WO2013097913A1 - Roue dentée en matière plastique à coeur expansé et procédé correspondant - Google Patents

Roue dentée en matière plastique à coeur expansé et procédé correspondant Download PDF

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Publication number
WO2013097913A1
WO2013097913A1 PCT/EP2012/004589 EP2012004589W WO2013097913A1 WO 2013097913 A1 WO2013097913 A1 WO 2013097913A1 EP 2012004589 W EP2012004589 W EP 2012004589W WO 2013097913 A1 WO2013097913 A1 WO 2013097913A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
plastic
core
wall
gear according
Prior art date
Application number
PCT/EP2012/004589
Other languages
German (de)
English (en)
Inventor
Michael Kastrup
Original Assignee
Gm Tec Industries Holding Gmbh
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
Application filed by Gm Tec Industries Holding Gmbh filed Critical Gm Tec Industries Holding Gmbh
Publication of WO2013097913A1 publication Critical patent/WO2013097913A1/fr

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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0461—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by having different chemical compositions in different places, e.g. having different concentrations of foaming agent, feeding one composition after the other
    • 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
    • B29C45/16—Making multilayered or multicoloured articles
    • B29C45/1642—Making multilayered or multicoloured articles having a "sandwich" structure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2015/00—Gear wheels or similar articles with grooves or projections, e.g. control knobs
    • B29L2015/003—Gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H55/00—Elements with teeth or friction surfaces for conveying motion; Worms, pulleys or sheaves for gearing mechanisms
    • F16H55/02—Toothed members; Worms
    • F16H55/06—Use of materials; Use of treatments of toothed members or worms to affect their intrinsic material properties
    • F16H2055/065—Moulded gears, e.g. inserts therefor

Definitions

  • Plastic gear with foamed core and a method to do so
  • plastic gears It is known to use plastic gears in various applications of transmission technology in powertrains and power trains.
  • the plastic gears used are generally less capable of transmitting power than metal gears. It will be
  • Tooth contours of the gears are machined from semi-finished, z. B. by milling.
  • the molds used in casting processes generally have the final tooth contour, so that the teeth are not further processed.
  • the document DE 3414842 describes a gear made of a plastic, which has radial spokes, which are connected at their outer ends by a ring with each other, around whose circumference the sprocket extends. In both end faces of the ring in each case an annular groove is embedded, which separates the ring over a certain part of its height from the sprocket.
  • the publication DE 10 2007 063 422 describes a plastic gear wheel, wherein here the peripheral portion of the gear including a tooth portion consists of plastic material.
  • the inner peripheral member of the gear is provided with a ring or disc shape on the inner peripheral side of the peripheral portion of the gear, wherein the peripheral portion of the gear
  • the manufacture of the gear can be done inter alia by a multi-component injection molding process.
  • the shrinkage may be linear as well as non-linear to the material thickness, so that stresses arise in the interior of the gears and the manufacturing accuracy, especially in the area of the toothing decreases.
  • Cogs already have recesses so that spokes and struts stop like a truss.
  • the recesses reduce the amount of material between the gear outer surface and the gear hub. A reduced
  • Quantity of material causes on the one hand a poorer force distribution of the inner power lines. On the other hand causes the introduction of spokes and struts inhomogeneous shrinkage. Due to the uneven shrinkage occurs inaccuracy in the gearing geometry, which in turn to a
  • Micro-stresses which lead to material damage in the contact area during force peaks.
  • the object of the invention is to overcome the disadvantages listed above. It is a gear to be produced by a simple process, which has only small deviations in production after casting.
  • This object is achieved by a method which results in an improved gear by performing the multi-component injection molding by first injecting the gear outer wall-forming plastic into the cavity of a mold and directly following the gear core (the
  • the (remaining) cavity of the mold is injected.
  • the resulting gear is firstly not homogeneous in its material properties, at the same time has a compact outer skin and has thirdly traversed by cells / gas inclusions core.
  • Azodicarbonamide or sulfohydrazide allows the production of the gear in just one step. Thus, advantageously only one mold is needed for the production. It is advantageous that the production time thereby in comparison to the multi-stage production, for. B. with different materials, is significantly shortened.
  • the gear has optimum thermal conductivity, since there are no recesses. Another advantage is that the weight of the gear is lower compared to solid material due to a foamed core.
  • the gear 1 has a tooth wall 2 forming the plastic wall, which consists of a non-foamed plastic material.
  • Tooth outer wall 2 has the thickness d1 and d2, the tooth width b and the
  • the thicknesses d1 and d2 of the tooth outer wall 2 may differ in their thicknesses.
  • the thicknesses d1 and d2 are equally strong at all points of the outer wall of the gear. This means that the thickness d2, which is present below the tooth bottoms 5 of the teeth 6, is identical to the thickness d1 at the end faces 6 and 7 of the toothed wheel 1.
  • Opening is introduced into the mold.
  • the plastic that forms the tooth outer wall 2 is first injected. Without interruption will be in
  • the sectional view of the gear 1 shows the injection range of the
  • Foam core 3 is injected.
  • the gear 1 is therefore not homogeneous in its material properties, but has a compact outer wall 3, which is harder than the cell / gas inclusions 11 traversed core. 2
  • a feature not shown in FIG. 1 is that the compact outer wall 2 is free of cells or gas inclusions 11.
  • the gear core 3, however, has cells / gas inclusions 11.
  • a further embodiment of the invention has the feature that the outer wall 2 has the thickness (d1), which is 10% to 40%, preferably 15% to 20% compared to the gear width (b).
  • the outer wall 2 has a thickness (d2) which is 10% to 40%, preferably 0% to 5% compared to
  • Root diameter (df) is.
  • the thickness of the outer wall 2 may be identical at all points of the gear.
  • the gear 1 consists of the injection molding plastic polyoxymethylene, polyamide, polybutylene terephthalate, polyphenylene sulfide,
  • Polyetheretherketone or polypropylene are Polyetheretherketone or polypropylene.
  • the plastic component forming the inner core 3 of the Zahnradesl contains additives that give the plastic a higher strength.
  • fiber or carbon fiber inputs are provided in the plastic. This is to be provided in particular in a further embodiment in which the gear 1 is to transmit large powers.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Gears, Cams (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

