EP4363187A1 - Procédé de fabrication d'une fourche pour un véhicule à deux roues - Google Patents

Procédé de fabrication d'une fourche pour un véhicule à deux roues

Info

Publication number
EP4363187A1
EP4363187A1 EP23738672.7A EP23738672A EP4363187A1 EP 4363187 A1 EP4363187 A1 EP 4363187A1 EP 23738672 A EP23738672 A EP 23738672A EP 4363187 A1 EP4363187 A1 EP 4363187A1
Authority
EP
European Patent Office
Prior art keywords
fork
injection molding
molding tool
cavity
fluid
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP23738672.7A
Other languages
German (de)
English (en)
Inventor
Umut Cakmak
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.)
Plastic Innovation GmbH
Original Assignee
Plastic Innovation GmbH
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 Plastic Innovation GmbH filed Critical Plastic Innovation GmbH
Publication of EP4363187A1 publication Critical patent/EP4363187A1/fr
Pending legal-status Critical Current

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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1711—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow 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
    • B62K21/00—Steering devices
    • B62K21/02—Front wheel forks or equivalent, e.g. single tine
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1711—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity
    • B29C2045/1712—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity plastic material flowing back into the injection unit
    • 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
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
    • B29C45/1711—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity
    • B29C2045/1713—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles and removing excess material from the mould cavity by the introduced fluid, e.g. to an overflow cavity using several overflow cavities
    • 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
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • 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
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3091—Bicycles

