A preparation process of carbon fiber flame retardant composite board

Abstract

The present invention discloses a process for preparing a carbon fiber flame retardant composite sheet, and the present invention relates to the technical field of preparing a carbon fiber flame retardant composite sheet. The preparation of the carbon fiber flame retardant composite sheet is completed by the cooperation of a processing table, an L-shaped frame, a gradually expanding hot pressing mechanism and a trimming mechanism. The gradually expanding hot pressing mechanism includes an upper hot pressing plate, and a plurality of strip frame groups are fixedly connected to the upper part of the upper hot pressing plate at equal intervals in the circumferential direction. A pressure column fixedly connected to the upper part of a scraper through a fixed plate is used to cooperate with a lifting strip to move the edge strip auxiliary pressure plate upward and separate from the aramid honeycomb carbon fiber composite plate, and a driving unit arranged on the gradually expanding hot pressing mechanism to drive the scraper to move. After the hot pressing of the present invention is completed, the hot pressing equipment is separated from the edge of the composite plate, but the top pressure on the middle of the composite plate can still be maintained, and then the cutting and trimming after hot pressing are completed at the same position, which simplifies the production process, reduces the steps of repeated handling, reduces the risk of damage to the surface and edge of the product, and improves the appearance and quality of the product.

Description

Technical Field

[0001] The invention relates to the technical field of carbon fiber flame retardant composite plate preparation, and in particular to a carbon fiber flame retardant composite plate preparation process. Background Art

[0002] Aramid honeycomb carbon fiber composite board is made of carbon fiber reinforced fiberglass single board on both sides and aramid honeycomb core board in the middle through high temperature negative pressure bonding molding process. It is a carbon fiber flame retardant composite board with excellent performance, chemical stability, high surface finish, excellent gloss retention, stronger seismic and torsion resistance, etc. It is widely used in logistics and transportation semi-trailer carriages, which are mainly used in large van semi-trailers. At present, the preparation process of this type of carbon fiber flame retardant composite board mainly includes material preparation, multiple layered glue coating, hot pressing bonding molding and cutting and trimming processing.

[0003] Currently, hot pressing and forming and cutting and trimming are carried out separately. After hot pressing and forming, the composite board needs to be transported to the cutting and trimming area, and then the material is clamped multiple times to limit its position, which increases the risk of damage to the surface and edges of the product. In addition, the risk of damage or contamination of the composite board is easily increased during transportation, which increases the complexity of the process.

[0004] In addition, traditional hot pressing bonding molding is usually a hot pressing method in which a pressure plate is pressed against the outside of the composite board. However, this method cannot effectively squeeze out the bubbles in the cured adhesive in the interlayer, and has a general effect on spreading the cured adhesive in the interlayer, which affects the bonding strength of the composite board and the uniformity of the overall structure, and reduces the intrinsic quality of the composite board. Summary of the invention

[0005] The present invention provides a process for preparing a carbon fiber flame-retardant composite board, which solves the current problem that hot pressing bonding and cutting and trimming are carried out separately, and the composite board needs to be transported and clamped multiple times after hot pressing, which increases the risk of surface and edge damage and contamination and complicates the process. In addition, the traditional hot pressing method cannot effectively discharge bubbles in the curing glue, and the spreading effect is poor, resulting in reduced bonding strength and structural uniformity, which affects the technical problem of the intrinsic quality of the composite board.

[0006] The present invention provides a carbon fiber flame retardant composite plate preparation process, and the specific steps of the carbon fiber flame retardant composite plate preparation process are as follows:

[0007] S1. Prepare materials: prepare carbon fiber reinforced fiberglass veneer, aramid honeycomb core board and epoxy resin curing adhesive raw materials.

[0008] S2. One-time lamination and gluing: Place a carbon fiber reinforced fiberglass veneer at the bottom of the molding equipment and evenly apply epoxy resin curing glue on the surface, then place an aramid honeycomb core board on the glued carbon fiber reinforced fiberglass veneer to obtain a crude aramid honeycomb carbon fiber composite board.

[0009] S3, secondary lamination glue coating: evenly apply epoxy resin curing glue on the surface of another carbon fiber reinforced fiberglass single board and place it on top of the aramid honeycomb core board in step 2.

[0010] S4, hot pressing and bonding forming: hot pressing and bonding forming operation is started on the rough aramid honeycomb carbon fiber composite board through a gradual expansion hot pressing mechanism.

