WO2020095194A1 - Roving frame with segmented drafting cylinders - Google Patents

Roving frame with segmented drafting cylinders Download PDF

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Publication number
WO2020095194A1
WO2020095194A1 PCT/IB2019/059482 IB2019059482W WO2020095194A1 WO 2020095194 A1 WO2020095194 A1 WO 2020095194A1 IB 2019059482 W IB2019059482 W IB 2019059482W WO 2020095194 A1 WO2020095194 A1 WO 2020095194A1
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WO
WIPO (PCT)
Prior art keywords
lower cylinder
section
drafting
group
transmission group
Prior art date
Application number
PCT/IB2019/059482
Other languages
French (fr)
Inventor
Rosario Assenza
Pietro Sangaletti
Original Assignee
MARZOLI MACHINES TEXTILE S.r.l.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by MARZOLI MACHINES TEXTILE S.r.l. filed Critical MARZOLI MACHINES TEXTILE S.r.l.
Priority to JP2021524067A priority Critical patent/JP7481338B2/en
Priority to CN201980071457.2A priority patent/CN112955591B/en
Priority to EP19812847.2A priority patent/EP3877575B1/en
Priority to ES19812847T priority patent/ES2940746T3/en
Publication of WO2020095194A1 publication Critical patent/WO2020095194A1/en
Priority to JP2024017644A priority patent/JP2024042101A/en

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Classifications

    • 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
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings
    • D01H5/82—Arrangements for coupling roller sections
    • 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 refers to the sector of machines for spinning plants, wherein staple fibers are processed to obtain a yarn wound in bobbins.
  • the subject of the present invention is a roving frame for the processing of a fiber sliver, typically by a drafting frame, to obtain a roving wound in bobbins, intended for a spinning line.
  • the sliver travels from accumulation vessels to a drafting device and then to rotating fins, where it is wound to form bobbins .
  • the drafting device comprises drafting cylinders, generally three in number, having a continuous longitudinal extension along the machine, and the relative pressure cylinders, coupled by pressure on the respective drafting cylinders, thus forming a plurality of drafting points placed side by side longitudinally.
  • the drafting cylinders are motorized, whereas the pressure cylinders are driven in rotation by pressure coupling on the respective drafting cylinders.
  • the object of the present invention is to create a roving frame equipped with a drafting device with a high number of drafting points and a high structural reliability.
  • FIG. 1 shows schematically a roving frame according to an embodiment of the present invention
  • FIG. 2a and 2b illustrate a diagram of a drafting device of the roving frame in Figure 1, with mechanical adjustment of the draft, with three and four cylinders respectively;
  • FIG. 2c and 2d illustrate a diagram of a further drafting device for the roving frame of Figure 1, with mechanical adjustment of the draft, with three and four cylinders respectively;
  • FIG. 3a and 3b illustrate a diagram of a drafting device of the roving frame of Figure 1, with electronic adjustment of the draft, with three and four cylinders respectively .
  • FIG. 3c and 3d illustrate a diagram of a further drafting device of the roving frame of Figure 1, with electronic adjustment of the draft, with three and four cylinders respectively.
  • a roving frame of a spinning line is indicated collectively at 1.
  • upstream of the roving frame 1 is a drafting frame that produces a drawn fiber sliver fed to the roving frame; the roving frame processes the sliver and produces a roving wound into bobbins, which are then transported to a spinning frame downstream of the roving frame for further processing.
  • the roving frame 1 has a deposit area 2, located at the back of the machine; in the deposit area is deposited the sliver originating from the drafting frame, wound and stored in vessels 4.
  • a creel 6 is also located consisting of a frame equipped with rollers 8 with a predominant extension along a longitudinal direction X, generally having a hexagonal cross-section and typically motorized, arranged above the vessels 4.
  • the frame 1 comprises a machine body 2 comprising a drafting device 10 consisting of pairs of superimposed cylinders pressure-engaged with peripheral speeds of rotation that increase from upstream to downstream, so as to progressively draw the sliver that passes between the coupled cylinders.
  • a drafting device 10 consisting of pairs of superimposed cylinders pressure-engaged with peripheral speeds of rotation that increase from upstream to downstream, so as to progressively draw the sliver that passes between the coupled cylinders.
  • the drafting device 10 comprises motorized lower cylinders, for example three or four, each of which extends in the longitudinal direction X along the frame.
  • Each lower cylinder cooperates with a plurality of separated idle upper cylinders, supported, usually in pairs, by pressure arms.
  • the pressure arms are pneumatically pushed to ensure the pressure coupling between the lower cylinder and the upper cylinders.
  • the machine body 2 Downstream of the drafting device 10, the machine body 2 comprises a rail 20 with extension along the longitudinal direction, for the whole length of the frame, defining an upper region of the rail above and a lower region below.
  • the rail 20 houses a plurality of necks 22, organized into two longitudinal rows, arranged longitudinally offset, protruding from a rail floor 21 of said rail 20.
  • the machine body 2 further comprises a plurality of fins 30, arranged in the lower region at each neck 22, supported by the rail 20.
  • the fins 30 are suitable to be rotated around a respective vertical axis by means of a fin electric motor.
  • the machine body 2 further comprises a trolley 40, arranged in the lower region, carrying a plurality of spindles 42, each placed coaxially to the respective fin 30.
  • the trolley 40 is vertically movable with alternating motion for the formation of the bobbin, by means of a first trolley electric motor.
