Preparation Mold and Preparation Method for a Multi-Cavity Beam

Abstract

The present invention discloses a preparation mold and a preparation method for a multi-cavity beam. The material of the multi-cavity beam is a carbon fiber composite material. The extending direction of the multi-cavity beam is the first direction, and the first direction includes a first branch direction and a second branch direction which are oppositely arranged. The preparation mold includes: an outer mold, which includes a first mold body and a second mold body that are butt-jointed, and the first mold body and the second mold body enclose a molding space; a core module disposed in the molding space, which includes a plurality of core molds, and at least one core mold is a variable cross-section mold. The variable cross-section mold includes a first sub-mold and a second sub-mold. The first sub-mold includes a first variable cross-section section that tapers in the first branch direction, and the second sub-mold includes a second variable cross-section section that tapers in the second branch direction. The first sub-mold is butted against the second sub-mold along the first branch direction, and the cross-sectional area of the middle region of the variable cross-section mold is smaller than that of the two end regions. The above preparation mold can realize the integral curing molding of the multi-cavity beam and can be easily demolded.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and particularly relates to a preparation mold and a preparation method for a multi-cavity beam. Background Art

[0002] The carbon fiber composite beam is usually formed by pre-preg molding. However, for a beam with inconsistent cross-sectional shapes in the extending direction, such as a beam with large cross-sections at both ends and a small cross-section in the middle, there are great difficulties in the preparation and demolding of its mold.

[0003] Therefore, how to provide a solution to overcome or alleviate the above defects is still a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0004] The purpose of the present invention is to provide a preparation mold and a preparation method for a multi-cavity beam. Among them, the preparation mold can realize the integral curing molding of the multi-cavity beam and can be easily demolded.

[0005] To solve the above technical problems, the present invention provides a preparation mold for a multi-cavity beam. The material of the multi-cavity beam is a carbon fiber composite material. The extending direction of the multi-cavity beam is the first direction, and the first direction includes a first branch direction and a second branch direction which are oppositely arranged. The preparation mold includes: an outer mold, including a first mold body and a second mold body which are butted against each other, and the first mold body and the second mold body enclose a molding space; a core module disposed in the molding space, including a plurality of core molds, at least one of the core molds being a variable cross-section mold. The variable cross-section mold includes a first sub-mold and a second sub-mold. The first sub-mold includes a first variable cross-section section that tapers in the first branch direction, and the second sub-mold includes a second variable cross-section section that tapers in the second branch direction. The first sub-mold is butted against the second sub-mold along the first branch direction, and the cross-sectional area of the middle region of the variable cross-section mold is smaller than that of the two end regions.

[0006] Adopting this solution, the variable cross-section mold is a split first sub-mold and second sub-mold, which can facilitate the processing and preparation of the first sub-mold and the second sub-mold; the first sub-mold includes a first variable cross-section section, and the second sub-mold includes a second variable cross-section section. The tapering directions of the first variable cross-section section and the second variable cross-section section are opposite. After the two are butted against each other, a variable cross-section mold with a thin middle and thick ends can be formed, and then a variable cross-section inner cavity with a thin middle and thick ends can be processed and prepared to realize the integral molding of a multi-cavity beam with a complex cavity structure, which is beneficial to ensuring the molding quality and mechanical properties of the multi-cavity beam; when demolding, the first sub-mold can be pulled out along the second branch direction, and the second sub-mold can be pulled out along the first branch direction. There will be no interference between the first sub-mold, the second sub-mold and the cavity wall of the already molded multi-cavity beam, and demolding can be easily achieved.

[0007] Optionally, a plurality of insertion portions are arranged on the first split mold in a staggered manner in the first branch direction, and a plurality of mating portions are arranged on the second split mold in a staggered manner in the second branch direction. The number of the insertion portions is the same as that of the mating portions, and each of the insertion portions is inserted into each of the mating portions in a one-to-one correspondence.

[0008] Optionally, it further includes a first detachable connecting member, and the first split mold and the second split mold are further connected by the first detachable connecting member.

[0009] Optionally, the first split mold includes a first docking surface arranged at an angle with the first branch direction, and the second split mold includes a second docking surface arranged at an angle with the second branch direction. The first docking surface is parallel to the second docking surface, and the first split mold and the second split mold are docked through the first docking surface and the second docking surface; it further includes a second detachable connecting member, and the first split mold and the second split mold are further connected by the second detachable connecting member.

[0010] Optionally, both the first split mold and the second split mold are provided with a first hollow structure for operating the second detachable connecting member.

