A prepreg bubble exhaust roller and its usage method

Abstract

The present invention provides a prepreg air bubble rolling press and a using method thereof, belonging to the technical field of fiber composite material forming. It solves the problem of gas wrapping that occurs during manual laying of prepregs. It includes a hand-held rod, an adjusting device and a needle roller. The adjusting device includes a hollow tube, a lead screw, a fixed pin and a movable pin. One end of the hand-held rod is provided with double ear pieces, and one end of the hollow tube is a single ear piece that cooperates with the double ear pieces. A central hole is opened at the center of the single ear piece, and a number of connecting holes are evenly distributed on the circumference of the single ear piece. The fixed pin connects the central holes of the double ear pieces and the central hole of the single ear piece, and the movable pin connects the positioning hole of the double ear pieces and one of the connecting holes of the single ear piece. By changing the connecting hole on the single ear piece connected to the movable pin, the connection angle between the hand-held rod and the adjusting device can be adjusted; a threaded hole connected to the lead screw is opened on the wall of the hollow tube, and the bracket of the needle roller extends into the hollow tube, and the needle roller is fixed to the adjusting device by tightening the bracket with the lead screw. The present invention is used for exhausting air bubbles in prepregs.

Description

Technical Field

[0001] The present invention belongs to the field of fiber composite material forming, and particularly relates to a prepreg air bubble rolling press and a using method thereof. Background Art

[0002] With the rapid development of the resin matrix composite material industry, new and efficient methods have emerged continuously. Different product structural forms and performance requirements determine the forming methods. Commonly used forming methods include winding forming, compression molding, hand lay-up, RTM, pultrusion forming, sandwich structure forming, vacuum assisted forming, etc. During the production process of fiber composite materials, due to structural and performance requirements, processes such as dry-wet combination, hybrid fiber combination, and fiber-functional material combination are often adopted. For dry or dry-wet combination forming, the quality of prepreg laying directly affects the product performance. When laying prepregs manually, problems such as gas entrapment are likely to occur. The prepreg air bubble rolling press can effectively solve the problem of air bubbles entrapped in prepregs, reduce the porosity of products, and improve product quality. Summary of the Invention

[0003] In view of this, the present invention aims to propose a prepreg air bubble rolling press to solve the problem of gas entrapment during manual laying of prepregs.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] A prepreg air bubble rolling press includes a hand-held rod, an adjusting device, and a needle roller. The adjusting device includes a hollow tube, a lead screw, a fixed pin, and a movable pin. One end of the hand-held rod is provided with double ear pieces, and one end of the hollow tube is a single ear piece that cooperates with the double ear pieces. A central hole is opened at the center of the single ear piece, and a number of connection holes are evenly distributed on the circumference of the single ear piece. A central hole is opened at the center of the double ear pieces of the hand-held rod, and a positioning hole is opened on the circumference corresponding to the connection holes of the double ear pieces and the single ear piece. The fixed pin connects the central holes of the double ear pieces and the single ear piece, and the movable pin connects the positioning hole of the double ear pieces and one of the connection holes of the single ear piece. Changing the connection hole on the single ear piece connected to the movable pin realizes the adjustment of the connection angle between the hand-held rod and the adjusting device;

[0006] A threaded hole for connecting the lead screw is opened on the pipe wall of the hollow tube. The bracket of the needle roller extends into the hollow tube, and the needle roller is fixed to the adjusting device by tightening the bracket with the lead screw.

[0007] Furthermore, when the prepreg air bubble rolling press works, it is equipped with a supporting bracket, and the needle roller is located obliquely below the rotating product.

[0008] Further, the needle roller further includes needles, a roller body, and a connecting shaft. The bracket includes a connecting rod and a frame. One end of the connecting rod extends into the hollow tube, and the other end is fixedly connected to the middle of the frame. The connecting shaft is installed on the frame, the roller body is sleeved on the connecting shaft, and a number of needles are arranged staggeredly on the outer surface of the roller body. The roller body can rotate freely around the connecting shaft to realize the rolling pressure of the needle roller on the prepreg.

