A forming tooling, a forming method and a hat-shaped ribbed panel

Abstract

The present invention discloses a molding tool, a molding method, and a hat-shaped ribbed wall panel. The tool comprises a mold body, a soft film, a metal core mold, and a cover plate. The mold body has a flat top panel, and the top panel of the mold body is provided with a plurality of hat-shaped rib grooves parallel to each other, and each hat-shaped rib groove is connected to a retaining spring fixing clip at both ends; the metal core mold is connected to the soft film and passes through both ends of the soft film. The soft film and the metal core mold can be detachably connected to the hat-shaped rib groove, and the metal core mold and the retaining spring fixing clip are floatingly connected; the cover plate is detachably connected to the top surface of the mold body, and the cover plate covers the plurality of hat-shaped rib grooves. The present application ensures the molding quality of reinforced wall panel parts, solves the problems of difficulty in applying pressure to closed cavity parts during the molding process of hat-shaped ribbed wall panels, and difficulty in demolding after molding. The process operation is convenient and has stable production capacity. At the same time, the mold manufacturing difficulty is low, the cycle is short, the cost is low, and it is economical and practical.

Description

Technical Field

[0001] The invention relates to the technical field of composite material forming technology, and in particular to a forming tool, a forming method and a hat-shaped rib wall panel. Background Art

[0002] Carbon fiber composite molding requires a certain temperature and pressure. The ways to provide pressure include vacuum bag pressing, mold pressurization, soft mold pressurization, etc. Among them, soft mold pressurization mostly uses materials such as silicone rubber to apply pressure to the product in the closed or semi-closed cavity through the thermal expansion of the material during the heating process. The structural shape and wall thickness of the soft mold material have a great influence on the provided pressure. The soft mold is unsupported or supported by a core shaft, and the soft mold core shaft is usually fixed to the outer mold through accurate shaft positioning. The fixed soft mold pressurization form cannot achieve automatic balance of forces in all directions when the soft mold expands thermally due to the asymmetric structural shape and unequal wall thickness of the soft mold, resulting in uneven pressure of the product in the cavity and unable to guarantee the quality of the product. Summary of the Invention

[0003] The object of the present invention is to provide a forming tool, a forming method and a hat-shaped rib wall panel to solve the problem in the prior art that the pressure of the workpiece in the forming cavity is unbalanced and the quality of the workpiece cannot be guaranteed.

[0004] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0005] A molding tool comprises a mold body, a soft film, a metal core mold and a cover plate, wherein the mold body has a flat top panel, the top panel of the mold body is provided with a plurality of parallel hat-shaped rib grooves, and both ends of each hat-shaped rib groove are connected to a retaining spring fixing clip;

[0006] The metal core mold is connected to the soft film and passes through both ends of the soft film. The soft film and the metal core mold are both detachably connected to the hat-shaped rib groove. The metal core mold and the retaining clip are in floating connection.

[0007] The cover plate is detachably connected to the top surface of the mold body, and the cover plate covers the plurality of hat-shaped rib grooves.

[0008] Furthermore, each of the two ends of the hat-shaped rib groove is fixedly connected to a horizontal circlip fixing clip and a vertical circlip fixing clip, the horizontal circlip fixing clip is located in the hat-shaped rib groove, and the vertical circlip fixing clip is located outside the hat-shaped rib groove;

[0009] The metal core molds at both ends of the soft film are respectively connected to a horizontal retaining spring fixing clip and a vertical retaining spring fixing clip.

[0010] Furthermore, a horizontal circlip fixing clip and a vertical circlip fixing clip are provided at both ends of each of the hat-shaped rib grooves, the horizontal circlip fixing clip is located in the hat-shaped rib groove and is slidably connected to the hat-shaped rib groove, and the vertical circlip fixing clip is fixedly connected to the outside of the hat-shaped rib groove;

[0011] The metal core molds at both ends of the soft film are respectively connected to a horizontal retaining spring fixing clip and a vertical retaining spring fixing clip.

[0012] Furthermore, the retaining spring fixing clip is a retaining spring fixing clip with a butterfly structure.