Definitions

  • the invention relates to a method for producing a fork made of thermoplastic material that has at least one cavity inside and is intended for a two-wheeler.
  • a two-wheeler in the sense of the invention can mean, on the one hand, a conventional bicycle or an electric bicycle.
  • a two-wheeler also means a motorized two-wheeler such as a moped, moped, motorcycle as well as motorized and electric scooters.
  • thermoset plastics It is already known to produce components for two-wheelers from thermoset plastics.
  • a resin injection process known as “Resin Transfer Molding” (RTM) is usually used.
  • RTM Resin Transfer Molding
  • glass and/or carbon fiber fabrics are inserted into a shaping tool. With the tool closed, the tissue is soaked with a thermoset matrix material such as an epoxy resin or polyurethane, which is injected into the tool.
  • the thermoset matrix materials usually consist of two basic substances, which must be mixed well before being introduced into the tool. After mixing and injection into the tool, a chemical reaction occurs. After the reactances have been implemented accordingly, the component can be removed from the mold.
  • the glass or carbon fiber fabrics are usually arranged in the tool in a three-dimensionally woven state.
  • thermoset matrix material is not only associated with relatively high production costs, but also with the major disadvantage that thermoset materials cannot be recycled sensibly. Apart from thermal utilization through burning, i.e. H. As an energy source, there is no reasonable recycling of plastic components made from thermoset matrix material.
  • thermoplastics can be melted, formed and deformed several times.
  • the present invention is therefore based on the object of providing a reliable method with which a two-wheel fork can be manufactured entirely from a thermoplastic that meets safety-related requirements and is easily recyclable.
  • a method for producing a fork (tube geometry) having at least one cavity inside is made of thermoplastic for a two-wheeler by means of plastic injection molding and fluid injection according to the features of claim 1, with preferred embodiments being the subject of the subclaims.
  • the fluid used is water or gas.
  • it can also consist of both media, as there is often an air bubble, for example is pushed ahead of the water or whereby nitrogen is first used to form cavities and then CO2 is used to cool the manufactured component.
  • a cavity of the closed injection molding tool forms the geometry of the later component, with a wheel fork being provided for a two-wheeler according to the invention.
  • the injection molding tool is equipped with at least one injector for introducing a fluid.
  • the fluid displaces the plastic core from the interior of the fork, thereby forming a cavity which has, for example, a tubular cross section.
  • the fluid can be injected using a preset profile, controlled by volume flow or pressure/time. Due to the tubular cross section, the cooling phase of the hot plastic melt can be significantly shortened due to the comparatively thin remaining wall thickness. This means that only a comparatively short cooling time is required.
  • the method according to the invention is characterized by a very significant reduction in cooling time compared to methods for producing components from solid material. Due to the advantageous reduction in cooling time, the process time for producing a two-wheel fork can be significantly reduced, which means that the production of a two-wheel fork using the method according to the invention is overall more cost-effective compared to conventional manufacturing processes.
  • the cavity inside the fork reduces the mass of the two-wheeler, which not only has a weight advantage, but in particular an economic advantage.
  • a closed tubular fork cross section also results in greater rigidity. If we are talking about a tubular cross-section, it can of course be circular, oval, polygonal and in any other shape.
  • the fork is made from at least one reinforced and/or unreinforced thermoplastic.
  • a plastic is used which is selected from the following group: polyamide, preferably polyamide 12, polyamide 6 or polyamide 6.6, polypropylene, polyethylene, polyethersulfone, polyetherimide, polyether ketone, polyphenylene sulfide, polyvinyl chloride, polyester, acrylonitrile butadiene Styrene (ABS), polycarbonate/acrylonitrile-butadiene-styrene (ABC/PC), polycarbonate (PC), polyethylene terephthalate (PET) and particularly preferably polybutylene terephthalate or.
  • plastics can be selected and used individually or in combination.
  • the selected plastics can also be reinforced using short and/or long fibers made of glass, carbon and/or natural fibers.
  • the plastic can also be injected into the injection molding tool as caprolactam with an associated activator and polymerized in the heated tool.
  • the fork consisting of the thermoplastic matrix material can be easily recycled and therefore enables reusability.
  • the fork is secured by means of unidirectional tapes and/or organosheets (design and/or functional film and/or tape made of carbon or glass fiber fabric) arranged in the injection molding tool, with a cohesive connection with the thermoplastic melt is created, is additionally reinforced.
  • At least one overflow cavity introduced into the injection molding tool can be provided to form a cavity inside the fork, into which at least one fluid volume flow of the injected fluid presses the plastic core.
  • the fork is produced by the so-called mass push-back process, with the at least one fluid volume flow of the injected fluid displacing the plastic core through a channel back into the screw anteroom of the injection molding machine, and wherein the fluid is injected on the side of the fork opposite the corresponding injection point of the melt.
  • the at least one shaping cavity introduced into the injection molding tool is only partially filled with the thermoplastic melt and the plastic core is displaced to form a cavity by the at least one fluid volume flow of the injected fluid, the plastic melt being inflated in such a way to displace it, that it rests against the wall of the injection molding tool. Nevertheless, the injected fluid ensures that the cavity arranged in the injection molding tool is completely filled. Inflating the melt in turn enables very economical use of the thermoplastic material available for producing the fork.
  • the fluid injected into the fork pushes a projectile arranged on an injector in front of it, the projectile producing a constant inside diameter over a certain length of the fork.
  • additional shaping component cavities can be used in order to produce any component geometries.
  • an additional tubular insert part to be encapsulated is inserted into an area of the injection molding tool that forms a fork shaft. In this way, the strength in the shaft area of the fork can be significantly increased.
  • the fork shaft can be reinforced by arranging unidirectional tapes and/or organosheets partially or over a large area on the insert before injecting the plastic melt, so that a cohesive connection is created with the thermoplastic melt.
  • the tapes and/or organosheets can be particularly advantageously preheated to a specific temperature before being inserted into the tool, with this specific temperature being selected depending on the matrix material of the tape.
  • the tapes and/or organosheets can be placed and held in the tool by a special device, for example.
  • a special device for example.
  • the stiffness can be increased, especially in critical areas of the component.
  • the insert is made of the same thermoplastic material as the rest of the fork.
  • grooves, elevations and/or certain contours are formed on the inner wall of the insert, whereby a cohesive connection with increased rigidity and damage tolerance is created between the insert and the plastic melt when the plastic melt is injected.
  • At least one flow channel is provided on the underside of the insert, through which the plastic melt flows into the interior of the insert, with the at least one flow channel being formed on the longitudinal side of the insert.
  • Yet another advantageous embodiment of the invention provides that the insert part and the injection molding tool each optionally have at least one positioning aid.
  • At least one metallic component to be integrated and/or a non-metallic component such as pultruded braided or wound fiber elements is inserted individually or in groups into the cavity of the injection molding tool and is back-injected and/or encapsulated with the plastic melt becomes.
  • the at least one component to be integrated is a threaded sleeve, a screw-in sleeve, an insert, a stiffening element, a brake mount, a brake caliper mount and/or the like.
  • the fork has at least two interfaces, each of which is provided for fixing corresponding wheel mounts, the wheel mounts preferably being inserted.
  • the wheel mounts can be replaced quickly and easily, since no screws, bolts or other comparable connecting elements, which would also require a suitable tool, have to be fastened or loosened.
  • the claimed interfaces enable the connection of a corresponding wheel, so that the fork is suitable for a variety of different wheels.
  • the fork has at least one recess, a pocket, a groove and/or other elements for lighting and/or signaling means to be integrated, such as indicators and/or disc brake mounts and/or for forming a Cable duct is also injected.
  • the means to be integrated can, for example, be installed in the recess provided during the final assembly of the bicycle.
  • the fork has at least one defined interface for the positive attachment of a handlebar stem, the interface being suitable for receiving various handlebar stems.
