Abstract: A process for manufacturing a plastic hollow body including extruding a molten plastic parison through a die. At least one longitudinal cut is made in the parison. The parison is introduced into a mold comprising two cavities. The hollow body is molded by conforming the parison to the mold cavities. The die includes a passage for the molten plastic which gradually modifies the shape of the parison so that it is substantially flattened on exiting.

Abstract: A process for manufacturing a plastic hollow body by molding two sheets of molten plastic in a mold including two cavities, the process including: a) two molten plastic sheets are manufactured by extrusion of at least one stream of molten plastic and transverse cutting thereof; b) these sheets are introduced between the mold cavities; c) the mold is closed and the hollow body is manufactured by conforming the two sheets to the mold cavities; d) the hollow body thus obtained is removed from the mold; e) all of operations a) to d) are repeated to manufacture another hollow body from two new sheets; and before, during, or after the transverse cutting operation, the lower portion of the two new sheets is cooled using a specific device that makes possible a local cooling of the sheets in the lower portion.

Abstract: A method for manufacturing a flexible heater that has a resistive track enclosed in two sheets of electrically insulating plastic material is provided. The resistive track of the flexible heater has electrical connections to which electrical wires are connected.

Abstract: Process for fastening an accessory to a hollow body obtained by molding a molten plastic parison, this fastening taking place by snap-riveting with the aid of a tool during the actual molding of the parison, according to which, before carrying out the snap-riveting, the parison is locally deformed so as to surround the snap-riveting zone with a dome, the snap-riveting zone being also in relief (hollow) compared to the rest of the accessory.

Abstract: Process for manufacturing a plastic fuel tank (FT) equipped with an internal accessory, by molding a parison using a mold comprising two cavities and a core, said process comprising the following steps: the parison is introduced into the mold cavities; the core is introduced inside the parison, the core having first been fitted with the accessory; the mold is closed so that the cavities come into leaktight contact with the core; the parison is pressed against the cavities by blowing through the core and/or applying a vacuum behind the cavities; the accessory is fastened to the parison by snap riveting using a device attached to the core; the mold is opened to withdraw the core; and the final molding of the parison is carried out by blow molding and/or thermoforming.

Abstract: Process for manufacturing a plastic fuel tank provided with at least one accessory (14) connected to the internal space of the tank via at least one orifice (12) in the wall (10) of the tank, the accessory including a projecting element (24) extending to the outside of the tank, the processing comprising the steps consisting in providing a film (22) that includes a peripheral region (28) and a border region (30) around an opening in the film, in placing the film on the wall of the tank and on the outer surface of the accessory in such a way that the projecting element passes through the film via the opening, in welding the film over its entire peripheral region to the wall of the tank, and in welding the film, over its entire border region, to the outer surface of the accessory.

Abstract: Method for manufacturing a flexible heater comprising a resistive track enclosed in two sheets of electrically insulating plastic material, said track comprising electrical connections to which electrical wires are connected, the method comprising the steps of: —enclosing the resistive track in the two sheets of electrically insulating plastic material—connecting the electrical wires to the electrical connections of the resistive track—putting an open mould around the connection area—injecting a liquid casting formulation into said mould—curing said composition—removing the mould.

Abstract: Process for fastening an accessory to a hollow body obtained by molding a molten plastic parison and using a plastic connector comprising coupling means for the accessory and a stop surface intended to limit the penetration of the connector into the molten plastic, according to which the stop surface is provided with a curved double lip (or one-piece part having two concentric curved edges, i.e., two protuberances located preferably at its periphery, which are concentric and are in relief relative to the remainder of the part) and the connector is welded to the inner wall of the parison using this double lip.

Abstract: Process for manufacturing a plastic hollow body, the process comprising the following steps: a) a tubular stream of molten plastic is extruded; b) this stream is taken up by means of a tensioning device; c) a transverse cut is made in this stream so as to create a parison having one free edge that is not taken up by the tensioning device; d) the parison is moved relative to the tensioning device so that the free edge of the parison is also taken up by the tensioning device; and e) at least one longitudinal cut is made in the parison over its entire length. Equipment suitable for implementing this process.

Abstract: Process for manufacturing a fuel tank provided with internal accessories, based on a plastic parison, which is split or in at least two parts, in which process, the accessories are positioned on the parison while it is being molded, using a core (1) forming part of a mold which also comprises dies (2a, 2b), and in which process, the core is able to move in a controlled manner at a variable speed and/or between optional stop positions of variable duration.

