CH278347A - Process for the manufacture of a hollow molded plastic rim and mold for implementing this process. - Google Patents

Process for the manufacture of a hollow molded plastic rim and mold for implementing this process.

Info

Publication number
CH278347A
CH278347A CH278347DA CH278347A CH 278347 A CH278347 A CH 278347A CH 278347D A CH278347D A CH 278347DA CH 278347 A CH278347 A CH 278347A
Authority
CH
Switzerland
Prior art keywords
rim
mold
molded
segment
holes
Prior art date
Application number
Other languages
French (fr)
Inventor
Ferodo Societe Anonyme Fran Du
Original Assignee
Ferodo Sa
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 Ferodo Sa filed Critical Ferodo Sa
Publication of CH278347A publication Critical patent/CH278347A/en
Priority claimed from US460820A external-priority patent/US3419598A/en
Priority claimed from US467705A external-priority patent/US3367941A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D213/36—Radicals substituted by singly-bound nitrogen atoms
    • C07D213/40—Acylated substituent nitrogen atom
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/06—Permanent moulds for shaped castings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C9/00—Moulds or cores; Moulding processes
    • B22C9/22—Moulds for peculiarly-shaped castings
    • B22C9/28—Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00—Subject matter not provided for in other groups of this subclass
    • B29D99/0032—Producing rolling bodies, e.g. rollers, wheels, pulleys or pinions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00—Rims
    • B60B21/02—Rims characterised by transverse section
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B21/00—Rims
    • B60B21/06—Rims characterised by means for attaching spokes, i.e. spoke seats
    • B60B21/062—Rims characterised by means for attaching spokes, i.e. spoke seats for bicycles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B25/00—Rims built-up of several main parts ; Locking means for the rim parts
    • B60B25/02—Segmented rims, e.g. with segments arranged in sections; Connecting equipment, e.g. hinges; Insertable flange rings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
    • B60B5/00—Wheels, spokes, disc bodies, rims, hubs, wholly or predominantly made of non-metallic material
    • B60B5/02—Wheels, spokes, disc bodies, rims, hubs, wholly or predominantly made of non-metallic material made of synthetic material
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D213/26—Radicals substituted by halogen atoms or nitro radicals
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D213/36—Radicals substituted by singly-bound nitrogen atoms
    • C07D213/38—Radicals substituted by singly-bound nitrogen atoms having only hydrogen or hydrocarbon radicals attached to the substituent nitrogen atom
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D213/54—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/55—Acids; Esters
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/24—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with substituted hydrocarbon radicals attached to ring carbon atoms
    • C07D213/54—Radicals substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
    • C07D213/57—Nitriles
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/61—Halogen atoms or nitro radicals
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/62—Oxygen or sulfur atoms
    • C07D213/63—One oxygen atom
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/04—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D213/60—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members having no bond between the ring nitrogen atom and a non-ring member or having only hydrogen or carbon atoms directly attached to the ring nitrogen atom with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D213/62—Oxygen or sulfur atoms
    • C07D213/63—One oxygen atom
    • C07D213/65—One oxygen atom attached in position 3 or 5
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D213/00—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members
    • C07D213/02—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members
    • C07D213/89—Heterocyclic compounds containing six-membered rings, not condensed with other rings, with one nitrogen atom as the only ring hetero atom and three or more double bonds between ring members or between ring members and non-ring members having three double bonds between ring members or between ring members and non-ring members with hetero atoms directly attached to the ring nitrogen atom
    • 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
    • B29L2031/00—Other particular articles
    • B29L2031/32—Wheels, pinions, pulleys, castors or rollers, Rims

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Medicinal Chemistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Materials Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Description

       

  
 



  Procédé pour la fabrication d'une jante creuse en matière plastique moulée
 et moule pour la mise en oeuvre de ce procédé.



     Cette    invention se rapporte à la fabrication de jantes creuses destinées à recevoir un bandage élastique pneumatique ou plein, pour roues de bicyclettes, de voitures d'enfants, etc., par moulage d'une matière plastique appropriée, tellepar exemple qu'une résine synthétique, avec incorporation éventuelle d'une matière textile on cellulosique appropriée.



   Le procédé de fabrication suivant l'invention est caractérisé en ce que la matière moulée est comprimée dans un moule et en ce que le démoulage de la partie extérieure   conclave    de la jante se fait en chassant vers l'extérieur   l'élément    de moule qui a conformé cette partie.



   L'invention a également pour objet un moule pour la mise en oeuvre de ce procédé.



