Carbon fiber impregnation and curing combined equipment

Abstract

The utility model relates to carbon fiber manufacturing technical field especially is a kind of carbon fiber impregnation curing combined equipment.The impregnation device, primary heating curing device, secondary heating curing device are sequentially fixed in machine table along carbon fiber silk processing direction, realize impregnation, primary low-temperature curing, secondary high-temperature curing continuous operation.Wherein, primary heating curing device includes base, heating mould, position adjusting assembly and pressure locking assembly.Base is based on machine table.Heating mould is placed in base, and the upper surface is provided with silk passage.Position adjusting assembly and pressure locking assembly are installed based on base.Position adjusting assembly is used to drive heating mould to approach / close to carbon fiber silk conveying path, to adapt to different rigid tow: for small K number tow, heating mould approaches carbon fiber silk conveying path to reduce friction, for large K number tow, heating mould is far away from carbon fiber silk conveying path to prevent the occurrence of inlet jamming phenomenon.

Description

Technical Field

[0001] This utility model relates to the field of carbon fiber manufacturing technology, and in particular to a carbon fiber impregnation and curing combined equipment. Background Technology

[0002] In the industrial production of carbon fiber composite products, the impregnation and curing combined equipment achieves continuous production through a series of impregnation devices, primary heating and curing devices, and secondary heating and curing devices. Among them, the heating mold of the primary heating and curing device is the core component. The threading channel on the heating mold must be matched with the direction of carbon fiber filament transport to ensure that the filament bundle is smoothly threaded after impregnation. The fit between the threading channel and the filament bundle directly affects the semi-cured quality: if the threading channel is significantly tilted relative to the direction of carbon fiber transport, the carbon fiber bundle is prone to local friction with the inner wall of the threading channel during threading, leading to fiber breakage or scraping and loss of adhesive. Currently, in the industry, the diameter of the threading channel is usually preset according to "the maximum diameter of the filament bundle + the basic gap," and the mold adopts a fixed installation structure, which can only maintain the initial tilt angle (the angle between the mold and the direction of filament bundle delivery is fixed) and cannot adjust the tilt. However, the filament bundle rigidity varies with different K-number carbon fiber filaments. Small K-number filament bundles are less rigid, and if the channel tilt is fixed, local friction is easily generated during threading due to angle deviation; large K-number filament bundles are more rigid, and a fixed tilt may cause jamming at the inlet end. Therefore, it is urgent for technical personnel to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide a combined carbon fiber impregnation and curing device, which aims to solve the problem that the heating mold of the existing primary heating and curing device adopts a fixed installation structure and the inability to adjust the tilt angle between the wire threading channel and the carbon fiber conveying direction, resulting in the inability to adapt to the rigidity differences of carbon fiber bundles with different K numbers.

[0004] This utility model relates to a combined carbon fiber impregnation and curing equipment, including a machine base, an impregnation device, a primary heating and curing device, and a secondary heating and curing device. The impregnation device, the primary heating and curing device, and the secondary heating and curing device are sequentially fixed to the machine base along the carbon fiber processing direction, jointly realizing the continuous operation of carbon fiber impregnation, primary low-temperature curing, and secondary high-temperature curing processes. The primary heating and curing device includes a base, a heating mold, a position adjustment component, and a pressure locking component. The base is mounted on the machine base. The heating mold is placed on the base and has a wire-passing channel. The position adjustment component is used to drive the heating mold to move in a direction close to or away from the carbon fiber conveying path, while the pressure locking component is used to apply downward pressure to the adjusted heating mold and lock its position. Both are mounted on the base.

[0005] As a further improvement to the technical solution disclosed in this utility model, the position adjustment component comprises an upstream front position adjustment sub-component, an upstream rear position adjustment sub-component, a downstream front position adjustment sub-component, and a downstream rear position adjustment sub-component; the upstream front position adjustment sub-component, the upstream rear position adjustment sub-component, the downstream front position adjustment sub-component, and the downstream rear position adjustment sub-component all form a fixed engagement relationship with the base; along the direction perpendicular to the carbon fiber filament conveying path, the upstream front position adjustment sub-component and the upstream rear position adjustment sub-component are aligned and distributed, and the two cooperate to apply force to the upstream sidewall of the heating mold; along the direction perpendicular to the carbon fiber filament conveying path, the downstream front position adjustment sub-component and the downstream rear position adjustment sub-component are aligned and distributed, and the two cooperate to apply force to the downstream sidewall of the heating mold.

