A multi-stage drafting arrangement for siro compact spun knitting yarn

Abstract

The utility model relates to textile machinery technical field, concretely is a kind of race close spinning knitting yarn's multistage draft structure device, including draft support, draft support is successively equipped with front roller assembly, middle roller assembly and rear roller assembly along the fibre running direction, the middle roller assembly is by the upper and lower superposed driving roller and driven roller, and both are connected by elastic connecting piece movably, the front roller assembly upper side is equipped with the pressure roller of liftable, and fibre guide plate is equipped between the middle roller assembly and front roller assembly, fibre guide plate surface is equipped with multiple flow guide groove. The race close spinning knitting yarn's multistage draft structure device improves the stability and control precision of fibre bundle in the process of drafting, effectively reduces the fibre deviation and uneven drafting phenomenon, to improve the evenness of yarn evenness and overall quality stability.

Description

Technical Field

[0001] This utility model relates to the field of textile machinery technology, specifically a multi-segment drafting structure device for Siro compact knitting yarn. Background Technology

[0002] In modern textile industry, Siro compact spinning technology is widely used in the production of high-grade yarns due to its advantages such as significantly improving yarn structure, increasing yarn strength, and reducing hairiness. The drafting system, as a core component of spinning equipment, directly affects the stretching and separation of fibers, thus influencing the quality of the final yarn.

[0003] Currently, most Siro compact spinning knitting equipment uses a multi-stage drafting structure composed of multiple rollers. By setting multiple drafting sections, the fibers are gradually stretched at different stages. However, the existing roller structures are mostly fixed, and their surface structure, pressure method, and fiber guiding path are relatively simple, making it difficult to meet the high-precision fiber control requirements of the Siro compact spinning process. Especially when processing fine yarns for knitting, due to the fineness and high fluidity of the fiber bundles, problems such as fiber deviation, uneven drafting, and yarn evenness are prone to occur, affecting the consistency and stability of the final yarn quality. Utility Model Content

[0004] The purpose of this invention is to provide a multi-segment drafting structure device for Siro compact knitting yarn, in order to solve the problems mentioned in the background art, such as the single roller structure and insufficient fiber control precision of the current Siro compact knitting equipment, which easily leads to fiber deviation, uneven drafting and yarn evenness fluctuation when processing fine knitting yarn.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-segment drafting structure device for Siro compact knitting yarn, comprising a drafting support, on which a front roller assembly, a middle roller assembly, and a rear roller assembly are sequentially installed along the fiber running direction. The middle roller assembly consists of an upper and lower stacked active roller and a driven roller, which are movably connected by an elastic connector. A liftable pressure roller is provided above the front roller assembly, and the pressure roller is installed on the support beam. The inner end of the support beam is installed on a hydraulic drive block. A fiber guide plate is provided between the middle roller assembly and the front roller assembly, and the surface of the fiber guide plate is provided with multiple guide grooves.

[0006] Preferably, the front roller assembly includes a main drive shaft and two rubber rollers fitted on its exterior, the outer surfaces of which are provided with a micro-textured structure.

[0007] Preferably, the bottom of the driven roller of the middle roller assembly is guided and engaged with the drafting bracket via a guide rail mechanism.

[0008] Preferably, the pressure roller is provided with bearing seats at both ends, and the bearing seats are guided and engaged with the crossbeam through the corresponding connection of the guide post, and a buffer spring is sleeved on the outside of the connection end between the guide post and the bearing seat.

[0009] Preferably, one side of the inner end of the fiber guide plate is connected to the drawing bracket via a rotating shaft, and the other side of the inner end of the fiber guide plate is provided with an adjusting column that passes through the drawing bracket, and a positioning block is provided at the point where the adjusting column passes through the drawing bracket.

[0010] Preferably, the rear roller assembly includes two sets of parallel metal rollers, with a fiber positioning guide rod provided between the metal rollers.

[0011] Compared with existing technologies, the beneficial effects of this invention are as follows: This multi-segment drafting structure device for Siro compact knitting yarn improves the stability and control precision of the fiber bundle during the drafting process, effectively reducing fiber deviation and drafting unevenness, thereby improving yarn evenness and overall quality stability. The device achieves flexible clamping of the fiber bundle through the elastic connection design between the active and driven rollers in the middle roller assembly, enhancing the uniformity of force during drafting. Simultaneously, the fiber guide plate and its surface-mounted guide grooves effectively restrict the fiber flow path, preventing deviation before entering the main drafting zone. The cooperation between the support beam and the hydraulic drive block adjusts the working height of the pressure roller, making the drafting parameters more easily adaptable to the needs of different yarn specifications. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of a multi-segment drafting structure device for Siro compact knitting yarn according to the present invention.

[0013] Figure 2 This is a schematic diagram of a multi-segment drafting structure device for Siro compact knitting yarn according to the present invention.

[0014] Figure 3 This is a schematic diagram of a multi-segment drafting structure device for Siro compact knitting yarn according to the present invention.

