US3205554A - Apparatus for crimping textile strands - Google Patents

Apparatus for crimping textile strands Download PDF

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US3205554A
US3205554A US294991A US29499163A US3205554A US 3205554 A US3205554 A US 3205554A US 294991 A US294991 A US 294991A US 29499163 A US29499163 A US 29499163A US 3205554 A US3205554 A US 3205554A
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crimping
zone
yarn
output end
strand
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US294991A
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Iwnicki Kurt
David B Miller
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British Nylon Spinners Ltd
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British Nylon Spinners Ltd
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/12—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics using stuffer boxes

Definitions

  • An object of this invention is the provision of apparatus that is suitable for use in the aforementioned process; and a further object is the provision of apparatus which is an advance over known stutter-box crimping apparatus in respect of the responsiveness of its pressure-controlling system and in respect of the clean lines of the interior of the stutter-box which obviates snagging of the strands, or of filaments composing the strands, and any tendency for the crimp to be removed on withdrawal of the strand.
  • a stufler-box crimper has a divided compression chamber whose input and output end-portions are mounted so as to allow limited lengthwise movement relative to each other to occur.
  • the crimper may comprise nip-rolls, by which the strand is forced into the compression chamber, a compression chamber preferably but not necessarily of rectangular cross-section, which chamber is divided into a crimping zone end-portion and a setting zone end-portion, the latter being mounted for limited lengthwise movement relative to the former and having a strand discharging end which is restricted sufficiently to initiate a back pressure in the column of strand material within the chamber.
  • the nip-rolls are stainless steel rolls of /8 inch peripheral width, and the walls of the compression chamber are of tool steel. The nip-rolls are spaced so that their peripheries are a few thousandths of an inch apart.
  • the internal cross-section of the compression chamber is substantially uniformly rectangular throughout its length, although the area of the cross-section of the setting zone end-portion is slightly larger than that of the crimping zone end-portion.
  • the walls of the crimping zone end-portion comprise flat front and back walls spaced, at the top of the zone, some few thousandths of an inch from the sides of the nip rolls, and side walls in the form of blades whose United States Patent 0 shaped tips are closely spaced from the peripheries of the nip rolls.
  • the other ends of the blades are cut down to thin strips which can fit into the mouth of the setting zone end-portion.
  • the setting zone end-portion whose length is preferably greater than that of the crimping zone end-portion, is mounted on a simple parallel spring strip mounting so that it can adopt various closely-spaced positions relative to the crimping zone end-portions, depending on the amount of strand material within the compression chamber. Further, it is loaded with a fixed load tending to urge it towards the crimping chamber, which fixed load, comprising a counter-balance weight and a back-pressure weight when the direction of crimping is downward, is responsible for the constant control of the crimping backpressure in the crimping zone.
  • the setting zone end-portion can be mounted on guide-rods for pure vertical movement relative to the crimping zone end-portion, and a load applied as described above.
  • the strand-discharging end of the setting zone end portion is restricted by, for instance, a flap formed at the end of the front or back wall of the end-portion, which flap is directed inwardly towards the opposite wall and fixed in a given position.
  • the front or back wall can be itself constructed so that its end is shaped so as to extend inwardly in this way.
  • the advantage of a flap is that the amount of its inward extension, i.e. the angle that it makes with the length direction of the front or back wall, can be adjusted to give the optimum results with various crimping processes.
  • the walls, or some of them, of the setting zone endportion may be heated, e.g. by electrical resistance heaters, over all or part of their lengths.
  • the whole, or that portion of thet setting zone end-portion which is heated, may be enclosed within a heater jacket containing heatinsulating material.
  • the temperature of the setting zone may be thermostatically controlled at the required temperature.
