DE815105C - Form zur Herstellung von Hohlfelgen aus waermehaertbarem Kunstharz und Radfelge - Google Patents

Form zur Herstellung von Hohlfelgen aus waermehaertbarem Kunstharz und Radfelge

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Publication number
DE815105C
DE815105C DEP32853D DEP0032853D DE815105C DE 815105 C DE815105 C DE 815105C DE P32853 D DEP32853 D DE P32853D DE P0032853 D DEP0032853 D DE P0032853D DE 815105 C DE815105 C DE 815105C
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DE
Germany
Prior art keywords
mold
rims
rim
ring
synthetic resin
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.)
Expired
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DEP32853D
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English (en)
Inventor
Paul Villeple
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.)
Valeo SE
Original Assignee
Francaise du Ferodo SA
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Filing date
Publication date
Application filed by Francaise du Ferodo SA filed Critical Francaise du Ferodo SA
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Publication of DE815105C publication Critical patent/DE815105C/de
Priority claimed from US460820A external-priority patent/US3419598A/en
Priority claimed from US467705A external-priority patent/US3367941A/en
Expired legal-status Critical Current

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    • 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

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

Description

  • Form zur Herstellung von Hohlfelgen aus wärmehärtbarem Kunstharz und Radfelge Die Erfindung bezieht sich auf eine Form zur Herstellung von Hohlfelgen aus wärmehärtbarem Kunstharz zur Aufnahme eines elastischen Luft-oder Vollreifens für Fahrräder, Kinderwagen o. dgl.
  • Es ist bereits bekannt, zur Herstellung von (;egenständen eine Kunstharzmischung, gegebenenfalls mit textilen Verstärkungseinlagen, in Formen zu pressen. Zur Herstellung von Löchern ist die .nwendung von Kernen nicht mehr neu.
  • Aufgabe der Erfindung ist es, eine zur Herstellung von Hohlfelgen geeignete Form auszubilden, die nach der Beendigung des Formvorganges leicht wieder abgenommen werden kann.
  • Zu diesenl Zweck besteht der Umfangsteil der Form aus einem biegsamen Ring, dessen Querschnitt auf der Innenseite die Gestalt des Hohlprofils der Felge aufweist, und an dem abnehmbare oder nicht abnehmbare Vorsprünge oder Kerne befestigt sind, die beim Formen der Felge in üblicher Weise die zur Aufnahme der Speichen dienenden Löcher bilden sollen, wenn es sich um Fahrradräder o. dgl. handelt.
  • Diese Löcher besitzen vorzugsweise einen kugelförmigen Boden, der den Köpfen der Befestigungsmuttern der Speichen bei jeder Neigung der letzteren eine gute Stützfläche bietet.
  • Der Ring ist an einer oder an mehreren Stellen des Umfanges geteilt, um von der Felge abgenommen werden zu können. Das Abnehmen kann von Hand oder mechanisch geschehen und wird durch die Federung des Ringes erleichtert, wenn der Krümmungsradius in der Nichtgebrauchslage größer ist, als wenn der Ring um den mittleren Teil der Form gespannt ist.
  • Zum leichten mechanischen Abnehmen des Formringes trotz des Anhaftens, das sich aus der Beschaffenheit des vorübergehend plastischen Werkstoffes und dem Eindringen der Kerne in diesen Werkstoff ergeben kann, besteht die Vorrichtung aus einem Halter, der die geformte Felge und den diese umgebenden Ring sowie einen Hebel aufnimmt, der gelenkig an einem Arm angreift, welcher selbst in der Mitte des Halters gelagert ist.
  • Auf dem Hebel ist eine Rolle derart gelagert, daß sie von innen nach außen gegen den auf einer Seite der Felge vorstehenden Rand des Ringes gedrückt werden kann. Es genügt, den Hebel derart zu schwenken, daß die Rolle sich auf dem Rand des Ringes mit einem genügenden Druck abwälzt, um diesen Ring von der Felge abzuheben.
  • Die Zeichnung veranschaulicht beispielsweise eine Ausführung der Form und der erfindungsgemäßen Vorrichtung zum Entformen, und zwar stellen dar: Fig. 1 einen lotrechten Teilschnitt durch die Form, Fig. 2 schaubildlich ein Stück des Formringes, Fig. 3 einen lotrechten Schnitt durch die Vorrichtung zum Abnehmen des Formringes von der Felge, Fig. 4 eine Draufsicht dieser Vorrichtung, Fig. 5 und 6 jeweils eine Ansicht auf den äußeren Umfang und einen Querschnitt einer anderen Ausführung der Felge gemäß der Erfindung.
  • Die Form besteht aus zwei mittleren Teilen I und 2, von denen der eine axial verschiebbar ist.
  • Beide Teile sind derart ausgebildet, daß sie zusammen einen ringförmigen Raum bilden, der dem Profil der Hohl felge 3 und demjenigen des Formringes 4 entspricht.
  • Dieser Formring, der z. B. aus Stahl besteht, ist durch einen oder mehrere Schlitze 5 (Fig. 2 und 4) geteilt. Im freien Zustand hat er vorzugsweise das Bestreben, sich selbsttätig zu öffnen. Die Enden werden miteinander in Berührung gehalten, wenn der Ring in den Teil I der Form eingesetzt ist.
