Self-heating composite material cavity beam structure forming mold and method

Abstract

The invention discloses a self-heating composite material cavity beam structure forming mold and method, and relates to the field of molds, the self-heating composite material cavity beam structure forming mold comprises a mold main body and a heating pipe group, the mold main body comprises a mold upper mold and a mold lower mold, a self-locking movable block is arranged between the mold upper mold and the mold lower mold, and the outer side face of the self-locking movable block is an inclined plane; extrusion self-locking is formed with the upper die of the die; the heating pipe group is arranged corresponding to the upper mold and the lower mold; the heating pipe set comprises a plurality of heating pipes transversely inserted into the mold body, and the heating pipes are connected with the temperature control electric box through connecting pipes. Uniform heating can be guaranteed, the pressure uniformity is improved on the basis that the pressure applying efficiency is improved, and the method is suitable for forming of a complex cavity beam structure.

Description

Technical Field

[0001] The present invention relates to the field of molds, and in particular to a self-heating composite material cavity beam structure molding mold and a method. Background Art

[0002] Currently, the molding process for composite cavity beam structures typically involves internal airbag inflation and external pressure and heat curing using a molding press. This process results in significant energy waste, and the production of larger components places high demands on the molding press and other equipment. Furthermore, during mold design, internal movable parts are often bolted, making demolding difficult after the product is formed.

[0003] In order to reduce the dependence of the forming mold on equipment, the prior art provides a self-heating forming mold, which includes a forming mold main body, a heating rod is arranged inside the forming mold main body, and the heating rod is arranged along the length direction of the forming mold main body; the above-mentioned forming mold is suitable for the forming of products with longer lengths, such as complex cavity-beam structures, which are prone to uneven heating. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a self-heating composite material cavity beam structure forming mold and method, which can ensure uniform heating and improve the uniformity of pressure on the basis of improving the pressure efficiency, and is suitable for the forming of complex cavity beam structures.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: In a first aspect, an embodiment of the present invention provides a self-heating composite cavity beam structure forming die, comprising: The mold body includes an upper mold and a lower mold. A self-locking movable block is provided between the upper mold and the lower mold. The outer side surface of the self-locking movable block is an inclined surface to form an extrusion self-locking with the upper mold. The heating tube group is arranged corresponding to the upper mold and the lower mold; the heating tube group includes multiple heating tubes that are horizontally inserted into the mold body, and each heating tube is connected to the temperature control electric box through a connecting tube.

[0006] As a further implementation, the heating tubes in the same heating tube group are arranged at the same or different heights.

[0007] As a further implementation, the upper mold and the lower mold are respectively provided with through holes for the heating tube to pass through.

[0008] As a further implementation, the shape of the self-locking movable block is adapted to the inner cavity of the mold body.

[0009] As a further implementation method, both ends of the self-locking movable block are provided with corners, and the outer end surfaces of the corners are inclined surfaces.

[0010] As a further implementation, air inlet holes are provided at both ends of the mold body, and joints are installed in the air inlet holes for inflating air into the mold cavity.

[0011] As a further implementation method, a mold support is provided at the bottom of the mold body, and a heat insulation board is installed on the contact surface between the mold support and the mold body.

[0012] As a further implementation method, the temperature control electric box is fixed to one side of the mold support.

[0013] In a second aspect, an embodiment of the present invention further provides a method for using a self-heating composite cavity beam structure forming mold, comprising: placing a composite cavity beam structure blank in the mold cavity; Apply pressure to close the upper and lower molds; during the locking process of the upper and lower molds, the upper mold squeezes the locking block to form a self-locking effect; Air is inflated into the cavity from both ends of the mold body and continuously heated through the heating tube group until a composite cavity-beam structure is formed.

[0014] As a further implementation, the upper mold and the lower mold are connected by bolts.