  • the trolley 40 is translatable horizontally and/or rotatable for the operations of lifting the bobbins and loading the empty tubes, by means of a second trolley electric motor.
  • the spindles 42 aligned along the longitudinal direction X, are also movable in rotation coaxially to the fins 30, by means of a spindle electric motor.
  • the fins 30 are also equipped with suitable formation means to keep the roving attached to the tube placed on the respective spindle 42 or attached to the bobbin during formation.
  • the roving frame comprises an electronic unit to control the operation of the entire frame, operatively connected to the components of the frame to receive control signals and send command signals.
  • the drafting device 10 comprises, following the feed direction A of the sliver from upstream to downstream, a third lower cylinder 103, a second lower cylinder 102 and a first lower cylinder 101, which extend longitudinally for the entire length of the machine.
  • the third lower cylinder 103 comprises a first section 103' and a second section 103' ' , separated from each other and coaxial, typically of different lengths.
  • the second lower cylinder 102 comprises a first section 102' and a second section 102 ,f , separated from each other and coaxial.
  • the third drafting cylinder and second drafting cylinder are segmented.
  • the first section 102' has a length equal to that of the first section 103' of the third lower cylinder 103 and the second section 102 has a length equal to that of the second section 103' of the third lower cylinder 103.
  • the first lower cylinder 101 is continuous between the ends of the machine.
  • the drafting device 10 further comprises a first drive group 50' for moving the lower cylinders, arranged at one end of the machine, and a second drive group 50' ' , arranged at the other end of the machine.
  • the electronic unit is operatively connected to the first drive group 50' and/or to the second drive group 50' ' in order to receive operation control signals of the first drive group 50' and/or the second drive group 50 and to send signals to command the first drive group 50' and/or the second drive group 50 .
  • the first drive group 50' comprises a first electric motor 52' with relative speed reducer and a main transmission group 54', for example formed by gears.
  • the main transmission group 54' is directly connected to the first motor 52' and to the first lower cylinder 101, preferably at the first end thereof.
  • the first drive group 50' further comprises a first transmission group 56' or drafting group, for example formed by gears, directly connected to the first lower cylinder 101 and to the first section 103' of the third lower cylinder 103, preferably at the first end thereof.
  • a first transmission group 56' or drafting group for example formed by gears
  • the first drive group 50' comprises a second transmission group 58' or pre-drafting group, preferably comprising gears, directly connected to the first section 103' of the third lower cylinder 103 and to the first section 102' of the second lower cylinder 102, preferably at the first end thereof.
  • the second drive group 50 further comprises a first transmission group 56'’ , for example formed by gears, directly connected to the first lower cylinder 101 and to the second section 103' of the third lower cylinder 103, preferably at the second end thereof.
  • a first transmission group 56'’ for example formed by gears, directly connected to the first lower cylinder 101 and to the second section 103' of the third lower cylinder 103, preferably at the second end thereof.
  • the second drive group 50' ' comprises a second transmission group 58' ' preferably comprising gears, directly connected to the second section 103' ' of the third lower cylinder 103 and to the second section 102' ' of the second lower cylinder 102, preferably at the second end thereof.
  • the drafting device 10 further comprises, with respect to the embodiment described above, a fourth lower cylinder 104, arranged between the first lower cylinder 101 and the second lower cylinder 102.
  • the fourth lower cylinder 104 is continuous between the ends of the machine.
  • the first drive group 50' comprises a third transmission group 60' , preferably comprising gears, directly connected to the first lower cylinder 101 and to the fourth lower cylinder 104, preferably at the first end thereof.
  • the drafting device 10 is substantially the same as that described above for the first embodiment ( Figure 2a), but the first lower cylinder 101 is segmented .
  • the first lower cylinder 101 comprises a first section 101' and a second section 101'', separated from each other and coaxial, typically of different lengths.
  • the first section 101' has a length equal to that of the first section 102' of the second lower cylinder 102 and the second section 101' has a length equal to that of the second section 102' of the second lower cylinder 102.
  • the main transmission group 54' is directly connected to the first motor 52' and the first section 101' of the first lower cylinder 101, preferably at the first end thereof.
  • the first drive group 50' further comprises a first transmission group 56' or drafting group, for example formed by gears, directly connected to the first section 101' of the first lower cylinder 101 and to the first section 103' of the third lower cylinder 103, preferably at the first end thereof.
  • a first transmission group 56' or drafting group for example formed by gears
  • the first drive group 50' comprises a second transmission group 58' or pre-drafting group, preferably comprising gears, directly connected to the first section 103' of the third lower cylinder 103 and to the first section 102' of the second lower cylinder 102, preferably at the first end thereof.
  • the second drive group 50' comprises a second electric motor 52' with relative speed reducer and a main transmission group 54 ,f , for example formed by gears .
  • the main transmission group 54' is directly connected to the second motor 52' and to the second section 101 of the first lower cylinder 101, preferably to the second end thereof.
  • the second drive group 50 further comprises a first transmission group 56 or drafting group, for example formed by gears, directly connected to the second section 101 of the first lower cylinder 101 and to the second section 103 of the third lower cylinder 103, preferably at the first end thereof.
  • a first transmission group 56 or drafting group for example formed by gears, directly connected to the second section 101 of the first lower cylinder 101 and to the second section 103 of the third lower cylinder 103, preferably at the first end thereof.
