Abstract: A method for the additive manufacturing of an object from a powder layer comprises the steps of: projecting (200) a beam of energy onto a surface of the layer of powder in the form of a spot so as to melt the powder, scanning (202) the surface with the beam of energy so that the spot travels over the surface in a movement made up of a translation in a longitudinal direction of scanning and of a wobbling movement having at least a component in a direction of wobble, and adjusting (204) the focus of the beam of energy during the scanning according to the translation in the longitudinal direction of scanning but without taking account of the component of the wobbling movement in the direction of wobble.

Abstract: A method for the additive manufacture of an object from a powder layer comprises the steps of: projection (200) of an energy beam onto a surface of the layer to form a spot; outward scanning (202) by the beam of a first zone of the surface in a longitudinal direction and orientation of the beam so that the spot travels the first zone in a trajectory comprising first loops offset in the longitudinal direction, the spot travelling each first loop in a first rotation sense; and return scanning (204) by the beam of a second zone of the surface in the longitudinal direction and orientation of the beam so that the spot travels the second zone in a trajectory comprising second loops offset in the longitudinal direction, the spot travelling each second loop in a second rotation sense opposite to the first rotation sense.

Abstract: Calendering installation for the production of a reinforcing ply (600) for a tire, which has a frame (100), two extruders (200, 300) for feeding elastomer material, a reinforcing-thread feeding device (400), a calender (500) having a first pair of counter-rotating rollers, with a first working roller (52) and a first shaping roller (51), and a second pair of counter-rotating rollers, with a second working roller (53) and a second shaping roller (54), wherein a calendaring nip (59) is formed between the working rolls (32, 53) in order to receive a first calendered rubber ply (57) delivered by the first pair of rollers (51, 52), a second calendered rubber ply (58) delivered by the second pair of rollers (53, 54), and the reinforcing threads (45) in order to supply the calendered reinforcing ply (600), which is conveyed to the outlet of the installation via GUIDE ROLLERS (62, 63).

Abstract: An apparatus for manufacturing a three-dimensional object by selective additive manufacturing comprises: a support (140) suitable for supporting at least one layer (150) of additive manufacturing powder, a laser source (110) suitable for emitting a laser beam (111), a scanning device (130) suitable for directing the laser beam onto the powder layer so as to scan at least a portion of the powder layer, and a device (120) for modulating the scanning trajectory, arranged upstream of the scanning device, the modulating device comprising a modulating mirror (121) suitable for reflecting the laser beam emitted by the laser source and for directing it towards the scanning device, the angle of incidence of the laser beam emitted by the laser source on the modulating mirror being between 20 and 45°.

Abstract: A system is provided for placement of noise attenuating foam along an inside surface of a tire to attenuate cavity noise. The system can be used with tires of various sizes and shapes such that different foam sizes may be utilized. The system provides for automating the process of foam placement in a manner that allows for consistent placement of the foam during e.g., tire manufacture.

Abstract: Method for manufacturing a green tire by winding a carcass reinforcement ply onto a tire-building drum on which a number of profiled elements are axially spaced apart one from one another and have a given thickness of which the meridian line has a curved profile are laid, wherein: the front edge of the carcass reinforcement ply is grasped with the aid of a transport device having a chassis that supports a transverse row of ply gripping pads, the carcass reinforcement ply is transferred between a supply station and drum, the front edge of said ply is laid on the tire-building drum, said transport device is withdrawn, an applicator roller having a deformable profile is applied to the front edge of said ply and pressure is exerted in the radial direction across the width of said ply, and said drum is made to rotate.

Abstract: Calendering installation for the production of a reinforcing ply (600) for a tire, which has a frame (100), two extruders (200, 300) for feeding elastomer material, a reinforcing-thread feeding device (400), a calender (500) having a first pair of counter-rotating rollers, with a first working roller (52) and a first shaping roller (51), and a second pair of counter-rotating rollers, with a second working roller (53) and a second shaping roller (54), wherein a calendering nip (59) is formed between the working rolls (52, 53) in order to receive a first calendered rubber ply (57) delivered by the first pair of rollers (51, 52), a second calendered rubber ply (58) delivered by the second pair of rollers (53, 54), and the reinforcing threads (45) in order to supply the calendered reinforcing ply (600), which is conveyed to the outlet of the installation via guide rollers (62, 63).

Abstract: A method for manufacturing a raw blank of a tyre includes using a calender to produce a ply. The calender includes two rollers with a gap situated therebetween. A ply that includes a first rubber material is formed in the gap of the calender, with a bead of the first rubber material being formed upstream of the gap. The bead and the gap of the calender are fed with a second rubber material, different from the first rubber material, to form at least one insert in the ply.

Abstract: A system is provided for placement of noise attenuating foam along an inside surface of a tire to attenuate cavity noise. The system can be used with tires of various sizes and shapes such that different foam sizes may be utilized. The system provides for automating the process of foam placement in a manner that allows for consistent placement of the foam during e.g., tire manufacture.

Abstract: Variable-diameter tire-building drum intended for the manufacture of a green tire having a generally cylindrical receiving surface formed of radially mobile sectors and bearing elements the radially external part of which constitutes the receiving surface, the receiving surface comprising at least one circular groove containing an elastic circumferential sleeve which is held radially away from the bottom of the groove by pushers able to move radially with respect to the mobile sectors so as to align the radially external surface of the sleeve with the receiving surface when the drum is brought to a first laying diameter, and which is pressed against the bottom of the groove under the effect of circumferential elastic tensions when the drum is placed at a laying diameter greater than the said first laying diameter.

Abstract: Method for manufacturing a green tire by winding a carcass reinforcement ply onto a tire-building drum on which a number of profiled elements are axially spaced apart one from one another and have a given thickness of which the meridian line has a curved profile are laid, wherein: the front edge of the carcass reinforcement ply is grasped with the aid of a transport device having a chassis that supports a transverse row of ply gripping pads, the carcass reinforcement ply is transferred between a supply station and drum, the front edge of said ply is laid on the tire-building drum, said transport device is withdrawn, an applicator roller having a deformable profile is applied to the front edge of said ply and pressure is exerted in the radial direction across the width of said ply, and said drum is made to rotate.

Abstract: A method for manufacturing a raw blank of a tyre includes using a calender to produce a ply. The calender includes two rollers with a gap situated therebetween. A ply that includes a first rubber material is formed in the gap of the calender, with a bead of the first rubber material being formed upstream of the gap. The bead and the gap of the calender are fed with a second rubber material, different from the first rubber material, to form at least one insert in the ply.