[0006] As a further improvement to the technical solution disclosed in this utility model, the upstream front position adjustment sub-assembly, the upstream rear position adjustment sub-assembly, the downstream front position adjustment sub-assembly, and the downstream rear position adjustment sub-assembly have the same design structure; the upstream front position adjustment sub-assembly includes a U-shaped part, a locking bolt, and a side-top adjustment bolt; the U-shaped part is clamped on the base and its position is locked by the locking bolt; the side-top adjustment bolt passes through the U-shaped part, its axial direction is perpendicular to the carbon fiber filament conveying path, and its free end forms an abutting fit with the side wall of the heating mold.

[0007] As a further improvement of the technical solution disclosed in this utility model, the pressure locking assembly consists of an upstream pressure locking sub-assembly and a downstream pressure locking sub-assembly; both the upstream pressure locking sub-assembly and the downstream pressure locking sub-assembly are mounted on the base and arranged sequentially along the carbon fiber conveying path, respectively acting on the upstream and downstream areas of the heating mold.

[0008] As a further improvement to the technical solution disclosed in this utility model, the upstream pressure locking sub-assembly and the downstream pressure locking sub-assembly have the same design structure; the upstream pressure locking sub-assembly includes a front screw, a rear screw, a front nut, a rear nut, and a pressure beam; the front screw and the rear screw are both vertically fixed on the base and are arranged at intervals along a direction perpendicular to the carbon fiber conveying path, together providing installation support for the pressure beam; the two ends of the pressure beam are respectively provided with a front through hole and a rear through hole; the pressure beam is sleeved on the front screw through the front through hole and on the rear screw through the rear through hole; the front nut is sleeved on the front screw and the rear nut is sleeved on the rear screw; when the heating mold is adjusted to the target position, the front nut and the rear nut are screwed on, together pushing the pressure beam downward to apply heating to the mold.

[0009] As a further improvement to the technical solution disclosed in this utility model, the impregnation device includes an impregnation tank, a yarn guide roller assembly, an impregnation roller assembly, and an extrusion roller assembly; the impregnation tank is used to contain the impregnation adhesive; the yarn guide roller assembly, the impregnation roller assembly, and the extrusion roller assembly are arranged sequentially along the carbon fiber filament conveying direction, and all are mounted on the impregnation tank; the extrusion roller assembly includes an upper extrusion roller and a lower extrusion roller, which work together to extrude the impregnated carbon fiber filaments to remove excess adhesive.

[0010] As a further improvement to the technical solution disclosed in this utility model, the secondary heating and curing device is an oven.

[0011] In practical applications, the carbon fiber impregnation and curing combined equipment disclosed in this utility model can achieve at least the following beneficial technical effects, specifically: 1) By using a position adjustment component to precisely adjust the relative position of the heating mold and the conveying path, it is possible to adapt the processing of filaments with different rigidity. Specifically, for small K-number filaments with weak rigidity, the position adjustment component drives the heating mold to move closer to the carbon fiber conveying path to reduce the angular deviation between the heating mold threading channel and the filament conveying direction, thereby effectively reducing local friction between the filament and the inner wall of the threading channel during the threading process; for large K-number filaments with strong rigidity, the position adjustment component drives the heating mold to move away from the carbon fiber conveying path to expand the adaptation space between the threading channel entrance and the filament, thereby effectively avoiding the occurrence of entrance end jamming caused by the strong rigidity and wide cross-section of the filament. 2) Multi-specification filament tow can be adapted without stopping the machine to change the heating mold, and the continuous production efficiency of the carbon fiber impregnation and curing combined equipment is significantly improved; 3) After the heating mold is adjusted into place, the pressure locking component applies downward pressure and locks its position to ensure that the heating mold will not shift due to factors such as equipment vibration and filament conveying force during the low-temperature curing process. This maintains the relative position stability between the heating mold and the conveying path, thereby avoiding secondary friction damage to the filament caused by dynamic deviation. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional schematic diagram of the carbon fiber impregnation and curing combined equipment disclosed in this utility model.

