JP3235971U - A device for compressing yarn in a spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of simultaneously compressing a yarn and removing dust from the spinning machine.
A device 20 for compressing _a fiber yarn W1 is in pressure contact with a first pair of stretching cylinders 4a and 4b, an auxiliary cylinder 14a on the downstream side of the first pair of stretching cylinders, and the auxiliary cylinders 14a thereof. An auxiliary pair of cylinders 14a, 14b including a pressure cylinder 14b is provided. The suction table 22 has a suction opening and is arranged between the first pair of stretching cylinders and the auxiliary pair of cylinders. The auxiliary belt, which has air permeability and passes over the suction opening, slides on the suction table. The auxiliary cylinder is driven by a first stretching cylinder.
[Selection diagram] Fig. 1

Description

The present invention relates to a device for compressing a yarn in a spinning machine.

There are many embodiments of compression devices for spinning machines.

Some solutions perform mechanical agglomeration, i.e., they substantially pass the fiber threads through a funnel-shaped duct and pull the fibers together, thereby compressing the threads. However, such a solution does not allow the removal of debris from the yarn.

However, embodiments that utilize a flow of suction air that acts on the fibers to bring them closer together, thereby compressing the yarn, are particularly widespread.

Such solutions are particularly appreciated in that they allow the compression of the yarn and the removal of debris from it at the same time and have significant improvements in the quality of the yarn obtained in the spinning machine. .. An example of one embodiment is described in International Publication No. 2012/063150 in the name of the applicant.

International Publication No. 2012/063150 Pamphlet

An object of the present invention is to create a compression device that is improved as compared with the solution of the prior art.

Such an object is achieved by the compression device according to claim 1 below. Dependent claims describe a variant of the embodiment.

The characteristics and advantages of the compression device according to the present invention will be apparent from the following description, which is made as a non-limiting example according to the attached figure.

It is sectional drawing by the plane including the advancing direction of the fiber yarn of the drawing apparatus of the spinning machine provided with the compression apparatus by this invention. It is a figure which shows the modular compression group by this invention by the observation point on the input side. It is a figure which shows the modular group of FIG. 2 from the viewpoint of an output side. It is a figure which shows the modular group of FIG. 2 engaged with the transport means. It is sectional drawing of the modular group of FIG. 4 by the plane perpendicular to the advancing direction of a yarn. It is a figure which shows the drive means of the auxiliary cylinder of the compression device by this invention. It is sectional drawing of the drive means of the auxiliary cylinder of a stretching device and a compression device. It is a figure which shows the drive assembly which provided the drive means of an auxiliary cylinder, and the support carriage of a pressure cylinder. It is a figure which shows the transmission group of the drive means of FIGS. 6, 7, and 8. It is a figure of the suction device for the compression device by this invention. It is a figure which shows the modular compression group by another embodiment of this invention. It is a figure which shows the modular group of FIG. 11 from above. FIG. 11 is a cross-sectional view of the modular group of FIG. 11 with a plane perpendicular to the advancing direction of the yarn. FIG. 11 is a cross-sectional view of the modular group of FIG. 11 with a plane parallel to the advancing direction of the yarn. It is a figure which shows the transmission group of the drive means by another embodiment. It is a figure which shows the driving means of the auxiliary cylinder of the compression device by another embodiment of this invention. It is a figure which shows the drive assembly which provided the drive means of the auxiliary cylinder, and the support carriage of a pressure cylinder by another embodiment of this invention. It is a figure which shows the transmission group of the drive means by another embodiment of this invention.

The spinning machine in the spinning line includes a plurality of spinning points, each spinning point comprising a spindle for forming a reel of yarn.

Each spinning point further includes a drawing device 1 in which the yarn W1 advances in and out the drawn yarn, and a compressed yarn W3, which is usually twisted and wound to form a reel. The compression device 20 that appears is provided.