[0011] Optionally, the docking direction of the first mold body and the second mold body is the second direction, and the second direction is arranged at an angle with the first direction. The multi-cavity beam further includes a third direction, and the third direction is arranged at an angle with both the first direction and the second direction; among the core molds, at least some of the core molds are arranged in the third direction, and a flexible layer is arranged on the peripheral wall surface of the core mold that is not adjacent to the outer mold in the third direction.

[0012] Optionally, at least some of the core molds are provided with heating components.

[0013] Optionally, the heating component is a heating pipe, and a heating fluid is passed through the heating pipe.

[0014] Optionally, at least some of the core molds are provided with temperature sensors.

[0015] Optionally, flow blocking grooves are arranged at both ends of each core mold in the first direction.

[0016] Optionally, limiting blocks are arranged on the circumferences of the core molds.

[0017] Optionally, the first mold body includes a first bottom wall portion and two relatively arranged first side wall portions, and both of the first side wall portions are installed on the first bottom wall portion; the second mold body includes a second bottom wall portion and two relatively arranged second side wall portions, and both of the second side wall portions are lapped on the second bottom wall portion; during the docking and assembly process of the first mold body and the second mold body, the first side wall portion can act on the second side wall portion to drive the second side wall portion to displace towards the core module group.

[0018] Optionally, the docking direction of the first mold body and the second mold body is the second direction, and at least one of the first side wall portion and the second side wall portion has an inclined surface disposed at an angle to the second direction.

[0019] Optionally, a plurality of bumps are provided on the surface of the first side wall portion facing the second side wall portion.

[0020] Optionally, a second hollow structure is provided on the first bottom wall portion and / or the second bottom wall portion.

[0021] Optionally, a mold locking device is further included for connecting the first mold body and the second mold body.

[0022] The present invention also provides a method for manufacturing a multi-chamber beam, including the following steps: Step S1, configuring the manufacturing mold for the multi-chamber beam as described above; Step S2, winding carbon fiber prepreg around the circumference of each core mold and winding carbon fiber prepreg around the circumference of the core module group; Step S3, installing the core module group wound with prepreg between the first mold body and the second mold body, and fixing the first mold body and the second mold body; Step S4, after the carbon fiber prepreg is cured, removing the manufacturing mold. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of a specific embodiment of the manufacturing mold for the multi-chamber beam provided by the present invention;

[0024] Figure 2 is Figure 1 exploded view of;

[0025] Figure 3 is a schematic structural diagram of a variable cross-section mold in one form;

[0026] Figure 4 is Figure 3 partial enlarged view of;

[0027] Figure 5 is a schematic structural diagram of a variable cross-section mold in another form;

[0028] Figure 6 is a schematic structural diagram of an equal cross-section mold in one form;

[0029] Figure 7 This is a flowchart of the preparation method of the multi-chamber beam provided by the present invention.

[0030] The description of the reference numerals is as follows:

[0031] 1 outer mold, 11 first mold body, 111 first bottom wall portion, 111a second hollow structure, 111b first lifting ring, 112 first side wall portion, 112a first inclined surface, 112b recessed portion, 12 second mold body, 121 second bottom wall portion, 121a slot portion, 121b second lifting ring, 122 second side wall portion, 122a second inclined surface;

[0032] 2 core module group, 21 core mold, 211 variable cross-section mold, 211a first split mold, 211a-1 first insertion portion, 211a-2 second insertion portion, 211a-3 first docking surface, 211a-4 first hollow structure, 211b second split mold, 211b-1 first mating portion, 211b-2 second mating portion, 211b-3 second docking surface, 211b-4 pressing groove portion, 212 equal cross-section mold, 213 heating component, 214 temperature sensor, 215 choke groove, 215a first groove section, 215b second groove section, 216 limiting block, 216a axial stop, 216b radial stop;

[0033] 3 mold clamping device. Detailed implementation manners

[0034] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] In the embodiments of the present invention, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", and "third" may explicitly or implicitly include one or more of such features.

[0036] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, "connection" may be a detachable connection or a non-detachable connection; it may be a direct connection or an indirect connection through an intermediate medium.

[0037] The orientation terms mentioned in the embodiments of the present invention, such as "upper", "lower", "inner", "outer", etc., are only with reference to the directions in the accompanying drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as a limitation to the embodiments of the present invention. In addition, unless otherwise specified in this application, the term "a plurality of" herein means two or more; and when using "a plurality of" to represent the quantity of several components, it does not represent the mutual relationship in quantity of these components.

