Continuous carbon fiber composite wire dipping preparation device and wire harness coating machine
By designing a continuous carbon fiber composite wire impregnation preparation device, the molten organic material is uniformly impregnated into the carbon fiber bundle using a cavity and heating mechanism, which solves the problems of low impregnation degree and unevenness in the existing technology and improves the mechanical properties and preparation efficiency of the wire.
Patent Information
- Application Number
- CN202423032900.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Priority Date
- 2024-10-12
- Filing Date
- 2024-12-09
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-09
AI Technical Summary
In the existing technology, when preparing continuous carbon fiber composite wires by melt method, there is a lack of effective impregnation device, which results in the molten organic matter not being able to uniformly coat the carbon fiber bundles. The impregnation degree is low and uneven, which affects the mechanical properties of the wires and makes them prone to breakage, making the preparation difficult.
A continuous carbon fiber composite wire impregnation preparation device was designed. A covering head is used to form a cavity with a gradually decreasing radial cross section. Molten organic matter is input through the feeding chamber. Combined with a heating mechanism and a screw extrusion mechanism, the molten organic matter is ensured to be uniformly impregnated into the carbon fiber bundle.
The high impregnation degree and uniformity of the composite wire are achieved, wire breakage is avoided, and the preparation efficiency and quality of the wire are improved.
Smart Images
Figure CN223486755U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a continuous carbon fiber composite wire impregnation preparation device and a wire harness wrapping machine, belonging to the field of wire impregnation technology. Background Technology
[0002] Carbon fiber and its composites are indispensable core materials in many fields such as aerospace, defense, and rail transportation. They possess advantages such as high strength, rigidity, wear resistance, high temperature resistance, and lightweight. Direct 3D printing using continuous carbon fiber composite resin materials is a novel processing technology developed in recent years. This technology not only greatly improves manufacturing efficiency and reduces production costs but also achieves high material utilization. 3D printing technology can flexibly produce continuous carbon fiber reinforced composite materials of various shapes and sizes. 3D printing of continuous fibers and organic material composite filaments generally employs two methods: solution method and melt method. Solution method involves dissolving the organic material, allowing the continuous fibers to pass through the solution, and then drying to achieve the composite effect. Since the solvent is generally a highly toxic organic compound, this method is hazardous and environmentally harmful. Melt method involves unfurling continuous fiber bundles and melting organic materials to achieve composite melting between the molten organic material and the continuous fibers.
[0003] In the continuous carbon fiber wire preparation process using the melt method, when the wire passes through molten organic matter, there is no mature and usable impregnation device. It is impossible to make the molten organic matter uniformly coat the carbon fiber bundle, let alone uniformly and fully impregnate the interior of the carbon fiber bundle. This results in low impregnation degree and poor impregnation uniformity of the obtained composite wire, leading to voids around and inside the fiber bundle, which seriously affects the mechanical properties of the wire. In addition, the wire is prone to breakage during the wire preparation process, making wire preparation difficult. Utility Model Content
[0004] The main objective of this invention is to provide a continuous carbon fiber composite wire impregnation preparation device and a wire harness wrapping machine to overcome the shortcomings of the prior art.
[0005] To achieve the aforementioned objectives, the technical solution adopted by this utility model includes:
[0006] The first aspect of this utility model provides a continuous carbon fiber composite wire impregnation preparation apparatus, comprising:
[0007] A wrapping head for continuous passage of wire, the wrapping head having a cavity and an inlet and an outlet communicating with the cavity, the cavity being at least for continuous passage of wire, the area of the radial cross section of the cavity gradually decreasing from the inlet to the outlet.
[0008] Furthermore, the covering head includes a first covering head and a second covering head, which are detachably connected and cover to form the cavity.
[0009] Furthermore, the cavity, the inlet, and the outlet are coaxially arranged.
[0010] Furthermore, the ratio of the area of the maximum radial section to the area of the minimum radial section of the cavity is 1.75. 2 :0.75 2 .
[0011] Furthermore, the radial cross-sectional area of the cavity gradually changes by 1.00%-1.36% per unit length from the inlet to the outlet, where the unit length is 1 mm.
[0012] Furthermore, the total length of the cavity is 60mm-80mm, the diameter of the inlet is 3.5mm-4.0mm, and the diameter of the outlet is 1.5mm-2.0mm.
[0013] Furthermore, the covering head also has a feeding chamber that communicates with the cavity, the feeding chamber being used at least to input molten organic matter into the cavity.
[0014] Furthermore, the central axis of the feeding chamber is perpendicular to the central axis of the cavity.
[0015] Furthermore, a heating mechanism is provided on the outer side of the covering head, which is used to heat the molten organic material in the cavity so as to keep the molten organic material in a molten state.
