Carbon fiber hollow tube and production process

Abstract

The invention is applicable to the technical field of carbon fiber tube forming, and provides a carbon fiber hollow tube and a production process thereof, and the production process comprises the following steps: T1, laying a carbon fiber composite material in an outer forming mold; t2, the inner forming mold is controlled to be inflated to conduct internal pressurization on the carbon fiber composite material, the interior of the outer forming mold is heated, and the carbon fiber hollow pipe is obtained through forming; t3, the inner forming mold is subjected to pressure pumping treatment, and in the sliding process, the carbon fiber hollow pipe is adsorbed to drive the inner forming mold to complete sliding demolding; and T4, the carbon fiber hollow pipe is flattened in the sliding process of the adsorption piece, the flattened carbon fiber hollow pipe is wound through a winding piece, the inner forming mold is subjected to pressure pumping treatment through the device, so that the inflation part is separated from the carbon fiber hollow pipe, the adsorption piece is controlled to form negative pressure, and the carbon fiber hollow pipe is wound. The adsorption part adsorbs the carbon fiber hollow pipe in the sliding process and drives the carbon fiber hollow pipe to complete sliding demolding in the outer forming mold, and rapid demolding operation is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber tube molding, and more specifically, to a carbon fiber hollow tube and a production process. Background Art

[0002] Carbon fiber is an emerging material. It has become a lightweight material favored by many fields due to its performance advantages of "high tensile strength, good energy absorption and shock resistance, corrosion resistance, etc.". Carbon fiber tubes are one of the most widely used and largest number of carbon fiber-based products, and are widely used in many fields such as automobiles, sports, and sports protection.

[0003] At present, there are two main widely used carbon fiber tube forming processes. One is pultrusion, which is a method of continuously producing carbon fiber linear products under external traction, through dipping, extrusion molding, heating and curing, and fixed-length cutting. It has the advantages of stable quality and arbitrary length cutting. However, it has the disadvantages of monotonous product shape and can only produce linear profiles. Due to the single fiber direction, the lateral strength is not high, the longitudinal tensile strength is high, and it is not environmentally friendly. The other is the compression molding process, which mainly uses carbon fiber prepreg. The prepreg is cut, stacked at a certain angle, put into the mold, and heated and pressurized for curing. It has the advantages of precise and stable size, good mechanical properties, and controllable resin content.

[0004] However, most of the existing compression molding processes use a metal prefabricated mandrel as an inner mold, which cooperates with a metal outer mold to achieve molding and curing of the carbon fiber tube. After the molding and curing of the carbon fiber hollow tube is completed, due to the small molding cavity between the metal prefabricated mandrel and the metal outer mold, the carbon fiber hollow tube is inconvenient to complete the rapid demolding operation with the metal prefabricated mandrel, which affects the molding efficiency of the carbon fiber hollow tube. At the same time, the existing carbon fiber hollow tube is tubular, which is not convenient for subsequent storage and transportation. Therefore, it is very necessary to design a production process that is convenient for rapid demolding of the carbon fiber hollow tube and rapid winding of the carbon fiber hollow tube. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a carbon fiber hollow tube and a production process. After the molding and curing of the carbon fiber hollow tube, the inner molding mold is subjected to a vacuum treatment so that the inflatable part is separated from the carbon fiber hollow tube. At the same time, the adsorption part is controlled to form a negative pressure, and the adsorption part is controlled to slide between the outer molding mold and the inner molding mold. During the sliding process, the carbon fiber hollow tube is adsorbed and driven to complete sliding demolding from the outer molding mold, thereby realizing a rapid demolding operation and improving the molding efficiency of the carbon fiber tube.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A production process for a carbon fiber hollow tube comprises the following steps:

[0008] T1. Lay the carbon fiber composite material inside the outer forming mold, and fix the winding piece on the end of the outer forming mold;

[0009] T2, controlling the inflation of air into the inner molding die to pressurize the carbon fiber composite material internally, and heating the inner part of the outer molding die at the same time, so that the carbon fiber composite material is solidified, and a carbon fiber hollow tube is formed;

[0010] T3. The inner molding mold is subjected to a vacuum treatment. At the same time, the adsorption member is controlled to form a negative pressure, and the adsorption member is controlled to slide between the outer molding mold and the inner molding mold. During the sliding process, the carbon fiber hollow tube is adsorbed and driven to complete sliding demoulding from the outer molding mold;

[0011] T4. During the sliding process of the adsorption member, the two pressure rollers arranged on the winding member are driven to approach synchronously to flatten the carbon fiber hollow tube, and the adsorption member is controlled to release the negative pressure and slide to reset, and the flattened carbon fiber hollow tube is rolled up by the winding member.

