US20040047944A1 - Closing device in an injection moulding machine for synthetic materials - Google Patents

Closing device in an injection moulding machine for synthetic materials Download PDF

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Publication number
US20040047944A1
US20040047944A1 US10/470,832 US47083203A US2004047944A1 US 20040047944 A1 US20040047944 A1 US 20040047944A1 US 47083203 A US47083203 A US 47083203A US 2004047944 A1 US2004047944 A1 US 2004047944A1
Authority
US
United States
Prior art keywords
hollow
shaft motor
clamping device
platen
end platen
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.)
Abandoned
Application number
US10/470,832
Other languages
English (en)
Inventor
Gunther Fischbach
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mannesmann Plastics Machinery GmbH
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27214299&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20040047944(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE2001107502 external-priority patent/DE10107502A1/de
Priority claimed from DE2001130669 external-priority patent/DE10130669A1/de
Priority claimed from DE2001152688 external-priority patent/DE10152688A1/de
Application filed by Individual filed Critical Individual
Assigned to MANNESMANN PLASTICS MACHINERY AG reassignment MANNESMANN PLASTICS MACHINERY AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GUNTHER FISCHBACH
Publication of US20040047944A1 publication Critical patent/US20040047944A1/en
Abandoned legal-status Critical Current

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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
    • B29C45/64—Mould opening, closing or clamping devices
    • B29C45/66—Mould opening, closing or clamping devices mechanical
    • B29C45/661—Mould opening, closing or clamping devices mechanical using a toggle mechanism for mould clamping
    • 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
    • B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
    • B29C2045/1792—Machine parts driven by an electric motor, e.g. electric servomotor
    • B29C2045/1794—Machine parts driven by an electric motor, e.g. electric servomotor by a rotor or directly coupled electric motor, e.g. using a tubular shaft motor

