Abstract: A pipeline butt welding machine has support means, a first vise assembly and a second vise assembly associated with the support means and adapted to engage respectively a first and a second tubular element to be joined by welding; at least one of the vise assemblies being movable relative to the other between a position of maximum mutual distance and a position of minimum mutual distance; the mobile vise unit being operatively connected to at least one fluid-dynamic cylinder comprising a casing and a piston slidingly housed within the casing and defining in the casing a first and a second mutually variable volume chamber. The welding machine has a fluid-dynamic circuit configured to feed fluid under pressure simultaneously to the first and second chambers and to control the motion of the movable vise assembly as a function of a pressure difference between the first and second chambers.

Abstract: A clamp, particularly for apparatuses for welding pipes, including a lower jaw and an upper jaw that are mutually opposite and hinged; each jaw is substantially made of plastic material; advantageously, each jaw includes a portion made of plastic material and at least one insert constituted by an interlocking metallic structure that is co-molded within the portion made of plastic material.

Abstract: A chuck for gripping and moving cylindrical bodies, in particular fittings and pipe segments, including a main body defining an axis of rotation and a plurality of jaws fastened to the main body. The jaws are movable between a position of maximum closure, in which they are at the minimum distance from the axis of rotation, to a position of maximum opening, in which they are at the maximum distance from the axis of rotation. The chuck can adjust the positions of maximum closure and maximum opening and can move the jaws between the positions of maximum closure and maximum opening. The chuck also allows for the axial fixing of the chuck to a support member and for a connection of the chuck to the support member so that they are angularly rotatable with respect to each other.

Abstract: An alignment and fastening device for welding pipes and fittings having guiding means, a first clamp unit and a second clamp unit respectively engaging a first tubular element and a second tubular element to be joined by means of a welding; at least one between the first clamp unit and the second clamp unit is movable with respect to the other, by means of handling means, from a distant position to a close welding position; friction means curb the relative motion between the first and the second clamp units.

Abstract: A welding machine, comprising a base supporting an alignment and fastening device; the alignment and fastening device has guiding means, a first clamp unit and a second clamp unit, respectively engaging a first tubular element and a second tubular element to be joined by welding; at least one of the first clamp unit and said second clamp unit move with respect to each other, from a distant position to a close welding position; the base is associated with a heating device for welding the first and second tubular elements; the aligning and fastening device is an autonomous component and is mechanically connected and disconnected to/from the base; the aligning and fastening device is switched from a first operational configuration, in which the aligning and fastening device is interconnected to the welding machine, to a second operational configuration, in which the aligning and fastening device is used as a stand-alone device.

Abstract: A pipe processing apparatus, for forming branches on pipes made of thermoplastic material, including a base adapted to be fastened to the outer wall of a pipe and a supporting structure which extends from the base; a support member is slidingly associated with the supporting structure and is adapted to receive an interchangeable processing/handling means configured to interact with the pipe; the apparatus also includes a movement means which engages the support member in order to move it on command along a processing axis. The supporting structure includes a single elongated structural element.

Abstract: A pipe cutting apparatus has a rigid annular frame adapted to be coupled to a pipe to be cut. A cutting blade for cutting the pipe is removably associated with the annular frame. A mechanism is included to move the cutting blade with respect to the annular frame about an axis of revolution designed to coincide with a longitudinal axis of the pipe.

Abstract: A container for heating plates for butt welding pipes has one or more walls forming at least one receptacle for containing a heating plate; an insulation means surrounds the receptacle and is adapted to thermally insulate the receptacle from the surrounding environment.

Abstract: A self-propelled welding machine for butt welding pipes, comprising a chassis having a traction means which allows its movement along a direction of travel; the chassis supports a welding apparatus comprising a first clamping unit and a second clamping unit, adapted to respectively engage a first tubular element and a second tubular element to be joined by welding; a device for milling the ends of the first and second tubular elements and a heating plate for welding the ends are associated or associable with the welding apparatus; the particularity of the self-propelled welding machine resides in that it comprises at least one first blade associated with a first end of the chassis; the first blade is arranged transversely with respect to the direction of travel and is movable with respect to the chassis.

Abstract: A hand extruder, particularly for welding parts made of plastics, has a main body which supports an extrusion means for the extrusion of plastic material, an actuation means actuating the extrusion means, a heating means heating the plastic material, a preheating means preheating parts to be welded, and a control means controlling the hand extruder; a grip detachably connected to the main body by an interconnection means preset to pass from a coupling configuration, in which the grip is joined to the main body, to an uncoupling configuration, in which the grip is separated from the main body; the interconnection means has an electrical mating means of the plug-socket type electrically and detachably connecting at least part of the means supported by the main body to an electrical control means arranged on the grip.

Abstract: A pipe processing apparatus, for forming branches on pipes made of thermoplastic material, including a base adapted to be fastened to the outer wall of a pipe and a supporting structure which extends from the base; a support member is slidingly associated with the supporting structure and is adapted to receive an interchangeable processing/handling means configured to interact with the pipe; the apparatus also includes a movement means which engages the support member in order to move it on command along a processing axis. The supporting structure includes a single elongated structural element.

