Core rod adjusting and yarn collecting device for pulling, weaving and winding forming and working method

Abstract

The invention provides a core rod adjusting and yarn collecting device for pulling, weaving and winding forming and a working method, the core rod adjusting and yarn collecting device comprises an adjusting tool and a supporting tool which are sequentially arranged in the length direction of a core rod, a glue injection pipe is arranged in the core rod, and the adjusting tool comprises an adjusting assembly and a mold; the supporting tool comprises a first yarn splitting plate, a second yarn splitting plate and a supporting assembly, a first through hole is formed in the center of the first yarn splitting plate, a lifting assembly is arranged on the first yarn splitting plate and located below the first through hole, the lifting assembly comprises a fixing base, the fixing base is installed on the first yarn splitting plate, and the supporting assembly is arranged on the fixing base. A sliding block is arranged on the fixed seat in a sliding mode, a round roller assembly is arranged at the top end of the sliding block, and a pushing assembly is arranged at the bottom end of the sliding block; and the first yarn splitting plate is connected with the second yarn splitting plate through a shaping column. The problem that an existing device cannot dynamically compensate non-uniform fiber distribution caused by the deflection change of a core mold in the forming process is solved.

Description

Technical Field

[0001] This invention belongs to the field of fiber product processing technology, specifically relating to a mandrel adjustment and yarn take-up device and its working method for filament braiding. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Pultrusion-braiding-winding integrated molding technology is an important process in the field of composite material preparation, especially suitable for the continuous production of high-performance composite profiles such as large-tow carbon fibers. This technology combines the advantages of rapid cross-section forming in pultrusion, the three-dimensional structural reinforcement in braiding, and the circumferential and specific-angle reinforcement in winding, promising to achieve efficient manufacturing of high-performance, complex structural profiles. However, when molding long-dimension, large-section products, especially with long mandrels, there are problems with uncontrollable positioning and deformation during the molding process.

[0004] While existing technical solutions provide the ability to make minor adjustments to the mandrel, the adjustment mechanisms are mostly limited to simple displacement at the beginning or end. This adjustment method cannot dynamically compensate for the uneven fiber distribution caused by changes in mandrel deflection during the molding process, which can easily lead to defects such as resin-rich areas, dry yarn, or uneven thickness inside the product. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a mandrel adjustment and yarn take-up device and working method for braiding and winding, which solves the problem that existing devices cannot dynamically compensate for uneven fiber distribution caused by changes in mandrel deflection during the forming process.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides a mandrel adjustment and yarn take-up device for braiding and winding, comprising: an adjustment fixture and a support fixture arranged sequentially along the length of the mandrel; the mandrel having a glue injection tube disposed therein; the adjustment fixture including an adjustment component and a mold; the support fixture including a first yarn separating plate, a second yarn separating plate, and a support component; the first yarn separating plate having a first through hole at its center; a lifting component disposed on the first yarn separating plate and located below the first through hole; the lifting component including a fixed seat mounted on the first yarn separating plate; a sliding block slidably disposed on the fixed seat; a roller assembly disposed at the top of the sliding block; and a pushing component disposed at the bottom of the sliding block; the first yarn separating plate being connected to the second yarn separating plate via a shaping column; the mandrel passing through the first and second yarn separating plates and inserted into the adjustment fixture; the yarn passing through the first and second yarn separating plates and entering the adjustment fixture along the side wall of the mandrel, and being cured and molded in the mold by resin.

[0007] As a further implementation, a slide rail is hinged between the shaping column and the second yarn separating plate. Multiple slide rails and shaping columns are provided, and there is a one-to-one correspondence between the shaping column and the slide rail. The slide rail is slidably connected to one end of the shaping column, and the other end of the shaping column is fixedly connected to the first yarn separating plate.

[0008] As a further implementation, both the first and second yarn separating plates are provided with yarn threading holes.

