Abstract: The present invention relates to an oven for heating an essentially liquid medium, especially a reactive casting material, flowing through the oven. The oven has an inlet into a channel for the medium to be heated, in which channel there is arranged a separate pipe through which the medium to be heated flows and in which it is heated by electromagnetic radiation. Several heating units are arranged along the channel, each of which comprises an electromagnetic radiator containing a waveguide. The waveguides guide the radiation to the channel through which the medium flows and which couples the radiation into that channel. The heating units are substantially decoupled from one another by means of a decoupling diaphragm that is provided in the channel and is arranged between two adjacent heating units or radiators essentially at right angles to the direction of flow. The pipe through which the medium flows passes through a passage in the decoupling diaphragm, thus also constituting a support for the pipe.

Abstract: The present invention relates to a process for the manufacture of castings from an essentially liquid reactive medium as casting material which, above its gelation temperature, reacts to form a solid material. The liquid reactive medium is fed from a supply tank, in which the temperature of the casting material lies substantially below its gelation temperature. The liquid reactive medium is fed into a casting mould which has been heated to a temperature that lies above the gelation temperature of the casting material. The casting material is substantially preheated directly before it enters the casting mold to a temperature close to but below the gelation temperature of the casting material.

Abstract: A container of hardened, fiber-reinforced synthetic resin and high stability is manufactured by forming a wound-up structure on a shaping core born on the shaft of a winding machine together with fittings for the two open container ends, of different size, and being clamped against the two core ends by means of fixing members held in position on the winding shaft during winding. One of the fittings is provided with an annular groove for anchoring the wound-up structure therein. The fixing members and fittings are of such shape that the winding affords a wound-up structure having end openings of equal size so that a geodetic depositing of the wrapped layers is possible. After the structure is hardened, the portion thereof extending beyond the fitting having an opening of larger diameter than that closed by the other fitting is cut off, so that a container closed by the first fitting and open through the second fitting is obtained.

Abstract: The end region of the fibre reinforced plastics hollow shaft (1) is clamped between an outer ring (3) and an inner ring (21) provided on the metal part (2) which is to be connected to the shaft. The two rings are clamped to the shaft wall and to one another so that there is a frictional connection between the shaft (1) and the metal part (2). The rings are clamped thermally by shrinking the rings on and into the shaft. This type of connection between a plastics shaft and a metal part is very simple and effective. (FIG. 1).

Abstract: A process for producing reinforced plastics tube for use, inter alia, as a transmission shaft wherein the tube is produced by winding on to a core reinforcing fibres preferably of carbon impregnated with a curable plastics at predetermined winding angles <35.degree. and then winding on to the reinforcing fibres at angles between .+-.80.degree. and .+-.90.degree. a peripheral winding of a material which is relatively resilient with respect to the reinforcing fibres and which has a high coefficient of thermal expansion. The tube so formed is then heat cured. Fittings are secured to the ends of the tube and the ends may be reinforced with a carbon fibre structure.

Abstract: In order to provide a pin for connecting machine parts with one another, which is of optimally light weight, the pin is of a compound structure comprising a core of filler-reinforced synthetic plastics resin and a metallic envelope. As filler there are used quartz sand or carbon fibers. The envelope is preferably seated on the core under circumferential tensile bias. The manufacture of the pin takes place, for instance, by pressing the filler and a matrix resin system directly into a suitably prepared envelope.

Abstract: In order to provide a pin for connecting machine parts with one another, which is of optimally light weight, the pin is of a compound structure comprising a core of filler-reinforced synthetic plastics resin and a metallic envelope. As filler there are used quartz sand or carbon fibers. The envelope is preferably seated on the core under circumferential tensile bias. The manufacture of the pin takes place, for instance, by pressing the filler and a matrix resin system directly into a suitably prepared envelope.

Abstract: The carbon fibre reinforced plastics tube (1) is provided at each end with a cemented-in sleeve (2) and a cemented-on sleeve (3) made of the same material and having the same anisotropy behaviour. A fitting (4) is inserted into each end of the tube to introduce a torque and is secured by bolts (5). The bolts are secured by a sleeve (6). The securing of the fittings by bolts and the adapted structure of the wall reinforcements ensure a safe introduction of torque, even into extremely anisotropic tubes.