  Ce moule peut être agencé pour obtenir des jantes perforées, c'est-à-dire dont les trous servant à la fixation des rayons sont formés dans le moule même où la matière plastique prend la forme d'une jante creuse. Ce moule peut aussi, avec   certaines    modifications, permettre la fabrication directe de roues dont les rayons et le moyeu sont formés d'une pièce avec la jante creuse.



   Le moule suivant l'invention est   caracté-    risé en ce que sa partie périphérique est constituée par au moins un segment dont la section présente sur son côté interne une forme eorrespondant au profil concave de la périphérie de la jante et en ce qu'il comprend des moyens destinés à chasser vers l'extérieur ladite partie périphérique.



   Une série de saillies ou noyaux propres à ménager dans la jante, lors du moulage, les trous destinés à recevoir les rayons, s'il s'agit de roues de bicyclettes ou similaires, peuvent être fixés de manière amovible ou non sur le segment précité.



   Ces trous ont préférablement une surface d'appui sphérique sur laquelle les têtes des écrous de fixation des rayons trouvent un appui stable quelle que soit leur inclinaison.   



   Le e dégagement du ou des segments peut    être obtenu à la main ou mécaniquement et être facilité par l'élasticité du segment si celui-ci a un rayon de courbure plus grand quand il est à l'état libre que lorsqu'il est serré autour des parties centrales du moule.



   Un dispositif mécanique peut être prévu pour produire ce dégagement du segment de   moulage    avec facilité malgré l'adhérence qui peut être due à la nature de la matière plastique utilisée et de l'insertion des noyaux dans cette   matière    Ce dispositif peut comprendre un support, sur lequel on place l'ensemble de la jante moulée et du segment qui l'entoure, et un   levier    qui est articulé sur un bras lui-même articulé autour du centre de ce support et sur lequel un galet est monté de façon à pouvoir être appuyé du dedans vers le dehors contre le bord du segment faisant saillie sur un côté de la jante.

     I1    suffit de   manoeu-     vrer ce levier de façon à faire rouler le galet contre le bord du segment avec une   pression    suffisante pour écarter celui-ci de la jante en matière plastique.



   L'invention vise enfin une jante creuse en   matière    plastique moulée destinée à recevoir un bandage élastique, caractérisée en ce qu'elle présente des trous venus de moulage avec la jante pour la fixation des rayons.



   Le dessin   ci-annexé    montre, à titre d'exemple, une forme d'exécution du moule suivant l'invention, ainsi qu'un modèle de jante sus  eeptible    d'être fabriqué avec ce moule.



   La   fig. i    est une coupe verticale partielle   dn    moule.



   La fig.   2    montre en perspective une portion du segment de moulage.



   La fig. 3 est une coupe verticale d'un dispositif mécanique pour l'extraction du segment hors de la jante.



   La fig. 4 est un plan de ce dispositif.



   Les fig. 5 et 6 montrent en élévation et en coupe transversale une portion d'une bande à larges mailles confectionnée en matière fibreuse et   snseeptible      d'être    incorporée dans la matière plastique de la jante, lors du mou  lage.   



   Les fig. 7 et 8 montrent respectivement vue de l'extérieur et en coupe transversale une variante de réalisation d'une jante suivant l'invention.



   Le moule comprend deux parties centrales 1 et 2 dont l'une est mobile axialement par rapport à l'autre et conformées de façon à ménager entre elles, lorsqu'elles sont appuyées l'une contre   l'autre,    un espace annulaire dont la section correspond à l'ensemble du profil de la jante voulue 3 et du profil du segment 4.



   Ce segment, construit par exemple en acier, est divisé par une ou plusieurs fentes 5 (fig. 2 et 4) et a, de préférence, à l'état libre, tendance à s'ouvrir de lui-même. Ses extrémités se trouvent maintenues l'une contre l'autre lorsqu'il est encastré dans la partie 1 du moule.



   Afin de ménager dans la jante moulée les trous destinés à la fixation des rayons, une série de noyaux 6 sont fixés dans le segment 4, de   distance    en distance; ces noyaux ont une portion sphérique 6a de façon à former des surfaces d'appui sphériques pour les écrous des rayons qui s'engagent dans les trous réalisés dans la jante par ces noyaux; un noyau 7 est, en outre, prévu pour ménager le passage de la valve de la chambre à air. Ces noyaux sont de préférence constitués par des vis dont la pointe a une forme correspondant à celle des trous voulus, et dont la tête est encastrée dans la périphérie du segment.



   Ce dernier présente des rebords 8 s'étendant au-delà des bords de la jante et   s'enga-    geant dans des évidements correspondants des parties de moule 1 et 2.



