CN117429090B

CN117429090B - Airborne multi-cavity structure and integrated forming die and method thereof

Info

Publication number: CN117429090B
Application number: CN202311651378.3A
Authority: CN
Inventors: 吴仟; 张建坤; 夏吉升; 孙德权; 杜芳芳; 王超
Original assignee: Jiangxi Jiuyou Aviation Equipment Co ltd; Harbin Yuanchi Aviation Equipment Co ltd
Current assignee: Jiangxi Jiuyou Aviation Equipment Co ltd; Harbin Yuanchi Aviation Equipment Co ltd
Priority date: 2023-12-04
Filing date: 2023-12-04
Publication date: 2024-04-30
Anticipated expiration: 2043-12-04
Also published as: CN117429090A

Abstract

The application discloses an airborne multi-cavity structure and an integrated forming die and method thereof, wherein the multi-cavity structure comprises a main body, the inside of the main body is divided into a plurality of mutually independent cavities, an isolation cavity is arranged between two adjacent cavities, a first die comprises a plurality of block dies, the shape of each block die corresponds to the shape of one cavity, and each block die is used for independently paving a plurality of layers of prepreg to form a main body prepreg part corresponding to the cavity; the second mold comprises a plurality of forming molds, wherein the forming molds are used for preforming an isolation prepreg part, and the isolation prepreg part is used for forming an isolation cavity; the isolation prepreg part comprises a main body sub-part corresponding to the main body and an isolation sub-part corresponding to the isolation cavity; the first die further comprises splicing dies arranged between two adjacent dies, the shape of each splicing die corresponds to the shape of one isolation cavity, and the splicing dies are used for being fixed between the two adjacent dies after the isolation prepreg part and the main body prepreg part are overlapped, so that the multi-cavity structure is integrally formed through the first die.

Description

Airborne multi-cavity structure and integrated forming die and method thereof

Technical Field

The application relates to the technical field of aviation materials, in particular to a multi-cavity structure on a loader, an integrated forming die and a method thereof.

Background

Wings are the main components providing lift to aircraft and in addition to the aerodynamic profile they have an increasing demand for their own weight reduction. In order to reduce the weight of the wing as much as possible under the condition of ensuring that the wing has enough strength, the preparation of the multi-cavity structural member by adopting the composite material is an ideal technical line; although the adoption of the multi-cavity structure can ensure that the wing has enough strength under the condition of reducing the weight, the preparation of the multi-cavity structure has higher technical difficulty, and how to demould the multi-cavity structural member is a technical problem to be solved by the technicians in the field.

Disclosure of Invention

In view of the foregoing drawbacks or shortcomings in the prior art, it is desirable to provide an airborne multi-cavity structure, and an integral molding die and method thereof, that can achieve integral molding of the multi-cavity structure.

In a first aspect, the present application provides a combination mold for integrally forming an airborne multi-cavity structure, where the multi-cavity structure includes a main body, the interior of the main body is divided into a plurality of independent cavities, and an isolation cavity is disposed between two adjacent cavities, and the mold includes:

a first mold including a plurality of block molds each having a shape corresponding to a shape of one of the chambers, each of the block molds being for independently laying a plurality of layers of prepreg to form a main body prepreg corresponding to the chamber;

A second mold including a plurality of molding dies for preforming an isolation prepreg for forming the isolation cavity; the isolation prepreg comprises a main body sub-part corresponding to the main body and an isolation sub-part corresponding to the isolation cavity, wherein the main body sub-part is used for being overlapped with the main body prepreg to form the main body;

The first die further comprises splicing dies arranged between two adjacent block dies, the shape of each splicing die corresponds to the shape of one isolation cavity, and the splicing dies are used for being fixed between the two adjacent block dies after the isolation prepreg and the main body prepreg are overlapped, so that the multi-cavity structure is integrally formed through the first die.

Optionally, including with the overlap joint mould that the piece mould can dismantle the connection, be provided with the die face on the piece mould, overlap joint mould with the concatenation mould is all detachably set up on the die face, overlap joint mould is used for with follow-up the shape of laying the first prepreg on the piece mould extend to overlap joint mould on, overlap joint mould is used for forming first overlap joint portion on main part prepreg portion.