Abstract: A chuck for gripping and moving cylindrical bodies, in particular fittings and pipe segments, including a main body defining an axis of rotation and a plurality of jaws fastened to the main body; the jaws are movable between a position of maximum closure, in which they are at the minimum distance from the axis of rotation, to a position of maximum opening, in which they are at the maximum distance from the axis of rotation; the chuck has an adjuster means for adjusting the positions of maximum closure and maximum opening and a movement means for moving the jaws between the positions of maximum closure and maximum opening; the chuck includes a fixing means adapted to allow the axial fixing of the chuck to a support member and the connection of the chuck to the support member so that they are angularly rotatable with respect to each other.

Abstract: A hand extruder, particularly for welding parts made of plastics, has a main body which supports an extrusion means for the extrusion of plastic material, an actuation means actuating the extrusion means, a heating means heating the plastic material, a preheating means preheating parts to be welded, and a control means controlling the hand extruder; a grip detachably connected to the main body by an interconnection means preset to pass from a coupling configuration, in which the grip is joined to the main body, to an uncoupling configuration, in which the grip is separated from the main body; the interconnection means has an electrical mating means of the plug-socket type electrically and detachably connecting at least part of the means supported by the main body to an electrical control means arranged on the grip.

Abstract: A multiple tool device, particularly adapted to prepare tubular elements to be welded by electrofusion, comprising a cup member which is associable with the end portion of a tubular element and is provided with motion transmission means adapted to turn the multiple tool device. The particularity of the present invention resides in that it comprises scraper means adapted to remove the outer surface layer of the end portion and facing means which have a working motion that is opposite with respect to the preceding means and are adapted to face the edge of the end portion so as to make it perpendicular to the axis of the tubular element.

Abstract: An improved clamp for locking pipes and/or cylindrical bodies in general, including at least one first jaw that is associatable with a supporting structure, a second jaw, and an articulation means interposed between the first jaw and the second jaw in order to allow the relative rotation of the two jaws about a tilting axis, between an open configuration and a closed configuration in which the two jaws form a substantially circular locking seat. The particularity of the present invention resides in that the clamp includes an elastic means that is functionally connected to the two jaws and is adapted to facilitate their opening and/or closure.

Abstract: A multiple tool device, particularly adapted to prepare tubular elements to be welded by electrofusion, comprising a cup member which is associable with the end portion of a tubular element and is provided with motion transmission means adapted to turn the multiple tool device. The particularity of the present invention resides in that it comprises scraper means adapted to remove the outer surface layer of the end portion and facing means which have a working motion that is opposite with respect to the preceding means and are adapted to face the edge of the end portion so as to make it perpendicular to the axis of the tubular element.

Abstract: An adapter for pipe locking clamps, particularly but not exclusively useful for welding portions of plastic piping by polyfusion. The adapter has at least two bodies obtained from a metal plate, and arranged parallel to each other. The bodies have respective circular arc-like lateral rims that have a same radius of curvature. The centers of curvature of the circular arc-like lateral rims are all arranged on a same axis so as to form a partially cylindrical concave surface forming an open cradle which is adapted to lock the pipes in cooperation with a similar surface formed on a complementary and opposite reduction unit.

Abstract: An adapter for pipe locking clamps, particularly but not exclusively useful for welding portions of plastic piping by polyfusion. The adapter has at least two bodies obtained from a metal plate, and arranged parallel to each other. The bodies have respective circular arc-like lateral rims that have a same radius of curvature. The centers of curvature of the circular arc-like lateral rims are all arranged on a same axis so as to form a partially cylindrical concave surface forming an open cradle which is adapted to lock the pipes in cooperation with a similar surface formed on a complementary and opposite reduction unit.

Abstract: A locking vise for pipes, useful in operations for welding portions of plastic pipe by polywelding of the head portion. The vise comprises two mutually opposite jaws which form, when clamped, a circular locking seat for a portion of pipe. A slot is formed on the grip surface of each jaw in order to accommodate a corresponding portion of a body for reducing the diameter of the circular locking seat of the pipes. Elements for fixing to the corresponding jaw are further associated with each reduction body. The fixing elements comprise at least one locking pin, which can perform an axial translational motion and is inserted through the slot transversely to the slot. The locking pin has, in the axial direction, a first part, which forms, when arranged in the slot, an undercut for preventing extraction for the reduction body, and a second part, which is recessed with respect to the first part and forms, when arranged in the slot, a disengagement configuration for the reduction body.

Abstract: An extruder for welding plastic components, comprising a front part for plasticizing and ejecting additional plastic welding material, and a rear part, for feeding and breaking up a continuous filament made of the additional plastic material. The rear part comprises a feed channel that cooperates with a worm screw for the advancement of the filament. The feed channel is delimited by the thread of the worm screw on one side and by a sliding surface for the filament on the opposite side. The distance between the sliding surface and the crest of the thread decreases in the direction in which the filament is fed, in order to provide scoring of increasing depth on the filament. The thread comprises at least one discontinuity of the worm that has a sharp discontinuity end for cropping the filament at the scoring.