[0012] The present invention is further configured as follows: the outer molding die comprises a metal outer mold cylinder with openings at both ends; fixing rings are symmetrically fixed on the circumferential side of the metal outer mold cylinder; and a T-shaped mounting plate is fixed on the circumferential side of the fixing ring.

[0013] The inner wall of the metal outer mold barrel is symmetrically provided with V-shaped grooves; the interior of the metal outer mold barrel is provided with a heating cavity; and a spiral heating wire is arranged in the heating cavity.

[0014] The present invention is further configured as follows: the inner molding mold includes an air supply pipe; a fixed plate is fixed to the end of the air supply pipe; a first connecting flange and a second connecting flange are respectively fixed to the circumferential side surface of the metal outer mold cylinder near its end; the first connecting flange is fixedly connected to the fixed plate by fastening bolts.

[0015] Heat-resistant air bags are symmetrically fixed on the side surface of the gas delivery pipe; an inflatable part is fixedly connected between the two heat-resistant air bags; and a plurality of air holes connected with the inflatable part are evenly opened on the side surface of the gas delivery pipe.

[0016] The present invention is further configured as follows: the inflation part includes a symmetrically arranged silicone connecting part; a V-shaped silicone part is symmetrically fixed between the two silicone connecting parts; the silicone connecting part and both ends of the V-shaped silicone part are connected to the air supply pipe through corresponding heat-resistant air bags.

[0017] An ear tube connected to the air pipe is fixedly passed through the side of the fixing plate; the ear tube is connected to an external air pump through a hose; a branch pipe is arranged around the side of the ear tube; the branch pipe is connected to an external air pump through a hose; and control valves are arranged on the ear tube and the branch pipe.

[0018] The present invention is further configured as follows: the adsorption part includes a connecting ring; an electric push rod is fixedly installed on the side surface of the fixed ring; the telescopic end of the electric push rod is fixedly installed on the side surface of the connecting ring; a fixing rod is symmetrically fixed on the inner wall of the connecting ring; a fixing plate is fixed between the ends of the two fixing rods; a guide seat that slides with the fixing rod is symmetrically fixed on the side surface of the metal outer membrane cylinder.

[0019] An air box is fixed on the side of the fixed plate; an extension pipe is provided on the side of the air box; the extension pipe is connected to an external vacuum pump through a hose; an exhaust pipe is symmetrically provided on the side of the air box; a V-shaped box is provided at the end of the exhaust pipe; a number of adsorption holes are evenly arranged on the side of the V-shaped box; and a V-shaped guide groove that slides with the V-shaped box is symmetrically provided on the side of the fixed plate.

[0020] The present invention is further configured as follows: an inclined guide plate is fixed to the other end of the fixing rod; a transverse guide plate is fixed to the end of the inclined guide plate; the winding member includes a side cover; and the side cover is fixedly connected to the second connecting flange by fastening bolts.

[0021] The side cover has an installation opening; a cover plate is arranged inside the installation opening; V-shaped plates are symmetrically fixed around the side of the cover plate; a discharge trough is formed between the cover plate and the two V-shaped plates and the installation opening; a screw rod is arranged on the side of the cover plate for rotation through a thread; a screw hole which is threadedly connected to the screw rod is arranged at one end of the air supply pipe.

[0022] The present invention is further configured as follows: an extension plate is symmetrically fixed to the side surface of the side cover; a vertical plate is symmetrically fixed between the two extension plates; a sliding groove is opened on the side surface of the vertical plate; and a sliding rod is fixed between the inner walls of the sliding groove.

[0023] A clamping piece is symmetrically slidably arranged between the two slide bars; the clamping piece includes a U-shaped seat; slide plates that slide with the slide groove are fixed at both ends of the U-shaped seat; a sliding hole that slides with the slide bar is opened on the surface of the slide; a reset spring is fixed between the U-shaped seat and the extension plate.

[0024] A sleeve rod is fixed between the two slide plates; a pressure roller is rotatably arranged on the outer peripheral side of the sleeve rod; an extension rod is fixed on the surface of the U-shaped seat; and a ball head is fixed on the end of the extension rod.

[0025] The present invention is further configured as follows: a discharge frame is fixed between the two extension plates; a conical feed port is connected to one end of the discharge frame; and a blower fan is provided on the oblique side surface of the conical feed port.