[0009] As a further implementation, the second yarn dividing plate is annular, and a second through hole is provided at the center of the second yarn dividing plate for the mandrel to pass through, and the yarn passing holes on the second yarn dividing plate are arranged around the second through hole.

[0010] As a further implementation, the pushing component includes a rotating rod and a positioning seat, wherein the rotating rod and the positioning seat are connected in a circumferentially rotating and axially fixed manner, and the rotating rod and the sliding block are connected by a thread.

[0011] As a further implementation, the adjustment assembly includes an upper and lower adjustment plate and a left and right adjustment plate, which are mounted on the mold via a fixed frame; the upper and lower ends of the upper and lower adjustment plates are connected to the fixed frame via threaded push rods, and the two ends of the left and right adjustment plates are connected to the fixed frame via threaded push rods.

[0012] As a further implementation, a third through hole is provided at the center of both the upper and lower adjustment plates and the left and right adjustment plates for the mandrel and yarn to pass through.

[0013] As a further implementation, the mold is a rectangular columnar structure, and a mold cavity is provided at the center of the mold along the length direction.

[0014] As a further implementation, the mandrel includes a mold section and multiple connecting sections. The mold section is a hollow tubular structure with a glue injection port on its side wall. The mold section is located at the end of the mandrel. The glue injection tube is disposed in the connecting section. The connecting section and the mold section are connected by threads, and adjacent connecting sections are connected by threads.

[0015] Secondly, the present invention also provides a method for operating a mandrel adjustment and yarn take-up device for braiding and winding, comprising the following steps: Step 1: Draw the straight yarn from the yarn rack and complete the straight yarn threading work according to the threading diagram; Step 2: Connect the mold section and the connecting section. Connect the end of the mandrel away from the mold section to the glue injection machine. The mandrel is conveyed along with the yarn through the support fixture and towards the mold. The rotating rod pushes the roller assembly to adjust up and down. The roller assembly rotates to drive the mandrel to move. Adjust the relative position of the shaping column and the slide rail to ensure that the position of the second yarn feeding plate does not interfere with the mandrel. Step 3: After the mandrel passes through the third through hole with the yarn, adjust the mandrel to the set position using the upper and lower adjustment plates and the left and right adjustment plates; Step 4: After the top of the mandrel reaches the tail of the mold, the tail of the mandrel needs to be installed and fixed with bolts; then resin is continuously injected through the glue injection machine, and the yarn is shaped by the resin and continues to move along the mold cavity.

[0016] Compared with the prior art, the advantages and positive effects of this invention are: This invention addresses the challenges of difficult impregnation and positioning during the molding process by arranging adjustment and support fixtures sequentially along the length of the mandrel. The mandrel contains an injection tube integrated with it, eliminating the need for complex external piping. The mandrel injection method, along with the adjustment and support fixtures, achieves intermediate support, yarn splitting and bundling, and vertical / horizontal adjustment at the mold, thus resolving these issues. The support fixture includes a first yarn splitting plate, a second yarn splitting plate, and a support assembly. The first yarn splitting plate has a first through-hole at its center and a lifting assembly positioned below it, effectively solving the problems of difficult adjustment and excessive deflection in the middle of the pultruded long mandrel. The lifting assembly includes a fixed base mounted on the first yarn splitting plate, a sliding block slidably mounted on the base, a roller assembly at the top of the sliding block, and a pushing assembly at the bottom. The roller assembly at the top of the lifting assembly, in conjunction with the pushing assembly, enables height adjustment of the mandrel. This design solves the problem of excessive mandrel deflection and reduces friction between the mandrel and the roller, preventing fuzzing when the yarn contacts the mandrel. It allows for vertical adjustment of extra-long mandrels. The mandrel support fixture has a round rod at its contact point with the mandrel. The first yarn separating plate is connected to the second yarn separating plate via a shaping column. The mandrel passes through the first and second yarn separating plates and is inserted into the adjustment fixture. After passing through the first and second yarn separating plates, the yarn enters the adjustment fixture along the side wall of the mandrel. Resin is injected into the mold through an injection tube, allowing the yarn to cure and solidify within the mold. The mandrel injection method, along with the adjustment and support fixtures, achieves intermediate support, yarn separating and bundling, and vertical and horizontal adjustment at the mold, solving the problems of difficult impregnation and positioning adjustment during the molding process.

