Separated mold suitable for forming complex reinforced housing made of composite material

Abstract

The present invention relates to a separated mold suitable for forming a complex reinforced housing made of composite material. The separated mold comprises a base plate, wherein a core mold is mounted on the base plate. The separated mold further comprises four side molds surrounding the core mold in the circumferential direction, wherein each side mold is detachably connected to the core mold; a female-mold embedding groove is provided on the base plate in the circumferential direction of the side molds, a first female mold is mounted in the female-mold embedding groove, and a first glue-injection gap is provided between the first female mold and the corresponding side dies; the first female mold is covered with a second female mold, a second glue-injection gap is provided between the second female mold and the core mold, and the first glue-injection gap is in communication with the second glue-injection gap; and the first female mold and the second female mold are enclosed with an outer frame. By means of the design of the separated mold suitable for forming a complex reinforced housing made of composite material, a complex box is integrally formed, redundant machining procedures are omitted, and additional machining of inner and outer molded surfaces is not required, thus simplifying the process flow, reducing the preparation difficulty and cost, and shortening the preparation period.

Description

A block die suitable for molding complex reinforced composite shells Technical Field

[0001] The invention relates to the field of composite material forming die manufacturing, in particular to a block die suitable for forming a complex reinforced composite material shell. Background Art

[0002] Composite materials are materials composed of two or more different substances combined in various ways. They leverage the strengths of each material, overcome the shortcomings of a single material, and expand their application range. They feature lightweight, high strength, easy processing and molding, excellent elasticity, and good chemical and weather resistance. Composite materials can be formed using a variety of methods, including hand lay-up, injection molding, filament winding, compression molding, pultrusion, RTM, autoclave molding, diaphragm molding, transfer molding, reaction injection molding, expansion molding, and stamping.

[0003] Composite materials are developing rapidly and are widely used in various products. Among them is a type of hollow product with a single-sided opening, in which several or more surfaces inside and outside are distributed with reinforcing ribs or thickened areas, resulting in uneven and irregular inner and outer surfaces of the product. Whether using hand lay-up, infusion process or vacuum pressure process, a mold is required. If a positive mold is used for preparation, the outer surface needs to be processed; if a negative mold is used for preparation, the fabric / one-way cloth is not easy to lay, and the inner surface needs to be processed, and the internal ribs are vertical and horizontal, which makes processing more difficult; moreover, due to the existence of the external thickened area, the overall negative mold cannot be demoulded. If an overall negative mold is used, the thickness of the four walls and bottom surface needs to be increased as a whole, and finally the outer surface also needs to be processed. The above methods use only negative molds or positive molds. The process is complicated and the process is long, resulting in increased costs.

[0004] Therefore, in order to solve the above problems, the present invention urgently needs to provide a block mold suitable for forming complex reinforced composite shells.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide a block mold suitable for the molding of complex reinforced composite material shells. Through the design of the block mold suitable for the molding of complex reinforced composite material shells, the one-piece molding of complex boxes is achieved, unnecessary processing steps are eliminated, and the internal and external surfaces do not require additional machining, thereby simplifying the process flow, reducing the preparation difficulty, reducing costs, and improving production efficiency.

[0007] The present invention provides a block mold suitable for molding a complex reinforced composite shell, comprising a base plate, a core mold mounted on the base plate, and four side molds surrounding the core mold, each side mold being detachably connected to the core mold;

[0008] A female mold embedding groove is provided on the bottom plate along the circumference of the side mold, a first female mold is installed in the female mold embedding groove, a first glue injection gap is provided between the first female mold and the corresponding side mold, a second female mold is provided on the upper cover of the first female mold, a second glue injection gap is provided between the second female mold and the core mold, and the first glue injection gap and the second glue injection gap are connected;

[0009] The first female mold and the second female mold are wrapped with an outer frame;

[0010] The top of the core mold is provided with a first special-shaped groove

[0011] The outer end surface of the side mold is provided with a second special-shaped groove, and the second special-shaped groove extends upward to the upper end surface of the side mold 8;

[0012] The inner surface of the first female mold is provided with a third special-shaped groove;

[0013] The lower end surface of the second female mold is provided with a fourth special-shaped groove.