[0026] A baffle is fixed on the side of the discharging frame; a winding shaft is rotatably arranged through the side of the baffle; a winding motor is installed on the side of the baffle; and the output end of the winding motor is fixedly connected to one end of the winding shaft.

[0027] A controller is installed on the surface of the extension plate; the output end of the controller is electrically connected to the electric push rod, the solenoid valve, the blower fan, the winding motor, the external vacuum pump, the external air pump, the external exhaust pump and the spiral heating wire.

[0028] The present invention is further configured as follows: a limiting rail is fixed on the peripheral side of the winding shaft, and a threaded column is provided at the end thereof; and a stopper is fixed on the end of the threaded column.

[0029] An I-shaped winding roller is slidably arranged on the winding shaft; a limit groove which is slidably matched with the limit rail is opened on the inner wall of the I-shaped winding roller; a feeding groove is opened on the peripheral side of the I-shaped winding roller; and a lifting groove is opened on the top of the feeding groove.

[0030] A lifting and lowering plate is slidably arranged in the lifting groove; a threaded rod is rotatably arranged on the surface of the lifting and lowering plate; a cross groove is provided on the top of the threaded rod; a threaded hole connected to the lifting groove is provided on the peripheral side of the I-shaped winding roller; the threaded rod and the threaded hole are threadedly rotatably matched.

[0031] A carbon fiber hollow tube manufactured based on a production process of a carbon fiber hollow tube comprises carbon fiber connecting parts arranged opposite to each other; a carbon fiber V-shaped folded part is symmetrically fixedly connected between the two carbon fiber connecting parts.

[0032] The advantages of the present invention are:

[0033] 1. After the forming and curing of the carbon fiber hollow tube is completed, the inner forming mold is subjected to a vacuum treatment to separate the inflatable part from the carbon fiber hollow tube. At the same time, the adsorption part is controlled to form a negative pressure, and the adsorption part is controlled to slide between the outer forming mold and the inner forming mold. During the sliding process, the carbon fiber hollow tube is adsorbed and driven to complete sliding demolding from the outer forming mold, thereby realizing a rapid demolding operation and improving the molding efficiency of the carbon fiber tube.

[0034] 2. The lateral sides of the formed carbon fiber tube of the present invention are two symmetrical carbon fiber V-shaped folded parts, which are flattened under pressure. During the sliding process of the adsorption member, the two pressure rollers arranged on the winding member are driven to approach synchronously to flatten the carbon fiber hollow tube. The adsorption member is controlled to release the negative pressure and slide to reset. The flattened carbon fiber hollow tube is rolled up by the winding member, so that the demoulding and rolling of the carbon fiber tube are carried out simultaneously, thereby improving the production efficiency of the carbon fiber tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural schematic diagram of a carbon fiber hollow tube production device of the present invention.

[0036] Figure 2 It is a structural schematic diagram of the outer forming mold of the present invention.

[0037] Figure 3It is a structural schematic diagram of the inner molding mold of the present invention.

[0038] Figure 4 It is a structural schematic diagram of the inner molding mold of the present invention from a formal perspective.

[0039] Figure 5 It is a structural schematic diagram of the inner molding die of the present invention from another angle.

[0040] Figure 6 It is a schematic diagram of the structure of the adsorption component of the present invention.

[0041] Figure 7 It is a schematic structural diagram of the winding member of the present invention.

[0042] Figure 8 It is a structural schematic diagram of the winding member of the present invention when viewed from the left.

[0043] Fig. 9 It is a schematic structural diagram of the pressing member of the present invention.

[0044] Fig.10 It is a schematic structural diagram of the I-shaped winding roller of the present invention.

[0045] Fig.11 It is a schematic structural diagram of the lifting and lowering pressure plate of the present invention.

[0046] Fig.12 It is a schematic diagram of the state in which the carbon fiber composite material of the present invention is laid into the interior of the metal outer mold cylinder.

[0047] Fig.13 It is a schematic diagram of the inflatable part of the present invention before and after inflation.

[0048] Fig.14 It is a schematic structural diagram of the carbon fiber hollow tube of the present invention.