  • the invention relates to a fork made of thermoplastic for a two-wheeler, which is produced according to one of the aforementioned embodiments of the method according to the invention.
  • at least one with a bicycle frame is on the fork.
  • men corresponding interface for electronic signal transmission is provided.
  • the fork made of a thermoplastic which is electrically non-conductive if no carbon fiber reinforcement is used, enables interference-free signal, data and/or energy transmission. Additional cabling in order to conduct the energy produced from an energy-generating unit such as a dynamo to the consumer, for example a bicycle light, could also be implemented using an appropriately functionalized film in the cavity of the fork.
  • Fig. 1 shows a section through a fork produced using the method according to the invention
  • Fig. 2 shows the fork with overflow cavity and injection points
  • Fig. 3 shows the fork with additional unidirectional tapes or organosheets
  • Fig. 4 shows the insert
  • FIG. 5 shows an exploded view of a fork produced using the method according to the invention
  • Fig. 6 shows an alternative embodiment of the fork with an overflow cavity produced using the method according to the invention.
  • the plastic core can be displaced from the component in different ways.
  • One form of procedure would be, for example, pressing the mass back.
  • Another form would be to blow out the plastic core material into an overflow cavity.
  • an inflation process can also be provided in which a smaller amount of thermoplastic is injected into the injection molding tool, which is then inflated.
  • the amount of injected plastic is selected so that almost no material is displaced from the injection molding tool during inflation.
  • Fig. 1 shows a schematic sectional view of the fork 100, which was manufactured according to the method according to the invention. Furthermore, the sectional position in Fig. 1 shows the cavity 102 formed inside the fork and the insert part 120 reinforcing the fork shaft 106. The insert part is usually inserted and positioned in the tool when configuring the injection molding tool. As further shown, the inner wall of the cavity 106 formed in the fork 100 does not have a smooth surface, but rather a large number of elevations and depressions. The closed tool in which the fork 100 shown is produced is not shown in more detail.
  • Fig. 2 the fork 100 from Fig. 1 is shown completely. Additionally visible are the overflow cavities 150, which are each arranged in the area of the wheel holders when configuring the tool, as well as the injection element 152, which is also inserted into the injection molding tool and includes the injection points AF and AS.
  • a plasticized plastic melt is injected in the direction of the arrow shown, while at the injection point AF after the plastic melt has been injected, the fluid flows through in the direction of the corresponding arrow a Injector not shown here is pressed in, so that the so-called plastic core is displaced from the interior of the fork 100 into the overflow cavities 150.
  • the overflow cavities 150 can preferably be closed hydraulically, pneumatically and / or electrically via a slide, not shown in detail.
  • the tools inserted into the injection molding tool and not shown in detail represent shaping cavities.
  • these shaping cavities not shown, it is possible to produce hollow-walled forks in large numbers with a specific shape inside the fork.
  • the at least one shaping cavity can be exchangeable in order to produce any desired component geometry using additional shaping cavities.
  • unidirectional tapes and/or organosheets 104 can be inserted into certain areas of the injection molding tool to reinforce the fork 100 to be manufactured.
  • the stiffness can also be adjusted, particularly in critical areas of the fork.
  • the illustration according to FIG. 3 also shows the tubular insert part 120 which is overmolded in the area of the fork shaft 106.
  • the insert part 120 can also be made of thermoplastic. According to an alternative embodiment of the method according to the invention, the insert part 120 is even made from the same thermoplastic material as the rest of the fork 100. Inserts made of aluminum and/or steel would also be conceivable.
  • Fig. 4 shows a detailed view of the insert part 120.
  • the trapezoidal contours 122A formed on the inner wall can be seen, which are also the contours 122A around grooves, depressions, elevations and/or can act in any other pattern.
  • the plastic melt is injected, a cohesive connection with increased strength is created between the insert part 120 and the overmolded plastic, thereby producing a high-strength fork shaft 106 overall.
  • the insert part 120 can have at least one flow channel 126 in addition to the inlet 128 on the underside, through which the injected plastic melt flows into the interior of the insert part 120, with the at least one flow channel 126 being formed on the longitudinal side of the insert part 120.
  • the arrow shown in FIG. 4 points in the flow direction of the plastic melt flowing into the insert 120.
  • positioning aid 124 which is intended to improve the handling of the insert 120 and its positioning in the injection molding tool.
  • a positioning aid tailored to a gripper is particularly advantageous, with such a corresponding gripper being controlled by a robot. In this way, the speed of the robot used for parts handling can be increased, so that the cycle time for producing the fork 100 can be reduced. At the same time, the failure rate when handling the parts decreases.
  • positioning aids 124 on the insert 120 positioning aids can also be provided in the injection molding tool.
  • FIG. 5 shows an exploded view of a fork 100 produced using the method according to the invention.
  • the contour 122B corresponding to the contour 122A, which is formed along the fork shaft 106 and represents a material connection with the insert part 120, can be seen particularly well.
  • At least one raised pocket 116 and/or recessed pocket for holding elements such as light guides, headlights, indicators and/or similar elements can be integrated into the fork 100.
  • at least one recess, a groove can also be provided on the fork 100 and/or other elements for lighting devices to be integrated and/or to accommodate the disc brakes and/or to form a cable duct.
  • the cavity 102 in the fork 100 can also be provided as a cable guide in order to establish a connection between the handlebars, the frame and/or electronic devices integrated in the fork with other electronic devices attached to the two-wheeler. It would also be particularly advantageous if the cables running in the cavity 102 of the fork 100 were guided directly into a hollow-walled handlebar stem and/or into the frame of the two-wheeler by means of a cable guide. Alternatively, the cavity 102 of the fork 100 can also be used as a guide for brake and/or shift cables. It would also be conceivable to route hydraulic brake lines or the like.
  • the components integrated into the fork 100 can also be threaded sleeves 118, screw-in sleeves, inserts, stiffening elements 110, brake receptacles, the brake caliper receptacles 114 shown in FIG. 6 and/or the like.
  • the threaded sleeves 118 are each integrated into the wheel holders 140.
  • unidirectional tapes and/or organosheets 104 can be inserted into the injection mold in areas of the insert part 120 before injecting the plastic melt according to an alternative variant of the method according to the invention and then back-injected.
  • the strength/stiffness of the insert or the fork shaft can be further increased.
  • Fig. 6 shows a fork 100 produced using the method according to the invention, which has two interfaces 112, each of which is provided for fixing corresponding wheel mounts 140.
  • the interfaces enable 112 a simple plug-in of the wheel holders 140. Because the wheel holders 140 are pluggable, their replacement can be carried out easily and flexibly. Consequently, this plug-in principle proves to be advantageous in the event of damage to a wheel mount 140. Also noticeable are the overflow cavities 150, whose shaping openings can be decisive with regard to the shape of the interfaces 112. Nevertheless, the plastic melt displaced from the fork 100 can flow into the overflow cavities 150.
  • thermoplastic components for two-wheelers All in all, the present invention represents an excellent solution with regard to the production of thermoplastic components for two-wheelers.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'une fourche qui comporte au moins une cavité à l'intérieur et qui est constituée d'un thermoplastique pour un véhicule à deux roues au moyen d'un processus de moulage par injection de plastique et d'un processus d'injection de fluide, comportant les étapes suivantes : fermeture d'un outil de moulage par injection configuré ; injection d'au moins un fluide dans l'outil de moulage par injection fermé afin de déplacer le noyau en plastique hors de l'intérieur de la fourche ou pour remplir au moins une cavité de moulage qui est introduite dans l'outil de moulage par injection ; refroidissement du composant moulé par injection ; et ouverture de l'outil de moulage par injection et retrait de la fourche.
EP23738672.7A 2022-07-26 2023-07-03 Procédé de fabrication d'une fourche pour un véhicule à deux roues Pending EP4363187A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022118736.5A DE102022118736A1 (de) 2022-07-26 2022-07-26 Verfahren zur Herstellung einer Gabel für ein Zweirad
PCT/EP2023/068244 WO2024022744A1 (fr) 2022-07-26 2023-07-03 Procédé de fabrication d'une fourche pour un véhicule à deux roues

