for a molding machine and method for operating such|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50529/2018A|AT521056B1|2018-06-27|2018-06-27|Two-component plasticizing|ATA50529/2018A| AT521056B1|2018-06-27|2018-06-27|Two-component plasticizing|
    DE102019117259.4A| DE102019117259A1|2018-06-27|2019-06-26|Two-component plasticizing|
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