[0049] In the figure: 1. outer forming mold; 2. metal outer mold cylinder; 3. fixing ring; 4. T-shaped mounting plate; 5. V-shaped groove; 6. heating chamber; 7. inner forming mold; 8. air delivery pipe; 9. fixing plate; 10. first connecting flange; 11. second connecting flange; 12. heat-resistant airbag; 13. inflatable part; 14. silicone connecting part; 15. V-shaped silicone part; 16. ear tube; 17. adsorption part; 18. connecting ring; 19. electric push rod; 20. fixing rod; 21. fixing plate; 22. air box; 23. extension tube; 24. exhaust pipe; 25. V-shaped box; 26. adsorption hole; 27. V-shaped guide groove; 28. inclined guide plate; 29. ​​horizontal guide plate; 30. winding part; 31. side cover; 32. cover plate; 33. V-shaped plate; 34. discharge trough; 35. screw; 36. screw hole; 37 , extension plate; 38, vertical plate; 39, slide groove; 40, slide rod; 41, clamping member; 42, U-shaped seat; 43, slide plate; 44, slide hole; 45, return spring; 46, sleeve rod; 47, pressure roller; 48, extension rod; 49, ball head; 50, discharge frame; 51, conical feed port; 52, blower fan; 53, baffle; 54, take-up shaft; 55, take-up motor; 56, controller; 57, limit rail; 58, threaded column; 59, block; 60, I-shaped take-up roller; 61, limit groove; 62, feed groove; 63, lifting groove; 64, lifting and lowering pressure plate; 65, threaded rod; 66, cross groove; 67, threaded hole; 68, carbon fiber connection part; 69, carbon fiber V-shaped folding part; 70, carbon fiber composite material; 71, carbon fiber hollow tube; 72, guide seat. DETAILED DESCRIPTION

[0050] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0052] In the present invention, unless otherwise specified, the directions used, such as "up" and "down", usually refer to the directions shown in the drawings, or to the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0053] For example, see Figure 1-14 , the present invention provides the following technical solutions:

[0054] A production process of a carbon fiber hollow tube, specifically, comprises the following steps:

[0055] T1. Lay the carbon fiber composite material 70 inside the outer molding mold 1 , and fix the winding member 30 at the end of the outer molding mold 1 .

[0056] T2, controlling the inflation into the inner molding die 7 to pressurize the carbon fiber composite material 70, and heating the inside of the outer molding die 1 at the same time, so that the carbon fiber composite material 70 is solidified, and a carbon fiber hollow tube 71 is formed.

[0057] T3. The inner molding mold 7 is subjected to vacuum treatment. At the same time, the adsorption component 17 is controlled to form negative pressure, and the adsorption component 17 is controlled to slide between the outer molding mold 1 and the inner molding mold 7. During the sliding process, the carbon fiber hollow tube 71 is adsorbed and driven to complete sliding demolding from the outer molding mold 1.

[0058] T4. During the sliding process of the adsorption member 17, the two pressure rollers 47 arranged on the winding member 30 are driven to approach synchronously to flatten the carbon fiber hollow tube 71, and the adsorption member 17 is controlled to release the negative pressure and slide to reset, and the flattened carbon fiber hollow tube 71 is rolled up by the winding member 30.

[0059] For example 2, please refer to Figure 1-14 The second embodiment makes the following improvements on the basis of the first embodiment. Specifically, the outer molding mold 1 includes a metal outer mold cylinder 2 with openings at both ends; a fixing ring 3 is symmetrically fixed on the side surface of the metal outer mold cylinder 2; a T-shaped mounting plate 4 is fixed on the side surface of the fixing ring 3; V-shaped grooves 5 are symmetrically opened on the inner wall of the metal outer mold cylinder 2; a heating chamber 6 is opened inside the metal outer mold cylinder 2; and a spiral heating wire is arranged in the heating chamber 6.

[0060] The inner molding mold 7 includes an air pipe 8; a fixing plate 9 is fixed to the end of the air pipe 8; a first connecting flange 10 and a second connecting flange 11 are respectively fixed to the sides of the two metal outer mold cylinders near their ends; the first connecting flange 10 and the fixing plate 9 are fixedly connected by fastening bolts; heat-resistant air bags 12 are symmetrically fixed to the sides of the air pipe 8; an inflation part 13 is fixedly connected between the two heat-resistant air bags 12; a number of air holes connected to the inflation part 13 are evenly opened on the sides of the air pipe 8.

[0061] The inflatable part 13 includes a symmetrically arranged silicone connecting part 14; a V-shaped silicone part 15 is symmetrically fixed between the two silicone connecting parts 14; the silicone connecting part 14 and both ends of the V-shaped silicone part 15 are connected to the air supply pipe 8 through corresponding heat-resistant air bags 12; an ear tube 16 connected to the air supply pipe 8 is fixed through the side of the fixing plate 9; the ear tube 16 is connected to an external air pump through a hose; a branch pipe is arranged on the side around the ear tube 16; the branch pipe is connected to the external air pump through a hose; and control valves are arranged on the ear tube 16 and the branch pipe.