[0009] Further, the needles are arranged at multiple angles circumferentially on the outer arc surface of the roller body, and the needles are arranged staggeredly along the axial direction of the roller body.

[0010] Further, the roller body is connected to the connecting shaft through bearings and retaining rings.

[0011] Further, the hand-held rod includes a hand-held push rod and a hand-held support rod. The hand-held push rod is arranged at one end of the hand-held support rod, and the other end of the hand-held support rod is a double ear piece.

[0012] Further, the hand-held rod is welded by square tubes, and the hand-held push rod and the hand-held support rod are arranged perpendicular to each other.

[0013] Further, eight connecting holes are evenly distributed on the circumference of the single ear piece.

[0014] Further, a number of threaded holes are opened on the wall of the hollow tube, and a screw rod is fitted at each threaded hole.

[0015] Another object of the present invention is to provide a method for using a prepreg air bubble rolling press, which specifically includes:

[0016] Adjust the angles of the hollow tube and the hand-held rod and the length of the needle roller in the hollow tube according to the specifications of the rotating product. After the adjustment is completed, place the hand-held rod of the rolling press horizontally on the bracket, with the needle roller located obliquely below the rotating product. Press the hand-held rod downward forcefully, and the needle roller adheres to the lower surface of the rotating product. As the rotating product rotates in a circle, it drives the needle roller to roll, piercing the prepreg that wraps the gas and discharging the gas.

[0017] Compared with the prior art, the beneficial effects of the prepreg air bubble rolling press described in the present invention are as follows:

[0018] (1) The prepreg air bubble rolling press described in the present invention has a simple structure and is easy to use, and can achieve the purpose of exhausting air, reducing the porosity of the product, and improving the product quality.

[0019] (2) For the prepreg air bubble rolling press described in the present invention, the operator keeps the hand-held rod horizontally placed on the bracket and presses the hand-held push rod downward with a small force, and the needle roller can be pressed on the surface of the product prepreg. In this state, due to the external force F applied by the person to the hand-held push rod, the support of the bracket to the hand-held rod, and the interaction between the rotating product and the needle roller, the rolling press maintains a very stable working state.

[0020] (3) For a prepreg bubble exhaust roller according to the present invention, the handheld rod and the adjusting device are designed at an angle to achieve the conversion from horizontal to inclined. When the roller works, the acupuncture roller is located on the lower oblique side of the rotating product. Compared with the direct side, the working state on the lower oblique side can apply external force to the surface of the prepreg better, improving the quality of rolling and exhausting air.

[0021] (4) For a prepreg bubble exhaust roller according to the present invention, the moving pin is inserted into a certain circumferential array hole provided on the adjusting device through the positioning hole, realizing the angle adjustment between the handheld rod and the adjusting device. Combining the elongation and shortening of the bracket, the roller can adapt to the rolling and exhausting of prepregs on products with various diameters.

[0022] (5) For a prepreg bubble exhaust roller according to the present invention, the outer arc surface of the acupuncture roller is circumferentially arranged with acupuncture needles at multiple angles, and the acupuncture needles are arranged staggeredly along the axial direction of the roller body, realizing the maximum rolling and exhausting of prepregs in the rolling area. Description of the Drawings

[0023] The drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0024] Figure 1 is a schematic structural diagram of a prepreg bubble exhaust roller according to an embodiment of the present invention;

[0025] Figure 2 is a top view of a prepreg bubble exhaust roller according to an embodiment of the present invention;

[0026] Figure 3 is a partial enlarged view of the moving pin and the fixed pin in a prepreg bubble exhaust roller according to an embodiment of the present invention;

[0027] Figure 4 is a schematic structural diagram of the adjusting device in a prepreg bubble exhaust roller according to an embodiment of the present invention;

[0028] Figure 5 is a schematic structural diagram of the acupuncture roller in a prepreg bubble exhaust roller according to an embodiment of the present invention;

[0029] Figure 6 is a cross-sectional view of the acupuncture roller in a prepreg bubble exhaust roller according to an embodiment of the present invention.

