WO2015004684A2

WO2015004684A2 - A system for reducing rejection of low content bobbins

Info

Publication number: WO2015004684A2
Application number: PCT/IN2014/000461
Authority: WO
Inventors: Abhay Shukla; Ashutosh Kumar
Original assignee: Trident Limited
Priority date: 2013-07-12
Filing date: 2014-07-10
Publication date: 2015-01-15
Also published as: WO2015004684A3

Abstract

A system for reducing the rejection of low content bobbins whereby a copper tube is used to blow the yarn vertically along the length of bobbin leading to open the bobbin till the last layer for searching the yarn end in the manufacturing of yarn to meet the challenge of hard waste generation and idle time of the ring frame machine.

Description

A SYSTEM FOR REDUCING REJECTION OF LOW CONTENT BOBBINS

FIELD OF THE INVENTION

The present invention relates to a system for reducing the rejection of low content bobbins, and more particularly to a system and method to reduce rejection of low content bobbins at the Link- Coner in the manufacturing of yarn.

BACKGROUND OF THE INVENTION Spinning is a part of the textile manufacturing process, where cotton fibers are converted into yarn, then fabrics, which undergo finishing processes, such as bleaching to become textiles. The textiles are then fabricated into clothes or other products. There are different industrial processes available to spin yarn, and also manual processes such as those used by a handicraft community who use hand spinning techniques. Spinning is twisting together of drawn out strands of fibers to form yarn, though it is colloquially used to describe the process of drawing out, inserting the twist, and winding onto bobbins.

The process of manufacturing yarn employs a typical step of winding the yarn in the bobbins and then into finished yarns in cones. During this process bobbins are subjected to air blow by a blower for removing the yarn completely from the bobbins. However, it has been noticed that the conventional blowing processes result in incomplete removal of the yarn and few bobbins are left rotating in CBF path, resulting, in generation of hard waste and high idle time of the ring frame machine.

There have been many processes described in the prior art to find an end of a yarn in a bobbin. A patent numbered US 4858836 describes . a device for finding an end of a yarn whereby an end of a yarn connecting to a layer of the yarn on a bobbin is found and is inserted into a center hole of a bobbin. The device includes an air flow controlling plate located near an outer periphery of a layer of a yarn on a spinning bobbin and a compressed air injection nozzle located in a gap between the air flow controlling plate and the yarn layer of the spinning bobbin.

The device also comprises an air flow controlling plate located near the outer periphery of the layer of yarn on the spinning bobbin and extending in a direction of the axis of the spinning bobbin, an air injection nozzle located in a gap between the air flow controlling plate and the yarn layer on the spinning bobbin, a suction pipe for sucking an end of the yarn to provide a path of yarn extending between the bobbin and the suction pipe and a sensor for detecting whether the cut yarn is inserted in the center hole of the bobbin.

Though the above mentioned patent provides a device for detecting the yarn end for various types of bobbins and introducing an end of the yarn on a bobbin in to a center hole, solving the problem of conventional yarn end finding device where an end of a yarn is occasionally not inserted to a predetermined position, in a step of inserting a yarn into a center hole of the bobbin, the device involves various sub systems like air injection nozzle, air flow controller plate, a suction pipe, and a sensor making the device*complex in structure.

Another prior art US 333474G describes a bobbin handling system which relates to the handling of bobbins, quills or the like which have had yarn disposed therefrom. The system involves a conveyer, a photoelectric detector, two ejecting means to eject the bobbins with little yam and an air nozzle supplied with air under pressure. When the bobbins are taken by the conveyer, the photoelectric detector detects the bobbins with little yarn and eliminate from the conveyer.

Although the system described in the above mentioned prior art is an effective system for eliminating the unnecessary use of manual labour in order to expedite the handling of bobbins and at the same time reduce operating cost, the function of the system is to detect and eject bobbins with a little yarn on them from those bobbins with lot of yarn on them. The ejected bobbins 'with little yarn are tripped and the yarn is sold as waste. Hence, the system does not solve the problem of reducing the wastage of yarn. Therefore, there exists a need to introduce a system which is simple in structure and minimizes the waste generated from rejection of low content bobbins in yarn manufacturing industry, and hence reduce the machine idle time.