According to a preferred embodiment, the drawing device 1 rests on the first lower side or the drawing cylinder 4a and comes into contact with the first lower side or the drawing cylinder 4a in the direction opposite to the advance of the yarn under pressure. The pressure cylinder 4b and the first pair of cylinders formed from the above are provided and stretched while transporting the yarn.

The stretching device 1 further comprises a second pair of cylinders formed from a second stretching cylinder 6a and a second pressure cylinder 6b on the upstream side of the first pair of cylinders, and a second pair of cylinders. It comprises a third stretching cylinder 8a and a third pair of cylinders formed from a third pressure cylinder 8b on the upstream side.

The pair of cylinders has different rotational speeds to achieve stretching while advancing the yarn, and usually the peripheral rotational speed of the second pair of cylinders is higher than that of the third pair of cylinders, the first. The perimeter rotation speed of the pair of cylinders is greater than that of the second pair of cylinders.

The ratio between the ambient speeds of rotation defines the stretch ratio, and usually the stretch ratio between the second pair of cylinders and the third pair of cylinders is the first pair of cylinders and the second pair of cylinders. Much smaller than the draw ratio between and, this is because the draw of the thread is slight between the third pair of cylinders and the second pair of cylinders, and the second pair of cylinders and the first pair. It means that it is very strong with the cylinder of.

Preferably, the stretching device 1 includes a stretching cage 10 in which the second pair of cylinders is a part between the third pair of cylinders and the first pair of cylinders.

The stretching cage 10 includes an inverted contact portion 12 located on the downstream side of the second pressure cylinder 6b and away from the reverse pressure cylinder 6b, and an upper belt 13 wound around the second pressure cylinder 6b. The upper belt 13 is moved and pulled by the second cylinder 6b and wound around the reversing contact portion 12, thereby forming a closed passage.

The stretching cage 10 further comprises a fixed lower guide 16 and a lower belt 20 wound around a second stretching cylinder 6a. The lower guide 16 is located downstream of the second drawing cylinder 6a at a position away from it and has a main portion 18 that extends primarily in the forward direction of the yarn and terminates next to the abutting portion 12. The lower belt 20 is moved and pulled by the second stretching cylinder 6a and wound around the main portion 18 to form a closed passage.

The two belts 13, 20 are in contact along a section aligned with the gap between the second pair of cylinders and the first pair of cylinders, and the thread is pulled between them. ..

At the exit of the draw cage 10, the yarn passes through a first pair of cylinders, then enters the compressor 20 and exits the compressor 20 as compressed yarn W3.

The compression device 20 includes an auxiliary pair of cylinders on the downstream side of the first pair of stretching cylinders. The auxiliary pair of cylinders comprises an auxiliary cylinder 14a supported at the ends by a pair of rolling bearings 15a, 15 and a respective pressure cylinder 14b that rests on and comes into pressure contact with the auxiliary cylinder.

Preferably, the pressure cylinders 4b, 6b, 8b, 14b and / or the drawing cylinders 4a, 6a, 8a and / or the auxiliary cylinder 14a have a rubber surface to increase adhesion to the yarn in transit.

Preferably, the auxiliary pair of cylinders has a higher perimeter rotation speed than the pair of cylinders on the immediate upstream side to obtain tension in the yarn during transport.

Typically, the draw ratio within the pre-stretched region, i.e., in the illustrated embodiment, between the second pair of stretch cylinders and the third pair of stretch cylinders is variable between 1.10 and 1.40. The stretching ratio within the stretching region, that is, in the illustrated embodiment, the stretching ratio between the first pair of stretching cylinders and the second pair of stretching cylinders is variable between 20 and 60. The tension ratio between the auxiliary pair of cylinders and the first pair of stretching cylinders is variable between 1.01 and 1.10.

The suction device 20 further includes a suction table 22 and an auxiliary cylinder 14a having air permeability and an auxiliary belt 24 wound around the suction table 22 to form a closed passage. The auxiliary belt 24 is held between the auxiliary cylinder 14a and the respective pressure cylinders 14b.