[0017] This invention utilizes a slide rail between a shaping post and a second yarn-dividing plate. Multiple slide rails and shaping posts are provided, with a one-to-one correspondence between the shaping posts and slide rails. One end of the slide rail is slidably connected to one end of the shaping post, while the other end of the shaping post is fixedly connected to the first yarn-dividing plate. The slide rail is hinged to the second yarn-dividing plate, allowing the second yarn-dividing plate to adapt to the fixed-position shaping post during movement, thus ensuring that the position of the second yarn-threading plate does not interfere with the mandrel. A second through-hole is located at the center of the second yarn-dividing plate, and yarn-threading holes on the second yarn-dividing plate are arranged around this second through-hole. The second through-hole allows the mandrel to pass through and ensures that the mandrel is centered, thus maintaining a uniform distance between the mandrel and the yarn. The yarn-threading holes arranged around the center guide each yarn, maintaining a fixed distance between it and the mandrel.

[0018] The mandrel of the present invention includes a mold section and multiple connecting sections. The mold section is a hollow tubular structure with a glue injection port on its side wall. The mold section is located at the end of the mandrel. The glue injection tube is located in the connecting section. Resin is injected from the inside of the mandrel into the mold cavity from the outside, which can ensure that the resin is uniformly and simultaneously impregnating the yarn along the length of the product. Especially for products with large cross-sections or thick walls, it is more efficient and produces fewer air bubbles than external glue injection. The connecting sections are connected to the mold section by threads, and adjacent connecting sections are connected by threads. By splicing multiple connecting sections, the function and effect of an ultra-long mandrel can be achieved. Attached Figure Description

[0019] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0020] Figure 1 This is a schematic diagram of the supporting tooling structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the adjustment tooling structure of the present invention.

[0022] Figure 3 This is a schematic diagram of the mandrel structure of the present invention.

[0023] In the diagram: 1. First yarn separating plate; 2. First through hole; 3. Sliding block; 4. Fixed seat; 5. Positioning seat; 6. Rotating rod; 7. Circular roller assembly; 8. Core rod; 9. Glue injection tube; 10. Shaping column; 11. Slide rail; 12. Second yarn separating plate; 13. Yarn threading hole; 14. Second through hole; 15. Upper and lower adjusting plate; 16. Left and right adjusting plate; 17. Mold; 18. Mold cavity; 19. Fixed frame; 20. Third through hole; 21. Mold section; 22. Connecting section. Detailed Implementation