[0015] The beneficial effects of the present invention are as follows: (1) The heating tube group of the present invention includes multiple heating tubes that are inserted horizontally into the mold body. Each heating tube is connected to the temperature control electric box through a connecting tube, which can ensure the consistency of the heat provided by the heating tube and achieve uniform heating. At the same time, the molding mold is provided with a self-locking movable block to achieve self-locking between the upper mold and the lower mold. The self-locking structure combined with multiple horizontally arranged heating tubes can improve the quality and efficiency of product molding.

[0016] (2) The heating tubes in the upper mold and the lower mold of the present invention are all arranged in the horizontal direction, but the heating tubes are not all in the same horizontal plane, which can ensure uniform heating during the molding process of the complex cavity beam structure.

[0017] (3) The present invention installs joints at both ends of the mold body to achieve inflation at both ends, which is not limited by the molding machine equipment. The inflation bag pressure and self-heating are coordinated to ensure the pressure inside the cavity during product production. By applying pressure at both ends, the pressure uniformity is improved on the basis of improving the pressure application efficiency, thereby ensuring the product molding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0019] Figure 1 is a schematic diagram of the overall structure of a forming mold according to one or more embodiments of the present invention; Figure 2 is a schematic diagram of the installation of a heating tube assembly and a mold body according to one or more embodiments of the present invention; Figure 3 is a schematic diagram of the arrangement of a heating tube assembly according to one or more embodiments of the present invention; Figure 4 is a schematic diagram of the mold main body structure according to one or more embodiments of the present invention; Figure 5 1 is a schematic diagram of a lower mold structure of a mold according to one or more embodiments of the present invention; Figure 6 is a cross-sectional view of a mold body according to one or more embodiments of the present invention; Figure 7 is a schematic diagram of a self-locking movable block arrangement according to one or more embodiments of the present invention; Figure 8 is a schematic diagram of the upper mold structure of a mold according to one or more embodiments of the present invention; Figure 9 is a schematic diagram of a mold support structure according to one or more embodiments of the present invention.

[0020] Among them, 1. mold upper mold, 2. mold lower mold, 3. self-locking loose block, 4. joint, 5. heating tube, 6. temperature control electric box, 7. mold support, 8. insulation board, 9. inclined surface, 10. connecting pipe, 11. through hole. DETAILED DESCRIPTION

[0021] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those skilled in the art to which the present invention belongs.

[0022] For the convenience of description, if the words "up", "down", "left" and "right" appear in the present invention, they only indicate that they are consistent with the up, down, left and right directions of the drawings themselves, and do not limit the structure. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0023] Example 1: At present, the molding process of composite cavity beam structure products mostly involves internal air bag inflation and external use of a molding machine to provide pressure and heat curing molding, which results in dependence on equipment and high cost. Although the existing technology has some self-heating mold structures to solve the above problems, they are not suitable for complex cavity beam molding.

[0024] Based on this, this embodiment provides a self-heating composite cavity beam structure forming mold, which is suitable for complex cavity beam forming, such as Figure 1 and Figure 2 As shown, it includes a mold body, a heating tube group and a mold support 7. The heating tube group is arranged in the mold body and is heated by a temperature control electric box 6 to realize the self-heating function of the molding mold.

[0025] Specifically, such as Figure 4 and Figure 5 As shown, the mold body includes an upper mold 1 and a lower mold 2, which cooperate to form a complete cavity. The heating tube assembly of this embodiment is suitable for complex cavity beam forming, such as a cavity with a U-shaped cross-section. The left and right ends of the upper mold 1 and lower mold 2 are butted together to form the U-shaped mold body. To achieve uniform heating of the complex cavity, the upper mold 1 and lower mold 2 are each equipped with a corresponding heating tube assembly. The heating tube assembly supplies heat to the mold body in a horizontal direction, adapting to the cavity shape and enabling rapid heating.

