Yarn guide device for improving fineness uniformity of coarse denier spandex yarn
By increasing the diameter of the guide roller and adding auxiliary inclined rollers and wire guides, the problem of poor uniformity of the thick denier spandex wire is solved, and more uniform fineness and more stable tow operation are achieved.
Patent Information
- Application Number
- CN202421802327.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-29
AI Technical Summary
During the wire guide process, the diameter of the guide roller is too small and the contact area is insufficient, resulting in poor uniformity of the fineness, extremely poor fineness and wave-shaped bending of the tow appearance.
By increasing the diameter of the guide roller to more than 1.5 times, and increasing the auxiliary inclined roller and auxiliary wire guide, the contact area between the spandex wire and the wire guide is increased so that the spandex wire does not overlap and wind the wire between the guide rollers.
The fineness uniformity of the thick denier spandex wire is significantly improved, the extremely poor fineness is reduced, and the straightness and appearance quality of the tow are improved.
Smart Images
Figure CN222878182U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of spandex fiber production devices, and in particular relates to a wire guiding device for improving the uniformity of coarse-denier spandex yarn fineness. Background Art
[0002] Spandex is a textile fiber with excellent elastic elongation and elastic recovery. Due to its downstream application characteristics, spandex is always spun into filaments. Adding a small amount of spandex to textiles can significantly improve the elasticity, feel and comfort of the product, so it is increasingly used. Spandex has a wide range of specifications, from 7D to 3000D, and has its corresponding application fields. Among them, spandex coarse denier yarns with specifications above 210D are mainly used in webbing, elastic bands, medical bandages, diapers and other fields.
[0003] As a chemical fiber product with extremely low elastic modulus, spandex usually has an elastic modulus of only 0.1cn / dtex. It is very easy to have problems with uniformity of fineness due to slight speed or tension fluctuations during processing. Especially in the winding stage, the yarn is driven and stretched by the high-speed rotating godet roller. The yarn is always in a sliding friction state on the godet roller. Therefore, the actual running speed of the yarn is easily affected by the instantaneous friction change between the yarn and the godet roller, resulting in uneven fineness.
[0004] This problem is more prominent in coarse denier yarns, especially coarse denier spandex yarns with specifications above 210D. This is related to the smaller relative contact area between the yarn and the guide roller (contact area per unit fineness), and the yarn sliding on the guide roller is more obvious, resulting in poor fineness uniformity of the spandex yarn. Usually, the fineness range of coarse denier spandex yarns with specifications above 210D within 200m can reach more than 60D, or even more than 100D, and the appearance of the yarn bundle is wavy and curved. Excessive fineness deviation greatly reduces the uniformity of the subsequent elastic fabric, which is often manifested as bending of fabric stripes or ribbons, which is prone to customer complaints and even claims. Therefore, improving the fineness uniformity of coarse denier yarns is an urgent and practical need. Utility Model Content
[0005] To solve the above problems, the utility model improves the existing wire guiding device, increases the diameter of the wire guiding roller, adds auxiliary inclined rollers and auxiliary wire guides, increases the contact area between the spandex yarn and the wire guide, and thus improves the uniformity of the spandex yarn fineness.
[0006] Fineness(N d ), which indicates the weight (g) of 9000m of textile material at the standard moisture regain, and is widely used in the fineness of silk and chemical fiber filaments. The fineness is fixed length. If the denier of the same fiber is larger, the fiber is thicker.
[0007] The specific scheme of the utility model is as follows:
[0008] A wire guiding device for improving the uniformity of the fineness of coarse denier spandex yarns comprises a first wire guiding roller, a second wire guiding roller, a third wire guiding roller, a first wire guide, a second wire guide and an oil roller, and is characterized in that it also comprises an auxiliary oblique roller and an auxiliary wire guide, wherein the auxiliary oblique roller is arranged below the second wire guiding roller and the third wire guiding roller.
[0009] In the utility model, the denier of the coarse denier spandex yarn is 210D-3000D, preferably 560D-1120D.
