Multi-axial warp knitting machine capable of knitting carbon fibers and glass fibers
By designing a fixed weft-laying assembly and a movable weft-laying execution structure on a multi-axial warp knitting machine, the problem that multi-axial warp knitting machines can only be used for single fiber materials has been solved, enabling efficient weaving of carbon fiber and glass fiber, improving equipment utilization and production flexibility, and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHANGZHOU WUJIN WUYANG TEXTILE MACHINERY CO LTD
- Filing Date
- 2026-03-18
- Publication Date
- 2026-05-12
AI Technical Summary
Existing multiaxial warp knitting machines can only be designed for single fiber materials, resulting in low equipment utilization, high production changeover costs, and difficulty in efficiently knitting two materials with very different properties, carbon fiber and glass fiber, on the same machine.
Design a multiaxial warp knitting machine that can weave both carbon fiber and glass fiber. It adopts a fixed first weft laying component and a movable weft laying execution structure, which are used for weaving different fiber yarns respectively. Through optimized design, damage to carbon fiber is avoided and the economy of glass fiber is guaranteed.
This enables high-quality weaving of carbon fiber and glass fiber on the same equipment, improving equipment utilization, reducing production costs, and creating production flexibility and equipment-sharing value for hybrid preforms.
Smart Images
Figure CN122013433A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of textile machinery and equipment manufacturing technology, and in particular to a multiaxial warp knitting machine that can weave both carbon fiber and glass fiber. Background Technology
[0002] Multiaxial warp knitting machines are key equipment for producing high-performance composite reinforced fabrics (multiaxial fabrics). Multiaxial fabrics are made of multiple layers of unidirectional fiber bundles (usually 2-7 layers) stacked in different directions (such as 0°, ±45°, 90°) and fixed by knitting yarn. They have advantages such as high layup efficiency, customizable mechanical properties, and good impact resistance, and are widely used in aerospace, wind turbine blades, rail transportation, sports equipment and other fields.
[0003] Currently, most multi-axial warp knitting machines on the market are designed for single-type fiber materials. For example, glass fiber multi-axial warp knitting machines use conventional weft-laying devices and are suitable for weaving glass fibers; carbon fiber multi-axial warp knitting machines use high-precision weft-laying devices and are suitable for weaving carbon fibers. While this dedicated machine approach can guarantee the weaving quality of specific materials, it also brings obvious limitations: low equipment utilization, high changeover costs, and the need for companies to configure multiple dedicated machines for different materials, increasing equipment investment and factory space requirements.
[0004] However, carbon fiber and glass fiber have fundamentally different physical properties: carbon fiber is characterized by high modulus, low elongation (approximately 1.5%), high brittleness, and easy surface damage, making it extremely sensitive to tension fluctuations, frictional contact, and bending radius during the weft-laying process; while glass fiber has better toughness and elongation, and is more tolerant of the weft-laying process. Therefore, conventional weft-laying equipment designed for glass fiber, with its passive tension control, small-radius yarn guide path, and conventional yarn clamping mechanism, is highly susceptible to causing fuzz, internal micro-cracks, or even breakage in carbon fiber if directly used for carbon fiber weaving, thus compromising product quality. Conversely, high-precision, low-friction, constant-tension-control weft-laying equipment designed for carbon fiber would result in wasted equipment costs and a mismatch in production capacity if used for glass fiber weaving.
[0005] With the continuous expansion of composite material applications, the market demand for multiaxial fabrics is becoming increasingly diversified. A single company often needs to produce fabric products of various materials and specifications. How to achieve specialized, high-quality weaving of carbon fiber and glass fiber—two materials with vastly different properties—on a single multiaxial warp knitting machine, while ensuring the precision requirements of carbon fiber weaving and taking into account the economic efficiency of glass fiber weaving, has become a pressing technical challenge in this field.
[0006] Therefore, in order to solve the above problems, a more suitable facility that meets the needs of users is needed. Summary of the Invention
[0007] In view of this, the purpose of this invention is to propose a multi-axial warp knitting machine that can be used to weave both carbon fiber and glass fiber, so as to solve the problem of how to achieve specialized and high-quality weaving of the two materials on a single machine.