[0030] Description of the Reference Numerals:

[0031] 1. Handheld rod; 2. Adjusting device; 3. Needle roller; 4. Handheld push rod; 5. Handheld support rod; 6. Movable pin; 7. Fixed pin; 8. Hollow tube; 9. Lead screw; 10. Bracket; 11. Needling; 12. Roller body; 13. Retaining ring; 14. Bearing; 15. Connecting shaft; 16. Bracket; 17. Rotary product. Detailed implementation mode

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0035] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0036] Such as Figures 1-6As shown in the figure, a prepreg bubble exhaust roller press includes a handheld rod 1, an adjusting device 2, and a needle roller 3. The adjusting device 2 includes a hollow tube 8, a lead screw 9, a fixed pin 7, and a movable pin 6. One end of the handheld rod 1 is provided with double ear pieces, and one end of the hollow tube 8 is a single ear piece that mates with the double ear pieces. A central hole is opened at the center of the single ear piece, and several connecting holes are evenly distributed on the circumference of the single ear piece. A central hole is opened at the center of the double ear pieces of the handheld support rod 5, and a positioning hole is opened on the circumference corresponding to the connecting holes of the double ear pieces and the single ear piece. The fixed pin 7 connects the central holes of the double ear pieces and the single ear piece, and the movable pin 6 connects the positioning hole of the double ear pieces and one of the connecting holes of the single ear piece. Changing the connecting hole on the single ear piece connected to the movable pin 6 realizes the adjustment of the connection angle between the handheld rod 1 and the adjusting device 2;

[0037] A threaded hole connected to the lead screw 9 is opened on the wall of the hollow tube 8. The bracket 10 of the needle roller 3 extends into the hollow tube 8, and the needle roller 3 is fixed to the adjusting device 2 by tightening the bracket 10 with the lead screw 9.

[0038] When the prepreg bubble exhaust roller press works, it is equipped with a supporting bracket 16, and the needle roller 3 is located obliquely below the rotating product 17.

[0039] The handheld rod 1 of the roller press is horizontally placed on the bracket 16, and the handheld rod 1 is pressed downward forcefully. The needle roller 3 adheres to the lower surface of the rotating product. As the product 17 rotates in a circle, it drives the needle roller 3 to roll, piercing the prepreg wrapped with gas and discharging the gas.

[0040] The needle roller 3 further includes needles 11, a roller body 12, and a connecting shaft 15. The bracket 10 includes a connecting rod and a frame. One end of the connecting rod extends into the hollow tube 8, and the other end is fixedly connected to the middle of the frame. The connecting shaft 15 is installed on the frame, the roller body 12 is sleeved on the connecting shaft 15, and several needles 11 are arranged staggeredly on the outer surface of the roller body 12. The roller body 12 is connected to the connecting shaft 15 through a bearing 14 and a retaining ring 13; the roller body 12 can rotate freely around the connecting shaft 15 to realize the rolling pressure of the needle roller 3 on the prepreg.

[0041] The needles 11 are arranged at multiple angles circumferentially on the outer arc surface of the roller body 12, and the needles 11 are arranged staggeredly along the axial direction of the roller body 12, which can realize the maximum rolling pressure and gas exhaust of the prepreg in the rolling area.

[0042] The handheld rod 1 includes a handheld push rod 4 and a handheld support rod 5. The handheld push rod 4 is arranged at one end of the handheld support rod 5, and the other end of the handheld support rod 5 is a double ear piece. The handheld rod 1 is welded by square tubes, and the handheld push rod 4 and the handheld support rod 5 are arranged perpendicular to each other, which is easy to manually press.