SUMMARY OF THE INVENTION

Before the present systems and methods are described, it is to be understood that this invention is not limited to the particular apparatus and methodologies described, as there can be multiple possible embodiments of the present invention which are not expressly illustrated in the present disclosure. It is also to be understood that the terminology used in the description is for the purpose of describing the particular versions or embodiments only, and is not intended to limit the scope of the present invention which will be limited only by the appended claims. The present invention is directed to a system for reducing rejection of low content bobbins comprising: (a) a blowing tube placed vertically along the length of the bobbin; (b) an air blower coupled with the blowing tube.

Preferably the blowing tube is made of copper material.

In an embodiment of the invention, the blowing tube blowing tube has an angle of blowing within a range of 65° - 75 °.

Preferably the blowing tube is placed at an angle of 70 ⁰ and at a height of 8 mm to the bobbin.

In another preferred embodiment, the blowing tube blows the yarn vertically along the length of the bobbin.

Other preferences are described below. The blowing tube has a thickness of 0.2mm, length of 100mm, an internal diameter of 6mm, and an orifice size of 0.5mm. .

The present invention enables the practitioner to increase productivity of yarn by eliminating the idle time of the ring frame machine. The elimination resulted in the productivity increase of 1738.8 kg/month. Also, it reduces the waste generated by the rejection of low content bobbins. Further, the present invention discloses a method for reducing rejection of low content bobbins,in a yarn manufacturing process, comprising the steps: attenuating rovings at a ring frame machine in the yarn manufacturing process, where the rovings are spun and wound to form yarn bobbins; feeding the yarn bobbins to a link coner CBF from the ring frame machine to inspect the yarn bobbins; blowing the yarn bobbins using a blowing tube inclined vertically at an angle of blowing to the yarn bobbins, in a searcher at the link CBF, to find yarn end; and feeding the checked bobbins to winding machine from the ring frame machine, where the yarn bobbins are spun and wound to form yarn cones.

BRIEF DESCRIPTION OF DRAWINGS

The foregoing summary, as well as the following detailed description of preferred embodiments, is better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, there is shown in the drawings example constructions of the invention; however, the invention is not limited to the specific methods and apparatus disclosed in the drawings:

Figure 1 illustrates front view of copper tube used in the link CBF in accordance with an embodiment of the invention; Figure 2 illustrates the copper tube placed vertically along the length of bobbin in the Link Coner CBF in accordance with an embodiment of the invention; and

Figure 3 illustrates a method for reducing rejection of low content bobbins, in a yarn making process, in accordance with an embodiment of the invention. DETAILED DESCRIPTION OF THE INVENTION

This patent describes the subject matter for patenting with specificity to meet statutory requirements. However, the description itself is not intended to limit the scope of this patent. The principles described herein may be embodied in many different forms. illustrative embodiments of the invention now will be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. Indeed, the invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will satisfy applicable legal requirements. Like numbers refer to like elements throughout.

The present invention discloses a system for reducing the rejection of low content, bobbins in textile yarn manufacturing process by searching the yarn end of the low content bobbin by deploying a copper tube to blow yarn vertically along the length of the bobbin. The copper tube blows the yarn vertically along the length of bobbin at a predetermined angle and a height leading to opening the yarn till the last layer for searching the yarn end.

During the process of manufacturing yarn, the bobbins from ring frame machine are passed through link CBF for searching the yarn end. At the link CBF, an air blow searcher is used to search the end of the yarn wound over a bobbin, in order to reject an empty bobbin to the ring frame and a checked bobbin, which is a full wound bobbin, to winding. Thereafter, the ring frame machine feeds the bobbins, containing various contents of yarn winded on them, to link coner winding for winding the yarn into a cone. The major setback in this process is that the low content bobbins are rejected because of the inability of the searcher to locate the yarn end. The major reason for this rejection is the limitation in yarn blowing by the searcher blow pipe. This is because the searcher blower is designed to work upto a certain height of bobbin and hence, couldn't locate the yarn end of the low content bobbins. Resultantly, the low content bobbins rotate in the link CBF section and disrupt the input and output of the ring frame machine resulting in high idle time of the machine. Therefore, to reduce the idle time of the winding machine by reducing the rejection of low content bobbins, the present invention discloses a system that deploys a copper tube in searcher of the link CBF to blow yarn vertically along the length of the bobbin leading to opening the bobbin till last layer of yarn and search the yarn end. Figure 1 illustrates the front view of the copper tube ( 1 ) used in the searcher of the link CBF, in accordance with an embodiment of the present invention. This blowing tube (1) made of copper maintains an angle of blowing to the bobbin to blow air vertically and possesses a rust proof nature due to its copper material. Preferred dimensions of the copper tube (1) are shown in the figure 1. The copper tube (1 ) is able to withhold the angle of blowing for prolong time with, a preferable diameter (orifice size) of 0.5mm, preferably to maintain the air blowing velocity. Further, the copper tube (1 ) preferably, has an internal diameter of 6mm.