[0016] Furthermore, the heating mechanism includes an electrothermal element, a wire, and a terminal block. The electrothermal element is wound around the outside of the covering head, the terminal block is connected to the electrothermal element, and the wire is connected to the terminal block.
[0017] Furthermore, the electrothermal element has a ring-shaped structure, and the electrothermal element has an opening along its axial direction. Fixing plates are fixedly installed on both sides of the opening, and fixing bolts are connected between the fixing plates. The fixing bolts drive the electrothermal element to contract radially, which is used to fix the electrothermal element on the outside of the covering head.
[0018] Furthermore, a thermocouple is also provided on the covering head, which is used to measure the temperature of at least the first covering head and the second covering head.
[0019] Furthermore, the continuous carbon fiber composite wire impregnation preparation apparatus also includes a screw extrusion mechanism, which is connected to the feed chamber and is used to provide molten organic matter into the cavity.
[0020] A second aspect of this utility model provides a wire harness coating machine, including the aforementioned continuous carbon fiber composite wire impregnation preparation apparatus.
[0021] Compared with the prior art, the advantages of this utility model include:
[0022] 1. This utility model uses a cavity diameter that decreases from the inlet to the outlet to form a pressurized structure within the cavity. The three-way pressurized design connecting the feed cavity allows the fluid molten organic material to fully coat and impregnate the carbon fiber bundles within the cavity under pressure after entering the cavity from the feed cavity, thus obtaining composite wire. This ensures that the composite wire has a high degree of impregnation, good impregnation uniformity, and is not prone to wire breakage.
[0023] 2. The present invention is provided with a heating mechanism on the outside of the first and second covering heads to ensure that the temperature inside the feeding chamber and the mold cavity is constant at 0-400℃, so as to ensure that the molten organic material has sufficient fluidity when entering the feeding chamber, and further ensure that the molten organic material is evenly and thoroughly impregnated into the interior of the carbon fiber bundle. Attached Figure Description
[0024] To more clearly illustrate the technical solutions in the embodiments of this application 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 some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0025] Figure 1 A schematic diagram of the first coating head and the first angle of the second coating head of a continuous carbon fiber composite wire impregnation preparation device provided in a typical embodiment of this utility model;
[0026] Figure 2 A schematic diagram of the structure of the first coating head and the second coating head at a second angle of a continuous carbon fiber composite wire impregnation preparation device provided in a typical embodiment of this utility model;
[0027] Figure 3 A top view of the first and second coating heads of a continuous carbon fiber composite wire impregnation preparation device provided in a typical embodiment of this utility model;
[0028] Figure 4A cross-sectional view along direction A of the first and second coating heads of a continuous carbon fiber composite wire impregnation preparation device provided in a typical embodiment of this utility model.
[0029] Figure 5 This is a schematic diagram of the structure of a continuous carbon fiber composite wire impregnation preparation device from a first angle, provided in a typical embodiment of this utility model.
[0030] Figure 6 This is a schematic diagram of the structure of a continuous carbon fiber composite wire impregnation preparation device from a second angle, provided in a typical embodiment of this utility model.
[0031] Figure 7 A schematic diagram of the heating mechanism of a continuous carbon fiber composite wire impregnation preparation device is provided in another typical embodiment of this utility model.
[0032] Explanation of reference numerals in the attached figures:
[0033] 1. First covering head; 2. Second covering head; 3. Cavity; 4. Inlet; 5. Outlet; 6. Feeding chamber; 7. Heating mechanism; 8. Electrothermal heating element; 9. Wire; 10. Terminal block; 11. Opening; 12. Fixing plate; 13. Fixing bolt; 14. Thermocouple. Detailed Implementation
[0034] In view of the shortcomings of the prior art, the inventor of this case, through long-term research and extensive practice, has come up with the technical solution of this utility model. The following will further explain the technical solution, its implementation process, and its principles.