  • the second drive group 50 comprises a second transmission group 58' or pre-drafting group, preferably comprising gears, directly connected to the second section 103' of the third lower cylinder 103 and to the second section 102 of the second lower cylinder 102, preferably to the second end thereof.
  • the drafting device 10 is substantially the same as that described above for the second embodiment ( Figure 2b), but the first lower cylinder 101 is segmented and the fourth lower cylinder 104 is segmented.
  • the first lower cylinder 101 comprises a first section 101' and a second section
  • the first section 101' has a length equal to that of the first section 102' of the second lower cylinder 102 and the second section 101' ' has a length equal to that of the second section 102' ' of the second lower cylinder 102.
  • the fourth lower cylinder 104 comprises a first section 104' and a second section 104 ,f , separated from each other and coaxial, typically of different lengths .
  • the first section 104' has a length equal to that of the first section 102' of the second lower cylinder 102
  • the second section 104' ' has a length equal to that of the second section 102' ' of the second lower cylinder 102.
  • the first drive group 50' comprises a first electric motor 52' with relative speed reducer and a main transmission group 54', for example formed by gears .
  • the main transmission group 54' is directly connected to the first motor 52' and the first section 101' of the first lower cylinder 101, preferably at the first end thereof.
  • the first drive group 50' further comprises a first transmission group 56' or drafting group, for example formed by gears, directly connected to the first section 101' of the first lower cylinder 101 and to the first section 103' of the third lower cylinder 103, preferably at the first end thereof.
  • the first drive group 50' comprises a second transmission group 58' or pre-drawing group, preferably comprising gears, directly connected to the first section 103' of the third lower cylinder 103 and to the first section 102' of the second lower cylinder 102, preferably at the first end thereof.
  • the first drive group 50' comprises a third transmission group 60' , preferably comprising gears, directly connected to the first section 101' of the first lower cylinder 101 and to the first section 104' of the fourth lower cylinder 104, preferably at the first end thereof .
  • the second drive group 50' ' comprises a second electric motor 52'' with relative speed reducer and a main transmission group 54 ,f , for example formed by gears .
  • the main transmission group 54' ' is directly connected to the second motor 52'' and to the second section 101' ' of the first lower cylinder 101, preferably to the second end thereof.
  • the second drive group 50' ' further comprises a first transmission group 56' ' or drafting group, for example formed by gears, directly connected to the second section 101' ' of the first lower cylinder 101 and to the second section 103' ' of the third lower cylinder 103, preferably at the first end thereof.
  • a first transmission group 56' ' or drafting group for example formed by gears, directly connected to the second section 101' ' of the first lower cylinder 101 and to the second section 103' ' of the third lower cylinder 103, preferably at the first end thereof.
  • the second drive group 50' ' comprises a second transmission group 58' ' or pre-drafting group, preferably comprising gears, directly connected to the second section 103' ' of the third lower cylinder 103 and to the second section 102' ' of the second lower cylinder 102, preferably at the second end thereof.
  • the second drive group 50' ' comprises a third transmission group 60' ' , preferably comprising gears, directly connected to the second section 101' ' of the first lower cylinder 101 and the second section 104' ' of the fourth lower cylinder 104, preferably at the second end thereof.
  • the embodiments described above are particularly suitable for a mechanical adjustment of the draft; in other words, to vary the rotation speeds of the lower cylinders in order to obtain the desired drafting ratios of the sliver being processed, the gears of the drive groups are replaced in order to achieve the desired transmission ratios.
  • the drafting device 10 is structurally and functionally similar to the first embodiment described above ( Figure 2a), except for the following.
  • the first drive group 50' comprises the first electric motor 52' that moves only the first lower cylinder 101, being mechanically disengaged from the third lower cylinder 103 and the second lower cylinder 102.
  • the first drive group 50' comprises an additional electric motor 53' that directly moves the first section 103' of the third lower cylinder 103, by means of a first transmission group 56' , whereas the first section 103' of the third lower cylinder 103 moves the first section 102' of the second lower cylinder 102 by means of the second transmission group 58' .
  • the second drive group 50' ' comprises an additional electric motor 53' ' that directly moves the second section 103' ' of the third lower cylinder 103 by means of the first transmission group 56' ' , whereas the second section 103' ' of the third lower cylinder 103 moves the second section 102' ' of the second lower cylinder 102 by means of the second transmission group 58' '
  • the drafting device 10 is structurally and functionally similar to the second embodiment described above ( Figure 2b), except for the following.
  • the first drive group 50' comprises the first electric motor 52' that moves only the first lower cylinder 101 and the fourth lower cylinder 104, being mechanically disengaged from the third lower cylinder 103 and from the second lower cylinder 102.
  • the first motor 52' directly moves the first lower cylinder 101 by means of the main transmission group 54', whereas the first lower cylinder 101 moves the fourth lower cylinder 104 by means of the third transmission group 60' , preferably arranged at the first end thereof.
  • the first drive group 50' comprises the additional electric motor 53' that directly moves the first section 103' of the third lower cylinder 103 by means of a first transmission group 56' , whereas the first section 103' of the third lower cylinder 103 moves the first section 102' of the second lower cylinder 102 by means of the second transmission group 58' .
  • the second drive group 50 comprises the additional electric motor 53' that directly moves the second section 103 of the third lower cylinder 103 by means of the first transmission group 56' ' , whereas the second section 103 of the third lower cylinder 103 moves the second section 102 of the second lower cylinder 102 by means of the second transmission group
  • the drafting device 10 is structurally and functionally similar to the third embodiment described above ( Figure 2c), except for the following.
