US3516614A - Process and device for winding up threads - Google Patents

Process and device for winding up threads Download PDF

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Publication number
US3516614A
US3516614A US716774A US3516614DA US3516614A US 3516614 A US3516614 A US 3516614A US 716774 A US716774 A US 716774A US 3516614D A US3516614D A US 3516614DA US 3516614 A US3516614 A US 3516614A
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US
United States
Prior art keywords
bobbin
thread
winding
radius
point
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US716774A
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English (en)
Inventor
Gunther Bauer
Jakob Bucher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hoechst AG
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Hoechst AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hoechst AG filed Critical Hoechst AG
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Publication of US3516614A publication Critical patent/US3516614A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/02—Winding and traversing material on to reels, bobbins, tubes, or like package cores or formers
    • B65H54/40—Arrangements for rotating packages
    • B65H54/42—Arrangements for rotating packages in which the package, core, or former is rotated by frictional contact of its periphery with a driving surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • FIG. 1 PROCESS AND DEVICE FOR WINDING UP THREADS Filed March 28, 1968 .4 Sheets-Sheet 1 FIG. 1
  • the present invention provides a process for winding up a drawn synthetic thread on a tube with a substantially constant tension of the thread during the winding operation. During the winding operation the length of the free thread between the point where it leaves the element which brings about a traverse motion of the thread and the point where it meets the bobbin does not change or changes only slightly.
  • the present invention relates to the winding up of threads with a substantially constant winding tension.
  • a uniform winding tension is desirable during winding.
  • a uniform winding tension promotes uniformity in the properties of the thread, for example, the degree of shrinkage, dyestuif affinity and elastic modulus.
  • a constant winding tension is favoured from the point of view of safety; if the tension is too low the thread often winds round the driving drum instead of building up the bobbin.
  • a thread is wound up a certain length thereof is free between the point where the thread leaves the traversing element, for example the outer surface of a split drum, and the point Where it is wound on the bobbin. In this specification this length of thread is referred to as the drag length. In the usual winding processes the drag length changes as the bobbin is built up, i.e. during the winding operation.
  • the present invention is based on the observation that the winding tension remains constant during winding when the drag length is maintained constant. Absolute constancy of the drag length is preferred, but the Winding tension is still sufficiently constant when, during winding, the drag length increases by at most one quarter of its initial length and decreases by at most one tenth of its initial length.
  • FIGS. 1-4 are schematic illustrations of various arrangements exemplifying the principles of this invention.
  • FIG. 1 shows, diagrammatically, a thread being wound on a bobbin 1 driven by a driving drum 2 with traverse motion of a thread 3 brought about by a split drum 4.
  • 1M is the centre of the bobbin 1 R is the respective radius of the bobbin 1 M, is the centre of the driving drum 2 R, is the radius of the driving drum 2 M is the centre of the split drum 4 R is the inner radius of the split drum 4 and R is the outer radius of the split drum 4
  • the thread 3 leaves the circle drawn round M at a distance R at B and leaves the split drum at D.
  • the thread 3 meets the bobbin at E.
  • the distance between points D and E corresponds to the free length of the thread, i.e. the drag length L which, according to the present invention, should be maintained constant. With an increasing diameter of the bobbin during winding the position of its centre changes.
  • the position of the centre of the bobbin M is the intersection of two circles drawn round M, and M so that if the radii of these circles are known for any given value of R the position of M can be found.
  • the radius of the circle round M is equal to the sum of the radius of the driving drum R, plus the respective radius of the bobbin R,,,.
  • the radius of the circle round M is the hypotenuse of a right-angled triangle between points M C and M which can be constructed for any position of the points B, D and B.
  • the triangle M BD is congruent for each position of D on the outer circumference of the split drum because the inner radius R and the outer radius R are constant and the right angle between the thread 3 and the inner radius of the split drum R is always maintained at B. BD is therefore constant and as, according to the present invention, L is to be maintained constant, the short side CM of the triangle M CM is constant during the whole winding operation.
  • the process of the invention is easy to carry out on an industrial scale because numerous devices can be used for guiding the centre of the bobbin on a path as stipulated by the conditions specified above.
  • a device comprising a split drum for giving traverse motion to the thread, a driving drum and a tube set on a bobbin holder.
  • the bobbin built up on the tube is driven by the driving drum.
  • the bobbin holder is fitted in a known manner on a swingable lever.
  • the length of the lever and the position of its point of rotation are chosen in such a manner that the circle described by the centre of the bobbin during the winding operation substantially approaches the optimum hyperbolic orbit for the initial drag length used and is situated within the zone limited by the two outer hyperbolas.
  • the length of the lever arm and the position of its point of rotation can be readily determined from three points of the optimum hyperbolic orbit by construction of the circle described by the centre of the bobbin as the point of intersection of two lines, each line perpendicularly bisecting a chord drawn between two of the three points chosen.
  • the process of the invention can be carried out with a device in which the movable bobbin holder is fitted on a swingable lever eccentrically supported in known manner or by any other means suitable for guidance along the required path.
  • a constant drag length L and a constant winding tension may be maintained by guiding the centre of the bobbin M on a straight line.
  • This method of maintaining a constant drag length may be used when the inner radius of the split drum R and the radius of the driving drum R are equal. This is shown on FIG. 3.
  • the straight line representing the course of the centre of the bobbin M is perpendicular to the line between the centres of the driving drum M, and the split drum M
  • the process of the invention can also be carried out with known devices in which with an increasing diameter of the bobbin the bobbin is not moved away from the driving drum but the driving drum is moved while the axis of the bobbin remains in a constant position.
  • the driving drum can only drive those bobbins which start simultaneously winding the thread.
  • the conditions stipulated above must be suitably adapted.
  • Other devices can also be used to carry out the process of the invention, for example a device in which the bobbin is directly driven by a split drum with omission of the driving drum.
  • FIG. 4 Such a mode of execution of the process is illustrated in FIG. 4.
  • D is the point where the thread leaves the traversing thread guide (which corresponds to the point where the thread leaves the split drum).
  • a zone is established between a straight line 8 (see FIG. 4), which is by the distance W L below the thread guide 6, and a straight line 9, which is by the distance L below the thread guide 6.
  • the path of the centre of the bobbin should be situated within this zone.
  • the centre of the bobbin M describes an arc of a circle, i.e. with the use of a swingable lever, the radius and the centre of the circle can be determined in the manner described above.
  • the extreme case of such a circular path is a path 10 of the centre of the bobbin M marked in FIG. 4.
  • winding of the bobbin starts at the intersection of the straight line 7 (which is below the traversing thread guide by the distance L with a circle round M having the radius R +R
  • the circular path 10 touches the straight line 8 situated below the traversing thread guide 6 at a distance L
  • the straight line 9 which is situated below traversing thread guide 6 at the distance L with a circle round M having the radius R +R
  • a circle complying with these conditions has the radius R.
  • a process for winding up a drawn synthetic thread on a tube with traverse motion of the thread and driving of the building bobbin with a driving drum, with substantially constant winding tension wherein, during winding, the length of the free thread between the point where it leaves the traversing element and the point where it meets the bobbin increases by at most one quarter of its initial value and decreases by at most one tenth of its initial value, and wherein the traverse motion of the thread is brought about by a split drum and the centre of the bobbin is guided on a path situated between two hyperbolas which are constructed point by point with an increasing radius of the bobbin as intersection of two circles, one circle drawn round the centre of the driving drum with a radius corresponding to the sum of the radius of the driving drum plus the respective radius of the bobbin, the other circle drawn round the centre of the split drum with a radius equal to the hypotenuse of a right-angled triangle, one short side of which is formed by the sum of the inner radius of the split drum plus the respective radius of the bobbin and
  • a device as set forth in claim 3 wherein the bobbin holder is mounted on the swingable lever, the length of the lever and the position of its point of rotation being determined from three points of the optimum hyperbola by construction of the circle described by the centre of the bobbin as the point of intersection of two lines, each line perpendicularly bisecting a chord drawn between two of the three points chosen.

