CN113966417B - Combing machine for spinning preparation line - Google Patents
Combing machine for spinning preparation line Download PDFInfo
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- CN113966417B CN113966417B CN202080027729.1A CN202080027729A CN113966417B CN 113966417 B CN113966417 B CN 113966417B CN 202080027729 A CN202080027729 A CN 202080027729A CN 113966417 B CN113966417 B CN 113966417B
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- drafting
- combing machine
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- cylinder
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
- D01G19/00—Combing machines
- D01G19/06—Details
- D01G19/14—Drawing-off and delivery apparatus
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
A combing machine (1) for a spinning preparation line, comprising a plurality of combing heads (2) and a drafting device (600) for each combing head, downstream of the nip and upstream of the deviation means, adapted to draft the combed web.
Description
Technical Field
The subject of the invention is a combing machine for cotton fiber spinning preparation lines.
In the spinning preparation line, after an initial step of opening and cleaning the fibers, a carding operation is performed by a carding machine, after which the fibers form a sliver.
The card sliver coming out of the carding machine is usually subjected to a first draft in a draft machine, in which several sliver are combined together.
A predefined number of sliver, typically 24, 28 or 32, is fed into a lap former to produce a lap that is processed in the comber to obtain a combed sliver in which the fibers are highly parallel and clean.
Background
The basic operation of combing, which follows each other in a more recently constructed traditional machine at speeds of 500-550 strokes per minute, is:
intermittent feeding of the carded sliver;
combing the head of the incoming cotton bundle (tuft) by rotary combing with the grip closed;
superposing and bonding the cotton bundle heads to the sliver previously combed in the preceding cycle, properly retracted by separating the cylinder during its reverse rotation;
combing the tail of the cotton bundles through the straight comb of the clamping part under the condition that the clamping part is opened;
the combed cotton bale is advanced by the detaching cylinder during its forward rotation.
However, the separating cylinders have an alternating rotational movement.
In order to overcome the drawbacks due to the alternating rotational movement of the separating cylinders, solutions have been developed in which the separating cylinders have a unidirectional rotational movement. One solution is shown in document EP-A1-1553219.
Additional schemes are shown in the applicant's name in international applications PCT/IB2019/050158 and PCT/IB 2019/051946.
Object of the Invention
The object of the present invention is to create a combing machine, in particular provided with a separating cylinder with continuous rotary movement (at a constant or variable but unidirectional speed), which is able to ensure a satisfactory level of combed sliver quality.
This object is achieved by a combing machine manufactured according to the invention. The description describes further advantageous embodiments of the invention.
Disclosure of Invention
The invention relates to a combing machine for cotton fiber spinning preparation lines, comprising at least two combing heads, wherein each combing head comprises:
-a nip and a circular comb adapted to comb the fibrous web;
-at least one pair of separating cylinders, downstream of said gripping portion, provided with a unidirectional rotation movement;
-deflection means, arranged downstream of said nip and said separating cylinder, adapted to deflect the sliver in which the combed web is compressed towards a common advancing transverse direction, along which the sliver of the combing head is placed side by side with each other;
-a drafting device downstream of the nip and the separating cylinder and upstream of the deviation means, adapted to draft the combed web;
wherein the drafting apparatus comprises a first pair of drafting cylinders held under pressure along an upstream nip line, and a second pair of drafting cylinders in pressure contact along a downstream nip line downstream of the first pair of drafting cylinders;
wherein the drafting apparatus comprises a pressure device adapted to press a web of stacked cotton bundles between the upstream nip line and the downstream nip line; the pressure device includes:
-an upper drafting belt engaging the first upper drafting cylinder and the deflecting element; and
-a lower drafting belt engaging the first lower drafting cylinder and the further deflecting element;
wherein the upper and lower draw belts travel along respective closed paths and contact each other along a contact section downstream of the upstream nip line,
the deflecting element operates on the upper draw belt with an adjustable load.
The deflecting element is a roller.
The further deflecting element is a baffle.
The drafting device is located upstream of the funnel for compressing the web.
The peripheral speed of the second pair of drafting cylinders is greater than the peripheral speed of the first pair of drafting cylinders.
The baffle has a sliding surface that slides to support a portion of the lower draw down belt.
The sliding surface is arcuate.
The contact section is at least partially superposed to the sliding surface of the baffle.
The contact section is only partially superposed on the sliding surface of the baffle.
The roller is disposed along the sliding surface.
The load can be adjusted by a spring operating on the deflecting element.
