An arrangement of an elongated element wound on a spool is presented. The elongated element has a leading end having a bent part and an unbent part. The bent part further having a beginning part and a trailing end. The leading end is positioned on the core of the spool and the bent part deviates at least for a part from a winding direction. The elongated element further forms subsequent windings in the winding direction on the core. At least one of the subsequent windings is wound over the beginning part of the bent part while an adhesive is provided to fix the trailing end of the bent part on the core simultaneously thereby securing elongated element on the spool.

An arrangement of an elongated element wound on a spool is presented. The elongated element has a leading end having a bent part and an unbent part. The bent part further having a beginning part and a trailing end. The leading end is positioned on the core of the spool and the bent part deviates at least for a part from a winding direction. The elongated element further forms subsequent windings in the winding direction on the core. At least one of the subsequent windings is wound over the beginning part of the bent part while an adhesive is provided to fix the trailing end of the bent part on the core simultaneously thereby securing elongated element on the spool.

An overlapping and progressive forming method for a high-performance multi-element NiAl-based alloy tubular part, including: winding continuously flexible substrates of Ni and Al, and alloying coating continuously or selectively along a width direction or a rolling direction to obtain coated flexible substrates; winding continuously the coated flexible substrates on an outer surface of a core roller according to a sequence of Ni above and Al below to form a Ni/Al laminated structure having a plurality of layers with an outermost layer being a Ni layer, and consolidating with ultrasonic with assistance of a pulse current to combine the continuously wound flexible substrates into a laminated tube blank; and placing the laminated tube blank into a mold, applying a pulse current to both ends of the laminated tube blank for hot fluid high-pressure forming, and synthesizing in-situ to prepare the tubular part with assistance of the pulse current.

An apparatus (100) for making a coil (B) comprises a feed unit (2) configured to feed at least one strip-shaped article (N) and a winding unit (1). The winding unit includes a plurality of winding heads (10) and a movement device for moving (3) said winding heads (10) configured to displace said winding heads (10) along a working path (P). Each winding head (10) is configured to wind said strip-shaped article (N) so as to make said coil (B) during a displacement, carried out by said movement device (3), of the winding head (10) along an operative segment (P1) of the working path (P).

Manufacturing machine (9) and method for manufacturing a cylindrical electrochemical cell (2) consisting of a spiral winding of a composite material (8) comprising at least two conductor bands (4, 6) and at least two separator bands (5, 7) overlapping one another. They are provided: a plurality of winding heads (13), each of which supports a holding device (14) which is configured to grab an end of the composite material (8) and to rotate on itself around a first rotation axis (15) so as to obtain a spiral winding of the composite material (8); a drum (11) which supports the winding heads (13) and is rotatably mounted to rotate with a continuous law of motion about a second rotation axis (12) so as to move the winding heads (13) along a processing path (P2); a feeding unit (10) configured to feed the composite material (8) to the winding heads (13); and a cutting device (28) which is configured to cut the composite material (8) and thereby create a new free end of the composite material (8) while the composite material (8) is still being wound by a first winding head (13). A second winding head (13), which follows the first winding head (13) along the processing path (P2), is configured to grab the new free end of the composite material (8) and start the winding of the composite material (8) while first winding head (13) is still completing the winding of its own composite material (8).

Manufacturing machine (9) and method for manufacturing a cylindrical electrochemical cell (2) consisting of a spiral winding of a composite material (8) comprising at least two conductor bands (4, 6) and at least two separator bands (5, 7) overlapping one another. They are provided: a plurality of winding heads (13), each of which supports a holding device (14) which is configured to grab an end of the composite material (8) and to rotate on itself around a first rotation axis (15) so as to obtain a spiral winding of the composite material (8); a drum (11) which supports the winding heads (13) and is rotatably mounted to rotate with a continuous law of motion around a second rotation axis (12) so as to move the winding heads (13) along a processing path (P2); and a feeding unit (10) configured to feed the composite material (8) to the winding heads (13). A segment of the processing path (P2) is substantially straight and each holding device (14) is configured to grab one end of the composite material (8) and hence start the spiral winding of the composite material (8) while the corresponding winding head (13) moves along the substantially straight segment of the processing path (P2).

A take-up device includes a fluid-pressure device, a pressure detection device, a pressure calculation mechanism, and a controller. The fluid-pressure device is a device for expanding and contracting a mandrel. The pressure detection device detects a pressure of a hydraulic fluid in the fluid-pressure device. The pressure calculation mechanism calculates a tightening pressure acting on the mandrel, based on the pressure detected by the pressure detection device. The controller controls the fluid-pressure device. Also, the controller performs position control until the number of turns of a strip reaches a value. The controller performs constant-pressure control after the number of turns of the strip reaches the value.

A take-up device includes a fluid-pressure device, a pressure detection device, a pressure calculation mechanism, and a controller. The fluid-pressure device is a device for expanding and contracting a mandrel. The pressure detection device detects a pressure of a hydraulic fluid in the fluid-pressure device. The pressure calculation mechanism calculates a tightening pressure acting on the mandrel, based on the pressure detected by the pressure detection device. The controller controls the fluid-pressure device. Also, the controller performs position control until the number of turns of a strip reaches a value. The controller performs constant-pressure control after the number of turns of the strip reaches the value.

A transport system has a dedicated trailer for transporting a small transport reel (i.e., <18-ft in diameter) of continuous rod to the field. The trailer has a pedestal that can pivot the reel. A hub motor on the pedestal can turn the reel, and a transfer unit and rod bender on the trailer can curve or straighten the rod when being fed into or out of the reel. A power and hydraulic system operates the various hydraulic components on the trailer. In other aspects, the transport system includes stands that can hold the small transport reels on a trailer within a defined transport envelope. When empty, these stands can be stacked on top of one another on the trailer for return to a facility.

A transport system has a dedicated trailer for transporting a small transport reel (i.e., <18-ft in diameter) of continuous rod to the field. The trailer has a pedestal that can pivot the reel. A hub motor on the pedestal can turn the reel, and a transfer unit and rod bender on the trailer can curve or straighten the rod when being fed into or out of the reel. A power and hydraulic system operates the various hydraulic components on the trailer. In other aspects, the transport system includes stands that can hold the small transport reels on a trailer within a defined transport envelope. When empty, these stands can be stacked on top of one another on the trailer for return to a facility.