Abstract: A structure and method for producing golf club heads from fiber reinforced plastic is described. A long fiber reinforced thermoplastic material is used to injection mold the golf club head. The long fiber reinforced thermoplastic material provides three-dimensional strength and stiffness. The long fiber reinforced thermoplastic material is injected into a mold so that the fibers become entangled with each other. Entangled fibers provide increased strength and stiffness in more than a single direction. A sole plate and face plate are also provided. Because of the strength and rigidity of the material used to fabricate the golf club head, the face plate may be fabricated from materials not otherwise useable. A flexible thermoplastic foam block is positioned in the interior of the golf club head to prevent rattle and to provide a realistic wood sound when hitting a golf ball.

Abstract: A spoke for wheels of bicycles, wheelchairs, and the like includes an injection molded discontinuous fiber reinforced plastic shaft formed to have an airfoil shape cross-section, to be oriented in the wheel so as to provide the least wind drag. The shaft is formed with an axially extending threaded first hollow at a first end and an axially extending second hollow at a second end. The spoke further includes an elongate hub element formed with a bend at one end and threads at the other end for screwing into the first hollow of the shaft, and an elongate bar for insertion and securing at one end into the second hollow of the shaft. Threads are formed at the other end of the bar for connecting to the rim of the wheel.

Abstract: A method of manufacturing filament-wound tubes or shafts includes drywinding a plurality of elongate mandrels with the filament, inserting the filament wound mandrels into respective elongate hollow molds of a mold complex, and injecting resin such as epoxy resin under pressure into the hollow molds into intimate contact with the filament. Heat is then supplied to the mold complex to heat the resin to a predetermined temperature and for a predetermined period of time to cure the resin and thereby form the tubes or shafts. The mandrels and tubes or shafts are removed from the hollow molds and then the mandrels are removed from the tubes or shafts. Many of these activities are carried out in parallel to increase the manufacturing throughput of the tubes or shafts.

Abstract: A method of manufacturing filament-wound tubes or shafts includes drywinding a plurality of elongate mandrels with the filament, inserting the filament wound mandrels into respective elongate hollow molds of a mold complex, and injecting resin such as epoxy resin under pressure into the hollow molds into intimate contact with the filament. Heat is then supplied to the mold complex to heat the resin to a predetermined temperature and for a predetermined period of time to cure the resin and thereby form the tubes or shafts. The mandrels and tube or shafts are removed from the hollow molds and then the mandrels are removed from the tubes or shafts. Many of these activities are carried out in parallel to increase the manufacturing throughput of the tubes or shafts.