CH688296B5 - A method of manufacturing a plastic wire wheel axis. - Google Patents
A method of manufacturing a plastic wire wheel axis. Download PDFInfo
- Publication number
- CH688296B5 CH688296B5 CH00935/95A CH93595A CH688296B5 CH 688296 B5 CH688296 B5 CH 688296B5 CH 00935/95 A CH00935/95 A CH 00935/95A CH 93595 A CH93595 A CH 93595A CH 688296 B5 CH688296 B5 CH 688296B5
- Authority
- CH
- Switzerland
- Prior art keywords
- mold
- axis
- wire
- knife
- metal
- 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
- B29C45/14—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
- B29C45/14549—Coating rod-like, wire-like or belt-like articles
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B13/00—Gearwork
- G04B13/02—Wheels; Pinions; Spindles; Pivots
-
- G—PHYSICS
- G04—HOROLOGY
- G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
- G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
- G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
- G04D3/0017—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of gearworks
- G04D3/002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of gearworks for gear wheels or 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
1 1
CH 688 296G A3 CH 688 296G A3
2 2
Description Description
La présente invention a pour objet un procédé de fabrication d'une roue en plastique à axe métallique consistant à mouler par injection la roue en plastique sur l'axe métallique, procédé dans lequel un nouvel axe est introduit dans le moule au moins approximativement simultanément à l'éjection de la pièce moulée. The subject of the present invention is a method of manufacturing a plastic wheel with a metal axis consisting in injection molding the plastic wheel on the metal axis, a method in which a new axis is introduced into the mold at least approximately simultaneously with ejection of the molded part.
Ce procédé est particulièrement destiné à la fabrication de roues dentées pour l'horlogerie. This process is particularly intended for the manufacture of toothed wheels for watchmaking.
Du document DE-A 3 135 259, on connaît un procédé de fabrication de roues en plastique à axe métallique selon lequel les axes métalliques arrivent successivement dans le moule par un dispositif d'alimentation pour venir se placer entre un éjecteur et la pièce moulée, dans le prolongement de l'axe de la pièce moulée, de telle sorte que la pièce moulée est éjectée par l'intermédiaire du nouvel axe qui prend la place, dans le moule, de l'axe de la pièce éjectée, et ainsi de suite. On obtient ainsi un processus continu dans lequel la phase d'introduction d'un nouvel axe dans le moule est confondue avec la phase d'éjection. Document DE-A 3 135 259 discloses a process for manufacturing plastic wheels with a metal axis according to which the metal axes arrive successively in the mold by a supply device to come to be placed between an ejector and the molded part, in the extension of the axis of the molded part, so that the molded part is ejected via the new axis which takes the place, in the mold, of the axis of the ejected part, and so on . A continuous process is thus obtained in which the phase of introducing a new axis into the mold is merged with the ejection phase.
Ce procédé est certainement tout-à-faire valable pour des pièces de dimensions moyennes, mais difficile à mettre en oeuvre et peu fiable pour la fabrication de très petites pièces telles qu'on les rencontre dans un mouvement de montre, en raison des faibles dimensions des axes métalliques, notamment de leur faible diamètre. Une alimentation régulière n'est pas garantie, de même que la poussée d'un axe par un autre axe. This process is certainly all-to-do valid for parts of medium dimensions, but difficult to implement and unreliable for the manufacture of very small parts such as one meets them in a watch movement, because of the small dimensions metal axes, in particular of their small diameter. Regular feeding is not guaranteed, nor is pushing from one axis to another axis.
La présente invention a pour but d'obvier aux inconvénients du procédé décrit ci-dessus dans son application à de très petites pièces, tout en conservant les avantages de ce procédé en ce qui concerne la fabrication en continu. The object of the present invention is to obviate the drawbacks of the process described above in its application to very small parts, while retaining the advantages of this process with regard to continuous manufacturing.
Le procédé selon l'invention est caractérisé en ce qu'on utilise un moule tel que l'axe métallique de la pièce terminée, mais encore dans le moule fermé, dépasse hors du moule, qu'on introduit dans ce moule un fil métallique rond déroulé d'une torche et préalablement redressé et calibré destiné à constituer l'axe désiré, qu'on injecte la matière plastique, qu'au cours de ces opérations, on coupe le fil à la longueur de l'axe désiré, qu'on ouvre le moule et éjecte la pièce terminée et qu'on fait avancer au moins approximativement simultanément le fil dans le moule et ainsi de suite. The method according to the invention is characterized in that a mold is used such that the metal axis of the finished part, but also in the closed mold, protrudes outside the mold, that a round metal wire is introduced into this mold unwound from a torch and previously straightened and calibrated intended to constitute the desired axis, that the plastic material is injected, that during these operations, the wire is cut to the length of the desired axis, that open the mold and eject the finished part and advance the wire through the mold at least approximately simultaneously and so on.
Le fil peut être coupé de longueur simultanément à la fermeture du moule, après cette fermeture et avant injection, simultanément à l'injection ou après l'injection. The wire can be cut in length simultaneously with the closing of the mold, after this closing and before injection, simultaneously with the injection or after the injection.
Le fil, très mince, n'est pas utilisé comme éjecteur et il est guidé jusqu'à proximité de l'endroit où il est coupé. The very thin wire is not used as an ejector and is guided close to where it is cut.
Par rapport au procédé antérieur, on supprime ainsi la fabrication préalable des axes et leur chargement dans un dispositif d'alimentation du moule. L'obtention de l'axe se fait quasiment simultanément au moulage de la roue sur cet axe. Le sectionnement du fil peut être assuré par des couteaux solidaires des deux coquilles du moule. Compared to the previous method, this eliminates the prior manufacture of the axes and their loading in a mold supply device. The axis is obtained almost simultaneously with the molding of the wheel on this axis. The wire cutting can be ensured by knives integral with the two mold shells.