[0008] To achieve the above objectives, the present invention provides a multi-axial warp knitting machine capable of weaving both carbon fiber and glass fiber, comprising a warp knitting machine main unit and further comprising: a first weft-laying assembly fixedly mounted on the frame of the warp knitting machine main unit for laying a first type of fiber yarn; and a second weft-laying assembly comprising a weft-laying execution structure and a driving structure, wherein the weft-laying execution structure is used to lay a second type of fiber yarn, and the driving structure is fixedly mounted on the frame of the warp knitting machine main unit for driving the weft-laying execution structure to move between a working position and a standby position; wherein, when weaving the first type of fiber yarn, the weft-laying execution structure is located in the standby position, and the first weft-laying assembly is located in the weft-laying area to lay weft; when weaving the second type of fiber yarn, the driving structure drives the weft-laying execution structure to move to the working position, the first weft-laying assembly remains fixed, and the weft-laying execution structure lays weft in the weft-laying area.
[0009] Optionally, the first type of fiber yarn is glass fiber, and the second type of fiber yarn is carbon fiber.
[0010] Optionally, the weft laying execution structure includes a side weft yarn frame slidably mounted on the main frame of the warp knitting machine, a left weft laying moving mechanism fixedly connected to the side weft yarn frame, an upper support seat, a weft pulling mechanism, a right support frame and a left support frame fixedly connected to the main frame of the warp knitting machine, the left weft laying moving mechanism slidably mounted on the left support frame, the right weft laying moving mechanism slidably mounted on the right support frame, and a driving structure for driving the left weft laying moving mechanism and the right weft laying moving mechanism to move.
[0011] Optionally, the left weft laying moving mechanism includes a left frame slidably mounted on a left support frame, a left base fixedly connected to the left frame, a first mounting plate slidably mounted on the left base, a first translation component for driving the first mounting plate to translate fixedly connected to the left base, and a left weft laying trolley, a left cutting mechanism and a left yarn clamping mechanism fixedly connected to the first mounting plate respectively.
[0012] Optionally, the right weft-laying moving mechanism includes a right base slidably mounted on a right support frame, a second mounting plate slidably mounted on the right base, a second translation component for driving the second mounting plate to translate fixedly connected to the right base, and a right weft-laying trolley and a right yarn clamping mechanism fixedly connected to the second mounting plate.
[0013] Optionally, a number of rollers are rotatably connected to the second mounting plate, and a guide support plate is fixedly connected to the right base, with the rollers and the guide support plate in contact.
[0014] Optionally, the drive structure includes a first drive shaft and a first synchronous shaft rotatably mounted on the right base, two second drive shafts rotatably connected to the left frame, a second synchronous shaft rotatably connected to the left frame, the first drive shaft and the first synchronous shaft, as well as the second drive shaft and the second synchronous shaft, are connected by a synchronizing element, an upper transmission shaft is rotatably connected to the top of the left frame, a steering shaft is rotatably connected to the left frame, the upper transmission shaft and a second drive shaft located below the upper transmission shaft are both connected to the steering shaft by a commutator, rolling gears are fixedly sleeved on the outside of the upper transmission shaft, the first synchronous shaft and the second synchronous shaft, and racks that mesh with the rolling gears are fixedly connected to the right support frame, the left support frame and the upper support seat.
[0015] Optionally, the synchronizing element includes transmission gears that are respectively fixedly sleeved on the outside of the first drive shaft, the first synchronous shaft, the second drive shaft, and the second synchronous shaft, with adjacent transmission gears meshing with each other.
[0016] Optionally, a winding mechanism for winding is fixedly connected to the warp knitting machine main unit, and a traction mechanism adapted to the winding mechanism is installed on the warp knitting machine main unit.
[0017] The beneficial effects of this invention are as follows: The first weft-laying component is fixedly installed on the warp knitting machine main unit, which means that the first weft-laying component does not need to be moved. The structure is simple and reliable, and the fixed installation ensures the stability of long-term operation. It is not affected by the movement of the weft-laying execution structure. No matter how the second type of fiber yarn enters or exits, the reference position of the first type of fiber yarn remains unchanged. There is no need for recalibration or to consider the structural limitations caused by movement requirements. When the second type of fiber yarn is being woven, the weft-laying execution structure moves into the weft-laying area. Although the first weft-laying component is stationary, it is repositioned or covered, so as not to interfere with the operation of the weft-laying execution structure. When the first type of fiber yarn is being woven, the weft-laying execution structure completely exits the working position, does not occupy the weft-laying space, and does not affect the normal operation of the first weft-laying component. This space reuse realizes two uses for one machine without expanding the equipment footprint. It is conducive to equipment sharing, realizes the flexibility of production and cost savings, and creates the unique technical value of integrated hybrid material prefabrication. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the second weft-laying component according to an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram of the weft laying moving mechanism on the left side in an embodiment of the present invention; Figure 4 This is a front view of the weft-laying moving mechanism on the left side of an embodiment of the present invention; Figure 5 For the present invention Figure 4 Sectional view of AA; Figure 6 This is a three-dimensional structural diagram of the weft laying moving mechanism on the right side of an embodiment of the present invention; Figure 7 This is a front view of the weft-laying moving mechanism on the right side of an embodiment of the present invention; Figure 8 For the present invention Figure 7 Sectional view of BB; Figure 9 For the present invention Figure 7 A magnified structural diagram of region I in the middle.