[0015] In the diagram: 1. Drafting bracket; 2. Front roller assembly; 21. Main drive shaft; 22. Rubber roller; 3. Middle roller assembly; 31. Drive roller; 32. Driven roller; 33. Elastic connector; 34. Guide rail mechanism; 4. Rear roller assembly; 41. Metal roller; 42. Fiber positioning guide rod; 5. Pressure roller; 51. Bearing seat; 6. Bracket beam; 61. Guide column; 62. Buffer spring; 7. Fiber guide plate; 71. Guide groove; 72. Adjusting column; 73. Positioning block; 8. Hydraulic drive block. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3This utility model provides a technical solution: a multi-segment drafting structure device for Siro compact knitting yarn, including a drafting support 1. A front roller assembly 2, a middle roller assembly 3, and a rear roller assembly 4 are sequentially installed on the drafting support 1 along the fiber running direction. These three roller assemblies are arranged at an angle on the drafting support 1 to adapt to the process requirements of the fiber drafting path. The middle roller assembly 3 consists of an upper and lower stacked active roller 31 and a driven roller 32, which are movably connected by an elastic connector 33. A liftable pressure roller 5 is provided above the front roller assembly 2. The pressure roller 5 is installed on a support beam 6. The inner end of the support beam 6 is installed on a hydraulic drive block 8. The hydraulic drive block 8 is mounted on the drafting support 1 via a cylinder. The piston rod of the cylinder... The hydraulic drive block 8 is connected, and a fiber guide plate 7 is provided between the middle roller assembly 3 and the front roller assembly 2. The fiber guide plate 7 has multiple guide grooves 71 on its surface, which are evenly distributed in parallel and have a "V" shaped cross-section. This structure allows the fiber bundle to enter the front roller assembly 2 area after passing through the rear roller assembly 4 and the middle roller assembly 3 for preliminary drafting. During this process, the fiber guide plate 7, through the multiple guide grooves 71 on its surface, can effectively organize and limit the path of the fiber bundle about to enter the main drafting area, so that the fiber remains highly concentrated and evenly distributed before entering the front roller assembly 2, thereby preventing the deviation caused by the strong flow of the fiber. At the same time, the active roller 31 and the driven roller in the middle roller assembly 3... The flexible connector 33 enables a movable connection, creating a flexible clamping state during the drafting process. This ensures more uniform force distribution on the fiber bundle during traction, preventing displacement or excessive compression and further enhancing the stability of the drafting process. The inner end of the support beam 6 is mounted on the hydraulic drive block 8, allowing for dynamic adaptation to different process parameters by adjusting the height of the pressure roller 5. This ensures precise fiber control in the main drafting zone. Overall, this structure significantly improves the consistency and control precision of fiber operation during the drafting process, solving the yarn evenness fluctuation problem caused by fiber misalignment and uneven drafting in existing technologies. It enhances yarn evenness and overall quality stability, making it particularly suitable for the high-precision processing requirements of fine yarns used in Siro compact knitting. The front roller assembly 2 includes a main drive shaft 21 and two rubber rollers 22 mounted on its exterior. The outer surface of the rubber rollers 22 has a micro-textured structure. This structure allows the main drive shaft 21 to drive the two rubber rollers 22 to rotate synchronously. The micro-textured structure on its surface enhances the friction between the rubber rollers and the fiber bundle, making it less likely for the fibers to shift during drafting, thereby improving the uniformity and stability of drafting. In other words, the micro-textured structure can effectively increase the contact area and engagement ability between the rubber rollers 22 and the fibers, ensuring gentle clamping while avoiding damage to the fibers. This further improves the control accuracy and drafting consistency of the front roller assembly 2 for fine yarn fibers. The bottom of the driven roller 32 of the middle roller assembly 3 is guided and engaged with the drafting bracket 1 through a guide rail mechanism 34.This structure allows the driven roller 32 to move smoothly along a set trajectory on the drafting bracket 1 via the guide rail mechanism 34, thereby flexibly adjusting its relative position with the driving roller 31 according to process requirements. This ensures uniform force and continuous operation of the fiber bundle during drafting, effectively improving the adaptability and control precision of the drafting system and further guaranteeing the consistency of yarn quality. Bearing seats 51 are fixedly connected to both ends of the pressure roller 5, and the bearing seats 51 are guided and engaged with the corresponding connection points of the guide post 61 and the crossbeam 6. The guide post 61 movably passes through the crossbeam 6, and a buffer spring 62 is sleeved on the outside of the connection end between the guide post 61 and the bearing seat 51. This structure allows... The pressure roller 5 maintains a stable trajectory during lifting and lowering. Simultaneously, the buffer spring 62 fitted between the guide column 61 and the bearing seat 51 absorbs vibration and impact during pressurization, ensuring uniform pressure applied by the pressure roller 5 to the front roller assembly 2 with a certain elastic adjustment range. One side of the inner end of the fiber guide plate 7 is connected to the drafting bracket 1 via a rotating shaft, and the other side of the inner end of the fiber guide plate 7 is provided with an adjusting column 72 penetrating the drafting bracket 1. A positioning block 73 is provided at the penetration point between the adjusting column 72 and the drafting bracket 1. The drafting bracket 1 has an arc-shaped adjusting opening that matches the structure of the adjusting column 72. The outer edge of this adjusting opening is provided with... The positioning block 73 is structurally matched with an arc-shaped guide groove. The positioning block 73 has screw locking holes. When adjusting the tilt angle of the fiber guide plate 7, first loosen the screws on the positioning block 73 to disengage it from the limiting state of the arc-shaped guide groove. Then, the fiber guide plate 7 can be rotated around the pivot, causing the adjusting column 72 to move along the arc-shaped adjusting opening, thereby changing the included angle of the fiber guide plate 7's running direction. After adjusting to the appropriate angle, retighten the screws on the positioning block 73 to complete the precise positioning of the fiber guide plate 7. This achieves flexible adjustment and reliable locking of the fiber guide plate 7's angle, ensuring good guidance of the fiber bundle under different process conditions. The back roller assembly 4, including two sets of parallel metal rollers 41, effectively improves the stability of the drafting process and the quality of the yarn. A fiber positioning guide rod 42, made of cylindrical stainless steel with a polished surface, is positioned between the metal rollers 41. This structure ensures that the fiber bundle remains aligned before entering the middle roller assembly 3, preventing fiber entanglement or deviation from the path. This improves the stability and consistency of the fiber bundle entering the subsequent drafting zone. The high-precision positioning function of the fiber positioning guide rod 42 further enhances the control accuracy of the entire drafting system, contributing to improved final yarn quality and uniformity.