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  • Winding Filamentary Materials (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
US716774A 1967-04-07 1968-03-28 Process and device for winding up threads Expired - Lifetime US3516614A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF0052061 1967-04-07

Publications (1)

Publication Number Publication Date
US3516614A true US3516614A (en) 1970-06-23

Family

ID=7105141

Family Applications (1)

Application Number Title Priority Date Filing Date
US716774A Expired - Lifetime US3516614A (en) 1967-04-07 1968-03-28 Process and device for winding up threads

Country Status (8)

Country Link
US (1) US3516614A (de)
BE (1) BE713375A (de)
CH (1) CH483978A (de)
DE (1) DE1660319A1 (de)
ES (1) ES352449A1 (de)
FR (1) FR1561631A (de)
GB (1) GB1225527A (de)
NL (1) NL6804193A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861607A (en) * 1970-08-14 1975-01-21 Barmag Barmer Maschf High-speed cross-winding device
US4451006A (en) * 1982-04-07 1984-05-29 Verdol S.A. Package-lifting system in an unwinding or twisting machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2752100A (en) * 1954-02-02 1956-06-26 Foster Machine Co Yarn winding machine
US2811317A (en) * 1951-05-03 1957-10-29 John Bright & Brothers Ltd Machine for winding threads or the like
US3008658A (en) * 1960-02-15 1961-11-14 Du Pont Winder with constant distance between package and guide roll
US3009661A (en) * 1960-06-24 1961-11-21 Du Pont Improved textile yarn windup mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2811317A (en) * 1951-05-03 1957-10-29 John Bright & Brothers Ltd Machine for winding threads or the like
US2752100A (en) * 1954-02-02 1956-06-26 Foster Machine Co Yarn winding machine
US3008658A (en) * 1960-02-15 1961-11-14 Du Pont Winder with constant distance between package and guide roll
US3009661A (en) * 1960-06-24 1961-11-21 Du Pont Improved textile yarn windup mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861607A (en) * 1970-08-14 1975-01-21 Barmag Barmer Maschf High-speed cross-winding device
US4451006A (en) * 1982-04-07 1984-05-29 Verdol S.A. Package-lifting system in an unwinding or twisting machine

Also Published As

Publication number Publication date
FR1561631A (de) 1969-03-28
GB1225527A (de) 1971-03-17
BE713375A (de) 1968-10-08
DE1660319A1 (de) 1972-04-06
NL6804193A (de) 1968-10-08
CH483978A (de) 1970-01-15
ES352449A1 (es) 1969-12-16

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