Each combing head comprises:
-said at least one pair of separating cylinders in contact with each other, adapted to successively tear off the fibre cotton from the fibre web
Bundles and convey them downstream at a conveying speed;
-a main device provided with a main surface movable at a predefined speed lower than the conveying speed, the main surface being configured such that the cotton bundles successively impact the impact area of the main surface
And partially overlapping to form a web of partially overlapping cotton bundles;
-a transfer device collecting and moving the web of partially overlapped cotton bundles;
-wherein the drafting device is placed downstream of the conveying device and is thereby fed with the web of partially superimposed cotton bundles.
The transfer device includes a transferable pad.
The lower draft belt conforms to the pad of the transfer device.
The combing machine comprises an auxiliary device arranged between the pair of separating cylinders and the main device.
The main device comprises a main cylinder provided with a constant or variable speed continuous rotary movement, wherein the side surfaces of the main cylinder constitute the main surface.
The major surface is gas impermeable.
Drawings
The characteristics and advantages of the comber according to the invention will emerge from the following description, given by way of non-limiting example, according to the accompanying drawings, in which:
fig. 1 shows a schematic view of a combing machine according to the invention, comprising a plurality of combing heads;
fig. 2 is a schematic view of a combing head according to an embodiment of the invention.
Detailed Description
The combing machine 1 according to the invention comprises a fixed frame and a plurality of combing heads 2 aligned along a transverse axis X.
In each combing head 2, the processed sliver advances in the longitudinal direction Y.
Downstream of each comb head 2, a funnel 4 is positioned, whereby the comb strip is compressed into a web N.
The web from each comb 2 is deflected by suitable deflecting means 6 and placed side by side on the pallet so as to travel along a common advancing direction, generally parallel to the transverse direction X.
Each comb head 2 comprises a gripping portion provided with a lower jaw, an upper jaw and a straight comb generally on the lower jaw.
Further, the gripping portion includes a feed cylinder supported by the lower jaw, the feed cylinder being operable to intermittently rotate.
The combing head further includes at least one pair of separating cylinders downstream of the nip.
For example, preferably immediately downstream of and facing the nip is a pair 20' of superimposed separating cylinders 20a ', 20b ', preferably in pressure contact, provided with a continuous rotary movement (at a constant or variable but irreversible speed) in order to drag the sliver segment coming out of the nip, tear off the cotton bundles of the sliver and bring it downstream.
Preferably, the lower separating cylinder 20b ' is motorized or operated in a rotating manner by a kinematic connection with another motorized cylinder, while the upper separating cylinder 20a ', preferably provided with a rubber coating, is in pressure contact with the lower separating cylinder 20b ' and is thereby driven in rotation.
According to one embodiment, an auxiliary cylinder pair 20 is placed downstream of the pair 20' of separating cylinders 20a ', 20b ', the auxiliary cylinder pair comprising: an upper auxiliary cylinder 20a, motorized or operated in a rotating manner, preferably through a kinematic connection with another motorized cylinder; and a lower auxiliary cylinder 20b, which is normally in pressure contact with the upper auxiliary cylinder 20a and is preferably driven in a rotating manner thereby.
The auxiliary cylinders 20a, 20b with peripheral speed Vs have a continuous rotary movement (at a constant or variable but irreversible speed), such as pulling along the sliver segments provided by the separating cylinders 20a, 20b, tearing the cotton bundles off the sliver and bringing them from upstream to downstream.
According to a preferred embodiment, the combing head comprises an auxiliary device 300 comprising said auxiliary cylinders 20a, 20b and respective auxiliary belts 304a, 304b running along respective closed paths, which are defined, for example, by auxiliary deflectors 306a, 306b, 308a, 308b, such as cylinders, rollers, angle elements, etc.
Furthermore, the combing head comprises a main device 26, which is provided, immediately downstream of the auxiliary cylinders 20a, 20b or immediately downstream of the separating cylinders 20a ', 20b', with a movable surface 28, for example rotating, against which the cotton bundles emerging from the auxiliary cylinders 20a, 20b impinge, in particular an impingement zone 29 of said surface 28.
The auxiliary device 300 is adapted to transfer the cotton bundles S ' torn off by the separating cylinders 20a ', 20b ' to said main device 26.
The main surface 28 is provided with a main velocity Va, in particular in the impact region 29.
For example, the main device 26 comprises a main cylinder 30 provided with a continuous rotary movement (at a constant or variable but unidirectional speed) in a clockwise or counter-clockwise direction, having a side surface 30' constituting the main surface 28 of the main device 26.
Side surface 30', major surface 28, is gas impermeable. In other words, no suction holes or gaps are provided on said surface, or if present, as in the case of breathable fabrics, they are not connected to the air suction device.
The main cylinder 30 generally has a diameter greater than that of the main separating cylinders 20a, 20b and a peripheral speed Vm corresponding to the angular speed Wm.
The peripheral velocity Vm of the main cylinder 30 is smaller than the peripheral velocity Vs of the auxiliary cylinders 20a, 20 b.
The carding head further comprises a conveying device 40 on which the bundles of comb webs are carried, leaving the main surface 28 of the main device 26 or the lateral surface 30' of said main cylinder 30; the cotton bundles are transported into a transport area 42 of the transport device 40.
Preferably, the transfer device 40 engages the major surface 28 of the primary device 26; for example, the transfer device 40 is tangential to the lateral surface 30' of the main cylinder 30 along a junction line L.
Preferably, the transfer device 40 is flat in the vicinity of the bonding wire L.
Furthermore, it is preferred that said conveying area 42 of the conveying device 40 is flat.
A central imaginary lower plane P4 passing through the rotation axes of the lower auxiliary cylinder 20b and of the main cylinder 30, said central lower plane P4 intersecting the lateral surfaces of the lower auxiliary cylinder 20b and of the main cylinder 30, defining a lower channel 32, through which the cotton bundles separated from the main surface 28, i.e. from the lateral surface 30', pass, being carried onto the transfer device 40.
A central imaginary upper plane P5 is likewise defined, which passes through the rotation axes of the upper auxiliary cylinder 20a and of the main cylinder 30; the central upper plane P5 intersects the side surfaces of the upper auxiliary cylinder 20a and the side surfaces of the main cylinder 30, defining an upper channel 34.
The lower channel 32 is narrower than the upper channel 34 through which the cotton bundles separated from the main surface 28, i.e. from the side surface 30', pass for being transported onto the transport device 40.
In other words, the cotton bundles separated from the main surface 28, i.e., from the side surface 30', to be carried onto the conveying apparatus 40 pass through the narrower of the two channels created by the lower auxiliary cylinder 20b and the upper auxiliary cylinder 20a with respect to the main surface 28, i.e., the side surface 30', of the main apparatus 26 (referred to as outlet channels).
With reference to the direction of the main speed Va or the direction of the peripheral speed Vm of the upper main cylinder 30 on said joining line L, the conveying zone 42 is positioned facing the lower channel 32, for example upstream of the joining line L.
Further, it is preferred that the conveying device 40 is movable, i.e. provided with a support speed Vs predefined in the conveying area 42.
For example, the combing heads are provided with movable pads 50 which move along a closed path, preferably outside the main cylinder 30, and which for at least one section constitute said transfer device 40.
The speed of the pad 50 in the transfer area 42 corresponds to said support speed Vs and matches the direction of the main speed Va or the direction of the peripheral speed of the main cylinder 30 on the joining line L.
For example, on the junction line L, the pad 50 is tangential to the main surface 28 or the side surface 30' of the main cylinder 30.
Preferably, the pad 50 surrounds at least one deflector tin Lin Juanrao in order to follow its closed path.
The operation of the above-described combing head is described in detail in International application PCT/IB2019/051946, the teachings of which are expressly incorporated herein.
The combing heads according to the invention also comprise a drafting device 600 positioned downstream of the nip, but upstream of the deviation means 6 of each combing head 2, in particular upstream of the funnel 4 thereof.
In particular, the drafting device 600 is located downstream of the main device 26, or downstream of the main cylinder 30, and fed by the conveying device 40.
The drafting arrangement 600 comprises a first pair 602 of drafting cylinders 602a, 602b, wherein the first lower drafting cylinder 602b is preferably motorized, while the first upper drafting cylinder 602a is engaged under pressure with the first lower drafting cylinder 602b and is thus driven in a rotating manner.
The drafting apparatus 600 further comprises an upper drafting belt 604a which engages the first upper drafting cylinder 602a and a deflecting element, for example a roller 606.
The draft device 600 also includes a lower draft belt 604b that engages the first lower draft cylinder 602b and additional deflection elements such as a baffle 608.
According to a preferred embodiment, the lower draw tape 604b conforms to the pad 50 of the transfer device 40.
Preferably, the flap 608 has a T-shaped cross section and a sliding portion 610 having a preferably arcuate sliding surface 612 over which the lower draw tape 604b slides.
Further, preferably, a roller 606 is arranged at the sliding surface 612.
The lower and upper draw tapes 604b, 604a contact each other for their respective path contact segments 614.
An imaginary plane C passing through the rotation axis of the first upper cylinder 602a and the rotation axis of the first lower cylinder 602b intersects the contact segments 614 of the two belts 604a, 604b on an upstream clamp line P'.
Furthermore, it is preferred that the upper draw belt 604a be separated from the lower draw belt 604b downstream of the contact section 614 before the lower draw belt 604b is deflected by the baffle 610. In other words, downstream of the contact section 614, the lower draw tape 604 is supported by the sliding surface 612 for further forward travel before turning into the return section of the closed path.
Comber bars exiting the first pair 602 of drafting cylinders 602a, 602b advance at a predefined upstream speed V1.
The drafting apparatus 600 further comprises a second pair 620 of drafting cylinders 620a, 620b, which are arranged downstream of the first pair 602.
The second lower drafting cylinder 620b is preferably motorized, while the second upper drafting cylinder 620a is in pressure contact with the second lower drafting cylinder 620b and is driven in a rotating manner thereby.
The imaginary plane C "including the rotation axis of the second upper drafting cylinder 620a and the rotation axis of the second lower drafting cylinder 620b includes a downstream nip line P" along which the second upper drafting cylinder 620a contacts the second lower drafting cylinder 620 b.
The second pair 620 of drafting cylinders 620a, 620b has a peripheral velocity V2, referred to as downstream velocity, which is greater than downstream velocity V1, such that the combed sliver simultaneously engaged between the first pair 602 of drafting cylinders 602a, 602b undergoes drafting in the contact section 614 and between the drafting cylinders 620a, 620b of the second pair 620.
According to a preferred embodiment, the load at which the draw tapes 604a, 604b contact each other along the contact section 614 is adjustable.
For example, the load applied by the upper draft belt 604a to the lower draft belt 604b below may be adjusted by using springs with adjustable loads, operating on deflectors or rollers 606, or by using several interchangeable springs each with a predefined load.
Advantageously, downstream of the upstream holding line P', the combed sliver formed by the plurality of superimposed cotton bundles is subjected to controlled drafting, as it is held under pressure between the upper and lower belts 604a, 604 b.
The belts 604a, 604b thus represent examples of more general pressure means suitable for pressing the sliver of the superimposed cotton bundle between the upstream gripping line P' and the downstream gripping line P ".
According to an additional embodiment, the pressure device comprises a lower guide on which the sliver of the superimposed cotton bundle runs and an upper belt pressing the sliver onto the guide.
According to a preferred embodiment, the combing head of the combing machine is moved by means of a circular comb shaft for the respective circular comb, an upper and a lower partial shaft for separating the cylinder and similarly for assisting the cylinder.
According to another embodiment, the combing machine comprises electronic adjusting means suitable for adjusting the speed of the main surface 28 or the rotation speed of the main cylinder 30. Advantageously, by means of said speed control means, the degree of overlap between the cotton bundles can be adjusted.
For clarity, the above description has been made with reference to a combing head provided with a separating cylinder with unidirectional rotary motion; however, according to a variant of the invention, the drafting device can also be used in the context of a conventional combing machine provided with separating cylinders having an alternating rotary motion.
The above embodiments should not be considered exclusive; conversely, features that are described with respect to one embodiment may be combined together or separately with one or more features that are described with respect to other embodiments.
Innovatively, the combing heads according to the invention produce high quality combed sliver, since the latter is subjected to controlled drafting downstream of the main cylinder.
It is obvious to a person skilled in the art that modifications can be made to the combing head described above in order to satisfy contingent needs, all of which are included within the scope of protection defined by the following claims.
Claims (14)
1. Comber (1) for cotton fiber spinning preparation lines, comprising at least two comber heads (2), wherein each comber head comprises:
-a nip and a circular comb adapted to comb the fibrous web;
-at least one pair of separating cylinders, downstream of said gripping portion, provided with a unidirectional rotation movement;
-deflection means, arranged downstream of said nip and said separating cylinder, adapted to deflect the sliver (N) in which the combed web is compressed towards a common advancing transverse direction (X) along which the combers are placed side by side with each other;
-a drafting device (600), downstream of the nip and the separating cylinder and upstream of the deviation means, adapted to draft the combed web;
wherein the drafting device (600) comprises a first pair (602) of drafting cylinders (602 a, 602 b) held under pressure along an upstream nip line (P '), and a second pair (620) of drafting cylinders (620 a, 620 b) in pressure contact along a downstream nip line (P') downstream of the first pair (602) of drafting cylinders;
wherein the drafting device (600) comprises a pressure device adapted to press a web of stacked cotton bundles between the upstream nip line (P') and the downstream nip line (P "); the pressure device includes:
-an upper drafting belt (604 a) engaged with the first upper drafting cylinder (602 a) and the deflecting element; and
-a lower drafting belt (604 b) engaging the first lower drafting cylinder (602 b) and the further deflecting element;
wherein the upper (604 a) and lower (604 b) drafting belts run along respective closed paths and contact each other along a contact section (614) downstream of the upstream nip line (P'),
the deflecting element operates with an adjustable load on the upper drawing belt (604 a),
wherein each combing head comprises:
-said at least one pair (20 ') of separating cylinders (20 a ', 20b ') in contact with each other, adapted to tear the fibre tows successively from the fibre web and convey them downstream at a conveying speed;
-a main device (26) provided with a main surface (28) movable at a predefined speed lower than the conveying speed, the main surface (28) being configured such that the cotton bundles successively impinge on an impingement area (29) of the main surface (28) and are partially superposed, forming a web of partially superposed cotton bundles;
-a transfer device (40) that collects and moves the web of partially superimposed cotton bundles;
wherein the drafting device (600) is placed downstream of the conveying device (40) and is thereby fed with the web of partially superimposed cotton bundles,
wherein the main device (26) comprises a main cylinder (30) provided with a constant or variable speed continuous rotary movement, wherein a side surface (30') of the main cylinder (30) constitutes the main surface (28).
2. Combing machine according to claim 1, wherein the deflecting element is a roller (606).
3. Combing machine according to claim 2, wherein the further deflecting element is a baffle (608).
4. Combing machine according to claim 1, wherein the drafting device is located upstream of the funnel (4) for compressing the web.
5. Combing machine according to claim 1, wherein the peripheral speed of the second pair (620) of drafting cylinders (620 a, 620 b) is greater than the peripheral speed of the first pair (602) of drafting cylinders (602 a, 602 b).
6. A combing machine according to claim 3, wherein the apron (608) has a sliding surface (612) that slides to support a portion of the lower drafting belt (604 b).
7. Combing machine according to claim 6, wherein the sliding surface (612) is arched.
8. Combing machine according to claim 6, wherein the contact section (614) is at least partially superimposed on the sliding surface (612) of the apron (608).
9. Combing machine according to claim 6, wherein the contact section (614) is only partially superimposed on the sliding surface (612) of the apron (608).
10. Combing machine according to claim 6, wherein the roller (606) is arranged along the sliding surface (612).
11. A combing machine according to claim 1, wherein the load is adjustable by a spring operating on the deflecting element.
12. Combing machine according to claim 1, wherein
-the transfer device (40) comprises a transferable pad (50); and
-the lower drafting belt (604 b) coincides with the pad (50) of the conveying device (40).
13. Combing machine according to claim 1, comprising an auxiliary device (300) arranged between the pair (20 ') of separating cylinders (20 a ', 20b ') and the main device (26).
14. Combing machine according to claim 1, wherein the main surface (28) is impermeable to air.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102019000005608 | 2019-04-11 | ||
| IT102019000005608A IT201900005608A1 (en) | 2019-04-11 | 2019-04-11 | COMBING MACHINE OF A SPINNING PREPARATION LINE |
| PCT/IB2020/052861 WO2020208454A1 (en) | 2019-04-11 | 2020-03-26 | Combing machine for a spinning preparation line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113966417A CN113966417A (en) | 2022-01-21 |
| CN113966417B true CN113966417B (en) | 2023-08-25 |
Family
ID=67262925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080027729.1A Active CN113966417B (en) | 2019-04-11 | 2020-03-26 | Combing machine for spinning preparation line |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3953507B1 (en) |
| JP (1) | JP7423650B2 (en) |
| CN (1) | CN113966417B (en) |
| IT (1) | IT201900005608A1 (en) |
| WO (1) | WO2020208454A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202200008438A1 (en) | 2022-04-28 | 2023-10-28 | Marzoli Machines Textile Srl | COMBING MACHINE EQUIPPED WITH MEANS OF ORIENTATION OF THE FIBERS OF THE EDGES OF THE FIBER PIECE AND RELATED METHOD |
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2020
- 2020-03-26 CN CN202080027729.1A patent/CN113966417B/en active Active
- 2020-03-26 WO PCT/IB2020/052861 patent/WO2020208454A1/en active Search and Examination
- 2020-03-26 JP JP2021553857A patent/JP7423650B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP2022527046A (en) | 2022-05-30 |
| EP3953507A1 (en) | 2022-02-16 |
| IT201900005608A1 (en) | 2020-10-11 |
| JP7423650B2 (en) | 2024-01-29 |
| CN113966417A (en) | 2022-01-21 |
| WO2020208454A1 (en) | 2020-10-15 |
| EP3953507B1 (en) | 2023-03-29 |
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