摘要:
A hockey stick shaft having a cross-sectional configuration with a pair of flat sides and substantially circular top and bottom edges, a hockey stick shaft adapted for receiving a replacement blade and have a plurality of layers of unidirectional fibers.
摘要:
A method of making a product including continuously feeding an elongated flexible tubular bladder, and braiding a first ply of a tubular braid of first yarns including reinforcing fibers and moldable material on the bladder, the tubular bladder having sufficiently high temperature degradation characteristics with respect to a molding processing temperature of the material such that the bladder maintains its structural integrity when the material is molded thereon.
摘要:
A sports racket frame with improved string holes includes a predetermined number of insertion pins pre-arranged in the molding cavity. The inner wall surface of the molding cavity adjacent to each insertion pin is filled with the fiber cement made of materials identical in quality with those making up the tubular strip used to form the racket frame. The sports racket frame so attained is composed of string holes which are integrally and simultaneously made with the racket frame as a unitary body and are provided with tubular support wall extending along the circumference thereof to reinforce the structural strength of the racket frame.
摘要:
A fork assembly including a stiff steerer tube assembly of metal or the like connected to a generally hollow unitary crown and blade component made of molded resin impregnated fibrous material. The unitary component has at least two adjacent wall sections united by an integrally uniting junction formed by overlapped parts of the sections having sufficiently intimate contact therebetween for stress loadings to be transferred from fiber to fiber across the juncture. The steerer assembly may include a laterally extending and downwardly projecting anchor member which is adhered to an inside surface of the unitary component and may be laminated between overlapping wall sections.
摘要:
A method of molding generally hollow components and assemblies for a bicycle frame including molded composite materials, such as unidirectional structural fibers impregnated with a heat curable synthetic resin. Opposing parts of at least two adjacent wall sections are overlapped to form a shell and the overlapped parts are compressed together between an external mold and an internal pressing member, such as an inflatable bladder. The shell is then cured while under compression to provide a pressure molded juncture integrally uniting the wall sections and forming a generally hollow bicycle frame component.
摘要:
In a frame (1') for ball game racquets made of plastic the abrasion and cutting of the guts against the edges of passages in the frame is avoided. For that purpose the frame (1') comprises a center strip (3) of thermoplastic resin, the hardness of which is less than or equal to the hardness of the guts. Hollow profiles (4, 5) of duroplastic, fibre-reinforced synthetic resin are moulded onto both sides of the center strip. The passages are drilled into the center strip (3) after the frame has been produced and then the frame is strung.
摘要:
Disclosed is an improved bicycle frame of composite materials and a method of molding generally hollow components and assemblies for such a bicycle frame. The entire bicycle frame may be one integrally united piece of molded composite materials, such as unidirectional structural fibers impregnated with a heat curable synthetic resin. Layers of the composite material may be shaped to form an uncured frame shell. This shell is compressed against the surfaces of a mold by an internal pressing member, such as an inflatable bladder routed to the outside through a passageway passing through a modified bottom bracket sleeve or a modified head tube sleeve. The shell is then cured while under compression in the mold.
摘要:
A composite sports racket frame having a head portion subject to loading is provided with an integral arrangement of resin impregnated braided tow tubes and a layer of tow disposed in wound fashion between part of the braided tows. A method of making a sports racket frame by winding a resin impregnated tow about part of a braided tow tube and placing a second braided tow tube to form an assembly that is internally pressurized and heat cured is disclosed.
摘要:
A tennis racket frame is constructed primarily of an elongated hollow tube member having a wall thereof consisting essentially of a plurality of concentric layers of high tensile strength fibers impregnated and bonded together by binder resin, at least two of the layers being helical windings of opposite unidirectional hands, and the head portion of a racket frame having a groove molded therein to receive the loop portions of the strings in recessed relation to the surrounding surface areas of the frame. The frames are made by a method including the use of a special mandrel on which the layers of fiber are wound under controlled conditions providing extra material in the head portion which is formed into the wall of the grooved portion of the head without affecting the overall sectional dimensions of the frame.
摘要:
A tennis racket frame is constructed primarily of an elongated hollow tube member having a wall thereof consisting essentially of a plurality of concentric layers of high tensile strength fibers impregnated and bonded together by binder resin, at least two of the layers being helical windings of opposite unidirectional hands, and the head portion of a racket frame having a groove molded therein to receive the loop portions of the strings in recessed relation to the surrounding surface areas of the frame. The frames are made by a method including the use of a special mandrel on which the layers of fiber are wound under controlled conditions providing extra material in the head portion which is formed into the wall of the grooved portion of the head without affecting the overall sectional dimensions of the frame.