US1782549A - Drawing frame - Google Patents

Drawing frame Download PDF

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Publication number
US1782549A
US1782549A US1782549DA US1782549A US 1782549 A US1782549 A US 1782549A US 1782549D A US1782549D A US 1782549DA US 1782549 A US1782549 A US 1782549A
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Prior art keywords
pairs
cylinders
small
rolls
cylinder
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only

Definitions

  • the present invention relates to a drawing frame with a great number of cylinder pa rs, applicable to speed frames, ring sp nn ng frames and self-acting mules for the sp nn ng '5 of cotton and other textile fibres of similar nature.
  • Fig. 1 is a diagramof a drawlng frame with six cylinder pairs; o a
  • Fig. 2 shows the actual application of the drawmg frame to a spinning frame
  • Fig. 3 shows the drawing frame wlth eight cylinder pairs
  • Figs. 4 and 5 show drawlng frames w1th 5 or 7 pairs.
  • the drawing frame according to Figs. 1 and 2 comprises four pairs of cylinders, which may be called drawing pairs proper, and two pairs of small cylinders which we shall call 2 auxiliary pairs.
  • the cylinder pairs A-A', B--B', C-C D--D, are the drawing pairs proper.
  • the pairs aa and 6+6 are the auxiliary airs.
  • FIG. 1 and 2 The form of invention shown in Figs. 1 and 2 consists of a drawing frame comprising six cylinder pairs, of which the pair D-D is the feed pair to which the roving or slubbing is fed first; the .pair C-C' has a peripheral speed slightly 1n excess of that of the cylinders D-D' (draught 1,05 to 1,20)
  • the small drawing out that takes place betweenthese two pairs is efi'ected under abnormal reach conditions inasmuch as the distance between the tangency'lines of the two pairs is much greater than the length of the longest fibres, instead of being held between the limits corresponding "to the longest fibres of the cotton 40 to be dealt with (in the case of Fig.
  • the scanty drawing out performed between the two said pairs serves as a preliminary drawing, preparatory to the drawing proper carried out by the two following pairs, inasmuch as the said preliminary drawing removes to a large extent the noxious influence of the twist necessarily present in the roving or slubbing fed into the drawing frame.
  • the accompan ing figures ,50 show a fixed, invariable reach tween the cylinder pairs D--D and C-C'.
  • This mm. reach may be used in connection with the following cottons without distinction: Egyptian' 38 mm. cotton (Sakellaridis), Egyptian 32 mm. cotton (Ashmouni) American 32 mm. 6! cotton, and 24:- to 28 mm. American cottons. If desired, however, the machine may be so constructed that this reach may be varied, and the said c linder pairs should then be made independent and adjustable.
  • the small cylinders bb are inserted be tween the pairs B-B' and 0-0; we call them auxillary cylinders, because actually the drawing takes place only between the pairs B-B' and CG'.
  • the small cylinders b--b are revolving at the same speed as the cylinders C-C' and their duty only is to withhold the shorter fibres while the longer ones slide under the small pressure-cylinder owing tothe pulling zgztitfii exerted on themby the cylinder pairs
  • cotton these fig-- ures represent the length of the longer fibres in the lot; the large majority of the fibres, however, has a smaller length varying from 15 to 32 mm.
  • the reach between the pairs A-A' and BB as well as between the pairs B-B and C-C must of course be designed to suit the length of the longer fibres, that is, the reach should be slightly greater than the length of the longest fibres.
  • the pressure exerted by the small pressure-cylinders a' and -b must be such that the lon er fibres on which the pulling action of t e cylinders AA or BB is already exerted may slide under the said small cylinders, and that at the same time the shorter fibres may preserve their feed velocity up to the moment they too are gripped by the cylinders A-A' or B-B.
  • a great importance attaches to the weight of the small pressure-cylinders a'- and b. Their weight is closely bound to the distance between the tangency lines AA and aa, B-B' and bb'.
  • the diameter of the pressure cylinders a and I) should be a maximum; in order to obtain the various weights, one should therefore resort to different metals or to hollow cylinders.
  • the novelty of our special drawing frame accordingly consists in the use of three consecutive draughts, the 1st one being a preliminary or preparatory draught, whereas the 2nd and the 3rd are draughts proper and are carried out under the most favourable conditions, viz. with the assistance of the small auxiliar cylinders.
  • Figs. 1 and 2 are indicated with:
  • A, B, C, D iron cylinders with longitudinal fluting.
  • A, B cylinders with bushes lined with 'wool cloth or leather, positively pressed against the underlyingfluted cylindersAorB.
  • a, 72', small auxiliary pressure-cylinders may be smooth, with longitudinal fluting, flexible, or with small peripheral grooves.
  • the reach between a-a' and BB', bb' and C-G is adjustable.
  • the second, third, and fourth draughts are obtained with the assistance of the pairs of small cylinders o-c', bb', H-
  • drawin frames having 5 or 7 cylinder pairs may constructed, as shown in Figs. 4 and 5.
  • Drawing frames with more than 8 cylinder pairs may likewise be constructed (for inr stance with 9 to 12 airs). We consider it unnecessary to descrl e them, since it is only the question of adding further drawing cylinders along the corresponding small auxiliary cylinders.
  • a cotton drawing machine comprislng a pair of feeding rolls, a pair of drawing rolls spaced from said feeding rolls by a distance considerably greater than the fibre length of the cotton to be treated and having a peripheral speed slightly greater than said feeding rolls, other pans of drawing rolls beyond said first pair of drawing rolls 8 aced from adjoining pairs of drawing ro s by distances slightly greater than the fibre length of the cotton to be treated, the peripheral speeds of said pairs of increasing progressively, iliary rolls between the drawing rolls beyond the ing rolls, the lower rolls of each of said pairs of auxiliary rolls being driven at the same peripheral speed as the preceding pair of drawin rolls, the upper rolls of each of said pairs 0 auxiliary rolls being held .in position against the lower rolls by gravity onl drawin rolls and pairs 0 auxadjacent pairs of said pairs of auxiliary rolls being closely a jacnegnt to the succeeding pairs of drawing r0 (Italy), this 31st day of Signed at Milan January, 1929.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
US1782549D 1928-03-01 Drawing frame Expired - Lifetime US1782549A (en)

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IT670169X 1928-03-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4461058A (en) * 1981-05-20 1984-07-24 Officine Gauding di P. Gaudino & C. S.a.s. Drawing frames
IT202200022029A1 (it) * 2022-10-25 2024-04-25 Filatura Di Sandigliano S R L Nuovo gruppo di stiro a più zone di stiro, alimentabile con più stoppini, per macchina di filatura o filatoio, e corrispondenti nuovo filatoio e nuova tipologia di filati prodotti da un filatoio equipaggiato con tale gruppo di stiro

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4461058A (en) * 1981-05-20 1984-07-24 Officine Gauding di P. Gaudino & C. S.a.s. Drawing frames
IT202200022029A1 (it) * 2022-10-25 2024-04-25 Filatura Di Sandigliano S R L Nuovo gruppo di stiro a più zone di stiro, alimentabile con più stoppini, per macchina di filatura o filatoio, e corrispondenti nuovo filatoio e nuova tipologia di filati prodotti da un filatoio equipaggiato con tale gruppo di stiro

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BE358392A (enrdf_load_stackoverflow)

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