US3292230A - Stuffing box crimper - Google Patents

Stuffing box crimper Download PDF

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Publication number
US3292230A
US3292230A US426201A US42620165A US3292230A US 3292230 A US3292230 A US 3292230A US 426201 A US426201 A US 426201A US 42620165 A US42620165 A US 42620165A US 3292230 A US3292230 A US 3292230A
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United States
Prior art keywords
tow
walls
box
spaced opposed
channel
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Expired - Lifetime
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US426201A
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English (en)
Inventor
Cech Miloslav
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.)
Elitex Zavody Textilniho
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Elitex Zavody Textilniho
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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

  • Ciaims. (Cl. 281)
  • the present invention is concerned with the inner arrangement of the stuffing box of a machine for crimping synthetic fibre tows.
  • the stufiing boxes hitherto known for crimping synthetic fibre tows with a great number of fibres have usually a rectilinear section, into which a synthetic fibre tow is pressed by means of a pair of pressure rollers, situated in front of the stuffing box.
  • the stutfing box is usually provided with a tiltable lid for opening and closing the outlet of the box and thereby controlling the pressure in the stufiing box, whereby the number of crimps in one unit length of the synthetic fibre tow is controlled.
  • the crimped synthetic fibre tow leaves the stulfing box for further processing.
  • the stufiing box itself consists substantially of two side walLs joined by top and bottom walls. The inwardly directed surfaces of the side, top and bottom walls of said stuiiing box are smooth.
  • the resulting considerable friction against these side walls causes their abrasion by the synthetic fibre tow, resulting in failure and down-time of the crimping machine.
  • the pressure rollers To press the synthetic fibre tow into the stuffing box, i.e. to overcome the undesirable pressure in the stufiing box, the pressure rollers must exert high pressure which in turn necessitates a considerable input of electric power.
  • the crimping machine is very sensitive to the penetration of knots, bunching of the material, and the like which press the pressure rollers away from each other and thereby cause irregularity in the pressure in the stufling box and which in turn results in low quality crimped synthetic fibre tow. Variations of the pressure in the stufling box are also indicated by slacks in the incoming fibre tow in front of the pressure rollers, causing an irregular operation of the crimping machine.
  • the present invention is concerned with overcoming said disadvantages inasmuch as the inwardly directed surfaces of the top as well as the bottom wall are provided with one or more longitudinal grooves having advantageously a square, rectangular or semi-circular section.
  • the advantage of a stufling box according to the present invention resides in the decrease of pressure exerted on the side walls of the stufiing box. Tests have shown regularity of pressure inside the stuffing box even when knots and the like penetrate into it. Furthermore, the crimp regularity of the synthetic fibre tow has been greatly improved. The tests proved, moreover, high sensitivity of the lid adjustment with respect to the number of crimps. Another advantage resides in the substantially diminished "ice wear of the side walls. The drop in the pressure exerted on the side walls also permits reduction of the force necessary for pressing the fibre tow into and through the stuffing'box, said pressure drop resulting in diminishing the force input necessary for the novel box by comparison with a conventional stuffing box with smooth inner walls.
  • FIG. 1 represents a diagrammatic longitudinal section of the stuffing box with the pressure rollers and FIG. 2 a cross section of the stufiing box shown in FIG. 1.
  • the stuffing box consists substantially of two side walls 1 and 2 arranged in parallel with one another and engaging near the entrance of the stufiing box the pair of pressure rollers 3 and 4.
  • the interior space or crimping chamber 7 is further defined by the bottom wall 5 and the top wall 6, these latter walls being fixed to the side walls e.g. by means of screws (not shown).
  • a lid 9 is secured to the top wall 6 at the outlet end of the box, and is tiltable about a pivot point 8 against the action of a spring 10 whose one end is connected to the lid 9 and whose other end is secured to a bracket 11 which in turn is fixed to the top wall 6.
  • the inner surface of bottom wall 5 is provided with at least one, and preferably with two longitudinal grooves 12.
  • top wall 6 is provided with at least one, and preferably with two grooves 13.
  • the width of the longitudinal grooves 12 and 13 is advantageously chosen in such a way that if the bottom wall 5 and the top wall 6 are each provided with only one groove 12 and 13, respectively, the distance between the side faces 14 of the grooves 12 or 13 and the side walls 1, 2 of the stufiing box is shorter than the spacing between the respective side faces 14 of each groove 12 or 13. If a higher number of longitudinal grooves 12, 13 is provided in the walls 5 and 6, the distance between the side walls 1 and 2 of the stuffing box and the two most distant side faces 14 of the grooves is smaller than the spacing between these side faces 14 of the individual grooves 12 or 13.
  • the grooves 12, 13 can be e.g. square, rectangular, semi-circular, etc.
  • the grooves 12, 13 start near the edges 16 and 17 of top wall 6 and bottom wall 5, respectively, and end at or in the proximity of the outlet of the box.
  • the stufling box is connected with the frame 20 of the crimping machine, in which two pressure rollers 3 and 4 are mounted on the shafts 21 and 22, said pressure rollers being driven by a driving mechanism (not shown), e.g. an electric motor.
  • a driving mechanism e.g. an electric motor.
  • the device according to the present invention works as follows:
  • the synthetic fibre tow (not shown) is pressed by means of the pressure rollers 3 and 4 into the crimping chamber 7 of the stufiing box, where it is folded by the pressure, generated by the continuous feeding of additional fibre tow in such a way that so-called crimps are formed on the individual fibres. While this crimping occurs, the tow passes through the crimping chamber 7 of the stuffing box toward the outlet and leaves the chamber 7 by being pressed out below the lid 9. It is then ready for further processing.
  • the pressure exerted by the following tow fed by the pressure rollers 3 and 4 causes the tow in chamber 7 to fill the entire width of the latter and to exert thereby a considerable pressure not only against bottom wall 5, top wall 6, and lid 9, but mainly against the side walls 1 and 2.
  • this pressure causes the tow to penetrate into the longitudinal grooves 12 and 13 of the walls 5 and 6 whose side faces 14 act as guide surfaces for the crimped tow and prevent movement of the synthetic fibre tow towards the side walls 1 and 2, diminishing thereby the pressure against the side walls 1, 2 and reducing the undesirable pressure in the stufiing box.
  • pressure level in the crimping chamber 7 is controlled in dependence upon the desired number of crimps per unit length of the synthetic fibre tow by changing the prestress value of spring 10 acting on lid 9.
  • the present invention can be employed in all such crimping machines for crimping synthetic fibre tows which are provided with a stufiing box comprising side walls joined by a top and a bottom wall.
  • An apparatus for crimping fibrous tow comprising a stufiing box including a pair of spaced opposed long walls and a pair of spaced opposed short walls defining a channel having an inlet and an outlet; elongated feed means located adjacent to said inlet extending in direction of said spaced opposed long walls for introducing the fibrous tow through said inlet at such rate of feed that the tow tends to accumulate and expand in all directions in said channel; yarn restraining means associated with said channel; and at least two grooves in one of said spaced opposed long walls extending in the direction from said inlet to said outlet of said channel and spaced from said spaced opposed short walls so as to impede expansion of said tow in said channel in direction towards said spaced opposed short walls, thereby preventing undesired pressure of said expanding tow against said short walls and thus reducing the friction between said short walls and said tow.
  • ROBERT R' ROBERT R'. MACKEY, Primary Examiner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
US426201A 1964-01-22 1965-01-08 Stuffing box crimper Expired - Lifetime US3292230A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CS36064 1964-01-22