[0020] The diagram is marked as follows: 1. Second weft-laying assembly; 2. First weft-laying assembly; 7. Warp knitting machine main unit; 8. Traction mechanism; 9. Rewinding mechanism; 12. Right base; 14. Right weft-laying carriage; 16. Right yarn clamping mechanism; 21. Side weft yarn trellis; 22. Left weft-laying moving mechanism; 23. Upper support seat; 24. Weft pulling mechanism; 25. Right weft-laying moving mechanism; 26. Right support frame; 27. Left support frame; 31. Left frame; 33. Left weft-laying carriage; 34. Left base; 35. First mounting plate; 36. Left yarn clamping mechanism; 38. Left cutter mechanism; 41. First drive shaft; 42. First synchronous shaft; 43. Second synchronous shaft; 45. Second drive shaft; 46. Steering shaft; 47. Reversing device; 48. Upper transmission shaft; 51. Roller; 52. Guide support plate; 53. Second mounting plate. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments.
[0022] Example 1, by Figure 1 , Figure 2 , Figure 3 and Figure 6The present invention includes a warp knitting machine main unit 7, and further includes: a first weft-laying assembly 2, fixedly mounted on the frame of the warp knitting machine main unit 7, for laying a first type of fiber yarn; and a second weft-laying assembly 1, including a weft-laying execution structure and a driving structure. The weft-laying execution structure is used to lay a second type of fiber yarn, and the driving structure is fixedly mounted on the frame of the warp knitting machine main unit 7 for driving the weft-laying execution structure to move between a working position and a standby position. When knitting the first type of fiber yarn, the weft-laying execution structure is in the standby position, and the first weft-laying assembly 2 is located in the weft-laying area to lay weft. When knitting the second type of fiber yarn, the driving structure drives the weft-laying execution structure to move to the working position, and the first weft-laying assembly 2 remains fixed, with the weft-laying execution structure laying weft in the weft-laying area. The weft-laying execution structure can be optimized for different types of fiber yarns, such as large curvature radius guidance and synchronous yarn feeding structures to avoid sharp turns and friction. A flexible yarn clamping mechanism can be integrated into the weft-laying execution structure for controllable pressure clamping. Carbon fiber avoids surface fuzzing. Since the first weft-laying component 2 is fixedly installed on the warp knitting machine main unit 7, it means that the first weft-laying component 2 does not need to be moved. The structure is simple and reliable. The fixed installation ensures the stability of long-term operation and is not affected by the movement of the weft-laying execution structure. No matter how the second type of fiber yarn enters or exits, the reference position of the first type of fiber yarn remains unchanged. There is no need for recalibration or structural limitations caused by movement requirements. When the second type of fiber yarn is being woven, the weft-laying execution structure moves into the weft-laying area. Although the first weft-laying component 2 is stationary, it is repositioned or covered, without interfering with the operation of the weft-laying execution structure. When the first type of fiber yarn is being woven, the weft-laying execution structure completely exits the working position, does not occupy the weft-laying space, and does not affect the normal operation of the first weft-laying component 2. This space reuse realizes two uses for one machine without expanding the equipment footprint. It is conducive to equipment sharing, realizes production flexibility and cost savings, and creates the unique technical value of integrated hybrid material prefabrication.