[0013] Furthermore, the mold body also includes a side panel connected to the bottom surface of the top panel, and a plurality of universal rings are provided on the side surface.

[0014] Furthermore, the soft film is a silicone rubber soft film.

[0015] Furthermore, the cover plate is made of a carbon fiber composite plate.

[0016] A molding method of the molding tool according to any one of the above items comprises the following steps:

[0017] laying carbon fiber prepreg for forming the hat-shaped ribs in the hat-shaped rib grooves of the mold body;

[0018] A combination of a soft film and a metal core mold is placed on the carbon fiber prepreg, so that the metal core mold and the retaining clip are floatingly connected;

[0019] Laying the outer skin on the mold surface composed of the mold body and the soft film, and laying the cover plate on the outer skin;

[0020] The integral surface after laying the cover plate is heated and pressurized to solidify to form a hat-shaped rib wall panel.

[0021] Furthermore, the outer skin is in a planar or curved shape.

[0022] A hat-shaped ribbed wall panel formed according to any of the above forming methods.

[0023] According to the above technical solution, the embodiments of the present invention have at least the following effects:

[0024] 1. The molding tooling designed in this application, by designing a soft film and a metal core mold within the hat-shaped rib groove, ensures that the volume of the soft film expands due to heat during the molding of the hat-shaped rib wall panel, thereby ensuring the pressure on the hat-shaped rib. The floating connection between the metal core mold within the soft film and the retaining spring clamps at both ends ensures that the metal core mold can move effectively during the expansion of the soft film, thereby ensuring balanced pressure on the workpiece within the hat-shaped rib groove. The tooling can automatically balance the forces in all directions when the soft mold thermally expands in asymmetric or uneven wall thicknesses.

[0025] 2. The retaining spring clamps of the present application include retaining spring clamps in both horizontal and vertical directions. When forming a hat-shaped ribbed wall panel, the expansion of the soft film drives the metal core mold to produce horizontal and vertical displacements. The two spring retaining clamps can ensure the horizontal and vertical movement of the metal core mold and limit the horizontal and vertical freedom of the metal core mold, ensuring balanced pressure of the soft film on the expanded part.

[0026] 3. The present application designs a cover plate on the mold body. During the forming process of the model rib wall panel, the cover plate can press down the outer skin, ensure the overall forming effect of the outer skin and the cap-shaped rib during the forming process, and prevent the expansion of the soft membrane and the poor connection effect between the cap-shaped rib and the outer skin; the cover plate is made of 2-4mm carbon fiber composite plate, and during the forming process of the cap-shaped rib wall panel, it can ensure the fitting effect of the cover plate and the outer skin. Regardless of whether the outer skin is flat or curved, the cover plate will be deformed into the shape of the outer skin when heated during the forming process, ensuring the pressurization effect on the outer skin. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A structural schematic diagram of a hat-shaped rib wall panel in a specific embodiment of the present invention;

[0028] Figure 2 A schematic diagram of another structure of a hat-shaped rib wall panel in a specific embodiment of the present invention;

[0029] Figure 3 This is a structural diagram of a molding tool in a specific embodiment of the present invention;

[0030] Figure 4 for Figure 3 A partial enlarged view of

[0031] Figure 5 for Figure 3 Schematic diagram of the structure from different perspectives;

[0032] Figure 6 for Figure 5 A partial enlarged view of

[0033] Figure 7 Schematic diagrams of the installation of different embodiments of the retaining spring clamp.

[0034] Among them: 1. mold body; 2. soft film; 3. metal core mold; 4. retaining spring clamp; 5. screws; 6. cover plate; 7. universal lifting ring; 8. hat rib; 9. outer skin. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0036] It should be noted that, in the description of the present invention, the terms "front," "rear," "left," "right," "up," "down," "inside," and "outside" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. These are intended solely to facilitate the description of the present invention and do not require that the present invention be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. The terms "front," "rear," "left," "right," "up," and "down" used in the description of the present invention refer to directions in the accompanying drawings, and the terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0037] The purpose of the present invention is to provide a molding process for carbon fiber composite material hat-shaped rib wall panel products, to develop and manufacture tooling for qualified hat-shaped rib wall panel products that meet the requirements, and to produce hat-shaped rib wall panels that meet the requirements.

