摘要:
Coupling piece (1) for an outer end of a multilayered conduit (26), comprising a coupling pipe (2) which is provided on the outer side with a radially upright wall (4), wherein the wall is widened in axial direction at a radial distance from the outer side of the body, wherein the outer side of the coupling pipe (2), the upright wall (4) and the widened portion enclose an annular insertion space into which the outer end of the conduit can be directly inserted, and wherein the radial distance between the widened portion of the wall and the outer side of the coupling pipe at the position of the entry to the insertion space is such that it is equal to or greater than the wall thickness of the conduit (26), wherein the inner wall of the coupling pipe is reinforced with an adjacent reinforcing layer of reinforced plastic or of metal which has a greater strength than the material of the coupling pipe (2), wherein the outer layer of the reinforcing layer which is adjacent to the inner wall, is provided with a relief structure which comprises preferably axial engaging elements.
摘要:
A method of manufacturing a lightweight vehicle frame, and the end product fame, are disclosed. A first tube, which can be a cured hollow reinforced resin composite tube, is connected to a second part by a tab. The tab is tapered and is affixed to the first tube. The tab is bonded to the second part by an epoxy. The taper of the tab allows the angle at which the parts are connected to be controlled through a wide range.
摘要:
A rigid thermoplastic manifold for the distribution of pressurized carbonated water has an elongate tubular thermoplastic body with a plurality of apertures spaced along its length, a plurality of identical thermoplastic outlet fittings which each have at inlet spud with a sonic energy director and a pair of arcuate sonic energy directors spaced one on each side from the spud, each outlet fitting being fastened and sealed to the tube with three discrete sonic welds. A method of making the manifold is also provided.
摘要:
A joint between two hollow pipes is formed by inserting the pipes into a sleeve. The sleeve is made of a similar or compatible material to that of the pipes which are to be joined. The inner diameter of the sleeve increases from a middle portion outwardly to two end portions. The sleeve includes a pair of tapered collars which engage each end portion and abut the middle portion. Relative rotation of the pipes and sleeve causes melting and mixing of the pipe and sleeve surfaces. This mixing action eliminates the weld line present in known systems.
摘要:
Several cylindrical studs radiate from a spherical central hub to form a connector for joining adjacent ends of tubular structural members. The connector has six orthogonally arranged studs each sized to be fitted in an end portion of a structural member. The connector is formed in two identical halves secured together along a central plane bisecting four of the studs. The hub of the connector has a continuous peripheral wall, and the studs have tapered walls decreasing in thickness from such continuous peripheral wall outward toward the free ends of the studs. In a desired framework construction, one or more of the studs can be cut off without exposing the interior of the hub or jeopardizing the strength of the connector.
摘要:
An electric heating element for sterilely cutting and welding together a pair of thermoplastic tubes transversely of the axis of each tube includes as an outer layer a folded sheet of a metal, such as copper, aluminum, silver or gold, having a thermal conductivity of at least about 173 watts/m.degree.K at a thickness of 0.10 mm and a tensile yield strength of at least 34.times.104 kPa at a 0.10 mm thickness. A resistance heating element, preferably having a positive thermal coefficient of resistance (PTC), in the form of a resistor of stainless steel or the like is disposed inside the fold of the metal sheet and a layer of dielectric adhesive, such as an epoxy or acrylic adhesive, stable to about 260.degree. C., is disposed between the inner surfaces of the metal sheet and the resistor to insulate the resistor from the folded sheet and bond the resulting structure together. The folded edge of the metal sheet forms the melting edge of the heating element. The heating element has a thickness of from about 0.13 mm. to about 0.76 mm.
摘要:
A method of manufacturing a lightweight vehicle frame, and the end product frame, are disclosed. A first tube, which can be a cured hollow reinforced resin composite tube, is connected to a second part by a tab. The tab is tapered and is affixed to the first tube. The tab is bonded to the second part by an epoxy. The taper of the tab allows the angle at which the parts are connected to be controlled through a wide range.
摘要:
The plastic moulding and design structure has a load-bearing structure (3), which is wholly or partly surrounded by a polymer material (8) forming the moulding. The load-bearing structure (3) is formed from several interconnected, high strength, continuous fibre-reinforced structural elements (5). Thus, in a simple and inexpensive manner it is possible to produce structures with the most varied shapes such as containers, tanks, vehicle frames, etc.
摘要:
In a connection between round composite fiber rods or pipes positioned at an angle to one another there are provided angular connecting elements of which the angle corresponds to the angle between the rods to be connected, fiber helical windings in the region of the vertices of the angular connecting elements, respective arms of the connecting elements being arranged to be inserted in the rod or pipe ends. The angular connecting elements are fastened positively on a rod and/or rest frictionally in the rod ends. The fiber helical windings wrap around the angular connecting elements in their angled portions and connect them to one another. Fillers and/or adhesives fill the cavities which are formed at the rod or pipe ends.