Publications (1)

Publication Number Publication Date
EP4363187A1 true EP4363187A1 (fr) 2024-05-08

Family

ID=87158378

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23738672.7A Pending EP4363187A1 (fr) 2022-07-26 2023-07-03 Procédé de fabrication d'une fourche pour un véhicule à deux roues

Country Status (4)

Country Link
EP (1) EP4363187A1 (fr)
CN (1) CN118317859A (fr)
DE (1) DE102022118736A1 (fr)
WO (1) WO2024022744A1 (fr)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11114997A (ja) 1997-10-21 1999-04-27 Nippon Plast Co Ltd 分岐中空体の製造方法
TW548173B (en) 2001-07-10 2003-08-21 Cinpres Gas Injection Ltd Process and apparatus for injection moulding a hollow plastics article
CN203581271U (zh) * 2013-10-17 2014-05-07 硕懋工业股份有限公司 滑步车结构
CN103552220A (zh) 2013-11-07 2014-02-05 天津国丰模具有限公司 自行车主体构件加工机构及加工方法
DE102016015538B4 (de) 2016-12-22 2024-02-22 Plastic Innovation Gmbh Verfahren zur Herstellung eines Fahrradrahmens
DE102020133019A1 (de) * 2020-12-10 2022-06-15 Plastic Innovation Gmbh Verfahren zur Herstellung eines Zweiradrahmens

Also Published As

Publication number Publication date
WO2024022744A1 (fr) 2024-02-01
CN118317859A (zh) 2024-07-09
DE102022118736A1 (de) 2024-02-01

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