Welcome to QBike!
Find the lowest prices on bike gear - check out our Super Savings page for lots of great deals.
The manufacturing process of bicycle frame and their components from filament wound components which have been cut from a section of filament wound stock is explained. A frame for a two-wheeled vehicle comprising: a three-sided, continuous front structural element with a left side and a right side, the front structural element comprising: a top beam having a first end and a second end, a seat beam having a first end and a second end, and a down beam having a first end and a second end, said top beam first end connected to said seat beam first end, front structural element constructed fromcomposite material; a rear structural element with a right side and a left side said rear structural element comprising: a bottom bracket tube in the vicinity of the juncture of said chain stay and said seat beam. Bike filament construction is key. The use of quality structural foam facilitates building components with the desired wall thickness without resulting in an expensive part to manufacture or an unduly heavy part. Fiberglass Laminating Filament Winding can also be described as the manufacture of parts with high fiber volume fractions and thus controlled fiber orientation. Fiber tows are immersed in a resin bath where they are coated with low or medium molecular weight reactants. The impregnated tows are then literally wound around a mandrel (mold core) in a controlled pattern to form the shape of the part. The mold core may be removed or may be left as an integral component of the part. Pressure vessels, pipes and drive shafts have all been manufactured using filament winding. It has been combined with other fiber application methods such as hand layup, pultrusion , and braiding. Compaction is through fiber tension and resin content is primarily metered. The fibers may be impregnated with resin before winding (wet winding), pre-impregnated (dry winding) or post-impregnated. Wet winding has the advantages of using the lowest cost materials with long storage life and low viscosity. The pre-impregnated systems produce parts with more consistent resin content and can often be wound faster. Materials Glass fibre is the fibre most frequently used for filament winding, carbon and aramid fibres are also used. Most high strength critical aerospace structures are produced with epoxy resins, with either epoxy or cheaper polyester resins being specified for most other applications. The ability to use continuous reinforcement without any breaks or joins is a definite advantage, as is the high fibre volume fraction that is obtainable, about 60% to 80%. Only the inner surface of a filament wound structure will be smooth unless a secondary operation is performed on the outer surface. The component is regularly cured at high temperature before removing the mandrel. Finishing operations such as machining, grinding, or grinding for filament products are not normally necessary.