The auxiliary belt 24 passes over the suction opening 34 of the suction table 22, and the thread to be compressed positions itself above it.

Suction tables 22 located downstream of the first pair of stretching cylinders and upstream of the auxiliary pair of cylinders are of the first pair of stretching cylinders very close to the minimum distance point along the advancing direction of the thread. It extends between the void and the void in the extension cylinder of the auxiliary pair very close to the minimum distance point.

The suction table 22 has a preferably flat main surface 30 on which the auxiliary belt 24 slides, the main surface 30 has a suction opening 34, and the suction opening 34 can operate as a forced suction means. It is connected to and exerts a suction action on the thread being transported on the air permeable auxiliary belt 24.

Preferably, the suction opening 34 has an elongated slot shape along the opening axis K that is tilted along the advancing direction of the thread, eg, in relation to the advancing direction Z.

Preferably, the suction table 22 further comprises a pair of channeling walls 38 protruding from the main surface 30 on which the auxiliary belt 24 is placed.

Preferably, the auxiliary belt 24 is in contact with the surface of the first lower cylinder 4a within its closed passage for at least one section. Advantageously, this makes it possible to clean dirt, debris, and fibers from the auxiliary belt 24.

The compression device 22 further comprises a transport means for transporting the flow of suction air, which transport means is suitable for defining a transport chamber for the thread to be compressed near the suction opening 34.

According to a preferred embodiment, the transport means comprises a plate 40 applicable to the suction table 22 on the main surface 30, eg, on the side leaning against its channeling wall 38.

The plate 40 has an inner surface facing the main surface 30 and an opposite outer surface. When the plate 40 is applied to the suction table 22, a transport chamber through which the threads are compressed is formed between the inner surface of the plate 40 and the main surface 30 of the suction table 22.

Preferably, the plate 40 has a recess 42 (and preferably a recess similar to the output side) on the input side of the thread, which, together with the suction table 22, defines the inlet of the thread to be compressed. (Preferably, a similar depression on the output side defines the outlet of the compressed thread).

Advantageously, the transport means for transporting the flow of suction air from the suction opening 34 enhances the suction action.

Preferably, the transport means further include non-rigid support means suitable for supporting the transport means and position themselves in a manner that accommodates the suction table 22.

For example, the support means 44 includes a cylindrical or spherical constraint that applies to the plate 40, whereby the plate accommodates the suction table 22 and positions itself in a manner that absorbs mechanical or assembly tolerances.

According to a preferred embodiment, the compression device further comprises at least one tensioner 46 for the auxiliary belt 24.

For example, the tensioner 46 is a gravity type.

The modular suction group 50 according to the present invention comprises a pair of tables 22 and a pair of auxiliary belts, respectively, applied to two adjacent spinning points.

The modular group 50 comprises a single main suction duct 52 extending along the main suction direction X.

The modular group 50 further comprises a junction 54 from which the main suction duct 52 protrudes, the junction 54 extending along a junction axis Y perpendicular to the principal suction axis X.

Inside, the junction 54 is hollow and separated by a partition wall 58 extending along the junction axis Y into two compartments 56 for fluid communication with the main suction duct 52.

The modular group 50 further comprises two intermediate ducts 60, each of which is co-located with respect to the two ducts 60 and perpendicular to the junction axis Y and the suction axis X, along the intermediate axis H. Extend.

Each intermediate duct 60 is bounded along the intermediate axis H by a partition wall 58 so as to be separate from each other.

Further, the modular group 50 comprises a pair of hollow end claws 62, each of which is hermetically coupled to their respective intermediate ducts 60 by, for example, an O-ring 64.

The end claw 62 supports the suction table 22 of the compression device by, for example, an O-ring 66 using a sealing engagement, and an elbow duct 68 communicating with the suction opening 34 of the suction table 22 is provided inside the end claw 62. ..

