Carbon fiber composite material hot press forming device

Abstract

The utility model discloses a kind of carbon fiber composite material hot press forming devices, relate to thermoforming technical field.A kind of carbon fiber composite material hot press forming device, including base, lower mould, top plate, cylinder and upper mould, two workstation face protection components are provided on the base, workstation face protection component includes stainless steel anti-sticking board piece, protection shell and two T-shaped blocks, by the structural design of stainless steel anti-sticking board piece (heating anti-sticking board) in workstation face protection component, utilize the low surface energy characteristics of stainless steel material and possible anti-sticking treatment (such as Teflon coating), make resin overflow in hot-pressing process difficultly firmly adhere to surface, simultaneously, heating anti-sticking board can be heated by internal heating wire and softened residual resin, cooperate with the adhesion of resin greatly reduced by anti-sticking characteristics, in actual use, without scraper, sandpaper and other tools powerful cleaning, only need simple wiping or mild cleaning can remove residual.

Description

Technical Field

[0001] This utility model relates to the field of thermoforming technology, and in particular to a hot pressing device for carbon fiber composite materials. Background Technology

[0002] In the hot pressing process of carbon fiber composite materials, the worktable serves as the supporting foundation for the mold and materials, and its performance directly affects production efficiency, product quality and equipment maintenance costs. During the hot pressing process, carbon fiber prepreg or laminated materials need to be cured and molded under high temperature and high pressure. The resin components contained in the material will exhibit melting and flow characteristics when heated, and some resin that has not fully participated in the curing reaction will overflow from the edge of the mold and inevitably adhere to the worktable.

[0003] Traditional hot press molding machines typically use ordinary steel plates or cast iron for their worktables. After simple grinding, the surfaces are used directly. During long-term production, when molten resin comes into contact with the high-temperature worktable, it cools rapidly and adheres tightly to the surface, forming a hard residue layer. Because the resin has high strength and adhesion after curing, manual cleaning requires repeated scraping with tools such as scrapers and sandpaper. This not only consumes a lot of time but also easily leaves scratches, pits, and other damage on the worktable surface. These damages further exacerbate the resin residue problem in subsequent production. Thus, for hot press molding processes with high precision requirements, the flatness of the worktable directly affects the uniformity of force on the mold and the dimensional accuracy of the product. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the technical problems existing in the prior art, and to provide a hot pressing molding device for carbon fiber composite materials. This device can solve the problem that during long-term production, when molten resin comes into contact with a high-temperature work surface, it will cool rapidly and adhere tightly to the surface, forming a hard residual layer. Because the resin has high strength and adhesion after curing, manual cleaning requires repeated scraping with tools such as scrapers and sandpaper, which not only consumes a lot of time, but also easily leaves scratches, pits and other damage on the work surface. These damages will further aggravate the resin residue problem in subsequent production. Thus, for hot pressing molding processes with high precision requirements, the flatness of the work surface directly affects the uniformity of force on the mold and the dimensional accuracy of the product.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a carbon fiber composite material hot pressing molding device, comprising a base, a lower mold, a top plate, a cylinder and an upper mold, wherein two worktable protection components are provided on the base; The workbench protection assembly includes a stainless steel anti-stick plate, a protective shell, and two T-blocks. The two T-blocks are fixedly installed on the lower surface of the stainless steel anti-stick plate. Four T-block grooves are provided on the upper surface of the base. The fixing plates on both sides of the lower end of the lower mold are threaded with two fixing bolts. The protective shell is fixedly installed on the outer wall of one side of the base. Grooves are provided on the upper surfaces of both sides of the base. Among them, the outer wall of the lower end fixing block of the stainless steel anti-stick plate is slidably connected to the inner wall of the corresponding groove. The lower end inner wall of the groove is provided with a second limiting block groove. The inner wall of the second limiting block groove is slidably connected with a limiting block. The outer wall of the lower end fixing block of the stainless steel anti-stick plate near the groove is provided with a first limiting block groove. The lower surface of the protective shell is rotatably connected with a rotating threaded rod sleeve. The inner wall of the second limiting block groove is provided with an adjusting threaded rod. The lower surface of the protective shell is slidably connected with two sliding rods. The two worktable protection components are correspondingly set on both sides of the upper surface of the base and used in conjunction.

[0006] Preferably, the four T-shaped block grooves are arranged in pairs; The outer walls of the two T-blocks are slidably connected to the interior of the corresponding set of T-block grooves.