Figure 2 illustrates copper tube placed vertically along the length of bobbin in the Link Coner CBF, in accordance with an embodiment of the present invention. In a preferred embodiment of the present invention, a copper tube ( 1 ) is deployed in searcher (3) of the link CBF (4) vertically along the length of the bobbin (2) at an angle to the bobbin to blow yarn so that it can search the end of the yarn in low content bobbins as well. In an embodiment, the angle of blowing at which the copper tube (1) is placed in the searcher with respect to the bobbin may lie within the range of 65°- 75°. In a preferred embodiment, the copper tube (1) is placed at an angle of 70° and. at a height of 8 mm to the bobbins (2). The angle of the copper tube (1 ) blowing the air is crucial and is to be maintained precisely .The copper tube (1) blows air over the bobbin which leads to opening of the bobbin (2) till last layer and enables the searcher (3) for locating the yarn end. Locating the yarn end of the low content bobbin eliminates the rejection of low content bobbins and hence, the low content bobbins doesn't rotate in the link CBF (4) leading to no blockage of the ring frame machine (5). Figure 3 illustrates a method for reducing rejection of low content bobbins in link CBF in a link frame machine for a yarn manufacturing process, in accordance with an embodiment of the present invention. The method shows the steps in a yarn manufacturing process, showing the steps after ring frame machine. Before ring frame machine (5), during the yarn making process, carding is carried out after blow room which involves process of opening and cleaning of cotton, after which slivering (doubling and drafting) is done in a draw frame to form uniform sliver. After this a lap is prepared on lap former machine which is used on comber to remove the short fibers and neps from the material. This material (sliver) is again processed on draw frame (doubling & drafting) which is used to form rovings of yarn on speed frame. Thereafter (in the Fig. 3) at step 302, attenuation of the rovings at the ring frame machine (5) is done, where a roving is spun and wound around a rotating spindle to form a yarn bobbin (2). Further, at step 304, the yarn bobbins (2) are fed to link coner CBF (4), where the yarn bobbins (2) are inspected. Furthermore, at step 306, at link CBF (4), a searcher (3) is deployed with a copper tube ( 1 ) which is vertically inclined at an angle of blowing to the each incoming bobbin (2), in order to search the yarn end by blowing air through the yarn vertically along the length of the bobbin (2) leading to opening the bobbin (2) till the last layer of yarn. Advantageously, the copper tube ( 1 ) helps to blow the yarn till the last layer and successfully finds the end of the yarn. Now, the low content bobbins (2) do not rotate in the CBF (4) path and hence the idle time of the machine (5) is reduced. Hence, using a copper tube (2) in the link CBF (4) reduces the rejection of the low content bobbins (2). in an embodiment of the present invention, the copper tube (1 ) maintains an angle of blowing with respect to the bobbins (2) within a range of 65°- 75°. In a preferred embodiment, the copper tube (1) is inclined at an angle of 70° and at a height of 8mm with respect to the bobbins (2). Furthermore, at step 308, after searching the yarn end, the checked bobbins (2) containing any amount of yarn over it, whether full or bottom bobbin,¾re fed to the winding machine. Here, the yarn bobbins (2) are further spun and wound into a yarn cone. This system greatly reduces the idle time of the ring frame machine (5) and rejection of low content bobbins (2) and increases the productivity of the yarn manufacturing process. After the step 308, where the checked yarn bobbins (2) are spun and wound into yarn cones, it is further checked, at step 3 10, whether the bobbin (2) is finished completely in winding them into cones. If the yarn bobbin (2) is completely wound into a yarn cone, then the yarn manufacturing process ends here. On the other hand, if the bobbin (2) is not completely wound into a yarn cone, at step 312, the bobbin (2) is fed again to the CBF preparation. From here the process goes back to the step 306, where the bobbin (2) is again air blown by the searcher (3) using the copper tube to find the yarn end. Thereafter, the process repeats till the yarn bobbin (2) is completely spun and wound into a yarn cone.