[0011] S5. Cutting and trimming processing: The finished aramid honeycomb carbon fiber composite board formed by hot pressing and bonding is pressed and limited by combining the trimming and cutting mechanism with the gradually expanding hot pressing mechanism, and then trimming and cutting operations are performed around the four sides to obtain the desired finished aramid honeycomb carbon fiber composite board.

[0012] The carbon fiber flame retardant composite board preparation process steps in the above steps S1-S5 need to be completed by the processing table, L-shaped frame, gradual expansion hot pressing mechanism and trimming mechanism.

[0013] The upper end surface of the processing table is fixedly connected to an L-shaped frame, and the processing table and the lower end surface of the transverse section of the L-shaped frame are jointly installed with a gradually expanding hot pressing mechanism for moving the rough aramid honeycomb carbon fiber composite plate from the inside to the outside while automatically increasing the pressing range so that the resin can be evenly dispersed and filled. The upper part of the processing table is provided with a trimming mechanism for cooperating with the gradually expanding hot pressing mechanism to limit the top clamp of the rough aramid honeycomb carbon fiber composite plate and trim the edge overflow glue. The gradually expanding hot pressing mechanism includes an upper hot pressing plate, and a plurality of strip frame groups are fixedly connected to the upper part of the upper hot pressing plate at equal intervals in the circumferential direction, and each of the strip frame groups is slidably connected to a strip frame group for aramid honeycomb through an L-shaped slider. An edge strip-shaped auxiliary pressure plate for hot pressing the edges of a rough carbon fiber composite board, the upper end surface of the edge strip-shaped auxiliary pressure plate is fixedly connected with a lifting strip, the lifting strip consists of a horizontal section and an inclined section fixedly connected to one end of the horizontal section, the trimming mechanism includes four slides equidistantly embedded in the upper part of the processing table in the circumferential direction, a slide frame slidably connected to the slide, a scraper fixedly connected to the slide frame on one side of the edge strip-shaped auxiliary pressure plate, a pressure column fixedly connected to the upper part of the scraper through a fixed plate for cooperating with the lifting strip to move the edge strip-shaped auxiliary pressure plate up and separate from the aramid honeycomb carbon fiber composite board, and a driving unit arranged on the gradually expanding hot pressing mechanism for driving the scraper to move.

[0014] In a possible implementation, the gradually expanding hot pressing mechanism also includes a lower hot pressing plate fixedly connected to the upper end surface of the processing table corresponding to the upper hot pressing plate, and an electric telescopic rod fixedly connected to the lower end surface of the transverse section of the L-shaped frame, the lower end of the electric telescopic rod is fixedly connected to a mounting box with a lower opening, the upper hot pressing plate is fixedly connected to the lower end surface of the mounting box, and four gradually expanding components are equidistantly arranged on the upper cavity wall of the mounting box in the circumferential direction, and the gradually expanding component includes a mounting plate fixedly connected to the upper cavity wall of the mounting box and a mounting shaft that passes through and is fixedly connected to the lower part of the mounting plate, and the outside of the mounting shaft is connected by a torsion spring The sleeve is hinged with a shaft sleeve, and the outside of the sleeve is rotatably connected to a connecting plate through a rotating column. A notch groove is opened at the lower part of the connecting plate, and a U-shaped frame is hinged in the notch groove through a rotating shaft. A telescopic frame is hinged between the two U-shaped frames, and a plurality of rolling rings are equidistantly rotatably sleeved on the outside of the telescopic frame. A tension spring is fixedly connected between the two connecting plates. The upper cavity wall of the installation box is symmetrically fixedly connected to two arc strips corresponding to the connecting plates through a fixed column, and the opposite sides of the two arc strips are respectively fixedly connected with wedge-shaped arc plates, and the upper end surface of the connecting plate is fixedly connected with a shifting column that cooperates with the wedge-shaped arc plate.

[0015] In a possible implementation, an annular groove is formed on the inner wall of the rolling ring, a T-shaped rod is symmetrically slidably connected in the annular groove, and one end of the T-shaped rod close to the center of the rolling ring is hinged to the outside of the telescopic frame.

[0016] In a possible implementation, a multi-stage spring telescopic rod is fixedly connected to the middle of the upper cavity wall of the installation box, and an elastic pressure plate is fixedly connected to the lower end of the multi-stage spring telescopic rod.