Procédé de fabrication d'une roue dentée (1) par moulage par injection multimatière, le moulage par injection multimatière étant réalisé selon le mode suivant : une matière plastique destinée à former la paroi externe (2) de la roue dentée est d'abord injectée dans la cavité d'un moule, et directement après, une matière plastique expansible destinée à former le coeur de la roue dentée (3) (la partie interne de la roue dentée) est injectée dans la cavité restante du moule.
PCT/EP2012/004589 2011-12-30 2012-11-02 Roue dentée en matière plastique à coeur expansé et procédé correspondant WO2013097913A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011122608.0 2011-12-30
DE102011122608A DE102011122608A1 (de) 2011-12-30 2011-12-30 Kunststoffzahnrad mit geschäumtem Kern und ein Verfahren dazu

Publications (1)

Publication Number Publication Date
WO2013097913A1 true WO2013097913A1 (fr) 2013-07-04

Family

ID=47177890

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/004589 WO2013097913A1 (fr) 2011-12-30 2012-11-02 Roue dentée en matière plastique à coeur expansé et procédé correspondant

Country Status (2)

Country Link
DE (1) DE102011122608A1 (fr)
WO (1) WO2013097913A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019137838A1 (fr) * 2018-01-10 2019-07-18 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Équipement de réglage pourvu d'une partie de dentelure en thermoplastique expansé

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016213529A1 (de) 2016-07-25 2018-01-25 Zf Friedrichshafen Ag Kunststoffzahnrad für ein Getriebe und Verfahren zum Herstellen eines Kunststoffzahnrads
DE102017220677A1 (de) * 2017-11-20 2019-05-23 Zf Friedrichshafen Ag Bauteil, Aktuator sowie Kraftfahrzeug
EP3502511B1 (fr) 2017-12-22 2020-07-08 EMS-Patent AG Roue dentée d'une masse de formage en polyamide
DE102020201461A1 (de) 2020-02-06 2021-08-12 Thyssenkrupp Ag Verfahren zur Herstellung eines Schneckenrads für eine Hilfskraftlenkung eines Kraftfahrzeugs, Schneckenrad und Kraftfahrzeuglenkung
DE102020201490A1 (de) 2020-02-07 2021-08-12 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg Kunststoffbauteil für ein Kraftfahrzeug

