EP 1261543 A2 20021204 - METHOD FOR MAKING TAPERED YARN WINDINGS
Title (en)
METHOD FOR MAKING TAPERED YARN WINDINGS
Title (de)
VERFAHREN ZUM HERSTELLEN VON KONISCHEN WICKELN FADENFÖRMIGEN GUTES
Title (fr)
PROCEDE DE FABRICATION D'ENROULEMENTS TRONCONIQUES DE FIL
Publication
Application
Priority
- FR 0001800 W 20000628
- FR 9909506 A 19990722
Abstract (en)
[origin: FR2796631A1] To produce a bobbin with a truncated cone shape, yarn is wound in overlapping layers around a cylindrical bobbin sleeve (20) on a longitudinal axis (X). The bobbin has a main body (11) with one end (12) in a truncated cone with the generating line (L2) at an angle against the axis (X). The bobbin has a truncated cone shape at the other end (13) of the main body (11) with a generating line (L3) at an angle to the axis (X). The shape of the main body (11) of the bobbin is in a truncated cone shape with the generating line (L1), at an angle to the axis (X), connecting the generating lines (L2,L3) of the bobbin end shapes (12,13). The base cone (12) has a base (12a) with a diameter (D1) which is larger than the diameter (D2) of the base (13a) of the cone structure at the other end. The two cone bases (12a,13a) form the boundaries of the bobbin body end cone sections (11a,11b). The generating lines (L2,L3) of the end cones (12,13) are pitched at an acute angle ( alpha , beta ) against the axis (X). The angle ( alpha ) at the first cone end (12) is 40-75 deg and the angle ( beta ) at the other cone end (13) is 30-60 deg . The wound yarn is placed around the bobbin in two overlaid coils, with an intersection angle between their orientation of 0.5-6.0 deg . The bobbin length is 150-500 mm, between the extremities (12b,13b) of the end cone sections (12,13). An Independent claim is included for a bobbin winding operation where the yarn is guided while the bobbin is rotated so that the center bobbin body (11) is flanked by two conical sections (12,13) of different dimensions. The yarn guide action has two different effects, to start the shape of one conical end (12) and finish the shape of it to start the winding to form the center body (11) and the other conical end (13). Preferred Features: The first phase of the yarn guide movement is a reciprocating motion parallel to the bobbin axis (X) between an initial position and a final position at the outer ends of the conical sections (12,13) on a vertical projection through the bobbin sleeve (20). During the bobbin development, the change-over points at the ends of the reciprocating stroke movements are shifted inwards to give the conical end shapes until each end zone has achieved the required diameter. During the second yarn guide phase, the end points of the reciprocating stroke movements are at the inner ends of the flanking conical zones, to form the center section. During the development of the center section, one end point is shifted inwards, to give the required taper to the center section of the bobbin. During the first and second winding phases, the shifts in the end positions are by an equal length. The yarn guide is shifted, in the second phase, to combine the movement parallel to the bobbin axis (X) with a complementary movement at right angles to the bobbin axis (X) so that its line of travel is parallel to the angled generating line (L1) of the center body (11) of the bobbin. The movement patterns are set by an electronic drive control system. The yarn guide is rotated mechanically, parallel to the generating line (L1) of the center section (11), as a cam with a variable rotary speed. The bobbin spindle has a variable rotary speed. The yarn guide has a variable speed of travel, parallel to the bobbin axis (X).
IPC 1-7
IPC 8 full level
B65H 54/28 (2006.01); B65H 54/32 (2006.01); B65H 55/04 (2006.01)
CPC (source: EP KR US)
B65H 54/325 (2013.01 - EP US); B65H 55/04 (2013.01 - EP KR US); B65H 2701/3122 (2013.01 - EP US)
Citation (search report)
See references of WO 0107350A2
Designated contracting state (EPC)
BE DE ES FR GB IT
DOCDB simple family (publication)
FR 2796631 A1 20010126; FR 2796631 B1 20010817; BR 0012586 A 20020618; CA 2377262 A1 20010201; CN 1373732 A 20021009; CZ 2002258 A3 20020417; CZ 303847 B6 20130529; DE 60027779 D1 20060608; DE 60027779 T2 20070426; EP 1261543 A2 20021204; EP 1261543 B1 20060503; JP 2003524562 A 20030819; KR 20020020762 A 20020315; MX PA01013335 A 20030904; TW 518310 B 20030121; US 6929211 B1 20050816; WO 0107350 A2 20010201; WO 0107350 A3 20021003
DOCDB simple family (application)
FR 9909506 A 19990722; BR 0012586 A 20000628; CA 2377262 A 20000628; CN 00810721 A 20000628; CZ 2002258 A 20000628; DE 60027779 T 20000628; EP 00946031 A 20000628; FR 0001800 W 20000628; JP 2001512445 A 20000628; KR 20017016852 A 20011228; MX PA01013335 A 20000628; TW 89114650 A 20000803; US 3157402 A 20020501