Abstract: A welded steel part with a very high mechanical strength is provided. The welded steel part is obtained by heating followed by hot forming, then cooling of at least one welded blank obtained by butt welding of at least one first and one second sheet. The at least one first and second sheets including, at least in part, a steel substrate and a pre-coating which includes an intermetallic alloy layer in contact with the steel substrate, topped by a metal alloy layer of aluminum or aluminum-based alloy. A method for the fabrication of a welded steel part and the fabrication of structural or safety parts for automotive vehicles are also provided.

Abstract: Apparatus for producing nonwovens, comprising a card drum (1) rotated in a first direction of rotation, a transfer cylinder (2) rotated in a second direction of rotation opposite to the first direction of rotation, at least one doffer (3, 4), at least one condenser (5, 6), at least one stripper roll (7, 8), a first endless conveyor belt (9), a suction drum (10) and a second endless conveyor belt (10).

Abstract: A water extraction facility comprising a suction box having a suction opening and a chamber (9) arranged above the suction opening by means of a connector (21) and a perforated sheet metal element (24) creating head loss is mounted in the connector (21).

Abstract: An installation for drying a non-woven web includes a device (10, 11), a diffusion chamber (10) having an outlet fitting (21) in which there is mounted a perforated sheet (24) creating a drop in pressure.

Abstract: An installation for drying a web of non-woven material includes a fan (6), a heating oven (3), an outlet pipe (C2) which puts the outlet of the oven (3) in communication with the intake of the fan (6), a branch pipe (C3) branching from the inlet pipe (C1) upstream of the heat source (4) putting the pipe (C1) in communication with the inlet of a drying device (10, 11), a pipe (C4) for the extraction of air from the drying device (10, 11) and a humidity level probe (13) mounted in the extraction pipe (C4).

Abstract: A water extraction facility comprising a suction box having a suction opening and a chamber (9) arranged above the suction opening by means of a connector (21) and a perforated sheet metal element (24) creating head loss is mounted in the connector (21).

Abstract: An installation for drying a non-woven web includes a device (10, 11), a diffusion chamber (10) having an outlet fitting (21) in which there is mounted a perforated sheet (24) creating a drop in pressure.

Abstract: An installation for drying a non-woven web includes a device (10, 11), a diffusion chamber (10) having an outlet fitting (21) in which there is mounted a perforated sheet (24) creating a drop in pressure.

Abstract: An installation for drying a non-woven web includes a device (10, 11), a diffusion chamber (10) having an outlet fitting (21) in which there is mounted a perforated sheet (24) creating a drop in pressure.

Abstract: An installation for drying a web of non-woven material includes a fan (6), a heating oven (3), an outlet pipe (C2) which puts the outlet of the oven (3) in communication with the intake of the fan (6), a branch pipe (C3) branching from the inlet pipe (C1) upstream of the heat source (4) putting the pipe (C1) in communication with the inlet of a drying device (10, 11), a pipe (C4) for the extraction of air from the drying device (10, 11) and a humidity level probe (13) mounted in the extraction pipe (C4).

Abstract: The invention concerns an installation for producing a spunbonded fabric web comprising a diffuser defining for the filaments a passage with diverging cross-section, and mounted a certain distance from the slot attenuator, and a conveyor for receiving the filaments coming out of the diffuser. The uniformity of the web is enhanced by means of a device separating the filaments by electrostatic process mounted at a higher level than the bottom of the passage.

Abstract: The invention concerns an installation for producing a spunbonded fabric web comprising a diffuser defining for the drawn filaments a passage with diverging cross-section, and mounted a certain distance from the slot attenuator, and a conveyor receiving the filaments coming out of the diffuser. The uniformity of the web is enhanced by means of a device separating the filaments from each other by electrostatic process mounted at a higher level higher than the bottom of the passage.

Abstract: The invention concerns a device for opening and distributing a bundle of filaments when producing a nonwoven textile web by a technique which consists in: extruding melted organic polymer through a die perforated with holes, so as to form a bundle or curtain of filaments; then directing the extruded filaments by drawing by means of one or several fluid jets; and finally, receiving the bundle of filaments in the form of a web on a mobile conveyor belt. The invention is characterised in that it consists of an assembly arranged downstream of the outlet of the drawing assembly and separate therefrom, said assembly comprising, arranged in the proximity of the drawing slot outlet, a diffuser comprising an intake zone shaped as a convergent nozzle extending over the whole width of the installation opposite the drawing slot outlet producing the web, extended by a divergent nozzle, said assembly being associated with a ramp electrostatically charging the filaments before they are received on the receiving belt.

Abstract: The invention concerns an installation for producing a spunbonded fabric web comprising a diffuser (6) defining for the drawn filaments a passage with diverging cross-section and an conveyor (7) receiving the filaments coming out of the diffuser. The uniformity of the web is enhanced by means of a device separating the filaments from one another by electrostatic process mounted at a higher level higher than the bottom of the passage.

Abstract: The invention concerns an installation for producing a spunbonded fabric web comprising a diffuser (6) defining for the filaments a passage with diverging cross-section and a conveyor (7) for receiving the filaments coming out of the diffuser. The uniformity of the web is enhanced by means of a device separating the filaments by electrostatic process mounted at a higher level than the bottom of the passage.

Abstract: A mechanism for the treatment of materials by pressurized water jets includes a body (1) for supplying water under pressure which includes a feeding chamber (2) extending over the whole length of the body, and wherein water under pressure is fed to the feeding chamber through a filter (4). The body also includes a distributing zone for distributing water under pressure over a whole treatment length against a plate (7) provided with micro-perforations which define water needles (8) directed against the surface (S) of the material to be treated. The material is supported by a carriage element subjected to a suction source eliminating the treatment water.

Abstract: The invention concerns a device comprising a body (1) supplying water under pressure comprising a feeding chamber (2) extending over the whole length of said body, and wherein is fed, through a filter (4), water under pressure; a distributing zone, distributing water under pressure over the whole treatment length against a plate (7) provided with micro-perforations, whereof the orifices define water needles (8) directed against the surface (S) of the material to be treated, the material being supported by a carriage element subjected to a suction source eliminating the treatment water.