Definitions

  • EP 0658 136 B1 discloses a clamping unit for molding tools of injection molding machines, including a clamping system in the form of a toggle mechanism, disposed between the moving platen and an end platen, for displacing the moving platen.
  • a clamping system in the form of a toggle mechanism, disposed between the moving platen and an end platen, for displacing the moving platen.
  • Several so-called five-point toggle lever systems are coupled with a common crosshead.
  • a threaded spindle is connected in fixed rotative engagement upon the crosshead and engages a nut which is immobile in axial direction but received in the end platen for rotation.
  • the rotary drive is implemented by coupling the nut to a hollow shaft of an electric motor which is flange-mounted to the outside of the end platen.
  • the invention is based on the object to provide a clamping device of this type, which is of significantly shorter construction while still allowing a cost-efficient construction.
  • the recess of the end platen is configured as opening through the end platen. In this way, the full thickness of the end platen can be saved as axial structural length of the clamping device.
  • the hollow-shaft motor extends hereby through the end platen.
  • the full thickness of the end platen can be exploited as saving of axial structural length of the clamping device.
  • the end platen can be configured in a geometric shape that deviates from the pure plate-shape.
  • the end platen has preferably a back wall with a recess in which the hollow-shaft motor can be received. In this way, the full thickness of the end platen can again be saved when the motor is longer than the thickness of the end platen.
  • the greatest outer diameter of the hollow-shaft motor is preferably smaller than the smallest inner diameter of the opening through the end platen. This ensures a complete fit of the hollow-shaft motor in the opening through the end platen and a penetration of the hollow-shaft motor through the end platen.
  • the end platen includes a preferably cylindrical recess in which the hollow-shaft motor can move into and/or move through.
  • the structural length of the injection molding machine is reduced in any event by the thickness of the end platen.
  • the spindle is arranged in a rotationally fixed manner.
  • the spindle end, facing the moving platen, is hereby in engagement with the rotor of the hollow-shaft motor, advantageously via a spindle nut, and the stator of the hollow-shaft motor is connected to the toggle mechanism.
  • the motor runs, it moves axially and operates the toggle mechanism.
  • the spindle is stationary and barely projects beyond the outer end of the end platen. This means that the structural length of the injection molding machine is essentially bounded by the end platen.
  • the quality of control is significantly improved compared to a belt drive in which a belt acts as elastic element.
  • a belt acts as elastic element.
  • the drive system is faster because, despite higher mass inertia, the comparably smaller rotation speed enables to reach the target speed faster.
  • the spindle can be guided through the end platen and secured in a rotationally fixed manner in an anchor plate.
  • the spindle is arranged in a rotationally fixed manner with the rotor of the hollow-shaft motor and meshes with a spindle nut which is connected in a rotationally fixed manner with the end platen.
  • the stator of the hollow-shaft motor is connected with the toggle mechanism.
  • the advantage in relation to the first preferred embodiment of the invention resides, however, in the fact that the hollow shaft can be directly connected with the spindle.
  • the spindle nut connected to the hollow shaft and engaging the spindle, can be omitted.
  • this spindle nut has a significant moment of inertia, and thus constitutes a higher dynamic load in comparison to a rotatable spindle.
  • the decrease of the dynamic load in the embodiment of the invention with rotatable spindle enables a quicker movement of the clamping device.
  • the spindle nut which is connected in this embodiment in a rotationally fixed manner with the end platen, does not pose great demands as far as balancing is concerned. When especially high-quality injection molding machines are involved, in which the demand of space is secondary while very high dynamics should be realized, this alternative embodiment of the invention is especially advantageous.
  • the hollow-shaft motor is either flange-mounted directly onto the crosshead or integrated therein, for example, by providing the crosshead with a recess for receiving the hollow-shaft motor.
  • the stator may also be coupled directly to the toggle mechanism via suitable connecting elements.
  • the stator of the hollow-shaft motor is connected in a rotationally fixed manner with the end platen.
  • the hollow-shaft motor is hereby preferably installed in the recess of the end platen.
  • the spindle is connected in a rotationally fixed manner with the rotor of the hollow-shaft motor.
  • the arrangement has the advantage of a very small mass moment of inertia and is therefore superbly suited for a quick start-up.
  • Engaging the spindle is a spindle nut which is connected to the toggle mechanism preferably via a crosshead. The rotating spindle moves the spindle nut axially and operates hereby the toggle mechanism.
  • the stator of the hollow-shaft motor is stationary and projects barely beyond the outer end of the end platen. This means that the structural length of the injection molding machine is bounded essentially by the end platen.
  • the spindle nut is fixedly connected with the rotor of the hollow-shaft motor.
  • This is preferably implemented in the embodiments of the clamping device with axially movable hollow-shaft motor which is connected with the toggle mechanism.
  • This embodiment has the advantage of a particularly short axial structural length of the clamping device.
  • the spindle nut can move into the interior space of the rotor of the hollow-shaft motor.
  • This technique finds preferably application in the configuration of the clamping device in which the stator of the hollow-shaft motor is connected in a rotationally fixed manner with the end platen and the spindle nut is connected in a rotationally fixed manner with the toggle mechanism.
  • the spindle is here connected in a rotationally fixed manner with the rotor of the hollow-shaft motor.
  • This arrangement has the advantage of a very slight mass moment of inertia as the spindle nut does not rotate, and is therefore superbly suitable for a quick start-up.
  • the rotating spindle moves the spindle nut axially and operates thereby the toggle mechanism.
  • the clamping device is completely opened, i.e. the toggle levers are drawn completely in the direction of the end platen, the spindle nut plunges into the hollow-shaft motor.
  • the entire structural length of the clamping device according to the invention is shortened in this embodiment by the axial depth of penetration in comparison to those of the prior art.
  • the configurations of the general basic inventive ides to arrange as many components as possible within one another so that their individual axial structural lengths do not add up, are combined.
  • a clamping device is implemented in which the spindle nut can be received in the inner dimensions of the rotor of the hollow-shaft motor, and the hollow-shaft motor can be received in a recess of the end platen.
  • the spindle nut, the hollow-shaft motor and the end platen can nest within one another, when the clamping device is open.
  • FIG. 1 shows a cross section of a clamping device according to the invention
  • FIG. 2 shows a variation of the clamping device according to the invention of FIG. 1 with rotatable spindle
  • FIG. 3 shows a variation of the clamping device according to the invention of FIG. 2 with rotatable spindle in which the hollow-shaft motor is received in a cylindrical recess of the end platen.
  • FIG. 1 An example of the invention is illustrated in the attached FIG. 1.
  • a fixed platen 11 Arranged on a machine bed 16 is a fixed platen 11 , whereby a movable platen 12 is able to move axially relative to the fixed platen by a toggle mechanism 13 .
  • the fixed platen 11 is connected via the machine bed 16 with an end platen 19 .
  • a spindle 21 is guided with its end distal to the moving platen 12 through the end platen 19 and is arranged in a rotationally fixed manner in an anchor plate 3 .
  • a hollow-shaft motor 7 Arranged on the other end of the spindle 21 is a hollow-shaft motor 7 which is axially movable on guide bars which are arranged on both sides of the spindle 21 and fixed in the end platen 19 so that they are invisible in FIG. 1.
  • a spindle nut 5 is coupled with the hollow shaft or the rotor 6 of the hollow-shaft motor 7 and is in engagement with the spindle 21 .
  • the stator 4 of the hollow-shaft motor 7 is flange-mounted to the toggle mechanism 13 . In this way, the functions of the crosshead and of the drive motor are united.
  • FIG. 2 shows an alternative embodiment of the invention in which the spindle 21 is connected in a rotationally fixed manner with the rotor 6 and meshes with a nut 22 which is connected in a rotationally fixed manner to the end platen 19 .
  • the stator 4 of the hollow-shaft motor 7 is connected to the toggle mechanism 13 .
  • the spindle 21 and thus the hollow-shaft motor 7 moves axially as the rotor rotates.
  • the clamping device is opened and closed, respectively, via the toggle mechanism 13 . When the clamping device opens, whereby the hollow-shaft motor 7 moves in the direction of the end platen 19 , the spindle 21 projects beyond the end platen 19 .
  • FIG. 3 shows a further variation of the clamping device according to the invention.
  • the hollow-shaft motor 7 is hereby received in a recess of the end platen 19 .
  • the stator 4 of the hollow-shaft motor 7 is hereby connected in a rotationally fixed manner with the end platen 19 .
  • the rotor 6 of the hollow-shaft motor 7 is connected in a rotationally fixed manner with the spindle 21 .
  • the spindle 21 meshes with a spindle nut 23 which is connected in a rotationally fixed manner with the toggle mechanism 13 .
  • the spindle nut 23 moves in closing or opening direction of the clamping device.
  • the clamping device is opened by fully moving the spindle nut 23 back in the direction of the hollow-shaft motor 7 . Finally, the spindle nut 23 plunges into the hollow-shaft motor 7 .
  • the interior space of the rotor 6 of the hollow-shaft motor 7 is so configured that the spindle nut 23 can move into it. This arrangement has the advantage of a very slight mass moment of inertia as the spindle 23 does not rotate, and is therefore superbly suitable for a quick start-up.
  • the clamping device is open, the spindle nut 23 , the hollow-shaft motor 7 and the end platen 19 are nested within one another.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
US10/470,832 2001-02-15 2002-02-15 Closing device in an injection moulding machine for synthetic materials Abandoned US20040047944A1 (en)