[0026] like Figure 2 and Figure 3 As shown, the heating tube group includes multiple heating tubes 5, each heating tube 5 passes through the corresponding upper mold 1 or lower mold 2 in the horizontal direction, and multiple heating tubes 5 are spaced apart along the length direction of the mold body. The intervals between adjacent heating tubes 5 can be the same or different to adapt to cavity structures of different shapes. The spacing between adjacent heating tubes 5 is reasonably arranged through simulation analysis, so that each heating tube 5 can provide heating for a certain length section of the upper mold 1 or lower mold 2.

[0027] To ensure consistent heating, each heating tube group has one end of each heating tube 5 connected to a single connecting tube 10, which in turn connects to a single temperature-controlled electrical box 6. These two connecting tubes 10 are parallel and located outside the mold body. This allows for precise temperature control of the heating tubes 5 via the temperature-controlled electrical box 6. The connecting tubes 10 are wrapped in an insulating layer to avoid potential safety hazards caused by external piping.

[0028] The heating tubes 5 in each heating tube group are not located in the same horizontal plane to accommodate complex cavity-beam structures. For example, in a U-shaped cavity, the heating tubes 5 corresponding to the main portion of the U-shaped cavity are located in the same horizontal plane, while the heating tubes 5 near the ends of the cavity are lower than the remaining heating tubes 5.

[0029] like Figure 5 and Figure 8 As shown, through holes 11 are provided on the side walls of the upper mold 1 and the lower mold 2 to enable the installation of the heating tube 5; for the upper mold 1, each through hole 11 is located on the upper side of its internal cavity, and for the lower mold 2, each through hole 11 is located on the lower side of its internal cavity, so as to meet the self-heating requirements without affecting the molding of the composite material.

[0030] In this embodiment, an air inlet is provided at each end of the mold body, and a connector 4 is installed at the air inlet. By applying pressure at both ends, the pressure uniformity is improved while the pressure efficiency is improved.

[0031] like Figure 5-Figure 7 As shown, a self-locking block 3 is positioned between the upper mold 1 and the lower mold 2. This block 3 features an inclined surface 9. During the locking process between the upper mold 1 and the lower mold 2, the upper mold 1 presses against the inclined surface 9, causing the block 3 to move toward the product area, thereby achieving a self-locking effect. Specifically, one self-locking block 3 is positioned on each side of the cavity, extending along the length of the mold body, with its length adapted to the cavity shape.

[0032] In this embodiment, a bevel 9 is provided on the outer side surface of the self-locking block 3. According to the viewing direction, the bevel 9 is arranged to be inclined downward; at the same time, bevels 9 are also provided on both ends of the self-locking block 3 to increase the contact area with the upper mold 1 of the mold and ensure the self-locking effect.

[0033] A mold support 7 is provided at the bottom of the mold body. This support 7 comprises a support frame. In this embodiment, the support frame is welded from square tubes to prevent deformation under pressure. The stresses on the support frame are evaluated through simulated force analysis. To improve the thermal insulation between the mold body and the mold support 7, a thermal insulation board 8 is provided on top of the support frame. This ensures that the mold body and the mold support 7 remain cool during use and prevents high temperatures from affecting the temperature-controlled electrical box 6 mounted on one side of the mold support 7.

[0034] The forming mold of this embodiment has a self-heating function, and is provided with an inflation mode at both ends. The inflation bag pressure and self-heating are coordinated and controlled to form a complex cavity beam structure; the mold has a self-locking structure inside. After locking the mold, the self-locking movable block 3 is locked, and the self-locking movable block 3 is easy to come out during demolding, thereby improving the demolding efficiency.

[0035] The mold body of this embodiment is made of mold steel. The upper mold 1 and lower mold 2 are connected by bolts, achieving overall mold locking. A self-locking block 3 is installed within the mold body. As the bolts are tightened, the block 3 is locked to the desired size and position. After the mold is unlocked, the block 3 can be quickly removed, improving mold release. Furthermore, the lengthwise shape of the block 3 matches the mold cavity, providing a strong self-locking effect during the molding of complex cavity beams.