  • the first drive group 50' comprises the first electric motor 52' that moves only the first section 101' of the first lower cylinder 101 by means of the main transmission group 54' .
  • the first motor 52' is mechanically disengaged from the third lower cylinder 103 and from the second lower cylinder 102.
  • the first drive group 50' comprises an additional electric motor 53' that directly moves the first section 103' of the third lower cylinder 103 by means of a first transmission group 56' , whereas the first section 103' of the third lower cylinder 103 moves the first section 102' of the second lower cylinder 102 by means of the second transmission group 58' .
  • the second drive group 50" comprises an additional electric motor 53' that directly moves the second section 103' ' of the third lower cylinder 103 by means of the first transmission group 56'’ , whereas the second section 103' ' of the third lower cylinder 103 moves the second section 102' ' of the second lower cylinder 102 by means of the second transmission group 58 ,f .
  • the second drive group 50’’ comprises an additional electric motor 52'’ that moves only the second section 101'’ of the first lower cylinder 101, by means of a main transmission group 54 ,f .
  • the first drive group 50' comprises the first electric motor 52' that directly moves the first section 101' of the first lower cylinder 101 by means of the main transmission group 54', whereas the first section 101' of the first lower cylinder 101 moves the first section 104' of the fourth lower cylinder 104 by means of the third transmission group 60' , preferably arranged at the first end thereof.
  • the first motor 52' is mechanically disengaged from the third lower cylinder 103 and from the second lower cylinder 102.
  • the first drive group 50' comprises an additional electric motor 53' that directly moves the first section 103' of the third lower cylinder 103 by means of a first transmission group 56' , whereas the first section 103' of the third lower cylinder 103 moves the first section 102' of the second lower cylinder 102 by means of the second transmission group 58' .
  • the second drive group 50' ' comprises an additional electric motor 53' ' that directly moves the second section 103' ' of the third lower cylinder 103 by means of the first transmission group 56' ' , whereas the second section 103' ' of the third lower cylinder 103 moves the second section 102' ' of the second lower cylinder 102 by means of the second transmission group 58 , f .
  • the second drive group 50' ' comprises an additional electric motor 52'' that directly moves the second section 101' ' of the first lower cylinder 101, by means of a first transmission group 54 , f , whereas the second section 101' of the first lower cylinder 101 moves the second section 104' ' of the fourth lower cylinder 104 by means of the third transmission group 60' ' .
  • the embodiments described above are particularly suitable for an electronic adjustment of the draft; in other words, to vary the rotation speeds of the lower cylinders, in order to obtain the desired drafting ratios of the sliver being processed, the motors of the drive groups are controlled electronically.
  • the roving frame according to the present invention allows the needs of the sector to be satisfied, as it allows the number of drafting points to be increased, at the same time overcoming the drawbacks mentioned above, as no breakages of the drafting cylinders have been detected.
  • the second and third drafting cylinders are segmented, i.e., divided into two sections, thus overcoming this drawback.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Treatment Of Fiber Materials (AREA)

Abstract

A roving frame (1) of a spinning line comprises a drafting device (10) with a third lower cylinder (103), a second lower cylinder (102) and a first lower cylinder (101). The third lower cylinder (103) and the second lower cylinder (102) are segmented, whereas the first lower cylinder (101) is continuous between the ends of the frame or segmented.

Description

DESCRIPTION
"ROVING FRAME WITH SEGMENTED DRAFTING CYLINDERS"
[0001] The present invention refers to the sector of machines for spinning plants, wherein staple fibers are processed to obtain a yarn wound in bobbins. In particular, the subject of the present invention is a roving frame for the processing of a fiber sliver, typically by a drafting frame, to obtain a roving wound in bobbins, intended for a spinning line.
[0002] During the operations on the frame, the sliver travels from accumulation vessels to a drafting device and then to rotating fins, where it is wound to form bobbins .
[0003] The drafting device comprises drafting cylinders, generally three in number, having a continuous longitudinal extension along the machine, and the relative pressure cylinders, coupled by pressure on the respective drafting cylinders, thus forming a plurality of drafting points placed side by side longitudinally.
[0004] The drafting cylinders are motorized, whereas the pressure cylinders are driven in rotation by pressure coupling on the respective drafting cylinders.
[0005] In order to improve the profitability of spinning plants, which involve high initial investment costs for the construction and start-up of the plants, manufacturers are constantly engaged in improving the performance of each individual machine.
[0006] In the case of roving frames, in addition to increasing the automation of the functions, the trend is to develop solutions that have a high number of drafting points in order to increase the hourly productivity of the machine .
[0007] However, it has been experimentally found that by increasing the drafting points, there is an increase in breakages of the drafting cylinders and of the devices used to move them.
[0008] The object of the present invention is to create a roving frame equipped with a drafting device with a high number of drafting points and a high structural reliability.
[0009] Such object is achieved by a roving frame according to claim 1. The dependent claims describe further advantageous embodiments of the invention.