[0035] Example 1
[0036] like Figures 1-4The illustration shows a continuous carbon fiber composite wire impregnation preparation apparatus according to the first embodiment. It includes a first covering head 1 and a second covering head 2. At least a portion of the first covering head 1 and at least a portion of the second covering head 2 together form a cavity 3. The cavity 3 is used for the continuous passage of wire (i.e., carbon fiber bundles). An inlet 4 and an outlet 5 are formed at both ends of the cavity 3. The cavity 3, inlet 4, and outlet 5 are coaxially arranged, and the diameter of the cavity 3 decreases from the inlet 4 to the outlet 5. A feeding chamber 6 is provided on the first covering head 1, and the feeding chamber 6 is connected to the cavity 3. The feeding chamber 6 is responsible for injecting a fluid molten organic material into the cavity 3. When the molten organic material enters the cavity 3, it comes into contact with the carbon fiber bundles. The molten organic material fills the cavity 3 and coats the carbon fiber bundles. When the carbon fiber bundles pass through the cavity 3 from the inlet 4 to the outlet 5, the molten organic material... When the wire is threaded from the wire inlet 4 towards the wire outlet 5, the molten organic material surrounding the carbon fiber bundle moves towards the wire outlet 5 as the carbon fiber bundle is threaded. During this movement, the diameter of the cavity 3 continuously decreases, thereby applying pressure to the molten organic material in the direction of the carbon fiber bundle axis. This causes the molten organic material to fully wrap around and impregnate the interior of the carbon fiber bundle. Furthermore, since the cross-section of the cavity 3 at each axial position is a regular circle, the pressure applied by the inner wall of the cavity 3 to the molten organic material in the direction of the carbon fiber bundle axis is basically the same as the carbon fiber bundle moves towards the wire outlet 5. This ensures that the molten organic material can be uniformly impregnated into the interior of the carbon fiber bundle. The molten organic material achieves the wrapping and impregnation of the carbon fiber bundle inside the cavity 3, thereby obtaining a composite wire with a high degree of impregnation and good impregnation uniformity.
[0037] It should be noted that the first covering head 1 and the second covering head 2 are detachably connected and cover each other to form the cavity 3. The connection method between the first covering head 1 and the second covering head 2 includes, but is not limited to, using connecting bolts. In this embodiment, four connecting bolts are used to connect the first covering head 1 and the second covering head 2. In this embodiment, during the threading process of the carbon fiber bundle, the axis of the carbon fiber bundle always coincides with the axis of the cavity 3, that is, to avoid wear between the carbon fiber bundle and the inner wall of the cavity 3 during the threading process.
[0038] Furthermore, this embodiment also limits the moving speed of the carbon fiber bundle inside the cavity 3, specifically to uniform movement, and ensures that the impregnation speed of the carbon fiber bundle in the cavity 3 is 0.5-2 m / min. The degree of impregnation of the wire will be affected by different impregnation speeds. The slower the speed, the higher the degree of impregnation and the better the impregnation effect. The optimal impregnation speed is 0.5 m / min. This specification of the impregnation speed of the carbon fiber bundle can ensure the maximum degree of impregnation of the carbon fiber bundle, and finally obtain a high-quality composite wire with a high degree of impregnation.
[0039] For example, the total length of cavity 3 is 60mm, the diameter of inlet 4 is 3.5mm, the diameter of outlet 5 is 1.5mm, and the feeding chamber 6 is set perpendicular to cavity 3. The length and diameter settings here are adapted to the carbon fiber bundle to be impregnated in this embodiment, and can ensure that the molten organic matter can be impregnated into the interior of the carbon fiber bundle to the greatest extent during the movement of the carbon fiber bundle. In addition, the appropriate size design of cavity 3 ensures uniform coating of the wire while preventing excess material from flowing out and avoiding waste of raw materials. Furthermore, the dimensions of other cavities 3, inlet 4 and outlet 5 that can ensure uniform impregnation are also within the protection scope of this utility model.
[0040] Example 2
[0041] like Figure 5-Figure 7 The diagram shows a continuous carbon fiber composite wire impregnation preparation apparatus according to the second embodiment. The structure of the continuous carbon fiber composite wire impregnation preparation apparatus in this embodiment is basically the same as that in the first embodiment. The difference from the first embodiment is that this embodiment also includes a heating mechanism 7, which is located outside the first covering head 1 and the second covering head 2. It should be noted that the fluidity of molten organic matter is not the same at different temperatures, and the change in fluidity will inevitably affect the impregnation of carbon fiber bundles by molten organic matter. Therefore, this embodiment additionally sets a heating mechanism 7 to control the temperature of the feeding chamber 6 and the cavity 3. The temperature can be set to 0-400℃, that is, 0-400℃ is the process temperature range for the impregnation of carbon fiber bundles, and the optimal process temperature is 240℃. When the temperature is stable, the molten organic matter is in the flow state with the highest impregnation efficiency. The molten organic matter enters the cavity 3 through the feeding chamber 6. Under the pressure generated by the inner wall of the cavity 3 when it moves in the cavity 3, the molten organic matter with good flow state can achieve efficient and uniform impregnation into the interior of the carbon fiber bundle.
[0042] Specifically, the heating mechanism 7 includes an electrothermal element 8, a wire 9, and a terminal block 10. The electrothermal element 8 is wound around the outside of the first covering head 1 and the second covering head 2. The electrothermal element 8 has a ring-shaped structure and an opening 11 along its axial direction. Fixing plates 12 are fixedly installed on both sides of the opening 11, and fixing bolts 13 are connected between the fixing plates 12. The fixing bolts 13 drive the electrothermal element 8 to contract radially, thereby fixing the electrothermal element 8 to the outside of the first covering head 1 and the second covering head 2. The terminal block 10 is connected to the electrothermal element 8, and the wire 9 is connected to the terminal block 10. Electrical energy is transmitted to the terminal block 10 through the wire 9, and the terminal block 10 transmits electrical energy to the electrothermal element 8. The electrothermal element 8 heats up, thereby heating the first covering head 1 and the second covering head 2, further adjusting the temperature inside the cavity 3 and the feeding cavity 6, and maintaining the temperature at the optimal process temperature of 240°C.