[0010] Hereinafter, the first godet roller, the second godet roller, the third godet roller and the auxiliary oblique roller may be collectively referred to as godet rollers.
[0011] The wire guide device in the existing thick denier spandex yarn production process includes three wire guide rollers, namely the first wire guide roller, the second wire guide roller, and the third wire guide roller, and the diameter range of the wire guide roller is 80-150mm. The second wire guide roller and the third wire guide roller are arranged in the same horizontal position in sequence, and the first wire guide roller is arranged at the lower left of the second wire guide roller (that is, directly below the spinning tunnel). An oil roller and a first wire guide are arranged between the first wire guide roller and the second wire guide roller.
[0012] In order to increase the contact area between the spandex yarn and the godet roller, the utility model increases the diameter of the godet roller to more than 1.5 times the diameter of the existing godet roller, that is, increases the range of the godet roller diameter R to 150mm<R≤250mm, preferably 180-220mm, thereby improving the uniformity of the fineness of the coarse denier spandex yarn. If the diameter of the godet roller is too small, the purpose of improving the uniformity of the fineness of the spandex yarn cannot be achieved; if the diameter of the godet roller is too large, it is inconvenient to arrange the equipment and increase the cost.
[0013] Furthermore, the number of auxiliary skew rollers M≥1. The solution of the utility model does not specifically limit the number of auxiliary skew rollers, and the number of auxiliary skew rollers can be one, two or three, etc., all within the scope of protection of the utility model.
[0014] Furthermore, the auxiliary oblique roller has the same diameter as the first guide roller, the second guide roller, and the third guide roller.
[0015] Furthermore, the auxiliary slanted roller is arranged at a higher level than the first guide roller and below the second guide roller and the third guide roller. If the auxiliary slanted roller is located lower than the first guide roller, it is too close to the winding device, which is inconvenient for workers to operate the yarn.
[0016] Furthermore, the inclination angle of the auxiliary inclined roller relative to the second wire guide roller and the third wire guide roller is close to or inclined downward therefrom.
[0017] In the existing production process of coarse denier spandex yarn, the spandex yarn passes through the second and third guide rollers and then enters the winding device, and does not coil on the guide rollers. When not coiling, the running speed of the coarse denier spandex yarn cannot be guaranteed to be consistent with the surface linear speed of the guide roller. The spandex yarn is always in a dynamic sliding state on the guide roller, and the running speed is unstable. In order to improve the uniformity of the fineness of the coarse denier spandex yarn, the utility model requires the coarse denier spandex yarn coming out of the spinning tunnel to be coiled on the second guide roller, the third guide roller and the auxiliary oblique roller without overlapping when passing through the guide device.
[0018] Furthermore, the spandex yarn is wound 2-10 times without overlapping between the second godet roller and the auxiliary oblique roller, or the spandex yarn is wound 2-10 times without overlapping between the third godet roller and the auxiliary oblique roller, preferably 5-7 times. If the number of winding turns is too small, the spandex yarn still slips on the godet roller, and the uniformity of the spandex yarn fineness cannot be improved; if the number of winding turns is too large, it will cause inconvenience in the spinning operation.
[0019] The spandex yarns with different numbers of turns are separated by auxiliary wire guides. When the spandex yarn is wound between the second wire guide roller or the third wire guide roller and the auxiliary diagonal roller, an auxiliary wire guide is added; when the spandex yarn is wound between the second wire guide roller, the third wire guide roller and the auxiliary diagonal roller, two auxiliary wire guides are added. If the auxiliary wire guide is not used, the spandex yarn will slide back and forth laterally on the wire guide roller (vertical to the direction of the wire path, sliding laterally along the surface of the wire guide roller), causing the wire paths of adjacent turns of spandex yarn bundles to overlap, resulting in uneven fineness or broken yarns.