[0010] The features and advantages of the roving frame according to the present invention will be apparent from the description given below, provided by way of non limiting example, in accordance with the accompanying figures, wherein:
- Figure 1 shows schematically a roving frame according to an embodiment of the present invention; - Figures 2a and 2b illustrate a diagram of a drafting device of the roving frame in Figure 1, with mechanical adjustment of the draft, with three and four cylinders respectively;
- Figures 2c and 2d illustrate a diagram of a further drafting device for the roving frame of Figure 1, with mechanical adjustment of the draft, with three and four cylinders respectively;
- Figures 3a and 3b illustrate a diagram of a drafting device of the roving frame of Figure 1, with electronic adjustment of the draft, with three and four cylinders respectively .
- Figures 3c and 3d illustrate a diagram of a further drafting device of the roving frame of Figure 1, with electronic adjustment of the draft, with three and four cylinders respectively.
[0011] With reference to the accompanying figures, a roving frame of a spinning line is indicated collectively at 1.
[0012] Typically, upstream of the roving frame 1 is a drafting frame that produces a drawn fiber sliver fed to the roving frame; the roving frame processes the sliver and produces a roving wound into bobbins, which are then transported to a spinning frame downstream of the roving frame for further processing.
[0013] The roving frame 1 has a deposit area 2, located at the back of the machine; in the deposit area is deposited the sliver originating from the drafting frame, wound and stored in vessels 4.
[0014] In this deposit area 2 a creel 6 is also located consisting of a frame equipped with rollers 8 with a predominant extension along a longitudinal direction X, generally having a hexagonal cross-section and typically motorized, arranged above the vessels 4.
[0015] The sliver coming out of the vessels 4 is placed above the rollers 8 and fed to the frame 1.
[0016] The frame 1 comprises a machine body 2 comprising a drafting device 10 consisting of pairs of superimposed cylinders pressure-engaged with peripheral speeds of rotation that increase from upstream to downstream, so as to progressively draw the sliver that passes between the coupled cylinders.
[0017] In particular, the drafting device 10 comprises motorized lower cylinders, for example three or four, each of which extends in the longitudinal direction X along the frame. Each lower cylinder cooperates with a plurality of separated idle upper cylinders, supported, usually in pairs, by pressure arms.
[0018] Preferably, the pressure arms are pneumatically pushed to ensure the pressure coupling between the lower cylinder and the upper cylinders. [0019] Downstream of the drafting device 10, the machine body 2 comprises a rail 20 with extension along the longitudinal direction, for the whole length of the frame, defining an upper region of the rail above and a lower region below.
[0020] The rail 20 houses a plurality of necks 22, organized into two longitudinal rows, arranged longitudinally offset, protruding from a rail floor 21 of said rail 20.
[0021] The machine body 2 further comprises a plurality of fins 30, arranged in the lower region at each neck 22, supported by the rail 20. The fins 30 are suitable to be rotated around a respective vertical axis by means of a fin electric motor.
[0022] The machine body 2 further comprises a trolley 40, arranged in the lower region, carrying a plurality of spindles 42, each placed coaxially to the respective fin 30. The trolley 40 is vertically movable with alternating motion for the formation of the bobbin, by means of a first trolley electric motor.
[0023] In addition, the trolley 40 is translatable horizontally and/or rotatable for the operations of lifting the bobbins and loading the empty tubes, by means of a second trolley electric motor.
[0024] The spindles 42, aligned along the longitudinal direction X, are also movable in rotation coaxially to the fins 30, by means of a spindle electric motor.
[0025] The fins 30 are also equipped with suitable formation means to keep the roving attached to the tube placed on the respective spindle 42 or attached to the bobbin during formation.
[0026] The sliver from the creel 6 passes through the drafting device 10 and then enters the respective neck 22, through which it passes into the lower region of the frame.
[0027] Here, through the neck 22, it enters the respective fin 30 and exits from the lower end; the trolley 40 is moved with alternating vertical motion, so that the roving is wound on the tube placed on the spindle and forms a bobbin.
[0028] Once the bobbins have been formed, they are picked up and transported, automatically or manually, to the spinning frame for further processing.
[0029] Lastly, the roving frame comprises an electronic unit to control the operation of the entire frame, operatively connected to the components of the frame to receive control signals and send command signals.
Embodiments with mechanical setting of the draft
[0030] According to a first embodiment of the invention
(Figure 2a), the drafting device 10 comprises, following the feed direction A of the sliver from upstream to downstream, a third lower cylinder 103, a second lower cylinder 102 and a first lower cylinder 101, which extend longitudinally for the entire length of the machine.
[0031] The third lower cylinder 103 comprises a first section 103' and a second section 103' ' , separated from each other and coaxial, typically of different lengths.
[0032] Similarly, the second lower cylinder 102 comprises a first section 102' and a second section 102,f, separated from each other and coaxial.
[0033] In other words, the third drafting cylinder and second drafting cylinder are segmented.
[0034] Preferably, the first section 102' has a length equal to that of the first section 103' of the third lower cylinder 103 and the second section 102 has a length equal to that of the second section 103' of the third lower cylinder 103.
[0035] The first lower cylinder 101 is continuous between the ends of the machine.
[0036] The drafting device 10 further comprises a first drive group 50' for moving the lower cylinders, arranged at one end of the machine, and a second drive group 50' ' , arranged at the other end of the machine.
[0037] The electronic unit is operatively connected to the first drive group 50' and/or to the second drive group 50' ' in order to receive operation control signals of the first drive group 50' and/or the second drive group 50 and to send signals to command the first drive group 50' and/or the second drive group 50 .
[0038] The first drive group 50' comprises a first electric motor 52' with relative speed reducer and a main transmission group 54', for example formed by gears.
