AT8284U1 - DRIVE UNIT WITH HOISTWAVE ENGINES FOR THE INJECTION UNIT OF AN INJECTION MOLDING MACHINE - Google Patents
DRIVE UNIT WITH HOISTWAVE ENGINES FOR THE INJECTION UNIT OF AN INJECTION MOLDING MACHINE Download PDFInfo
- Publication number
- AT8284U1 AT8284U1 AT0049005U AT4902005U AT8284U1 AT 8284 U1 AT8284 U1 AT 8284U1 AT 0049005 U AT0049005 U AT 0049005U AT 4902005 U AT4902005 U AT 4902005U AT 8284 U1 AT8284 U1 AT 8284U1
- Authority
- AT
- Austria
- Prior art keywords
- drive
- rotor
- rotary drive
- hollow shaft
- housing
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
- B29C2045/5024—Drive means therefor screws rotated by the coaxial rotor of an electric motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
- B29C2045/5028—Drive means therefor screws axially driven by the coaxial rotor of an electric motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
- B29C2045/5032—Drive means therefor using means for detecting injection or back pressures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
- B29C45/50—Axially movable screw
- B29C45/5008—Drive means therefor
- B29C2045/504—Drive means therefor electric motors for rotary and axial movement of the screw being coaxial with the screw
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Die Erfindung betrifft ein Einspritzaggregat für eine Spritzgießmaschine, mit einem elektromotorischen, die Plastifizierschnecke (2) in Drehrichtung antreibenden und gemeinsam mit dieser hubbeweglich angeordneten Drehantrieb (3) sowie einem elektromechanischen Linearantrieb (4) einschließlich eines Hohlwellenmotors und eines diesem nachgeschalteten Spindeltriebs (20) zum Hubantrieb der Plastifizierschnecke und des Drehantriebs, wobei die Plastifizierschnecke, der Drehantrieb und der Linearantrieb koaxial zueinander angeordnet sind. Um vorteilhafte Konstruktionsverhältnisse zu schaffen, wird vorgeschlagen, daß beide Antriebsmotoren als mit ihren offenen Enden einander zugekehrte Hohlwellenmotoren (3, 8 u. 4, 9) ausgebildet sind und der Spindeltrieb (20) im gemeinsamen Rohlwellen-Innenraum beider Hohlwellenmotoren untergebracht ist.The invention relates to an injection unit for an injection molding machine, with an electromotive, the plasticizing screw (2) driving in rotation and together with this hubbeweglich arranged rotary drive (3) and an electromechanical linear drive (4) including a hollow shaft motor and a spindle drive connected downstream of this (20) Linear actuator of the plasticizing screw and the rotary drive, wherein the plasticizing screw, the rotary drive and the linear drive are arranged coaxially with each other. In order to provide advantageous design conditions, it is proposed that both drive motors are designed as hollow shaft motors facing each other with their open ends (3, 8 and 4, 9) and the spindle drive (20) is accommodated in the common hollow shaft interior of both hollow shaft motors.
Description
2 AT 008 284 U12 AT 008 284 U1
Die Erfindung bezieht sich auf ein Einspritzaggregat für eine Spritzgießmaschine, nach dem Oberbegriff des Patentanspruchs 1 bzw. 6.The invention relates to an injection unit for an injection molding machine, according to the preamble of patent claim 1 and 6, respectively.
Bei dem aus der US 6 309 203 B1 bekannten Einspritzaggregat dieser Art ist die Spindelmutter 5 des Spindeltriebs fest mit dem Hohlwellenrotor des Linearantriebs verbunden, während die Spindelwelle unter Zwischenschaltung eines die Einspritzkraft messenden Drucksensors an dem auf Führungsholmen hubbeweglich und drehfest gelagerten Gehäuse des Drehantriebs befestigt ist. Bei diesem bekannten Einspritzaggregat ergibt sich aus der koaxialen Aneinanderreihung der Einzelkomponenten eine sehr große Gesamtbaulänge, und ferner wirken die bei io der Hubbewegung unvermeidbar auftretenden Reibungs- und Trägheitskräfte des Drehantriebs verfälschend auf das Messergebnis des Drucksensors.In the injection unit of this type known from US Pat. No. 6,309,203 B1, the spindle nut 5 of the spindle drive is firmly connected to the hollow shaft rotor of the linear drive, while the spindle shaft is fastened to the housing of the rotary drive mounted on guide rails so as to be liftable and non-rotatably mounted with the interposition of a pressure sensor measuring the injection force , In this known injection unit results from the coaxial juxtaposition of the individual components of a very large overall length, and also act inevitably in io the stroke movement occurring friction and inertia forces of the rotary drive falsifying the measurement result of the pressure sensor.