[0020] Furthermore, the speeds of the first guide roller, the second guide roller, the third guide roller and the auxiliary oblique roller are different. Among them, the speed of the first guide roller is the lowest, and the speed of the auxiliary oblique roller and the guide roller that is coiled together with it should be consistent. In the actual production process, the spinning speed of the coarse denier spandex yarn is 350-800m / min, and the speed of the guide roller should be appropriately lower than the spinning speed to ensure the stability of the yarn tension between the guide roller and the winding head. Among them, the speed of the first guide roller is the lowest, which is about 0.75-0.9 times the spinning speed. The speed of the second guide roller and the third guide roller should be appropriately higher than the speed of the first guide roller to ensure the stable drafting and running tension stability of the yarn between the guide rollers. The speed of the auxiliary oblique roller and the guide roller that is coiled together with it (that is, the second guide roller or the third guide roller) should be consistent. This is the key to ensure that the yarn speed at the coil is consistent with the speed of the guide roller, so that the friction between the yarn and the auxiliary oblique roller here is converted into static friction, thereby improving the stability of the yarn running speed.
[0021] Furthermore, the speeds of the first godet roller, the second godet roller, the third godet roller and the auxiliary oblique roller are 300-800 m / min.
[0022] Furthermore, the angle between the auxiliary oblique roller and the second guide roller or the third guide roller is 0<A<10°, preferably 0.5<A<1.5°. The angle is the angle formed by the auxiliary oblique roller and the extended axis of the second guide roller or the third guide roller. The size of the angle is related to the uniformity of the spandex fineness. If the angle is too small, it is easy to cause the wire paths of the adjacent coils of the same cake on the guide roller to overlap, resulting in uneven spandex fineness; if the angle is too large, the wire bundles on the guide roller are too dispersed, which will also cause the wire paths of two adjacent cakes to overlap, also resulting in uneven spandex fineness or broken wires.
[0023] Furthermore, the inclination angle of the auxiliary slanted roller relative to the second wire guide roller is close to the second wire guide roller or inclined downwardly from the second wire guide roller; similarly, the inclination angle of the auxiliary slanted roller relative to the third wire guide roller is close to the third wire guide roller or inclined downwardly from the third wire guide roller. Relative to the wire guide roller around which it is wound, the non-fixed end of the auxiliary slanted roller should be inclined inwardly or downwardly, which facilitates the spinning operation and improves the winding stability.
[0024] Beneficial effects:
[0025] The utility model provides a wire guide device for improving the uniformity of the fineness of thick denier spandex yarns. The uniformity of the fineness of thick denier spandex yarns is closely related to the uniformity of the friction between the spandex yarns and the wire guide rollers, and the uniformity of the friction between the spandex yarns and the wire guide rollers is closely related to the stability of the elastic modulus of the spandex yarns themselves, the stability of the cross-sectional shape of the spandex yarns, the stability of the contact area between the spandex yarns and the wire guide rollers, the machining accuracy of the guide roller surface, and the state of the guide roller surface being wetted by an oil agent.
[0026] In order to improve the uniformity of the fineness of the coarse denier spandex yarn, the utility model needs to increase the contact area between the spandex yarn and the wire guide roller. For this purpose, the wire guide device is improved, an auxiliary inclined roller and an auxiliary wire guide are added, the spandex yarn is wound between the second wire guide roller or the third wire guide roller and the auxiliary inclined roller for a certain number of turns, and the auxiliary wire guide is used to isolate the spandex yarn from the second wire guide roller and the auxiliary wire guide, so that the spandex yarn can be wound around the wire guide rollers without overlapping. This design significantly increases the contact area between the spandex yarn and the wire guide roller. In addition, the advantage of this solution is that there is no need to change the structure and position of the existing first wire guide roller, the second wire guide roller, the third wire guide roller and the oil roller, which conforms to the existing head production operation habits and is convenient for workers to operate; at the same time, the range of the diameter R of the wire guide roller is increased to 150mm<R≤250mm, which is more than 1.5 times the diameter of the existing wire guide roller, thereby further increasing the contact area between the spandex yarn and the wire guide roller. Increasing the contact area can improve the speed stability of the yarn bundle on the guide roller (the ideal state is that the contact area between the yarn and the guide roller is large enough, the linear speed of the yarn and the guide roller is consistent, and the sliding friction is changed to static friction), which will also improve the speed stability of the yarn bundle in the drawing and winding sections in the channel, thereby improving the uniformity of the coarse denier spandex yarn fineness. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] FIG1 is an embodiment of the wire guide device of the utility model: 1a is a schematic diagram of the structure of the wire guide device, and 1b is a schematic diagram of the wire path of the coarse denier spandex yarn wound on the wire guide roller;
[0028] FIG2 is a second embodiment of the wire guiding device of the utility model: FIG2a is a schematic diagram of the structure of the wire guiding device, and FIG2b is a schematic diagram of the wire path of the coarse denier spandex yarn wound on the wire guiding roller;
[0029] FIG3 is a third embodiment of the wire guide device of the utility model: 3a is a schematic diagram of the structure of the wire guide device, and 3b is a schematic diagram of the wire path of the coarse denier spandex yarn wound on the wire guide roller;
[0030] Fig. 4 is an implementation of the wire guiding device in the prior art: 4a is a schematic diagram of the structure of the wire guiding device, and 4b is a schematic diagram of the wire path of the coarse denier spandex yarn on the wire guiding roller.
