Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
  • D01H1/14—Details
  • D01H1/20—Driving or stopping arrangements
  • D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control

Definitions

• the present invention relates to a spinning machine for obtaining reels of yarn from reels of roving.
• the present invention relates to a driving system of the drafting cylinders of the spinning machine.
• a spinning machine is able to process reels of roving to make reels of yarn, after drafting and twisting the roving.
• the spinning machine is composed of a portal, which the reels of roving are hung from, extending along a longitudinal axis.
• a drafting device generally formed of three pairs of cylinders having longitudinal extension, which the roving passes between to be drafted is positioned downstream of the reels of roving.
• the spindles which the drafted and twisted yarn is wound onto, are positioned downstream of the drafting device on a base in a row along the longitudinal axis, rotating around their own vertical axis.
• the spinning machine has two opposite banks, each provided with a row of spindles. To increase the productivity of the spinning line, it is opportune to provide spinning machines with . a large number of spindles. Currently, some spinning machines have as many as up to 2000 spindles, with a longitudinal length of 70- 80 metres .
• the cylinders of the drafting device acquire significant lengths, so as to be able to supply the yarn to the row of spindles.
• the purpose of the present invention is to make a spinning machine provided with a system for moving the cylinders particularly suited to spinning machines with a large number of spindles.
• FIG. 1 shows a diagram of a spinning machine fitted with a system for moving the drafting cylinders according to the present invention, according to one embodiment ;
• FIG. 1 shows a diagram of a spinning machine fitted with a system for moving the drafting cylinders according to the present invention, according to a further embodiment
• FIG. 3 shows a diagram of a transmission device of the movement from the motor to the first cylinder, according to the movement system in figures 1 or 2;
• FIG. 4 shows a diagram of a transmission device of the movement from the motor to the second and to the third cylinder, , according to the movement system in figures 1 or 2;
• FIG. 4 shows a diagram of a transmission device of the movement from the motor to the second and to the third cylinder, according to the movement system in figures 1 or 2/
• figure 5 is an axonometric view of the transmission device in figure 4.
• FIG. 6 shows an axonometric view of an intermediate transmission device of the movement from the motor to the second and to the third cylinder, according to the movement system in figures 1 or 2.
• a spinning machine extends mainly along a longitudinal axis X and comprises a support portal from which to hang reels of roving destined for processing.
• the spinning machine comprises a drafting device 1 of the roving, consisting of a set of coupled cylinders, positioned longitudinally and suitable for rotating around their own axis.
• the roving passing between the successive pairs of cylinders, undergoes drafting, caused by the different speeds of rotation of the cylinders of the two pairs.
• the lower or drafting cylinder is motorised, while the upper or pressure cylinder is idle and is dragged in rotation by the pressurised contact with the drafting cylinder underneath .
• each side of the spinning machine comprises :
• a first pair of cylinders comprising a first drafting cylinder 1 and the relative pressure cylinder, immediately upstream of the spindles; the first drafting cylinder being rotatable upon command around a first rotation axis Zl;
• a second pair of cylinders comprising a second drafting cylinder 2 and the relative second pressure cylinder, immediately upstream of the first pair; the second drafting cylinder being rotatable upon command around a second rotation axis Z2;
• a third pair of cylinders comprising a third drafting cylinder 3 and the relative third pressure cylinder, immediately upstream of the second pair; that is to say immediately downstream of the reels of roving; the third drafting cylinder being rotatable upon command around a third rotation axis Z3.
• the first drafting cylinder 1 is interrupted along the rotation axis Zl and therefore consists, for example, of a first section 1' and a second section 1' ' , aligned along the rotation axis Zl, but separate.
• the second drafting cylinder 2 and the third drafting cylinder 3 are also interrupted along their respective rotation axes Z2, Z3 and are therefore composed of respective sections, aligned along the rotation axes, but separate.
• the separation between the sections of the second and third drafting cylinders occurs at a separation line S, transversal to the longitudinal axis X.
• the spinning machine further comprises a movement system suitable for placing the drafting cylinders in rotation around their respective rotation axes upon command .
• the movement system comprises a motor of the first cylinders 10, that is an electric motor, to move the first drafting cylinders 1.
• the motor of the first cylinders 10 is kinematically connected to both the first drafting cylinders on the two sides of the spinning machine.
• the first motor of the first cylinders 10 is positioned at one longitudinal end of the first drafting cylinders, that is placed longitudinally alongside the drafting cylinders, that is beyond the axial extension of said drafting cylinders.
• the motor of the first cylinders 10 comprises a power take-off having a power take-off axis El, positioned transversally in an intermediate position between the rotation axes Zl of the first drafting cylinders, for example parallel to these.
• the movement system comprises a first support structure 15 which the motor of the first cylinders 1 rests on, preferably in such a manner as to slide transversally and to be blocked in a desired positio .
• the support structure 15 is such that the power take-off axis El is placed at a greater height than the rotation axes of the drafting and pressure cylinders .
• the movement system comprises at least one belt 16 for the transmission of the movement from the power take-off of the motor of the first cylinders 10 to the first drafting cylinders, and at least one tensioner 18 to tension the belt.
• the movement system envisages only one motor of the first cylinders 10 for the movement of the first cylinders 1 and said first cylinders extend continuously without interruption along their respective rotation axes, between the two longitudinal ends of the spinning machine.