[0038] Based on the above purpose, the present application provides a molding tool, such as Figures 1 to 4 As shown, a forming tool includes a mold body 1, a soft film 2, a metal core mold 3 and a cover plate 6. The mold body 1 has a flat top panel. The top panel of the mold body 1 is provided with a plurality of hat-shaped rib grooves parallel to each other, and each hat-shaped rib groove is connected to a retaining spring fixing clip 4 at both ends; the metal core mold 3 is connected to the soft film 2 and passes through the two ends of the soft film 2. The soft film 2 and the metal core mold 3 can be detachably connected to the hat-shaped rib groove, and the metal core mold 3 and the retaining spring fixing clip 4 are floatingly connected; the cover plate 6 is detachably connected to the top surface of the mold body 1, and the cover plate 6 covers the plurality of hat-shaped rib grooves.

[0039] The forming tooling designed in this application designs a soft film and a metal core mold in the hat-shaped rib groove. When forming the hat-shaped rib wall panel, the volume of the soft film expands due to heat to ensure the pressurization effect on the hat-shaped rib; the metal core mold in the soft film and the retaining spring fixing clips at both ends are floatingly connected to ensure that the metal core mold can move effectively during the expansion of the soft film, thereby ensuring the pressure balance of the workpiece in the hat-shaped rib groove.

[0040] In some embodiments of the present application, Figure 3 As shown, the overall structure of the mold body 1 is a square frame structure, which has a top panel and a plurality of four side panels located on the bottom of the top panel. Universal lifting rings 7 are connected to the side panels on the front and rear sides to facilitate the lifting and movement of the mold body 1 as a whole, and to facilitate the delivery of the mold body into the molding equipment and removal from the molding equipment during the molding process of the model rib wall panel.

[0041] In some embodiments, the shape of the mold body 1 can be other shapes, such as a trapezoidal shape, a triangular shape, etc., as long as it has a flat top surface for forming the hat-shaped rib wall panel.

[0042] In some embodiments, the universal lifting ring 7 is a finished product of M20 specification.

[0043] In some embodiments, as Figure 4 and Figure 5 As shown, the retaining clip 4 includes a horizontal retaining clip 4 positioned at one end of the hat-shaped rib groove and a vertical retaining clip 4 positioned at the other end. The horizontal retaining clip 4 is positioned within the hat-shaped rib groove and allows the metal core mold to move horizontally. The vertical retaining clip 4 is positioned on one side of the hat-shaped rib groove, perpendicular to the length of the hat-shaped rib groove, and allows the metal core mold to move vertically.

[0044] When forming the hat-shaped rib wall panel, the expansion of the soft film will drive the metal core mold to move horizontally and vertically. The two spring fixing clamps can ensure the horizontal and vertical movement of the metal core mold and limit the horizontal and vertical freedom of the metal core mold, ensuring the balanced pressure of the soft film on the expanded part.

[0045] In some further embodiments, the retaining spring clip 4 is made of cold-bent spring steel.

[0046] In some embodiments, the cover plate 6 is placed on the top surface of the mold body 1 during use to press the outer skin 9 above the mold body 1 to maintain the combined molding effect of the outer skin 9 and the hat rib. After molding, the cover plate 6 is removed to facilitate demolding of the molded hat rib wall panel.

[0047] The cover plate 6 is made of 3mm carbon fiber laminate. This design can ensure the fit between the cover plate and the outer skin. Regardless of whether the outer skin is flat or curved, the cover plate will be deformed into the shape of the outer skin when heated during the molding process, ensuring the pressurization effect on the outer skin.

[0048] In some embodiments, the mold body 1 is made of carbon steel after welding and processing.

[0049] The soft film 2 is a silicone rubber soft film, and the silicone rubber soft mold 2 is molded by silicone casting.

[0050] The metal core mold 3 is made of 45# steel.

[0051] In some embodiments, to enable the production of cap-shaped rib panels of varying lengths using the molding tooling designed herein, the following adjustments are made to the horizontal retaining spring clips. The horizontal retaining spring clips 4 are designed to be movable within the cap-shaped rib groove and, once in place, can be locked, thereby completing the molding of the cap-shaped rib panel.

