A mask that protects the edges of the gear teeth of a gear during a particle impacting process, such as a shot peen or other similar process, without preventing the particle impacting process from effectuating advantageous hardening and other results for areas that are not protected by the mask. The cover may be removable and reusable. The mask may include a closed end and an open end, with a plurality of protective vanes extending between the two ends. The gear may be received within the mask and aligned and secured such that the vanes cover the gear teeth edges, thereby protecting the edges from the particle impact process, without preventing the particle impacting process with regard to other portions of the gear teeth.

A mask that protects the edges of the gear teeth of a gear during a particle impacting process, such as a shot peen or other similar process, without preventing the particle impacting process from effectuating advantageous hardening and other results for areas that are not protected by the mask. The cover may be removable and reusable. The mask may include a closed end and an open end, with a plurality of protective vanes extending between the two ends. The gear may be received within the mask and aligned and secured such that the vanes cover the gear teeth edges, thereby protecting the edges from the particle impact process, without preventing the particle impacting process with regard to other portions of the gear teeth.

A method for removing from a terrain (T) a buried longitudinal portion (P) of a substantially cylindrical pipe made of a ductile material and of a type suitable for use in oil pipelines, water pipelines, gas pipelines or the like, which method comprises steps of: digging at least an excavation (S1, S2) in the terrain (T), at a longitudinal end (P1, P2) of the buried portion (P) to be removed, such as to make the end accessible; making at least a through-cut in the wall of the portion (P) of pipe to be removed, so as to obtain at least a strip having two opposite longitudinal edges which define a width of the strip that is smaller than a circumference of a wall of the portion (P) of pipe; taking the strip and removing it from the terrain, passing it through the excavation (S1, S2); and obstructing the underground volume that has housed the portion (P) of the pipe (P) and the excavation (S1, S2) with filler material. The invention also relates to a cutting machine comprising: a cutting part (11), entirely insertable in said portion of pipe (P), comprising cutting means (41) for making at least a through-cut in the wall of the portion of pipe; and a support part (12), for supporting the cutting part (11), also entirely insertable in the portion of pipe (P), and comprising abutting means (31, 32, 33) for contemporaneously abutting, at a plurality of points, an internal surface of the portion of pipe so as to engage the machine (1) to the portion of pipe (P) to be cut.

A method for removing from a terrain (T) a buried longitudinal portion (P) of a substantially cylindrical pipe made of a ductile material and of a type suitable for use in oil pipelines, water pipelines, gas pipelines or the like, which method comprises steps of: digging at least an excavation (S1, S2) in the terrain (T), at a longitudinal end (P1, P2) of the buried portion (P) to be removed, such as to make the end accessible; making at least a through-cut in the wall of the portion (P) of pipe to be removed, so as to obtain at least a strip having two opposite longitudinal edges which define a width of the strip that is smaller than a circumference of a wall of the portion (P) of pipe; taking the strip and removing it from the terrain, passing it through the excavation (S1, S2); and obstructing the underground volume that has housed the portion (P) of the pipe (P) and the excavation (S1, S2) with filler material. The invention also relates to a cutting machine comprising: a cutting part (11), entirely insertable in said portion of pipe (P), comprising cutting means (41) for making at least a through-cut in the wall of the portion of pipe; and a support part (12), for supporting the cutting part (11), also entirely insertable in the portion of pipe (P), and comprising abutting means (31, 32, 33) for contemporaneously abutting, at a plurality of points, an internal surface of the portion of pipe so as to engage the machine (1) to the portion of pipe (P) to be cut.

Provided is an equipment system for producing a piercing-rolling plug to be used for producing a seamless steel tube/pipe, which includes a shotblasting device for applying shotblasting on a surface of the plug, and an arc-spraying device for performing arc-spraying of iron wires on a surface of a base metal of the plug to which the shotblasting is applied, so as to form a film containing oxide and Fe thereon. The arc-spraying device includes plural spraying booths each of which separately forms part of the film in turn in each of sections into which the surface of the base metal of the plug is divided along an axial direction of the plug. The production efficiency of the plug can therefore be maintained at a high level, and steady enhancement of the durability life of the plug can be realized during the piercing-rolling.

Provided is an equipment system for producing a piercing-rolling plug to be used for producing a seamless steel tube/pipe, which includes a shotblasting device for applying shotblasting on a surface of the plug, and an arc-spraying device for performing arc-spraying of iron wires on a surface of a base metal of the plug to which the shotblasting is applied, so as to form a film containing oxide and Fe thereon. The arc-spraying device includes plural spraying booths each of which separately forms part of the film in turn in each of sections into which the surface of the base metal of the plug is divided along an axial direction of the plug. The production efficiency of the plug can therefore be maintained at a high level, and steady enhancement of the durability life of the plug can be realized during the piercing-rolling.

A blast processing device includes a first nozzle, a second nozzle, and a moving mechanism. The first nozzle blasts a blasting material toward a workpiece, using first compressed air. The second nozzle blasts second compressed air for adjusting a diffusion range of the blasting material. The moving mechanism moves the first nozzle and the second nozzle over the workpiece.

A blast processing device includes a first nozzle, a second nozzle, and a moving mechanism. The first nozzle blasts a blasting material toward a workpiece, using first compressed air. The second nozzle blasts second compressed air for adjusting a diffusion range of the blasting material. The moving mechanism moves the first nozzle and the second nozzle over the workpiece.

Invention is a cleaning assembly for cleaning a tire curing mould comprising a turntable (20) mounted on a base plate (12); a cleaning arm (50) extending on the turntable (20) in a movable manner and configured to blow dry ice, and an insulation hood (60) surrounding the cleaning arm (50) wherein the base plate (12) is having an adapter support (16) configured to be gradually widen or narrow for being adapted to the insulation hoods with different diameters on the base plate.

Invention is a cleaning machine for tire curing sidewall (80) that comprises a basket (10), a rotational base (20) which mounted into thereof, a nozzle (60) provided in a movable manner on the rotational base (20), of extending towards the open side of the basket (10) and having an intake (63) connected to inlet (62) in a fluid transferrable manner. The cleaning machine comprises a rotating joint (40) which mounted radially to the outward direction on the rotational base (20) and a telescopic arm (50) which carrying the nozzle (60) at the free end thereof and which of fastened on a rotational base (20) with the rotating joint (40).