[0031] Description of reference numerals:
[0032] 1.1 Spinning tunnel; 1.2 False twister; 1.3 First godet roller; 1.4 Second godet roller; 1.5 Third godet roller;
[0033] 1.6 first wire guide; 1.7 oil roller; 1.8 auxiliary inclined roller; 1.9 auxiliary wire guide a; 2.9 auxiliary wire guide b;
[0034] 1.10 Second yarn guide; 1.11 Winding device; 1.12 Spandex yarn. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be further clearly and completely described in the text in combination with the drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. For the sake of clarity and conciseness, not all features of the actual implementation are described in the specification. However, it should be understood that many implementation-specific decisions must be made in the process of developing any such actual embodiment in order to achieve the specific goals of the developer. It should also be noted that the elements and features described in a figure or an embodiment of the utility model can be combined with the elements and features shown in one or more other figures or embodiments. In order to avoid blurring the utility model due to unnecessary details, only the device structure closely related to the scheme according to the utility model is described in the drawings and descriptions. In order to more clearly show the structure of the device described in the utility model, some structures are omitted in the drawings to highlight the characteristic structure of the important parts.
[0036] Hereinafter, the solution of the utility model is described through specific implementation methods.
[0037] Example 1
[0038] The present embodiment discloses a wire guide device for improving the uniformity of the fineness of thick denier spandex yarn. As shown in FIG1 , the wire guide device includes a first wire guide roller 1.3, a second wire guide roller 1.4, a first wire guide 1.6, an oil roller 1.7, a third wire guide roller 1.5, an auxiliary oblique roller 1.8, an auxiliary wire guide 1.9 and a second wire guide 1.10. The diameters of the first wire guide roller 1.3, the second wire guide roller 1.4, the third wire guide roller 1.5 and the auxiliary oblique roller 1.8 are the same, all of which are 200 mm. Among them, the first wire guide 1.6 and the oil roller 1.7 are arranged between the first wire guide roller 1.3 and the second wire guide roller 1.4. The second wire guide roller 1.4 and the third wire guide roller 1.5 are arranged in sequence at the same horizontal position, and the first wire guide roller 1.3 is arranged at the lower left of the second wire guide roller 1.4 (i.e., directly below the spinning tunnel 1.1). The auxiliary inclined roller 1.8 is arranged below the second godet roller 1.4 and the third godet roller 1.5 and is higher than the level of the first godet roller 1.3. A spinning shaft comprises 4 cakes of yarn, such as Figure 1b As shown, the spandex yarn 1.12 is wound between the auxiliary oblique roller 1.8 and the third wire guide roller 1.5 without overlapping, and is wound for 6 turns. The auxiliary oblique roller 1.8 is inclined toward the third wire guide roller 1.5, and the angle A formed by extending along the axis direction of the auxiliary oblique roller 1.8 and the third wire guide roller 1.5 is 1.5°. The auxiliary wire guide 1.9 is arranged between the third wire guide roller 1.5 and the auxiliary oblique roller 1.8. The second wire guide 1.10 is arranged between the third wire guide roller 1.5 and the winding device 1.11 below.