[0052] Specifically, such as Figure 7As shown, the right end of the hat-shaped rib groove is provided with a mounting slot for installing a horizontal retaining spring clamp. The depth of the slot is greater than the depth of the hat-shaped rib groove. Support plates are symmetrically fixed on the two side walls of the mounting slot. The support plates are used to support the forming plate. The horizontal retaining spring clamp is installed in the support slot. When in use, the horizontal retaining spring clamp is moved to the appropriate position and fixed with a bolt assembly. The forming plate is placed on the support plate. The top surface of the forming plate and the bottom surface of the hat-shaped rib groove are in the same horizontal plane to ensure the quality of the formed hat-shaped rib wall panel. After the forming plate is placed, the tooling is assembled. Furthermore, in order to ensure the fit between the forming plate and the hat-shaped rib groove and prevent a gap from forming between the two during forming, a pressure plate can be designed at the left end of the mounting slot. The pressure plate presses the left end of the forming plate so that the right end of the forming plate and the bottom surface of the hat-shaped rib groove are in close contact, ensuring the forming quality of the hat-shaped rib wall panel.

[0053] Based on the tooling in the above-mentioned embodiments, the present application further provides a method for forming a hat-shaped ribbed wall panel, which comprises the following steps:

[0054] Step 1: lay carbon fiber prepreg for forming hat-shaped ribs 8 in the hat-shaped rib groove of the mold body 1; the thickness of the carbon fiber prepreg is set according to needs, and its laying range should cover the side walls of the hat-shaped rib groove to ensure the connection effect with the outer skin 9 during the subsequent molding process.

[0055] Step 2: Place the assembly of the soft film 2 and the metal core mold 3 on the carbon fiber prepreg, so that the metal core mold 3 and the retaining spring clamp 4 are floatingly connected.

[0056] Step 3: Lay the outer skin 9 on the mold surface composed of the mold body 1 and the soft film 2, and lay the cover plate 6 on the outer skin 9.

[0057] Step 4: heat and pressurize the integral molded surface after laying the cover plate 6 to solidify it to form a hat-shaped rib wall panel. After the molding is completed, demould and take out the molded hat-shaped rib wall panel.

[0058] The molding method of the present application is specifically described in combination with the molding tool as follows: first, carbon fiber prepreg is laid in the hat-shaped rib groove of the mold body 1, and the bag is vacuum pre-compacted after the hat-shaped rib 8 is laid. Then, a combination of a silicone rubber soft mold 2 and a metal core mold 3 is placed in the rib groove, and the two ends of the metal core mold 3 are respectively clamped into the horizontal and vertically arranged retaining spring fixing clips 4 for fixation. The retaining spring fixing clip 4 is fixed to the mold body 1 by screws 5. The retaining spring fixing clip 4 is a butterfly-shaped structure retaining spring that can be elastically deformed and can provide a certain clamping force. The outer skin 9 is laid as a whole on the mold surface composed of the hat-shaped rib 8, the mold body 1 and the silicone rubber soft mold 2. After the outer skin 9 is laid The cover plate 6 is covered and then vacuum bagged, and then put into the tank for heating and pressurization curing according to the curing system. During the curing process, the silicone rubber soft mold 2 in the closed cavity formed by the hat-shaped rib 8 and the outer skin 9 expands rapidly due to heat, thereby exerting a certain internal tension and pressure on the product. At the same time, when the thermal expansion force of the silicone rubber soft mold 2 on the metal core mold 3 is greater than the clamping force of the retaining spring fixing clamp 4, the metal core mold 3 will move within a certain range to automatically balance the pressure in the rib groove. The floating soft mold will not be affected by the positioning limit of the metal core mold 3 and the structure and wall thickness of the silicone rubber soft mold 2, which will cause uneven pressure on the workpiece and defects, thereby producing qualified hat-shaped rib wall panel parts that meet the requirements,

[0059] The present invention also provides a hat-shaped rib wall panel such as Figure 1 and Figure 2 As shown, the hat-shaped ribbed wall panel is made by the forming tool and forming method provided by the present application. The hat-shaped ribbed wall panel made by the present application has high quality, uniform pressure and long service life.

