A weft yarn unwinding device with folding function and a shuttle for circular weaving machine

Abstract

The utility model relates to weft thread unwinding device technical field, especially a kind of weft thread unwinding device with folding function and shuttle for circular weaving machine, a kind of weft thread unwinding device with folding function, including shuttle arm and the roller, silk passing ring and tension adjusting mechanism being set on shuttle arm, the roller rotation is set on shuttle arm, the silk passing ring is fixedly installed on shuttle arm, the silk passing ring is located between the roller and tension adjusting mechanism;The tension adjusting mechanism includes the buffer piece articulated on shuttle arm, first through-hole for being used to weft thread to pass through is arranged on the buffer piece, spring is arranged between the buffer piece and shuttle arm, in use, the silk passing ring and tension adjusting mechanism are cooperated by the roller on shuttle arm, and the weft thread with relatively wide width is folded into three layers by one layer and the width becomes one third of original, while accurate sending into corresponding position, ensure cloth surface flat, improve product strength also reduce the loss of weft thread to minimum.

Description

Technical Field

[0001] This utility model relates to the technical field of weft unwinding devices, and in particular to a weft unwinding device with folding function and its shuttle for circular looms. Background Technology

[0002] A circular loom is a specialized industrial piece of equipment primarily used for weaving tubular woven fabrics, widely applied in the production of packaging products such as FIBCs (Flexible Intermediate Bulk Containers) and ton bags. To enhance the mechanical strength of these woven bags, the weft yarn typically employs a folded yarn structure. In conventional production processes, the preparation of folded yarn is completed during the preceding yarn drawing process: the raw yarn is folded using a specialized folding device, then heat-set in an oven, and finally wound into yarn bobbins (yarn bundles) by a winding machine. These yarn bobbins are then transported to the circular loom workshop, where they are unwound by an unwinding device for weaving.

[0003] However, this process has a significant problem: the folded yarn is prone to structural damage during winding and unwinding due to mechanical stress, friction and repeated bending, such as pilling, flattening or even breakage. This not only affects the surface quality of the fabric, but may also reduce the overall strength and durability of the final product.

[0004] Therefore, from the perspective of process optimization and quality control, the repeated winding and unwinding process of folded yarn in the intermediate stage has become a bottleneck restricting production efficiency and product performance. Utility Model Content

[0005] The technical problem to be solved by this utility model is: in order to solve the problem that the weft yarn is easily damaged and bent when folding yarn in the existing production process, a weft yarn unwinding device with folding function and its shuttle for circular loom are provided.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a weft unwinding device with folding function, including a shuttle arm and a roller, a thread guide ring and a tension adjustment mechanism disposed on the shuttle arm. The roller is rotatably disposed on the shuttle arm, and the thread guide ring is fixedly installed on the shuttle arm. The thread guide ring is located between the roller and the tension adjustment mechanism. The tension adjustment mechanism includes a buffer plate hinged to the shuttle arm, the buffer plate having a first through hole for the weft yarn to pass through, and a spring positioned between the buffer plate and the shuttle arm. Compared to existing technologies, this solution, through the cooperation of rollers on the shuttle arm, a yarn guide ring, and the tension adjustment mechanism, folds a wide weft yarn from one layer to three layers, reducing its width to one-third of its original size, while precisely feeding it into the appropriate position. This ensures a flat fabric surface, improves product strength, and minimizes weft yarn loss.

[0007] In some preferred embodiments, the roller is rotatably mounted on the shuttle arm via a mounting arm.

[0008] To facilitate weft folding while accurately feeding the weft yarn into the desired position on the product, in some preferred embodiments, the mounting arm is inclinedly mounted on the shuttle arm, with one side of the mounting arm forming an obtuse angle with the shuttle arm. The yarn guide ring and tension adjustment mechanism are located on one side of the mounting arm. This provides sufficient space for the weft yarn and facilitates its folding while accurately feeding it into the desired position on the product.

[0009] In some preferred embodiments, the roller is located at the end of the shuttle arm away from the shuttle.

[0010] In some preferred embodiments, the roller has a plurality of weight-reducing holes.

[0011] In some preferred embodiments, the weight-reducing holes are evenly distributed along the circumference.

[0012] To achieve the desired weft yarn feed, in some preferred embodiments, the weft yarn feed ring includes a support plate with a second through hole and a guide ring. The second through hole is located on one side of the guide ring. The second through hole ensures accurate feeding of the weft yarn to the desired position, and the guide ring ensures that the weft yarn accurately enters the second through hole.

[0013] To improve the wear resistance of the second via and reduce the maintenance cycle of the thread guide ring, in some preferred embodiments, the second via is a ceramic via. Ceramic vias have excellent wear resistance, ensuring the service life of the second via and reducing the maintenance cycle of the thread guide ring.

[0014] To facilitate the guidance of the weft yarn by the roller, in some preferred embodiments, a guide groove for guiding the weft yarn is provided on the outer circumferential surface of the roller, and the width of the opening of the guide groove is greater than the width of the bottom of the groove.

[0015] A shuttle for a circular loom is equipped with the aforementioned weft unwinding device with a folding function.

