DE2712719A1 - INJECTION MOLDED SPUR WHEEL MADE OF THERMOPLASTIC PLASTIC - Google Patents
INJECTION MOLDED SPUR WHEEL MADE OF THERMOPLASTIC PLASTICInfo
- Publication number
- DE2712719A1 DE2712719A1 DE19772712719 DE2712719A DE2712719A1 DE 2712719 A1 DE2712719 A1 DE 2712719A1 DE 19772712719 DE19772712719 DE 19772712719 DE 2712719 A DE2712719 A DE 2712719A DE 2712719 A1 DE2712719 A1 DE 2712719A1
- Authority
- DE
- Germany
- Prior art keywords
- spur gear
- width
- injection molded
- thermoplastic plastic
- injection
- 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.)
- Pending
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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14819—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the inserts being completely encapsulated
-
- 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
- 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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
-
- 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
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
-
- 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
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)
Description
Maschinenfabrik Reinhausen Regensburg, den 21 Gebrüder Scheubeck GmbH & Co KG 219Ma/Gl RegensburgMaschinenfabrik Reinhausen Regensburg, 21 Gebrüder Scheubeck GmbH & Co KG 219Ma / Gl regensburg
Spritzgegossenes Stirnrad aus thermoplastischen Kunststoff S injection-molded spur gear made of thermoplastic material
Die Erfindung bezieht sich auf ein spritzgegossenes Stirnrad, wie es im Oberbegriff des Anspruches 1 näher bezeichnet ist.The invention relates to an injection-molded spur gear as described in more detail in the preamble of claim 1.
Es ist bekannt, die Zähne von Zahnrädern breitenballig auszuführen, d.h. die Zähne werden an den Stirnseiten dünner als in der Zahnmitte ausgebildet. Mit derartigen Zähnen werden sogenannte Kantenträger vermieden, es erfolgt ein definierter Kraftangriff beim Abwälzen, was wiederum die Dauerfestigkeit der Zahnräder erhöht. Auch laufen derartig ausgebildete Zahnräder geräuscharm. Allerdings ist die Herstellung der Breitenballigkeit sehr aufwendig. Läßt sich die Breitenballigkeit z.B. bei spritzgegossenen Kegelrädern noch durch entsprechendes Ausarbeiten der Form erzielen, so ist dies bei spritzgegossenen Stirnrädern nicht möglich, da das Stirnrad nicht mehr aus dem Werkzeug entformt werden könnte.It is known to design the teeth of gears with broad crowns, i.e. the teeth are made thinner on the end faces than in the center of the teeth. With such teeth, so-called edge carriers are avoided, there is a defined force application when Rolling, which in turn increases the fatigue strength of the gears. Gearwheels designed in this way also run with little noise. However the production of the crowning is very complex. Can the crowning be measured e.g. in the case of injection-molded bevel gears can still be achieved by appropriately working out the shape, this is not possible with injection-molded spur gears because the spur gear could no longer be removed from the mold.
Aufgabe der Erfindung ist es, ein spritzgegossenes Stirnrad aus thermoplastischen Kunststoff mit breitenballigen Zähnen anzugeben, das einfach und billig herzustellen ist. Diese Aufgabe wird erfindungsgemäß durch die im Kennzeichen des Patentanspruches 1 angegebenen Mittel gelöst.The object of the invention is to provide an injection-molded spur gear made of thermoplastic material with broad-crowned teeth, that is easy and cheap to manufacture. This object is achieved according to the invention solved by the means specified in the characterizing part of claim 1.