Optionally, the block mold comprises a first molding area, the overlap mold comprises a second molding area connected with the first molding area, and a plurality of overlap tables are arranged on the second molding area in a laminated mode, and the overlap tables are used for limiting the length of the first prepreg extending onto the overlap mold; the widths of the plurality of lapping tables gradually decrease along the stacking direction of the die surfaces far away from the lapping die; the second forming area is used for forming a first lap joint part with gradually increased length along the laying level direction.

Optionally, the second mold comprises a second base, and a first half mold and a second half mold which are arranged on the second base, wherein a first laying area and a second laying area are arranged on the first half mold, the directions of the first laying area and the second laying area are intersected, and the shape of the first laying area is matched with the shape of the isolation cavity; the shape of the second laying area is matched with the shape of the main body;

a third paving region and a fourth paving region are arranged on the second half mould, the directions of the third paving region and the fourth paving region are intersected, and the shape of the third paving region is matched with the shape of the isolation cavity; the shape of the fourth paving area is matched with the shape of the main body;

The first paving area and the third paving area are arranged opposite to each other and used for forming the isolator part between the first paving area and the third paving area; the second and fourth lay-out areas are arranged along the same extension direction to form the main body sub-portion on the first and second lay-out areas.

Optionally, two ends of the main body sub-part are respectively provided with a second lap joint part which is matched with two adjacent main body pre-impregnated parts independently, wherein,

A plurality of first limiting tables are arranged on the second laying area in a stacking manner, and the distances from the first limiting tables to the first laying area gradually decrease along the stacking direction of the die surfaces far away from the second laying area; the second laying area is used for forming a second lap joint part with gradually increased length along the laying layer level direction;

A plurality of second limiting tables are arranged on the fourth laying area in a stacking manner, and the distances from the second limiting tables to the first laying area gradually decrease along the stacking direction of the die surface far away from the fourth laying area; the fourth laying area is used for forming a second lap joint part with gradually increased length along the laying level direction.

Optionally, the thickness of each lapping table is an integer multiple of the thickness of the first prepreg, the thickness of each first limiting table is an integer multiple of the thickness of the second prepreg, and the thickness of each second limiting table is an integer multiple of the thickness of the second prepreg.

Optionally, the main body comprises a first chamber and a second chamber which are independent from each other, and a first isolation cavity arranged between the first chamber and the second chamber, wherein the first chamber and the second chamber are distributed along the radial direction of the main body, a first sub-cavity and a second sub-cavity which are independent from each other, and a second isolation cavity arranged between the first sub-cavity and the second sub-cavity are arranged in the first chamber, and the first isolation cavity is perpendicular to the second isolation cavity; wherein,

The block mold comprises a first block mold and a second block mold, the shape of the first block mold corresponds to the shape of the first cavity, the shape of the second block mold corresponds to the shape of the second cavity, the first block mold comprises a first sub mold and a second sub mold, the first sub mold corresponds to the shape of the first sub cavity, and the second sub mold corresponds to the shape of the second sub cavity;

The molding die includes a first molding die having a shape corresponding to the formation of the first insulating cavity and used for preforming the first insulating prepreg portion, and a second molding die having a shape corresponding to the shape of the second insulating cavity and used for preforming the second insulating prepreg portion.

Optionally, the first isolation pre-soaking part comprises a first main body sub-part and a first isolation sub-part, the second isolation pre-soaking part comprises a second main body sub-part and a second isolation sub-part, the first isolation sub-part is provided with a first limit part overlapped with the second main body sub-part, the second main body sub-part is provided with a second limit part matched with the first limit part, wherein,

A plurality of third limiting tables are arranged on the third laying area in the first forming die in a stacking manner, the widths of the third limiting tables gradually decrease along the stacking direction of the die surface far away from the third laying area, so that the first limiting parts with gradually increasing depths are formed on the first isolation sub parts, and the first limiting parts are in groove shapes;

And a plurality of fourth limiting tables are arranged on the second laying area and the fourth laying area in a laminating manner in the second forming die, the widths of the fourth limiting tables gradually decrease along the laminating direction of the die surface far away from the second laying area so as to form a second limiting part with gradually increasing height on the second main body sub-part, and the second limiting part is in a convex shape.