Advantageously, the present invention results in the reduction of hard waste generated in yarn manufacturing and also minimize the idle time of the ring frame machine (5). Further, the present invention can be implemented in all fine count 23 Link coner machines and can be deployed for all fine link coners applied in the textile industry. Furthermore, the system described in the present invention reduces the repetitive efforts of the operator of ring frame machine and increase in moral to challenge a difficult task by reducing physical and mental efforts of the operators.

EXAMPLES

The following example is presented for the purpose of illustrating the invention, and is not intended to be limiting.

Reducing the rejection of low content bobbin and eliminating the idle time of the ring frame machine resulted in the gain of 1738.8 kg/month as described below.

The waiting time of the ring frame per doffing cycle is 6 minutes, and the doffing cycle per day is 3. So the total waiting time per day per ring frame is 1 8 minutes. Also, the production rate of ring frame is 8.4 g per hour, and the total gain in production comes out to be 2.52 Kg per day.

By employing all 23 machines, the total gain in production is 1738.8 Kg per month. This accounted for a monetary benefit of Rs.30.36 Lac per year.

The preceding description has been presented with reference to various embodiments of the invention. Persons skilled in the art and technology to which this invention pertains will appreciate that alterations and changes in the described systems, apparatuses, devices and methods of operation can be practiced without meaningfully departing from the principle, spirit and scope of this invention.

Claims

We claim,

1 . A system for reducing rejection of low content bobbins, in a yarn manufacturing process, comprising:

(a) a blowing tube placed vertical ly and at an angle of blowing with respect to the length of the bobbin; and

(b) an air blower coupled with the blowing tube.

2. A system for reducing rejection of low content bobbins as claimed in claim 1 , wherein the blowing tube is made of copper.

3. A system for reducing rejection of low content bobbins as claimed in claim 1 , wherein the blowing tube has an angle of blowing within a range of 65° - 75 °.

4. A system for reducing rejection of low content bobbins as claimed in claim I , wherein the ^' blowing tube is placed preferably at an angle of 70 ⁰ and at a height of 8 mm to the bobbin.

5. A system for reducing rejection of low content bobbins as claimed in claim I wherein, the blowing tube has a thickness of 0.2 mm.

6. A system for reducing rejection of low content bobbins as claimed in claim I , wherein the blowing tube has a length of 1 00 mm. , .

7. A system for reducing rejection of low content bobbins as claimed in claim 1 , wherein the blowing tube has an internal diameter of 6 mm.

8. A system for reducing rejection of low content bobbins as claimed in claim 1 , wherein the blowing tube has an orifice size of 0.5mm to maintain the air blow velocity.

9. A system for reducing rejection of low content bobbin as claimed in claim I , wherein the blower coupled with the blowing tube blows a yarn vertically along the length of the bobbin.

10. A method for reducing rejection of low content bobbins, in a yarn manufacturing process, comprising the steps:

attenuating rovings at a ring frame machine in the yarn manufacturing process, where the rovings are spun and wound to form yarn bobbins;

feeding the yarn bobbins to a link coner CBF from the ring frame machine to inspect the yarn bobbins;

blowing the yarn bobbins using a blowing tube inclined vertically at an angle of blowing to the yam bobbins, in a searcher at the l ink CB F, to find yarn end; and feeding the checked bobbins to winding machine from the ring frame machine, where the yarn bobbins are spun and wound to form yarn cones.

I I . A method for reducing rejection of low content bobbins as claimed in claim 1 0, wherein the blowing tube is made of copper.

1 2. A method for reducing rejection of low content bobbins as claimed in claim 1 0, wherein the blowing tube has an angle of blowing within range of 65° - 75 °.

1 3. A method for reducing rejection of low content bobbins as claimed in claim 10, wherein the blowing tube is placed preferably at an angle of 70 ⁰ and at a height of 8 mm to the bobbin.

14. A method for reducing rejection of low content bobbins as claimed in claim 10, wherein, the blowing tube has a thickness of 0.2 mm.

1 5. A method for reducing rejection of low content bobbins as claimed in claim 1 0. wherein the blowing tube has a length of 1 00 mm.

16. A method for reducing rejection of low content bobbins as claimed in claim 1 0, wherein the blowing tube has an internal diameter of 6 mm.

1 7. A method for reducing rejection of low content bobbins as claimed in claim 1 0, wherein the blowing tube has an orifice size of 0.5mm to maintain the air blow velocity.