Pin roller and spinning pin draft mechanism

Abstract

The application discloses a needle tooth roller and a spinning needle tooth drafting mechanism, wherein the needle tooth roller comprises a roller shaft and a plurality of needle teeth. The plurality of needle teeth are fixed on the cylindrical surface of the roller shaft, so that the needle teeth can be inserted into and extracted from the sliver when the needle tooth roller rotates. Compared with the prior art, the needle tooth roller has the needle teeth which can effectively penetrate into the inside of the sliver and fully contact the surface fibers and the inner layer fibers of the sliver. When the needle tooth roller rotates, the needle teeth can draft the fibers, so that the friction field is expanded from the surface layer of the sliver to the entire radial space of the sliver. When the needle tooth roller continues to rotate, the needle teeth are extracted from the sliver. While the needle tooth roller increases the friction field, the fibers drafted on the radial section of the sliver are relatively uniform, so that the sliver evenness is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of spinning, in particular to a needle roller and a spinning needle roller drafting mechanism. BACKGROUND

[0002] Spinning is a process of processing a large number of disordered fibers into an ordered fiber bundle. The drafting process in the spinning process almost runs through the entire spinning process. The drafting in the processes of drawing, roving and spinning is to lengthen and thin the sliver, so that the fibers are rearranged, separated and straightened in the axial and radial directions of the sliver.

[0003] The drafting mechanism of the traditional ring spinning is mostly a three-roller long-short apron drafting mechanism. In the three-roller long-short apron drafting mechanism, the sliver is input by the rear roller, controlled by the elastic nip when passing through the long-short apron, and then enters the front roller, and then is aggregated by the special suction pipe for the bulk spinning, and finally is output by the output roller for twisting. The traditional front roller and long-short apron control the fibers output by the elastic nip through surface pressure and friction. The friction is limited to the fibers in contact with the apron roller and the front roller on the outer surface of the sliver, and the friction is transmitted from the surface fibers to the inner fibers. Therefore, the drafting on the radial cross section of the entire sliver is relatively uneven, and the overall is sparse inside and dense outside. The friction coefficient between fibers (0.2-0.26) is smaller than the friction coefficient between fibers and apron roller (0.26-0.3) and the friction coefficient between fibers and roller (0.26-0.3).

[0004] Therefore, how to make the multiple fibers on the radial cross section of the sliver obtain relatively uniform drafting is a technical problem to be solved by those skilled in the art. SUMMARY

[0005] The purpose of the present application is to provide a needle roller and a spinning needle roller drafting mechanism to make the multiple fibers on the radial cross section of the sliver obtain relatively uniform drafting.

[0006] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0007] The present application discloses a needle roller, comprising a roller shaft and a plurality of needles; the plurality of needles are fixed on the cylindrical surface of the roller shaft, so that the needles can penetrate into the sliver and pull out from the sliver when the needle roller rotates.

[0008] Preferably, the length direction of the needle is the normal direction of the corresponding position of the needle on the cylindrical surface.

[0009] The present application also discloses a spinning needle roller drafting mechanism, comprising the above-mentioned needle roller, and further comprising:

[0010] a first conveying assembly for conveying the sliver to the pin roller;

[0011] a second conveying assembly for conveying the sliver from the pin roller to a twisting zone;

[0012] wherein the first conveying assembly and the second conveying assembly are capable of pressing the sliver against the pin roller so that the pin teeth can be in close contact with the sliver.

[0013] Preferably, the first conveying assembly comprises a back roller assembly, a middle roller assembly and a pressure bar arranged in sequence along the conveying direction of the sliver; the back roller assembly comprises a back roller and a back rubber roller for jointly clamping the sliver and rolling conveying the sliver to the middle roller assembly; the middle roller assembly comprises a middle roller and a middle rubber roller for jointly clamping the sliver and rolling conveying the sliver to the pin roller; the pressure bar is used for tensioning the sliver so that the sliver keeps in contact with the pin roller.