Die Erfindung macht sich hierbei eine Eigenschaft des Kunststoffes zu Nutzen, die darin liegt, daß der thermoplastische Kunststoff beim Erkalten ein starkes Schrumpfverhalten besitzt. Dieses Schrumpfen des thermoplastischen Kunststoffes kann bis zu einigen Prozenten seines ursprünglichen Volumens betragen. Durcfi den erfindungsgemäß eingespritzten Metallring wird nun das Schrumpfen des Kunststoffes so gesteuert, daß die Stirnseiten der Zähne mehr zur Nabe hin schrumpfen, während die Zahnmitte sich beim Schrumpfvorgang am*Metallring staut. Hierdurch entsteht die gewünschte Breitenballigkeit.The invention makes this a property of the plastic to benefit, which is that the thermoplastic material has a strong shrinkage behavior when it cools. This shrinking of the thermoplastic material can be up to a few percent of its original volume. Performed according to the invention injected metal ring, the shrinkage of the plastic is now controlled so that the front sides of the teeth shrink more towards the hub, while the center of the tooth accumulates on the * metal ring during the shrinking process. This creates the desired crowning shape.
8098 3 9/^)348098 3 9 / ^) 34
Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung
dargestellt und wird im folgenden näher beschrieben:An embodiment of the invention is shown in the drawing
and is described in more detail below:
Der Stirnradkörper 1 besitzt ein Nabenteil 2 sowie ein die Zähne 3
tragendes verstärkt ausgeführtes äußeres Teil 4. In diesem äußeren Teil 4 ist ein Metallring 5 eingespritzt, dessen äußerer Radius 6
nur wenig kleiner ist als der Fußkreis 7 des Stirnrades. Die
Breite b des Metallringes 5 ist etwa halb so groß wie die Breite B des Zahnkranzes. Das verstärkte Schrumpfverhalten des Kunststoffes
um den Metallring herum ist durch Pfeile angedeutet. Je nach dem
Verhältnis der Breite B der Verzahnung zur Breite b des Metallringes läßt sich eine unterschiedliche Breitenballigkeit erzielen.The spur gear body 1 has a hub part 2 and a reinforced outer part 4 carrying the teeth 3. In this outer part 4, a metal ring 5 is injected, the outer radius 6 of which
is only slightly smaller than the root circle 7 of the spur gear. the
Width b of the metal ring 5 is about half as large as the width B of the ring gear. The increased shrinkage behavior of the plastic around the metal ring is indicated by arrows. Depending on
The ratio of the width B of the toothing to the width b of the metal ring can be used to achieve a different crowning.
809839/03^7809839/03 ^ 7
e e r s e tiee e r s e tie
Claims (1)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772712719 DE2712719A1 (en) | 1977-03-23 | 1977-03-23 | INJECTION MOLDED SPUR WHEEL MADE OF THERMOPLASTIC PLASTIC |
| JP3180978A JPS53137359A (en) | 1977-03-23 | 1978-03-22 | Injection molded spur gear of thermoplastic synthetic resin |
| FR7808541A FR2385006A1 (en) | 1977-03-23 | 1978-03-23 | Thermoplastics injection-moulded spur gear with bulging teeth - has embedded metal ring to control shrinkage of moulding compound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19772712719 DE2712719A1 (en) | 1977-03-23 | 1977-03-23 | INJECTION MOLDED SPUR WHEEL MADE OF THERMOPLASTIC PLASTIC |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2712719A1 true DE2712719A1 (en) | 1978-09-28 |
Family
ID=6004424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19772712719 Pending DE2712719A1 (en) | 1977-03-23 | 1977-03-23 | INJECTION MOLDED SPUR WHEEL MADE OF THERMOPLASTIC PLASTIC |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS53137359A (en) |
| DE (1) | DE2712719A1 (en) |
| FR (1) | FR2385006A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4332146A (en) * | 1980-11-24 | 1982-06-01 | Hitachi, Ltd. | Drive force transmitting device for ice-making tray of automatic ice-making machine |
| US5852951A (en) * | 1994-10-04 | 1998-12-29 | Briggs & Stratton Corporation | Composite gear and method of making same |