[0014] Figure 2This is a three-dimensional schematic diagram of the impregnation device in the carbon fiber impregnation and curing combined equipment disclosed in this utility model.

[0015] Figure 3 This is a three-dimensional schematic diagram of the primary heating and curing device in the carbon fiber impregnation and curing combined equipment disclosed in this utility model.

[0016] Figure 4 This is a three-dimensional schematic diagram from another perspective of the primary heating and curing device in the carbon fiber impregnation and curing combined equipment disclosed in this utility model.

[0017] Figure 5 This is a three-dimensional schematic diagram of the upstream front position adjustment sub-component in the carbon fiber impregnation and curing combined equipment disclosed in this utility model.

[0018] Figure 6 This is a three-dimensional schematic diagram of the upstream pressure locking component in the carbon fiber impregnation and curing combined equipment disclosed in this utility model.

[0019] 1-Machine base; 2-Glue dipping device; 21-Glue tank; 22-Yarn guide roller assembly; 23-Glue dipping roller assembly; 24-Glue extrusion roller assembly; 241-Upper extrusion roller; 242-Lower extrusion roller; 3-Primary heating and curing device; 31-Base; 32-Heating mold; 321-Threading channel; 33-Position adjustment assembly; 331-Upstream front position adjustment sub-assembly; 3311-U-shaped part; 3312-Locking bolt; 3313-Side Top adjustment bolt; 332 - Upstream rear position adjustment sub-assembly; 333 - Downstream front position adjustment sub-assembly; 334 - Downstream rear position adjustment sub-assembly; 34 - Pressure locking assembly; 341 - Upstream pressure locking sub-assembly; 3411 - Front screw; 3412 - Rear screw; 3413 - Front nut; 3414 - Rear nut; 3415 - Pressure beam; 342 - Downstream pressure locking sub-assembly; 4 - Secondary heating and curing device. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments. Figure 1 A three-dimensional schematic diagram of the carbon fiber impregnation and curing combined equipment disclosed in this utility model is shown. It can be seen that it mainly consists of a machine base 1, an impregnation device 2, a primary heating and curing device 3, and a secondary heating and curing device 4. The impregnation device 2, the primary heating and curing device 3, and the secondary heating and curing device 4 are arranged sequentially along the carbon fiber processing direction to collaboratively achieve impregnation, primary low-temperature curing, and secondary high-temperature curing of the carbon fiber. All three are fixedly installed on the machine base 1. This ensures precise connection between the impregnation process, the primary low-temperature curing process, and the secondary high-temperature curing process, laying a good foundation for improving the processing efficiency of carbon fiber impregnation and curing. like Figure 2As shown, the impregnation device 2, as the core component of the carbon fiber impregnation process, mainly consists of several parts, including an impregnation tank 21, a guide roller assembly 22, an impregnation roller assembly 23, and an extrusion roller assembly 24. The impregnation tank 21 is used to hold the impregnation solution, providing the raw material base for the impregnation operation. The guide roller assembly 22, the impregnation roller assembly 23, and the extrusion roller assembly 24 are arranged sequentially along the carbon fiber conveying direction, and all are mounted on the impregnation tank 21, forming a continuous impregnation process path. The yarn guide roller assembly 22 guides and conveys the carbon fiber filaments, ensuring that the filament bundle enters the impregnation area smoothly. The impregnation roller assembly 23 presses the carbon fiber filaments fully into the adhesive in the adhesive tank 21, ensuring that the filament bundle is uniformly impregnated. The extrusion roller assembly 24 includes an upper extrusion roller 241 and a lower extrusion roller 242 aligned along the height direction. The two work together to extrude the impregnated carbon fiber filaments, thereby removing excess adhesive from the surface of the filament bundle, avoiding adhesive waste and quality defects in the subsequent curing process, and ensuring the quality of impregnation from the structural design. like Figure 3 , Figure 4 As shown, the primary heat curing device 3 mainly consists of a base 31, a heating mold 32, a position adjustment component 33, and a pressure locking component 34. The base 31, using the machine