[0014] Preferably, the core mold is fixed to the base plate via a detachable connecting piece, and the detachable connecting piece is a hexagonal screw.

[0015] Preferably, the core mold is provided with core mold protrusions on the four side walls, and each side mold is provided with a side mold slot corresponding to each core mold protrusion.

[0016] Preferably, a first handrail groove is designed on the inner side of each side mold.

[0017] Preferably, a second handrail groove is provided on the circumference of the outer side wall of the first female mold, and a third handrail groove is provided on the circumference of the outer side wall of the second female mold.

[0018] Preferably, the inner side wall of the outer frame is provided with a first inclined surface, and the outer side walls of the first female mold and the second female mold are provided with a second inclined surface and a third inclined surface respectively matching the first inclined surface.

[0019] Preferably, the angle between the first inclined surface and the Y axis is 1-5°.

[0020] Preferably, an outer frame mounting groove is opened on the bottom plate, and the outer frame mounting groove is arranged along the circumference of the female mold embedding groove. A plug-in protrusion extending downward is provided circumferentially at the bottom of the outer frame, and a plug-in hole corresponding to the plug-in protrusion is opened at the bottom of the outer frame mounting groove.

[0021] Preferably, the outer frame is provided with two armrest cross bars.

[0022] The present invention also provides a method for preparing a segmented mold suitable for integrally forming a complex reinforced composite material based on any one of the above-mentioned methods, comprising the following steps:

[0023] preparing a base plate;

[0024] Prepare a core mold, open a first special-shaped groove on the top of the core mold, and fix the core mold on the base plate;

[0025] Prepare a side mold that matches the core mold, open a second special-shaped groove on the outer end surface of the side mold, and connect the side mold and the core mold through the side mold slot and the core mold protrusion;

[0026] A female mold embedding groove is provided on the bottom plate along the circumference of the side mold;

[0027] Prepare a first female mold, open a third special-shaped groove on the inner surface of the first female mold, and fix the first female mold in the female mold embedding groove; prepare a second female mold, open a fourth special-shaped groove on the lower end surface of the second female mold, cover the second female mold on the first female mold to prepare an outer frame, and put the outer frame on the outside of the first female mold and the second female mold.

[0028] The present invention provides a block mold suitable for molding complex reinforced composite shells, which has the following improvements compared to the prior art:

[0029] 1. The present invention provides a segmented mold suitable for molding complex reinforced composite shells. During molding, the outer frame can press the first female mold toward the center under pressure, forming multi-directional simultaneous pressure, which is beneficial to the molding of the box body; when demolding, the core mold is first pulled out, and then the two smaller side molds are first pulled out toward the center, and then taken out in the vertical direction, and finally the two larger side molds are taken out to complete the demolding of the side molds; the first female mold is removed along the diagonal line through the handle to complete the demolding of the entire box body.

[0030] 2. This invention provides a segmented mold suitable for molding complex reinforced composite shells. By adding a pressurized sealing tool, the mold can be used in closed-mold molding processes such as compression molding and RTM, improving the mold's applicability and efficiency. This patented closed-mold molding process, designed specifically for this type of product, utilizes a suitable mold to eliminate the need for additional machining of internal and external surfaces, simplifying the process, reducing manufacturing complexity, costs, and cycle time. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] FIG1 is a schematic diagram (sectional view) of a composite material shell forming mold according to the present invention;

[0033] FIG2 is a schematic diagram (stereoscopic view) of the first female mold and the second female mold in the present invention;

[0034] FIG3 is a schematic diagram (stereoscopic view) of the core mold and side mold structure of the present invention;

[0035] FIG4 is a schematic diagram (sectional view) of the outer frame plug-in protrusion of the present invention;

[0036] FIG5 is a schematic diagram (sectional view) of the bottom plate plug-in hole of the present invention.