[0024] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0025] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. Example 1 This embodiment provides a mandrel adjustment and yarn take-up device for pull-knitting forming, such as... Figures 1-3 As shown, the system includes: an adjustment fixture and a support fixture arranged sequentially along the length of the mandrel 8. A glue injection tube 9 is installed in the mandrel 8, and the glue injection tube 9 is integrated with the mandrel 8, eliminating the need for complex piping outside the mold 17, resulting in a clean and highly reliable system. The adjustment fixture includes an adjustment component and the mold 17. The support fixture includes a first yarn separating plate 1, a second yarn separating plate 12, and a support component. A first through hole 2 is provided at the center of the first yarn separating plate 1. A lifting component is installed on the first yarn separating plate 1, located below the first through hole 2, effectively solving the problems of difficulty in adjusting the pultruded long mandrel 8 and excessive deflection in the middle position. The lifting component includes a fixed seat 4, which is installed on the first yarn separating plate 1. A sliding block 3 is slidably arranged on the fixed seat 4. A roller assembly 7 is provided at the top of the sliding block 3, and a pushing component is provided at the bottom of the sliding block 3. The height of the mandrel 8 can be adjusted by the roller assembly 7 at the top of the lifting assembly in conjunction with the pushing assembly to solve the problem of excessive deflection of the mandrel 8. At the same time, it can reduce the friction between the mandrel 8 and the roller, and avoid fuzzing when the yarn comes into contact with the mandrel 8. It can realize the up and down adjustment of the extra-long mandrel 8. The contact part between the mandrel 8 support fixture and the mandrel 8 is a round rod. The first yarn separating plate 1 is connected to the second yarn separating plate 12 through the shaping column 10. The mandrel 8 passes through the first yarn separating plate 1 and the second yarn separating plate 12 and is inserted into the adjusting fixture. After passing through the first yarn separating plate 1 and the second yarn separating plate 12, the yarn enters the adjusting fixture along the side wall of the mandrel 8. The adjusting fixture solves the problem of product thickness and straightness deviation caused by excessive deflection due to gravity in pultruded straight yarn. Resin is injected into the mold 17 through the injection tube 9, so that the yarn is cured and shaped in the mold 17 by the resin. By using a mandrel 8-powder injection method, along with adjusting and supporting fixtures to achieve intermediate support and yarn splitting / bundling, and by adjusting the mold at 17 points in all directions, the problems of difficult impregnation and difficult positioning adjustment during the molding process are solved.

[0026] As a further implementation, a slide rail 11 is hinged between the shaping column 10 and the second yarn separating plate 12. Multiple slide rails 11 and shaping columns 10 are provided, and there is a one-to-one correspondence between the shaping column 10 and the slide rail 11. The slide rail 11 is slidably connected to one end of the shaping column 10, and the other end of the shaping column 10 is fixedly connected to the first yarn separating plate 1. By hinged between the slide rail 11 and the second yarn separating plate 12, the second yarn separating plate 12 can adapt to the fixed-position shaping column 10 during the position movement, thereby ensuring that the position of the second yarn threading plate does not interfere with the core rod 8.

[0027] As a further implementation, both the first yarn separating plate 1 and the second yarn separating plate 12 are provided with yarn threading holes 13, through which the yarn is wound.

[0028] As a further implementation, the second yarn dividing plate 12 is annular, and a second through hole 14 is provided at the center of the second yarn dividing plate 12. The yarn passing holes 13 on the second yarn dividing plate 12 are arranged around the second through hole 14. The second through hole 14 is used to pass through the mandrel 8 and ensure that the mandrel 8 is in the center position, so that the distance between the mandrel 8 and the yarn is the same. The yarn passing holes 13 arranged around the center are used to guide each yarn so that it maintains a fixed distance from the mandrel 8.

[0029] As a further implementation, the pushing assembly includes a rotating rod 6 and a positioning seat 5. The rotating rod 6 and the positioning seat 5 are connected in a circumferentially rotating and axially fixed manner. The rotating rod 6 and the sliding block 3 are connected by a thread. The pushing assembly requires the use of a hex wrench to turn the rotating rod 6. The axial movement between the rotating rod 6 and the sliding block 3 realizes the up-and-down adjustment of the roller assembly 7 on the support assembly. The roller assembly 7 is in a continuous rotating state during the transmission of the mandrel 8 until the mandrel 8 is inserted into the mold 17. This can reduce the friction between the support assembly and the mandrel 8, thereby avoiding the yarn from fuzzing when moving along the mandrel 8.

[0030] As a further implementation, the adjustment assembly includes an upper and lower adjustment plate 15 and a left and right adjustment plate 16, which are mounted on the mold 17 via a fixing frame 19. The upper and lower ends of the upper and lower adjustment plate 15 are connected to the fixing frame 19 via threaded push rods, and the two ends of the left and right adjustment plate 16 are connected to the fixing frame 19 via threaded push rods. By adding the upper, lower, left, and right adjustment plates 16 to the mold 17, and in conjunction with the support fixture, the mandrel 8 can be adjusted "front-middle-rear," ensuring the straightness and wall thickness consistency of the product.