• the movement system envisages a further motor of the first cylinders 10' positioned at the longitudinal end opposite that in which the prior motor of the first cylinders 10 is positioned.
• the prior motor of the first cylinders 10 is dedicated to the movement of the first sections 1' of the first cylinders land the further motor of the first cylinders 10' is dedicated to the movement of the second section 1' ' of the first cylinders 1.
• the further motor of the first cylinders 10' has its own support structure and can be adjusted transversally in position.
• the movement system further comprises a first motor of the second and third cylinders 20 to move the second and third drafting cylinders 2, 3.
• the motor of the second and third cylinders 20 is kinematically connected to both the second drawing cylinders 2 of the two sides of the spinning machine and to both the third drawing cylinders 3 of the two sides of the spinning machine.
• the first motor of the second and third cylinders 20 is positioned at one longitudinal end of the second and third drafting cylinders, that is placed longitudinally alongside the drafting cylinders, that is beyond the axial extension of said drafting cylinders.
• the first motor of the second and third cylinders 20 comprises a power take-off having a power take-off axis E2, positioned transversally in an intermediate position between the rotation axes Z2, Z3 of the second and third drafting cylinders, for example parallel to these.
• the movement system comprises a second support structure 25 which the motor of the second and third cylinders 20 rests on, preferably in such a manner as to slide transversally and to be blocked in a desired position.
• the support structure 25 is such that the power take-off axis E2 is placed at a greater height than that of the rotation axes of the drafting and pressure cylinders.
• the movement system comprises at least one belt 26 for the transmission of the movement from the power take-off of the motor of the second and third cylinders 20 to the second and third drafting cylinders, and at least one tensioner 28 to tension the belt.
• the movement system envisages a single motor of the second and third cylinders 20 positioned longitudinally alongside the drafting cylinder, positioned ⁇ that is beyond the longitudinal end of these.
• the movement system further comprises a further motor of the second and third cylinders 30 to move the second and third drafting cylinders, positioned in an intermediate position longitudinally in relation to the longitudinal ends of the drafting cylinders.
• the further motor of the second and third cylinders 30 is longitudinally flanked, on one side and the other, by said second and third cylinders.
• the further motor of the second and third cylinders 30 comprises a power take-off having a power take-off axis E3, positioned transversally in an intermediate position between the rotation axes Z2, Z3 of the second and third drafting cylinders, for example parallel to these.
• the movement system comprises a third support structure 35 which the further motor of the second and third cylinders 30 rests -on, preferably in such a manner as to slide transversally and to be blocked in a desired position.
• the support structure 35 is such that the power take-off axis E3 is placed at a greater height than the rotation axes of the drafting and pressure cylinders .
• the movement system comprises at least one belt 36 for the transmission of the movement from the power take-off of the further motor of the second and third cylinders 30 to the second and third drafting cylinders, and at least one tensioner 38 to tension the belt.
• the further motor of the second and third cylinders 30 is positioned beyond the centreline M of the spinning machine in relation to the first motor of the second and third cylinders 20.
• the further motor of the second and third cylinders is positioned 2/3 of the way along the drafting cylinders from the first motor of the second and third cylinders.
• the separation line S of the second and third drafting cylinders 2, 3 is in a median position between the motor of the second and third cylinders 20 and the further motor of the second and third cylinders 30 in an intermediate position.
• the number of spinning stations moved by the motor of the second and third cylinders 20 is equal to the number of spinning stations_ moved by the further motor of the second 'and third cylinders 30.
• the spinning machine comprises a total of 1800 spindles, that is 900 spindles per side.
• the first motor of the first drafting cylinders 10 moves 600 spinning station per side, on the first sections 1' of the first drafting cylinders; the further motor of the first drafting cylinders 10', placed at the longitudinal end opposite the first motor 10, moves 300 spinning stations per side, on the second section 1' ' of the first drafting cylinders.
• the first motor of the second and third cylinders 20 moves 300 spinning stations per side, on the first sections of the second and third drafting cylinders; the further motor of the second and third drafting cylinders 30, in an intermediate position, at 2/3 of the way along the cylinders, moves 300 spinning stations on one side and 300 spinning stations on the other side.
• the spinning machine according to the present invention makes an optimal subdivision of the number of spinning stations between the motors possible.
• the spinning machine is particularly suitable for spinning artificial textile fibres which need a high drafting force, especially on the second and third drafting cylinders, where the most marked drafting is performed
• the spinning machine according to the invention makes it possible to limit the twisting of the cylinders, reducing the number of motors and transmission devices compared to the prior solutions.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Or Twisting Of Yarns (AREA)
• Cash Registers Or Receiving Machines (AREA)
• Gear-Shifting Mechanisms (AREA)
• Control Of Stepping Motors (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (2)

Family

ID=43975957

Family Applications (1)

Country Status (7)

Cited By (3)

Families Citing this family (3)

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• 2011
  • 2011-02-24 IT ITBS2011A000019A patent/IT1404332B1/it active
  • 2011-11-10 CH CH01355/13A patent/CH706335B1/it unknown
  • 2011-11-10 CN CN201180068177.XA patent/CN103384734B/zh active Active
  • 2011-11-10 BR BR112013020646-2A patent/BR112013020646B1/pt active IP Right Grant
  • 2011-11-10 JP JP2013525415A patent/JP5524419B2/ja active Active
  • 2011-11-10 WO PCT/IB2011/055029 patent/WO2012004779A2/en active Application Filing
  • 2011-11-10 DE DE112011104949.8T patent/DE112011104949B4/de active Active

Non-Patent Citations (1)

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