[0037] Description of reference numerals:

[0038] 1. Outer frame; 2. First female mold; 3. Second female mold; 4. Female mold embedding groove; 5. Outer frame handle; 7. Handrail crossbar; 8. Side mold; 9. Core mold protrusion; 10. Side mold slot; 11. Core mold; 12. Bottom plate; 13. First handrail groove; 14. Second handrail groove; 15. Third handrail groove; 16. Outer frame mounting groove; 17. Plug-in protrusion; 18. Plug-in hole; 201. Third special-shaped groove; 301. Fourth special-shaped groove; 801. Second special-shaped groove; 1101. First special-shaped groove. DETAILED DESCRIPTION

[0039] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "liquid level," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0042] As shown in FIG1 , a block mold suitable for forming a complex reinforced composite shell includes a base plate 12, a core mold 11 is installed on the base plate 12, and four side molds 8 are circumferentially arranged around the core mold 11, and each side mold 8 is detachably connected to the core mold 11; a female mold embedding groove 4 is provided on the base plate 12 and arranged circumferentially along the side mold 8, a first female mold 2 is installed in the female mold embedding groove 4, a first glue injection gap is provided between the first female mold 2 and the corresponding side mold 8, a second female mold 3 is provided on the upper cover of the first female mold 2, a second glue injection gap is provided between the second female mold 3 and the core mold 11, and the first glue injection gap and the second glue injection gap are connected;

[0043] The first female mold 2 and the second female mold 3 are wrapped with an outer frame 1;

[0044] A first special-shaped groove 1101 is provided on the top of the core mold 11;

[0045] The outer end surface of the side mold 8 is provided with a second special-shaped groove 801, and the second special-shaped groove 801 extends upward to the upper end surface of the side mold 8;

[0046] The inner surface of the first female mold 2 is provided with a third special-shaped groove 201;

[0047] A fourth special-shaped groove 301 is provided on the lower end surface of the second female mold 3 .

[0048] The block mold provided by the present invention is used for molding the inner surface of the box. Considering the demoulding problem,

[0049] The male mold is divided into five parts: a core mold and four peripheral molds. The core mold is fixed to the base plate with hexagon socket screws and forms the majority of the bottom shape of the interior. The four corresponding side molds form the perimeter and remaining bottom shape of the box. The core mold has elongated protrusions around its perimeter, while the four side molds have corresponding grooves for positioning. To demold, the core mold is first withdrawn, followed by the two smaller side molds, which are first pulled toward the center and then vertically removed. Finally, the two larger side molds are removed to complete the male mold release. The female mold, which forms the exterior of the box, consists of a first and second female mold. The first and second female molds feature recessed handles for easy installation and removal. The bottom of the first female mold mates with the female mold recesses on the base plate for positioning. The outer frame mates with the first and second female molds to facilitate mold closing. When pressurized, the outer frame forces the inner female molds toward the center, creating simultaneous multi-directional pressure to facilitate box molding. A sealing groove is provided between the bottom of the outer frame and the base plate to ensure a complete seal. The block mold provided by the present invention utilizes a split mold to realize the overall demoulding of the box body, so that the complex box body can be formed in one piece. The use of a suitable mold eliminates the need for additional machining of the inner and outer surfaces, simplifies the process flow, reduces the difficulty of preparation, reduces costs, shortens the preparation cycle, and improves production efficiency.

[0050] As shown in FIG3 , the core mold 11 is fixedly connected to the base plate 12 via a detachable connecting piece, and the detachable connecting piece is a hexagonal screw.

[0051] The block mold provided by the present invention has a core mold fixed to the bottom plate by an inner hexagonal screw and is used to form most of the bottom shape inside the box body. When demoulding, the core mold can be pulled out together with the bottom plate, which is convenient for demoulding.

[0052] As shown in FIG3 , the core mold 11 is provided with core mold protrusions 9 on its four side walls, and each side mold 8 is provided with a side mold slot 10 corresponding to each core mold protrusion 9 .

[0053] The block mold provided by the present invention has side molds used to form the surrounding areas inside the box and the remaining bottom shape except the core mold area. When demolding, after the core mold is pulled out, the two smaller side molds are first pulled out toward the center, and then taken out in the vertical direction, and then the two larger side molds are taken out in the same way to complete the demolding of the side mold.