  • FIGURE 1 is a front elevational view of one embodiment of the invention, shown partly in section where cut away;
  • FIGURE 2 is a side view, partly in section, of the apparatus of FIGURE 1.
  • the apparatus of this embodiment comprises nip rolls, 1, 2 each of which is driven in the directions shown by the arrows in FIGURE 1.
  • the drive is transmitted from endless bands 3, 4 (FIGURE 2) through pulley-wheels 5, 6 and gearbox 7.
  • yarns Y converge at guide 9 before being led around a portion of the periphery of feed roll 11 pivotally mounted on arm 13 and held in contact with the periphery of nip roll 2 by means of weight 15 on the end of arm 13.
  • Nip rolls 1, 2 form the entry to the crimping zone endportion which is further bounded by front wall 17, back wall 19 and side walls 21, 22.
  • Side walls 21, 22 have extensions 23, 24 at their lower ends which fit into the mouth of the setting zone end-portion, to be described below.
  • the setting zone end-portion consists of a rectangular cross-section setting chamber 25 the main length of which is enclosed within a heater jacket 27.
  • the end-portion is mounted on flexible steel spring cantilever arms 28, 29; and it is loaded, to be urged upwardly towards contact with the crimping zone end-portion, by means of weights 31 hung on the end of strand 33 passed around pulley wheel 35.
  • the discharge end of the chamber 25 is restricted by I means of hinged flap 37 adjustably fixed in a desired position by means of screw 39.
  • the front and back walls of the chamber are heated by electrical resistance heaters 41, 42, and the spaces 43, 44 within the jacket 27 may be filled with heat-insulating material.
  • the crimped yarn Y is positively withdrawn from the setting chamber 25 around pin 45 by wind-up means (not shown).
  • a stufier-box crimper consisting of a compression chamber into which yarn is forced and in which it is held under pressure, said compression chamber being divided into an input end-portion defining a crimping zone and an output end-portion defining a setting zone, said output end-portion having a restricted strand-discharging end, and said output end-portion being mounted in a manner allowing for limited lengthwise movement relative to said input end-portion.
  • a stutfer-box crirnper consisting of a compression chamber into which yarn is forced and in which it is held under pressure, said compression chamber being divided into an input end-portion defining a crimping zone and an output end-portion defining a setting zone, said output end-portion having a restricted strand-discharging end, and said output end-portion being mounted on flex 'ible cantilever arms for limited lengthwise movement relative to said input end-portion.
  • a stuifer-box crimper consisting of a compression chamberinto which yarn is forced and in which it is held under pressure, said compression chamber being divided into an input end-portion defining a crimping zone and an output end-portion defining a setting zone, said output end-portion having a restricted strand-discharging end, and said output end-portion being mounted in a manner allowing for limited lengthwise movement relative to said input end-portion and being loaded, to urge it towards said input end-portion so as to provide crimping back-pressure through'said yarn in said chamber.
  • Crimping apparatus comprising: a stutter-box compression chamber having a crimping zone defined by a yarn input end-portion and a yarn output end-portion having a yarn discharge aperture, said output end-portion being formed separately from said input end-portion and mounted for limited movement relative to said input end-portion in the plane of yarn movement; means for creating back pressure on yarn in said chamber including means for positively feeding yarn into said input endportion and means restricting said discharge aperture; and means for maintaining constant back pressure during small changes in the amount of yarn withinsaid chamber, said means including a constant load urging said output end-portion toward said input end-portion whereby small changes in the amount of yarn within said compression chamber result in small movements of said output end-portion in the plane of yarn movement.
  • said yarn input endportion has a bore defined by front, back and side walls, said side walls having extensions terminating beyond said front and back walls in the direction of yarn movement and projecting into said output end-portion, said output end-portion being slightly spaced from said input end-portion and having a bore which receives said side wall extensions, the space between said end-portions being traversed in the direction of yarn movement by said side wall extensionsand being free of front and back walls.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Description