platform 1 as its mounting base, provides stable support for the entire primary heat curing device 3. The heating mold 32 rests on the base 31 and has a threading channel 321 for passing carbon fiber filaments. The heating mold 32 can achieve constant temperature control through its built-in heating element, providing a low-temperature curing environment for the filament bundle. Both the position adjustment component 33 and the pressure locking component 34 use the base 31 as their mounting base. The position adjustment component 33 drives the heating mold 32 to move closer to or further away from the carbon fiber filament conveying path to accommodate carbon fiber filament bundles of different specifications. The pressure locking component 34 applies downward pressure to the adjusted heating mold 32 and locks its position, preventing the heating mold 32 from shifting during operation. Similarly, Figure 3 , Figure 4As shown, the position adjustment component 33 plays a crucial role in precisely adjusting the position of the heating mold 32. It consists of an upstream front position adjustment sub-component 331, an upstream rear position adjustment sub-component 332, a downstream front position adjustment sub-component 333, and a downstream rear position adjustment sub-component 334. All four sub-components—upstream front position adjustment sub-component 331, upstream rear position adjustment sub-component 332, downstream front position adjustment sub-component 333, and downstream rear position adjustment sub-component 334—are fixedly engaged with the base 31 to ensure stability during the adjustment process. Along the direction perpendicular to the carbon fiber filament conveying path, the upstream front position adjustment sub-assembly 331 and the upstream rear position adjustment sub-assembly 332 are aligned and work together to apply force to the upstream sidewall of the heating mold 32, thereby adjusting the position of the upstream end of the heating mold 32. Similarly, along the same direction, the downstream front position adjustment sub-assembly 333 and the downstream rear position adjustment sub-assembly 334 are aligned and work together to apply force to the downstream sidewall of the heating mold 32, thereby adjusting the position of the downstream end of the heating mold 32. Through the coordinated action of these four sub-assemblies, the relative position adjustment and precise positioning of the heating mold 32 on the horizontal plane can be achieved, meeting the processing requirements of filament bundles of different specifications. It is also necessary to further explain here, just as Figure 3 , Figure 4 As shown, the upstream front position adjustment sub-component 331, the upstream rear position adjustment sub-component 332, the downstream front position adjustment sub-component 333, and the downstream rear position adjustment sub-component 334 have the same design structure. Figure 5 As shown, taking the upstream front position adjustment sub-assembly 331 as an example, it includes a U-shaped component 3311, a locking bolt 3312, and a side-top adjustment bolt 3313. The U-shaped component 3311 is snapped onto the base 31 and is locked in position by the locking bolt 3312 to ensure its stability. The side-top adjustment bolt 3313 passes through the U-shaped component 3311, its axis is perpendicular to the carbon fiber conveying path, and its free end forms an abutting fit with the side wall of the heating mold 32. In actual adjustment, by turning the side-top adjustment bolt 3313, the heating mold 32 can be moved in a direction perpendicular to the conveying path. It has high adjustment accuracy, is easy to operate, and effectively adapts to the processing of carbon fiber bundles with different rigidities and cross-sectional sizes. Similarly, Figure 3 , Figure 4As shown, the pressure-locking assembly 34, as an important structure to ensure the working stability of the heating mold 32, consists of an upstream pressure-locking sub-assembly 341 and a downstream pressure-locking sub-assembly 342. Both the upstream and downstream pressure-locking sub-assemblies 341 and 342 are mounted on the base 31 and arranged sequentially along the carbon fiber conveying path. They respectively act on the upstream and downstream regions of the heating mold 32, achieving uniform pressure and comprehensive locking of the heating mold 32, preventing displacement of the heating mold 32 due to uneven local force. Furthermore, the upstream and downstream pressure-locking sub-assemblies 341 and 342 have the same design structure.

