Abstract:
A process for making an insulated conductor in accordance with the present invention includes extruding an insulative material onto a conductor and subsequently rolling the insulative material on the conductor to a prescribed thickness. The extruding step comprises extruding the insulative material to a thickness of about 0.0025 inch to about 0.0035 inch, and the rolling step comprises rolling the insulative material to a thickness of about 0.00125 to about 0.00315 inch.
Abstract:
Twin metal billets (31) are fed to dual circumferential grooves (44) formed in a rotary wheel (43), and are advanced to a die (21) which has a die opening with a circumferentially discontinuous, annular cross section. The metal merges in the die opening and exits therefrom in the form of a slit tube (34, 36). The tube is advanced over a forming member (38) to form a flat strip (39). As the tube is advanced over the forming member, an alignment system (300) maintains the tube in a centred position. The alignment system includes a light source (302a, b) disposed within the tube and two arrays of photo-transistors (308) arranged to receive light from the light source, the amount of light sensed by each array being a function of the position of the slit in the tube relative to a desired position. Any difference results in a steering roll (318) in contact with the outer surface of the tube pivoting in a direction which will bring the tube back into alignment.
Abstract:
Twin metal billets (31) are fed to dual circumferential grooves (44) formed in a rotating wheel (43). The billets are advanced first to a edge-shaped gap which deforms the billets and are then advanced to a die (63). The die has a die opening with a circumferentially discontinuous, annular cross section. The metal from each billet merges in the die opening and exits therefrom in the form of a slit tube (34). The tube is then opened and flattened to form a flat strip (39) by advancing the slit tube over a forming member (38) having a progressively increasing width.
Abstract:
Twin metal billets (31) are fed to dual circumferential grooves (44) formed in a rotating wheel (43). The billets are advanced first to a edge-shaped gap which deforms the billets and are then advanced to a die (63). The die has a die opening with a circumferentially discontinuous, annular cross section. The metal from each billet merges in the die opening and exits therefrom in the form of a slit tube (34). The tube is then opened and flattened to form a flat strip (39) by advancing the slit tube over a forming member (38) having a progressively increasing width.
Abstract:
Twin metal billets (31) are fed to dual circumferential grooves (44) formed in a rotary wheel (43), and are advanced to a die (21) which has a die opening with a circumferentially discontinuous, annular cross section. The metal merges in the die opening and exits therefrom in the form of a slit tube (34, 36). The tube is advanced over a forming member (38) to form a flat strip (39). As the tube is advanced over the forming member, an alignment system (300) maintains the tube in a centred position. The alignment system includes a light source (302a, b) disposed within the tube and two arrays of photo-transistors (308) arranged to receive light from the light source, the amount of light sensed by each array being a function of the position of the slit in the tube relative to a desired position. Any difference results in a steering roll (318) in contact with the outer surface of the tube pivoting in a direction which will bring the tube back into alignment.
Abstract:
A process for making an insulated conductor in accordance with the present invention includes extruding an insulative material onto a conductor and subsequently rolling the insulative material on the conductor to a prescribed thickness. The extruding step comprises extruding the insulative material to a thickness of about 0.0025 inch to about 0.0035 inch, and the rolling step comprises rolling the insulative material to a thickness of about 0.00125 to about 0.00315 inch.
Abstract:
Deux billettes de métal semblables (31) sont introduites dans deux rainures circonférentielles (44) formées dans une roue en rotation (43). Les billettes sont amenées à avancer d'abord vers un interstice en forme de coin, lequel les déforme, puis à avancer jusqu'à une matrice (63). Celle-ci présente une ouverture ayant une section transversale annulaire circonférentiellement discontinue. Le métal de chacune des billettes conflue dans l'ouverture de la matrice et sort par cette ouverture sous la frome d'un tube fendu (34). On ouvre ensuite le tube fendu et on l'aplatit pour former une bande plate (39), en le faisant avancer sur un élément de formage (38) ayant une largeur croissant progressivement.