Aufgabe der Erfindung ist es, ein Einspritzaggregat der eingangs genannten Art so auszubilden, daß auf konstruktiv einfache Weise die Bauart des Einspritzaggregats, insbesondere hinsicht-15 lieh der baulichen Abmessungen und der Anordnung des Drucksensors, wesentlich verbessert wird.The object of the invention is to provide an injection unit of the type mentioned in such a way that in a structurally simple manner, the design of the injection unit, in particular respect 15 lent the structural dimensions and the arrangement of the pressure sensor is substantially improved.
Diese Aufgabe wird erfindungsgemäß durch das im Patentanspruch 1 bzw. 6 gekennzeichnete Einspritzaggregat gelöst. 20This object is achieved by the characterized in claim 1 and 6 injection unit. 20
Erfindungsgemäß wird durch die beanspruchte Ausbildung und gegenseitige Ausrichtung der Antriebsmotoren und die Einbeziehung des Spindeltriebs in die Grenzen beider Rotor-Innenräume die Gesamtlänge des Einspritzaggregats, bezogen auf den wirksamen Schneckenhub, erheblich verkürzt und so eine äußerst platzsparende Bauweise erreicht. Wahlweise oder 25 zusätzlich wird erfindungsgemäß außerdem die Meßgenauigkeit der effektiven Schneckendruckkraft dadurch deutlich erhöht, daß der Drucksensor in Verbindung mit der axial begrenzt beweglichen Anordnung der Rotorlager des Drehantriebs in Hubkraftrichtung hinter dessen Gehäuse positioniert ist und demgemäß Meßfehler, die ihre Ursache in der reibungs- und trägheitsbehafteten Hubbewegung des Drehantriebsgehäuses haben, auf konstruktiv einfache 30 Weise wirksam eliminiert werden.According to the invention, the overall length of the injection unit, based on the effective screw stroke, considerably shortened by the claimed training and mutual alignment of the drive motors and the inclusion of the spindle drive in the limits of both rotor interiors and thus achieves a very space-saving design. Optionally, or 25 addition, the measurement accuracy of the effective worm pressure force is also significantly increased by the fact that the pressure sensor is positioned in conjunction with the axially movable arrangement of the rotor bearing of the rotary drive in the lifting force behind the housing and accordingly measurement errors, the cause of the friction and inertial lifting movement of the rotary drive housing have to be effectively eliminated in a structurally simple manner.
Eine besonders baugünstige Ausführungsform der Erfindung besteht darin, daß die Spindelwelle des Spindeltriebs fest mit dem Hohlwellenrotor des Linearantriebs verbunden ist und sich in der Rückhublage der Plastifizierschnecke durch den Hohlwellen-Innenraum des Linearantriebs 35 und in den des Drehantriebs erstreckt, während die am Drehantrieb gehäuseseitig befestigte Spindelmutter des Spindeltriebs in den Hohlwellen-Innenraum des Linearantriebs eingreift.A particularly bauünstige embodiment of the invention is that the spindle shaft of the spindle drive is fixedly connected to the hollow shaft rotor of the linear drive and extends in the return position of the plasticizing screw through the hollow shaft interior of the linear drive 35 and in the rotary drive, while the housing-mounted on the rotary drive Spindle nut of the spindle drive engages in the hollow shaft interior of the linear drive.