[0016] The beneficial effects of this utility model are as follows: When using the weft unwinding device with folding function and the shuttle for the circular loom, the wider weft yarn is folded from one layer to three layers and the width is reduced to one-third of the original through the cooperation of the roller on the shuttle arm, the yarn guide ring and the tension adjustment mechanism. At the same time, it is accurately fed into the corresponding position to ensure that the fabric surface is flat, improve the strength of the product and minimize the loss of weft yarn. This avoids the problems of easy damage and bending of weft yarn when folding yarn in the existing production process. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of this utility model; Figure 2 yes Figure 1 A magnified view of part A in the image; Figure 3 This is a front view of Embodiment 1 of this utility model; Figure 4 This is a left view of Embodiment 1 of this utility model; Figure 5 This is a top view of Embodiment 1 of this utility model; Figure 6 This is a three-dimensional structural schematic diagram of Embodiment 2 of this utility model.

[0019] In the diagram: 1. Shuttle arm, 2. Roller, 3. Guide ring, 4. Tension adjustment mechanism, 401. Buffer plate, 402. First through hole, 5. Weight reduction hole, 6. Support plate, 7. Second through hole, 8. Guide ring, 9. Shuttle. Detailed Implementation

[0020] Example 1, such as Figure 1-6 As shown, a weft unwinding device with folding function includes a shuttle arm 1, on which a roller 2, a thread guide ring 3 and a tension adjusting mechanism 4 are provided. The roller 2 is rotatably mounted on the shuttle arm 1, and the thread guide ring 3 is fixedly mounted on the shuttle arm 1. The thread guide ring 3 is located between the roller 2 and the tension adjusting mechanism 4. The tension adjustment mechanism 4 includes a buffer plate 401 hinged to the shuttle arm 1. The buffer plate 401 is provided with a first through hole 402 for the weft yarn to pass through. A spring is provided between the buffer plate 401 and the shuttle arm 1.

[0021] The roller 2 is rotatably mounted on the shuttle arm 1 via the mounting arm. The mounting arm is mounted on the shuttle arm 1 at an angle. The angle between one side of the mounting arm and the shuttle arm 1 is an obtuse angle. The thread guide ring 3 and the tension adjustment mechanism 4 are located on one side of the mounting arm. The roller 2 is located at the end of the shuttle arm 1 away from the shuttle. The roller 2 has six weight reduction holes 5, which are evenly distributed along the circumference.

[0022] The wire guide ring 3 includes a support plate 6, on which a second through hole 7 and a wire guide ring 8 are provided. The second through hole 7 is located on one side of the wire guide ring 8 and is a ceramic hole. In this embodiment, the support plate 6 and the mounting arm are integrally formed.

[0023] The outer circumferential surface of the roller 2 is provided with a guide groove for guiding the weft thread, and the width of the opening of the guide groove is greater than the width of the bottom of the groove.

[0024] Example 2 is an application of Example 1, specifically as follows: Figure 6 As shown, a shuttle for a circular loom includes a shuttle 9, on which the aforementioned weft unwinding device with folding function is installed.

[0025] Its working principle is as follows: the weft wire enters through the bobbin mounted on the shuttle 9, and passes through the guide ring 8 and the first through hole 402 in sequence. The first through hole 402 is fixed on the guide ring 401 and has a broken wire rebound alarm function. Then, when the weft wire passes through the second through hole 7, it changes from a flat shape to an arc shape. The weft wire then passes through the roller 2 with a U-shaped guide groove. At this time, the weft wire turns 90 degrees and folds into three layers in the U-shaped guide groove of the roller 2. As the machine rotates, the weft wires are stacked layer by layer, and the three-fold weft wire is shaped.

[0026] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A weft unwinding device with folding function, characterized in that: It includes a shuttle arm (1) and a roller (2), a thread guide ring (3) and a tension adjustment mechanism (4) disposed on the shuttle arm (1). The roller (2) is rotatably disposed on the shuttle arm (1), and the thread guide ring (3) is fixedly installed on the shuttle arm (1). The thread guide ring (3) is located between the roller (2) and the tension adjustment mechanism (4). The tension adjustment mechanism (4) includes a buffer plate (401) hinged to the shuttle arm (1), the buffer plate (401) having a first through hole (402) for the weft yarn to pass through, and a spring being provided between the buffer plate (401) and the shuttle arm (1).

2. The weft unwinding device with folding function according to claim 1, characterized in that: The roller (2) is rotatably mounted on the shuttle arm (1) via the mounting arm.

3. The weft unwinding device with folding function according to claim 2, characterized in that: The mounting arm is mounted obliquely on the shuttle arm (1), and the angle between one side of the mounting arm and the shuttle arm (1) is obtuse. The thread guide ring (3) and the tension adjustment mechanism (4) are located on one side of the mounting arm.

4. A weft unwinding device with folding function according to claim 1, 2, or 3, characterized in that: The roller (2) is located at the end of the shuttle arm (1) away from the shuttle.

5. The weft unwinding device with folding function according to claim 1, characterized in that: The roller (2) has several weight-reducing holes (5).

6. The weft unwinding device with folding function according to claim 5, characterized in that: Several of the aforementioned weight-reducing holes (5) are evenly distributed along the circumference.

7. The weft unwinding device with folding function according to claim 1, characterized in that: The wire guide ring (3) includes a support plate (6), on which a second through hole (7) and a wire guide ring (8) are provided. The second through hole (7) is located on one side of the wire guide ring (8).

8. The weft unwinding device with folding function according to claim 7, characterized in that: The second via (7) is a ceramic via.

9. The weft unwinding device with folding function according to claim 1, characterized in that: The outer circumferential surface of the roller (2) is provided with a guide groove for guiding the weft thread, and the width of the opening of the guide groove is greater than the width of the bottom of the groove.

10. A shuttle for a circular loom, characterized in that: It is equipped with a weft unwinding device with folding function as described in any one of claims 1-8.

Images