Preferably, the main suction duct 52 is made integrally with connecting means suitable for connecting the modular group 50 to the support frame of the spinning machine.

Preferably, in addition, the junction 54 and the intermediate duct 60 are made integrally, for example by an O-ring 70, which also provides a means of connecting the modular group 50 to the frame of the spinning machine, the main suction duct 52. It is sealed and bonded to the portion containing.

Preferably, the end claws 62 are made integrally and are hermetically coupled to the intermediate duct 60.

Preferably, further, the suction table 22 is made integrally and is hermetically coupled to the end claws 62.

The compression assembly according to the present invention includes a plurality of compression devices 20, that is, a plurality of modular groups 50 aligned along the auxiliary cylinder 14a, and a driving means for moving the auxiliary cylinder 14a.

The drive means comprises a plurality of transmission groups 200, the transmission group 200 from the electric cylinder to the auxiliary cylinder 14a, for example from the extension cylinder, for example from the first extension cylinder 4a of the first pair of extension cylinders to the auxiliary cylinder 14a. Suitable for transmission of rotational movement to.

The transmission group 200 comprises, for example, a rubber or rubber coated idle transmission roller 202 consisting of two separate coaxial wheels 202a, 202b.

The transmission roller 202 is supported by a stem 204 terminating within the base 208.

The transmission group 200 further comprises a support 206 for attachment to the spinning machine frame, crossed by a stem 204.

Preferably, the transfer group 200 further comprises elastic return or extrusion means, which act permanently on the transfer roller 202, eg, via a stem 204, towards the transfer roller 202 towards the support 206. Suitable for returning or pushing the transfer roller away from the support 206.

For example, the elastic means comprises a spring 210 that is placed in a compressed or tense state between the support 206 and the base 208.

The transmission roller 202 comes into contact with the auxiliary cylinder 14a and the electric cylinder, for example, a circular extension cylinder, for example, the first stretching cylinder 4a. The elastic means operates to keep the transmission roller in contact with the two cylinders.

In other words, the drawing cylinders 4a, 6a, 8a are provided with an electric means, for example an electric motor, which is placed in the head of the spinning machine and is usually placed at the end or intermediate position of the spinning machine. The auxiliary cylinder 14a is moved by using a transmission group that obtains its rotational movement from one of the stretching cylinders.

In particular, the transfer rollers 202 are distributed and arranged by at least one modular suction group 50, eg, by two modular suction groups, i.e., at every four spinning points.

The drive assembly 250 according to the present invention comprises a compression assembly, wherein the compression assembly is a plurality of compression devices 20, a plurality of modular groups 50 aligned along an auxiliary cylinder 14a, and an auxiliary cylinder 14a, respectively. Supports a plurality of pressure cylinders 4b aligned and engaged with the extension cylinder 4a, and a plurality of pressure cylinders 14b, pressure cylinders 4b, 14b aligned and engaged with the auxiliary cylinder 14a. It is provided with a driving means for moving the carriage 252 for the purpose.

For example, the carriage 252 comprises a central frame 254, the central frame 254 supporting a pair of coaxial pressure cylinders 14b capable of engaging the auxiliary cylinder 14a on one side and an extension cylinder on the other side. It supports a pair of coaxial pressure cylinders 4b that are engageable with 4a.

The carriage 252 is movable so as to bring the pressure cylinders 4b, 14b into contact with and separate from the respective extension cylinders 4a and 14a, respectively.

The suction device 300 according to the present invention is connected to a plurality of modular groups 50, particularly to a plurality of main suction ducts 52 of the modular group 50.

In particular, the suction device 300 comprises a plurality of end suction ducts 302, each connected to a relative main suction duct 52 of the modular group 50, and a secondary collection duct 304 to which the end suction duct 302 is connected. ..

Each secondary collection duct 304 is closed at one end by a plug 306 that can be opened to clean the secondary collection duct 304.