[0007] Preferably, the lower mold is installed on the upper surface of the base by four fixing bolts that fit into a groove in the upper surface of the base; The lower surface of the stainless steel anti-stick plate is attached to the upper surface of the base, and one side of the outer wall of the lower mold is attached to one side of the inner wall of the stainless steel anti-stick plate.

[0008] Preferably, the interior of the protective shell communicates with the interior of the second limiting block groove; The end of the limiting block near the first limiting block groove slides into the inside of the groove and slides in connection with the inside of the first limiting block groove.

[0009] Preferably, the end of the adjusting threaded rod near the limiting block is fixedly connected to the outer wall of the limiting block; Among them, the end of the rotating threaded rod sleeve near the limiting block rotates and extends into the interior of the second limiting block groove.

[0010] Preferably, the ends of both sliding rods near the limiting block slidably extend into the interior of the second limiting block groove and are fixedly connected to the outer wall of the limiting block; Among them, the outer wall of the end of the two adjusting threaded rods away from the limit block is connected to the internal thread of the rotating threaded rod sleeve.

[0011] Preferably, the stainless steel anti-stick plate is a heated anti-stick plate; The heating anti-stick plate has a heating wire embedded inside, and a temperature control interface is provided on the edge of the heating anti-stick plate.

[0012] Preferably, the lower surface of the top plate is fixedly connected to the end of the four support columns on the base away from the base; The cylinder is fixedly installed on the upper surface of the top plate, and the four corners of the upper mold are slidably connected to the outer walls of the four support columns on the base.

[0013] Preferably, the output end of the cylinder extends slidably to the outer wall of the top plate and is fixedly connected to the upper surface of the upper mold; Among them, the two sliding rods that are slidably connected to the upper surface of the top plate extend to the outer wall of the top plate near the upper mold and are fixedly connected to the upper surface of the upper mold. The lower mold is used in conjunction with the upper mold.

[0014] By utilizing the stainless steel anti-stick plate in the workbench protection assembly and its heating structure, the low surface energy of stainless steel and potential anti-stick treatments such as Teflon coating make it difficult for resin overflowing during hot pressing to adhere firmly to the surface. At the same time, the heating anti-stick plate can soften residual resin through internal heating wires, which, combined with the anti-stick properties, significantly reduces resin adhesion. In actual use, there is no need for strong cleaning with tools such as scrapers and sandpaper; simple wiping or light cleaning is sufficient to remove residue, avoiding the vicious cycle of "residue-scratching-damage" on the workbench and effectively improving the practicality of the equipment. Attached Figure Description

[0015] Compared with the prior art, the beneficial effects of this utility model are: 1. The carbon fiber composite material hot pressing molding device, The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the external structure of the stainless steel anti-stick plate of this utility model; Figure 3 This utility model Figure 2 A structural schematic diagram of the enlarged view at point A in the middle; Figure 4 This is a schematic diagram of the internal structure of the protective shell of this utility model; Figure 5 This is a schematic diagram of the external structure of the heating anti-stick plate of this utility model.

[0016] Reference numerals: 1. Base; 2. Fixing bolt; 3. Stainless steel anti-stick plate; 4. Lower mold; 5. T-block; 6. T-block groove; 7. Top plate; 8. Cylinder; 9. Upper mold; 10. First limit block groove; 11. Limit block; 12. Sliding rod; 13. Rotating threaded rod sleeve; 14. Adjusting threaded rod; 15. Second limit block groove; 16. Groove; 17. Protective shell; 18. Heating anti-stick plate. Detailed Implementation

[0017] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0018] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] In the description of this utility model, terms such as greater than, less than, and exceeding are understood to exclude the stated number, while terms such as above, below, and within are understood to include the stated number. The use of terms like "first" and "second" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the quantity or sequence of the indicated technical features.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] Example 1: Basic anti-stick scenario of conventional hot pressing In the conventional hot pressing production of carbon fiber composite materials in small and medium-sized factories, operators first need to clean the T-shaped block grooves 6 on the base 1 to ensure that there are no impurities. The stainless steel anti-stick plate 3 with T-shaped blocks 5 is aligned with the T-shaped block grooves 6 on both sides of the base and pushed in along the groove until it fits against the side wall of the lower mold 4. Then, the rotating threaded sleeve 13 under the protective shell 17 is rotated to drive the adjusting threaded rod 14 to push the limiting block 11 into the first limiting block groove 10 of the fixing block at the lower end of the stainless steel anti-stick plate 3 to complete the fixing. During the hot pressing process, the adhesive layer overflowing from the composite material will adhere to the surface of the stainless steel anti-stick plate. After the molding is completed, the threaded sleeve is rotated in the opposite direction to pull out the limiting block and pull the anti-stick plate out along the groove. It can be quickly cleaned by wiping with a high-temperature cloth to avoid adhesive layer residue contaminating the base.