[0039] The main transmission group 54' is directly connected to the first motor 52' and to the first lower cylinder 101, preferably at the first end thereof.
[0040] The first drive group 50' further comprises a first transmission group 56' or drafting group, for example formed by gears, directly connected to the first lower cylinder 101 and to the first section 103' of the third lower cylinder 103, preferably at the first end thereof.
[0041] Lastly, the first drive group 50' comprises a second transmission group 58' or pre-drafting group, preferably comprising gears, directly connected to the first section 103' of the third lower cylinder 103 and to the first section 102' of the second lower cylinder 102, preferably at the first end thereof.
[0042] The second drive group 50 further comprises a first transmission group 56'’ , for example formed by gears, directly connected to the first lower cylinder 101 and to the second section 103' of the third lower cylinder 103, preferably at the second end thereof.
[0043] Moreover, the second drive group 50' ' comprises a second transmission group 58' ' preferably comprising gears, directly connected to the second section 103' ' of the third lower cylinder 103 and to the second section 102' ' of the second lower cylinder 102, preferably at the second end thereof.
[0044] According to a second embodiment of the invention (Figure 2b), the drafting device 10 further comprises, with respect to the embodiment described above, a fourth lower cylinder 104, arranged between the first lower cylinder 101 and the second lower cylinder 102.
[0045] The fourth lower cylinder 104 is continuous between the ends of the machine.
[0046] Moreover, the first drive group 50' comprises a third transmission group 60' , preferably comprising gears, directly connected to the first lower cylinder 101 and to the fourth lower cylinder 104, preferably at the first end thereof.
[0047] According to a third embodiment of the invention (Figure 2c), the drafting device 10 is substantially the same as that described above for the first embodiment (Figure 2a), but the first lower cylinder 101 is segmented .
[0048] In particular, the first lower cylinder 101 comprises a first section 101' and a second section 101'', separated from each other and coaxial, typically of different lengths.
[0049] Preferably, the first section 101' has a length equal to that of the first section 102' of the second lower cylinder 102 and the second section 101' has a length equal to that of the second section 102' of the second lower cylinder 102.
[0050] In this embodiment, the main transmission group 54' is directly connected to the first motor 52' and the first section 101' of the first lower cylinder 101, preferably at the first end thereof.
[0051] The first drive group 50' further comprises a first transmission group 56' or drafting group, for example formed by gears, directly connected to the first section 101' of the first lower cylinder 101 and to the first section 103' of the third lower cylinder 103, preferably at the first end thereof.
[0052] Lastly, the first drive group 50' comprises a second transmission group 58' or pre-drafting group, preferably comprising gears, directly connected to the first section 103' of the third lower cylinder 103 and to the first section 102' of the second lower cylinder 102, preferably at the first end thereof.
[0053] The second drive group 50' comprises a second electric motor 52' with relative speed reducer and a main transmission group 54,f, for example formed by gears .
[0054] The main transmission group 54' is directly connected to the second motor 52' and to the second section 101 of the first lower cylinder 101, preferably to the second end thereof.
[0055] The second drive group 50 further comprises a first transmission group 56 or drafting group, for example formed by gears, directly connected to the second section 101 of the first lower cylinder 101 and to the second section 103 of the third lower cylinder 103, preferably at the first end thereof.
[0056] Lastly, the second drive group 50 comprises a second transmission group 58' or pre-drafting group, preferably comprising gears, directly connected to the second section 103' of the third lower cylinder 103 and to the second section 102 of the second lower cylinder 102, preferably to the second end thereof.
[0057] According to a fourth embodiment of the invention (Figure 2d), the drafting device 10 is substantially the same as that described above for the second embodiment (Figure 2b), but the first lower cylinder 101 is segmented and the fourth lower cylinder 104 is segmented.
[0058] In particular, the first lower cylinder 101 comprises a first section 101' and a second section
101'', separated from each other and coaxial, typically of different lengths.
[0059] Preferably, the first section 101' has a length equal to that of the first section 102' of the second lower cylinder 102 and the second section 101' ' has a length equal to that of the second section 102' ' of the second lower cylinder 102.
[0060] Moreover, the fourth lower cylinder 104 comprises a first section 104' and a second section 104,f, separated from each other and coaxial, typically of different lengths .
[0061] Preferably, the first section 104' has a length equal to that of the first section 102' of the second lower cylinder 102, and the second section 104' ' has a length equal to that of the second section 102' ' of the second lower cylinder 102.
[0062] In this embodiment, the first drive group 50' comprises a first electric motor 52' with relative speed reducer and a main transmission group 54', for example formed by gears .
[0063] The main transmission group 54' is directly connected to the first motor 52' and the first section 101' of the first lower cylinder 101, preferably at the first end thereof. [0064] The first drive group 50' further comprises a first transmission group 56' or drafting group, for example formed by gears, directly connected to the first section 101' of the first lower cylinder 101 and to the first section 103' of the third lower cylinder 103, preferably at the first end thereof.
[0065] Furthermore, the first drive group 50' comprises a second transmission group 58' or pre-drawing group, preferably comprising gears, directly connected to the first section 103' of the third lower cylinder 103 and to the first section 102' of the second lower cylinder 102, preferably at the first end thereof.
[0066] Lastly, the first drive group 50' comprises a third transmission group 60' , preferably comprising gears, directly connected to the first section 101' of the first lower cylinder 101 and to the first section 104' of the fourth lower cylinder 104, preferably at the first end thereof .