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE2001107502 DE10107502A1 (de) 2001-02-15 2001-02-15 Schließeinrichtung in einer Spritzgießmaschine für Kunststoff
DE10107502.2 2001-02-15
DE2001130669 DE10130669A1 (de) 2001-06-28 2001-06-28 Schließeinrichtung in einer Spritzgießmaschine für Kunststoffe
DE10130669.5 2001-06-28
DE2001152688 DE10152688A1 (de) 2001-10-19 2001-10-19 Schließeinrichtung in einer Spritzgießmaschine für Kunststoffe
DE10152688.1 2001-10-19
PCT/EP2002/001618 WO2002064348A1 (de) 2001-02-15 2002-02-15 Schliesseinrichtung in einer spritzgiessmaschine für kunststoffe

Publications (1)

Publication Number Publication Date
US20040047944A1 true US20040047944A1 (en) 2004-03-11

Family

ID=27214299

Family Applications (3)

Application Number Title Priority Date Filing Date
US10/470,833 Abandoned US20040052893A1 (en) 2001-02-15 2002-02-15 Closing device in an injection moulding machine for synthetic materials
US10/470,834 Expired - Fee Related US6948925B2 (en) 2001-02-15 2002-02-15 Closing device in an injection moulding machine for plastics
US10/470,832 Abandoned US20040047944A1 (en) 2001-02-15 2002-02-15 Closing device in an injection moulding machine for synthetic materials

Family Applications Before (2)

Application Number Title Priority Date Filing Date
US10/470,833 Abandoned US20040052893A1 (en) 2001-02-15 2002-02-15 Closing device in an injection moulding machine for synthetic materials
US10/470,834 Expired - Fee Related US6948925B2 (en) 2001-02-15 2002-02-15 Closing device in an injection moulding machine for plastics

Country Status (5)

Country Link
US (3) US20040052893A1 (de)
EP (3) EP1361945A1 (de)
AT (2) ATE333975T1 (de)
DE (2) DE50207637D1 (de)
WO (3) WO2002064348A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009071002A1 (fr) * 2007-12-07 2009-06-11 Lu, Hsaio-Ting Ensemble d'assemblage de moule électrique
US10052802B2 (en) * 2015-10-20 2018-08-21 Hwa Chin Machinery Factory Co., Ltd. Electrical mold clamping apparatus of plastic injection molding machines