[0017] In one possible implementation, the driving unit includes a ring rail fixedly connected to the upper end surface of the mounting box by a connecting rod, two arc-shaped guide plates are rotationally symmetrically fixedly connected to the upper part of the ring rail, one of the vertical sides of the arc-shaped guide plates is in an inclined state, a driving ring is sleeved on the outside of the ring rail, two guide columns cooperating with the arc-shaped guide plates are symmetrically fixedly connected to the inner wall of the circumference of the driving ring, a vertical column is fixedly connected to the upper end surface of the slide frame, and a paddle for cooperating with the vertical column is symmetrically fixedly connected to the outside of the driving ring.

[0018] In a possible implementation, the two vertical columns corresponding to the front and back are equal in length, the two vertical columns corresponding to the left and right are equal in length, and the length of the two vertical columns opposite to each other on the left and right is longer than the length of the two vertical columns opposite to each other on the front and back.

[0019] In a possible implementation, a return spring is fixedly connected between the slide frame and the slide seat, and the four slide frames are arranged in a rotationally symmetrical shape when they are in the initial position.

[0020] In a possible implementation, the skateboard frame is symmetrically hinged with folding plates up and down, and a type pressure wheel is rotatably connected between the upper and lower opposite folding plates. The type pressure wheel consists of two symmetrically arranged cones and a column fixedly connected between the two cones. A tension spring is fixedly connected between the folding plates and the skateboard frame.

[0021] It can be seen from the above technical solutions that the present invention has the following advantages:

[0022] In the present invention, after the hot pressing is completed, the gradually expanding hot pressing mechanism is separated from the edge of the composite plate, but the top pressure on the middle of the composite plate can be maintained, and then the cutting and trimming after hot pressing are completed at the same position, thereby reducing the risk of material damage caused by multiple handling and clamping adjustment operations. By designing two different processes in sequence at the same position, continuous processing can be ensured to be carried out at the same processing position and conditions, reducing processing differences caused by position changes, and improving product consistency and quality stability.

[0023] In the present invention, by synchronously operating and combining multiple gradually expanding components in the gradually expanding hot pressing mechanism, the hot pressing is gradually moved from the middle to the edge, which can effectively spread the solidified glue in the interlayer evenly, avoiding the problem of local accumulation or insufficient glue, and can also gradually discharge the air between the materials, reduce the generation of bubbles, and improve the intrinsic quality of the composite board. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] Figure 1 This is a process diagram for preparing the carbon fiber flame retardant composite board provided by the present invention.

[0026] Figure 2 The present invention provides an overall structural diagram.

[0027] Figure 3 The present invention provides Figure 2 Schematic diagram of the enlarged structure of part A in the figure.

[0028] Figure 4 A schematic diagram of the installation structure of the gradually expanding hot pressing mechanism and the trimming mechanism provided by the present invention from a top view.

[0029] Figure 5 This is a partial structural schematic diagram of the gradual expansion hot pressing mechanism provided by the present invention.

[0030] Figure 6 The present invention provides Figure 5 Schematic diagram of the enlarged structure of part B.

[0031] Figure 7 This is a schematic cross-sectional structure diagram of the gradual expansion hot pressing mechanism provided by the present invention.

[0032] Figure 8 This is a schematic structural diagram of the first perspective of the gradually expanding component provided by the present invention.

[0033] Fig. 9 This is a schematic structural diagram of the second viewing angle of the gradually expanding component provided by the present invention.

[0034] Fig.10 The present invention provides Fig. 9 Schematic diagram of the enlarged structure of part C in the figure.

[0035] The above drawings include the following reference numerals:

[0036] 1. Processing table; 2. L-shaped frame; 3. Gradual expansion hot pressing mechanism; 31. Upper hot pressing plate; 32. Strip frame group; 33. L-shaped slider; 34. Side strip auxiliary pressing plate; 35. Lifting bar; 36. Lower hot pressing plate; 37. Electric telescopic rod; 38. Mounting box; 39. Gradual expansion assembly; 391. Mounting plate; 392. Mounting shaft; 393. Bushing; 394. Rotating column; 395. Connecting plate; 396. Notch groove; 397. U-shaped frame; 398. Telescopic frame; 399, rolling ring; 3910, tension spring; 3911, arc strip; 3912, wedge-shaped arc plate; 3913, shifting column; 4, trimming mechanism; 41, slide seat; 42, slide frame; 43, scraper; 44, pressure column; 45, driving unit; 451, ring rail; 452, arc guide plate; 453, driving ring; 454, guide column; 455, vertical column; 456, shifting plate; 5, T-bar; 6, elastic pressure plate; 7, I-type pressure wheel. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0038] See also Figure 1 , Figure 2 and Figure 4 The present invention provides a technical solution: a process for preparing a carbon fiber flame retardant composite plate. The specific steps of the process for preparing a carbon fiber flame retardant composite plate are as follows:

[0039] S1. Prepare materials: prepare carbon fiber reinforced fiberglass veneer, aramid honeycomb core board and epoxy resin curing adhesive raw materials.

[0040] S2. One-time lamination and gluing: Place a carbon fiber reinforced fiberglass veneer at the bottom of the molding equipment and evenly apply epoxy resin curing glue on the surface, then place an aramid honeycomb core board on the glued carbon fiber reinforced fiberglass veneer to obtain a crude aramid honeycomb carbon fiber composite board.

[0041] S3, secondary lamination glue coating: evenly apply epoxy resin curing glue on the surface of another carbon fiber reinforced fiberglass single board and place it on top of the aramid honeycomb core board in step 2.

[0042] S4, hot pressing and bonding forming: the hot pressing and bonding forming operation of the rough aramid honeycomb carbon fiber composite plate is started by the gradual expansion hot pressing mechanism 3.

[0043] S5, cutting and trimming processing: the cutting mechanism 4 is combined with the gradually expanding hot pressing mechanism 3 to press the hot-pressed aramid honeycomb carbon fiber composite plate product to limit the position and then perform trimming and cutting operations around it to obtain the desired aramid honeycomb carbon fiber composite plate product.

[0044] The carbon fiber flame retardant composite board preparation process steps in the above steps S1-S5 need to be completed by the processing table 1, the L-shaped frame 2, the gradually expanding hot pressing mechanism 3 and the trimming mechanism 4.

[0045] An L-shaped frame 2 is fixedly connected to the upper end surface of the processing table 1, and a gradual expansion hot pressing mechanism 3 is installed together with the lower end surface of the transverse section of the processing table 1 and the L-shaped frame 2, which is used to move the rough aramid honeycomb carbon fiber composite plate from the inside to the outside and automatically increase the pressing range so that the resin can be evenly dispersed and filled. A trimming mechanism 4 is arranged on the upper part of the processing table 1 for cooperating with the gradual expansion hot pressing mechanism 3 to limit the top clamp of the rough aramid honeycomb carbon fiber composite plate and trim the overflow glue on the edge.

[0046] See also Figure 2 and Figure 7 In this embodiment, the gradually expanding hot pressing mechanism 3 includes an electric telescopic rod 37 fixedly connected to the lower end surface of the transverse section of the L-shaped frame 2, a mounting box 38 with a lower opening fixedly connected to the lower end of the electric telescopic rod 37, an upper hot pressing plate 31 fixedly connected to the lower end surface of the mounting box 38, and a lower hot pressing plate 36 fixedly connected to the upper end surface of the processing table 1 corresponding to the upper hot pressing plate 31, four gradually expanding components 39 are equidistantly arranged on the upper cavity wall of the mounting box 38, a multi-stage spring telescopic rod is fixedly connected to the middle of the upper cavity wall of the mounting box 38, and an elastic pressure plate 6 is fixedly connected to the lower end of the multi-stage spring telescopic rod.