The suction device 300 comprises a plurality of secondary collection ducts 304 and a single main collection duct 308 operably coupled to the secondary collection duct 304 for suction.

Preferably, the main collection duct 308 is provided with a plug 310 at one end that can be opened to clean the main collection duct 308.

The suction device 300 further comprises a single suction fan, preferably located at one end of the spinning frame and operably coupled to the main collection duct 308 for suction.

The entire spinning machine is thus divided into the following sections, where each section comprises a plurality of spinning points, eg 24 spinning points, to which each of the 12 modular suction groups 50 applies, eg each section. Each time, a modular group is connected to a secondary collection duct 304 for suction. All secondary collection ducts 304 are finally connected to a main collection duct 308, one for each spinning machine, to which a fan is connected for suction.

Each section provides its own auxiliary cylinder 14a and therefore does not extend along the entire spinning machine. Instead, the spinning machine includes a plurality of coaxial and axially separated auxiliary cylinders to facilitate the assembly of the replacement auxiliary belt 24 during maintenance work.

The elastic means acting on the transmission roller 202 allows the transmission roller 202 to be separated from the auxiliary cylinder, allowing the assembly work of the replacement belt.

Innovatively, the compression device according to the present invention is particularly effective.

Advantageously, in addition, the compression device according to the present invention is easy to assemble and disassemble for maintenance work.

According to another advantageous embodiment, the action of the suction air flow is particularly effective.

Advantageously, in addition, the drive means of the auxiliary cylinder shows little wear even after long-term use.

According to another advantageous embodiment, the driving means is usually unaffected by debris or short fibers accumulating in the transmission device of the prior art solution.

According to yet another advantageous embodiment, the suction device according to the present invention minimizes the power used while providing a single fan, and makes it possible to easily perform a debris cleaning operation.

According to the modified form of the present invention, the compression device is downstream of the third pair of stretching cylinders and upstream of the second pair, or downstream of the second pair of stretching cylinders and the first pair of cylinders. It is located on the upstream side of.

According to another embodiment, the auxiliary pair of cylinders 14a, 14b has a peripheral rotation speed smaller than that of the pair of cylinders immediately upstream, for example, smaller than the peripheral speed of the first pair of stretching cylinders 4a, 4b. Achieves compression of yarn in transit by deceleration.

For example, the ratio between the perimeter of the cylinders 14a, 14b of the auxiliary pair of cylinders to the perimeter of the cylinders 4a, 4b of the first pair of stretching cylinders varies from 0.9 to 1.1. It is a thing.

According to yet another embodiment, the portion of the auxiliary cylinder 14a in contact with the auxiliary belt 24 is smooth, i.e., has no scratches or areas machined to increase the grip of the belt.

Preferably, the suction opening 34 has an elongated shape in the advancing direction of the thread, which is parallel to the advancing direction Z.

Preferably, the suction table 22 further comprises a pair of channeling walls 38 projecting from the main surface 30 so that the auxiliary belt 24 is visible between the pair of channeling walls 38, ie the suction table 22. Does not have a attached plate.

Further, according to another embodiment, the tensioner 46 for the auxiliary belt 24 is, for example, a bronze rod 148 to which the auxiliary belt 24 is loosely attached to at least one bush 146 on which the auxiliary belt 24 moves. And prepare. The rod 148 is adjustable in height, thereby forcing the auxiliary belt 24 to tension.

According to another embodiment, the end claws 62 and the suction table 22 are made integrally and such a single component is applied to each intermediate duct 60.

According to yet another embodiment, the transmission unit 200 comprises an idle transmission roller 202, the idle transmission roller 202 being supported by a stem 204, for example cushioned by the use of elastic elements, to frame the spinning machine. The stem 204 is hinged to the support 206 for attachment to the support 206 and further coupled by using an engaging lever 207 that is hinged to the support 206.