[0038] In the description of the embodiments of the present invention, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including such element.

[0039] In the embodiments of the present invention, "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0040] In the description of the embodiments of the present invention, a multi-chamber beam specifically refers to a beam body including a plurality of internal chambers, each internal chamber is independent of each other, and each internal chamber extends along the extension direction of the multi-chamber beam. For the convenience of description, in the embodiments of the present invention, the extension direction of the multi-chamber beam may be referred to as the first direction, and the first direction may include a first branch direction and a second branch direction that are oppositely arranged. In specific applications, the above-mentioned multi-chamber beam may be a cross beam of a bogie, a side beam of a track vehicle body or a beam body applied in other scenarios, and its material may be a carbon fiber composite material.

[0041] In each internal cavity of the multi-cavity beam, at least one internal cavity is a variable cross-section cavity, specifically: in the first direction, the cross-sections at both ends of the variable cross-section cavity are large, and the cross-section in the middle is small, that is, thick at both ends and thin in the middle. To form an internal cavity of this form, a variable cross-section mold with large cross-sections at both ends and a small cross-section in the middle is required. However, this form of variable cross-section mold faces the problem of being unable to be demolded after the multi-cavity beam is processed and formed. To solve this technical problem, a common solution is to form the multi-cavity beam in segments to avoid the problem of difficult demolding, but this will lead to a complex forming process of the multi-cavity beam, low processing efficiency, and may affect the quality of the multi-cavity beam.

[0042] For this reason, the embodiments of the present invention provide a preparation mold and a forming method for a multi-cavity beam, which can preferably realize the integral forming of a multi-cavity beam with a variable cross-section cavity, facilitate the preparation of the multi-cavity beam, ensure the quality and mechanical properties of the multi-cavity beam, and can also be easily demolded. For specific details, please refer to the following description.

[0043] Embodiment 1

[0044] Please refer to Figures 1-6 , Figure 1 which is a schematic structural diagram of a specific embodiment of the preparation mold for the multi-cavity beam provided by the present invention, Figure 2 is Figure 1 's exploded view, Figure 3 is a schematic structural diagram of a form of variable cross-section mold, Figure 4 is Figure 3 's partial enlarged view, Figure 5 is a schematic structural diagram of another form of variable cross-section mold, Figure 6 is a schematic structural diagram of a form of equal cross-section mold.

[0045] As Figure 1 and Figure 2 shown, the embodiments of the present invention provide a preparation mold for a multi-cavity beam, including an outer mold 1 and a core module 2.

[0046] The outer mold 1 includes a split first mold body 11 and a second mold body 12. The first mold body 11 and the second mold body 12 can be butted against each other to enclose a molding space (not marked in the figure). For the convenience of description, the butting direction of the first mold body 11 and the second mold body 12 can be called the second direction. In the Figure 1 shown structural diagram, the second direction is the up-and-down direction, and the first mold body 11 can be butted against the second mold body 12 from top to bottom.

[0047] The second direction and the first direction can be set at an angle, and the angle value of this angle is not limited here. Specifically, it can be determined in combination with relevant parameters such as the wall thickness of the multi-cavity beam. In some embodiments, the second direction and the first direction can be perpendicular to each other.

[0048] The core module 2 can be arranged in the molding space and is used for processing and preparing the internal cavities of the multi-chamber beam. The core module 2 includes a plurality of core molds 21, and each core mold 21 can form an internal cavity. Here, the embodiments of the present invention do not limit the number of core molds 21. In practical applications, those skilled in the art can determine it according to specific usage requirements, as long as the usage effect can be satisfied. In Figure 1 and Figure 2 In the implementation manners, the number of core molds 21 can be five. Of course, it can also be other numbers.

[0049] Among the core molds 21, at least one core mold 21 is a variable cross-section mold 211. Specifically, the cross-sectional area of the middle region of the variable cross-section mold 211 is smaller than that of the two end regions. That is to say, the variable cross-section mold 211 has a structure that is thin in the middle and thick at both ends. In this way, a variable cross-section cavity that is thin in the middle and thick at both ends can be processed and formed.