[0023] Example 2, based on Example 1, is... Figure 1 , Figure 2 , Figure 3 , Figure 6 , Figure 7 , Figure 8 and Figure 9The first type of fiber yarn is glass fiber, and the second type of fiber yarn is carbon fiber. The weft laying execution structure includes a side weft yarn frame 21 slidably mounted on the frame of the warp knitting machine main unit 7. A left weft laying moving mechanism 22 is fixedly connected to the side weft yarn frame 21. An upper support base 23, a weft pulling mechanism 24, a right support frame 26, and a left support frame 27 are fixedly connected to the frame of the warp knitting machine main unit 7. The left weft laying moving mechanism 22 is slidably mounted on the left support frame 27, and the right weft laying moving mechanism 25 is slidably mounted on the right support frame 26. A driving structure is used to drive the left weft laying moving mechanism 22 and the right weft laying moving mechanism 25 to move. The left weft laying moving mechanism 22 includes a left frame 31 slidably mounted on the left support frame 27. A left base 34 is fixedly connected to the left frame 31. A first mounting plate 35 is slidably mounted on the left base 34. A first translation component for driving the first mounting plate 35 to move is fixedly connected to the left base 34. A left weft laying trolley 33, a left cutting mechanism 38, and a left yarn clamping mechanism 36 are fixedly connected to the first mounting plate 35. The right weft laying moving mechanism 25 includes a right base 12 slidably mounted on the right support frame 26. A second mounting plate 53 is slidably mounted on the right base 12. A second translation component for driving the second mounting plate 53 to move is fixedly connected to the right base 12. A right weft laying trolley 14 and a right yarn clamping mechanism 16 are fixedly connected to the second mounting plate 53. Several rollers 51 are rotatably connected to the second mounting plate 53. A guide support plate 52 is fixedly connected to the right base 12, and the rollers 51 and the guide support plate 52 are in contact. A first translation component is installed on the left base 34, and a second translation component is installed on the right base 12. Both the first and second translation components can be hydraulic telescopic rods. The first and second translation components can drive the first mounting plate 35 and the second mounting plate 53 to move horizontally, thereby changing the horizontal positions of the left weft laying carriage 33, the left cutting mechanism 38, the left yarn clamping mechanism 36, the right weft laying carriage 14, and the right yarn clamping mechanism 16. These components are all important parts in the yarn laying process, and they cooperate with each other to form a certain continuous laying pattern for yarn laying. When the second mounting plate 53 moves, the second mounting plate 53 drives the roller 51 to roll on the guide support plate 52. The cooperation between the roller 51 and the guide support plate 52 increases the stability of the second mounting plate 53 during translation.
[0024] Example 3, based on Example 2, by Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8The drive structure includes a first drive shaft 41 and a first synchronous shaft 42 rotatably mounted on the right base 12. Two second drive shafts 45 are rotatably connected to the left frame 31, and a second synchronous shaft 43 is rotatably connected to the left frame 31. The first drive shaft 41 and the first synchronous shaft 42, as well as the second drive shafts 45 and the second synchronous shaft 43, are connected by synchronizing components. An upper drive shaft 48 is rotatably connected to the top of the left frame 31, and a steering shaft 46 is rotatably connected to the left frame 31. The upper drive shaft 48 and a second drive shaft 45 located below the upper drive shaft 48 are both connected to the rotary axis via a commutator 47. The upper drive shaft 48, the first synchronous shaft 42 and the second synchronous shaft 43 are all fixedly fitted with rolling gears. The right support frame 26, the left support frame 27 and the upper support seat 23 are all fixedly connected with racks that mesh with the rolling gears. The synchronizing element includes transmission gears that are fixedly fitted on the outside of the first drive shaft 41, the first synchronous shaft 42, the second drive shaft 45 and the second synchronous shaft 43 respectively. Adjacent transmission gears mesh with each other. The warp knitting machine main unit 7 is fixedly connected with a winding mechanism 9 for winding. The warp knitting machine main unit 7 is equipped with a traction mechanism 8 that is adapted to the winding mechanism 9. Servo motors can be fixedly connected to both the left frame 31 and the right base 12. The servo motors drive the first drive shaft 41 and the second drive shaft 45 to rotate. The rotation of the first drive shaft 41 and the second drive shaft 45 can be driven automatically or manually. The first drive shaft 41 and the second drive shaft 45 are driven by the meshing of the synchronous components to make the first synchronous shaft 42 and the second synchronous shaft 43 rotate. The second drive shaft 45 drives the upper transmission shaft 48 to rotate synchronously through the commutator 47 and the steering shaft 46. The first synchronous shaft 42, the second synchronous shaft 43 and the upper transmission shaft 48 can drive the rolling gear to rotate. The rolling gear can roll on the rack of the right support frame 26, the upper support seat 23 and the left support frame 27, so that the left frame 31 and the right base 12 can move as a whole. This ensures that the left weft laying moving mechanism 22 and the right weft laying moving mechanism 25 can move between the working position and the standby position. The warp knitting machine main unit 7, the traction mechanism 8 and the winding mechanism 9 at the rear of the whole equipment are shared to meet the weaving of carbon fiber and glass fiber.