In a second aspect, the present application provides an airborne multi-cavity structure, integrally formed by a combination mold of an airborne multi-cavity structure as described above.

In a third aspect, the present application provides a method for integrally forming an airborne multi-cavity structure, using a combination mold for integrally forming an airborne multi-cavity structure as described in any one of the above, the method comprising:

Preforming an isolation prepreg through a forming die, wherein the isolation prepreg is used for forming the isolation cavity; the isolation prepreg part comprises a main body sub-part corresponding to the main body and an isolation sub-part corresponding to the isolation cavity, and the isolation prepreg part is demolded from the forming die;

splicing a block mold and a lap mold, independently paving a plurality of layers of prepregs on the block mold and the lap mold to form a main body prepreg part corresponding to the cavity, and removing the lap mold from the block mold;

The isolation prepreg is arranged between the main body prepreg on two adjacent block molds, and the main body prepreg is used for being overlapped with the main body prepreg through the main body sub-parts;

Installing splicing molds between two adjacent block molds, wherein the positions of the splicing molds correspond to the positions of the main body sub-parts and are pre-pressed;

and forming the multi-cavity structure through a vacuum hot-press forming process.

The technical scheme provided by the embodiment of the application can comprise the following beneficial effects:

According to the airborne multi-cavity structure, the main body prepreg part for main body molding and the isolation prepreg part for cavity isolation molding are arranged, contact fixation is performed in a lap joint mode, multi-cavity integrated molding is achieved in a combined mode, the connection strength of the isolation cavity and the main body is improved, and the physical performance of the multi-cavity structure is improved.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:

FIG. 1 is a schematic view of a multi-cavity structure according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a first blank according to an embodiment of the present application;

FIG. 3 is a schematic diagram of a second blank according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a first mold according to an embodiment of the present application;

FIG. 5 is a schematic view illustrating formation of a first lap portion according to an embodiment of the present application;

FIG. 6 is a schematic structural view of a first lap joint according to an embodiment of the present application;

FIG. 7 is a schematic diagram illustrating the cooperation of a first lap joint and a second lap joint according to an embodiment of the present application;

FIG. 8 is a schematic view illustrating formation of a second lap portion according to an embodiment of the present application;

FIG. 9 is a schematic structural view of a second lap joint according to an embodiment of the present application;

FIG. 10 is a schematic view of a vacuum membrane according to an embodiment of the present application;

FIG. 11 is a schematic cross-sectional view of a vacuum flexible membrane according to an embodiment of the present application;

FIG. 12 is a schematic view of a portion of a multi-cavity structure according to an embodiment of the present application;

Fig. 13 is a schematic view illustrating formation of a first limiting portion according to an embodiment of the present application;

Fig. 14 is a schematic structural view of a second limiting portion according to an embodiment of the present application;

fig. 15 is a schematic diagram illustrating the cooperation of a first lap joint portion and a second lap joint portion according to an embodiment of the present application.

Detailed Description

The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the application are shown in the drawings.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1, the present application provides a composite material multi-cavity structure 100, where the multi-cavity structure 100 includes a main body 101, the interior of the main body 101 is divided into a plurality of independent cavities, and an isolation cavity is disposed between two adjacent cavities. The number of the chambers inside the main body 101 is not limited in the embodiment of the present application, and the number of the chambers may be two, three or more, which is not limited in the present application.

In the embodiment of the present application, two chambers disposed adjacently are illustrated and include a first chamber 110 and a second chamber 120, the shape of the main body 101 is cylindrical, and the first chamber 110 and the second chamber 120 are distributed in the radial direction of the main body 101, and the size of the first chamber 110 and the second chamber 120 is not limited in the embodiment of the present application. The first chamber 110 and the second chamber 120 are isolated by a first isolation chamber 111. The first chamber 110 is formed by a part of the main body 101 and the first isolation chamber 111 in this embodiment, and the second chamber 120 is formed by the rest of the main body 101 and the first isolation chamber 111.

