US3483593A - Drawing apparatus - Google Patents

Drawing apparatus Download PDF

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Publication number
US3483593A
US3483593A US537559A US3483593DA US3483593A US 3483593 A US3483593 A US 3483593A US 537559 A US537559 A US 537559A US 3483593D A US3483593D A US 3483593DA US 3483593 A US3483593 A US 3483593A
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US
United States
Prior art keywords
yarn
plate
rolls
heated
feed roll
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
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US537559A
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English (en)
Inventor
Alan Michael John Marlborough
Arthur Gordon Waldie
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Imperial Chemical Industries Ltd
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Imperial Chemical Industries Ltd
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Publication date
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
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Publication of US3483593A publication Critical patent/US3483593A/en
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
    • D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
    • D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
    • D02J1/225—Mechanical characteristics of stretching apparatus
    • D02J1/226—Surface characteristics of guiding or stretching organs

Definitions

  • This invention relates to the drawing of synthetic thermoplastic filaments and in particular to an improvement in the apparatus used for said drawing wherein the apparatus includes feed and draw rolls and a heated plate.
  • Drawing or elongation of synthetic thermoplastic filaments in the solid state, is required to orient the macromolecules comprising the filaments thereby imparting strength to the filaments.
  • Several types of drawing apparatus have been devised for carrying out the elongation step.
  • One commonly used method is to feed the undrawn yarn around a rst roller, usually referred to as the feed roller, then over and in contact with a stationary heated plate to a second roller, usually referred to as the draw roller, rotating at a higher peripheral speed than the first roller.
  • the first roller is usually heated to facilitate elongation of the filaments and sufficient wraps of filamentary yarn are taken around the feed roll such that substantially all the drawing takes place before the yarn leaves the feed roll.
  • the hot plate usually serves to facilitate the completion of any remaining elongation and to heat set the yarn thereby reducing the shrinkage of the drawn yarn, when subsequently subjected to heat treatment, the ratio of the peripheral speed of the draw roller to that of the feed roller is termed the draw ratio.
  • drawing apparatus for synthetic thermoplastic filamentary yarns comprising a yarn supply, means for feeding the yarn from the yarn supply to a feed roll or rolls, a draw roll or rolls rotating at a higher peripheral speed than said feed roll or rolls and a heated plate intermediate the feed and draw rolls, wherein means is also provided for moving the yarn to and fro across the face of the heated plate.
  • Movement of the yarn across the face of the heated plate may be obtained by means of any one of Several types of yarn traverse device, as for example cam and follower to which a yarn guide is attached directly or through a suitable mechanical linkage, or by pneumatic means, by means of which the yarn is caused to reciprocate over a short stroke.
  • the traverse device may be placed before the feed roll or intermediate the feed roll and the heated surface. We prefer to place it before the feed roll in order that only undrawn yarn, which is less subject to damage than drawn yarn, should come in contact with the traverse device.
  • a traverse device of constant short stroke is placed before the feeding means.
