A five-roller drafting system
Through the five-roll drafting system, the spinning process is simplified, and the fine yarn is obtained directly from the sliver generated by the stripping machine, solving the problems of complex processes and poor yarn quality in the traditional process, and achieving efficient and resource-saving spinning Yarn production, and the yarn quality meets the standard of ring-spun fine yarn.
Patent Information
- Application Number
- CN201811470969.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2018-12-04
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2038-12-04
AI Technical Summary
In traditional spinning process, trousers generated by stripping machines need to go through multiple drafting processes to obtain fine yarn, resulting in complex process flow, many equipment configurations, large labor consumption, poor quality of yarn formation, and inability to achieve ring spinning fine yarn. quality standards.
Using a five-roller drafting system, including five rollers and misaligned rubber rollers, the cotton generated directly from the strip machine is achieved by gradually increasing the roller speed and using the traction device and cotton collector. Get thin yarn.
Simplified the spinning process, eliminated the roving process, saved manpower and equipment, improved the spinning efficiency and yarn quality, so that the obtained yarn has the advantages of ring-spinning yarn, including dry strips, strength, hairy and cotton advantages of knots and other aspects.
Smart Images
Figure CN109468714B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of spinning, in particular to a five-roller drafting system for drafting fiber bundles. Background Art
[0002] In cotton spinning equipment, multiple rollers are usually used to stretch the fiber strands. For example, on a ring spinning machine, three rollers are used to stretch the fiber strands. The rotation speed of the three rollers increases from slow to fast, and the fiber strands are stretched and thinned while being transported, thereby achieving the stretching of the fiber strands.
[0003] Due to process requirements, the fiber bundles are drafted many times in the cotton spinning process such as drawing, combing, roving, and spinning. In the traditional process, the noodles made by the drawing machine are first fed into the roving frame to achieve 5-12 times of drafting of the cotton strips, forming a finer roving and winding it on the bobbin. The wound bobbin is sent to the spinning frame, and the roving is fed into the drafting device of the spinning frame for further drafting, forming a finer spun yarn wound on the bobbin.
[0004] To obtain fine yarn, this traditional process requires three types of spinning equipment: drawing frame, roving frame and spinning frame, as well as storage and transportation equipment such as cans and carts, several personnel to transport cotton strips and roving, or automatic transportation equipment such as AGV robots and roving tube conveyor lines. Some new spinning equipment can shorten the process flow, such as rotor spinning and air jet vortex spinning, which eliminate the roving process and directly feed the cotton strips produced by the drawing frame into fine yarn. However, since the twisting and yarn-forming principles are different from those of ring spinning, it is impossible to obtain yarn with the characteristics of ring spinning fine yarn. Summary of the invention
[0005] The present invention provides a five-roller drafting system, which solves the problem that the slivers generated by the drawing frame are twisted after high-multiple drafting to directly obtain spun yarn. The technical solution is as follows:
[0006] A five-roller drafting system comprises a first roller, a second roller, a third roller, a fourth roller and a fifth roller arranged in sequence, and the rollers are clamped by staggered rubber rollers, including the first rubber roller, the second rubber roller, the third rubber roller, the fourth rubber roller and the fifth rubber roller. The cotton strip enters from the fifth roller and is transmitted from the first roller. The rotation speed of the five rollers gradually increases from the fifth roller to the first roller. The roller center distance of adjacent rollers is 30mm-60mm, and the offset distance between the roller and the corresponding rubber roller is 0mm-3mm.
[0007] It also includes a traction device, which uses guide rollers. A pair of guide rollers clamp and pull the cotton strips and the fifth roller to have a drafting effect of 1.1 to 1.2 times, which is used to straighten the fibers.
[0008] The five-roller drafting system is installed on a roller seat, fixed to a frame through the roller seat, and a center line of the five rollers is 45 degrees to the horizontal.
[0009] The center distance between the first roller and the second roller is 40mm~48mm, the center distance between the second roller and the third roller is 35mm~45mm, the center distance between the third roller and the fourth roller is 50mm~57mm, and the center distance between the fourth roller and the fifth roller is 37mm~48mm.