[0021] like Figure 6 As shown, taking the upstream pressure locking sub-assembly 341 as an example, it includes a front screw 3411, a rear screw 3412, a front nut 3413, a rear nut 3414, and a pressure beam 3415. The front screw 3411 and the rear screw 3412 are both vertically fixed to the base 31 and are spaced apart along a direction perpendicular to the carbon fiber conveying path, jointly providing installation support for the pressure beam 3415. The pressure beam 3415 has a front through hole and a rear through hole at its two ends, respectively. The pressure beam 3415 is fitted onto the front screw 3411 through the front through hole and onto the rear screw 3412 through the rear through hole, allowing it to move up and down along the screw axis. The front nut 3413 is fitted onto the front screw 3411, and the rear nut 3414 is fitted onto the rear screw 3412; by tightening the nuts, the pressure beam 3415 can be moved. After the heating mold 32 is adjusted to the target position, the front nut 3413 and the rear nut 3414 are screwed on to push the pressure beam 3415 downward, so that the pressure beam 3415 is tightly pressed against the top of the heating mold 32, thereby locking the position of the heating mold 32 and ensuring that the heating mold 32 will not shift due to equipment vibration or other factors during the low-temperature curing process, and maintaining the relative position stability of the heating mold 32 and the conveying path. As a further optimization of the technical solution disclosed in this utility model, just as Figure 1 As shown, the secondary heating and curing device 4 adopts an oven structure. The oven is equipped with a constant temperature heating system and a hot air circulation system, which can achieve a uniform high-temperature curing environment, ensuring that the carbon fiber tows, after a first low-temperature pre-curing, can be fully cured, thus improving the product's mechanical properties. Simultaneously, the oven's inlet and outlet are equipped with sealing structures, which can effectively maintain stable internal temperature, reduce heat loss, and lower energy consumption. During operation, carbon fiber filaments are first guided and conveyed by the yarn guide roller assembly 22 into the glue tank 21, where they are fully impregnated with glue under the action of the glue impregnation roller assembly 23. Subsequently, the impregnated carbon fiber filaments are squeezed by the upper extrusion roller 241 and the lower extrusion roller 242 to remove excess glue. Next, the filament bundle enters the threading channel 321 of the heating mold 32. According to the specifications of the filament bundle, the relative position of the heating mold 32 is precisely adjusted by the upstream front position adjustment sub-assembly 331, the upstream rear position adjustment sub-assembly 332, the downstream front position adjustment sub-assembly 333, and the downstream rear position adjustment sub-assembly 334. After the adjustment is completed, the heating mold 32 is locked by the upstream pressure locking sub-assembly 341 and the downstream pressure locking sub-assembly 342. The heating mold 32 then starts the heating function to perform a low-temperature curing of the filament bundle. After the first curing is completed, the filament bundle enters the secondary heating curing device 4 (oven) for a second high-temperature curing, ultimately forming a qualified carbon fiber product. The entire process is seamless, with impregnation, primary curing, and secondary curing working in parallel, effectively improving the efficiency and quality of carbon fiber impregnation and curing. It is also important to emphasize that, thanks to the precise adjustment function of the position adjustment component 33, it is possible to adapt and process filaments of different rigidities: For small-K-number filaments, the position adjustment component 33 drives the heating mold 32 to move closer to the carbon fiber filament conveying path, thereby reducing the angular deviation between the threading channel 321 of the heating mold 32 and the filament conveying direction, effectively reducing local friction between the filament and the inner wall of the threading channel 321 during threading; for large-K-number filaments, the position adjustment component 33 drives the heating mold 32 to move further away from the carbon fiber filament conveying path, thereby expanding the adaptation space between the inlet end of the threading channel 321 and the filament, effectively avoiding the phenomenon of inlet end jamming caused by the high rigidity and wide cross-section of the filament. Furthermore, multi-specification filament adaptation can be completed without stopping the machine to replace the heating mold 32, significantly improving the continuous production efficiency of the carbon fiber impregnation and curing combined equipment. The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A carbon fiber impregnation and curing combined equipment, comprising a machine base, an impregnation device, a primary heating and curing device, and a secondary heating and curing device; wherein the impregnation device, the primary heating and curing device, and the secondary heating and curing device are sequentially fixed to the machine base along the carbon fiber processing direction, jointly realizing the continuous operation of the carbon fiber impregnation, primary low-temperature curing, and secondary high-temperature curing processes, characterized in that, The primary heating and curing device includes a base, a heating mold, a position adjustment component, and a pressure locking component. The base is mounted on the machine platform. The heating mold is placed on the base and has a threading channel. The position adjustment component is used to drive the heating mold to move in a direction close to or away from the carbon fiber filament conveying path, while the pressure locking component is used to apply downward pressure to the adjusted heating mold and lock its position. Both components are mounted on the base.