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040052893A1 (en) * 2001-02-15 2004-03-18 Gunther Fischbach Closing device in an injection moulding machine for synthetic materials
DE102004053855A1 (de) * 2004-11-04 2006-05-11 Demag Ergotech Gmbh Spritzgießmaschine mit mindestens einem Direktantrieb
JP5276953B2 (ja) * 2008-11-06 2013-08-28 東芝機械株式会社 型締装置及び射出成形機
TWI382913B (zh) * 2010-09-01 2013-01-21 Long Iong Wu 十連桿型雙肘節鎖模機構
DE102013114693A1 (de) * 2013-12-20 2015-06-25 Fette Engineering GmbH Stopfstempelstation und Verfahren zum Füllen von Kapseln in einer Stopfstempelstation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5511963A (en) * 1993-04-24 1996-04-30 Hehl; Karl Mold closing unit for use in an injection molding machine for processing synthetic materials
US5585126A (en) * 1992-08-25 1996-12-17 Battenfeld Kunststoffmaschinen Ges.M.B.H. Closing unit for form tools of an injection molding machine
US5804224A (en) * 1994-12-28 1998-09-08 Fanuc Ltd Driving apparatus for electrically-operated injection molding machine
US6413453B1 (en) * 1998-06-18 2002-07-02 Sumitomo Heavy Industries, Ltd. Motor-driven mold clamping device and mold clamping method
US6682334B2 (en) * 1999-12-27 2004-01-27 Mannesmann Plastics Machinery Gmbh Closing unit for use in an injection molding machine for processing plastic material
US6948925B2 (en) * 2001-02-15 2005-09-27 Mannesmann Plastics Machinery Gmbh Closing device in an injection moulding machine for plastics

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61140363A (ja) * 1984-12-13 1986-06-27 Toshiba Mach Co Ltd 電動機駆動射出成形機
EP0620095B1 (de) * 1993-03-20 1999-01-07 Karl Hehl Spritzgiessmaschine
AT403136B (de) * 1994-02-24 1997-11-25 Engel Gmbh Maschbau Vorrichtung zum schliessen von formen einer spritzgiessmaschine
JP2866314B2 (ja) * 1994-12-21 1999-03-08 住友重機械工業株式会社 型締装置
DE19831482C1 (de) * 1998-07-14 2000-01-20 Karl Hehl Spritzgießeinheit für eine Spritzgießmaschine
DE19847298C2 (de) * 1998-10-14 2000-11-02 Karl Hehl Spritzgießmaschine mit einem mehrere Antriebsgruppen umfassenden modularen Aufbau

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5585126A (en) * 1992-08-25 1996-12-17 Battenfeld Kunststoffmaschinen Ges.M.B.H. Closing unit for form tools of an injection molding machine
US5511963A (en) * 1993-04-24 1996-04-30 Hehl; Karl Mold closing unit for use in an injection molding machine for processing synthetic materials
US5804224A (en) * 1994-12-28 1998-09-08 Fanuc Ltd Driving apparatus for electrically-operated injection molding machine
US6413453B1 (en) * 1998-06-18 2002-07-02 Sumitomo Heavy Industries, Ltd. Motor-driven mold clamping device and mold clamping method
US6682334B2 (en) * 1999-12-27 2004-01-27 Mannesmann Plastics Machinery Gmbh Closing unit for use in an injection molding machine for processing plastic material
US6948925B2 (en) * 2001-02-15 2005-09-27 Mannesmann Plastics Machinery Gmbh Closing device in an injection moulding machine for plastics

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009071002A1 (fr) * 2007-12-07 2009-06-11 Lu, Hsaio-Ting Ensemble d'assemblage de moule électrique
US10052802B2 (en) * 2015-10-20 2018-08-21 Hwa Chin Machinery Factory Co., Ltd. Electrical mold clamping apparatus of plastic injection molding machines

Also Published As

Publication number Publication date
EP1361945A1 (de) 2003-11-19
DE50201729D1 (de) 2005-01-13
US20040052893A1 (en) 2004-03-18
DE50207637D1 (de) 2006-09-07
US20040062831A1 (en) 2004-04-01
EP1361947B1 (de) 2004-12-08
EP1361947A1 (de) 2003-11-19
US6948925B2 (en) 2005-09-27
WO2002064346A1 (de) 2002-08-22
ATE284300T1 (de) 2004-12-15
ATE333975T1 (de) 2006-08-15
WO2002064348A1 (de) 2002-08-22
WO2002064347A1 (de) 2002-08-22
EP1361946A1 (de) 2003-11-19
EP1361946B1 (de) 2006-07-26

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MANNESMANN PLASTICS MACHINERY AG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:GUNTHER FISCHBACH;REEL/FRAME:014686/0125

Effective date: 20030728

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION