WO2020129079A1

WO2020129079A1 - Ring-traveller system of a ring spinning machine

Info

Publication number: WO2020129079A1
Application number: PCT/IN2019/050486
Authority: WO
Inventors: N. Parthassarathy
Original assignee: Parthassarathy N
Priority date: 2018-12-18
Filing date: 2019-06-27
Publication date: 2020-06-25
Also published as: CN113423882A; CN113423882B

Abstract

The present invention discloses an assembly for twisting and winding a yarn on a yarn tube mounted on a spindle, the assembly comprising a ring member having plurality of housings uniformly provided along an inner surface of the ring member, plurality of guides housed in the housings wherein a clearance is provided between the housings and the guides, an annular pathway provided inside the ring and having an inlet and plurality of outlets wherein at least one outlet is provided at each of the housing, compressed air is introduced in the annular pathway through the inlet and exits at the housings through the outlets thereby cleaning fibre fluffs or dust accumulated in the clearance space or the guides, and a traveller mounted on the ring member wherein an inner end of the traveller is resting on the guides, when the spindle rotates, the inner end of the traveller moves on the guides thereby preventing direct contact of the inner end of the traveller with the inner surface of the ring member.

Description

TITLE OF THE INVENTION

RING-TRAVELLER SYSTEM OF A RING SPINNING MACHINE

FIELD OF THE INVENTION

[001 ] The present invention generally relates to an assembly for twisting and winding a yarn on a yarn tube. More particularly, the present invention relates to an assembly for twisting and winding a yarn on a yarn tube where the traveller is mounted on plurality of guides provided along the circumference of the ring.

BACKGROUND OF THE INVENTION

[002] In textile industries yarns are made out of different types of fibres such as seed fibres, leaf fibres, baste fibres, manmade fibres and animal fibres etc. Cotton and coir fibres are known as seed fibres. Sisal and banana fibres are called as leaf fibres. Fibres such as flax, hemp, jute, ramie etc. are called as baste fibres. Fibres named as polyester, viscose, modal, bamboo, excel, tencel, nylon and acrylic etc. are manmade fibres. Wool and silk fibres are animal fibres. However all fibres can be classified into three categories in terms of their length as staple fibres (equal and variable length), long fibres (variable length) and continues filament fibres.

[003] in the case of cotton fibres the length of individual fibres varies among them. Moreover the length of the same is comparatively lower than other fibres hence it can be classified as staple fibres with variable length. Coir fibres, leaf fibres, baste fibres and animal fibres are also have variation in length among them, however as the length of the same is comparatively high that can be considered as long fibres with variable length.

[004] Normally manmade fibres are produced in continues filament form. When these fibres are used as it is (without cut), the same are called as continuous filament fibres. When manmade fibres are cut into equal short length (according to the requirement of quality of yarn), the same are called as staple fibres with equal cut length. When these fibres are cut into variable short length (according to the requirement of quality of yarn), the same are called as staple fibres with variable cut length. Yarns are being produced in yarn manufacturing industries with individual (single) variety as well as blends of two or more number of varieties of fibres mentioned above based on the requirement of quality attributes of final product.

[005] As shown in Figure 1 (prior art), generally in single yarn manufacturing, thin ribbon/bunch of fibres are converted into yarn (1) by inserting twist. Twist is inserted by the rotation of spindle (2) and circular dragging (gives tension to the yarn) movement of traveller (4) on surface of ring (3). Meanwhile winding of yarn on tube package (5) also takes place due to lag in speed of traveller with spindle. In the case of multi fold yarn manufacture in ring doubling and heavy doubler machines, twist is inserted to 2 or more number of yarns/filaments (as per no. of folding) by means of rotation of spindle and dragging movement of traveller on surface of ring. When twist is being inserted in single as well as multi fold yarn manufacturing machines, the traveller drags on surface of ring with pressure exerted by the tension of running yarn being spun which results in generation of heat on surfaces of traveller as well as ring due to direct frictional contact between their surfaces. When heat increases beyond some extent, it results in either traveller fly off/losing contact from ring or running yarn would break. Hence the productivity of such machines is limited by traveler speed.

[006] The types of travellers (combination of vertical as well as horizontal cross sections) and rings (vertical cross section) are selected according to the type of fibres used for converting yarn and linear density of yarn being produced.

[007] The diameter and weight of ring and traveller respectively also varies according to the type of fibres used to produce yarn and linear density of yarn being produced.

[008] The short comings of presently used rings and travellers are given below:

1. The productivity of single yarn manufacturing machines (ring frames) and multi fold yarn manufacturing machines (ring doublers/heavy ring doublers) is directly proportional to spindle speeds (spindle revolutions for twist insertion). The spindle speed is limited by traveller speed due to heat generation on the surfaces of rings and travellers at higher traveller speed. Presently the maximum traveller speed in yarn manufacturing machines is around 50 metres per second only. 2. The limitation is not only affects the machine productivity but also affects the operative productivity.

3. The performance of yarn manufacturing industry is rated mainly based on the productivity of yarn manufacturing (ring frames) machines.

4. The working life of rings and travellers is limited due to excessive abrasion and heat generation between their surfaces.

[009] Therefore, there is exists a need for providing a new design of rings and travellers for increasing machine as well as operative productivity of single/multi fold yarn manufacturing machines.

SUMMARY OF THE INVENTION

[010] Accordingly, in one aspect the invention provides an assembly for twisting and winding a yarn on a yarn tube mounted on a spindle the assembly comprising a ring member having plurality of housings uniformly provided along an inner surface of the ring member, plurality of guides housed in the housings wherein a clearance is provided between the housings and the guides, an annular pathway provided inside the ring and having an inlet and plurality of outlets wherein at least one outlet is provided at each of the housing, compressed air is introduced in the annular pathway through the inlet and exits at the housings through the outlets thereby cleaning fibre fluffs or dust accumulated in the clearance space or the guides, and a traveller mounted on the ring member wherein an inner end of the traveller is resting on the guides, when the spindle rotates, the inner end of the traveller moves on the guides thereby preventing direct contact of the inner end of the traveller with the inner surface of the ring member.

[01 1] In some embodiments, width of the traveller is selected to ensure that the inner end of the traveller is always in contact with the surface of adjacent guides.

[012] In some embodiments, minimum width of the traveller is either equal to or greater than the distance between centres of two adjacent guides.

[013] In some embodiments, compressed air (7) is provided either intermittently or continuously.

[014] In some embodiments, more than 50 % of the volume of guide is situated inside the housing to ensure that guides are situated inside the housing during operation of the assembly.

[015] In some embodiments, at least two holders are provided on the guides and corresponding grooves are provided on the housings, the holders are placed inside the grooves to ensure uniformity of the rotation of the guides inside the housings.

[016] In some embodiments, the ring member comprising of a top member and a bottom member, the top and bottom members being connected with bolts.

[017] In some embodiments, the ring member is t shape (t), straight (s), inclined (i), t shape with grooved housing (gt), straight with grooved housing (gs), and inclined with grooved housing (gi). [018] Hollow suction ring (fig. HSR) mounted at the bottom of the spinning ring (fig.SHS) through which DU (fig. DU) unit sucks the dust air liberated from the outlets of housings to ensure clean spinning area. The diameter of the suction ring is equal to the diameter of spinning ring. Ancillary suction holes are provided at inner surface and main suction hole is provided at outer surface through which air is sucked by DU unit. The no. of ancillary suction holes is equal to no. of outlets of spinning ring. Further the round cross sectional inner hollow area and diameter of ancillary holes are gradually decreased from main air outlet to diametrical opposite of the same for ensuring uniform suction throughout the inner surface of suction ring.

[019] DU (dual unit for blowing and sucking air) blows the air to inlets of spinning rings through blowing pipes and sucks the same air from main suction holes of suction rings through suction pipes. The sucked air passes through filter in DU where the dusts are filtered and cleaned air goes to same blowing fan. As blowing and sucking action is carried out simultaneously, the effective cleaning of spinning area is ensured.

BRIEF DESCRIPTION OF THE DRAWINGS

[020] Reference will be made to embodiments of the invention, examples of which may be illustrated in accompanying figures. These figures are intended to be illustrative, not limiting. Although the invention is generally described in context of these embodiments, it should be understood that it is not intended to limit the scope of the invention to these particular embodiments. Fig. 1 shows the working principle of twist insertion in yarn manufacturing machines in accordance with an embodiment of the present invention.

Figs. 2 to 8, and 9 to 18 show the vertical cross section (traveller profile) and horizontal cross section views respectively of various types of travellers presently used in accordance with an embodiment of the present invention.

Figs. 19 to 26 show the cross section views of various types of rings presently used in all the yarn manufacturing machines in accordance with an embodiment of the present invention.

Figs t, s, and i show the model figures of cross section and top views of rings t, s and I respectively in accordance with an embodiment of present invention.

Figs gt, gs, and gi show the model figures of cross section views of rings gt, gs and gi respectively in accordance with an embodiment of present invention.

Figs. t1 to t35 show the cross section and top views of rings t1 to t35 with guides g1 to g35, housings t1 h to t35h, clearances ti c to t35c and traveller profiles ti p to t35p respectively in accordance with an embodiment of present invention (refer table 1 ).

Figs. s1 to s35 show the cross section and top views of rings s1 to s35 with guides g1 to g35, housings s1 h to s35h, clearances si c to s35c and traveller profiles si p to s35p respectively in accordance with an embodiment of present invention (refer table 2).

Figs. M to i35 show the cross section and top views of rings M to i35 with guides g1 to g35, housings i 1 h to i35h, clearances i1 c to i35c and traveller profiles i 1 p to i35p respectively in accordance with an embodiment of present invention (refer table 3).

Figs. gt1 to gt35 show the cross section view of rings gt1 to gt35 with guides (with holders - 20) ghr1 to ghr35, housings (grooved - 21 ) gt1 h to gt35h and clearances gt1 c to gt35c respectively in accordance with an embodiment of present invention (refer table 4).

Figs. gs1 to gs35 show the cross section view of rings gs1 to gs35 with guides (with holders - 20) ghr1 to ghr35, housings (grooved - 21 ) gs1 h to gs35h and clearances gs1 c to gs35c respectively in accordance with an embodiment of present invention (refer table 5). Figs gi 1 to gi35 show the cross section view of rings gi1 to gi35 with guides (with holders - 20) ghr1 to ghr35, housings (grooved - 21 ) gi1 h to gi35h and clearances gi1 c to gi35c respectively in accordance with an embodiment of present invention (refer table 6).

Fig. tra shows the model front view of traveller area with guide, housing and clearance of t, s and i rings in accordance with an embodiment of present invention.

Fig. tra1 to tra35 shows the front view of traveller areas with guides g1 to g35 and respective housings with clearances of rings t1 to t35, s1 to s35 and M to i35 in accordance with an embodiment of present invention.

Fig. trag shows the model front view of traveller area with guide (with holders - 20) , housing (grooved - 21 ) and clearance of rings gt, gs and gi in accordance with an embodiment of present invention.

Figs tragi to trag35 show the front view of traveller areas with guides (with holders -20) ghr1 to ghr35 and respective housings (grooved - 21 ) with clearances of rings gt1 to gt35, gs1 to gs35 and g i1 to gi35 in accordance with an embodiment of present invention.

Figs. g1 to g35 show the front, top and side views of guides g1 to g35 respectively in accordance with an embodiment of present invention. Figs u, v, w, x, y and z show the guide holders (20) and grooves (21 ) of housings in accordance with an embodiment of present invention. Figs. t2p, s2p and i2p show the cross section view of top and bottom pieces with joint of rings t/gt, s/gs and i/gi respectively in accordance with an embodiment of present invention.