Sept. 14, 1965 K. lWNlCKl ETAL APPARATUS FOR GRIMPING TEXTILE STRANDS 2 Sheets-Sheet 1 Filed July 15, 1963 In en 0! tJ 9 Attorneys Sept. 14, 1965 K. IWNICK] ETAL 3,205,554
APPARATUS FOR CRIMPING TEXTILE STRANDS Filed July 15, 1963 2 Sheets-Sheet 2 F/GZ.
Attorneys 3,205,554 APPARATUS FOR CRIMPENG TEXTILE STRANDS Kurt Iwnicki, Ponthir, and David B. Miller, Stanmore, England, assignors to British Nylon Spinners Limited, Pontypool, England Filed July 15, 1963, Ser. No. 294,991 Claims priority, application Great Britain, July 19, 1962, 27,714/62 6 Claims. (Cl. 28-1) The invention concerns improvements in or relating to apparatus for crimping textile strands, and it has particular reference to such apparatus comprising a stufferbox.
In the specification of an application filed on even date hereto, we have described a process for crimping textile strands, such as yarns of nylon, in which process the strands are crimped and the crimp is set, which is characterised in that the back pressure exerted on a strand at the point of crimping is maintained constant by a continuous control of such pressure effective at a location intermediate of said point of crimping and the point of initiation of pressure on the strand within the stulfer-box, and in that the crimp is set whilst the strand is under pressure within the stutter-box.
Such a process affords considerable advantages over knownprocesses for stuffer-box crimping in that a better control of both crimping uniformity and setting uniformity is allowed.
An object of this invention is the provision of apparatus that is suitable for use in the aforementioned process; and a further object is the provision of apparatus which is an advance over known stutter-box crimping apparatus in respect of the responsiveness of its pressure-controlling system and in respect of the clean lines of the interior of the stutter-box which obviates snagging of the strands, or of filaments composing the strands, and any tendency for the crimp to be removed on withdrawal of the strand.
According to the invention, a stufler-box crimper has a divided compression chamber whose input and output end-portions are mounted so as to allow limited lengthwise movement relative to each other to occur.
Thus, the crimper may comprise nip-rolls, by which the strand is forced into the compression chamber, a compression chamber preferably but not necessarily of rectangular cross-section, which chamber is divided into a crimping zone end-portion and a setting zone end-portion, the latter being mounted for limited lengthwise movement relative to the former and having a strand discharging end which is restricted sufficiently to initiate a back pressure in the column of strand material within the chamber.
Although the expression setting zone end-portion is used above, it is to be understood that this end-portion need not, in fact, be employed for setting the strand material within it, if that is not desired. The expression is used for convenience of description only, as the end-portion will normally be so employed.
In a presently preferred embodiment, the nip-rolls are stainless steel rolls of /8 inch peripheral width, and the walls of the compression chamber are of tool steel. The nip-rolls are spaced so that their peripheries are a few thousandths of an inch apart. The internal cross-section of the compression chamber is substantially uniformly rectangular throughout its length, although the area of the cross-section of the setting zone end-portion is slightly larger than that of the crimping zone end-portion.
The walls of the crimping zone end-portion comprise flat front and back walls spaced, at the top of the zone, some few thousandths of an inch from the sides of the nip rolls, and side walls in the form of blades whose United States Patent 0 shaped tips are closely spaced from the peripheries of the nip rolls. The other ends of the blades are cut down to thin strips which can fit into the mouth of the setting zone end-portion.
The setting zone end-portion, whose length is preferably greater than that of the crimping zone end-portion, is mounted on a simple parallel spring strip mounting so that it can adopt various closely-spaced positions relative to the crimping zone end-portions, depending on the amount of strand material within the compression chamber. Further, it is loaded with a fixed load tending to urge it towards the crimping chamber, which fixed load, comprising a counter-balance weight and a back-pressure weight when the direction of crimping is downward, is responsible for the constant control of the crimping backpressure in the crimping zone. Thus, small changes in the amount of strand material within the compression chamber will not lead to changes in back-pressure, and hence in the nature of crimp imparted, because such changes will be accommodated by small movements, towards or away from the crimping zone end-portion, of the setting zone endportion without alteration of the pressure exerted thereby on the strand Within the crimping zone.
Instead of being spring-mounted, however, the setting zone end-portion can be mounted on guide-rods for pure vertical movement relative to the crimping zone end-portion, and a load applied as described above.
The strand-discharging end of the setting zone end portion is restricted by, for instance, a flap formed at the end of the front or back wall of the end-portion, which flap is directed inwardly towards the opposite wall and fixed in a given position. Alternatively, the front or back wall can be itself constructed so that its end is shaped so as to extend inwardly in this way. The advantage of a flap, however, is that the amount of its inward extension, i.e. the angle that it makes with the length direction of the front or back wall, can be adjusted to give the optimum results with various crimping processes. v