   La matière plastique qu'il s'agit de mouler, par exemple une résine synthétique mélangée au besoin avec un liant, un colorant, une charge textile en vrac, de la poudre à choc, et toutes autres substances appropriées, est placée à l'état de poudre ou d'agglomérés dans la partie inférieure du moule 1, alors que la partie 2 est soulevée, ou bien elle est in  jectée    sous pression dans l'espace annulaire formé par les deux parties 1 et 2 serrées l'une contre l'autre.



   Une fois le moulage sous pression effectué et la matière plastique convenablement durcie, on retire du moule l'ensemble du segment 4 et de la jante moulée 3.



   Pour séparer facilement ces deux éléments   l'un    de l'autre, on place l'ensemble sur un support circulaire 9 (fig. 3, 4) dont le pourtour est conformé de façon que les portions inférieure et interne de cet ensemble s'y ajustent, tandis que le rebord supérieur 8 du segment fait saillie au-dessus du support. Au centre de ce dernier est monté le pivot 10 d'un bras 11 auquel est articulé un levier de manoeuvre 12; sur ce dernier est monté un galet 13 qui peut tourner librement à faible distance au-dessus du support 9 et dont le pourtour peut être appuyé du dedans vers le dehors contre le rebord saillant 8 du segment 4.



   En faisant rouler ce galet au contact du segment, il est facile de séparer ce dernier  de la jante 3 qui reste immobile sur le support 9. Celui-ci peut être fixe, ou préférablement être monté pivotant sur un bâti fixe 14, afin d'éviter un déplacement de l'opérateur autour du support 9.



   Lorsqu'on met en place la matière plastique dans le moule, il est possible de lui incorporer une bande tissée ou tressée à larges mailles ou en  nid   d'abeilles ,    en toute matière fibreuse appropriée; eette bande peut être   faeonnée,    par esemple, sous la forme d'un tube à section aplatie et enroulée au diamètre de la jante 3.



   Dans la variante représentée aux fig. 7 et 8, destinée à la réalisation d'une jante de roue de bicyclette à boyau dont la légèreté ne doit nuire ni à la rigidité, ni à la solidité, et constituée à cet effet d'une pellicule de matière moulée de quelques millimètres d'épaisseur seulement, on a prévu toute une série de languettes 29 raccordées par le fond 30; seul le trou 22, avec sa surface d'appui sphérique 23, est ménagé dans une partie pleine 31. Ces languettes offrent, en outre, l'avantage d'assurer une meilleure adhérence du boyau qui s'incruste entre les languettes.



   Une jante prête à recevoir immédiatement des rayons servant à l'assembler à un moyeu peut ainsi être obtenue très économiquement, et permet de réaliser avec un minimum de   main-d'ceuvre    une roue de bicyclette exempte des inconvénients que présentent les jantes en bois et les jantes métalliques connues.



   REVENDICATIONS:
 I. Procédé pour la fabrication d'une jante   creuse    en matière plastique moulée, destinée à recevoir un bandage élastique, caractérisé en   ee    que la matière moulée est comprimée dans un moule et en ce que le démoulage de la partie   e. xtérieure    concave de la jante se fait en chassant vers l'extérieur l'élément de moule qui a conformé cette partie.
  



  
 



  Process for the production of a molded plastic hollow rim
 and mold for implementing this method.



     This invention relates to the manufacture of hollow rims for receiving a pneumatic or solid elastic tire, for wheels of bicycles, baby carriages, etc., by molding a suitable plastic material, such as for example a synthetic resin. , with optional incorporation of a suitable textile or cellulosic material.



   The manufacturing process according to the invention is characterized in that the molded material is compressed in a mold and in that the demolding of the conclave outer part of the rim is carried out by driving out the mold element which has conformed this part.



   A subject of the invention is also a mold for implementing this method.



  This mold can be arranged to obtain perforated rims, that is to say the holes for fixing the spokes are formed in the same mold where the plastic material takes the form of a hollow rim. This mold can also, with certain modifications, allow the direct manufacture of wheels whose spokes and the hub are formed integrally with the hollow rim.



   The mold according to the invention is characterized in that its peripheral part is formed by at least one segment, the section of which has on its internal side a shape corresponding to the concave profile of the periphery of the rim and in that it comprises means intended to drive out said peripheral part.



   A series of projections or cores suitable for forming in the rim, during molding, the holes intended to receive the spokes, in the case of bicycle wheels or the like, may or may not be fixed in a removable manner on the aforementioned segment. .



   These holes preferably have a spherical bearing surface on which the heads of the spoke fixing nuts find a stable bearing whatever their inclination.