Fig. tmr, smr and imr shows the cross section views of rings t/gt, s/gs and i/gi with multi rows of guides in accordance with an embodiment of present invention.

Fig. SHS shows the cross sectional views of assembly of ring t/gt, s/gs, i/gi and hollow suction ring in accordance with an embodiment of present invention. Fig. HSR shows the cross section and top views of hollow suction ring in accordance with an embodiment of present invention.

Fig. DU shows the dual unit for blowing and sucking the air in accordance with an embodiment of present invention.

DETAILED DESCRIPTION OF THE INVENTION

[021 ] The present invention is directed towards an assembly for twisting and winding yarn (1 ) on a yarn tube (5) wherein plurality of guides (g/ghr) are housed inside a housing (th/sh/ih/gth/gsh/gih) provided along an inner surface of the a (t/s/i/gt/gs/gi) for preventing any direct contact of the inner end of the traveller with the inner surface of the ring member.

[022] Referring to figures 2-18, figures 2-8 show different types of travelers which can be used in the assembly in accordance with an embodiment of the present invention whereas figures 9-18 show different cross sections travelers which can be used in the assembly in accordance with an embodiment of the present invention. A person skilled in the art can appreciate that different shapes, cross sections and sizes of the travelers are within the scope of the present invention which can be used/changed as per the requirement without going beyond the scope of the present invention. Fig 4a to 4g represent the various types of traveler profiles (vertical cross sections of travelers). Profile 4a is used for low linear density single yarn manufacture as it has low thread passage whereas 4b, 4c and 4d profiles are used for single yarn with medium and high linear density as it has larger thread passage. Profiles 4e, 4f and 4g are used for multi thread yarn manufacture in ring doubling and heavy doubling machines. Fig. 6a - 6j represent the various horizontal cross sections of travelers those are selected according to the type of fibres used for yarn manufacture. For example 6c, 6d and 6e are used for cotton yarns whereas 6a, 6b, 6f and 6g are used for synthetic yarns. Cross sections 6h and 6i are used for blends of natural and man made fibres.

[023] Figures 19-22 show different types rings which can be used in the assembly in accordance with an embodiment of the present invention whereas figures 23-26 show different types of rings with travelers mounted thereon. In an embodiment following six types/shapes of rings can be used alongwith hollow suction ring (HSR):

1 . t - t shape

2. s- straight

3. i - inclined

4. gt - 1 ring with grooved (21 ) housing

5. gs - straight ring with grooved) (21 ) housing

6. gi - inclined ring with grooved (21 ) housing

[024] It is to be noted that the abovementioned references (t,s,i,gt, gs, gi) will be used throughout the specification to indicate/refer to the type of ring used and a person skilled in the art can infer/comprehend which type of ring is used in the assembly accordingly. [025] Figures g1 -g35 show different shapes of guides which can be used in the assembly in accordance with an embodiment of the present invention. A person skilled in the art can appreciate the shape of the guide is a design consideration and can be changed/selected as per requirement.

[026] Figures t, s, i, gt, gs, and gi show different types of rings which can be used in the assembly for twisting and winding a yarn on yarn tube in accordance with an embodiment of the present invention.

[027] In an embodiment, Figure t1 shows an assembly where a t-ring is used and guide of shape as shown in figure g1 is mounted on the ring. Similarly, figure t2 shows an assembly where a t-ring is used and guide of shape as shown in figure g2 is mounted on the ring. Accordingly, a person skilled in the art can comprehend that figures t1-t35 show a t-shape ring mounted with guides as shown in figures g1 -g35 respectively.

[028] In another embodiment Figures s1 -s35 show s-shape ring mounted with guides as shown in figures g1-g35 respectively.

[029] In another embodiment Figures i1 -i35 show i-shape ring mounted with guides as shown in figures g1 -g35 respectively.

[030] In another embodiment, figures ghr1-ghr35 show guides having holders in accordance with an embodiment of the present invention.

