DE20321036U1 - Injection unit for an injection molding machine has hollow shaft drive motors for rotational and axial drives facing each other with a spindle drive system in an internal chamber of both motors - Google Patents
Injection unit for an injection molding machine has hollow shaft drive motors for rotational and axial drives facing each other with a spindle drive system in an internal chamber of both motors Download PDFInfo
- Publication number
- DE20321036U1 DE20321036U1 DE20321036U DE20321036U DE20321036U1 DE 20321036 U1 DE20321036 U1 DE 20321036U1 DE 20321036 U DE20321036 U DE 20321036U DE 20321036 U DE20321036 U DE 20321036U DE 20321036 U1 DE20321036 U1 DE 20321036U1
- Authority
- DE
- Germany
- Prior art keywords
- drive
- rotor
- hollow shaft
- housing
- spindle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000002347 injection Methods 0.000 title claims description 18
- 239000007924 injection Substances 0.000 title claims description 18
- 238000001746 injection moulding Methods 0.000 title claims description 5
- 238000005259 measurement Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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
Description
Die Erfindung bezieht sich auf ein Einspritzaggregat für eine Spritzgießmaschine, nach dem Oberbegriff des Anspruchs 1 bzw. 6.The The invention relates to an injection unit for an injection molding machine, according to the preamble of claim 1 or 6.
Bei
dem aus der
Aufgabe der Erfindung ist es, ein Einspritzaggregat der eingangs genannten Art so auszubilden, dass auf konstruktiv einfache Weise die Bauart des Einspritzaggregats, insbesondere hinsichtlich der baulichen Abmessungen und der Anordnung des Drucksensors, wesentlich verbessert wird.task The invention is an injection unit of the aforementioned Form a way so that in a structurally simple way the type of the injection unit, in particular with regard to structural Dimensions and the arrangement of the pressure sensor, significantly improved becomes.
Diese Aufgabe wird erfindungsgemäß durch das im Anspruch 1 bzw. 6 gekennzeichnete Einspritzaggregat gelöst.These The object is achieved by the in claim 1 or 6 marked injection unit solved.
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 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 Weise wirksam eliminiert werden.According to the invention the claimed training and mutual alignment of the drive motors and the inclusion of the spindle drive in the boundaries of both rotor interiors the total length of the Injection unit, based on the effective screw stroke, considerably shortened and such a very space-saving Construction achieved. Optionally or additionally, according to the invention, the Measurement accuracy of the effective screw pressure force clearly elevated, that the pressure sensor in conjunction with the axially limited Arrangement of the rotor bearings of the rotary drive in the direction of the stroke behind its housing is positioned and accordingly measuring errors, their cause in the friction and inertia-prone Lifting movement of the rotary drive housing have 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 und in den des Drehantriebs erstreckt, während die am Drehantrieb gehäuseseitig befestigte Spindelmutter des Spindeltriebs in den Hohlwellen-Innenraum des Linearantriebs eingreift.A particularly favorable embodiment The invention consists in that the spindle shaft of the spindle drive is firmly connected to the hollow shaft rotor of the linear drive and in the return position the plasticizing screw through the hollow shaft interior of the linear drive and in the rotary drive extends, while the housing on the rotary drive attached spindle nut of the spindle drive in the hollow shaft interior of the linear drive engages.
Ein weiterer, besonders bevorzugter Aspekt der Erfindung bezieht sich auf die Gestaltung der Rotor-Lagerstellen. Während nämlich für eine Außenlagerung der Hohlwellenrotoren große und 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 Hohlwellen-Innenraum 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 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.One Another, particularly preferred aspect of the invention relates on the design of the rotor bearings. Namely, for external storage of the hollow shaft rotors size and accordingly costly precision bearings are needed the required bearing diameter is advantageously thereby essential reduced, that for the rotatable mounting of the hollow shaft rotor of Rotary drive a housing fixed, in the hollow shaft interior engaging and the rotor with the interposition of the rotor bearings on its inner lateral surface supporting carrying sleeve is provided, in which the rotating with the rotor of the linear drive Transmission element of the spindle drive, so the spindle shaft or the Spindle nut, during the return stroke of the Rotary drive increasingly insertable is, and / or that the hollow shaft rotor of the linear drive also for reasons a reduction of the bearing size expediently over a from the closed end of the rotor axially projecting, central journal and between this and the motor housing arranged bearings is cantilevered on one side.
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.A particularly einbaugünstige Arrangement of the rotary encoder required for measuring the rotational angle of the rotary drive finally results from the fact that this between the locked rotor end and the fixed to the housing carrying sleeve the rotary drive is positioned.
Die Erfindung wird nunmehr anhand eines Ausführungsbeispiels in Verbindung mit der Zeichnung näher erläutert. Diese zeigt einen Längsschnitt eines Einspritzaggregats nach der Erfindung in stark schematisierter Darstellung.The Invention will now be based on an embodiment in conjunction closer to the drawing explained. This shows a longitudinal section of a Injection unit according to the invention in a highly schematic representation.
Das
in der Zeichnung dargestellte Einspritzaggregat einer ansonsten
nicht näher
gezeigten Spritzgießmaschine
enthält
als Hauptbestandteile eine in einem Plastifizierzylinder
Beide
Antriebe
Der
Drehwinkel des Rotors
Zur
Umsetzung der Drehbewegung des Rotors
Die
Schubkraft des Spindeltriebs
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20321036U DE20321036U1 (en) | 2003-02-05 | 2003-02-05 | Injection unit for an injection molding machine has hollow shaft drive motors for rotational and axial drives facing each other with a spindle drive system in an internal chamber of both motors |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE20321036U DE20321036U1 (en) | 2003-02-05 | 2003-02-05 | Injection unit for an injection molding machine has hollow shaft drive motors for rotational and axial drives facing each other with a spindle drive system in an internal chamber of both motors |
| DE2003104577 DE10304577A1 (en) | 2003-02-05 | 2003-02-05 | Injection unit for an injection molding machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE20321036U1 true DE20321036U1 (en) | 2006-03-16 |
Family
ID=36120959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE20321036U Expired - Lifetime DE20321036U1 (en) | 2003-02-05 | 2003-02-05 | Injection unit for an injection molding machine has hollow shaft drive motors for rotational and axial drives facing each other with a spindle drive system in an internal chamber of both motors |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE20321036U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3135455A1 (en) * | 2015-08-31 | 2017-03-01 | Sumitomo Heavy Industries, Ltd. | Injection unit |
-
2003
- 2003-02-05 DE DE20321036U patent/DE20321036U1/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3135455A1 (en) * | 2015-08-31 | 2017-03-01 | Sumitomo Heavy Industries, Ltd. | Injection unit |
| JP2017047576A (en) * | 2015-08-31 | 2017-03-09 | 住友重機械工業株式会社 | Injection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R207 | Utility model specification |
Effective date: 20060420 |
|
| R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 20060407 |
|
| R081 | Change of applicant/patentee |
Owner name: SUMITOMO (SHI) DEMAG PLASTICS MACHINERY GMBH, DE Free format text: FORMER OWNER: DEMAG ERGOTECH GMBH, 90571 SCHWAIG, DE Effective date: 20081208 |
|
| R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20090428 |
|
| R158 | Lapse of ip right after 8 years |
Effective date: 20110901 |