| CN109228208A (en) * | 2018-09-20 | 2019-01-18 | 昆山弘正电子科技有限公司 | The injection mold of router base and the Shooting Technique of router base |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2487772B1 (en) * | 1980-08-04 | 1987-01-09 | Haubtmann A Sa Ets | MONOBLOCK ASSEMBLY COMPRISING AT LEAST ONE TRAY WITH OR WITHOUT CHAIN PROTECTOR FOR CRIMPING ON HANDLES, USEFUL FOR BICYCLES AND SIMILAR VEHICLES, AND MANUFACTURING METHOD THEREOF |
| FR3021576B1 (en) * | 2014-06-03 | 2016-06-24 | Jtekt Europe Sas | METHOD FOR MANUFACTURING A WHEEL WITH REINFORCING STRAP |
-
1977
- 1977-03-23 DE DE19772712719 patent/DE2712719A1/en active Pending
-
1978
- 1978-03-22 JP JP3180978A patent/JPS53137359A/en active Pending
- 1978-03-23 FR FR7808541A patent/FR2385006A1/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4332146A (en) * | 1980-11-24 | 1982-06-01 | Hitachi, Ltd. | Drive force transmitting device for ice-making tray of automatic ice-making machine |
| US5852951A (en) * | 1994-10-04 | 1998-12-29 | Briggs & Stratton Corporation | Composite gear and method of making same |
| US6014808A (en) * | 1994-10-04 | 2000-01-18 | Briggs & Stratton Corporation | Method of making a composite gear |
| US6064027A (en) * | 1994-10-04 | 2000-05-16 | Briggs & Stratton Corporation | Method of making a composite gear |
| US6077063A (en) * | 1994-10-04 | 2000-06-20 | Briggs & Stratton Corporation | Tool for making a composite gear |
| CN109228208A (en) * | 2018-09-20 | 2019-01-18 | 昆山弘正电子科技有限公司 | The injection mold of router base and the Shooting Technique of router base |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2385006A1 (en) | 1978-10-20 |
| JPS53137359A (en) | 1978-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE2924198C2 (en) | Hollow body made of thermoplastic material produced by blow molding | |
| DE3202254C2 (en) | Method and device for producing a toothed rack | |
| DE2429543A1 (en) | DEVICE FOR FORGING HELICAL OR CURLY TOOTHED GEARS, IN PARTICULAR BEVEL GEARS | |
| EP2899430B1 (en) | Multiple component gear wheel | |
| DE2627346A1 (en) | METHOD OF MANUFACTURING PLASTIC ARTICLES WITH SLIDING PARTS | |
| DE2712719A1 (en) | INJECTION MOLDED SPUR WHEEL MADE OF THERMOPLASTIC PLASTIC | |
| DE3611910A1 (en) | IMPELLER FOR A RADIAL PUMP | |
| DE102010033675A1 (en) | Method of overmolding and molding for its implementation | |
| EP0826442B1 (en) | Vehicle wheel | |
| DE1729836A1 (en) | Method and device for manufacturing pneumatic vehicle tires | |
| DE112011100606T5 (en) | 2Turbine wheel and method for its production | |
| DE2439840C3 (en) | Vehicle wheel, especially for tubeless tires | |
| DE1883612U (en) | ZINK BASKET FOR HAYMAKING MACHINERY. | |
| DE1950374A1 (en) | Plastic gear with metal core | |
| DE1227642B (en) | Mechanical mold locking device on injection molding machines for plastics | |
| DE2438141A1 (en) | Plastic and metal composite spur gear - has plastic outer gear section moulded onto metal hub and retained by projections | |
| DE102022110064A1 (en) | Method of manufacturing a gear by injection compression molding | |
| DE2016166C (en) | Pressure or injection permanent mold | |
| DE468792C (en) | Wheels made by pressing together layers of fibrous material | |
| DE9421012U1 (en) | Steering wheel skeleton | |
| EP1088744B1 (en) | Steering angle sensor with code disk | |
| DE807465C (en) | Drive with internal teeth arranged on a drum connected to the impeller, especially for road vehicles | |
| DE19523690A1 (en) | Method of mfg. workpieces with profiled external contour - involves using die which with each travel of press remains in opened out state brought about by pressing force until after ejection of workpiece | |
| DE807466C (en) | Drive for road vehicles | |
| DE2525436C3 (en) | Digital display device with manual transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OAP | Request for examination filed | ||
| OD | Request for examination | ||
| OHN | Withdrawal |