[0010] Furthermore, the roller center distance between the first roller and the second roller is 45 mm, the roller center distance between the second roller and the third roller is 39 mm, the roller center distance between the third roller and the fourth roller is 52 mm, and the roller center distance between the fourth roller and the fifth roller is 48 mm.
[0011] The offset of the roller and the corresponding rubber roller is divided into two directions: forward offset and backward offset. The forward offset is offset toward the first roller, and the backward offset is the opposite. The first rubber roller is offset forward, and the second, third, fourth and fifth rubber rollers are offset backward.
[0012] Furthermore, the offset distance between the first roller and the first rubber roller is 2mm~3mm, the offset distance between the second roller and the second rubber roller is 0mm~1mm, the offset distance between the third roller and the third rubber roller is 2mm~3mm, the offset distance between the fourth roller and the fourth rubber roller is 0mm~1mm, and the offset distance between the fifth roller and the fifth rubber roller is 2mm~3mm.
[0013] Preferably, the offset distance between the first roller and the first rubber roller is 3 mm, the offset distance between the second roller and the second rubber roller is 0.5 mm, the offset distance between the third roller and the third rubber roller is 2 mm, the offset distance between the fourth roller and the fourth rubber roller is 1 mm, and the offset distance between the fifth roller and the fifth rubber roller is 2 mm.
[0014] The speed ratio of the fifth roller to the fourth roller is 1-3, the speed ratio of the fourth roller to the third roller is 3-8, the speed ratio of the third roller to the second roller is 1-2, and the speed ratio of the second roller to the first roller is 13-30.
[0015] A ring spinning frame utilizing the above-mentioned five-roller drafting system, wherein the five-roller drafting system is installed in the ring spinning frame, and a cotton storage device for storing cotton strips of the ring spinning frame is arranged on the upper floor or the same floor as the ring spinning frame equipment.
[0016] The five-roller drafting system has the following beneficial effects:
[0017] 1. The spinning equipment equipped with this drafting device can be directly fed with the slivers generated by the drawing frame, eliminating the previous roving process, thereby eliminating the roving frame, roving tube storage and transportation device, saving manpower, shortening the spinning process, improving efficiency and saving costs.
[0018] 2. The roving obtained in the roving process has twist. Due to the omission of the roving process, the cotton strips are directly drafted. The fiber bundles lack self-binding, which is not conducive to the drafting effect and the subsequent twisting process, and the yarn quality is reduced. The function of the cotton collector is to shrink the width of the yarn strip, reduce the loss of flying flowers and edge fibers, and make the slivers drafted in a relatively tight state, which is conducive to the subsequent twisting process and solves the above problems.
[0019] 3. Two sets of rubber rings and rubber ring pins can be arranged at the second roller and the fourth roller, and long and short rubber rings can be matched.
[0020] The elastic jaws formed at the front end of the rubber ring (the upper and lower pin jaws are the parts of the upper and lower pins holding the yarn) are close to the rollers, reducing the uncontrolled area and strengthening the control of floating fibers. One more set of rubber rings is used than the three rollers to increase the control effect. After adding the pressure bar and spacing block, the space of the drafting floating area is greatly reduced, which strengthens the control ability of the fiber and is conducive to improving the yarn dryness quality. It can further improve the spinning effect.
[0021] 4. Active traction of slivers, on the one hand to transport the slivers, on the other hand to increase pre-drafting, straightening the slivers before feeding them into the fifth roller, with better parallelism, which is conducive to drafting.
[0022] 5. The spinning frame using the five-roller drafting system shortens the process flow while the twisting and spinning principle of the obtained spinning is the same as that of the traditional ring spinning spinning. It has the advantages of ring spinning, which are generally reflected in the quality of the spinning, including yarn evenness, strength, hairiness, coarse and fine details, and cotton knots. According to the actual needs of the factory, the cotton storage device can be arranged on the same floor as the spinning frame equipment or on the upper floor.