[0050] Furthermore, as shown in Figure 3 and Figure 4 , the variable cross-section mold 211 includes a first sub-mold 211a and a second sub-mold 211b. The first sub-mold 211a includes a first variable cross-section segment that is tapered in the first branch direction, and the second sub-mold 211b includes a second variable cross-section segment that is tapered in the second branch direction. The first sub-mold 211a is butted against the second sub-mold 211b along the first branch direction. That is to say, the first sub-mold 211a can be butted against the second sub-mold 211b along the direction in which the first variable cross-section segment is tapered; similarly, since the first branch direction and the second branch direction are opposite directions, for the second sub-mold 211b, the second sub-mold 211b is also butted against the first sub-mold 211a along the second branch direction. That is to say, the second sub-mold 211b is also butted against the first sub-mold 211a along the direction in which the second variable cross-section segment is tapered.

[0051] Adopting this solution, in the embodiments of the present invention, the variable cross-section mold 211 is set as the split first sub-mold 211a and second sub-mold 211b, which can facilitate the processing and preparation of the first sub-mold 211a and the second sub-mold 211b; the first sub-mold 211a includes a first variable cross-section segment, and the second sub-mold 211b includes a second variable cross-section segment. The directions in which the first variable cross-section segment and the second variable cross-section segment are tapered are opposite. After the two are butted, a variable cross-section mold 211 that is thin in the middle and thick at both ends can be formed, and then a variable cross-section inner cavity that is thin in the middle and thick at both ends can be processed and prepared to realize the one-piece molding of a multi-chamber beam with a complex cavity structure type, which is beneficial to ensuring the molding quality and mechanical properties of the multi-chamber beam; when demolding, the first sub-mold 211a can be pulled out along the second branch direction, and the second sub-mold 211b can be pulled out along the first branch direction. There will be no interference between the first sub-mold 211a, the second sub-mold 211b and the cavity wall of the already formed multi-chamber beam, and demolding can be easily realized.

[0052] Here, the embodiments of the present invention do not limit the shapes of the cross-sections perpendicular to the first direction of the outer mold 1 and each core mold 21. In practical applications, those skilled in the art can design according to the structural form of the multi-chamber beam, as long as the requirements for use can be met. In the embodiment shown in the drawings, the cross-sections perpendicular to the first direction of the outer mold 1 and each core mold 21 are basically rectangular. At this time, the formed multi-chamber beam is basically a rectangular beam, and the cross-sections perpendicular to the first direction of its internal chambers are also basically rectangular.

[0053] When the first split mold 211a and the second split mold 211b are combined to form the variable cross-section mold 211, the first split mold 211a and the second split mold 211b can be in an abutting contact relationship, that is, they may not be connected to each other. At this time, the first split mold 211a and the second split mold 211b can be fixed to the outer mold 1 (or other fixedly arranged components) to position the relative positions of the first split mold 211a and the second split mold 211b.

[0054] In addition, the first split mold 211a and the second split mold 211b can also be fixed by a detachable connection method, such as bolt connection, snap connection, etc. In this embodiment, when it is necessary to combine and form the variable cross-section mold 211, the first split mold 211a and the second split mold 211b can be connected to determine their relative positions; when demolding, the connection relationship between the first split mold 211a and the second split mold 211b can be released first, and then the first split mold 211a and the second split mold 211b can be removed in different directions.

[0055] Here, the embodiments of the present invention do not limit the specific structural form of the variable cross-section mold 211. In practical applications, those skilled in the art can determine it in combination with specific usage requirements. For the convenience of understanding, the following embodiments of the present invention will illustrate the possible structural forms of the variable cross-section mold 211 in combination with two specific embodiments.

[0056] In the first embodiment, as Figure 3 and Figure 4 shown, the first split mold 211a can be configured with a first insertion portion 211a-1 and a second insertion portion 211a-2 that are misaligned in the first branch direction, and the second split mold 211b can be configured with a first mating portion 211b-1 and a second mating portion 211b-2 that are misaligned in the second branch direction. The first insertion portion 211a-1 can be inserted into the second mating portion 211b-2, and the second insertion portion 211a-2 can be inserted into the second mating portion 211b-2 to assemble and combine the first split mold 211a and the second split mold 211b.

[0057] The specific structural forms of the first plugging part 211a-1, the second plugging part 211a-2, the first mating part 211b-1, and the second mating part 211b-2 are not limited herein, as long as they can achieve the technical effect of the aforementioned plugging and fixing.

