Dipping equipment for preparing thermoplastic carbon fiber prepreg
By designing an impregnation device including an oven, a roller, a tension adjustment mechanism, a double-roll rolling calender, a laser heating device and a wind knife cooling device, the problem of slow heating of thermoplastic resin in the prior art is solved, and efficient temperature regulation and high-quality molding of carbon fiber prepreg are achieved.
Patent Information
- Application Number
- CN202421862198.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-02
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-08-02
AI Technical Summary
In the prior art, when preparing carbon fiber prepregs, the heating rate of the thermoplastic resin is slow, and the control is insufficient, making it difficult to achieve precise temperature regulation.
An impregnation device including an oven, a roller, a tension adjustment mechanism, a double-roll calendering device, a laser heating device and a wind knife cooling device is designed. Through the steps of oven preheating, tension adjustment, laser heating and double-roll calendering, efficient heating and impregnation of the thermoplastic resin is achieved.
The equipment can quickly and accurately regulate the temperature, improve the melting speed and impregnation effect of the thermoplastic resin, and improve the molding quality and production efficiency of carbon fiber prepregs.
Smart Images
Figure CN222832156U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of carbon fiber prepreg production and manufacturing, and in particular provides an impregnation device for preparing thermoplastic carbon fiber prepreg. Background Art
[0002] Continuous fiber reinforced thermoplastic composites (such as carbon fiber) have the advantages of low density, strong toughness, corrosion resistance, fatigue resistance, etc. Therefore, they are widely used in aerospace, automobile, energy, medical and other fields.
[0003] In the process of preparing carbon fiber prepreg, the thermoplastic resin needs to be heated. During the heating process, when the glass transition temperature of the resin is reached, the thermoplastic resin will change from a solid state to a solid non-crystalline state (called a glass state). When the temperature continues to rise to the melting temperature of the thermoplastic resin, the resin will change from a solid non-crystalline state to a liquid state. After that, the carbon fiber prepreg is calendered to achieve the final molding of the carbon fiber prepreg.
[0004] In the prior art, a single method is usually used to heat the resin, which has a slow heating speed and poor controllability.
[0005] Therefore, it becomes an urgent problem to propose a new impregnation equipment for preparing thermoplastic carbon fiber prepreg to facilitate temperature control. Utility Model Content
[0006] The utility model aims to provide an impregnation device for preparing thermoplastic carbon fiber prepreg to solve the problems existing in the prior art.
[0007] In order to achieve the above-mentioned purpose, the utility model provides an impregnation device for preparing thermoplastic carbon fiber prepreg, comprising: an oven, a roller, a tension adjustment mechanism, a double-roll calendering device, a laser heating device and a wind knife cooling device, wherein a feed port is arranged at the front end of the oven, and a discharge port is arranged at the rear end, the roller is arranged at the front end of the feed port, the tension adjustment mechanism is arranged in the oven, and is used to adjust the tension of the prepreg passing through the oven, the double-roll calendering device is arranged at the rear end of the discharge port, and is used to calender the prepreg, the laser heating device is arranged at the front end of the double-roll calendering device, and is used to assist in heating the prepreg entering the double-roll calendering device, and the wind knife cooling device is arranged at the rear end of the double-roll calendering device, and is used to cool the prepreg output from the double-roll calendering device.
[0008] Preferably, the oven is a tunnel type oven, comprising an oven frame, an oven upper cover and an oven lower cover, wherein the oven lower cover is fixed above the oven frame, the oven upper cover is hinged above the oven lower cover, and the oven upper cover is provided with exhaust holes.
[0009] Further preferably, the roller is installed at the feed inlet of the oven through a roller bracket and the height of the roller is adjustable.
[0010] Further preferably, the tension adjustment mechanism includes a tensioning roller, a tensioning roller bracket, a seat bearing and a rotary drive device, wherein there are two tensioning rollers, and the two tensioning rollers are installed in parallel and at intervals between the two tensioning roller brackets, wherein one tensioning roller bracket is connected to one side of the oven through the seat bearing, and the other tensioning roller bracket is connected to the rotary drive device, and the rotary drive device is fixed to the other side of the oven.
[0011] Further preferably, the double-roll calendering device includes a double-roll bracket, a first calendering roller, a second calendering roller and a clamping drive device, wherein the first calendering roller and the second calendering roller are both installed on the double-roll bracket and the second calendering roller is located above the first calendering roller, and the mounting seats at both ends of the second calendering roller are respectively connected to the clamping drive device one by one and can be moved up and down along the double-roll bracket under the drive of the clamping drive device to adjust the degree of clamping between the first calendering roller and the second calendering roller.
[0012] Further preferably, a servo motor is installed on one side of the first calendering roller and a heater is installed on the other side of the second calendering roller.