   The release of the segment (s) can be obtained by hand or mechanically and be facilitated by the elasticity of the segment if the latter has a greater radius of curvature when it is in the free state than when it is clamped around central parts of the mold.



   A mechanical device can be provided to produce this release of the molding segment with ease despite the adhesion which may be due to the nature of the plastic material used and the insertion of the cores in this material. This device can comprise a support, on which places the whole of the molded rim and the segment which surrounds it, and a lever which is articulated on an arm itself articulated around the center of this support and on which a roller is mounted so as to be able to be supported from the inside out against the edge of the segment protruding on one side of the rim.

     It suffices to operate this lever so as to cause the roller to roll against the edge of the segment with sufficient pressure to move the latter away from the plastic rim.



   Finally, the invention relates to a hollow molded plastic rim intended to receive an elastic tire, characterized in that it has holes which are molded with the rim for fixing the spokes.



   The accompanying drawing shows, by way of example, an embodiment of the mold according to the invention, as well as a model of the rim which can be produced with this mold.



   Fig. i is a partial vertical section of a mold.



   Fig. 2 shows in perspective a portion of the molding segment.



   Fig. 3 is a vertical section of a mechanical device for extracting the segment from the rim.



   Fig. 4 is a plan of this device.



   Figs. 5 and 6 show in elevation and in cross section a portion of a wide mesh band made of fibrous material and snseeptible to be incorporated into the plastic material of the rim, during letting.



   Figs. 7 and 8 respectively show, seen from the outside and in cross section, an alternative embodiment of a rim according to the invention.



   The mold comprises two central parts 1 and 2, one of which is movable axially with respect to the other and shaped so as to leave between them, when they are pressed against each other, an annular space whose section corresponds to the entire profile of the desired rim 3 and the profile of segment 4.



   This segment, constructed for example of steel, is divided by one or more slots 5 (FIGS. 2 and 4) and has, preferably, in the free state, a tendency to open by itself. Its ends are held against each other when it is embedded in part 1 of the mold.



   In order to provide the holes in the molded rim for fixing the spokes, a series of cores 6 are fixed in the segment 4, from distance to distance; these cores have a spherical portion 6a so as to form spherical bearing surfaces for the nipples of the spokes which engage in the holes made in the rim by these cores; a core 7 is, moreover, provided to spare the passage of the valve of the air chamber. These cores are preferably formed by screws, the tip of which has a shape corresponding to that of the desired holes, and the head of which is embedded in the periphery of the segment.



   The latter has flanges 8 extending beyond the edges of the rim and engaging in corresponding recesses of the mold parts 1 and 2.



   The plastic material to be molded, for example a synthetic resin mixed if necessary with a binder, a dye, a bulk textile filler, impact powder, and all other suitable substances, is placed in the state of powder or agglomerates in the lower part of the mold 1, while part 2 is lifted, or else it is injected under pressure into the annular space formed by the two parts 1 and 2 pressed against each other. 'other.



   Once the die-casting has been carried out and the plastic material has properly hardened, the entire segment 4 and the molded rim 3 are removed from the mold.



   To easily separate these two elements from one another, the assembly is placed on a circular support 9 (fig. 3, 4), the periphery of which is shaped so that the lower and internal portions of this assembly are there. fit, while the top rim 8 of the segment protrudes above the support. In the center of the latter is mounted the pivot 10 of an arm 11 to which an operating lever 12 is articulated; on the latter is mounted a roller 13 which can rotate freely at a small distance above the support 9 and whose periphery can be pressed from the inside outwards against the projecting rim 8 of the segment 4.



   By rolling this roller in contact with the segment, it is easy to separate the latter from the rim 3 which remains stationary on the support 9. The latter can be fixed, or preferably be mounted to pivot on a fixed frame 14, in order to avoid the operator moving around the support 9.



   When placing the plastic material in the mold, it is possible to incorporate a woven or braided strip with wide mesh or honeycomb in any suitable fibrous material; This strip can be shaped, for example, in the form of a tube with a flattened section and wound to the diameter of the rim 3.



   In the variant shown in FIGS. 7 and 8, intended for the production of a tubular bicycle wheel rim, the lightness of which must not adversely affect either the rigidity or the solidity, and constituted for this purpose of a film of molded material a few millimeters thick. 'thickness only, a whole series of tabs 29 connected by the bottom 30 have been provided; only the hole 22, with its spherical bearing surface 23, is made in a solid part 31. These tongues also offer the advantage of ensuring better adhesion of the hose which becomes embedded between the tongues.



