Abstract:
Disclosed is a method for manufacturing a resin pipe, including: heating a sheet member after winding the sheet member around a bar desired multiple times and holding the sheet member, wherein the sheet member is melted and molded into a resin pipe by the heating, and the bar is removed from the resin pipe after the heating.
Abstract:
Provided is a toroidal pressure vessel having extremely high pressure resistance. Laminating latitudinal reinforcing fiber layers (32) enables to improve a strength in a latitudinal direction of a pressure vessel (1). Moreover, putting reinforcing fibers (32a) constituting those laminated latitudinal reinforcing fiber layers (32) in continuity enables to further improve the strength in the latitudinal direction of the pressure vessel (1), for example compared with a case where the reinforcing fibers are divided for each layer.
Abstract:
An apparatus, and method for laying up structural filaments. The apparatus includes an openable race providing a circular path for a carrier bearing a filament source. The carrier moves circumferentially within the race and may be formed as a centerless wheel. The carrier may be formed in sections to facilitate opening of the race to insert a workpiece.
Abstract:
A thread, intended to form a carcass reinforcement, is wound in contiguous hoops on a rigid core through an eyelet fastened on a chain mounted on pulleys arranged around the core. The eyelet carries out a reciprocating movement around the core so as to progressively and contiguously lay a hoop upon each forward movement and a hoop upon each return movement.
Abstract:
A beam adapted for implantation within a bone is able to support bending and torsional loading forces applied thereto. The beam has a stiffness defined by a modulus elasticity, which stiffness varies along the length of the beam to match the corresponding stiffness of the cortical bone adjacent the beam after implantation within the bone. The beam is made from an elongated core formed of chopped carbon fibers embedded in a thermoplastic polymer matrix. Encasing the core is a sheath formed of carbon reinforced filament fibers embedded in the thermoplastic polymer which is wound in spiral formation around the core and molded thereto. The winding angle and the sheath thickness along the beam may be varied to vary the modulus of elasticity to match that of the cortical bone adjacent thereto.
Abstract:
Two robot arms (16, 17) controlled by a preprogrammed system support each in turn a thread dispensing cassette (18), one of the arms 16 equipped with the cassette travelling over one part of a winding path 19 around a mandrel 2, at the end of which the cassettee is transferred to the other arm 17, which travels over the other part of the said path up to the point of departure of the first arm, in such a way that the thread is wound around the entire periphery of the mandrel in a movement that is analogous to the placing of a bandage around a limb when the rolled up bandage is passed from one hand to the other while unrolling the said bandage. Application to filament winding of complex shapes, particularly of toroidal articles, is disclosed.
Abstract:
A rigid, molded fiberglass duct having an integral bendable elbow comprised of two sections of cured fiberglass securely bonded to a corrugated metal-foil sleeve. The method of manufacturing the rigid bendable duct is by sliding a corrugated metal-foil sleeve on to a mandrel and then wrapping the ends of the sleeve with uncured fiberglass. The area of the uncured fiberglass overlapping the corrugated, bendable sleeve is compacted by means of a collar which fits around the sleeve and the fiberglass and compresses the fiberglass into the corrugations of the sleeve. In order to enhance the bond, protusions may be provided in the overlapping area of the sleeve, such as by cutting the corrugated sleeve and bending it up to form tabs.
Abstract:
An apparatus and method are provided for winding hoop windings onto a cylindrical member which may be a fiberglass tube or a mandrel. Two sequential stations are provided, each of which includes a rotatable drum and a rotatable winding member. Each of these is separately drivable by respective pulleys. The separately driven drum can be wound with filament or filament may be stripped therefrom according to requirement. The associated winding member consists of two funnels between which are positioned a plurality of pulleys, such that the filament can be unwound from the associated drum and applied to the mandrel or tube.
Abstract:
A rigid, molded fiberglass duct having an integral bendable elbow comprised of two sections of cured fiberglass securely bonded to a corrugated metal-foil sleeve. The method of manufacturing the rigid bendable duct is by sliding a corrugated metal-foil sleeve on to a mandrel and then wrapping the ends of the sleeve with uncured fiberglass. The area of the uncured fiberglass overlapping the corrugated, bendable sleeve is compacted by means of a collar which fits around the sleeve and the fiberglass and compresses the fiberglass into the corrugations of the sleeve. In order to enhance the bond, protusions may be provided in the overlapping area of the sleeve, such as by cutting the corrugated sleeve and bending it up to form tabs.