Abstract: This mechanism offers a simple solution wherein an axial movement of a grooved piece (6) brings about a radial movement of rigid balls (5) that grip and deform a pipe (1) that is initially in a plastic state. Depending on the geometry of the channels (7) of the grooved piece (6), a variable grip is achieved. This gripping operation is simply released as the grooved piece (6) returns to its initial position, the pipe (1) itself now being in a solid state, so that the balls (5) are returned to their initial position. The correct position for gripping the plastic pipe can be detected by a detector (11). The pressurization of the plastic pipe can be achieved thanks to an elastic joint (10) on the piece that surrounds the pipe (1).

Abstract: The equipment consists of a mould (1) with external heating elements (3) and with asymmetric heads (4) at the ends thereof, allowing insertion of the corresponding tubular profile or plastic tube (6) inside the already hot mould (1) at the same temperature as the actual mould (1) in order to prevent any heat exchange. The mould (1) is mounted on a support (2) that can tilt and rotate, while the heads (4) include a vacuum take-off orifice (5), fastening means (7) for the plastic tube (6), which, once inserted into the mould (1) rests on the lower generatrix of the latter, and inlet (8) and outlet (9) means for fluids for expanding the plastic tube (6) and for cooling same, the mould (1) incorporating, on the side, an inlet orifice for a lubricating fluid that facilitates removal of the plastic tube (1) once the latter has been shaped. The tube (6) expands owing to the introduction of the expander fluid through the inlet (8).

Abstract: The apparatus comprises a first sector wherethrough is introduced the biaxially oriented pipe and the gasket, a second sector, with diameter greater than that of the first sector, and a third sector, concentric to the second sector. The first sector is formed by at least three segments separated by isolating washers, so that at least two of said segments of the first sector, the second sector and the third sector are connected to means of heating and/or means of cooling regulated by a control unit which allows the selective and independent variation of the temperature of said segments and sectors and therefore of the pipe to favour the modelling of the socket with the integral gasket avoiding the disorientation of the pipe.

Abstract: The apparatus is constituted from a mold (1, 17, 14) formed by a central body (14) and a first head (1) and a second head (17) connected on opposite sides of the central body (14), as well as it having a rigid and perforated guide (5), which is axially centered inside the mold (1, 17, 14) whereon the blank pipe (10) is coupled longitudinally. This guide is provided with orifices (9) for the passage therethrough of an expansion fluid (18) which causes the expansion of the blank pipe (10) against the inner walls of the mold (1, 17, 14) without any heat exchange between the blank pipe (10) and the mold (1, 17, 14).

Abstract: This mechanism offers a simple solution wherein an axial movement of a grooved piece (6) brings about a radial movement of rigid balls (5) that grip and deform a pipe (1) that is initially in a plastic state. Depending on the geometry of the channels (7) of the grooved piece (6), a variable grip is achieved. This gripping operation is simply released as the grooved piece (6) returns to its initial position, the pipe (1) itself now being in a solid state, so that the balls (5) are returned to their initial position. The correct position for gripping the plastic pipe can be detected by a detector (11). The pressurisation of the plastic pipe can be achieved thanks to an elastic joint (10) on the piece that surrounds the pipe (1).

Abstract: An example system is described for the integrated manufacturing of sockets in oriented pipes, with the possibility of regulating and distributing at will the thicknesses of the socket and making it possible to reinforce the traditionally weaker zones, without increasing the manufacturing process time. The system includes a support body, a slide block sliding axially on the inside of the body with a conical inner end, a heater, and a slide rod for pushing the corresponding blank. The slide rod has an axial and central orifice for the introduction of expansion and cooling fluid, whilst the slide block has orifices for the intake of a lubricating fluid.

Abstract: The apparatus is constituted from a mould (1, 17, 14) formed by a central body (14) and a first head (1) and a second head (17) connected on opposite sides of the central body (14), as well as it having a rigid and perforated guide (5), which is axially centred inside the mould (1, 17, 14) whereon the blank pipe (10) is coupled longitudinally. This guide is provided with orifices (9) for the passage therethrough of an expansion fluid (18) which causes the expansion of the blank pipe (10) against the inner walls of the mould (1, 17, 14) without any heat exchange between the blank pipe (10) and the mould (1, 17, 14).

Abstract: The equipment consists of a mould (1) with external heating elements (3) and with asymmetric heads (4) at the ends thereof, allowing insertion of the corresponding tubular profile or plastic tube (6) inside the already hot mould (1) at the same temperature as the actual mould (1) in order to prevent any heat exchange. The mould (1) is mounted on a support (2) that can tilt and rotate, whilst the heads (4) include a vacuum take-off orifice (5), fastening means (7) for the plastic tube (6), which, once inserted into the mould (1) rests on the lower generatrix of the latter, and inlet (8) and outlet (9) means for fluids for expanding the plastic tube (6) and for cooling same, the mould (1) incorporating, on the side, an inlet orifice for a lubricating fluid that facilitates removal of the plastic tube (1) once the latter has been shaped. The tube (6) expands owing to the introduction of the expander fluid through the inlet (8).

Abstract: An example system is described for the integrated manufacturing of sockets in oriented pipes, with the possibility of regulating and distributing at will the thicknesses of the socket and making it possible to reinforce the traditionally weaker zones, without increasing the manufacturing process time. The system includes a support body, a slide block sliding axially on the inside of the body with a conical inner end, a heater, and a slide rod for pushing the corresponding blank. The slide rod has an axial and central orifice for the introduction of expansion and cooling fluid, whilst the slide block has orifices for the intake of a lubricating fluid.