Publications (1)

Publication Number Publication Date
US3292230A true US3292230A (en) 1966-12-20

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ID=5335533

Family Applications (1)

Application Number Title Priority Date Filing Date
US426201A Expired - Lifetime US3292230A (en) 1964-01-22 1965-01-08 Stuffing box crimper

Country Status (4)

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US (1) US3292230A (de)
AT (1) AT247511B (de)
DE (1) DE1660274B2 (de)
GB (1) GB1020680A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2833974A1 (fr) * 2001-12-21 2003-06-27 Superba Sa Procede et dispositif de frisage de fils
US6718603B2 (en) 2001-12-21 2004-04-13 Superba (Sa) Apparatus and method for producing frieze yarns

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE622306A (de) * 1962-09-12
US1719899A (en) * 1928-11-19 1929-07-09 Manufacturers Machinery Compan Hair-curling machine
CH316685A (de) * 1952-05-10 1956-10-31 Alexander Smith Inc Einrichtung zur Herstellung eines aus endlosen Fäden bestehenden Kräuselgarnes
US2793418A (en) * 1953-08-06 1957-05-28 Bachmann Uxbridge Worsted Corp Crimping of filaments
US3120692A (en) * 1960-06-17 1964-02-11 Eastman Kodak Co Process for the manufacture of uniformly crimped filter tow

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1719899A (en) * 1928-11-19 1929-07-09 Manufacturers Machinery Compan Hair-curling machine
CH316685A (de) * 1952-05-10 1956-10-31 Alexander Smith Inc Einrichtung zur Herstellung eines aus endlosen Fäden bestehenden Kräuselgarnes
US2793418A (en) * 1953-08-06 1957-05-28 Bachmann Uxbridge Worsted Corp Crimping of filaments
US3120692A (en) * 1960-06-17 1964-02-11 Eastman Kodak Co Process for the manufacture of uniformly crimped filter tow
BE622306A (de) * 1962-09-12

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2833974A1 (fr) * 2001-12-21 2003-06-27 Superba Sa Procede et dispositif de frisage de fils
EP1323853A1 (de) * 2001-12-21 2003-07-02 Superba (Société Anonyme) Verfahren und Vorrichtung zum Kräuseln von Fäden
US6718603B2 (en) 2001-12-21 2004-04-13 Superba (Sa) Apparatus and method for producing frieze yarns

Also Published As

Publication number Publication date
GB1020680A (en) 1966-02-23
DE1660274A1 (de) 1970-07-09
AT247511B (de) 1966-06-10
DE1660274B2 (de) 1973-09-06

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