[031 ] In another embodiment Figures gt1 -gt35 show t-shape ring having grooved housing mounted with guides with holders as shown in figures ghr1 - ghr35 respectively. [032] In another embodiment Figures gs1 -35 show t-shape ring having grooved housing mounted with guides with holders as shown in figures ghr1 - ghr35 respectively.

[033] In another embodiment Figures gil -35 show t-shape ring having grooved housing mounted with guides with holders as shown in figures ghr1 - ghr35 respectively.

[034] Figure t shows an assembly for twisting and winding a yarn (1 ) on a yarn tube (5) in accordance with an embodiment of the present invention. The assembly comprising a ring member (t) and a traveler (tp) mounted on the ring member. In an embodiment, plurality of housings (th) are uniformly provided along an inner surface of the ring member. Plurality of guides (g) is housed/mounted in the housings. As shown, a clearance (tc) is also provided between the housings and the guides.

[035] In an embodiment, an annular pathway (9) is provided inside the ring member. The annular pathway has an inlet (8) and plurality of outlets (10) wherein at least one outlet is provided at each of the housing. In an embodiment, compressed air (7) is introduced in the annular pathway through the inlet and exits at the housings through the outlets. The compressed air cleans fibre fluffs or dust accumulated in the clearance space or the guides during working of the assembly. In an embodiment, compressed air can be provided either intermittently or continuously depending upon the type of fibres to be used to produce yarn and linear density of yarn being produced. [036] In an embodiment, a hollow suction ring HSR (as shown in figure HSR) is mounted at bottom of spinning rings SHS (as show in fig. SHS) in which ancillary suction holes are provided at an inner surface and a main suction hole is provided at an outer surface thereof. The round hollow cross sectional area is gradually decreased from main suction hole to diametrical opposite of the same to ensure uniform suction throughout the inner surface of suction ring. Air is supplied by a DU unit to inlet of spinning ring through blowing pipes for cleaning housing/guide area and the air is sucked by DU unit through suction holes of hollow suction ring and suction pipes (as shown in figure DU) thereby ensuring clean spinning area. The sucked air is passed through filter in DU unit where the dust particles are filtered. Blowing and sucking actions are carried out simultaneously for getting effective cleaning in spinning area.

[037] Similarly, figures s/i/gt/gs/gi show an assembly for twisting and winding a yarn (1 ) on a yarn tube (5) in accordance with an embodiment of the present invention which is similar to the assembly as described hereinabove. The assembly comprising a ring member (t/s/i/gt/gs/gi) and a traveler (tp/sp/ip) mounted on the ring member. In an embodiment plurality of housings (th/sh/ih/gth/gsh/gih) are uniformly provided along an inner surface of the ring member. Plurality of guides (g/ghr) is housed/mounted in the housings. As shown, a clearance (tc/sc/ic/gtc/gsc/gic) is also provided between the housings and the guides. [038] In an embodiment, more than 50 % of the volume of guides is situated inside the housing to ensure that guides are situated inside the housing while the yarn is being twisted and winded using the assembly.

[039] In an embodiment, width of the traveller (trwc) as shown in figures tra/trag is selected to ensure that the inner end of the traveller is always in contact with the surface of adjacent guides. For instance, width of the traveller is selected as to ensure that the width is either equal or greater than the distance between centres of two adjacent guides. This, in turn, ensures that an inner end of the traveller is always remains in contact with the surface of the guides.

[040] In an embodiment, at least two holders (20/20a) as shown in figures gt/gs/gi/v/y are provided on the guides and corresponding grooves (21/21 a) (as shown in figures gt/gs/gi/u/x) are provided on the housings. The holders are protruding outwardly from the guides and rests on the grooves provided inside the housing. Since the holders are resting inside the grooves, further uniform/stable rotation of the guides inside the housings is achieved.

[041 ] Figure t2p/s2p/i2p shows an embodiment of the present invention where the wherein the ring member comprising of a top member (top piece) and a bottom member (bottom piece), the top and bottom members being connected with the bolts.