In particular, the hinge axis J1 between the support 206 and the stem 204 is parallel and separated in relation to the hinge axis J2 between the stem and the lever 207, whereby the rotation of the lever 207, which is normally manual, is , With immediate lifting or lowering of the transmission roller 202.

When the engagement lever 207 is lowered, the transmission roller 202 contacts the auxiliary cylinder 14a and the electric cylinder, eg, the extension cylinder, in a preferably cushioned manner, and when the engagement lever 207 is lifted, transmission. The roller 202 is disengaged from the auxiliary cylinder 14a.

Still according to yet another embodiment, the drive means transfers the rotary motion from the electric cylinder to the auxiliary cylinder 14a, for example from the extension cylinder, eg, from the first extension cylinder of the first pair of extension cylinders to the auxiliary cylinder 14a. It comprises a transmission group 400 suitable for transmission by using gears.

For example, the transmission group 400 has a first gear 402 that is coaxial with and rotationally integrated with the first stretching cylinder and a second gear 404 that is suitable for meshing with the first gear 402. Auxiliary vehicle 406, which is coaxial with the auxiliary cylinder 14a, is rotatably integrated with the auxiliary cylinder 14a, and is suitable for meshing with the second gear 404.

Preferably, the transmission group 400 further comprises a gearbox 410, which is crossed by an electric cylinder, eg, a first stretching cylinder 4a, engaged with an auxiliary cylinder 14a, into a gear 402, in an oil bath. Includes 404 and 406.

According to a preferred embodiment, several transmission groups 400 are provided.

For example, in a short spinning machine, two transmission groups 400 are provided, one located at one end of the auxiliary cylinder 14a and the other at the other end of the auxiliary cylinder 14a.

In another example, the transmission group 400 is an auxiliary cylinder, such as a long spinning machine, where the first drawing cylinder 14a comprises a separate section aligned axially and also an auxiliary cylinder 14a as well. Provided at each end of the section of 14a. For example, in a spinning machine where the first drawing cylinder 4a is separated into two axially aligned sections, the auxiliary cylinder 14a is also divided into two axially aligned sections and four transmissions. Group 400 is provided.

Further, according to a preferred embodiment, the drive assembly 250 includes a pair of supports 17a and 17b, and the pair of supports 17a and 17b are provided with seats for accommodating a part of the auxiliary cylinder 14a, respectively. In particular, the supports 17a and 17b are forked to allow rapid removal of the auxiliary cylinder 14a.

For example, the seats of the supports 17a and 17b are suitable for accommodating rolling bearings 15a and 15b placed at the ends of the auxiliary cylinders 14a.

In other words, according to the present invention, the auxiliary cylinder 14a is removable.

Claims (16)