[0058] In Figure 3 the embodiment, the first plugging part 211a-1 is the end part of the first split mold 211a in the first branch direction, which is basically in an "∠" shape, and the first mating part 211b-1 is a groove shape basically consistent with the structural form of the end part. The first plugging part 211a-1 can be inserted into the first mating part 211b-1; in Figure 4 the embodiment, the second plugging part 211a-2 can be rod-shaped, the second mating part 211b-2 can be a counterbore shape, and the second plugging part 211a-2 can be inserted into the second mating part 211b-2. With this connection method, the first split mold 211a and the second split mold 211b can be positioned and connected in a direction perpendicular to the first direction; taking Figure 3 the perspective in

[0059] as a reference, the first split mold 211a and the second split mold 211b can be positioned and connected in the second direction.

[0060] It should be understood that the number of plugging parts and mating parts is not limited to two. That is to say, the first split mold 211a can actually form more plugging parts, and the second split mold 211b can also form more mating parts. A one-to-one plugging and assembling relationship can be maintained between each plugging part and each mating part.

[0060] Furthermore, it may further include a first detachable connecting member (not shown in the figure). The first detachable connecting member can specifically be a threaded connecting member, such as a bolt + nut, etc. Or, the first detachable connecting member can also be a plugging member, such as a pin + split pin, etc.; the first split mold 211a and the second split mold 211b can also be connected by the first detachable connecting member to achieve the fixed connection of the first split mold 211a and the second split mold 211b in the first direction.

[0061] Choke grooves 215 are arranged at both ends of the variable cross-section mold 211 in the first direction. The choke grooves 215 can play a role in choking flow, can limit the flow limit position of the carbon fiber prepreg in the first direction, and can better avoid the situation where the carbon fiber prepreg flows to the outside of the preparation mold. With such a setting, on the one hand, the waste of the carbon fiber prepreg can be reduced, so that the carbon fiber prepreg can be used as much as possible for the preparation and molding of the multi-chamber beam to ensure the molding quality of the multi-chamber beam. On the other hand, it is also beneficial to ensure the environment around the preparation mold.

[0062] The flow-blocking grooves 215 at the same end in the first direction can be formed in one of the first split mold 211a and the second split mold 211b, or can be formed in both the first split mold 211a and the second split mold 211b simultaneously, which is specifically related to the structural forms of the first split mold 211a and the second split mold 211b. In Figure 3 In the embodiment of

[0063] Further, a limiting block 216 can also be arranged in the circumferential direction of the variable cross-section mold 211. The limiting block 216 is used to cooperate with the outer mold or with the adjacent core mold 21 to form a gap on the outer circumference of the variable cross-section mold 211. This gap can be used to accommodate the carbon fiber prepreg, and then the cavity wall of the multi-chamber beam can be formed.

[0064] The above-mentioned limiting block 216 can be installed on the variable cross-section mold 211, or on other core molds 21 adjacent to the variable cross-section mold 211, or can also be installed on the outer mold 1, as long as it can support the formation of the corresponding gap. The specific installation method of the limiting block 216 can be screw connection, welding, bonding, fusion welding, snap connection, etc.

[0065] The specific structural form of the limiting block 216 can be diverse and is not limited herein. In practical applications, those skilled in the art can set it according to specific needs as long as it can meet the usage requirements.

[0066] In Figure 4Two forms of the limiting block 216 are schematically shown therein. The first is the limiting block 216 located on the upper side, which is generally in an L shape and includes an axial stop 216a and a radial stop 216b arranged at an angle. The axial stop 216a is used to abut against other mandrels 21 or the outer mold 1 to limit the axial installation position of the variable cross-section mold 211, and the radial stop 216b is used to support other mandrels 21 or the outer mold 1 to limit the accommodation space of the carbon fiber prepreg. Moreover, a pressing groove portion 211b-4 can be provided on the upper end surface of the end portion of the second split mold 211b in the second branch direction, and the radial stop 216b can also be inserted into the pressing groove portion 211b-4 to limit the relative position of the first split mold 211a and the second split mold 211b in the direction perpendicular to the first direction. The second is the limiting block 216 located at other positions. These limiting blocks 216 are basically in the shape of a cuboid, and such a limiting block 216 can also function to radially support and form a carbon fiber prepreg accommodation gap. It can be understood that such a form of the limiting block 216 can also function to axially limit. At this time, a groove body needs to be provided on the mandrel 21 or the outer mold 1 adjacent to the variable cross-section mold 211 to cooperate with the limiting block 216.

[0067] In the second embodiment, as Figure 5 shown, the first split mold 211a can include a first docking surface 211a-3 arranged at an angle to the first branch direction, the second split mold 211b can include a second docking surface 211b-3 arranged at an angle to the second branch direction, the first docking surface 211a-3 and the second docking surface 211b-3 can be parallel, and the first split mold 211a and the second split mold 211b are docked through the first docking surface 211a-3 and the second docking surface 211b-3.