[0014] Preferably, the first conveying assembly comprises a back roller assembly and an apron assembly arranged in sequence along the conveying direction of the sliver; the back roller assembly comprises a back roller and a back rubber roller for jointly clamping the sliver and rolling conveying the sliver to the apron assembly; the apron assembly comprises an upper apron, a lower apron, an upper pin, a lower pin, a lower tensioning rod, a middle rubber roller and a middle roller; the upper pin and the middle rubber roller tension the upper apron from the inner side, the middle rubber roller is used for rotating the upper apron, and the upper pin is in sliding contact with the upper apron; the lower pin, the middle roller and the lower tensioning rod tension the lower apron from the inner side, the middle roller is used for rotating the lower apron, and the lower pin and the lower tensioning rod are both in sliding contact with the lower apron; the upper apron and the lower apron are used for jointly clamping the sliver and rolling conveying the sliver to the pin roller; the upper pin is located between the middle rubber roller and the pin roller, and the lower pin is located between the middle roller and the pin roller, so that a nip is formed between the upper apron and the lower apron, the nip is used for tensioning the sliver so that the sliver keeps in contact with the pin roller.

[0015] Preferably, the second conveying assembly comprises an output roller assembly and an air duct assembly; the output roller assembly comprises an output roller and an output rubber roller, which are used to jointly clamp the sliver and roll convey the sliver to the twisting zone; the air duct assembly is located between the output roller assembly and the pin taker roller, and comprises an air duct and a mesh ring, the air duct has air holes for gathering the sliver; the mesh ring is arranged outside the air holes to separate the sliver from the air holes.

[0016] The present application has the following technical effects relative to the prior art:

[0017] The pin taker roller has pins, which can effectively penetrate into the inside of the sliver and fully contact the surface fibers and inner fibers constituting the sliver. When the pin taker roller rotates, the pins can pull the fibers, so as to expand the friction field from the surface of the sliver to the entire radial space of the sliver. When the pin taker roller continues to rotate, the pins are extracted from the sliver. While the pin taker roller increases the friction field, the fibers stretched on the radial section of the sliver are relatively uniform, so as to effectively improve the sliver evenness. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 It is a partial schematic view of the pin taker roller in the present embodiment;

[0020] Figure 2 It is a schematic view of one embodiment of the spinning pin taker drafting mechanism in the present embodiment;

[0021] Figure 3 It is a schematic view of another embodiment of the spinning pin taker drafting mechanism in the present embodiment;

[0022] Explanation of reference signs: 1-pin taker roller; 2-back roller; 3-back rubber roller; 4-middle roller; 5-middle rubber roller; 6-pressure bar; 7-upper apron; 8-lower apron; 9-upper pin; 10-lower pin; 11-lower tensioning rod; 12-jaw; 13-output roller; 14-output rubber roller; 15-air duct; 16-mesh ring; 17-sliver. DETAILED DESCRIPTION

[0023] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts are within the protection scope of the present application.

[0024] The purpose of the present application is to provide a needle roller and a spinning needle drafting mechanism to make the fibers in the radial cross section of the sliver 17 obtain relatively uniform drafting.

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0026] With reference to Figure 1 , the present embodiment provides a needle roller 1, which comprises a roller shaft and a plurality of needles. The plurality of needles are fixed on the cylindrical surface of the roller shaft, so that the needles can penetrate into the sliver 17 and draw out from the sliver 17 when the needle roller 1 rotates.

[0027] The working principle of the needle roller 1 is as follows: the needles can effectively penetrate into the inside of the sliver 17 and fully contact the surface fibers and the inner fibers constituting the sliver 17. When the needle roller 1 rotates, the needles can draw the fibers, so as to expand the friction field from the surface of the sliver 17 to the entire radial space of the sliver 17. The needle roller 1 continues to rotate, and the needles are drawn out from the sliver 17. While the needle roller 1 expands the friction field, the fibers on the radial cross section of the sliver 17 are also relatively uniform, thereby effectively improving the evenness of the sliver 17.