[0023] 6. Applying the five-roller drafting system to the spinning frame can achieve better yarn quality for yarns of different counts and varieties under the optimal process parameter range. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 is a structural schematic diagram of the five-roller drafting system;
[0025] Figure 2 It is a schematic diagram showing that when a five-roller drafting system is installed on a spinning frame, the cotton storage device for storing slivers is arranged on the same floor as the spinning frame equipment and the dimensions are marked;
[0026] Figure 3This is a schematic diagram showing that when a five-roller drafting system is installed on a spinning frame, a cotton storage device for storing slivers is arranged on the upper floor of the floor where the equipment is located. DETAILED DESCRIPTION
[0027] The five-roller drafting system consists of five rollers of the same shape and size, which can achieve a drafting multiple that cannot be achieved by a general three-roller spinning frame. The slivers generated by the drawing frame can be directly fed into the five-roller drafting system, and after high-multiple drafting and twisting, the spun yarn can be directly obtained.
[0028] During the drafting process, the condenser is designed according to the width and shape of the fiber strands after drafting. As the fiber strands are fed from the fifth roller and begin the drafting process, the fiber strands become thinner and thinner, and the overall size of the condenser becomes smaller and smaller. The shape of the condenser is designed to have a large inlet width and a small outlet width, which plays a role in gathering and tightening the fiber strands.
[0029] The cotton collector is arranged at least at the entrance of the second, third, fourth and fifth roller jaws, where the drafting roller and the upper rubber roller form the jaws, which are the contact area between the rubber roller and the roller, and the upper and lower pin jaws are the upper and lower pins holding the yarn. It can improve the control of the cotton sliver fibers and improve the yarn quality. The cotton collector is in the shape of a cone, which is used to constrain the cotton sliver through a shape similar to a trumpet.
[0030] Furthermore, the fifth cotton collector is in a trumpet shape, and the fourth, third, second and first cotton collectors have wide inlets and narrow outlets.
[0031] Two sets of rubber rings and rubber ring pins are arranged at the second roller and the fourth roller, and double short rubber rings or long and short rubber rings can be used. At the second roller, a pressure bar and a distance block are used.
[0032] The thickness of the gauge block adjusts the original gauge of the rubber ring jaws, including the pressure bar gauge block. The pressure bar gauge block applies pressure to the fiber strands to reduce the floating area (the metal roller is the pressure bar).
[0033] A cotton collector can be added at the jaws of the first roller and used in conjunction with a pressure bar and a spacing block.
[0034] The use of this drafting system requires active pulling of the slivers to feed the fifth roller. The pulling device has a 1.1 to 1.2 times drafting effect with the fifth roller to straighten the fibers. Figure 1 The guide rollers 8 shown are a pair of guide rollers that clamp and pull the cotton strips.
[0035] The spinning frame equipment using the five-roller drafting system adopts an active method to pull the cotton strips. The cotton storage device for storing the cotton strips can be arranged on the same floor of the factory building and the spinning frame equipment, or on the upper floor of the floor where the equipment is located as needed.
[0036] The five-roller drafting system is installed on the roller seat in the same way as the traditional three-roller drafting system, and is fixed to the frame through the roller seat. The center line of the five rollers is 45 degrees to the horizontal.
[0037] like Figure 1 , which is a schematic diagram of a five-roller drafting system of an embodiment, includes a first roller 11, a second roller 21, a third roller 31, a fourth roller 41, and a fifth roller 51. The rubber rollers that form a clamp with each roller include a first rubber roller 12, a second rubber roller 22, a third rubber roller 32, a fourth rubber roller 42, and a fifth rubber roller 52.
[0038] The following are the relevant parameters of the five-roller drafting system:
[0039] 1. Roller center distance (unit: mm)
[0040] The roller center distance is the center distance of each roller. Adjusting the center distance of each roller to the appropriate parameter has an important impact on the spinning quality.
[0041] One to two rollers D1 Two to three rollers D2 Three-four roller D3 Four-five roller D4 Parameter range 40～48 35～45 50～57 37～48 Test parameters 45 39 52 48
[0042] 2. Distance between rubber roller and roller (unit: mm)
[0043] If the rollers on the lower side are fixed, the upper rubber roller is in contact with the rollers, the line connecting the contact points is the axis of symmetry, and the center line connecting the rubber rollers and rollers on both sides is perpendicular to the line connecting the contact points. In order to increase the wrapping angle of the fiber strands on the rollers and rubber rollers, the upper rubber roller is installed in an offset manner. The offset distance and offset method are shown in the table below. The front offset is the offset toward the direction of the first roller, and the rear offset is the opposite.