Citations (7)

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Publication number Priority date Publication date Assignee Title
JPS5624252A (en) * 1979-08-03 1981-03-07 Hitachi Ltd Rack and pinion device
DE3414842A1 (de) 1984-04-19 1985-11-21 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Antriebseinheit, insbesondere fuer wischhebel von kraftfahrzeugen
EP0298356A1 (fr) * 1987-07-03 1989-01-11 INA Wälzlager Schaeffler KG Procédé pour la fabrication d'une pièce en matière plastique et élément de construction
JP2002106683A (ja) * 2000-09-27 2002-04-10 Asahi Kasei Corp 結晶性樹脂組成物による成形歯車およびその射出成形方法
US20040222072A1 (en) * 2003-05-09 2004-11-11 Laitram, L.L.C. [molded sprocket]
DE102007063422A1 (de) 2006-12-19 2008-07-17 Suzuki Motor Corporation, Hamamatsu Kunststoffzahnrad
JP2008221519A (ja) * 2007-03-09 2008-09-25 Seiko Epson Corp 合成樹脂成形品及び電子機器

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EP0297158A1 (fr) * 1987-07-01 1989-01-04 Battenfeld GmbH Procédé de fabrication de corps moulés multicouches en matière thermoplastiques
DE4340990C2 (de) * 1993-11-05 1996-09-19 Battenfeld Gmbh Verfahren und Vorrichtung zum Spritzgießen von mehrschichtigen Gegenständen
DE4414258C2 (de) * 1994-04-23 1996-07-25 Battenfeld Gmbh Verfahren zum Spritzgießen von mindestens aus zwei unterschiedlichen Schichten bestehenden Gegenständen
DE19526712C2 (de) * 1995-07-24 2000-07-20 Schulman A Gmbh Zusammensetzung auf Polymerbasis zur Herstellung von nicht magnetischen metallhaltigen Formkörpern, Verfahren und Verwendung
DE19808145A1 (de) * 1997-08-21 1999-02-25 Structoform Spritzgiesen Aniso Verfahren zum Spritzgießen, Spritzgießform und Spritzgießvorrichtung
DE10013627A1 (de) * 2000-03-18 2001-09-27 Pts Plastic Technologie Servic Verfahren zur Herstellung von Weich/Weich- Sandwichteilen auf flachen Formteilen
JP4108269B2 (ja) * 2000-12-07 2008-06-25 株式会社リコー 樹脂成形装置及び樹脂成型方法
DE10160523A1 (de) * 2000-12-08 2002-10-02 Wahl Optoparts Gmbh Kunststoffsubstrat für reflektierende optische Bauelemente und Verfahren zur Herstellung eines solchen Substrates
TWI425705B (zh) * 2010-12-21 2014-02-01 私立中原大學 Double - material co - forming bipolar plate and its preparation method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5624252A (en) * 1979-08-03 1981-03-07 Hitachi Ltd Rack and pinion device
DE3414842A1 (de) 1984-04-19 1985-11-21 SWF Auto-Electric GmbH, 7120 Bietigheim-Bissingen Antriebseinheit, insbesondere fuer wischhebel von kraftfahrzeugen
EP0298356A1 (fr) * 1987-07-03 1989-01-11 INA Wälzlager Schaeffler KG Procédé pour la fabrication d'une pièce en matière plastique et élément de construction
JP2002106683A (ja) * 2000-09-27 2002-04-10 Asahi Kasei Corp 結晶性樹脂組成物による成形歯車およびその射出成形方法
US20040222072A1 (en) * 2003-05-09 2004-11-11 Laitram, L.L.C. [molded sprocket]
DE102007063422A1 (de) 2006-12-19 2008-07-17 Suzuki Motor Corporation, Hamamatsu Kunststoffzahnrad
JP2008221519A (ja) * 2007-03-09 2008-09-25 Seiko Epson Corp 合成樹脂成形品及び電子機器

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019137838A1 (fr) * 2018-01-10 2019-07-18 Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Coburg Équipement de réglage pourvu d'une partie de dentelure en thermoplastique expansé

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Publication number Publication date
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