[0018] Working principle: When using the multi-stage drafting structure device for Siro compact knitting yarn, the fiber bundle is first fed into the rear roller assembly 4, where it is initially drafted by two sets of parallel metal rollers 41. Simultaneously, the fiber positioning guide rod 42 provides initial positioning and guidance for the fiber bundle. Subsequently, the fiber bundle enters the middle roller assembly 3 area, where the driving roller 31 and the driven roller 32 cooperate to complete the intermediate drafting stage. The driven roller 32 is positioned on the drafting support 1 via the guide rail mechanism 34. During this process, the fiber guide plate 7 is pre-positioned according to process requirements via the adjusting column 72 and the positioning... Block 73 sets the angle so that the fiber bundle is effectively organized and its running path is limited before entering the front drafting zone. Then the fiber bundle enters the front roller assembly 2 area. The main drive shaft 21 drives the two rubber rollers 22 with micro-concave texture structure to rotate, realizing the final drafting operation. At this time, the pressure roller 5 descends along the support beam 6 under the combined action of the hydraulic drive block 8 and the cylinder. Its two ends are guided and cooperated with the support beam 6 through the bearing seat 51 and the guide column 61, and the pressure is steadily transmitted to the top of the front roller assembly 2 by the buffer spring 62, thereby completing the entire drafting process and completing a series of tasks.

[0019] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-segment drafting structure device for Siro compact knitting yarn, comprising a drafting support (1), characterized in that: The drafting support (1) is sequentially equipped with a front roller assembly (2), a middle roller assembly (3), and a rear roller assembly (4) along the fiber running direction. The middle roller assembly (3) consists of an upper and lower stacked active roller (31) and a driven roller (32), which are movably connected by an elastic connector (33). A liftable pressure roller (5) is provided above the front roller assembly (2). The pressure roller (5) is installed on the support beam (6). The inner end of the support beam (6) is installed on a hydraulic drive block (8). A fiber guide plate (7) is provided between the middle roller assembly (3) and the front roller assembly (2). The surface of the fiber guide plate (7) is provided with multiple guide grooves (71).

2. The multi-segment drafting structure device for Siro compact knitting yarn according to claim 1, characterized in that: The front roller assembly (2) includes a main drive shaft (21) and two rubber rollers (22) fitted on its exterior. The outer surface of the rubber rollers (22) is provided with a micro-concave texture structure.

3. The multi-segment drafting structure device for Siro compact knitting yarn according to claim 1, characterized in that: The driven roller (32) of the middle roller assembly (3) is guided and engaged with the drafting bracket (1) through the guide rail mechanism (34).

4. The multi-segment drafting structure device for Siro compact knitting yarn according to claim 1, characterized in that: The pressure roller (5) is provided with bearing seats (51) at both ends, and the bearing seats (51) are guided and matched with the corresponding connection of the crossbeam (6) through the guide post (61), and a buffer spring (62) is sleeved on the outside of the connection end of the guide post (61) and the bearing seat (51).

5. The multi-segment drafting structure device for Siro compact knitting yarn according to claim 1, characterized in that: One side of the inner end of the fiber guide plate (7) is connected to the rotating shaft stretching bracket (1), and the other side of the inner end of the fiber guide plate (7) is provided with an adjusting column (72) that passes through the stretching bracket (1), and a positioning block (73) is provided at the point where the adjusting column (72) passes through the stretching bracket (1).

6. The multi-segment drafting structure device for Siro compact knitting yarn according to claim 1, characterized in that: The rear roller assembly (4) includes two sets of parallel metal rollers (41), with a fiber positioning guide rod (42) between the metal rollers (41).

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