[0062] Working principle of the second embodiment:

[0063] The carbon fiber composite material 70 is laid inside the outer molding mold 1 (the existing compression molding process mainly uses carbon fiber prepreg, which is cut, stacked at a certain angle, and placed in a mold, and heated and pressurized to cure and mold. It has the advantages of precise and stable size, good mechanical properties, and controllable resin content), and the control valve on the branch pipe is controlled to open, and the external air pump is started to inflate the inflatable part 13, so that the silicone connecting part 14 is inflated and expanded, and the V-shaped silicone part 15 is inflated and expanded. The heat-resistant airbags 12 at both ends are expanded synchronously, and the carbon fiber composite material 70 is pressed tightly against the inner wall of the metal outer mold cylinder 2. The inflated and expanded V-shaped silicone part 15 will correspond to the carbon fiber composite material 70 The part is squeezed into the V-shaped groove 5 to form a carbon fiber V-shaped folded portion 69, and the spiral heating wire is started to heat the heating chamber 6 at the same time, so that the carbon fiber composite material 70 is cured and formed into a carbon fiber hollow tube 71, which realizes that the existing metal prefabricated core shaft is replaced by an inflation portion 13 controlled by air pressure to form the carbon fiber tube, and the molding method is changed to one-time curing molding, which is convenient for demolding of the carbon fiber hollow tube 71 after molding. It is only necessary to start an external vacuum pump to pump and pressurize the inflation portion 13 to change its internal air pressure, and the heat-resistant airbags 12 at both ends are synchronously contracted and reset, so that the inflation portion 13 is separated from the carbon fiber hollow tube 71, thereby improving the demolding efficiency of the carbon fiber hollow tube 71.

[0064] For example 3, please refer to Figure 1-14 The third embodiment makes the following improvements on the basis of the second embodiment. Specifically, the adsorption member 17 includes a connecting ring 18; an electric push rod 19 is fixedly installed on the side surface of a fixing ring 3; the telescopic end of the electric push rod 19 is fixedly installed on the side surface of the connecting ring 18; a fixing rod 20 is symmetrically fixed on the inner wall of the connecting ring 18; a fixing plate 21 is fixed between the ends of the two fixing rods 20; and a guide seat 72 that slides with the fixing rod 20 is symmetrically fixed on the side surface of the metal outer film cylinder 2.

[0065] An air box 22 is fixed to the side of the fixed plate 21; an extension pipe 23 is provided on the side of the air box 22; the extension pipe 23 is connected to an external vacuum pump through a hose; an exhaust pipe 24 is symmetrically provided on the side of the air box 22; a V-shaped box 25 is provided at the end of the exhaust pipe 24; a number of adsorption holes 26 are evenly arranged on the side of the V-shaped box 25; V-shaped guide grooves 27 that slide with the V-shaped box 25 are symmetrically provided on the side of the fixed plate 9.

[0066] Working principle of the third embodiment:

[0067] After the fixed forming of the carbon fiber hollow tube 71 is completed, it is left to stand for a period of time to wait for its temperature to drop, and a forming cavity is formed between the metal outer film tube 2 and the inflated part 13 after being inflated. When the inflated part 13 is separated from the carbon fiber hollow tube 71, the electric push rod 19 is controlled to shrink and pull the adsorption part 17 to slide toward the inside of the forming cavity until the side of the V-shaped box 25 is attached to the inner side of the carbon fiber hollow tube 71, and the external vacuum pump is started to extract the air in the air box 22 to form a negative pressure environment, thereby adsorbing the carbon fiber hollow tube 71. During the sliding process of the adsorption part 17, the carbon fiber hollow tube 71 is driven to be discharged through the discharge trough 34 to complete the demolding.

[0068] Example 4, please refer to Figure 1-14 The fourth embodiment makes the following improvements on the basis of the third embodiment. Specifically, an inclined guide plate 28 is fixed to the other end of the fixing rod 20; a transverse guide plate 29 is fixed to the end of the inclined guide plate 28; the winding member 30 includes a side cover 31; and the side cover 31 is fixedly connected to the second connecting flange 11 by fastening bolts.

[0069] A mounting opening is provided on the side of the side cover 31; a cover plate 32 is provided inside the mounting opening; V-shaped plates 33 are symmetrically fixed on the sides of the cover plate 32; a discharge chute 34 is formed between the cover plate 32 and the two V-shaped plates 33 and the mounting opening; a screw rod 35 is rotatably provided on the side of the cover plate 32; a screw hole 36 which is screwed to the screw rod 35 is provided at one end of the air delivery pipe 8.