[0043] In this application, the hand-held rod 1 and the adjusting device 2 are arranged at an angle. The operator keeps the hand-held rod 1 horizontally placed on the bracket 16, and the bracket 16 is located at two-thirds of the length of the hand-held support rod, that is, arranged in the direction close to the needle roller 3. At this time, the bracket 16 acts as a fulcrum. Then, the worker presses the hand-held push rod 4 downward with a small force, and the needle roller 3 can be pressed on the surface of the product prepreg. In this state, due to the external force F applied to the hand-held push rod 4, the support of the bracket 16 on the hand-held rod 1, and the interaction between the rotating product 17 and the needle roller 3, the rolling press maintains a very stable working state. As the product rotates, the prepreg is rolled and degassed, and the operation is simple and easy.

[0044] The hand-held rod 1 and the adjusting device 2 are designed at an angle to achieve the conversion of horizontal to inclined. When the rolling press works, the needle roller 3 is located on the lower oblique side of the rotating product 17. Compared with the front side or the upper oblique side, the working state on the lower oblique side can better apply an external force to the surface of the prepreg, improve the quality of rolling and degassing, and reduce the labor intensity of workers.

[0045] The length of the bracket 10 inserted into the hollow tube 8 can be adjusted according to actual needs. The operator only needs to keep the hand-held rod 1 in a horizontal state and adjust the relative position of the bracket 10 and the hollow tube 8 to achieve the rolling of the prepreg on the surface of products with different diameters.

[0046] The hand-held rod 1 and the adjusting device 2 adopt a connection method of a movable pin and a fixed pin. A central hole and eight circumferentially arrayed holes are designed on the adjusting device 2, and a central hole and a fixed pin hole are designed on the hand-held rod 1. The movable pin 6 is inserted into a corresponding circumferentially arrayed hole of the adjusting device 2 through the positioning hole to achieve the angle adjustment between the hand-held rod 1 and the adjusting device 2. Combining the elongation and shortening of the bracket 10 in the hollow tube 8, the rolling press can adapt to the rolling and bubble removal of prepregs on products with various diameters.

[0047] A number of threaded holes are provided on the pipe wall of the hollow tube 8, and a lead screw 9 is fitted at each threaded hole; multiple lead screws 9 can well position the bracket.

[0048] A method for using a prepreg degassing rolling press specifically includes:

[0049] Adjust the angles of the hollow tube 8 and the hand-held rod 1 and the length of the bracket 10 of the needle roller 3 in the hollow tube 8 according to the specifications of the rotating product. Specifically, rotate the hollow tube 8 so that a connection hole at the required angle of the single earpiece is matched with the positioning hole on the hand-held rod 1. Pass the movable pin 6 through the positioning hole and one of the connection holes on the single earpiece to adjust the angle between the hollow tube and the hand-held rod 1 at this position. First, loosen the lead screw 9 so that the bracket 10 of the needle roller 3 is not positioned with the hollow tube 8, adjust the length of the bracket 10 in the hollow tube 8 to the required length, and then rotate the lead screw 9 again to position the bracket 10 of the needle roller 3 in the hollow tube 8;

[0050] After the adjustment is completed, place the hand-held rod 1 of the rolling press horizontally on the bracket 16. The bracket 16 is located at two-thirds of the length of the hand-held support rod, that is, arranged in the direction close to the needle roller 3. At this time, the bracket 16 acts as a fulcrum. The needle roller 3 is located obliquely below the rotating product. Press down the hand-held push rod 4 of the hand-held rod 1 with force, and the needle roller 3 moves upward and adheres to the lower surface of the rotating product 17, constantly applying pressure to the surface of the product prepreg. As the rotating product 17 rotates in a circle, it drives the needle roller 3 to roll, piercing the prepreg that wraps the gas and discharging the gas.

[0051] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention.