[0060] In summary, the present application provides a molding tool, a molding method and a hat-shaped rib wall panel, which ensure the molding quality of the reinforced wall panel parts, solve the problems of difficulty in applying pressure to the closed cavity parts during the molding process of the hat-shaped rib wall panel and difficulty in demolding after molding. The process operation is convenient and has stable production capacity. At the same time, the mold manufacturing difficulty is small, the cycle is short, the cost is low, and it is economical and practical.

[0061] It is understood from common technical knowledge that the present invention may be implemented by other embodiments that do not depart from its spirit or essential features. Therefore, the embodiments disclosed above are, in all respects, merely illustrative and not exclusive. All modifications within the scope of the present invention or equivalent to the scope of the present invention are intended to be encompassed by the present invention.

Claims

1. A molding tool, characterized in that: The mold body (1) comprises a mold body (1), a soft film (2), a metal core mold (3) and a cover plate (6), wherein the mold body (1) has a flat top panel, and the top panel of the mold body (1) is provided with a plurality of hat-shaped rib grooves parallel to each other, and both ends of each hat-shaped rib groove are connected to a retaining spring fixing clip (4); The metal core mold (3) is connected inside the soft film (2) and passes through both ends of the soft film (2); the soft film (2) and the metal core mold (3) are both detachably connected inside the hat-shaped rib groove; the metal core mold (3) and the retaining spring fixing clip (4) are floatingly connected; Both ends of each of the hat-shaped rib grooves are fixedly connected to a horizontal circlip fixing clip (4) and a vertical circlip fixing clip (4), the horizontal circlip fixing clip (4) being located inside the hat-shaped rib groove, and the vertical circlip fixing clip (4) being located outside the hat-shaped rib groove; The metal core molds (3) at both ends of the soft film (2) are respectively connected to a horizontal retaining spring fixing clamp (4) and a vertical retaining spring fixing clamp (4); The cover plate (6) is detachably connected to the top surface of the mold body (1), and the cover plate (6) covers the plurality of hat-shaped rib grooves; A horizontal retaining spring fixing clip (4) and a vertical retaining spring fixing clip (4) are provided at both ends of each of the hat-shaped rib grooves, the horizontal retaining spring fixing clip (4) being located in the hat-shaped rib groove and slidably connected in the hat-shaped rib groove, and the vertical retaining spring fixing clip (4) being fixedly connected to the outside of the hat-shaped rib groove; The metal core molds (3) at both ends of the soft film (2) are respectively connected to a horizontal retaining spring fixing clamp (4) and a vertical retaining spring fixing clamp (4).

2. The molding tool according to claim 1, characterized in that: The retaining spring fixing clip (4) is a retaining spring fixing clip (4) with a butterfly structure.

3. The molding tool according to claim 1, characterized in that: The mold body (1) further comprises a side panel connected to the bottom surface of the top panel, and a plurality of universal hanging rings (7) are provided on the side surface.

4. The molding tool according to claim 1, characterized in that: The soft film (2) is a silicone rubber soft film.

5. The molding tool according to claim 1, characterized in that: The cover plate (6) is a cover plate made of a carbon fiber composite plate.

6. A molding method of the molding tool according to any one of claims 1 to 5, characterized in that: The steps include: Laying carbon fiber prepreg for forming the hat-shaped rib (8) in the hat-shaped rib groove of the mold body (1); Placing a combination of a soft film (2) and a metal core mold (3) on the carbon fiber prepreg, so that the metal core mold (3) and the retaining spring clamp (4) are floatingly connected; Laying an outer skin (9) on the mold surface composed of the mold body (1) and the soft film (2), and laying a cover plate (6) on the outer skin (9); The integral surface after the cover plate (6) is laid is heated and pressurized to be cured to form a hat-shaped rib wall panel.

7. The molding method according to claim 6, characterized in that: The outer skin (9) is in a planar or curved shape.

8. A hat-shaped rib wall panel, characterized in that: Made by the molding method according to any one of claims 6 to 7.

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