[0013] Further preferably, the twin-roll calendering device also includes a calendering frame, two guide rails are spaced apart above the calendering frame, the twin-roller bracket is slidably mounted on the guide rails through a slider, a three-phase asynchronous motor is fixedly mounted on the calendering frame, the three-phase asynchronous motor is connected to a lead screw through a right-angle reducer, a traction bracket is fixedly mounted below the twin-roller bracket, the lead screw is connected to a lead screw nut fixed on the traction bracket, and is used to drive the traction bracket and the twin-roller bracket to move under the drive of the three-phase asynchronous motor.
[0014] Further preferably, the laser heating device is a three-degree-of-freedom position adjustable structure.
[0015] Further preferably, a discharge extension end is provided at the rear end of the oven, and the laser heating device is in two sets and is respectively provided above and below the discharge extension end.
[0016] Further preferably, the wind knife cooling device comprises a wind knife bracket and a wind knife, the wind knife is mounted on the wind knife bracket, and the wind knife bracket is mounted on the double-roll calendering device.
[0017] The utility model provides an impregnation device for preparing thermoplastic carbon fiber prepreg. The prepreg can be preheated by an oven, so that the thermoplastic resin is transformed from a solid state to a solid non-crystalline state (called a glass state). The tension of the prepreg can be adjusted by a tension adjustment mechanism. The prepreg can be auxiliary heated by a laser heating device, so that the thermoplastic resin is transformed from a solid non-crystalline state (called a glass state) to a liquid state (fully melted). The fully melted resin can be fully pressed into the fiber by a double-roll calendering device to achieve impregnation, and finally cooled by a wind knife cooling device.
[0018] The utility model provides an impregnation device for preparing thermoplastic carbon fiber prepreg, which has the advantages of simple structure, controllable temperature, adjustable tension, fast heating and high thermal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work:
[0020] Figure 1 A schematic diagram of the structure of an impregnation device for preparing thermoplastic carbon fiber prepreg provided by the utility model;
[0021] Figure 2 It is a structural schematic diagram of a double-roll calendering device;
[0022] Figure 3 It is a structural schematic diagram of the tension adjustment mechanism;
[0023] Figure 4 This is an enlarged view of the laser heating device. DETAILED DESCRIPTION
[0024] The present invention will be further explained below in conjunction with specific implementation schemes, but the present invention is not limited thereto.
[0025] like Figures 1 to 4As shown, the utility model provides an impregnation device for preparing thermoplastic carbon fiber prepreg, comprising: an oven 1, a roller 2, a tension adjustment mechanism 3, a double-roll calendering device 4, a laser heating device 5 and a wind knife cooling device 6, wherein a feed port is arranged at the front end of the oven 1, and a discharge port is arranged at the rear end, the roller 2 is arranged at the front end of the feed port, the tension adjustment mechanism 3 is arranged in the oven 1, and is used to adjust the tension of the prepreg passing through the oven 1, the double-roll calendering device 4 is arranged at the rear end of the discharge port, and is used to calender the prepreg, the laser heating device 5 is arranged at the front end of the double-roll calendering device 4, and is used to assist in heating the prepreg entering the double-roll calendering device 4, and the wind knife cooling device 6 is arranged at the rear end of the double-roll calendering device 4, and is used to cool the prepreg output from the double-roll calendering device 4.
[0026] The impregnation equipment for preparing thermoplastic carbon fiber prepreg can preheat the prepreg through an oven to transform the thermoplastic resin from a solid state to a solid non-crystalline state (called a glass state), the tension of the prepreg can be adjusted through a tension adjustment mechanism, and auxiliary heating of the prepreg can be achieved through a laser heating device to transform the thermoplastic resin from a solid non-crystalline state (called a glass state) to a liquid state (fully melted). The fully melted resin can be fully pressed into the fiber through a double-roll calendering device to achieve impregnation, and finally cooled by a wind knife cooling device.
[0027] As an improvement of the technical solution, Figure 1 As shown, the oven 1 is a tunnel type oven, and the oven 1 comprises an oven frame 11, an oven upper cover 12 and an oven lower cover 13, wherein the oven lower cover 13 is fixed above the oven frame 11, the oven upper cover 12 is hinged above the oven lower cover 13, and an exhaust hole 121 is provided on the oven upper cover 12. Preferably, the oven has a heat insulation layer, and the temperature inside the oven is 300-320°C.
[0028] As an improvement of the technical solution, Figure 1 As shown, the roller 2 is installed at the feed port of the oven 1 through a roller bracket 21 and the height of the roller 2 is adjustable, thereby adjusting the prepreg feeding height.