[0031] As a further implementation, a third through hole 20 is provided at the center of both the upper and lower adjusting plate 15 and the left and right adjusting plate 16 for the mandrel 8 and the yarn to pass through.

[0032] As a further implementation, the mold 17 is a rectangular columnar structure, and a mold cavity 18 is provided in the center of the mold 17 along the length direction. The mold cavity 18 is used to insert the mandrel 8 and the yarn, and the yarn is shaped in the mold cavity 18 by a glue injection machine.

[0033] As a further implementation, the mandrel 8 includes a mold section 21 and multiple connecting sections 22. The mold section 21 is a hollow tubular structure with a glue injection port on its side wall. The mold section 21 is located at the end of the mandrel 8. The glue injection tube 9 is disposed in the connecting section 22. Resin is injected from the inside of the mandrel 8 into the mold cavity 18, which can ensure that the resin is uniformly and simultaneously impregnating the yarn along the length of the product. Especially for products with large cross-sections or thick walls, it is more efficient and produces fewer air bubbles than external glue injection. The connecting section 22 is connected to the mold section 21 by threads, and adjacent connecting sections 22 are connected by threads. By splicing multiple connecting sections 22, the function and effect of an extra-long mandrel 8 can be achieved.

[0034] Example 2 This embodiment provides a working method for a mandrel 8 adjustment and yarn take-up device used in pull-knitting forming, including the following steps: Step 1: Draw the straight yarn from the yarn rack and complete the straight yarn threading work according to the threading diagram; Step 2: The mold section 21 and the connecting section 22 are connected by threads. The end of the mandrel 8 away from the mold section 21 is connected to the glue injection machine. The mandrel 8 is conveyed along with the yarn through the support fixture and towards the mold 17. The rotating rod 6 pushes the roller assembly 7 to adjust up and down. The roller assembly 7 rotates to drive the mandrel 8 to move. The relative position of the shaping column 10 and the slide rail 11 is adjusted to ensure that the position of the second yarn feeding plate and the mandrel 8 do not interfere with each other. Step 3: After the mandrel 8 passes through the third through hole 20 with the yarn, the mandrel 8 is adjusted to the set position by the upper and lower adjustment plate 15 and the left and right adjustment plate 16. Step 4: After the top of the mandrel 8 reaches the tail of the mold 17, the tail of the mandrel 8 needs to be fixed with bolts; then, resin is continuously injected through the glue injection machine. The resin reaches the mold cavity 18 through the glue injection tube 9, which can ensure that the resin impregnates the yarn evenly and simultaneously along the length of the product. This ensures that the yarn continues to move along the mold cavity 18 after being shaped by the resin, solving the problem that large-bundle, thick products cannot be continuously impregnated.

[0035] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A device for adjusting and collecting yarns for pull-braiding, characterized in that, The application relates to a yarn shaping device and a yarn shaping method. The device comprises an adjusting tool and a supporting tool arranged along the length direction of a mandrel, the mandrel is provided with a glue injection pipe, the adjusting tool comprises an adjusting assembly and a mold; The supporting tool comprises a first yarn distributing plate, a second yarn distributing plate and a supporting assembly, a first through hole is arranged at the center position of the first yarn distributing plate, a lifting assembly is arranged on the first yarn distributing plate and below the first through hole, the lifting assembly comprises a fixing seat, the fixing seat is mounted on the first yarn distributing plate, a sliding block is slidably arranged on the fixing seat, a round roller assembly is arranged at the top end of the sliding block, and a pushing assembly is arranged at the bottom end of the sliding block; the first yarn distributing plate is connected with the second yarn distributing plate through a shaping column; the mandrel passes through the first yarn distributing plate and the second yarn distributing plate, is inserted into the adjusting tool, yarns pass through the first yarn distributing plate and the second yarn distributing plate, enter the adjusting tool along the side wall of the mandrel, and are cured and formed in the mold through resin.