[0044] First rubber roller d1 Second rubber roller d2 The third rubber roller d3 Fourth rubber roller d4 Fifth rubber roller d5 Parameter range Front bias 2~3 Back bias 0~1 Backward 2~3 Back bias 0~1 Backward 2~3 Test parameters 3 0.5 2 1 2
[0045] 3. Drafting multiple (multiple)
[0046] The drafting multiple here refers to the speed ratio between different rollers, which is achieved by motor and mechanical transmission. The roller speed gradually increases from the fifth roller to the first roller.
[0047] One to two rollers Two to three rollers Three to four rollers Four to five rollers Parameter range 13～30 1～2 3～8 1～3 Test parameters (21 pieces) 26 1.3 5 1.5 Test parameters (32 pieces) 26 1.3 6 1.5 Test parameters (16 pieces) 26 1.5 4 1.5
[0048] The roller speeds are in multiples, that is, the roller speeds are different, from slow to fast, so that the fiber strands are stretched while being transported, which is commonly known as drafting.
[0049] This five-roller drafting system has a higher drafting multiple than the ordinary three-roller drafting system, and a gentler drafting than the four-roller drafting system. Spinning equipment equipped with this drafting system can save the roving process link, and directly carry out the following processing steps after the cotton strips are drafted, such as twisting in the ring spinning frame method or twisting in the air jet vortex spinning method, and finally obtain qualified spun yarn.
[0050] In order to shrink the width of the yarn, reduce the loss of flying fibers and edge fibers, and make the yarn stretch in a tighter state, at least the second cotton collector 62, the third cotton collector 63, the fourth cotton collector 64 and the fifth cotton collector 65 are installed at the jaws of the second to fifth rollers. The size of each cotton collector depends on the width and state of the fiber bundle before feeding into the jaws.
[0051] The cotton collector can be a mechanical cotton collector that depends on the structural size, and the cotton strips are restrained through a channel similar to the shape of a bell mouth. An air cotton collector with negative pressure suction holes can also be used. If the suction holes are properly designed, a rotating flow field can be generated, which can not only gather the fiber bundles, but also make the fiber bundles have a certain twist, increase the restraint between the fibers, and improve the drafting stability.
[0052] A set of rubber rings 7 are installed at the second roller and the fourth roller respectively, and double short rubber rings or long short rubber rings can be used. The use of rubber rings is very common. Here, a set of rubber rings is added compared to the general drafting system, and the five-roller drafting system is matched to improve the system performance.
[0053] Furthermore, a first cotton collector 61 can be installed at the jaws of the first roller, and used in conjunction with a pressure bar gauge installed at the rubber ring of the second roller to better control the fiber bundle. The principle is: the main working principle of the pressure bar gauge is that when the whisker enters the drafting zone, that is, in the floating zone between the rubber ring jaws and the front roller, a pressure bar is added, and the arc-shaped edge of the pressure bar contacts the drafted whisker, adding an additional friction boundary in the floating zone, so that the friction boundary distribution of the fiber in the drafting zone is significantly enhanced, and the control of the fiber movement is strengthened, so that the speed change point distribution of the fiber can be concentrated and stably close to the front jaw, reducing the change in fiber displacement, which is beneficial to improving the uniformity of the whisker. The pressure bar gauge, rubber ring and rubber ring pin in this article are all prior art and will not be repeated.
[0054] When using the five-roller drafting system, the sliver drawing device 8 is required to actively draw the slivers, on the one hand to transport the slivers, and on the other hand to increase pre-stretching, so that the slivers are straightened before being fed into the fifth roller, with better parallelism, which is beneficial to the drafting effect.
[0055] like Figure 2 and 3As shown, when the drafting system is used on a spinning frame equipment, the cotton storage device 9 for storing cotton strips can be arranged on the same floor of the factory building and the spinning frame equipment, or on the upper floor of the floor where the equipment is located, depending on the factory layout or process requirements.