2. The carbon fiber impregnation and curing combined equipment according to claim 1, characterized in that, The position adjustment assembly comprises an upstream front position adjustment sub-assembly, an upstream rear position adjustment sub-assembly, a downstream front position adjustment sub-assembly, and a downstream rear position adjustment sub-assembly. Each of these sub-assemblies is fixedly fitted to the base. Along the direction perpendicular to the carbon fiber conveying path, the upstream front position adjustment sub-assembly and the upstream rear position adjustment sub-assembly are aligned, working together to apply force to the upstream sidewall of the heating mold. Similarly, along the same direction, the downstream front position adjustment sub-assembly and the downstream rear position adjustment sub-assembly are aligned, working together to apply force to the downstream sidewall of the heating mold.

3. The carbon fiber impregnation and curing combined equipment according to claim 2, characterized in that, The upstream front position adjustment sub-assembly, the upstream rear position adjustment sub-assembly, the downstream front position adjustment sub-assembly, and the downstream rear position adjustment sub-assembly have the same design structure; the upstream front position adjustment sub-assembly includes a U-shaped component, a locking bolt, and a side-top adjustment bolt; the U-shaped component is snapped onto the base and its position is locked by the locking bolt; the side-top adjustment bolt passes through the U-shaped component, its axial direction is perpendicular to the carbon fiber conveying path, and its free end forms an abutting fit with the side wall of the heating mold.

4. The carbon fiber impregnation and curing combined equipment according to claim 1, characterized in that, The pressure-locking assembly consists of an upstream pressure-locking sub-assembly and a downstream pressure-locking sub-assembly. Both the upstream and downstream pressure-locking sub-assemblies are mounted on the base and are arranged sequentially along the carbon fiber conveying path, respectively acting on the upstream and downstream regions of the heating mold.

5. The carbon fiber impregnation and curing combined equipment according to claim 4, characterized in that, The upstream pressure locking sub-assembly and the downstream pressure locking sub-assembly have the same design structure; the upstream pressure locking sub-assembly includes a front screw, a rear screw, a front nut, a rear nut, and a pressure beam; the front screw and the rear screw are both vertically fixed on the base and are arranged at intervals along a direction perpendicular to the carbon fiber conveying path, together providing installation support for the pressure beam; the two ends of the pressure beam are respectively provided with a front through hole and a rear through hole; the pressure beam is sleeved on the front screw through the front through hole and on the rear screw through the rear through hole; the front nut is sleeved on the front screw and the rear nut is sleeved on the rear screw; when the heating mold is adjusted to the target position, the front nut and the rear nut are screwed on, together pushing the pressure beam downward to apply the heating mold.

6. The carbon fiber impregnation and curing combined equipment according to any one of claims 1-5, characterized in that, The impregnation device includes an impregnation tank, a yarn guide roller assembly, an impregnation roller assembly, and an extrusion roller assembly. The impregnation tank is used to contain the impregnation adhesive. The yarn guide roller assembly, the impregnation roller assembly, and the extrusion roller assembly are arranged sequentially along the carbon fiber filament conveying direction, and all are mounted on the impregnation tank. The extrusion roller assembly includes an upper extrusion roller and a lower extrusion roller, which work together to squeeze the impregnated carbon fiber filaments to remove excess adhesive.

7. The carbon fiber impregnation and curing combined equipment according to any one of claims 1-5, characterized in that, The secondary heating and curing device is an oven.

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