[0068] Here, the embodiments of the present invention do not limit the angles between the first docking surface 211a-3 and the second docking surface 211b-3 and the first direction. In specific practice, those skilled in the art can configure according to actual needs as long as the usage requirements can be met. In Figure 5 the embodiment, both the first docking surface 211a-3 and the second docking surface 211b-3 can be perpendicular to the first direction.

[0069] Furthermore, it further includes a second detachable connecting member (not shown in the figure). The structural form of the second detachable connecting member can be the same as that of the aforementioned first detachable connecting member, and no repetitive description will be made here; the first split mold 211a and the second split mold 211b can be connected by the second detachable connecting member to realize the fixed connection of the first split mold 211a and the second split mold 211b in the first direction.

[0070] Both the first split mold 211a and the second split mold 211b can be provided with a first hollow structure 211a-4 to facilitate the operation of the second detachable connecting member and also reduce the mass of the two split molds to achieve a lightweight design. The specific structural form of the first hollow structure 211a-4 is not limited herein as long as it can meet the usage requirements.

[0071] In addition to the variable cross-section mold 211, among the core molds 21 of the core mold group 2, at least one core mold 21 can also be an equal cross-section mold 212, that is to say, the internal cavities of the multi-chamber beam do not necessarily all be variable cross-section cavities and can also include equal cross-section cavities. The structure of the equal cross-section mold 212 can be referred to Figure 6 , and flow blocking grooves 215 can also be arranged at both ends of it in the first direction.

[0072] The multi-chamber beam can also include a third direction, and the third direction can be arranged at an angle with both the first direction and the second direction. In some embodiments, the third direction can be perpendicular to both the first direction and the second direction. Combining Figure 2 , the first direction defined in this application can also be understood as the length direction of the multi-chamber beam, the second direction can also be understood as the height direction of the multi-chamber beam, and the third direction can also be understood as the width direction of the multi-chamber beam.

[0073] Among the core molds 21, at least some of the core molds 21 are arranged in the third direction, that is to say, there are at least two cavities in the multi-chamber beam in the third direction.

[0074] Furthermore, in the third direction, there can be at least three core molds 21, and a flexible layer can be arranged on the peripheral wall surface of the core mold 21 that is not adjacent to the outer mold 1 in the third direction. The flexible layer can be specifically prepared from a flexible material such as silicone rubber. During molding, the flexible layer can generate a reaction force when pressed to provide sufficient pressure for the cavity walls of the internal cavities in the middle region of the multi-chamber beam in the third direction, so that the cavity walls in this region can have a better compaction effect and ensure the molding quality and external dimensions of the cavity walls in this region.

[0075] Taking Figure 1 the shown structural diagram as an example, that is, a flexible layer can be arranged on the outer peripheral wall of the core mold 21 at the center in the third direction. The thickness of the flexible layer is not limited herein.

[0076] In some alternative embodiments, at least some of the core molds 21 can also be provided with heating components 213 for heating the core molds 21, so as to ensure uniform heating of the internal region of the multi-chamber beam and facilitate improving the molding quality of the multi-chamber beam.

[0077] Here, the embodiments of the present invention do not limit the number and installation position of the heating components 213. In practical applications, those skilled in the art can configure them according to specific needs. Taking Figure 1 the shown structural diagram as an example, heating components 213 can be arranged in the four mandrels 21 around, while the mandrel 21 in the middle may not be provided with heating components 213.

[0078] The types of the above-mentioned heating components 213 can be diverse, and the embodiments of the present invention do not limit them, as long as they can meet the heating requirements. Exemplarily, the heating component 213 can be a heating pipe, and a heating fluid, such as hot oil, etc., can flow through the heating pipe; or, the heating component 213 can also be a resistance wire, etc.

[0079] Further, at least part of the mandrels 21 can be configured with temperature sensors 214 for detecting the temperature of the corresponding mandrels 21. The temperature sensors 214 can be used in cooperation with the aforementioned heating components 213 to control the heating power of the heating components 213.