[0028] As a possible example, the length direction of the needle is the normal direction of the corresponding position of the needle on the cylindrical surface. However, the actual implementation is not limited thereto, and the length direction of the needle can also be at an angle with the normal direction of the corresponding position of the needle on the cylindrical surface.

[0029] With reference to Figure 2 , Figure 3 , the present embodiment also provides a spinning needle drafting mechanism, which comprises the above-mentioned needle roller 1 and further comprises a first conveying assembly and a second conveying assembly. The first conveying assembly is used to convey the sliver 17 to the needle roller 1. The second conveying assembly is used to send the sliver 17 from the needle roller 1 to the twisting zone. The first conveying assembly and the second conveying assembly can press the sliver 17 towards the needle roller 1, so that the needles can be in close contact with the sliver 17.

[0030] Since the spinning needle drafting mechanism has the above-mentioned needle roller 1, the spinning needle drafting mechanism also has the technical effects of the above-mentioned needle roller 1, which will not be described here.

[0031] Referring to Figure 2 , as a possible example, the first conveying assembly comprises a back roller assembly, a middle roller assembly and the pressure bar 6 arranged in sequence along the conveying direction of the sliver 17. The back roller assembly comprises the back roller 2 and the back rubber roller 3 for jointly clamping the sliver 17 and rolling conveying the sliver 17 to the middle roller assembly. The middle roller assembly comprises the middle roller 4 and the middle rubber roller 5 for jointly clamping the sliver 17 and rolling conveying the sliver 17 to the pin taker 1. The pressure bar 6 is used for tensioning the sliver 17 so as to keep the sliver 17 in contact with the pin taker 1.

[0032] Referring to Figure 3 , as a possible example, the first conveying assembly comprises a back roller assembly and a apron assembly arranged in sequence along the conveying direction of the sliver 17. The back roller assembly comprises the back roller 2 and the back rubber roller 3 for jointly clamping the sliver 17 and rolling conveying the sliver 17 to the apron assembly. The apron assembly comprises the upper apron 7, the lower apron 8, the upper pin 9, the lower pin 10, the lower tensioning rod 11, the middle rubber roller 5 and the middle roller 4. The upper pin 9 and the middle rubber roller 5 tension the upper apron 7 from the inner side, the middle rubber roller 5 is used for driving the upper apron 7 to rotate, and the upper pin 9 is in sliding contact with the upper apron 7. The lower pin 10, the middle roller 4 and the lower tensioning rod 11 tension the lower apron 8 from the inner side, the middle roller 4 is used for driving the lower apron 8 to rotate, and the lower pin 10 and the lower tensioning rod 11 are both in sliding contact with the lower apron 8. The upper apron 7 and the lower apron 8 are used for jointly clamping the sliver 17 and rolling conveying the sliver 17 to the pin taker 1. The upper pin 9 is located between the middle rubber roller 5 and the pin taker 1, and the lower pin 10 is located between the middle roller 4 and the pin taker 1, so as to form a nip 12 between the upper apron 7 and the lower apron 8, the nip 12 faces the pin taker 1. The nip 12 is used for tensioning the sliver 17 so as to keep the sliver 17 in contact with the pin taker 1. By changing the position and angle of the upper pin 9 and the lower pin 10, the size and angle of the nip 12 can be adjusted.

[0033] Referring to Figure 2 , Figure 3 , as a possible example, the second conveying assembly comprises an output roller assembly and an air suction pipe assembly. The output roller assembly comprises the output roller 13 and the output rubber roller 14 for jointly clamping the sliver 17 and rolling conveying the sliver 17 to the twisting zone. The air suction pipe assembly is located between the output roller assembly and the pin taker 1, and comprises the air suction pipe 15 and the mesh ring 16, the air suction pipe 15 has air suction holes for gathering the sliver 17. The mesh ring 16 is arranged outside the air suction holes to separate the sliver 17 from the air suction holes, so as to avoid the sliver 17 being sucked into the air suction holes.