[0022] Example 2: Replacement of non-heated anti-stick plate in low-temperature molding scenarios When producing low-temperature curing carbon fiber composite materials (curing temperature ≤120℃), the heated anti-stick plate 18 in the patent is replaced with an ordinary stainless steel anti-stick plate without heating wire. The installation process is the same as the basic scenario. Positioning is achieved by the cooperation of T-blocks and slides. Since low-temperature molding does not require additional heating, ordinary stainless steel plates can reduce energy consumption. At the same time, its surface polishing treatment can still ensure the anti-stick effect. At this time, the temperature control interface inside the protective shell does not need to be connected to the power supply. The limit block can be adjusted and fixed by the threaded rod. After use, it was found that the adhesion of the low-temperature adhesive layer on the stainless steel surface is weaker. It can be wiped clean with just a room temperature cloth. Compared with the heated anti-stick plate, the maintenance cost of the heating module is reduced.

[0023] Furthermore, when using this device, first align the two T-blocks 5 on the lower surface of the stainless steel anti-stick plate 3 with a set of T-block grooves 6 on the base 1, push the anti-stick plate along the grooves so that its lower end fixing block slides into the groove 16 of the base 1, rotate the rotating threaded rod sleeve 13 under the protective shell 17, and drive the adjusting threaded rod 14 through the threaded engagement to push the limiting block 11 to slide along the second limiting block groove 15 until one end of the limiting block 11 is inserted into the first limiting block groove 10 of the stainless steel anti-stick plate 3, thus completing the horizontal and vertical fixing of the anti-stick plate and the protection of the two worktable surfaces. The components are symmetrically installed on both sides of the upper surface of the base 1, forming a protective cover for both sides of the lower mold 4. The lower mold 4 is then placed in the groove on the upper surface of the base 1, ensuring that the outer walls of both sides of the lower mold are flush with the inner walls of the stainless steel anti-stick plates 3. Four fixing bolts 2 are threaded through the lower mold fixing plate and connected to the base, firmly locking the lower mold onto the base. Then, carbon fiber prepreg or laminated material is laid on the core surface of the lower mold 4, ensuring that the material coverage matches the cavity. Next, the cylinder 8 is activated, and the cylinder output pushes the upper mold 9 downwards along the support column of the base 1. As the lower mold 4 gradually closes, pressure is applied to the material (pressure is controlled by cylinder output). Simultaneously, the temperature control system is connected to the edge of the stainless steel anti-stick plate 3 (heated anti-stick plate 18), activating the internal heating wire to ensure that the surface temperature of the anti-stick plate is synchronized with the molding temperature of the lower mold 4 (the temperature difference is adjusted within a reasonable range by the temperature control system). This prevents premature resin curing at the material edge due to excessively low anti-stick plate temperature. During hot pressing, any resin overflowing from the material contacts the surface of the stainless steel anti-stick plate 3. Due to the stainless steel material of the anti-stick plate and any possible anti-stick treatments (such as special...), the resin adheres properly to the surface. The resin is difficult to adhere firmly (fluorine coating), and the structure of the anti-stick plate and the lower mold 4 prevents the resin from spreading to the surface of the base 1, reducing base contamination. After hot pressing and curing, the cylinder 8 drives the upper mold 9 to reset upward, detach from the lower mold 4, and take out the molded carbon fiber product. If it is necessary to clean the anti-stick plate, rotate the threaded rod sleeve 13 in the opposite direction, drive the adjusting threaded rod 14 and the limiting block 11 to retract into the second limiting block groove 15, so that the limiting block is detached from the first limiting block groove 10, and pull out the stainless steel anti-stick plate 3 along the T-shaped block slide groove 6 to clean the residual resin on the surface.

[0024] Through the structural design of the stainless steel anti-stick plate 3 (heated anti-stick plate 18) in the workbench protection assembly, the low surface energy characteristics of stainless steel and possible anti-stick treatments (such as Teflon coating) make it difficult for resin overflowing during hot pressing to adhere firmly to the surface. At the same time, the heated anti-stick plate 18 can soften the residual resin by heating it with internal heating wires. Combined with the anti-stick properties, it greatly reduces the resin adhesion. In actual use, there is no need for strong cleaning with tools such as scrapers and sandpaper. Simple wiping or light cleaning is enough to remove the residue, avoiding the vicious cycle of "residue-scratching-damage" on the workbench and effectively improving the practicality of the equipment.