The walls, or some of them, of the setting zone endportion may be heated, e.g. by electrical resistance heaters, over all or part of their lengths. The whole, or that portion of thet setting zone end-portion which is heated, may be enclosed within a heater jacket containing heatinsulating material. The temperature of the setting zone may be thermostatically controlled at the required temperature.
The invention will now be described by reference to the accompanying drawings in which FIGURE 1 is a front elevational view of one embodiment of the invention, shown partly in section where cut away; and
FIGURE 2 is a side view, partly in section, of the apparatus of FIGURE 1.
The apparatus of this embodiment comprises nip rolls, 1, 2 each of which is driven in the directions shown by the arrows in FIGURE 1. The drive is transmitted from endless bands 3, 4 (FIGURE 2) through pulley-wheels 5, 6 and gearbox 7. As shown in FIGURE 1, yarns Y converge at guide 9 before being led around a portion of the periphery of feed roll 11 pivotally mounted on arm 13 and held in contact with the periphery of nip roll 2 by means of weight 15 on the end of arm 13.
Nip rolls 1, 2 form the entry to the crimping zone endportion which is further bounded by front wall 17, back wall 19 and side walls 21, 22. Side walls 21, 22 have extensions 23, 24 at their lower ends which fit into the mouth of the setting zone end-portion, to be described below.
The setting zone end-portion consists of a rectangular cross-section setting chamber 25 the main length of which is enclosed within a heater jacket 27. The end-portion is mounted on flexible steel spring cantilever arms 28, 29; and it is loaded, to be urged upwardly towards contact with the crimping zone end-portion, by means of weights 31 hung on the end of strand 33 passed around pulley wheel 35.
The discharge end of the chamber 25 is restricted by I means of hinged flap 37 adjustably fixed in a desired position by means of screw 39. The front and back walls of the chamber are heated by electrical resistance heaters 41, 42, and the spaces 43, 44 within the jacket 27 may be filled with heat-insulating material.
The crimped yarn Y, is positively withdrawn from the setting chamber 25 around pin 45 by wind-up means (not shown).
What we claim is:
1. A stufier-box crimper consisting of a compression chamber into which yarn is forced and in which it is held under pressure, said compression chamber being divided into an input end-portion defining a crimping zone and an output end-portion defining a setting zone, said output end-portion having a restricted strand-discharging end, and said output end-portion being mounted in a manner allowing for limited lengthwise movement relative to said input end-portion.
2. A stutfer-box crirnper consisting of a compression chamber into which yarn is forced and in which it is held under pressure, said compression chamber being divided into an input end-portion defining a crimping zone and an output end-portion defining a setting zone, said output end-portion having a restricted strand-discharging end, and said output end-portion being mounted on flex 'ible cantilever arms for limited lengthwise movement relative to said input end-portion.
3. A stuifer-box crimper consisting of a compression chamberinto which yarn is forced and in which it is held under pressure, said compression chamber being divided into an input end-portion defining a crimping zone and an output end-portion defining a setting zone, said output end-portion having a restricted strand-discharging end, and said output end-portion being mounted in a manner allowing for limited lengthwise movement relative to said input end-portion and being loaded, to urge it towards said input end-portion so as to provide crimping back-pressure through'said yarn in said chamber.
4. Crimping apparatus comprising: a stutter-box compression chamber having a crimping zone defined by a yarn input end-portion and a yarn output end-portion having a yarn discharge aperture, said output end-portion being formed separately from said input end-portion and mounted for limited movement relative to said input end-portion in the plane of yarn movement; means for creating back pressure on yarn in said chamber including means for positively feeding yarn into said input endportion and means restricting said discharge aperture; and means for maintaining constant back pressure during small changes in the amount of yarn withinsaid chamber, said means including a constant load urging said output end-portion toward said input end-portion whereby small changes in the amount of yarn within said compression chamber result in small movements of said output end-portion in the plane of yarn movement.
5. Apparatus as in claim 4 in which said yarn discharge aperture is of fixed dimensions.
6. Apparatus as in claim 4 wherein said yarn input endportion has a bore defined by front, back and side walls, said side walls having extensions terminating beyond said front and back walls in the direction of yarn movement and projecting into said output end-portion, said output end-portion being slightly spaced from said input end-portion and having a bore which receives said side wall extensions, the space between said end-portions being traversed in the direction of yarn movement by said side wall extensionsand being free of front and back walls.
References Cited by the Examiner UNITED STATES PATENTS 2,865,080 12/58 Hentschel 2872 3,009,310 11/61 Murchie et al. 28---72 3,023,481- 3/62 Scragg 19--66 3,046,633 7/62 Ohashi et al. 281
FOREIGN PATENTS 316,685 10/56 Switzerland.
DONALD W. PARKER, Primary Examiner.