Le dessin annexé représente schématiquement un exemple de mise en œuvre du procédé selon l'invention. The appended drawing schematically represents an example of implementation of the method according to the invention.
La fig. 1 est une vue en coupe du moule fermé juste après l'injection de la matière synthétique. Fig. 1 is a sectional view of the closed mold just after the injection of the synthetic material.
La fig. 2 illustre le sectionnement du fil métallique. Fig. 2 illustrates the sectioning of the metal wire.
La fig. 3 illustre la phase d'éjection et de l'avance du fil métallique. Fig. 3 illustrates the phase of ejection and advance of the metal wire.
Le dessin représente schématiquement un moule constitué de deux coquilles 1 et 2 s'écartant l'une de l'autre pour l'ouverture du moule. La coquille 1 est constituée de trois pièces 11, 12, 13. De même, la coquille 2 est constituée de trois pièces 21, 22, 23. Les pièces 12 et 22 sont des pièces intercalaires déterminant l'épaisseur de la roue à mouler 3 et présentant la forme de sa denture 4. Le moule contient également la forme d'un pignon 5 associé à la roue dentée 3. La coquille 1 présente un puits d'injection 6 pour l'injection de la matière plastique. The drawing schematically represents a mold consisting of two shells 1 and 2 deviating from one another for the opening of the mold. The shell 1 consists of three parts 11, 12, 13. Likewise, the shell 2 consists of three parts 21, 22, 23. The parts 12 and 22 are intermediate parts determining the thickness of the molding wheel 3 and having the shape of its toothing 4. The mold also contains the shape of a pinion 5 associated with the toothed wheel 3. The shell 1 has an injection well 6 for injecting the plastic.
Le fil d'acier 7 en torche, redressé et calibré, avance dans le moule d'une longueur déterminé. Il est guidé par une pièce de guidage 8 présentant un alésage cylindrique. Le moule est ensuite fermé et la matière plastique est injectée de manière à former la roue dentée 3 sur le fil 7. Ce fil 7 assure la fermeture étanche des parties 13 et 23 du moule. The steel wire 7 in torch, straightened and calibrated, advances in the mold of a determined length. It is guided by a guide piece 8 having a cylindrical bore. The mold is then closed and the plastic material is injected so as to form the toothed wheel 3 on the wire 7. This wire 7 ensures the sealed closure of the parts 13 and 23 of the mold.
Le fil 7 est ensuite coupé de longueur entre un couteau 9 et un contre-couteau 10 (fig. 2). The wire 7 is then cut in length between a knife 9 and a counter knife 10 (fig. 2).
Le moule est ensuite ouvert (fig. 3) et la roue 3 munie de son axe 30 est éjectée par un éjecteur non représenté. Simultanément à cette éjection ou immédiatement après celle-ci, le fil 7 avance à nouveau d'une longueur d'axe dans le moule et l'opération d'injection et de coupe du fil est répétée et ainsi de suite. The mold is then opened (FIG. 3) and the wheel 3 provided with its axis 30 is ejected by an ejector not shown. Simultaneously with this ejection or immediately after it, the wire 7 again advances an axis length in the mold and the operation of injection and cutting of the wire is repeated and so on.
Le moule a bien entendu été représenté de façon schématique. En généralité, il se présente de façon plus complexe. De tels moules sont toutefois bien connus en soi. Ils présentent des moyens permettant d'écarter l'une de l'autre les parties 11, 12, 13, respectivement 21, 22, 23. The mold has of course been shown schematically. In general, it presents itself in a more complex way. Such molds are however well known per se. They have means allowing parts 11, 12, 13, respectively 21, 22, 23 to be separated from one another.
Dès que le moule est fermé sur le fil 7, ce fil peut être sectionné. Le sectionnement peut donc se produire simultanément à la fermeture du moule ou immédiatement après cette fermeture. Le couteau 9 et le contre-couteau 10 pourraient donc être respectivement solidaires des deux coquilles 1 et 2 du moule comme indiqué en traitillés à la fig. 2. As soon as the mold is closed on the wire 7, this wire can be cut. Sectioning can therefore occur simultaneously with the closing of the mold or immediately after this closing. The knife 9 and the counter knife 10 could therefore be respectively secured to the two shells 1 and 2 of the mold as indicated in broken lines in FIG. 2.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00935/95A CH688296B5 (en) | 1995-04-03 | 1995-04-03 | A method of manufacturing a plastic wire wheel axis. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00935/95A CH688296B5 (en) | 1995-04-03 | 1995-04-03 | A method of manufacturing a plastic wire wheel axis. |
Publications (2)
Publication Number | Publication Date |
---|---|
CH688296GA3 CH688296GA3 (en) | 1997-07-31 |
CH688296B5 true CH688296B5 (en) | 1998-01-30 |
Family
ID=4198603
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH00935/95A CH688296B5 (en) | 1995-04-03 | 1995-04-03 | A method of manufacturing a plastic wire wheel axis. |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH688296B5 (en) |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR924397A (en) * | 1946-03-25 | 1947-08-04 | Method of manufacturing aiguillettes and the like by molding | |
FR990306A (en) * | 1949-05-04 | 1951-09-20 | Jaeger Ets Ed | Improvement brought to the cogs of watch movements and more particularly to the escape wheels |
KR930002483Y1 (en) * | 1991-05-27 | 1993-05-13 | 김순태 | Settlements for bag |
-
1995
- 1995-04-03 CH CH00935/95A patent/CH688296B5/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
CH688296GA3 (en) | 1997-07-31 |
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PL | Patent ceased |