  • the pressure at the nip of the c0- operating rolls which is necessary to ensure uniform supply of yarn to the drawing machine, movement to and fro of the yarn is not transmitted further than the nip 0f these rolls and has no effect upon wear of or build-up of organic residues upon the heated plate. Consequently for satisfactory operation of such drawing machines it is desirable to incorporate an additional traversing means according to this invention.
  • the kind of reciprocating motion imparted to the yarn ⁇ may be simple or complex and we prefer to use a two component motion wherein a primary reciprocation is superimposed upon a slower secondary reciprocation.
  • ⁇ wear of the heated surface over long periods takes the form of a smooth concave track in the surface. This is preferred to the form of Wear obtained with a simple single reciprocation wherein a track having sharper edges (at the extremes of the traverse stroke) is formed.
  • FIGURE 1 is a diagrammatic representation of one position of a multiposition drawframe.
  • FIGURE 2 is a diagrammatic representation of an hydraulic-pneumatic means for producing an oscillatory motion
  • FIGURE 3 is a diagrammatic representation of a linkage translating the oscillatory motion to reciprocating motion of a yarn guide.
  • the position comprises a yarn feeding means consisting of two cooperating rolls 1 and 2, the upper one 1, having a resilient rubber surface, a yarn guide 3, for moving the yarn to and fro according to the invention, positioned between the yarn feeding means 1, 2 and a heated feed roll 4, whereon drawing of the yarn is to take place.
  • a heated metal plate 5, is situated below the feed roll 4, and before a draw roll 6, which may or may not be heated.
  • a yarn guide 7 and yarn collection means 8 are included to complete the position.
  • undrawn yarn Y is fed from the nip between rolls 1 and 2, by ⁇ way of the guide 3 to the feed roll 4 around which it is taken a number of times such that drawing is substantially complete when the yarn leaves roll 4 and passes to the hotplate 5 whereon any small amount of drawing is completed and heat setting is effected, the yarn then passing to and around the draw roll 6.
  • the draw roll 6 rotates at a higher peripheral speed than the feed roll 4 and thereby provides the required drawing tension, a suflicient number of turns being taken around the roll 6 such that yarn slippage is substantially prevented.
  • Drawn, set yarn from the draw roll 6 is guided by guide 7 to the collection means 8 which may be a ring-rail type of collector which inserts twist in the collecting yarn.
  • apparatus for producing a complex oscillatory motion comprises a compresed air supply control valve 9, Which controls the air supply to a junction 10, whence air is supplied to a double acting valve 11, and to two single acting spring loaded valves 12 and 13. Valves 12 and 13 are attached in spaced apart relationship to a carriage 14 which is slidably engaged inside rail portions 15, of a base plate 16.
  • a cam 17 is located within a cavity in carriage 14 and is turned in a stepwise manner by means of a needle clutch 18 actuated by a lever arm 19 Which is pivotally attached by rod 20 to arm 21.
  • Arm 21 oscillates about bearing 22 and to one end is ixed a hammer head 23 and to the other end is attached a piston rod 24 connected to pneumatic and hydraulic pistons inside a pneumatichydraulic valve 25.
  • Valve 25 consists of a double acting pneumatic section 26 and a hydraulic section 27.
  • Air is supplied to both sides of a piston in the pneumatic section 26 from the valve 11, and the hydraulic section 27, which also contains a piston on the common shaft 24, is connected through regulating valves 28, 29 and one way valves 30, 31 to a reservoir 32 the internal pressure within which is regulated by means of a spring loaded piston 33.