[0054] As shown in FIG3 , a first handrail groove 13 is designed on the inner side surface of each side mold 8 .

[0055] The block mold provided by the present invention can be demoulded by pulling out the core mold and then taking out the side molds inwards through the first handrail grooves, thereby facilitating demoulding of the side molds.

[0056] As shown in FIG1 , a second handrail groove 14 is provided on the circumferential outer wall of the first female mold 2 , and a third handrail groove 15 is provided on the circumferential outer wall of the second female mold 3 .

[0057] The present invention provides a segmented mold, wherein the female mold is used for forming the outer portion of the box body and is composed of a first female mold and a second female mold. When demoulding, the first female mold and the second female mold can be taken outward and upward through the second handrail groove and the third handrail groove, which is convenient for installation and disassembly.

[0058] As shown in FIG2 , the inner side wall of the outer frame 1 is provided with a first inclined surface, and the outer side walls of the first female mold 2 and the second female mold 3 are provided with a second inclined surface and a third inclined surface respectively matching the first inclined surface.

[0059] The block mold provided by the present invention has an inclined surface design, which enables the outer frame to press the internal first female mold toward the center under pressure, forming simultaneous pressure in multiple directions, which is beneficial to the molding of the box body.

[0060] As shown in FIG1 , the angle between the first inclined surface and the Y axis is 1-5°.

[0061] For the block mold provided by the present invention, when the outer frame is pressurized with F, the female mold is subjected to a force F=F★L★sinθ / 2★(L+L) (θ is the angle between the inclined surface and the Y axis of the bottom plate, the outer frame is L1 long and L2 wide, the downward load of the outer frame is F, and F is the left oblique downward force exerted by the L1 side on the female mold).

[0062] As shown in Figure 1, an outer frame mounting groove 16 is opened on the bottom plate 12, and the outer frame mounting groove 16 is arranged circumferentially along the female mold embedding groove 4. A downward extending plug-in protrusion 17 is provided circumferentially at the bottom of the outer frame 1, and a plug-in hole 18 is opened at the bottom of the outer frame mounting groove 16, which corresponds one-to-one with the plug-in protrusion 17.

[0063] The block mold provided by the present invention can make the outer frame and the base plate detachably connected through the design of the outer frame mounting groove, which is convenient for mold closing; the overall sealing of the mold can be ensured through the design of the plug-in holes and plug-in protrusions; the use of a sealing airbag to cover the product further solves the sealing problem, allowing the mold to be used in molding and RTM molding processes, with strong applicability and multi-purpose functions.

[0064] As shown in FIG. 1 , the outer frame 1 is provided with a handrail crossbar 7 .

[0065] The block mold provided by the present invention has a design of the handrail crossbar so that the outer frame can be directly removed during demoulding, thereby facilitating installation and disassembly of the outer frame.

[0066] As shown in Figures 1, 2, 3, 4 and 5, a method for preparing a block mold suitable for integrally forming a complex reinforced composite material is as follows:

[0067] preparing a base plate 12;

[0068] Prepare a core mold 11, open a first special-shaped groove 1101 on the top of the core mold 11, and fix the core mold 11 on the bottom plate 12;

[0069] Prepare a side mold 8 that matches the core mold 11, open a second special-shaped groove 801 on the outer end surface of the side mold 8, and connect the side mold 8 and the core mold 11 through the side mold slot 10 and the core mold protrusion 9;

[0070] A female mold embedding groove 4 is provided on the bottom plate 12 along the circumference of the side mold 8;

[0071] Prepare a first female mold 2, open a third special-shaped groove 201 on the inner surface of the first female mold 2, and fix the first female mold 2 in the female mold embedding groove 4;

[0072] Prepare a second female mold 3, open a fourth special-shaped groove 301 on the lower end surface of the second female mold 3, and cover the second female mold 3 on the first female mold 2;

[0073] An outer frame 1 is prepared and placed outside the first female mold 2 and the second female mold 3 .