[0070] Extension plates 37 are symmetrically fixed to the sides of the side cover 31 ; a vertical plate 38 is symmetrically fixed between the two extension plates 37 ; a sliding groove 39 is opened on the side of the vertical plate 38 ; a sliding rod 40 is fixed between the inner walls of the sliding groove 39 .

[0071] A clamping piece 41 is symmetrically slidably arranged between the two slide bars 40; the clamping piece 41 includes a U-shaped seat 42; slide plates 43 that slide with the slide groove 39 are fixed at both ends of the U-shaped seat 42; a slide hole 44 that slides with the slide bar 40 is opened on the surface of the slide plate 43; a return spring 45 is fixed between the U-shaped seat 42 and the extension plate 37.

[0072] A sleeve rod 46 is fixed between the two slide plates 43 ; a pressure roller 47 is rotatably provided on the outer peripheral side of the sleeve rod 46 ; an extension rod 48 is fixed on the surface of the U-shaped seat 42 ; and a ball head 49 is fixed at the end of the extension rod 48 .

[0073] A discharge frame 50 is fixed between the two extension plates 37 ; a conical feed port 51 is connected to one end of the discharge frame 50 ; a blower fan 52 is disposed on the oblique side of the conical feed port 51 .

[0074] A baffle 53 is fixed to the side of the discharging frame 50 ; a winding shaft 54 ​​is rotatably provided through the side of the baffle 53 ; a winding motor 55 is installed on the side of the baffle 53 ; and the output end of the winding motor 55 is fixedly connected to one end of the winding shaft 54 ​​.

[0075] A controller 56 is mounted on the surface of an extension plate 37; the output end of the controller 56 is electrically connected to the electric push rod 19, the solenoid valve, the blower fan 52, the winding motor 55, the external vacuum pump, the external air pump, the external exhaust pump and the spiral heating wire.

[0076] A limit rail 57 is fixed on the side of the winding shaft 54, and a threaded column 58 is provided at the end thereof; a stopper 59 is fixed at the end of the threaded column 58; an I-shaped winding roller 60 is slidably arranged on the winding shaft 54; a limit groove 61 is provided on the inner wall of the I-shaped winding roller 60, which slidably cooperates with the limit rail 57; a feed groove 62 is provided on the side of the I-shaped winding roller 60; and a lifting groove 63 is provided on the top of the feed groove 62.

[0077] A lifting and lowering plate 64 is slidably arranged in the lifting groove 63; a threaded rod 65 is rotatably arranged on the surface of the lifting and lowering plate 64; a cross groove 66 is provided on the top of the threaded rod 65; a threaded hole 67 connected to the lifting groove 63 is provided on the side surface of the I-shaped winding roller 60; the threaded rod 65 and the threaded hole 67 are threadedly rotatably matched.

[0078] Working principle of the fourth embodiment:

[0079] In the initial state, the ball head 49 is pressed against the bottom of the cross guide plate 29 under the elastic force of the return spring 45, and the two pressure rollers 47 move away from each other. The formed carbon fiber hollow tube 71 passes through between the two pressure rollers 47. When the inclined guide plate 28 slides and contacts the ball head 48, the ball head 48 moves together with the pressure roller 47 in the direction away from the cross guide plate 29, so that the two pressure rollers 47 move towards each other, thereby flattening the tubular carbon fiber hollow tube 71 into a flat strip, which passes through the conical feed port 51 and the discharge frame 50 in turn and enters the feed trough 62, stops the electric push rod 19, and stops the external vacuum pump at the same time. After the negative pressure environment of the air box 22 is released, the electric push rod 19 is controlled to extend and reset, and the external cross is raised. The screwdriver is inserted into the cross slot 66, and the cross screwdriver is rotated to drive the threaded rod 65 to rotate and descend along the threaded hole 67, thereby driving the lifting and lowering pressure plate 64 to slide and descend along the lifting slot 63 to press the end of the flat carbon fiber hollow tube 71, and the winding motor 55 is controlled to start and drive the winding shaft 54 ​​to rotate synchronously with the I-shaped winding roller 60 to complete the demoulding and winding of the carbon fiber hollow tube 71, thereby improving the production efficiency of the carbon fiber hollow tube 71. After the winding is completed, the stopper 59 is rotated to remove the restriction on the I-shaped winding roller 60, thereby removing the I-shaped winding roller 60 with the carbon fiber hollow tube 71 wound up, reducing the footprint of the carbon fiber hollow tube 71 and facilitating the subsequent transportation of the carbon fiber hollow tube 71.