[0047] See also Figure 7 , Figure 8 , Fig. 9and Fig.10 The gradually expanding component 39 includes a mounting plate 391 fixedly connected to the upper cavity wall of the mounting box 38 and a mounting shaft 392 that passes through and is fixedly connected to the lower part of the mounting plate 391. The mounting shaft 392 is symmetrically hinged with a shaft sleeve 393 on the outside through a torsion spring. The shaft sleeve 393 is rotatably connected with a connecting plate 395 on the outside through a rotating column 394. A notch groove 396 is opened at the lower part of the connecting plate 395. A U-shaped frame 397 is hinged in the notch groove 396 through a rotating shaft. A telescopic frame 398 is hinged between the two U-shaped frames 397. The telescopic frame 398 is equidistantly rotatably sleeved with a plurality of rollers 39 9. A tension spring 3910 is fixedly connected between the two connecting plates 395. Two arc-shaped strips 3911 corresponding to the connecting plates 395 are symmetrically fixedly connected to the upper cavity wall of the installation box 38 through a fixed column. Wedge-shaped arc-shaped plates 3912 are fixedly connected to the opposite sides of the two arc-shaped strips 3911 respectively. A shifting column 3913 cooperating with the wedge-shaped arc-shaped plates 3912 is fixedly connected to the upper end surface of the connecting plate 395. An annular groove is provided on the inner wall of the rolling ring 399. A T-shaped rod 5 is symmetrically slidably connected in the annular groove. One end of the T-shaped rod 5 close to the center of the rolling ring 399 is hinged to the outside of the telescopic frame 398.

[0048] When the rough composite board product is hot-pressed and bonded, it is placed on the lower hot pressing plate 36, and then the electric telescopic rod 37 is controlled to extend to drive the installation box 38 to move downward. The installation box 38 then drives the elastic pressure plate 6 to contact the upper surface of the rough composite board product through the multi-stage spring telescopic rod, and the rough composite board product touches the limit. After the installation box 38 continues to move downward, it drives the rolling ring 399 to contact the upper surface of the rough composite board product. Then, as the installation box 38 moves downward, the connecting plate 395 is pressed to rotate toward the installation shaft 392. The installation shaft 392 then drives the shifting column 3913 to slide in the arc strip 3911, and the connecting plate 395 drives the rolling ring 399 to move gradually from the middle of the rough composite board product to the edge, and the shifting column 3913 is driven by the connecting plate 395. When the column 3913 slides on the arc strip 3911, it will come into contact with the inclined surface of the wedge-shaped arc plate 3912. The inclined surfaces of the two corresponding wedge-shaped arc plates 3912 squeeze the corresponding lever columns 3913 to move closer to each other. The lever columns 3913 then drive the connecting plate 395 to rotate around the rotating column 394, so that the lower ends of the connecting plates 395 move away from each other. The connecting plate 395 then drives the telescopic frame 398 to gradually extend. The telescopic frame 398 then drives the rolling rings 399 to move away from each other through the T-bar 5, so that the rolling rings 399 move away from the middle of the composite plate and away from each other at the same time, thereby automatically increasing the pressing range of the rolling rings 399.

[0049] The upper and lower parts of the composite board rough product are heated by controlling the upper hot pressing plate 31 and the lower hot pressing plate 36 to run simultaneously, and then the rolling ring 399 is moved from the middle to the edge of the upper part of the composite board rough product to evenly spread the curing glue in the composite board interlayer, thereby improving the uniformity of the hot pressing process and the curing effect of the glue. By evenly distributing pressure and heat, the situation of local pressure being too high or too low is reduced, ensuring that all parts of the material are evenly heated. Secondly, the expansion movement from the inside to the outside can also effectively discharge the air between the material interlayers, reduce the generation of bubbles, and improve the intrinsic quality of the composite board.

[0050] See also Figure 2 , Figure 4 , Figure 5 and Figure 7 In this embodiment, the gradually expanding hot pressing mechanism 3 also includes a plurality of strip frame groups 32 fixedly connected to the upper part of the upper hot pressing plate 31 at equidistant intervals in the circumferential direction, and each strip frame group 32 is slidably connected to an edge strip auxiliary pressure plate 34 for hot pressing the edge of the rough aramid honeycomb carbon fiber composite plate through an L-shaped slider 33. The upper end surface of the edge strip auxiliary pressure plate 34 is fixedly connected to a lifting bar 35, and the lifting bar 35 consists of a horizontal section and an inclined section fixedly connected to one end of the horizontal section.

[0051] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 The trimming mechanism 4 includes four slides 41 equidistantly embedded in the upper part of the processing table 1, a slide frame 42 slidably connected to the slide 41, a scraper 43 fixedly connected to the slide frame 42 on one side close to the edge strip auxiliary pressure plate 34, a pressure column 44 fixedly connected to the upper part of the scraper 43 through a fixed plate for cooperating with the lifting strip 35 to move the edge strip auxiliary pressure plate 34 upward and separate from the aramid honeycomb carbon fiber composite plate, and a driving unit 45 arranged on the gradually expanding hot pressing mechanism 3 for driving the scraper 43 to move. A return spring is fixedly connected between the slide frame 42 and the slide 41, and the four slide frames 42 are arranged in rotational symmetry when they are in the initial position.