  • a shaft (not shown), connected to arm 21 at the bearing 22, transfers the oscillatory motion of arm 21 through the linkage of FIGURE 3 to the yarn guide 3.
  • the apparatus is set in motion by opening control valve 9 which opening may be effected manually or electrically, as for example, by using a solenoid operated control valve 9.
  • Compresed air is then supplied to juntion and passes through valve 11 to either the left or right hand side of the piston in the pneumatic section 26 of valve 25 pushing it towards the opposite end of its stroke.
  • This movement causes the shaft 24 to be pushed outwards or inwards with a movement which is damped by the passage of oil from section 27 through a regulator valve 28 or 29, through reservoir 32 and back through the second regulator 29 or 28 to the other side of the piston in the hydraulic section 27 of valve 25.
  • Movement of shaft 24 causes arm 21 to move about bearing 22 so that head 23 contacts valve 12 or 13 momentarily opening it.
  • Opening of valve 12 or 13 causes a pulse of compressed air supplied to the valve from junction 10, to enter valve 11 and the piston therein to be displaced from one end to the other, this displacement in turn causing the air supplied from junction 10 to be passed to the opposite side of the piston in section 26 of valve 25 from that to which it was initially supplied thus reversing the cycle of events.
  • the primary oscillation of the shaft attached to arm 21 at bearing 22 is thus obtained by the movement of head 23 to and fro between successive contacts with valves 12 and 13.
  • the overall motion of this shaft is complex for as arm 21 moves in one direction (either to left or right) the needle clutch 18 actuated through rod 20 and lever 19, causes a small increment of rotation of cam 17 and a small sliding movement of carriage 14.
  • This movement of carriage 14 alters the position of valves 12 and 13 with respect to the bearing 22 and hence the point at which the head 23 contacts said valves. This has the effect of combining with the primary oscillation a secondary movement, of very much longer period. Movement of arm 21 in the opposite direction does not cause the needle clutch to move cam 17 as the action of the clutch is unidirectional.
  • the period of oscillation maybe adjusted by means of the regulators 28 and 29 and piston 33 acts as a buffer for oil lpulses.
  • a process for drawing synthetic thermoplastic lamentary yarns comprises feeding the yarn from a supply thereof to a feed roll or rolls, which roll or rolls may be heated or unheated, then over and in contact with a stationary hot plate of suicient length to provide the required contact time, to a ⁇ draw roll or rolls rotated at a higher peripheral speed than said feed roll or rolls to a yarn collecting means, characterised in that the yarn, is caused to reciprocate with a simple or complex motion of the foregoing type across the hot plate.
  • drawing apparatus for synthetic thermoplastic lamentary yarns of the type including a yarn supply, means for feeding y-arn from said supply, a feed roll, a draw roll rotating at a higher peripheral speed than said feed roll and a heated plate intermediate the feed and draw rolls over which the yarn passes longitudinally of -itself during operation
  • said improvement which comprises means for reducing the formation on said heated plate of ridges of partially decomposed yarn finish components, said means including a yarn guide and reciproeating drive means for imparting to said yarn guide a two component action comprising a primary reciprocation superimposed upon a slower secondary reciprocation in a manner such that the extremes of primary and secondary reciprocation overlap slightly.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US537559A 1965-03-25 1966-03-25 Drawing apparatus Expired - Lifetime US3483593A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12752/65A GB1090299A (en) 1965-03-25 1965-03-25 Drawing apparatus