[0029] As an improvement of the technical solution, Figure 3As shown, the tension adjustment mechanism 3 includes a tensioning roller 31, a tensioning roller bracket 32, a seat bearing 33 and a rotary drive device 34, wherein there are two tensioning rollers 31, and the two tensioning rollers 31 are installed in parallel and at intervals between the two tensioning roller brackets 32, wherein one tensioning roller bracket 32 is connected to one side of the oven 1 through the seat bearing 33, and the other tensioning roller bracket 32 is connected to the rotary drive device 34, and the rotary drive device 34 is fixed on the other side of the oven 1. When in use, the prepreg passes through the tension adjustment mechanism in a Z shape in the oven, and the angle of the tension roller is adjusted by the rotary drive device, thereby adjusting the tension of the prepreg.
[0030] As an improvement of the technical solution, Figure 2 As shown, the double-roll calendering device 4 includes a double-roll bracket 42, a first calendering roller 43, a second calendering roller 44 and a clamping drive device 45, wherein the first calendering roller 43 and the second calendering roller 44 are both installed on the double-roll bracket 42 and the second calendering roller 44 is located above the first calendering roller 43, and the mounting seats at both ends of the second calendering roller 44 are respectively connected to the clamping drive device 45 in a one-to-one correspondence and can be moved up and down along the double-roll bracket 42 under the drive of the clamping drive device 45 to adjust the clamping degree of the first calendering roller 43 and the second calendering roller 44, wherein the first calendering roller 43 and the second calendering roller 44 are both installed on the double-roll bracket 42 through a seat bearing 7, and the clamping drive device can be a cylinder, and a vertical guide rail is provided on the double-roll bracket, and the calendering rollers move up and down along the guide rail.
[0031] As an improvement of the technical solution, Figure 2 As shown, a servo motor 46 is installed on one side of the first calendering roller 43 and a heater 47 is installed on the other side. The servo motor is used to adjust the rotation speed of the calendering roller, and the heating temperature of the heater is 250-280°C.
[0032] As an improvement of the technical solution, Figure 2As shown, the double-roll calendering device 4 also includes a calendering frame 41, two guide rails 411 are arranged above the calendering frame 41, and the double-roll bracket 42 is slidably installed on the guide rails 411 through a slider 421. A three-phase asynchronous motor 412 is fixedly arranged on the calendering frame 41, and the three-phase asynchronous motor 412 is connected to a screw 414 through a right-angle reducer 413. A traction bracket 422 is fixedly arranged below the double-roll bracket 42, and the screw 414 is connected to the screw fixed on the traction bracket 422. The lever nut 423 is connected to drive the traction bracket 422 and the double-roller bracket 42 to move under the drive of the three-phase asynchronous motor 412. Preferably, a travel switch 424 is also fixedly installed on the traction bracket 422, which is used to be triggered when the double-roller bracket 42 moves outward to a specified position, thereby turning off the three-phase asynchronous motor 412 and stopping the double-roller bracket 42 from moving outward. By moving the double-roller bracket, it is convenient to initially pass the prepreg through the calendering roller, and then reset the double-roller bracket for calendering operation.
[0033] As an improvement of the technical solution, the laser heating device 5 is a three-degree-of-freedom position adjustable structure. The prepreg heating temperature can be adjusted by adjusting the position of the laser heating device. The position adjustment can be fed back to the controller after detecting the prepreg temperature through a temperature sensor. The controller adjusts the position of the laser heating device in real time according to the feedback. Figure 4 As shown, the laser heating device 5 includes a first linear slide 51, a rotating slide 52, a second linear slide 53 and a laser heater 54, wherein the first linear slide 51 is vertically arranged, and the first linear slide 51 and the second linear slide 53 are both provided with slide grooves and are connected through the rotating slide 52, and the laser heater 54 is arranged at one end of the second linear slide 53. Preferably, the first linear slide is fixedly connected to the double-roller bracket 42 through a connecting frame 8.
[0034] As an improvement of the technical solution, Figure 1 As shown, a discharge extension end 14 is provided at the rear end of the oven 1, and the laser heating device 5 is composed of two sets and is respectively provided above and below the discharge extension end 14, for heating the front and back sides of the prepreg, wherein the laser power is 100 watts.
[0035] As an improvement of the technical solution, Figure 1As shown, the wind knife cooling device 6 includes a wind knife bracket 61 and a wind knife 62, the wind knife 62 is installed on the wind knife bracket 61, and the wind knife bracket 61 is installed on the double-roll calendering device 4. Preferably, the wind knife bracket 61 is installed on the double-roll bracket 42 of the double-roll calendering device 4, and the wind outlet angle of the wind knife 61 is adjustable. It is further preferred that the wind knife cooling device 6 is in two sets, which can realize cooling of the front and back sides of the prepreg, cool down faster, and improve the production efficiency of the prepreg.
[0036] The specific implementation methods of the present utility model are written in a progressive manner, emphasizing the differences between the various implementation methods, and the similar parts thereof can be referenced to each other.