   A rim ready to receive immediately the spokes used to assemble it to a hub can thus be obtained very economically, and makes it possible to produce with a minimum of labor a bicycle wheel free from the disadvantages of wooden rims and known metal rims.



   CLAIMS:
 I. Process for the manufacture of a molded plastic hollow rim, intended to receive an elastic tire, characterized in that the molded material is compressed in a mold and in that the demolding of the part e. The concave exterior of the rim is effected by driving out the mold element which has shaped this part.

Claims (1)

II. Moule pour la mise en oeuvi'e du procédé selon la revendication I, caractérisé en ce que sa partie périphérique est constituée par au moins un segment dont la section présente sur son côté interne une forme correspondant au profil concave de la périphérie de la jante et en ce qu'il comprend des moyens destinés à chasser vers l'extérieur ladite partie périphérique. II. Mold for carrying out the process according to Claim I, characterized in that its peripheral part is formed by at least one segment, the section of which has on its internal side a shape corresponding to the concave profile of the periphery of the rim and in that it comprises means intended to drive out said peripheral part. III. Jante creuse en matière plastique moulée, destinée à reeevo, ir un bandage élastique, obtenue par le procédé selon la revendication I, caractérisée en ce qu'elle présente des trous venus de moulage avec la jante pour la fixation des rayons. III. Hollow rim in molded plastic material, intended for reeevo, ir an elastic tire, obtained by the method according to claim 1, characterized in that it has holes molded with the rim for fixing the spokes. SOUS-REVENDICATIONS : 1. Procédé suivant la revendication I, ca ractérisé en ce qu'une bande de matière fibreuse à mailles larges est incorporée dans la matière plastique placée dans le moule. SUB-CLAIMS: 1. A method according to claim I, characterized in that a web of wide-meshed fibrous material is incorporated into the plastic material placed in the mold. 2. Procédé suivant la revendication I, caractérisé en ce que des trous destinés à recevoir les écrous de fixation des rayons sont venus au moulage avec la jante. 2. Method according to claim I, characterized in that the holes for receiving the spoke fixing nuts are molded with the rim. 3. Moule suivant la revendication II, caractérisé en ce que sa partie périphérique est munie de noyaux propres à ménager dans la jante, lors du moulage, des trous pour la fixation des rayons. 3. Mold according to claim II, characterized in that its peripheral part is provided with cores suitable for forming in the rim, during molding, holes for fixing the spokes. 4. Moule suivant la sous-revendication 3, caractérisé en ce que les noyaux ont une partie sphérique destinée à créer dans la jante une surface d'appui sphérique pour les écrous de fixation des rayons. 4. Mold according to sub-claim 3, characterized in that the cores have a spherical part intended to create in the rim a spherical bearing surface for the spoke fixing nuts. 5. Jante suivant la revendication III, caractérisée en ce qu'elle est formée de languettes longitudinales réunies à leur base. 5. Rim according to claim III, characterized in that it is formed of longitudinal tongues joined together at their base.
CH278347D 1948-02-05 1949-01-22 Process for the manufacture of a hollow molded plastic rim and mold for implementing this process. CH278347A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
FR278347X 1948-02-05
US37713264A 1964-06-22 1964-06-22
US46081265A 1965-06-02 1965-06-02
US460820A US3419598A (en) 1964-06-22 1965-06-02 Derivatives of bicyclo[2.2.2]oct-2-ene and process of preparation
US467705A US3367941A (en) 1965-06-28 1965-06-28 4-pyridyl and 4-substituted pyridylbicyclo-[2.2.2]octane-1-amines

Publications (1)

Publication Number Publication Date
CH278347A true CH278347A (en) 1951-10-15

Family

ID=27515334

Family Applications (1)

Application Number Title Priority Date Filing Date
CH278347D CH278347A (en) 1948-02-05 1949-01-22 Process for the manufacture of a hollow molded plastic rim and mold for implementing this process.

Country Status (5)

Country Link
BE (1) BE487015A (en)
CH (1) CH278347A (en)
DE (1) DE815105C (en)
FR (1) FR962307A (en)
NL (1) NL72360C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1264042B (en) * 1961-03-04 1968-03-21 Voith Gmbh J M Mold for the production of blade wheels from fiber-reinforced plastic

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1264042B (en) * 1961-03-04 1968-03-21 Voith Gmbh J M Mold for the production of blade wheels from fiber-reinforced plastic

Also Published As

Publication number Publication date
NL72360C (en)
DE815105C (en) 1951-09-27
FR962307A (en) 1950-06-07
BE487015A (en)

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