[0034] The principles and implementation manners of the present application are described in the specification by using specific examples, and the above examples are only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed. In conclusion, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A spinning needle drafting mechanism, characterized in that, include: A needle roller, comprising a roller shaft and a plurality of needle teeth; the plurality of needle teeth are fixed to the cylindrical surface of the roller shaft so that, when the needle roller rotates, the needle teeth can penetrate and withdraw from the yarn; A first conveying assembly is used to convey the yarn to the needle roller; A second conveying assembly is used to feed the yarn from the needle roller into the twisting zone; The first conveying component and the second conveying component can press the yarn toward the needle roller, so that the needle can make close contact with the yarn. The second conveying assembly includes an output roller assembly and a suction tube assembly; the output roller assembly includes an output roller and an output rubber roller, which together clamp the yarn and roll it towards the twisting zone; the suction tube assembly is located between the output roller assembly and the needle roller, and includes a suction tube and a mesh ring, the suction tube having suction holes for gathering the yarn; the mesh ring is disposed outside the suction holes to separate the yarn from the suction holes; The first conveying assembly includes a rear roller assembly, a middle roller assembly, and a pressure bar arranged sequentially along the conveying direction of the yarn; the rear roller assembly includes a rear roller and a rear rubber roller, which together clamp the yarn and roll it towards the middle roller assembly; the middle roller assembly includes a middle roller and a middle rubber roller, which together clamp the yarn and roll it towards the needle-tooth roller; the pressure bar is used to tension the yarn so that the yarn remains in contact with the needle-tooth roller.

2. A spinning needle drafting mechanism, characterized in that, include: A needle roller, comprising a roller shaft and a plurality of needle teeth; the plurality of needle teeth are fixed to the cylindrical surface of the roller shaft so that, when the needle roller rotates, the needle teeth can penetrate and withdraw from the yarn; A first conveying assembly is used to convey the yarn to the needle roller; A second conveying assembly is used to feed the yarn from the needle roller into the twisting zone; The first conveying component and the second conveying component can press the yarn toward the needle roller, so that the needle can make close contact with the yarn. The second conveying assembly includes an output roller assembly and a suction tube assembly; the output roller assembly includes an output roller and an output rubber roller, which together clamp the yarn and roll it towards the twisting zone; the suction tube assembly is located between the output roller assembly and the needle roller, and includes a suction tube and a mesh ring, the suction tube having suction holes for gathering the yarn; the mesh ring is disposed outside the suction holes to separate the yarn from the suction holes; The first conveying assembly includes a rear roller assembly and a rubber apron assembly arranged sequentially along the conveying direction of the yarn; the rear roller assembly includes a rear roller and a rear rubber roller, which together clamp the yarn and roll it towards the rubber apron assembly; the rubber apron assembly includes an upper rubber apron, a lower rubber apron, an upper pin, a lower pin, a lower tension rod, a middle rubber roller, and a middle roller; the upper pin and the middle rubber roller tension the upper rubber apron from the inside, the middle rubber roller drives the upper rubber apron to rotate, and the upper pin slides in contact with the upper rubber apron; the lower pin, the middle roller, and the lower tension rod... The tensioning rod tensions the lower rubber ring from the inside, and the middle roller drives the lower rubber ring to rotate. The lower pin and the lower tensioning rod are both in sliding contact with the lower rubber ring. The upper and lower rubber rings are used to clamp the yarn and roll it towards the needle-tooth roller. The upper pin is located between the middle rubber roller and the needle-tooth roller, and the lower pin is located between the middle roller and the needle-tooth roller, so that a jaw with an opening facing the needle-tooth roller is formed between the upper and lower rubber rings. The jaw is used to tension the yarn so that the yarn remains in contact with the needle-tooth roller.

3. The spinning needle drafting mechanism according to claim 1 or 2, characterized in that, The length direction of the needle tooth is the normal direction of the corresponding position of the needle tooth on the cylindrical surface.

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