Claims (1)

1. A STUFFER-BOX CRIMPER CONSISTING OF A COMPRESSION CHAMBER INTO WHICH YARN IS FORCED AND IN WHICH IT IS HELD UNDER PRESSURE, SAID COMPRESSION CHAMBER BEING DIVIDED INTO AN INPUT END-PORTION DEFININGA CRIMPING ZONE AND AN OUTPUT END-PORTION DEFINING A SETTING ZONE, SAID OUTPUT END-PORTION HAVING A RESTRICTED STRAND-DISCHARGING END, AND SAID OUTPUT END-PORTION BEING MOUNTED IN A MANNER ALLOWING FOR LIMITED LENGTHWISE MOVEMENT RELATIVE TO SAID INPUT END-PORTION.
US294991A 1962-07-19 1963-07-15 Apparatus for crimping textile strands Expired - Lifetime US3205554A (en)

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GB27714/62A GB964910A (en) 1962-07-19 1962-07-19 Improvements in or relating to apparatus for crimping textile strands

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US3205554A true US3205554A (en) 1965-09-14

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AT (1) AT250552B (en)
BE (1) BE635205A (en)
CH (1) CH445011A (en)
DE (1) DE1916416U (en)
DK (1) DK106984C (en)
ES (1) ES290119A1 (en)
FI (1) FI41846C (en)
FR (2) FR1370226A (en)
GB (1) GB964910A (en)
NL (1) NL295456A (en)
SE (1) SE325662B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3300830A (en) * 1965-06-29 1967-01-31 Fiber Industries Inc Apparatus for uniformly crimping filaments
EP2792772A1 (en) * 2013-04-18 2014-10-22 SUPERBA (Société par Actions Simplifiée) Device for feeding a stuffer box with a feeding roller

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1555530A (en) * 1976-09-09 1979-11-14 Ici Ltd Process for the production of haet set crimped yarn
DE2733455C2 (en) * 1977-07-25 1982-12-30 Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid Stuffer box for texturing chemical fibers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH316685A (en) * 1952-05-10 1956-10-31 Alexander Smith Inc Device for the production of a crimped yarn consisting of endless threads
US2865080A (en) * 1953-10-28 1958-12-23 Du Pont Method and apparatus for crimping and relaxing filaments
US3009310A (en) * 1958-02-03 1961-11-21 Us Rubber Co Article and method of producing the same
US3023481A (en) * 1958-11-25 1962-03-06 Scragg & Sons Yarn crimping apparatus
US3046633A (en) * 1959-03-16 1962-07-31 Chori Co Ltd Apparatus for producing crimped thermoplastic synthetic yarns

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH316685A (en) * 1952-05-10 1956-10-31 Alexander Smith Inc Device for the production of a crimped yarn consisting of endless threads
US2865080A (en) * 1953-10-28 1958-12-23 Du Pont Method and apparatus for crimping and relaxing filaments
US3009310A (en) * 1958-02-03 1961-11-21 Us Rubber Co Article and method of producing the same
US3023481A (en) * 1958-11-25 1962-03-06 Scragg & Sons Yarn crimping apparatus
US3046633A (en) * 1959-03-16 1962-07-31 Chori Co Ltd Apparatus for producing crimped thermoplastic synthetic yarns

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3300830A (en) * 1965-06-29 1967-01-31 Fiber Industries Inc Apparatus for uniformly crimping filaments
EP2792772A1 (en) * 2013-04-18 2014-10-22 SUPERBA (Société par Actions Simplifiée) Device for feeding a stuffer box with a feeding roller

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ES290119A1 (en) 1963-12-16
DK106984C (en) 1967-04-10
BE635205A (en)
CH445011A (en) 1967-10-15
FI41846C (en) 1970-03-10
SE325662B (en) 1970-07-06
DE1916416U (en) 1965-05-26
FR1370855A (en) 1964-08-28
GB964910A (en) 1964-07-29
FI41846B (en) 1969-12-01
FR1370226A (en) 1964-08-21
AT250552B (en) 1966-11-25
NL295456A (en)

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