Abstract: A process for manufacturing a plastic hollow body by molding two sheets of molten plastic in a mold including two cavities, the process including: a) two molten plastic sheets are manufactured by extrusion of at least one stream of molten plastic and transverse cutting thereof; b) these sheets are introduced between the mold cavities; c) the mold is closed and the hollow body is manufactured by conforming the two sheets to the mold cavities; d) the hollow body thus obtained is removed from the mold; e) all of operations a) to d) are repeated to manufacture another hollow body from two new sheets; and before, during, or after the transverse cutting operation, the lower portion of the two new sheets is cooled using a specific device that makes possible a local cooling of the sheets in the lower portion.

Abstract: Process for manufacturing a plastic fuel tank equipped with an internal line by molding a parison using a mold comprising two cavities and a core, comprising the following steps: introducing the parison into the mold cavities; introducing the core inside the parison, said core having first been fitted with the line; closing the mold so that the cavities come into leaktight contact with the core; pressing the parison against the cavities by blowing through the core and/or applying a vacuum behind the cavities; fastening the line to the parison over at least two points using a device attached to the core; opening the mold to withdraw the core; and carrying out the final molding of the parison by blow molding and/or thermoforming, in which the line comprises, between its fastening points, a free length that is capable of coming into contact with the parison and/or with an accessory found thereon when the mold is closed, and wherein during the fastening step, at least one intermediate fastening point is created u

Abstract: A process for manufacturing a plastic hollow body including extruding a molten plastic parison through a die. At least one longitudinal cut is made in the parison. The parison is introduced into a mold comprising two cavities. The hollow body is molded by conforming the parison to the mold cavities. The die includes a passage for the molten plastic which gradually modifies the shape of the parison so that it is substantially flattened on exiting.

Abstract: Process for manufacturing a plastic hollow body, said process comprising the following steps: a) a molten plastic parison is extruded, in an extruder, through a die; b) at least one longitudinal cut is made in the parison; c) the parison is introduced into a mold comprising two cavities; and d) the hollow body is molded by conforming the parison to the mold cavities, said die being equipped with a passage for the molten plastic which gradually modifies the shape of the parison so that it is substantially flattened on exiting. Die suitable for implementing this process.

Abstract: A process for manufacturing a plastic hollow body by molding a molten plastic parison, which is extruded vertically through a die, in a mold comprising two complementary cavities, characterized in that the die is adjusted so that the shape of the parison matches that of the mold cavities. A die suitable for such a process.

Abstract: Process for manufacturing a plastic hollow body, the process comprising the following steps: a) a tubular stream of molten plastic is extruded; b) this stream is taken up by means of a tensioning device; c) a transverse cut is made in this stream so as to create a parison having one free edge that is not taken up by the tensioning device; d) the parison is moved relative to the tensioning device so that the free edge of the parison is also taken up by the tensioning device; and e) at least one longitudinal cut is made in the parison over its entire length. Equipment suitable for implementing this process.

Abstract: Process for manufacturing a plastic hollow body, the process comprising the following steps: a) a tubular stream of molten plastic is extruded; b) this stream is taken up by means of a tensioning device; c) a transverse cut is made in this stream so as to create a parison having one free edge that is not taken up by the tensioning device; d) the parison is moved relative to the tensioning device so that the free edge of the parison is also taken up by the tensioning device; and e) at least one longitudinal cut is made in the parison over its entire length. Equipment suitable for implementing this process.

Abstract: Process for manufacturing a plastic fuel tank (FT) equipped with an internal accessory, by molding a parison using a mold comprising two cavities and a core, said process comprising the following steps: the parison is introduced into the mold cavities; the core is introduced inside the parison, the core having first been fitted with the accessory; the mold is closed so that the cavities come into leaktight contact with the core; the parison is pressed against the cavities by blowing through the core and/or applying a vacuum behind the cavities; the accessory is fastened to the parison by snap riveting using a device attached to the core; the mold is opened to withdraw the core; and the final molding of the parison is carried out by blow molding and/or thermoforming.

Abstract: Process for fastening an accessory to a hollow body obtained by molding a molten plastic parison, this fastening taking place by snap-riveting with the aid of a tool during the actual molding of the parison, according to which, before carrying out the snap-riveting, the parison is locally deformed so as to surround the snap-riveting zone with a dome, the snap-riveting zone being also in relief (hollow) compared to the rest of the accessory.

Abstract: Process for fastening an accessory to a hollow body obtained by molding a molten plastic parison and using a plastic connector comprising coupling means for the accessory and a stop surface intended to limit the penetration of the connector into the molten plastic, according to which the stop surface is provided with a curved double lip (or one-piece part having two concentric curved edges, i.e., two protuberances located preferably at its periphery, which are concentric and are in relief relative to the remainder of the part) and the connector is welded to the inner wall of the parison using this double lip.