A device (20) for compressing a thread (W1).
A first pair of cylinders comprising a lower cylinder (4a) and a pressure cylinder (4b) in pressure contact with the lower cylinder.
An auxiliary pair of cylinders comprising an auxiliary cylinder (14a) and a pressure cylinder (14b) in pressure contact with the auxiliary cylinder, and an auxiliary pair of cylinders on the downstream side of the first pair of cylinders.
A suction table (22) disposed between the first pair of cylinders and the auxiliary pair of cylinders, which is connectable to the suction means and is suitable for generating a suction air flow (suction opening). A suction table (22) provided with 34) and
It has air permeability and is wound around the auxiliary cylinder (14a) and the suction table (22) to form a closed passage, and passes over the suction opening (34) of the suction table (22). A device including an auxiliary belt (24) on which the fiber yarn (Wl) to be compressed is arranged above. The device according to claim 1, wherein the auxiliary pair of cylinders (14a, 14b) has an ambient rotation speed smaller than that of the first pair of cylinders (4a, 4b). The device according to claim 1 or 2, wherein the portion of the auxiliary cylinder (14a) in contact with the auxiliary belt (24) is smooth. The device according to any one of claims 1 to 3, wherein the suction opening (34) has an elongated shape parallel to the advancing direction (Z) of the thread. The invention according to any one of claims 1 to 4, wherein the suction table (22) protrudes from the main surface (30) and includes a pair of channeling walls (38) in which the auxiliary belt 24 is arranged so as to be visible between them. Equipment. A tensioner (46) for the auxiliary belt (24) is provided.
The tensioner is
At least one bush (146) in which the auxiliary belt (24) moves upward and a rod in which the bush is loosely mounted (146) and adjustable in height thereby forcing the auxiliary belt to tension. (148), the apparatus according to any one of claims 1 to 5. 10. The aspect of any one of claims 1 to 6, comprising a transmission group 400 suitable for transmitting rotational motion from the first stretching cylinder (4a) to the auxiliary cylinder (14a) by using at least one gear. Equipment. The device according to claim 7, wherein the transmission group 400 is provided at each end of the auxiliary cylinder (14a). The apparatus according to any one of claims 1 to 8, comprising a pair of supports (17a, 17b) suitable for detachably supporting the auxiliary cylinder (14a). The lower cylinder (4a) is electric and
The device according to any one of claims 1 to 9, wherein the auxiliary cylinder (14a) is driven by the lower cylinder (4a). It is a compression assembly of fiber yarn (Wl).
A first pair of cylinders comprising a lower cylinder (4a) and a pressure cylinder (4b) in pressure contact with the lower cylinder.
An air suction compressor (14a) comprising an auxiliary pair of cylinders comprising an auxiliary cylinder (14a) and a pressure cylinder (14b) in pressure contact with the auxiliary cylinder, wherein the auxiliary pair of cylinders is downstream of the first pair of cylinders. 20) and
A compression assembly comprising a gear driving means for moving the auxiliary cylinder (14a) by using the lower cylinder (4a). A plurality of pressure cylinders (4b) in pressure contact with the lower cylinder and the lower cylinder, and a plurality of coaxial auxiliary cylinders (14a) and the auxiliary cylinder (14a) on the downstream side of the lower cylinder (4a). With multiple pressure cylinders (14b) in contact,
With multiple modular suction groups (50) for hydraulic compression of the fiber yarn (W1),
Each said modular group (50)
With at least one suction table (22) having a suction opening (34) connectable to the suction means,
Each auxiliary belt (24) having air permeability, wrapped around each of the auxiliary cylinders (14a) and each of the suction tables (22) and passing over each of the suction openings (34). And with
The auxiliary cylinder (14a) is a spinning machine that is axially separated for the fitting of the replacement auxiliary belt (24) for maintenance work. A plurality of pressure cylinders (4b) in pressure contact with the lower cylinder and the lower cylinder, and a plurality of auxiliary cylinders (14a) and the auxiliary cylinder (14a) located downstream of the lower cylinder (4a) and coaxial with each other. A plurality of pressure cylinders (14b) that are in pressure contact with 14a),
A plurality of modular suction groups (50) for hydraulic compression of the fiber yarn (Wl), each comprising at least one suction table (22) having a suction opening (34).
A suction device (300) coupled to the modular unit (50) to obtain a flow of suction air from the main opening (34).
The suction device (300)
a) A single main collection duct (308) engaged to the fan,
b) a plurality of secondary collection ducts (304) connected to the main collection duct (308) and c) a plurality of end suction ducts (302) each coupled to the relative modular group (50). , Equipped with
Each secondary collection duct (304) is a spinning machine comprising a suction device connected to a subgroup of the end suction ducts (302). 13. The spinning machine according to claim 13, wherein each secondary collection duct (304) is closed at one end by a plug (306) that can be opened to clean the secondary collection duct (304). 13. The spinning machine of claim 13 or 14, wherein the main collection duct (308) is provided with a plug (310) at one end that can be opened to clean the main collection duct (308). The spinning machine according to any one of claims 13 to 16, wherein the suction device (300) comprises a single fan operably connected to the main collection duct (308) for suction.

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