[0039] The winding speed of the winding device 1.11 is 550 m / min, and the speeds of the first guide roller 1.3, the second guide roller 1.4, the third guide roller 1.5 and the auxiliary inclined roller 1.8 are 470 m / min, 480 m / min, 490 m / min, and 490 m / min, respectively.
[0040] Example 2
[0041] This embodiment discloses another wire guide device for improving the uniformity of the fineness of thick denier spandex yarns. As shown in FIG2, compared with Example 1, the spandex yarn 1.12 is wound between the auxiliary oblique roller 1.8 and the second wire guide roller 1.4 without overlapping, winding 6 turns, the auxiliary oblique roller 1.8 is inclined toward the second wire guide roller 1.4, and the angle A formed by extending along the axis direction of the auxiliary oblique roller 1.8 and the second wire guide roller 1.4 is 1.5°. The auxiliary wire guide 1.9 is arranged between the second wire guide roller 1.4 and the auxiliary oblique roller 1.8.
[0042] The winding speed of the winding device 1.11 is 550 m / min, and the speeds of the first guide roller 1.3, the second guide roller 1.4, the third guide roller 1.5 and the auxiliary inclined roller 1.8 are 470 m / min, 480 m / min, 490 m / min and 480 m / min respectively.
[0043] Other conditions are consistent with those in Example 1.
[0044] Example 3
[0045] The present embodiment discloses another wire guiding device for improving the uniformity of the fineness of coarse denier spandex yarn. As shown in FIG3 , the coarse denier spandex yarn 1.12 is wound 6 times without overlapping between the second wire guide roller 1.4, the third wire guide roller 1.5 and the auxiliary diagonal roller 1.8, and an auxiliary wire guide 2.9 is added between the second wire guide roller 1.4 and the auxiliary diagonal roller 1.8.
[0046] The winding speed of the winding device 1.11 is 550m / min, and the speeds of the first guide roller 1.3, the second guide roller 1.4, the third guide roller 1.5 and the auxiliary inclined roller 1.8 are 470m / min, 490m / min, 490m / min, 490m / min, respectively.
[0047] Other conditions are consistent with those in Example 1.
[0048] Compared with the existing wire guiding device, the wire guiding device shown in Figures 1, 2 and 3 not only improves the uniformity of the fineness of the final product spandex yarn, but also does not require changes to the structure and position of the first wire guiding roller 1.3, the second wire guiding roller 1.4, the third wire guiding roller 1.5 and the oil roller 1.7, which conforms to the existing yarn production operation habits and is convenient for workers to operate.
[0049] Example 4
[0050] This embodiment uses the wire guide device shown in Figure 1, the auxiliary inclined roller 1.8 is inclined toward the third wire guide roller 1.5, and the angle A formed by extending along the axis direction of the auxiliary inclined roller 1.8 and the third wire guide roller 1.5 is 0.7°. Other conditions are consistent with those in Example 1.
[0051] Comparative Example 1
[0052] This comparative example uses the wire guide device shown in Figure 4, and the coarse denier spandex yarn 1.12 passes through the first wire guide roller 1.3, the second wire guide roller 1.4 and the third wire guide roller 1.5 in sequence, and then enters the winding device 1.11 for winding. The diameters of the first wire guide roller 1.3, the second wire guide roller 1.4 and the third wire guide roller 1.5 are 100 mm, and the speeds of the first wire guide roller 1.3, the second wire guide roller 1.4 and the third wire guide roller 1.5 are 470 m / min, 480 m / min and 490 m / min, respectively, and the winding speed of the winding device 1.11 is 550 m / min. Figure 4b As shown, the spandex yarn 1.12 is not wound between the godet rollers.