2. A device for adjusting and collecting yarns for pull-twist forming as claimed in claim 1, characterized in that A slide rail is hingedly arranged between the shaping column and the second yarn distributing plate, the slide rail and the shaping column are both provided with a plurality of slide rails, and the shaping column and the slide rail correspond to each other, one end of the slide rail is slidably connected with the shaping column, and the other end of the shaping column is fixedly connected with the first yarn distributing plate.

3. A core rod adjusting and yarn collecting device for pull-twist forming as claimed in claim 2, characterized in that The first yarn distributing plate and the second yarn distributing plate are both provided with yarn passing holes.

4. A core rod adjusting and yarn collecting device for pull-twist forming as claimed in claim 1, wherein, The second yarn distributing plate is annular, a second through hole is arranged at the center position of the second yarn distributing plate and used for passing through the mandrel, and the yarn passing holes on the second yarn distributing plate are arranged around the second through hole.

5. A device for adjusting and collecting yarns for pull-twist forming according to claim 4, characterized in that The pushing assembly comprises a rotating rod and a positioning seat, the rotating rod and the positioning seat are connected in a circumferential rotation and axial fixing mode, and the rotating rod and the sliding block are connected in a threaded mode.

6. A core rod adjusting and yarn collecting device for pull-twist forming as defined in claim 1, wherein The adjusting assembly comprises up-down adjusting plates and left-right adjusting plates, the up-down adjusting plates and the left-right adjusting plates are mounted on the mold through a fixing frame; the up-down adjusting plates are connected with the fixing frame through threaded top rods at the upper end and the lower end, and the left-right adjusting plates are connected with the fixing frame through threaded top rods at the two side ends.

7. A device for adjusting and collecting yarns for pull-twist forming according to claim 6, characterized in that Third through holes are arranged at the center positions of the up-down adjusting plates and the left-right adjusting plates and used for passing through the mandrel and the yarns.

8. A device for adjusting and collecting yarns for pull-twist forming according to claim 7, characterized in that The mold is a rectangular column structure, and a model cavity is arranged at the center of the mold along the length direction.

9. A device for adjusting and collecting yarns for pull-twist forming according to claim 8, characterized in that The mandrel comprises a mold section and a plurality of connecting sections, the mold section is a hollow tubular structure and is provided with a glue injection port on the side wall, the mold section is located at the end of the mandrel, the glue injection pipe is arranged in the connecting section, the connecting section and the mold section are connected through threads, and adjacent connecting sections are connected through threads.

10. A method of operating a device for adjusting and collecting yarns for a pull- twist forming process according to any one of claims 1 to 9, characterized in that The method comprises the following steps: Step one: straight yarns are drawn out from a yarn frame, and straight yarn threading is completed according to a yarn threading diagram; Step two: the mold section and the connecting section are connected, one end of the mandrel away from the mold section is connected with a glue injection machine, the mandrel is conveyed along with the yarns through the supporting tool and towards the mold, the up-down adjusting of the round roller assembly is realized through the pushing of the rotating rod, the round roller assembly is rotated to drive the movement of the mandrel, and the relative positions of the shaping column and the slide rail are adjusted to ensure that the positions of the second yarn distributing plate and the mandrel do not interfere with each other. Step three: after the core rod passes through the third through hole with the yarn, the core rod is adjusted to the set position by the upper and lower adjusting plates and the left and right adjusting plates; Step four: until the top of the core rod reaches the tail of the mold, the tail of the core rod needs to be installed and fixed with bolts; then the resin is continuously added by the resin injection machine, and the yarn is continuously moved along the mold cavity after being shaped by the resin.

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