[0080] Please continue to refer to Figure 1 and Figure 2 , the first die body 11 can include a first bottom wall portion 111 and two first side wall portions 112. The two first side wall portions 112 can be spaced apart in the third direction, and both of the two first side wall portions 112 can be installed on the first bottom wall portion 111 to form an inverted U-shaped structure in combination; the second die body 12 can include a second bottom wall portion 121 and two second side wall portions 122. The two second side wall portions 122 can be spaced apart in the third direction, and both of the two second side wall portions 122 can overlap on the second bottom wall portion 121, that is, the two second side wall portions 122 and the second bottom wall portion 121 are not fixedly connected.

[0081] During the docking and assembly process of the first die body 11 and the second die body 12, the first side wall portion 112 can act on the second side wall portion 122 to drive the second side wall portion 122 to move toward the core module 2, so as to apply a force in the third direction, which can apply sufficient pressure to the two side walls of the multi-chamber beam in the third direction, so that the side walls in this area can have a better compaction effect and can improve the forming quality and external dimensions of the side walls in this area.

[0082] In some alternative embodiments, at least one of the first side wall portion 112 and the second side wall portion 122 can have an inclined surface arranged at an angle with the second direction. In this way, the first side wall portion 112 can better push the second side wall portion 122 to move in the third direction. In Figure 1In the shown solution, a first inclined surface 112a may be provided on the first side wall portion 112, a second inclined surface 122a may be provided on the second side wall portion 122, and the first inclined surface 112a and the second inclined surface 122a may act on each other to push the second side wall portion 122a to displace; in addition, only one of the first inclined surface 112a and the second inclined surface 122a may exist.

[0083] Combined with Figure 2 , on the surface of the first side wall portion 112 facing the second side wall portion 122, a plurality of recessed portions 112b may be provided, and a convex block (not shown in the figure) may be provided in the recessed portion 112b. The convex block may further enhance the pushing effect of the first side wall portion 112 on the second side wall portion 122, thereby ensuring the compaction effect on the side walls of the multi-cavity beam. It should be understood that the convex block may also be provided on the second side wall portion 122.

[0084] Furthermore, a second hollow structure 111a may be provided on the first bottom wall portion 111 and / or the second bottom wall portion 121. With such a setting, on the one hand, the second hollow structure 111a can reduce the weight of the outer mold 1 to achieve a lightweight design, and on the other hand, the second hollow structure 111a can also provide an operation opening for the staff to disassemble the first sub-mold 211a and the second sub-mold 211b inside the molding space.

[0085] The specific structural form of the second hollow structure 111a is not limited herein either.

[0086] A slot portion 121a is further provided on the second bottom wall portion 121, and the first side wall portion 112 can be inserted into the slot portion 121a. At this time, the first mold body 11 and the second mold body 12 are docked in place. Then, a mold locking device 3 can be configured. The mold locking device 3 can specifically be a locking hook or the like, which is used to connect the first mold body 11 and the second mold body 12 to ensure the reliable connection between the first mold body 11 and the second mold body 12, and further ensure the pressing effect on the side walls of the multi-cavity beam.

[0087] The first mold body 11 may be provided with a first lifting ring 111b, and the second mold body 12 may be provided with a second lifting ring 121b. Through the first lifting ring 111b and the second lifting ring 121b, the transfer and transportation of the preparation mold provided by the present invention can be realized.

[0088] Embodiment 2

[0089] Please refer to Figure 7 , Figure 7 which is a flowchart of the preparation method of the multi-cavity beam provided by the present invention.

[0090] As Figure 7 shown, the present invention also provides a preparation method of a multi-cavity beam, including the following steps S1 to S4.

[0091] Step S1, configure the preparation mold for the multi-chamber beam involved in Embodiment 1.

[0092] Step S2, wind carbon fiber prepreg around the circumference of each core mold 21 and around the circumference of the core mold group 2. The number of winding layers of the carbon fiber prepreg is not limited here.

[0093] Step S3, install the core mold group 2 wound with prepreg between the first mold body 11 and the second mold body 12, and fix the first mold body 11 and the second mold body 12.

[0094] Step S4, after the carbon fiber prepreg is cured, remove the preparation mold.

[0095] Through the above operations, the preparation of the multi-chamber beam can be completed. Moreover, since the variable cross-section mold 211 in the preparation mold is of a split structure, it can be conveniently removed to facilitate demolding.