[0056] like Figure 2 The dimensions and other process parameters are described in the claims. They are the optimal parameter ranges for different spinning varieties obtained by testing the five-roller drafting system installed on the spinning frame, with relatively complete spinning test result data as support. The test proves that the five-roller spinning frame has good results in 21-s and 16-s yarns with a total draft of less than 150 times for carded cotton, and the yarn evenness and cotton knot indicators are close to the 5% level in the 2013 Uster Bulletin.
[0057] In addition, this system can be applied to other spinning equipment, a typical example being air jet vortex spinning equipment.
Claims
1. A five-roller drafting system, characterized in that: The invention comprises a first roller, a second roller, a third roller, a fourth roller and a fifth roller arranged in sequence, and the rollers are clamped by rubber rollers installed in an offset manner, including the first rubber roller, the second rubber roller, the third rubber roller, the fourth rubber roller and the fifth rubber roller. The cotton strip enters from the fifth roller and is transmitted from the first roller. The rotation speed of the five rollers gradually increases from the fifth roller to the first roller. It also includes a traction device, wherein the traction device uses a guide roller, a pair of guide rollers clamp and pull the cotton strip and the fifth roller to have a drafting effect of 1.1 to 1.2 times, which is used to straighten the fiber; The five-roller drafting system is installed on a roller seat, fixed to the frame through the roller seat, and the center line of the five rollers is 45 degrees to the horizontal; The roller center distance between the first roller and the second roller is 40mm-48mm, the roller center distance between the second roller and the third roller is 35mm-45mm, the roller center distance between the third roller and the fourth roller is 50mm-57mm, and the roller center distance between the fourth roller and the fifth roller is 37mm-48mm; The offset of the roller and the corresponding rubber roller is divided into two directions: forward offset and backward offset. The forward offset is offset toward the first roller, and the backward offset is opposite. The first rubber roller is forward offset, and the second, third, fourth and fifth rubber rollers are backward offset; wherein, the offset distance between the first roller and the first rubber roller is 2mm to 3mm, the offset distance between the second roller and the second rubber roller is greater than 0mm and less than or equal to 1mm, the offset distance between the third roller and the third rubber roller is 2mm to 3mm, the offset distance between the fourth roller and the fourth rubber roller is greater than 0mm and less than or equal to 1mm, and the offset distance between the fifth roller and the fifth rubber roller is 2mm to 3mm; The speed ratio of the fifth roller to the fourth roller is 1 to 3, the speed ratio of the fourth roller to the third roller is 3 to 8, the speed ratio of the third roller to the second roller is 1 to 2, and the speed ratio of the second roller to the first roller is 13 to 30; The first cotton collector, the second cotton collector, the third cotton collector, the fourth cotton collector and the fifth cotton collector are installed at the jaws of the first to fifth rollers, and the sizes of the cotton collectors decrease in sequence from the fifth cotton collector, the fourth cotton collector, the third cotton collector, the second cotton collector to the first cotton collector. The cotton collectors are air cotton collectors with negative pressure suction holes, which generate a rotating flow field to apply twist to the cotton strips. Two sets of rubber rings and rubber ring pins are arranged at the second roller and the fourth roller; At the second roller, a pressure bar and a spacing block are used.
2. The five-roller drafting system according to claim 1, characterized in that: The center distance between the first roller and the second roller is 45 mm, the center distance between the second roller and the third roller is 39 mm, the center distance between the third roller and the fourth roller is 52 mm, and the center distance between the fourth roller and the fifth roller is 48 mm.
3. The five-roller drafting system according to claim 1, characterized in that: The offset distance between the first roller and the first rubber roller is 3mm, the offset distance between the second roller and the second rubber roller is 0.5mm, the offset distance between the third roller and the third rubber roller is 2mm, the offset distance between the fourth roller and the fourth rubber roller is 1mm, and the offset distance between the fifth roller and the fifth rubber roller is 2mm.
4. A ring spinning frame using the five-roller drafting system according to any one of claims 1 to 3, characterized in that: The ring spinning frame is equipped with a five-roller drafting system, and a cotton storage device for storing cotton strips of the ring spinning frame is arranged on the upper floor or the same floor as the floor where the ring spinning frame equipment is located.