[0052] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The driving unit 45 includes a ring rail 451 fixedly connected to the upper end surface of the installation box 38 through a connecting rod, two arc-shaped guide plates 452 are rotationally symmetrically fixedly connected to the upper part of the ring rail 451, one of the vertical sides of the arc-shaped guide plates 452 is in an inclined state, a driving ring 453 is sleeved on the outside of the ring rail 451, and two guide columns 454 cooperating with the arc-shaped guide plates 452 are symmetrically fixedly connected to the inner wall of the circumference of the driving ring 453, a vertical column 455 is fixedly connected to the upper end surface of the slide frame 42, and a dial plate 456 for cooperating with the vertical column 455 is symmetrically fixedly connected to the outside of the driving ring 453, the two vertical columns 455 corresponding to the front and back are equal in length, the two vertical columns 455 corresponding to the left and right are equal in length, and the length of the two vertical columns 455 opposite to each other on the left and right is longer than the length of the two vertical columns 455 opposite to each other on the front and back.

[0053] During the hot pressing process of the rough composite board, the side strip auxiliary pressure plate 34 is also pressed on the four sides of the edge. After the hot pressing is completed, the driving ring 453 of the self-driven power is controlled to rotate. In the initial state, the guide column 454 is located at a position that conflicts with the upper surface of the ring rail 451. The driving ring 453 rotates to drive the guide column 454 to move along the upper surface of the ring rail 451. The driving ring 453 then drives the dial plate 456 to rotate. The dial plate 456 then conflicts with the vertical column 455 located at the front and rear positions and pushes it to move. The front and rear vertical columns 455 then drive the front and rear slide frames 4 2 moves in the opposite direction, the slide frame 42 then drives the pressure column 44 to contact the inclined section of the lifting bar 35, and the inclined surfaces of the pressure column 44 and the inclined section of the lifting bar 35 squeeze each other to make the lifting bar 35 move upward, and the lifting rod then drives the edge strip-shaped auxiliary pressure plate 34 to move upward, so that the two edge strip-shaped auxiliary pressure plates 34 on the front and rear sides move upward and separate from the composite board, and then the slide frames 42 at the front and rear positions drive the scraper 43 to move along the front and rear sides of the composite board, so as to scrape and trim the overflow glue on the front and rear sides of the composite board after the hot pressing bonding is completed.

[0054] After the front and rear scrapers 43 have finished trimming the front and rear sides of the composite plate, the driving ring 453 drives the guide post 454 to move to the contact point with the inclined surface of the arc-shaped guide plate 452, and the guide post 454 gradually moves up along the inclined surface of the arc-shaped guide plate 452 and drives the driving ring 453 to move up, and the driving ring 453 then drives the paddle plate 456 to move up. Since the length of the front and rear vertical posts 455 is smaller than the length of the left and right vertical posts 455, the paddle plate 456 will separate from the front and rear vertical posts 455 after moving up and then conflict with the left and right vertical posts 455. The guide post 454 moves up along the inclined surface of the arc-shaped guide plate 452 to the arc-shaped guide plate 452. After it moves on the upper end surface of the guide plate 452, it will move on the upper end surface of the arc-shaped guide plate 452, and the paddle plate 456 then pushes the left and right vertical columns 455 to move in opposite directions, and the left and right vertical columns 455 respectively drive the pressure column 44 to move through the slide frame 42, and the left and right pressure columns 44 then cooperate with the two lifting strips 35 located on the left and right positions to drive the left and right edge strip-type auxiliary pressure plates 34 to move up and separate from the composite plate, and then the slide frame 42 synchronously drives the left and right scrapers 43 to move along the left and right sides of the composite plate, so as to scrape and trim the overflow glue on the left and right sides of the composite plate.

[0055] By sequentially controlling the separation of the edge strip auxiliary pressure plates 34 that are in contact with the upper part of the composite plate, the rolling ring 399 is always pressed against the middle of the composite plate to maintain positioning, thereby ensuring that the composite plate is stably positioned during the trimming process, reducing multiple handling and clamping operations, reducing the risk of damage to the product surface and edges, and simplifying the production process.