[0043] Specifically, thermocouples 14 are also provided on the first covering head 1 and the second covering head 2. The thermocouples 14 are used to measure the temperature on the first covering head 1 and the second covering head 2.
[0044] Specifically, the continuous carbon fiber composite wire impregnation preparation device in this embodiment also includes a single-screw extrusion mechanism. The single-screw extrusion mechanism is connected to the feed chamber 6. The single-screw extrusion mechanism is used to extrude the molten organic matter in the feed chamber 6 into the cavity 3. The single-screw extruder is used to form a fluid molten organic matter masterbatch. After passing through the single-screw extruder, the molten organic matter masterbatch becomes molten (i.e., a fluid molten organic matter) and is extruded at a uniform speed into the feed chamber 6. In other words, the parameters of the single-screw extruder are adjustable. By adjusting the parameters of the single-screw extruder, the feeding speed remains constant when the molten organic matter is fed into the feed chamber 6.
[0045] It should be understood that the above embodiments are merely illustrative of the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.
Claims
1. A continuous carbon fiber composite wire impregnation preparation apparatus, characterized in that, include: A covering head for continuous passage of wires, the covering head having a cavity (3) and an inlet (4) and an outlet (5) communicating with the cavity (3), the cavity (3) being at least for continuous passage of wires, the area of the radial cross section of the cavity (3) gradually decreasing from the inlet (4) to the outlet (5).
2. The continuous carbon fiber composite wire impregnation preparation apparatus according to claim 1, characterized in that, The covering head includes a first covering head (1) and a second covering head (2), which are detachably connected and cover to form the cavity (3); And / or, the cavity (3), the inlet (4) and the outlet (5) are coaxially arranged.
3. The continuous carbon fiber composite wire impregnation preparation apparatus according to claim 1, characterized in that, The ratio of the area of the maximum radial section to the area of the minimum radial section of the cavity (3) is 1.
75. 2 :0.75 2 ; And / or, the radial cross-sectional area of the cavity (3) varies by an amplitude of 1.00%-1.36% per unit length from the inlet (4) to the outlet (5).
4. The continuous carbon fiber composite wire impregnation preparation apparatus according to claim 1, characterized in that, The cavity (3) has a total length of 60mm-80mm, the inlet (4) has a diameter of 3.5mm-4.0mm, and the outlet (5) has a diameter of 1.5mm-2.0mm.
5. The continuous carbon fiber composite wire impregnation preparation apparatus according to claim 1, characterized in that, The covering head also has a feeding chamber (6) that communicates with the cavity (3), and the feeding chamber (6) is used at least to input molten organic matter into the cavity (3); And / or, the central axis of the feed chamber (6) is perpendicular to the central axis of the cavity (3).
6. The continuous carbon fiber composite wire impregnation preparation apparatus according to claim 1, characterized in that, A heating mechanism (7) is provided on the outside of the covering head. The heating mechanism (7) is used to heat the molten organic matter in the cavity (3) so that the molten organic matter remains in a molten state.
7. The continuous carbon fiber composite wire impregnation preparation apparatus according to claim 6, characterized in that, The heating mechanism (7) includes an electrothermal element (8), a wire (9) and a terminal (10). The electrothermal element (8) is wrapped around the outside of the covering head. The terminal (10) is connected to the electrothermal element (8), and the wire (9) is connected to the terminal (10). And / or, the electrothermal element (8) has a ring-shaped structure, and the electrothermal element (8) has an opening (11) along its axial direction. Fixing plates (12) are fixedly provided on both sides of the opening (11), and fixing bolts (13) are connected between the fixing plates (12). The fixing bolts (13) drive the electrothermal element (8) to contract radially, so as to fix the electrothermal element (8) on the outside of the covering head.
8. The continuous carbon fiber composite wire impregnation preparation apparatus according to claim 2, characterized in that, The covering head is also provided with a thermocouple (14), which is used to measure the temperature of the first covering head (1) and the second covering head (2).
9. The continuous carbon fiber composite wire impregnation preparation apparatus according to claim 5, characterized in that, The continuous carbon fiber composite wire impregnation preparation device also includes a screw extrusion mechanism, which is connected to the feed chamber (6) and is used to provide molten organic matter into the cavity (3).
10. A wire harness coating machine, characterized in that, include: The continuous carbon fiber composite wire impregnation preparation apparatus according to any one of claims 1-9.