[0067] The second drive group 50' ' comprises a second electric motor 52'' with relative speed reducer and a main transmission group 54,f, for example formed by gears .
[0068] The main transmission group 54' ' is directly connected to the second motor 52'' and to the second section 101' ' of the first lower cylinder 101, preferably to the second end thereof.
[0069] The second drive group 50' ' further comprises a first transmission group 56' ' or drafting group, for example formed by gears, directly connected to the second section 101' ' of the first lower cylinder 101 and to the second section 103' ' of the third lower cylinder 103, preferably at the first end thereof.
[0070] Moreover, the second drive group 50' ' comprises a second transmission group 58' ' or pre-drafting group, preferably comprising gears, directly connected to the second section 103' ' of the third lower cylinder 103 and to the second section 102' ' of the second lower cylinder 102, preferably at the second end thereof.
[0071] Lastly, the second drive group 50' ' comprises a third transmission group 60' ' , preferably comprising gears, directly connected to the second section 101' ' of the first lower cylinder 101 and the second section 104' ' of the fourth lower cylinder 104, preferably at the second end thereof.
[0072] The embodiments described above are particularly suitable for a mechanical adjustment of the draft; in other words, to vary the rotation speeds of the lower cylinders in order to obtain the desired drafting ratios of the sliver being processed, the gears of the drive groups are replaced in order to achieve the desired transmission ratios.
Embodiments with electronic setting of the draft
[0073] According to a first embodiment of the invention (Figure 3a), the drafting device 10 is structurally and functionally similar to the first embodiment described above (Figure 2a), except for the following.
[0074] The first drive group 50' comprises the first electric motor 52' that moves only the first lower cylinder 101, being mechanically disengaged from the third lower cylinder 103 and the second lower cylinder 102.
[0075] Furthermore, the first drive group 50' comprises an additional electric motor 53' that directly moves the first section 103' of the third lower cylinder 103, by means of a first transmission group 56' , whereas the first section 103' of the third lower cylinder 103 moves the first section 102' of the second lower cylinder 102 by means of the second transmission group 58' .
[0076] Moreover, the second drive group 50' ' comprises an additional electric motor 53' ' that directly moves the second section 103' ' of the third lower cylinder 103 by means of the first transmission group 56' ' , whereas the second section 103' ' of the third lower cylinder 103 moves the second section 102' ' of the second lower cylinder 102 by means of the second transmission group 58' '
[0077] According to a second embodiment of the invention (Figure 3b), the drafting device 10 is structurally and functionally similar to the second embodiment described above (Figure 2b), except for the following.
[0078] The first drive group 50' comprises the first electric motor 52' that moves only the first lower cylinder 101 and the fourth lower cylinder 104, being mechanically disengaged from the third lower cylinder 103 and from the second lower cylinder 102.
[0079] In particular, the first motor 52' directly moves the first lower cylinder 101 by means of the main transmission group 54', whereas the first lower cylinder 101 moves the fourth lower cylinder 104 by means of the third transmission group 60' , preferably arranged at the first end thereof.
[0080] Furthermore, the first drive group 50' comprises the additional electric motor 53' that directly moves the first section 103' of the third lower cylinder 103 by means of a first transmission group 56' , whereas the first section 103' of the third lower cylinder 103 moves the first section 102' of the second lower cylinder 102 by means of the second transmission group 58' .
[0081] Moreover, the second drive group 50 comprises the additional electric motor 53' that directly moves the second section 103 of the third lower cylinder 103 by means of the first transmission group 56' ' , whereas the second section 103 of the third lower cylinder 103 moves the second section 102 of the second lower cylinder 102 by means of the second transmission group
58" .
[0082] According to a third embodiment of the invention (Figure 3c), the drafting device 10 is structurally and functionally similar to the third embodiment described above (Figure 2c), except for the following.
[0083] The first drive group 50' comprises the first electric motor 52' that moves only the first section 101' of the first lower cylinder 101 by means of the main transmission group 54' . The first motor 52' is mechanically disengaged from the third lower cylinder 103 and from the second lower cylinder 102.
[0084] Furthermore, the first drive group 50' comprises an additional electric motor 53' that directly moves the first section 103' of the third lower cylinder 103 by means of a first transmission group 56' , whereas the first section 103' of the third lower cylinder 103 moves the first section 102' of the second lower cylinder 102 by means of the second transmission group 58' .
[0085] The second drive group 50" comprises an additional electric motor 53' that directly moves the second section 103' ' of the third lower cylinder 103 by means of the first transmission group 56'’ , whereas the second section 103' ' of the third lower cylinder 103 moves the second section 102' ' of the second lower cylinder 102 by means of the second transmission group 58,f.
[0086] Moreover, the second drive group 50’’ comprises an additional electric motor 52'’ that moves only the second section 101'’ of the first lower cylinder 101, by means of a main transmission group 54,f.
[0087] According to a fourth embodiment of the invention
(Figure 3d), the drafting device 10 is structurally and functionally similar to the fourth embodiment described above (Figure 2d), except for the following.
[0088] The first drive group 50' comprises the first electric motor 52' that directly moves the first section 101' of the first lower cylinder 101 by means of the main transmission group 54', whereas the first section 101' of the first lower cylinder 101 moves the first section 104' of the fourth lower cylinder 104 by means of the third transmission group 60' , preferably arranged at the first end thereof.