[0036] The mold body of this embodiment is heated using electric heating tubes, and the mold temperature is adjusted using a temperature control box 6, achieving temperature controllability. Air inlet holes are designed at both ends of the mold body, and connectors 4 are provided to enable air bag pressure within the cavity structure. Compared to existing technologies, this embodiment reduces dependence on equipment such as the molding press, improving molding efficiency. Furthermore, through the rational layout of the electric heating tubes, mold temperature uniformity is achieved, enhancing product quality.

[0037] Example 2: An embodiment of the present invention further provides a method for using a self-heating composite cavity beam structure forming mold, using the forming mold described in Example 1, comprising: The composite material cavity beam structure blank is placed in the mold cavity; pressure is applied to close the mold upper mold 1 and the mold lower mold 2; the mold upper mold 1 and the mold lower mold 2 are connected by bolts. During the locking process of the mold upper mold 1 and the mold lower mold 2, since the self-locking movable block 3 adopts a slope design, during the locking process of the mold upper mold 1 and the mold lower mold 2, the self-locking movable block 3 is squeezed by the mold upper mold 1 on the slope, so that the self-locking movable block 3 moves toward the product area, thereby achieving a self-locking effect.

[0038] Air is inflated into the cavity from both ends of the mold body and continuously heated by the heating tube assembly until a composite cavity-beam structure is formed. During the heating process, the heating temperature is monitored in real time by a temperature sensor, and the temperature of the heating tube 5 is controlled in real time by the temperature control box 6 to achieve uniform heating.

[0039] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A self-heating composite material cavity beam structure forming mold, characterized in that: include: The mold body includes an upper mold and a lower mold. A self-locking movable block is provided between the upper mold and the lower mold. The outer side surface of the self-locking movable block is an inclined surface to form an extrusion self-locking with the upper mold. The heating tube group is arranged corresponding to the upper mold and the lower mold; the heating tube group includes multiple heating tubes that are horizontally inserted into the mold body, and each heating tube is connected to the temperature control electric box through a connecting tube.

2. The self-heating composite cavity beam structure forming mold according to claim 1, characterized in that: The heating tubes in the same heating tube group are arranged at the same or different heights.

3. The self-heating composite cavity beam structure forming mold according to claim 2, characterized in that: The upper mold and the lower mold are respectively provided with through holes for the heating tube to pass through.

4. The self-heating composite cavity beam structure forming mold according to claim 1, characterized in that: The shape of the self-locking movable block is adapted to the inner cavity of the mold body.

5. The self-heating composite cavity beam structure forming die according to claim 4, characterized in that: Corners are provided at both ends of the self-locking movable block, and outer end surfaces of the corners are inclined surfaces.

6. The self-heating composite cavity beam structure forming mold according to claim 1, characterized in that: Air inlet holes are provided at both ends of the mold body, and joints are installed in the air inlet holes for inflating air into the mold cavity.

7. The self-heating composite cavity beam structure forming die according to claim 1, characterized in that: A mold support is provided at the bottom of the mold body, and a heat insulation board is installed on the contact surface between the mold support and the mold body.

8. The self-heating composite cavity beam structure forming die according to claim 7, characterized in that: The temperature control electric box is fixed on one side of the mold support.

9. A method for using a self-heating composite cavity beam structure forming mold according to any one of claims 1 to 8, characterized in that: include: placing a composite cavity beam structure blank in the mold cavity; Apply pressure to close the upper mold and the lower mold; During the locking process between the upper die and the lower die, the upper die squeezes the locking block to form a self-locking mechanism. Air is inflated into the cavity from both ends of the mold body and continuously heated through the heating tube group until a composite cavity-beam structure is formed.

10. The method for using the self-heating composite cavity beam structure forming mold according to claim 9, characterized in that: The upper mold and the lower mold are connected by bolts.

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