Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B22—CASTING; POWDER METALLURGY
  • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
  • B22D19/00—Casting in, on, or around objects which form part of the product
  • B22D19/04—Casting in, on, or around objects which form part of the product for joining parts
  • B22D19/045—Casting in, on, or around objects which form part of the product for joining parts for joining tubes
• • 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
  • B29C45/14598—Coating tubular articles
  • B29C45/14614—Joining tubular articles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
  • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
  • B62K19/00—Cycle frames
  • B62K19/18—Joints between frame members
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
  • Y10T29/49988—Metal casting

Definitions

• the invention relates to connections of parts of bicycle frames or forks made from pipes, in particular steering head, bottom bracket, saddle head and center connections, at least one first pipe with its shaped end section with the outer jacket of a second pipe by overmolded material is connected, and a method for producing the same.
• the object of the invention is to provide connections of the type mentioned at the outset and a method for producing such connections in which the aforementioned disadvantages are avoided and in particular the possibility is given of both steel and / or aluminum pipes and pipe sections made of plastic to be used for the bicycle frame, thereby reducing the weight of such frames or racks in particular, while at the same time avoiding the time-consuming and energy-intensive connection of the individual frame parts by overmolding in the metal casting process, but in particular the associated high injection and soldering temperatures should.
• the widened end sections of the respective tubes are glued to the outer jackets of the adjoining tubes.
• the tubes are advantageously made of metal, but the tubes forming the frame can also be made in particular of plastic.
• the use of plastic pipes ⁇ is also made possible by the low manufacturing temperature.
• the rear end with its connecting ends on the bottom bracket and on the saddle is also incorporated into the extrusion-molded coatings.
• the above-mentioned object of creating a method suitable for producing such connections is achieved in that in such a method the end sections of the tubes are widened and adapted to the outer sheaths of the respective other tubes, so that the tubes are then cut to a predetermined length and arrangement placed or placed in a spraying device with respect to one another and that the pipes are overmolded with plastic at the connection points.
• edges of the widened end sections of the first tubes which meet the outer jackets of the other tubes are provided with a suitable adhesive, are pressed to adhere to the outer jackets, and the tubes are then injected with plastic at the connection points.
• the aforementioned method according to the invention allows considerable time and energy costs to be saved, but in particular it makes the painting process of bicycle frames easier, since the individual frame parts, in particular those made of metal, can be finally painted before the connections are made.
• Fig. 3 shows a longitudinal section through the bottom bracket
• Fig. 4 is a plan view according to IV in Fig. 3 on the bottom bracket, but omitting the connecting sleeve and the rear triangle.
• the frame tubes namely the top tube 1, down tube 3 and saddle tube 5 are cut to their predetermined lengths and at their open end sections 6 * -6 '', 7 '7 11 and 8 expanded.
• the components mentioned above are together with the control tube 2 and bottom bracket tube 4 in the configuration of the Bicycle frame to be produced is inserted or inserted into a plastic spraying device, the widened end sections 6 ', 6' 1 , 7 ', 7''and8' of the frame tubes 1, 3 and 5 being in contact with the outer shells of the control tube 2, the bottom bracket tube 4 or the seat tube 5.
• the pipes can also be glued to each other for increasing stability.
• the top tube 1 is formed so that its end section 6 ,! is not connected to the seat tube 5 directly below the saddle, as in the men's bicycle frame shown in the figures, but the connection is arranged closer to the bottom bracket tube 4 as a so-called center connection.
• the rear wheel 15 receiving the rear wheel of a bicycle is simultaneously through with the frame tubes 1, 3 and 5 in the saddle head 11 and in the bottom bracket head 10 the plastic encapsulation integrated.
• the plastic extrusions are designated in the figures with reference numerals 12, 13 and 14.
• the plastic extrusion coating at the connection points described takes place within a plastic injection device, which is particularly adapted to the configuration of a bicycle frame, in a manner known from plastic technology.

Landscapes

• Mechanical Engineering (AREA)
• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Motorcycle And Bicycle Frame (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)
• Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
• Steering Devices For Bicycles And Motorcycles (AREA)
• Electroluminescent Light Sources (AREA)
• Ultra Sonic Daignosis Equipment (AREA)
• Mutual Connection Of Rods And Tubes (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)
• Silicon Compounds (AREA)
• Flanged Joints, Insulating Joints, And Other Joints (AREA)
• Excavating Of Shafts Or Tunnels (AREA)
• Supports For Pipes And Cables (AREA)
• Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
• Automatic Cycles, And Cycles In General (AREA)
• Information Retrieval, Db Structures And Fs Structures Therefor (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6146263

Family Applications (1)

Country Status (12)

Cited By (1)

Families Citing this family (34)

Citations (6)

Family Cites Families (5)

• 1981
  • 1981-11-12 DE DE3145002A patent/DE3145002C2/de not_active Expired
• 1982
  • 1982-11-10 EP EP82110367A patent/EP0079575B1/de not_active Expired
  • 1982-11-10 DE DE8282110367T patent/DE3274094D1/de not_active Expired
  • 1982-11-10 AT AT82110367T patent/ATE23306T1/de not_active IP Right Cessation
  • 1982-11-10 CA CA000415311A patent/CA1196662A/en not_active Expired
  • 1982-11-11 JP JP57503500A patent/JPS58501904A/ja active Pending
  • 1982-11-11 WO PCT/DE1982/000216 patent/WO1983001763A1/en active IP Right Grant
  • 1982-11-11 US US06/515,054 patent/US4541649A/en not_active Expired - Fee Related
  • 1982-11-12 YU YU02538/82A patent/YU253882A/xx unknown
  • 1982-11-16 IN IN1337/CAL/82A patent/IN157082B/en unknown
• 1983
  • 1983-07-01 DK DK305883A patent/DK153313C/da not_active IP Right Cessation
  • 1983-07-11 SU SU833615546A patent/SU1210660A3/ru active
  • 1983-07-11 FI FI832525A patent/FI75770C/fi not_active IP Right Cessation

Patent Citations (6)

Also Published As

Similar Documents

Legal Events