[0089] The first motor 52' is mechanically disengaged from the third lower cylinder 103 and from the second lower cylinder 102.
[0090] Furthermore, the first drive group 50' comprises an additional electric motor 53' that directly moves the first section 103' of the third lower cylinder 103 by means of a first transmission group 56' , whereas the first section 103' of the third lower cylinder 103 moves the first section 102' of the second lower cylinder 102 by means of the second transmission group 58' .
[0091] The second drive group 50' ' comprises an additional electric motor 53' ' that directly moves the second section 103' ' of the third lower cylinder 103 by means of the first transmission group 56' ' , whereas the second section 103' ' of the third lower cylinder 103 moves the second section 102' ' of the second lower cylinder 102 by means of the second transmission group 58, f .
[0092] Furthermore, the second drive group 50' ' comprises an additional electric motor 52'' that directly moves the second section 101' ' of the first lower cylinder 101, by means of a first transmission group 54, f, whereas the second section 101' of the first lower cylinder 101 moves the second section 104' ' of the fourth lower cylinder 104 by means of the third transmission group 60' ' .
[0093] The embodiments described above are particularly suitable for an electronic adjustment of the draft; in other words, to vary the rotation speeds of the lower cylinders, in order to obtain the desired drafting ratios of the sliver being processed, the motors of the drive groups are controlled electronically.
Figure imgf000021_0001
[0094] Innovatively, the roving frame according to the present invention allows the needs of the sector to be satisfied, as it allows the number of drafting points to be increased, at the same time overcoming the drawbacks mentioned above, as no breakages of the drafting cylinders have been detected.
[0095] Advantageously, moreover, in the solution according to the invention, no breakages of the members used to move the drafting cylinders have been detected.
[0096] In particular, for the solutions of the known art, it has been found that, by increasing the number of drafting points, there are breakages of the gears used for the transmission between the drafting cylinders, especially with reference to the second and third drafting cylinders, which envisage the highest torque action .
[0097] Due to the proximity of the second and third drafting cylinders, these gears are small in size and are constrained by their overall dimensions.
[0098] In the solution according to the invention, however, the second and third drafting cylinders are segmented, i.e., divided into two sections, thus overcoming this drawback. [0099] According to another advantageous aspect, in the solution according to the invention there is no longer a delay in the start-up of the drafting cylinders, which in the solutions of the known art is due to the torsion that these cylinders encounter.
[00100] It is clear that one skilled in the art, in order to satisfy contingent needs, may make changes to the roving frame described above, all contained within the scope of protection defined by the following claims.

Claims

Claims
1. A roving frame (1) of a spinning line for processing a fiber sliver and obtaining a roving wound in bobbins, comprising a drafting device (10) with several drafting points placed side by side longitudinally, wherein said drafting device (10) comprises, in the feed direction (A) of the sliver being processed, a third lower cylinder (103), a second lower cylinder (102) and a first lower cylinder (101) extending longitudinally between a first end and a second end of the frame, wherein the third lower cylinder (103) consists of a first section (103') and a second section (103"), coaxial and separated, and the second lower cylinder (102) consists of a first section (102') and a second section (102"), coaxial and separated, and wherein the first section (103') and the second section (103") of the third lower cylinder (103) are driven in rotation, whereas a transmission group (58') transmits the motion of the first section (103') of the third lower cylinder (103) to the first section (102') of the second lower cylinder (102), and a further transmission group (58") transmits the motion from the second section (103") of the third lower cylinder (103) to the second section (102") of the second lower cylinder
(102) .
2. A roving frame according to claim 1, wherein the first lower cylinder (101) is continuous between the first and the second end.
3. A roving frame according to claim 1, wherein the first lower cylinder (101) consists of a first section (101') and a second section (101, f), coaxial and separated.
4. A roving frame according to any one of the preceding claims, wherein the drafting device (10) comprises a fourth lower cylinder (104) between the second lower cylinder (102) and the first lower cylinder (101) .
5. A roving frame according to claim 4, wherein the fourth lower cylinder (104) is continuous between the first and the second end of the frame.
6. A roving frame according to claim 4, wherein the fourth lower cylinder (104) consists of a first section (104') and a second section (104, f), coaxial and separated .
7. A roving frame according to any one of the preceding claims, comprising an electronic unit to control the operation of the entire frame, operatively connected to the components of the frame to receive control signals and send command signals.
PCT/IB2019/059482 2018-11-06 2019-11-05 Roving frame with segmented drafting cylinders WO2020095194A1 (en)

Priority Applications (5)

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JP2021524067A JP7481338B2 (en) 2018-11-06 2019-11-05 Roving frame with segmented draft cylinders
CN201980071457.2A CN112955591B (en) 2018-11-06 2019-11-05 Roving frame with segmented drafting roller
EP19812847.2A EP3877575B1 (en) 2018-11-06 2019-11-05 Roving frame with segmented drafting cylinders
ES19812847T ES2940746T3 (en) 2018-11-06 2019-11-05 Roving frame with segmented drawing cylinders
JP2024017644A JP2024042101A (en) 2018-11-06 2024-02-08 Roving frame with segmented draft cylinder

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IT102018000010073A IT201800010073A1 (en) 2018-11-06 2018-11-06 SPINDLE BENCH WITH SEGMENTED IRONING CYLINDERS

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CN112955591A (en) 2021-06-11
IT201800010073A1 (en) 2020-05-06
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JP2024042101A (en) 2024-03-27
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