[0025] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention is limited to these examples; within the framework of the invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
Claims
1. A multi-axial warp knitting machine capable of weaving both carbon fiber and glass fiber, comprising a warp knitting machine main unit (7), characterized in that, Also includes: The first weft laying component (2) is fixedly installed on the frame of the warp knitting machine main unit (7) and is used to lay the first type of fiber yarn; The second weft-laying component (1) includes a weft-laying execution structure and a driving structure. The weft-laying execution structure is used to lay the second type of fiber yarn. The driving structure is fixedly installed on the frame of the warp knitting machine host (7) and is used to drive the weft-laying execution structure to move between the working position and the standby position. When weaving the first type of fiber yarn, the weft-laying execution structure is located in the standby position, and the first weft-laying component (2) is located in the weft-laying area to lay weft. When weaving the second type of fiber yarn, the driving structure drives the weft-laying execution structure to move to the working position, and the first weft-laying component (2) remains in a fixed state, and the weft-laying execution structure lays weft in the weft-laying area.
2. The multi-axial warp knitting machine capable of weaving both carbon fiber and glass fiber according to claim 1, characterized in that, The first type of fiber yarn is glass fiber, and the second type of fiber yarn is carbon fiber.
3. The multi-axial warp knitting machine capable of weaving both carbon fiber and glass fiber according to claim 1, characterized in that, The weft laying execution structure includes a side weft yarn frame (21) that is slidably mounted on the frame of the warp knitting machine (7). A left weft laying moving mechanism (22) is fixedly connected to the side weft yarn frame (21). An upper support seat (23), a weft pulling mechanism (24), a right support frame (26) and a left support frame (27) are fixedly connected to the frame of the warp knitting machine (7). The left weft laying moving mechanism (22) is slidably mounted on the left support frame (27), and the right weft laying moving mechanism (25) is slidably mounted on the right support frame (26). The driving structure is used to drive the left weft laying moving mechanism (22) and the right weft laying moving mechanism (25) to move.
4. The multi-axial warp knitting machine capable of weaving both carbon fiber and glass fiber according to claim 3, characterized in that, The left weft laying moving mechanism (22) includes a left frame (31) slidably mounted on the left support frame (27), a left base (34) fixedly connected to the left frame (31), a first mounting plate (35) slidably mounted on the left base (34), a first translation component for driving the first mounting plate (35) to translate fixedly connected to the left base (34), and a left weft laying trolley (33), a left cutting mechanism (38) and a left yarn clamping mechanism (36) fixedly connected to the first mounting plate (35).
5. The multi-axial warp knitting machine capable of weaving both carbon fiber and glass fiber according to claim 4, characterized in that, The right weft laying moving mechanism (25) includes a right base (12) slidably mounted on the right support frame (26), a second mounting plate (53) slidably mounted on the right base (12), a second translation component for driving the second mounting plate (53) to translate is fixedly connected on the right base (12), and a right weft laying trolley (14) and a right yarn clamping mechanism (16) are fixedly connected on the second mounting plate (53).
6. The multi-axial warp knitting machine capable of weaving both carbon fiber and glass fiber according to claim 5, characterized in that, The second mounting plate (53) is rotatably connected to several rollers (51), and the right base (12) is fixedly connected to a guide support plate (52), with the rollers (51) and the guide support plate (52) in contact.
7. The multi-axial warp knitting machine capable of weaving both carbon fiber and glass fiber according to claim 5, characterized in that, The drive structure includes a first drive shaft (41) and a first synchronous shaft (42) rotatably mounted on the right base (12). Two second drive shafts (45) are rotatably connected to the left frame (31), and a second synchronous shaft (43) is rotatably connected to the left frame (31). The first drive shaft (41) and the first synchronous shaft (42), as well as the second drive shaft (45) and the second synchronous shaft (43), are connected by synchronizing components. An upper drive shaft (48) is rotatably connected above the left frame (31). A steering shaft (46) is rotatably connected to the left frame (31). The upper drive shaft (48) and a second drive shaft (45) located below the upper drive shaft (48) are connected to the steering shaft (46) through a commutator (47). Rolling gears are fixedly sleeved on the outside of the upper drive shaft (48), the first synchronous shaft (42), and the second synchronous shaft (43). Racks that mesh with the rolling gears are fixedly connected to the right support frame (26), the left support frame (27), and the upper support seat (23).
8. The multi-axial warp knitting machine capable of weaving both carbon fiber and glass fiber according to claim 7, characterized in that, The synchronizing element includes transmission gears that are respectively fixedly sleeved on the outside of the first drive shaft (41), the first synchronizing shaft (42), the second drive shaft (45), and the second synchronizing shaft (43), with adjacent transmission gears meshing with each other.
9. The multi-axial warp knitting machine capable of weaving both carbon fiber and glass fiber according to claim 1, characterized in that, The warp knitting machine host (7) is fixedly connected to a winding mechanism (9) for winding, and the warp knitting machine host (7) is equipped with a traction mechanism (8) adapted to the winding mechanism (9).