[0056] See also Figure 3 In this embodiment, a folding plate is symmetrically hinged on the upper and lower parts of the slide frame 42, and a type pressing wheel 7 is rotatably connected between the upper and lower opposite folding plates. The type pressing wheel 7 is composed of two symmetrically arranged cones and a column fixedly connected between the two cones. A tension spring is fixedly connected between the folding plate and the slide frame 42.

[0057] The tension spring is used to pull the profile pressing wheel 7 so that it always tightly contacts the side of the composite board as the scraper 43 moves during trimming. Then, the upper and lower sides of the edge of the composite board that it contacts are squeezed by two inclined surfaces on the upper and lower opposite sides of the profile pressing plate, thereby further ensuring that the edges of the various layers of material of the composite board can fit tightly together.

[0058] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 understood as limiting the present invention.

[0059] In addition, the terms "first", "second", "number one", "number two" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "number one", "number two" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0060] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0061] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A process for preparing a carbon fiber flame retardant composite sheet, characterized in that: The specific steps for preparing carbon fiber flame retardant composite panels are as follows: S1. Prepare materials: prepare carbon fiber reinforced fiberglass veneer, aramid honeycomb core board and epoxy resin curing glue raw materials; S2, one-time lamination and gluing: placing a carbon fiber reinforced fiberglass veneer at the bottom of the molding processing equipment and evenly applying epoxy resin curing glue on the surface, and then placing an aramid honeycomb core board on the glued carbon fiber reinforced fiberglass veneer to obtain a crude aramid honeycomb carbon fiber composite board; S3, secondary lamination glue coating: evenly apply epoxy resin curing glue on the surface of another carbon fiber reinforced fiberglass veneer and place it on top of the aramid honeycomb core board in step 2; S4, hot pressing and bonding forming: starting the hot pressing and bonding forming operation of the rough aramid honeycomb carbon fiber composite plate product by using the gradually expanding hot pressing mechanism (3); S5, cutting and trimming processing: the finished aramid honeycomb carbon fiber composite plate formed by hot pressing and bonding is pressed and limited by combining the trimming mechanism (4) with the gradually expanding hot pressing mechanism (3), and then trimming and cutting operations are performed on all sides to obtain the desired finished aramid honeycomb carbon fiber composite plate; The carbon fiber flame retardant composite board preparation process steps in the above steps S1-S5 need to be completed by the processing table (1), the L-shaped frame (2), the gradually expanding hot pressing mechanism (3) and the trimming mechanism (4); wherein: The upper end surface of the processing table (1) is fixedly connected to an L-shaped frame (2); the processing table (1) and the lower end surface of the transverse section of the L-shaped frame (2) are jointly equipped with a gradual expansion hot pressing mechanism (3) for moving the rough aramid honeycomb carbon fiber composite plate from the inside to the outside while automatically increasing the pressing range so that the resin can be evenly dispersed and filled; the upper part of the processing table (1) is provided with a trimming mechanism (4) for cooperating with the gradual expansion hot pressing mechanism (3) to limit the top clamp of the rough aramid honeycomb carbon fiber composite plate and trim the overflow glue on the edge; The gradually expanding hot pressing mechanism (3) comprises an upper hot pressing plate (31), a plurality of strip frame groups (32) are fixedly connected to the upper part of the upper hot pressing plate (31) at equal intervals in the circumferential direction, each of the strip frame groups (32) is slidably connected to an edge strip auxiliary pressing plate (34) for hot pressing the edge of the rough aramid honeycomb carbon fiber composite plate via an L-shaped slider (33), the upper end surface of the edge strip auxiliary pressing plate (34) is fixedly connected to a lifting strip (35), and the lifting strip (35) consists of a horizontal section and an inclined section fixedly connected to one end of the horizontal section; The trimming mechanism (4) comprises: Four slide seats (41) equidistantly embedded in the upper part of the processing table (1), a slide frame (42) slidably connected to the slide seat (41), a scraper (43) fixedly connected to the slide frame (42) on one side close to the edge strip auxiliary pressure plate (34), a pressure column (44) fixedly connected to the upper part of the scraper (43) through a fixed plate and used to cooperate with the lifting bar (35) to move the edge strip auxiliary pressure plate (34) upward to separate from the aramid honeycomb carbon fiber composite plate, and a driving unit (45) arranged on the gradually expanding hot pressing mechanism (3) and used to drive the scraper (43) to move; The gradually expanding hot pressing mechanism (3) further comprises a lower hot pressing plate (36) fixedly connected to the upper end surface of the processing table (1) and corresponding to the upper hot pressing plate (31), and an electric telescopic rod (37) fixedly connected to the lower end surface of the transverse section of the L-shaped frame (2); the lower end of the electric telescopic rod (37) is fixedly connected to a mounting box (38) with a lower opening; the upper hot pressing plate (31) is fixedly connected to the lower end surface of the mounting box (38); four gradually expanding components (39) are equidistantly arranged on the upper cavity wall of the mounting box (38); the gradually expanding components (39) comprise a mounting plate (391) fixedly connected to the upper cavity wall of the mounting box (38) and a mounting shaft (392) penetrating and fixedly connected to the lower part of the mounting plate (391); the mounting shaft (392) is symmetrically hinged with a shaft sleeve (393) on the outside through a torsion spring; the shaft sleeve (393) is externally hinged with a shaft sleeve (393) through a rotating column (394) is rotatably connected with a connecting plate (395), a notch groove (396) is provided at the lower part of the connecting plate (395), a U-shaped frame (397) is hinged in the notch groove (396) through a rotating shaft, a telescopic frame (398) is hinged between the two U-shaped frames (397), a plurality of rolling rings (399) are equidistantly rotatably sleeved on the outside of the telescopic frame (398), a tension spring (3910) is fixedly connected between the two connecting plates (395), two arc strips (3911) corresponding to the connecting plate (395) are symmetrically fixedly connected to the upper cavity wall of the installation box (38) through a fixing column, wedge-shaped arc plates (3912) are fixedly connected to the opposite sides of the two arc strips (3911), and a shifting column (3913) cooperating with the wedge-shaped arc plate (3912) is fixedly connected to the upper end surface of the connecting plate (395).