[0053] The diameter of the godet roller, the number of winding turns, the angle, the godet roller speed, and the winding speed in Examples 1-4 and Comparative Example 1 are shown in Table 1:
[0054]
[0055]
[0056] With reference to the standard "Test Method for Spandex Yarn Line Density FZ / T50005-2013", the spandex yarns of Examples 1-3 and the comparative example were tested:
[0057] (1) Laboratory temperature and humidity conditions:
[0058] Temperature: 20±2℃
[0059] Humidity: 65±2%
[0060] Humidity adjustment time: 24h
[0061] (2) Test principle
[0062] Under standard laboratory atmospheric conditions, a 10m long fiber is wound up using a yarn winder, the fiber mass is measured, and the fineness is calculated and expressed in denier (D). One yarn cake is measured 20 times in a row, and the fineness range and CV value of the 20 measurements are used to indicate the fineness uniformity of the coarse denier spandex yarn.
[0063] (3) Instruments and tools
[0064] Silk yarn instrument, balance
[0065] (4) Calculation of results
[0066] T=M / L*9000
[0067] T: Fineness (D)
[0068] M: Sample mass (g)
[0069] L: fiber test length (m)
[0070] Fineness CV value (coefficient of variation) = (σ / μ) × 100%. σ represents standard deviation, μ represents average value 20 times fineness range (R) = max(Ti)-min(Ti); i represents sample number, from 1 to 20. The test results are shown in the following table:
[0071] Example Density (D) 20th fineness range R(D) Fineness CV value (%) Wire straightness Example 1 853 31 1.1 straight Example 2 858 33 1.2 straight Example 3 852 33 1.2 straight Example 4 852 45 1.6 Slightly curved Comparative Example 1 856 71 2.3 Severe bending
[0072] By comparing Examples 1-4 with Comparative Example 1, it can be seen that adding auxiliary oblique rollers, increasing the diameter of the guide roller, and using the method of non-overlapping winding can significantly improve the uniformity of the fineness and the straightness of the coarse denier spandex yarn.
[0073] By comparing Example 4 with Example 1, it can be seen that the size of the angle A between the auxiliary oblique roller and the godet roller also affects the uniformity of the fineness of the coarse denier spandex yarn. The uniformity and straightness of the spandex yarn corresponding to the angle of 1.5° are better than those corresponding to the angle of 0.7°. Properly increasing the angle can reduce the overlap of the yarn paths of the adjacent coils of the same cake yarn on the godet roller, and improve the uniformity of the spandex yarn fineness.
[0074] It can be seen from the test results of the above embodiments that the contact length between the thick denier spandex yarn and the guide roller can be increased by using the present guide wire device, thereby improving the uniformity of the fineness of the thick denier spandex yarn.
Claims
1. A wire guide device for improving the uniformity of the fineness of thick denier spandex yarn, comprising a first wire guide roller, a second wire guide roller, a third wire guide roller, a first wire guide, a second wire guide and an oil roller, characterized in that: It also includes an auxiliary oblique roller and an auxiliary wire guide, wherein the auxiliary oblique roller is arranged below the second wire guide roller and the third wire guide roller.
2. A wire guiding device for improving the uniformity of the fineness of thick denier spandex yarn according to claim 1, characterized in that: The number of the auxiliary skew rollers M is ≥1.
3. A wire guiding device for improving the uniformity of the fineness of thick denier spandex yarn according to claim 1, characterized in that: The auxiliary inclined roller is arranged at a horizontal position higher than the first guide roller.
4. A wire guiding device for improving the uniformity of the fineness of thick denier spandex yarn according to claim 1, characterized in that: The inclination angle of the auxiliary inclined roller relative to the second wire guide roller and the third wire guide roller is close to or inclined downward therefrom.
5. A wire guiding device for improving the uniformity of the fineness of thick denier spandex yarn according to claim 1, characterized in that: When the coarse denier spandex yarn is wound on the auxiliary oblique roller without overlapping, the spandex yarns with different numbers of turns are separated by the auxiliary yarn guide.
6. A wire guiding device for improving the uniformity of the fineness of thick-denier spandex yarn according to claim 1, characterized in that: The angle between the auxiliary inclined roller and the second godet roller or the third godet roller is 0<A<10°.