[0025] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A hot pressing molding device for carbon fiber composite materials, comprising a base (1), a lower mold (4), a top plate (7), a cylinder (8), and an upper mold (9), characterized in that: Two workbench protection components are provided on the base (1); The workbench protection assembly includes a stainless steel anti-stick plate (3), a protective shell (17) and two T-blocks (5). The two T-blocks (5) are fixedly installed on the lower surface of the stainless steel anti-stick plate (3). Four T-block grooves (6) are provided on the upper surface of the base (1). The fixing plates on both sides of the lower end of the lower mold (4) are threaded with two fixing bolts (2). The protective shell (17) is fixedly installed on the outer wall of one side of the base (1). Grooves (16) are provided on both sides of the upper surface of the base (1). Among them, the outer wall of the lower end fixing block of the stainless steel anti-stick plate (3) is slidably connected to the interior of the corresponding groove (16). The lower end inner wall of the groove (16) is provided with a second limiting block groove (15). The interior of the second limiting block groove (15) is slidably connected with a limiting block (11). The outer wall of the lower end fixing block of the stainless steel anti-stick plate (3) near the groove (16) is provided with a first limiting block groove (10). The lower surface of the protective shell (17) is rotatably connected with a rotating threaded rod sleeve (13). The interior of the second limiting block groove (15) is provided with an adjusting threaded rod (14). The lower surface of the protective shell (17) is slidably connected with two sliding rods (12). The two workbench protection components are correspondingly set on both sides of the upper surface of the base (1) and used in conjunction.

2. The carbon fiber composite hot pressing molding apparatus according to claim 1, characterized in that: The four T-shaped block grooves (6) are arranged in pairs; The outer walls of the two T-blocks (5) are respectively slidably connected to the interior of the corresponding set of T-block grooves (6).

3. The carbon fiber composite hot pressing molding apparatus according to claim 1, characterized in that: The lower mold (4) is installed on the upper surface of the base (1) by four fixing bolts (2) and slots are opened in the upper surface of the base (1); Among them, the lower surface of the stainless steel anti-stick plate (3) is attached to the upper surface of the base (1), and the outer wall of one side of the lower mold (4) is attached to the inner wall of one side of the stainless steel anti-stick plate (3).

4. The carbon fiber composite hot pressing molding apparatus according to claim 1, characterized in that: The interior of the protective shell (17) is connected to the interior of the second limiting block groove (15); The limiting block (11) extends slidably into the interior of the groove (16) at one end near the first limiting block groove (10) and is slidably connected to the interior of the first limiting block groove (10).

5. The carbon fiber composite hot pressing molding apparatus according to claim 1, characterized in that: The end of the adjusting threaded rod (14) near the limiting block (11) is fixedly connected to the outer wall of the limiting block (11); Among them, the end of the rotating threaded rod sleeve (13) near the limiting block (11) rotates and extends into the interior of the second limiting block groove (15).

6. The carbon fiber composite hot pressing molding apparatus according to claim 1, characterized in that: Both sliding rods (12) extend into the interior of the second limiting block groove (15) at one end near the limiting block (11) and are fixedly connected to the outer wall of the limiting block (11); Among them, the outer wall of the end of the two adjusting threaded rods (14) away from the limit block (11) is connected to the internal thread of the rotating threaded rod sleeve (13).

7. The carbon fiber composite hot pressing molding apparatus according to claim 1, characterized in that: The stainless steel anti-stick plate (3) is a heated anti-stick plate (18); The heating anti-stick plate (18) has a heating wire embedded inside, and a temperature control interface is provided on the edge of the heating anti-stick plate (18).

8. The carbon fiber composite hot pressing molding apparatus according to claim 1, characterized in that: The lower surface of the top plate (7) is fixedly connected to one end of the four support columns on the base (1) away from the base (1); Among them, the cylinder (8) is fixedly installed on the upper surface of the top plate (7), and the four corners of the upper mold (9) are slidably connected to the outer walls of the four support columns on the base (1).

9. The carbon fiber composite material hot pressing molding apparatus according to claim 1, characterized in that: The output end of the cylinder (8) slides to the outer wall of the top plate (7) and is fixedly connected to the upper surface of the upper mold (9); Among them, the two sliding rods that are slidably connected to the upper surface of the top plate (7) extend to the outer wall of the top plate (7) near the upper mold (9) and are fixedly connected to the upper surface of the upper mold (9). The lower mold (4) is used in conjunction with the upper mold (9).

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