2. A process for preparing a carbon fiber flame retardant composite sheet according to claim 1, characterized in that: The inner wall of the rolling ring (399) is provided with an annular groove, in which a T-shaped rod (5) is symmetrically slidably connected, and one end of the T-shaped rod (5) close to the center of the rolling ring (399) is hinged to the outside of the telescopic frame (398).

3. The process for preparing a carbon fiber flame retardant composite sheet according to claim 1, characterized in that: A multi-stage spring telescopic rod is fixedly connected to the middle of the upper cavity wall of the installation box (38), and an elastic pressure plate (6) is fixedly connected to the lower end of the multi-stage spring telescopic rod.

4. The process for preparing a carbon fiber flame retardant composite sheet according to claim 2, characterized in that: The driving unit (45) comprises a ring rail (451) fixedly connected to the upper end surface of the installation box (38) through a connecting rod, two arc-shaped guide plates (452) are rotationally symmetrically fixedly connected to the upper part of the ring rail (451), one of the vertical sides of the arc-shaped guide plates (452) is in an inclined state, a driving ring (453) is sleeved on the outside of the ring rail (451), and two guide pillars (454) cooperating with the arc-shaped guide plates (452) are symmetrically fixedly connected to the inner wall of the circumference of the driving ring (453), the upper end surface of the slide frame (42) is fixedly connected to a vertical pillar (455), and a shifting plate (456) for cooperating with the vertical pillar (455) is symmetrically fixedly connected to the outside of the driving ring (453).

5. A process for preparing a carbon fiber flame retardant composite sheet according to claim 4, characterized in that: The two vertical columns (455) corresponding to the front and back are equal in length, the two vertical columns (455) corresponding to the left and right are equal in length, and the length of the two vertical columns (455) opposite to each other on the left and right is longer than the length of the two vertical columns (455) opposite to each other on the front and back.

6. The process for preparing a carbon fiber flame retardant composite sheet according to claim 1, characterized in that: A return spring is fixedly connected between the slide frame (42) and the slide seat (41), and the four slide frames (42) are arranged in a rotationally symmetrical shape when they are located at the initial position.

7. The process for preparing a carbon fiber flame retardant composite sheet according to claim 1, characterized in that: The slide frame (42) is symmetrically hinged with folding plates, and a type pressing wheel (7) is rotatably connected between the upper and lower opposite folding plates. The type pressing wheel (7) is composed of two symmetrically arranged cones and a column fixedly connected between the two cones. A tension spring is fixedly connected between the folding plates and the slide frame (42).

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