[0080] The carbon fiber hollow tube manufactured based on a production process of a carbon fiber hollow tube includes carbon fiber connecting parts 68 arranged opposite to each other; a carbon fiber V-shaped folded part 69 is symmetrically fixedly connected between the two carbon fiber connecting parts 68 .

[0081] After being compressed, the two carbon fiber connecting parts 68 are flattened together with the two carbon fiber V-shaped folded parts 69, so that the tubular carbon fiber hollow tube 71 is flattened into a flat strip, which replaces the transmission tubular carbon fiber hollow tube 71, facilitating winding and subsequent transportation.

[0082] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0083] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0084] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0085] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0086] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A production process for a carbon fiber hollow tube, characterized in that: The following steps are involved: T1, laying the carbon fiber composite material (70) inside the outer molding die (1), and fixing the winding member (30) on the end of the outer molding die (1); T2, controlling the inflation of air into the inner molding die (7) to pressurize the carbon fiber composite material (70), and simultaneously heating the interior of the outer molding die (1) to solidify the carbon fiber composite material (70), thereby forming a carbon fiber hollow tube (71); T3, the inner molding die (7) is subjected to a vacuum treatment, and at the same time, the adsorption member (17) is controlled to form a negative pressure, and the adsorption member (17) is controlled to slide between the outer molding die (1) and the inner molding die (7), and during the sliding process, the carbon fiber hollow tube (71) is adsorbed and driven to complete sliding demoulding from the outer molding die (1); T4. During the sliding process of the adsorption member (17), the two pressure rollers (47) arranged on the winding member (30) are driven to approach synchronously, so as to flatten the carbon fiber hollow tube (71). The adsorption member (17) is controlled to release the negative pressure and slide back to its original position, and the flattened carbon fiber hollow tube (71) is rolled up by the winding member (30).

2. The production process of a carbon fiber hollow tube according to claim 1, characterized in that: The outer molding die (1) comprises a metal outer mold cylinder (2) with openings at both ends; a fixing ring (3) is symmetrically fixed to the circumferential side of the metal outer mold cylinder (2); a T-shaped mounting plate (4) is fixed to the circumferential side of the fixing ring (3); The inner wall of the metal outer mold cylinder (2) is symmetrically provided with V-shaped grooves (5); a heating cavity (6) is provided inside the metal outer mold cylinder (2); and a spiral heating wire is arranged in the heating cavity (6).

3. The production process of a carbon fiber hollow tube according to claim 2, characterized in that: The inner molding die (7) comprises an air delivery pipe (8); a fixing plate (9) is fixed to the end of the air delivery pipe (8); a first connecting flange (10) and a second connecting flange (11) are respectively fixed to the circumferential side surface of the metal outer mold cylinder (2) near the end thereof; the first connecting flange (10) and the fixing plate (9) are fixedly connected by fastening bolts; The air delivery pipe (8) is symmetrically fixed with heat-resistant air bags (12); an inflation portion (13) is fixedly connected between the two heat-resistant air bags (12); and a plurality of air holes in communication with the inflation portion (13) are evenly opened on the side surface of the air delivery pipe (8).

4. The production process of a carbon fiber hollow tube according to claim 3, characterized in that: The inflatable part (13) comprises symmetrically arranged silicone connecting parts (14); a V-shaped silicone part (15) is symmetrically fixed between the two silicone connecting parts (14); both ends of the silicone connecting part (14) and the V-shaped silicone part (15) are connected to the air delivery pipe (8) through corresponding heat-resistant air bags (12); An ear tube (16) connected to the air supply pipe (8) is fixedly passed through the side of the fixing plate (9); the ear tube (16) is connected to an external air pump via a hose; a branch pipe is arranged around the side of the ear tube (16); the branch pipe is connected to the external air pump via a hose; and control valves are arranged on the ear tube (16) and the branch pipe.

5. The production process of a carbon fiber hollow tube according to claim 4, characterized in that: The adsorption member (17) comprises a connecting ring (18); an electric push rod (19) is fixedly mounted on the peripheral side surface of the fixing ring (3); the telescopic end of the electric push rod (19) is fixedly mounted on the side surface of the connecting ring (18); a fixing rod (20) is symmetrically fixed on the inner wall of the connecting ring (18); a fixing plate (21) is fixed between the ends of the two fixing rods (20); a guide seat (72) which is slidably matched with the fixing rod (20) is symmetrically fixed on the peripheral side surface of the metal outer film cylinder (2); An air box (22) is fixed on the side of the fixing plate (21); an extension pipe (23) is arranged on the side of the air box (22); the extension pipe (23) is connected to an external vacuum pump through a hose; an exhaust pipe (24) is symmetrically arranged on the side of the air box (22); a V-shaped box (25) is arranged at the end of the exhaust pipe (24); a plurality of adsorption holes (26) are evenly arranged on the side of the V-shaped box (25); and a V-shaped guide groove (27) slidably matched with the V-shaped box (25) is symmetrically arranged on the side of the fixing plate (9).