[0037] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.
Claims
1. An impregnation device for preparing thermoplastic carbon fiber prepreg, characterized in that: include: An oven (1), a roller (2), a tension adjustment mechanism (3), a double-roll calendering device (4), a laser heating device (5) and a wind knife cooling device (6), wherein a feed port is arranged at the front end of the oven (1), and a discharge port is arranged at the rear end, the roller (2) is arranged at the front end of the feed port, the tension adjustment mechanism (3) is arranged in the oven (1) and is used to adjust the tension of the prepreg passing through the oven (1), the double-roll calendering device (4) is arranged at the rear end of the discharge port and is used to calender the prepreg, the laser heating device (5) is arranged at the front end of the double-roll calendering device (4) and is used to assist in heating the prepreg entering the double-roll calendering device (4), and the wind knife cooling device (6) is arranged at the rear end of the double-roll calendering device (4) and is used to cool the prepreg output from the double-roll calendering device (4).
2. The impregnation device for preparing thermoplastic carbon fiber prepreg according to claim 1, characterized in that: The oven (1) is a tunnel-type oven, comprising an oven frame (11), an oven upper cover (12) and an oven lower cover (13), wherein the oven lower cover (13) is fixed above the oven frame (11), the oven upper cover (12) is hinged above the oven lower cover (13), and an exhaust hole (121) is provided on the oven upper cover (12).
3. The impregnation device for preparing thermoplastic carbon fiber prepreg according to claim 1, characterized in that: The roller (2) is installed at the feed inlet of the oven (1) via a roller support (21), and the height of the roller (2) is adjustable.
4. The impregnation device for preparing thermoplastic carbon fiber prepreg according to claim 1, characterized in that: The tension adjustment mechanism (3) comprises a tensioning roller (31), a tensioning roller bracket (32), a seat bearing (33) and a rotary drive device (34), wherein there are two tensioning rollers (31), and the two tensioning rollers (31) are installed in parallel and at intervals between two tensioning roller brackets (32), wherein one tensioning roller bracket (32) is connected to one side of the oven (1) through the seat bearing (33), and the other tensioning roller bracket (32) is connected to the rotary drive device (34), and the rotary drive device (34) is fixed to the other side of the oven (1).
5. The impregnation equipment for preparing thermoplastic carbon fiber prepreg according to claim 1, characterized in that: The double-roll calendering device (4) comprises a double-roll bracket (42), a first calendering roller (43), a second calendering roller (44) and a clamping drive device (45), wherein the first calendering roller (43) and the second calendering roller (44) are both mounted on the double-roll bracket (42) and the second calendering roller (44) is located above the first calendering roller (43), and the mounting seats at both ends of the second calendering roller (44) are respectively connected to the clamping drive device (45) in a one-to-one correspondence and can be moved up and down along the double-roll bracket (42) under the drive of the clamping drive device (45) to adjust the degree of clamping between the first calendering roller (43) and the second calendering roller (44).
6. The impregnation device for preparing thermoplastic carbon fiber prepreg according to claim 5, characterized in that: A servo motor (46) is installed on one side of the first calendering roller (43) and the second calendering roller (44), and a heater (47) is installed on the other side.
7. The impregnation device for preparing thermoplastic carbon fiber prepreg according to claim 5, characterized in that: The double-roll calendering device (4) also includes a calendering frame (41), two guide rails (411) are arranged above the calendering frame (41) at intervals, the double-roller bracket (42) is slidably mounted on the guide rails (411) via a slider (421), a three-phase asynchronous motor (412) is fixedly arranged on the calendering frame (41), the three-phase asynchronous motor (412) is connected to a lead screw (414) via a right-angle reducer (413), a traction bracket (422) is fixedly arranged below the double-roller bracket (42), the lead screw (414) is connected to a lead screw nut (423) fixed on the traction bracket (422), and is used to drive the traction bracket (422) and the double-roller bracket (42) to move under the drive of the three-phase asynchronous motor (412).
8. The impregnation equipment for preparing thermoplastic carbon fiber prepreg according to claim 1, characterized in that: The laser heating device (5) is a three-degree-of-freedom position-adjustable structure.
9. The impregnation device for preparing thermoplastic carbon fiber prepreg according to claim 8, characterized in that: A discharge extension end (14) is arranged at the rear end of the oven (1), and the laser heating device (5) comprises two sets which are arranged above and below the discharge extension end (14) respectively.
10. The impregnation equipment for preparing thermoplastic carbon fiber prepreg according to claim 1, characterized in that: The wind knife cooling device (6) comprises a wind knife support (61) and a wind knife (62), wherein the wind knife (62) is mounted on the wind knife support (61), and the wind knife support (61) is mounted on the double-roll calendering device (4).