Publications (1)

Publication Number Publication Date
US3483593A true US3483593A (en) 1969-12-16

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ID=10010473

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Application Number Title Priority Date Filing Date
US537559A Expired - Lifetime US3483593A (en) 1965-03-25 1966-03-25 Drawing apparatus

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US (1) US3483593A (US20090163788A1-20090625-C00002.png)
BE (1) BE678478A (US20090163788A1-20090625-C00002.png)
DE (1) DE1941399U (US20090163788A1-20090625-C00002.png)
GB (1) GB1090299A (US20090163788A1-20090625-C00002.png)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651631A (en) * 1969-09-19 1972-03-28 Zinser Textilmaschinen Gmbh Arrangement for traversing a yarn in two directions
US3762147A (en) * 1971-07-15 1973-10-02 Rieter Ag Maschf Apparatus of relaxing drawn high-polymeric filament threads
WO2015176982A1 (de) * 2014-05-21 2015-11-26 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum abziehen und verstrecken einer synthetischen fadenschar

Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2199411A (en) * 1938-11-01 1940-05-07 Du Pont Artificial structure and method for producing same
US2272666A (en) * 1937-10-23 1942-02-10 Du Pont Process of dry spinning artificial thread
US2278888A (en) * 1938-11-02 1942-04-07 Du Pont Artificial structure and process for producing same
US2289232A (en) * 1939-07-14 1942-07-07 Du Pont Method and apparatus for producing filamentary structures
FR1194142A (US20090163788A1-20090625-C00002.png) * 1959-11-06
US2920345A (en) * 1955-06-03 1960-01-12 Eastman Kodak Co Method and apparatus for producing variable denier yarn
US2975474A (en) * 1958-06-11 1961-03-21 Du Pont Process and apparatus for preparing novelty yarns
US2977745A (en) * 1958-05-13 1961-04-04 Hudson Hosiery Company Method of and apparatus for treating textile strands
US2993260A (en) * 1958-02-20 1961-07-25 American Enka Corp Differentially heated draw pin
US2993333A (en) * 1961-07-25 Production of twist lively thread
GB893076A (en) * 1959-09-18 1962-04-04 British Nylon Spinners Ltd Machine for cold-drawing synthetic filaments
US3137033A (en) * 1960-10-07 1964-06-16 Algemene Kunstzijde Unie Nv Apparatus for drawing thread-shaped products
GB1002750A (en) * 1963-07-17 1965-08-25 Japan Exlan Co Ltd Method and apparatus for stretching thermoplastic synthetic fibres
US3302385A (en) * 1961-08-26 1967-02-07 Ruddell James Nelson Modification of filaments
US3343207A (en) * 1963-10-14 1967-09-26 Monsanto Co Novelty yarn apparatus
US3351991A (en) * 1964-09-14 1967-11-14 Allied Chem Adjustable heater bracket assembly
US3363295A (en) * 1964-10-21 1968-01-16 British Nylon Spinners Ltd Process for making variable denier yarn

Patent Citations (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1194142A (US20090163788A1-20090625-C00002.png) * 1959-11-06
US2993333A (en) * 1961-07-25 Production of twist lively thread
US2272666A (en) * 1937-10-23 1942-02-10 Du Pont Process of dry spinning artificial thread
US2199411A (en) * 1938-11-01 1940-05-07 Du Pont Artificial structure and method for producing same
US2278888A (en) * 1938-11-02 1942-04-07 Du Pont Artificial structure and process for producing same
US2289232A (en) * 1939-07-14 1942-07-07 Du Pont Method and apparatus for producing filamentary structures
US2920345A (en) * 1955-06-03 1960-01-12 Eastman Kodak Co Method and apparatus for producing variable denier yarn
US2993260A (en) * 1958-02-20 1961-07-25 American Enka Corp Differentially heated draw pin
US2977745A (en) * 1958-05-13 1961-04-04 Hudson Hosiery Company Method of and apparatus for treating textile strands
US2975474A (en) * 1958-06-11 1961-03-21 Du Pont Process and apparatus for preparing novelty yarns
GB893076A (en) * 1959-09-18 1962-04-04 British Nylon Spinners Ltd Machine for cold-drawing synthetic filaments
US3137033A (en) * 1960-10-07 1964-06-16 Algemene Kunstzijde Unie Nv Apparatus for drawing thread-shaped products
US3302385A (en) * 1961-08-26 1967-02-07 Ruddell James Nelson Modification of filaments
GB1002750A (en) * 1963-07-17 1965-08-25 Japan Exlan Co Ltd Method and apparatus for stretching thermoplastic synthetic fibres
US3343207A (en) * 1963-10-14 1967-09-26 Monsanto Co Novelty yarn apparatus
US3351991A (en) * 1964-09-14 1967-11-14 Allied Chem Adjustable heater bracket assembly
US3363295A (en) * 1964-10-21 1968-01-16 British Nylon Spinners Ltd Process for making variable denier yarn

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3651631A (en) * 1969-09-19 1972-03-28 Zinser Textilmaschinen Gmbh Arrangement for traversing a yarn in two directions
US3762147A (en) * 1971-07-15 1973-10-02 Rieter Ag Maschf Apparatus of relaxing drawn high-polymeric filament threads
WO2015176982A1 (de) * 2014-05-21 2015-11-26 Oerlikon Textile Gmbh & Co. Kg Vorrichtung zum abziehen und verstrecken einer synthetischen fadenschar
CN106460234A (zh) * 2014-05-21 2017-02-22 欧瑞康纺织有限及两合公司 用于抽出和牵伸合成纱束的装置

Also Published As

Publication number Publication date
DE1941399U (de) 1966-06-30
GB1090299A (en) 1967-11-08
BE678478A (US20090163788A1-20090625-C00002.png) 1966-09-26

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