  • Zur Herstellung der zur Befestigung der Radspeichen dienenden Löcher in der geformten Felge sind am Formring 4 in bestimmten Abständen Kerne 6 befestigt. Diese Kerne sind mit einem kugelfirmigen Schulteransatz 6« versehen, die auf dem Boden der Löcher kugelförmige Stützflächen für die Speichenmuttern bilden, die von außen in die von den Kernen gebildeten Löcher der Felge eingesetzt werden. Ein weiterer Kern 7 ist zur Herstellung des Loches für den Durchgang des \'ventils des Luftschlauches vorgesehen. Die Kerne bestehen vorzugsweise aus Schrauben, deren Spitze die Gestalt der herzustellenden Löcher hat und deren Kopf in den äußeren Umfang des Formringes eingelassen ist.
  • Letzterer ist mit Flanschen 8 versehen, die sich über die Seitenränder der Felge hinaus erstrecken und in entsprechende Aussparungen der Formteile I und 2 eingreifen.
  • Das zu formende Kunstharz ist gegebenenfalls mit einem Bindemittel, Farb- und Faserstoffen oder sonstigen Füllstoffen gemischt. Dieser Werkstoff wird in Gestalt eines Pulvers bei abgenommenem Oberteil 2 in den Unterteil I der Form eingebracht. Er kann auch unter Druck in den Ringraum zwischen den beiden Teilen I und 2 eingespritzt werden.
  • Nach dem Formen unter Druck und dem Erhärten der Kunstharzmischung wird der Formring 4 mit der geformten Felge 3 aus der Form gehoben.
  • Zum leichten Trennen dieser beiden Teile bringt man das Ganze auf einen kreisförmigen Halter 9 (Fig. 3 und 4), dessen Umfang derart ausgebildet ist, daß die Unterseite des Ringes und der Felge sich diesem Halter genau anpassen, wogegen der obere Flansch 8 des Formringes über den Halter vorsteht. In der Mitte dieses letzteren ist der Drehzapfen 10 eines Armes II vorgesehen, an dem ein Hebel I2 gelenkig angreift. An diesem Hebel ist eine Rolle I3 gelagert, die sich in geringer Höhe über dem Halter 9 lose drehen und deren Umfang von innen nach außen gegen den vorstehenden Flansch 8 des Formringes 4 gedrückt werden kann.
  • Durch Abwälzen der Rolle auf der Innenseite des Formringes kann dieser leicht von der Felge 3 getrennt werden, die am Halter g festsitzen bleibt.
  • Dieser kann feststehen, er ist aber vorzugsweise drehbar auf einem feststehenden Gestell 14 gelagert, damit der Bedienende den Halter g nicht zu umgehen hat.
  • Beim Einbringen der Kunstharzmischung in die Form kann man in diesen Werkstoff ein gewebtes oder geflochtenes Band mit breiten Maschen, wie an sich bekannt, oder auch ein wabenförmiges Band aus einem Faserstoff, insbesondere aber aus Polyamiden, einbetten. Das Band kann beispielsweise einen flachgedrückten Rohrquerschnitt haben und ist dem Durchmesser der Felge entsprechend geschlossen.
  • Bei der Ausführung gemäß den Fig. 5 und 6, die als Felge für ein Fahrrad mit Luftschläuchen dienen soll, also leicht und trotzdem starr und fest sein muß, und zu diesem Zweck aus einer geformten Werkstoffschicht von nur einigen Millimetern besteht, sind mehrere Rippen 29 vorgesehen, die durch den Boden 30 miteinander zusammenhängen. Nur das Loch 22 mit seinem kugeligen Boden 23 befindet sich in einem vollen Teil 3I. Die Rippen bieten ferner den Vorteil, daß sie das Haften des Luftschlauches verbessern, weil dieser dann zwischen die Rippen greift.
  • Man kann auf diese Weise mit wenigen Kosten eine Felge herstellen, die sofort zur Aufnahme der Radspeichen für die Verbindung mit der Radnabe dienen kann. Diese Felge gestattet ebenfalls mit sehr geringer Handarbeit die Herstellung eines Rades für Fahrräder, dem die bekannten Nach- teile der Holzfelgen und der Metallfelgen nicht anllaften.
  • PhTENTANSPROCHE: 1. Form zur Herstellung von Hohlfelgen aus wiirmehärtbarem Kunstharz zur Aufnahme einer elastischen Bereifung, dadurch gekennzeichnet, daß der Umfangsteil dieser Form aus einem biegsamen Formring (4) besteht, dessen Querschnitt auf der Innenseite die Gestalt des Hohlprofils der Felge aufweist und daß dieser Formring durch einen Hebel (12) 0. dgl. von innen nach außen gedrückt und dadurch von der Felge abgehoben wird.
  • Form nach Anspruch I mit Kernen zur Herstellung von gelochten Felgen, dadurch gekennzeichnet, daß die in der Umfangsrichtung am Formring angebrachten Kerne (6) mit einem kugeligen Schulteransatz (6a) versehen sind.

Claims (1)

  1. 3. Radfelge aus wärmehärtbarem Kunstharz mit einem Hohlprofil zur Aufnahme eines elastischen Radreifens, hergestellt mit einer Form nach Anspruch I, dadurch gekennzeichnet, daß sie mit Löchern zur Aufnahme der Befestigungsmuttern der Radspeichen versehen ist, die eine kugelförmige Stützfläche haben.
    4. Radfelge nach Anspruch 3, dadurch gekennzeichnet, daß sie Längsrippen (29) aufweist, die am Boden (30) miteinander verbunden sind.
DEP32853D 1948-02-05 1949-02-01 Form zur Herstellung von Hohlfelgen aus waermehaertbarem Kunstharz und Radfelge Expired DE815105C (de)

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

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DE815105C true DE815105C (de) 1951-09-27

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BE (1) BE487015A (de)
CH (1) CH278347A (de)
DE (1) DE815105C (de)
FR (1) FR962307A (de)
NL (1) NL72360C (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1264042B (de) * 1961-03-04 1968-03-21 Voith Gmbh J M Form zum Herstellen von Schaufelraedern aus faserverstaerktem Kunststoff

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BE487015A (de)
FR962307A (de) 1950-06-07
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