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A block mold suitable for integral molding of complex reinforced composite materials, characterized by: It comprises a bottom plate (12), a core mold (11) is mounted on the bottom plate (12), and four side molds (8) surrounding the core mold (11), each side mold (8) being detachably connected to the core mold (11); A female mold embedding groove (4) is provided on the bottom plate (12) and is arranged along the circumference of the side mold (8). A first female mold (2) is installed in the female mold embedding groove (4). A first glue injection gap is provided between the first female mold (2) and the corresponding side mold (8). A second female mold (3) is provided on the upper cover of the first female mold (2). A second glue injection gap is provided between the second female mold (3) and the core mold (11). The first glue injection gap is connected to the second glue injection gap. The first female mold (2) and the second female mold (3) are wrapped with an outer frame (1); A first special-shaped groove (1101) is provided on the top of the core mold (11); The outer end surface of the side mold (8) is provided with a second special-shaped groove (801), and the second special-shaped groove (801) extends upward to the upper end surface of the side mold (8); The inner surface of the first female mold (2) is provided with a third special-shaped groove (201); A fourth special-shaped groove (301) is provided on the lower end surface of the second female mold (3).

2. The block mold suitable for integral molding of complex reinforced composite materials according to claim 1, characterized in that: The core mold (11) is fixedly connected to the bottom plate (12) via a detachable connecting piece.

3. The block mold suitable for integral molding of complex reinforced composite materials according to claim 2, characterized in that: The side walls around the core mold (11) are provided with core mold protrusions (9), and each side mold (8) is provided with a side mold slot (10) corresponding to each core mold protrusion (9).

4. The block mold suitable for integral molding of complex reinforced composite materials according to claim 3 is characterized in that: The inner side surface of each side mold (8) is designed with a first handrail groove (13).

5. The block mold suitable for integral molding of complex reinforced composite materials according to claim 4, characterized in that: A second handrail groove (14) is provided in the circumferential direction of the outer side wall of the first female mold (2), and a third handrail groove (15) is provided in the circumferential direction of the outer side wall of the second female mold (3).

6. The block mold suitable for integral molding of complex reinforced composite materials according to claim 5, characterized in that: The inner side wall of the outer frame (1) is provided with a first inclined surface, and the outer side walls of the first female mold (2) and the second female mold (3) are provided with a second inclined surface and a third inclined surface respectively matching the first inclined surface.

7. The block mold suitable for integral molding of complex reinforced composite materials according to claim 6, characterized in that: The included angle between the first inclined surface and the Y axis is 1-5°.

8. The block mold suitable for integral molding of complex reinforced composite materials according to claim 7, characterized in that: An outer frame installation groove (16) is provided on the bottom plate (12), and the outer frame installation groove (16) is arranged along the circumference of the female mold embedding groove (4). A plug-in protrusion (17) extending downward is provided on the circumference of the bottom of the outer frame (1). A plug-in hole (18) corresponding to the plug-in protrusion (17) is provided at the bottom of the outer frame installation groove (16).

9. The block mold suitable for integral molding of complex reinforced composite materials according to claim 8, characterized in that: The outer frame (1) is provided with a handrail crossbar (7).

10. A method for preparing a block mold suitable for integral molding of complex reinforced composite materials based on claim 9, characterized in that: preparing a base plate (12); A core mold (11) is prepared, a first special-shaped groove (1101) is formed on the top of the core mold (11), and the core mold (11) is fixed on a bottom plate (12); A side mold (8) matching the core mold (11) is prepared, a second special-shaped groove (801) is provided on the outer end surface of the side mold (8), and the side mold (8) and the core mold (11) are plug-connected through the side mold slot (10) and the core mold protrusion (9); A female mold embedding groove (4) is provided on the bottom plate (12) and is arranged along the circumference of the side mold (8); Prepare a first female mold (2), open a third special-shaped groove (201) on the inner surface of the first female mold (2), and fix the first female mold (2) in the female mold embedding groove (4); Prepare a second female mold (3), open a fourth special-shaped groove (301) on the lower end surface of the second female mold (3), and cover the second female mold (3) on the first female mold (2); An outer frame (1) is prepared, and the outer frame (1) is mounted outside the first female mold (2) and the second female mold (3).

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