[042] Advantageously, Present invention of new designs of rings and travelers tremendously increases the productivity of single and multifold yarn manufacturing machines with high spindle/traveler speed by eliminating friction between the surfaces of rings and travelers. The working life of rings and travelers is increased tremendously due to elimination of direct contact between the surfaces of rings and travellers. As the productivity of machine increases the productivity of operative will also increase. In the case of synthetic yarn manufacture the fibre fusion problem is eliminated by absence of heat between the surfaces of rings and travelers.

[043] In an exemplary embodiment, following tables illustrate the components/features and corresponding the reference numbers which are used in the drawings:



Table 5 (Fig. gsl to gs35 of“gs” rings)

[044] While the present invention has been described with respect to certain embodiments, it will be apparent to those skilled in the art that various changes and modification may be made without departing from the scope of the invention as defined in the following claims.

Claims

I CLAIM:

1 . An assembly for twisting and winding a yarn on a yarn tube mounted on a spindle, the assembly comprising:

a ring member (t/s/i/gt/gs/gi) having plurality of housings (th/sh/ih/gth/gsh/gih) uniformly provided along an inner surface of the ring member,

plurality of guides (g/ghr) housed in the housings wherein a clearance (tc/sc/ic/gtc/gsc/gic) is provided between the housings and the guides; an annular pathway (9/15/18) provided inside the ring and having an inlet (8/8a, 14/14a, 17/17a) and plurality of outlets (10/16/19) wherein at least one outlet is provided at each of the housing, compressed air (7) is introduced in the annular pathway through the inlet and exits at the housings through the outlets thereby cleaning fibre fluffs or dust accumulated in the clearance space or the guides; and

a traveller (tp/sp/ip) mounted on the ring member wherein an inner end of the traveller is resting on the guides, when the spindle rotates, the inner end of the traveller rotates on the guides thereby preventing direct contact of the inner end of the traveller with the inner surface of the ring member.

2. The assembly for twisting and winding a yarn on a yarn tube mounted on a spindle as claimed in claim 1 , wherein the width of the traveller (trwc) is selected to ensure that the inner end of the traveller is always in contact with the surface of adjacent guides.

3. The assembly for twisting and winding a yarn on a yarn tube mounted on a spindle as claimed in claim 2, wherein the width of the traveller (trwc) is either equal or greater than the distance between centres of two adjacent guides.

4. The assembly for twisting and winding a yarn on a yarn tube mounted on a spindle as claimed in claim 1 , wherein the compressed air (7) is provided either intermittently or continuously.

5. The assembly for twisting and winding a yarn on a yarn tube mounted on a spindle as claimed in claim 1 , wherein at least more than 50 % of the volume of guide is situated inside the housing to ensure that guides are situated inside the housing during operation of the assembly.

6. The assembly for twisting and winding a yarn on a yarn tube mounted on a spindle as claimed in claim 1 , wherein at least two holders (20/20a) are provided on the guides and corresponding grooves (21/21 a) are provided on the housings, the holders are placed inside the grooves to ensure further uniformity of the rotation of the guides inside the housings.

7. The assembly for twisting and winding a yarn on a yarn tube mounted on a spindle as claimed in claim 1 , wherein the ring member comprising of a top member (top piece) and a bottom member (bottom piece), the top and bottom members being connected with bolts.

8. The assembly for twisting and winding a yarn on a yarn tube mounted on a spindle as claimed in claim 1 , wherein the ring member is t shape (t), straight (s), inclined (i), t shape with grooved housing (gt), straight with grooved housing (gs), and inclined with grooved housing (gi).

9. The assembly for twisting and winding a yarn on a yarn tube mounted on a spindle as claimed in claim 1 , wherein a hollow suction ring (HSR) is mounted at a bottom of the ring members, the hollow suction ring comprising ancillary suction holes provided an at inner surface and a main suction provided at an outer surface, a DU unit blows the air to the inlet of spinning ring through blowing pipes and sucks the same air through suction holes at hollow ring and suction pipes thereby carrying out blowing and sucking actions simultaneously to get effective cleaning in the areas of housing/guides/spinning.