[0096] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A preparation mold for a multi-cavity beam, characterized in that, The material of the multi-chamber beam is carbon fiber composite material. The extending direction of the multi-chamber beam is the first direction, and the first direction includes a first branch direction and a second branch direction which are oppositely arranged. The preparation mold includes: An outer mold (1), including a first mold body (11) and a second mold body (12) which are butted against each other. The first mold body (11) and the second mold body (12) enclose a molding space; A core module group (2) disposed in the molding space, including a plurality of core molds (21). At least one of the core molds (21) is a variable cross-section mold (211). The variable cross-section mold (211) includes a first split mold (211a) and a second split mold (211b). The first split mold (211a) includes a first variable cross-section section that tapers in the first branch direction. The second split mold (211b) includes a second variable cross-section section that tapers in the second branch direction. The first split mold (211a) is butted against the second split mold (211b) along the first branch direction. The cross-sectional area of the middle region of the variable cross-section mold (211) is smaller than that of the two end regions; The first split mold (211a) is provided with a plurality of insertion parts that are staggeredly arranged in the first branch direction. The second split mold (211b) is provided with a plurality of matching parts that are staggeredly arranged in the second branch direction. The number of the insertion parts and the number of the matching parts are the same, and each of the insertion parts is inserted into each of the matching parts correspondingly.

2. The preparation mold for the multi-chamber beam according to claim 1, characterized in that, It further includes a first detachable connecting piece. The first split mold (211a) and the second split mold (211b) are also connected by the first detachable connecting piece.

3. The preparation mold for the multi-chamber beam according to claim 1, characterized in that, The butting direction of the first mold body (11) and the second mold body (12) is the second direction. The second direction and the first direction are arranged at an angle. The multi-chamber beam further includes a third direction. The third direction and the first direction, the second direction are both arranged at an angle; Among all the core molds (21), at least three of the core molds (21) are arranged in the third direction. A flexible layer is arranged on the peripheral wall surface of the core mold (21) that is not adjacent to the outer mold (1) in the third direction.

4. The manufacturing die of the multi-cavity beam according to claim 1, characterized in that, At least part of the core molds (21) are provided with heating components (213).

5. The preparation mold of the multi-chamber beam according to claim 4, characterized in that, The heating component (213) is a heating pipe, and a heating fluid is passed through the heating pipe.

6. The manufacturing mold of the multi-chamber beam according to claim 4, characterized in that, At least part of the core molds (21) are provided with temperature sensors (214).

7. The manufacturing die of the multi-cavity beam according to claim 1, characterized in that, Blocking grooves (215) are arranged at both ends of each of the core molds (21) in the first direction.

8. The manufacturing die of the multi-cavity beam according to claim 1, characterized in that, Limiting blocks (216) are arranged on the circumferences of all the core molds (21).

9. The preparation mold for the multi-cavity beam according to any one of claims 1-8, characterized in that, The first mold body (11) includes a first bottom wall part (111) and two first side wall parts (112) that are oppositely arranged. Both of the first side wall parts (112) are installed on the first bottom wall part (111); The second mold body (12) includes a second bottom wall part (121) and two second side wall parts (122) that are oppositely arranged. Both of the second side wall parts (122) are lapped on the second bottom wall part (121); During the docking and assembly process of the first mold body (11) and the second mold body (12), the first side wall portion (112) can act on the second side wall portion (122) to drive the second side wall portion (122) to displace towards the core module (2).

10. The preparation mold for the multi-cavity beam according to claim 9, characterized in that, The docking direction of the first mold body (11) and the second mold body (12) is the second direction, and at least one of the first side wall portion (112) and the second side wall portion (122) has an inclined surface disposed at an angle to the second direction.

11. The preparation mold of the multi-cavity beam according to claim 9, characterized in that, A plurality of bumps are provided on the surface of the first side wall portion (112) facing the second side wall portion (122); and / or, a plurality of bumps are provided on the surface of the second side wall portion (122) facing the first side wall portion (112).

12. The preparation mold of the multi-cavity beam according to claim 9, characterized in that, The first bottom wall portion (111) and / or the second bottom wall portion (121) is provided with a second hollow structure (111a).

13. The preparation mold for the multi-chamber beam according to any one of claims 1-8, characterized in that, It further includes a mold clamping device (3) for connecting the first mold body (11) and the second mold body (12).

14. A preparation method of a multi-cavity beam, characterized in that, It includes the following steps: Step S1, configure the preparation mold for the multi-cavity beam as described in any one of claims 1-13; Step S2, wind carbon fiber prepreg around the circumference of each core mold (21) and wind carbon fiber prepreg around the circumference of the core module (2); Step S3, install the core module (2) wound with prepreg between the first mold body (11) and the second mold body (12), and fix the first mold body (11) and the second mold body (12); Step S4, after the carbon fiber prepreg is cured, remove the preparation mold.

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