Ein weiterer, besonders bevorzugter Aspekt der Erfindung bezieht sich auf die Gestaltung der Rotor-Lagerstellen. Während nämlich für eine Außenlagerung der Hohlwellenrotoren große und 40 dementsprechend kostspielige Präzisionslager benötigt werden, wird der erforderliche Lagerdurchmesser zweckmäßigerweise dadurch wesentlich verkleinert, daß zur drehbaren Lagerung des Hohlwellenrotors des Drehantriebs eine gehäusefeste, in den Hohlwelleninnenraum eingreifende und den Rotor unter Zwischenschaltung der Rotorlager an seiner inneren Mantelfläche abstützende Traghülse vorgesehen ist, in die das mit dem Rotor des Linearantriebs umlaufende 45 Getriebeelement des Spindeltriebs, also die Spindelwelle oder die Spindelmutter, beim Rückhub des Drehantriebs zunehmend einführbar ist, und/oder daß der Hohlwellenrotor des Linearantriebs ebenfalls aus Gründen einer Reduzierung der Lagergröße zweckmäßigerweise über einen vom verschlossenen Rotorende axial abstehenden, zentralen Lagerzapfen und zwischen diesem und dem Motorgehäuse angeordnete Lagerstellen einseitig fliegend gelagert ist. 50Another, particularly preferred aspect of the invention relates to the design of the rotor bearings. While in fact for an external storage of the hollow shaft rotors large and 40 correspondingly expensive precision bearings are required, the required bearing diameter is advantageously substantially reduced by the fact that for rotatably supporting the hollow shaft rotor of the rotary drive a housing-fixed, engaging in the hollow shaft interior and the rotor with the interposition of the rotor bearings on its inner The lateral surface supporting support sleeve is provided, in which the rotating with the rotor of the linear drive 45 gear element of the spindle drive, so the spindle shaft or the spindle nut, is increasingly introduced during the return stroke of the rotary drive, and / or that the hollow shaft rotor of the linear drive also for reasons of reducing the bearing size expediently mounted on one side flying over an axially projecting from the closed end of the rotor, central bearing journal and arranged between this and the motor housing bearing points. 50
Eine besonders einbaugünstige Anordnung des zur Messung des Drehwinkels des Drehantriebs benötigten Drehgebers ergibt sich schließlich daraus, daß dieser zwischen dem verschlossenen Rotorende und der gehäusefesten Traghülse des Drehantriebs positioniert ist. 55 Die Erfindung wird nunmehr anhand eines Ausführungsbeispiels in Verbindung mit der Zeich-A particularly einbaugünstige arrangement of the required for measuring the rotational angle of the rotary drive encoder finally results from the fact that this is positioned between the closed rotor end and the housing-fixed support sleeve of the rotary drive. The invention will now be described by way of example with reference to the drawing in which
Claims (6)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003104577 DE10304577A1 (en) | 2003-02-05 | 2003-02-05 | Injection unit for an injection molding machine |
Publications (1)
Publication Number | Publication Date |
---|---|
AT8284U1 true AT8284U1 (en) | 2006-05-15 |
Family
ID=32841595
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT0049005U AT8284U1 (en) | 2003-02-05 | 2005-07-19 | DRIVE UNIT WITH HOISTWAVE ENGINES FOR THE INJECTION UNIT OF AN INJECTION MOLDING MACHINE |
Country Status (3)
Country | Link |
---|---|
AT (1) | AT8284U1 (en) |
DE (1) | DE10304577A1 (en) |
WO (1) | WO2004069518A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114728454A (en) * | 2019-09-26 | 2022-07-08 | 尼根机械有限公司 | Injection device and related method |
JP7500469B2 (en) * | 2021-02-26 | 2024-06-17 | 住友重機械工業株式会社 | Injection molding machine |
JP7532287B2 (en) * | 2021-02-26 | 2024-08-13 | 住友重機械工業株式会社 | Injection Molding Machine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61140363A (en) * | 1984-12-13 | 1986-06-27 | Toshiba Mach Co Ltd | Motor-driven injection molding machine |
JPH0839631A (en) * | 1994-07-29 | 1996-02-13 | Sumitomo Heavy Ind Ltd | Injection device of electromotive injection molding machine |
JP3140997B2 (en) * | 1998-03-27 | 2001-03-05 | 住友重機械工業株式会社 | Injection device of electric injection molding machine |
JP3313666B2 (en) * | 1999-06-14 | 2002-08-12 | 住友重機械工業株式会社 | Method and apparatus for detecting back pressure of injection molding machine |
JP2001088180A (en) * | 1999-09-22 | 2001-04-03 | Nissei Plastics Ind Co | Injection molding machine |
DE10028066C1 (en) * | 2000-06-07 | 2001-12-20 | Krauss Maffei Kunststofftech | Injection unit for an injection molding machine |
-
2003
- 2003-02-05 DE DE2003104577 patent/DE10304577A1/en not_active Withdrawn
-
2004
- 2004-01-28 WO PCT/EP2004/000715 patent/WO2004069518A1/en active Application Filing
-
2005
- 2005-07-19 AT AT0049005U patent/AT8284U1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE10304577A1 (en) | 2004-10-21 |
WO2004069518A1 (en) | 2004-08-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TC9K | Change of company |
Owner name: SUMITOMO (SHI) DEMAG PLASTICS MACHINERY GMBH, D-90 |
|
MM9K | Lapse due to non-payment of renewal fee |