Claims

1. A prepreg bubble exhaust roller press, characterized in that: It includes a hand-held rod (1), an adjusting device (2) and a needle roller (3). The adjusting device (2) includes a hollow tube (8), a lead screw (9), a fixed pin (7) and a movable pin (6). One end of the hand-held rod (1) is provided with double ear plates. One end of the hollow tube (8) is a single ear plate that cooperates with the double ear plates. A central hole is opened at the center of the single ear plate, and several connecting holes are evenly distributed on the circumference of the single ear plate. A central hole is opened at the center of the double ear plates of the hand-held support rod (5), and a positioning hole is opened on the circumference corresponding to the connecting holes of the double ear plates and the single ear plate. The fixed pin (7) connects the central holes of the double ear plates and the central hole of the single ear plate, and the movable pin (6) connects the positioning hole of the double ear plates and one of the connecting holes of the single ear plate. Changing the connecting hole on the single ear plate connected to the movable pin (6) realizes the adjustment of the connection angle between the hand-held rod (1) and the adjusting device (2); A threaded hole connected to the lead screw (9) is opened on the pipe wall of the hollow tube (8). The bracket (10) of the needle roller (3) extends into the hollow tube (8), and the needle roller (3) is fixed to the adjusting device (2) by tightening the bracket (10) with the lead screw (9).

2. A prepreg bubble exhaust roller press according to claim 1, characterized in that: When the prepreg bubble exhaust roller press works, it is equipped with a supporting bracket (16), and the needle roller (3) is located on the lower oblique side of the rotating product (17).

3. A prepreg bubble exhaust roller press according to claim 1, characterized in that: The needle roller (3) further includes needles (11), a roller body (12) and a connecting shaft (15). The bracket (10) includes a connecting rod and a frame. One end of the connecting rod extends into the hollow tube (8), and the other end is fixedly connected to the middle of the frame. The connecting shaft (15) is installed on the frame. The roller body (12) is sleeved on the connecting shaft (15). A number of needles (11) are arranged staggered on the outer surface of the roller body (12). The roller body (12) can rotate freely around the connecting shaft (15) to realize the rolling of the needle roller (3) on the prepreg.

4. A prepreg bubble exhaust roller press according to claim 3, characterized in that: The needles (11) are arranged at multiple angles circumferentially on the outer arc surface of the roller body (12), and the needles (11) are arranged staggered along the axial direction of the roller body (12).

5. A prepreg bubble exhaust roller press according to claim 3, characterized in that: The roller body (12) is connected to the connecting shaft (15) through a bearing (14) and a retaining ring (13).

6. A prepreg bubble exhaust roller press according to claim 1, characterized in that: The hand-held rod (1) includes a hand-held push rod (4) and a hand-held support rod (5). The hand-held push rod (4) is arranged at one end of the hand-held support rod (5), and the other end of the hand-held support rod (5) is a double ear plate.

7. A prepreg bubble exhaust roller press according to claim 6, characterized in that: The hand-held rod (1) is welded by square tubes, and the hand-held push rod (4) and the hand-held support rod (5) are arranged perpendicular to each other.

8. A prepreg bubble exhaust roller press according to claim 1, characterized in that: Eight connecting holes are evenly distributed on the circumference of the single ear piece.

9. A prepreg degassing bubble roller press according to claim 1, characterized in that: A number of threaded holes are provided on the pipe wall of the hollow pipe (8), and a lead screw (9) is fitted at each threaded hole.

10. A method for using a prepreg degassing bubble roller press according to any one of claims 1-9, characterized in that: Specifically includes: Adjust the angles of the hollow pipe (8) and the hand-held rod (1) and the length of the needle roller (3) in the hollow pipe (8) according to the specifications of the rotary product. After the adjustment is completed, place the hand-held rod (1) of the roller press horizontally on the bracket (16), and the needle roller (3) is located obliquely below the rotary product. Press the hand-held rod (1) downward forcefully, and the needle roller (3) adheres to the lower surface of the rotary product (17). As the rotary product (17) rotates in a circle, it drives the needle roller (3) to roll, puncture the prepreg wrapped with gas, and discharge the gas.

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