6. The production process of a carbon fiber hollow tube according to claim 5, characterized in that: The other end of the fixing rod (20) is fixed with an inclined guide plate (28); the end of the inclined guide plate (28) is fixed with a transverse guide plate (29); the winding member (30) comprises a side cover (31); the side cover (31) is fixedly connected to the second connecting flange (11) by fastening bolts; The side cover (31) is provided with a mounting opening on its side; a cover plate (32) is arranged inside the mounting opening; V-shaped plates (33) are symmetrically fixed to the side surfaces of the cover plate (32); a discharge trough (34) is formed between the cover plate (32) and the two V-shaped plates (33) and the mounting opening; a screw rod (35) is rotatably arranged through the side surface of the cover plate (32); and a screw hole (36) is provided at one end of the air delivery pipe (8) and is screwed to the screw rod (35).

7. The production process of a carbon fiber hollow tube according to claim 6, characterized in that: The side cover (31) is symmetrically fixed with an extension plate (37); a vertical plate (38) is symmetrically fixed between the two extension plates (37); a sliding groove (39) is opened on the side of the vertical plate (38); a sliding rod (40) is fixed between the inner walls of the sliding groove (39); A pressing member (41) is symmetrically slidably arranged between the two slide bars (40); the pressing member (41) includes a U-shaped seat (42); a slide plate (43) that is slidably matched with the slide groove (39) is fixed at both ends of the U-shaped seat (42); a slide hole (44) that is slidably matched with the slide bar (40) is opened on the surface of the slide plate (43); a return spring (45) is fixed between the U-shaped seat (42) and the extension plate (37); A sleeve rod (46) is fixed between the two slide plates (43); a pressure roller (47) is rotatably arranged on the outer peripheral side of the sleeve rod (46); an extension rod (48) is fixed on the surface of the U-shaped seat (42); and a ball head (49) is fixed at the end of the extension rod (48).

8. The production process of a carbon fiber hollow tube according to claim 7, characterized in that: A discharge frame (50) is fixed between the two extension plates (37); one end of the discharge frame (50) is connected to a conical feed port (51); a blower fan (52) is provided on the oblique side surface of the conical feed port (51); A baffle (53) is fixed on the side of the material discharging frame (50); a winding shaft (54) is rotatably provided through the side of the baffle (53); a winding motor (55) is installed on the side of the baffle (53); the output end of the winding motor (55) is fixedly connected to one end of the winding shaft (54); A controller (56) is mounted on the surface of the extension plate (37); the output end of the controller (56) is electrically connected to the electric push rod (19), the solenoid valve, the blower fan (52), the winding motor (55), the external vacuum pump, the external air pump, the external exhaust pump and the spiral heating wire.

9. The production process of a carbon fiber hollow tube according to claim 8, characterized in that: A limiting rail (57) is fixed on the side surface of the winding shaft (54), and a threaded column (58) is provided at the end thereof; a stopper (59) is fixed at the end of the threaded column (58); An I-shaped winding roller (60) is slidably arranged on the winding shaft (54); a limiting groove (61) is provided on the inner wall of the I-shaped winding roller (60) and is slidably matched with the limiting rail (57); a feeding groove (62) is provided on the peripheral side of the I-shaped winding roller (60); a lifting groove (63) is provided on the top of the feeding groove (62); A lifting and lowering plate (64) is slidably arranged in the lifting groove (63); a threaded rod (65) is rotatably arranged on the surface of the lifting and lowering plate (64); a cross groove (66) is provided on the top of the threaded rod (65); a threaded hole (67) connected to the lifting groove (63) is provided on the peripheral side of the I-shaped winding roller (60); the threaded rod (65) and the threaded hole (67) are threadedly rotatably matched.

10. A carbon fiber hollow tube produced by the production process of a carbon fiber hollow tube according to any one of claims 1 to 9, characterized in that: It comprises carbon fiber connecting parts (68) arranged opposite to each other; a carbon fiber V-shaped folding part (69) is symmetrically fixedly connected between the two carbon fiber connecting parts (68).

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