In another embodiment of the present application, the first chamber 110 includes a first subchamber 103 and a second subchamber 104 that are independent of each other, and the first subchamber 103 and the second subchamber 104 are distributed along the axial direction of the main body 101, and the size of the first subchamber 103 and the second subchamber 104 is not limited in the embodiment of the present application. The first subchamber 103 and the second subchamber 104 are isolated by a second isolation chamber 112. The first subchamber 103 is formed by a portion of the main body 101, a portion of the first isolation chamber 111, and the second isolation chamber 112, and the first subchamber 103 is formed by a portion of the main body 101, a remaining portion of the first isolation chamber 111, and the second isolation chamber 112.

The embodiments of the present application are not limited to the division manner of the chamber and the subchambers in the chamber, and may be set according to needs in different embodiments. It can be understood that in the embodiment of the present application, the chambers are independently disposed, and in the embodiment of the present application, "independent" refers to that a space is limited by the isolation cavity and a space region that can be separately identified is formed in space. The chambers may not be communicated with each other, and in the case of communication, an opening for between two adjacent chambers is provided in the partition, and in the case of non-communication, the partition is in contact with other surrounding bodies 101 or the partition.

As shown in fig. 2-3, the multi-cavity structure 100 is integrally formed by a prepreg headquarter including a main body 101 prepreg portion for molding a portion of the main body 101 corresponding to the cavity and an insulation prepreg portion 220 for molding the insulation cavity.

The prepreg portion of the main body 101 and the separation prepreg portion 220 are overlapped. The prepreg of the main body 101 is provided with a first lap joint part, the isolation prepreg 220 is provided with a second lap joint part, and the first lap joint part and the second lap joint part are clamped to realize fixation between the prepreg of the main body 101 and the isolation prepreg 220 to form a prepreg headquarter.

In the embodiment of the present application, the prepreg portion of the main body 101 and the separation prepreg portion 220 are formed by laying, pre-pressing, and the like. In the embodiment of the present application, the prepreg includes a substrate and a polymer material impregnated on the substrate, where the substrate may be a glass fiber cloth or a carbon fiber cloth, and the polymer material may be various plastic resins, and the embodiment of the present application is not limited thereto specifically. The first prepreg, the second prepreg, the third prepreg 530, and the like according to the embodiment of the present application may be the same prepreg or different prepregs, which is not limited to this.

In this embodiment, the outer surface of the second lap body 221 and the outer surface of the blank body 101 are matched to form the outer surface of the cavity. In other words, in this embodiment, the cavity is formed by the prepreg portion of the main body 101 and a part of the separation prepreg portion 220, and the engaged or overlapped position of the second overlap member 221 and the first overlap member 211 is disposed on the area of the cavity, so as to improve the bonding effect of the material rib body and the material rib main body 101, and improve the mechanical strength of the formed reinforcing rib.

The number of the separation prepregs 220 corresponds to the number of the reinforcing ribs, and accordingly, the number of the prepreg main bodies 101 may be plural. Specifically, the prepreg portion of the main body 101 includes a plurality of blank main bodies 101, the blank main bodies 101 are respectively located at two sides of the second overlap body 221, and the first overlap body 211 is located at one end of the blank main body 101 near the first overlap body 211.

Wherein the first overlap 211 has a gradually increasing extension in the direction from the outer surface to the inner surface, and the second overlap 221 has a gradually decreasing extension in the direction from the outer surface to the inner surface, and the extension is matched with the extension at a corresponding position.

The extension length of the first overlap body 211 is defined as the length between one end of the first overlap body 211 close to the blank body 101 and the other end far from the blank body 101, wherein the end of the first overlap body 211 close to the blank body 101 can be regarded as flush, i.e. the measurement starting points of the extension lengths are consistent. The extension length of the second contact is defined as the length between the center of the second overlap 221 and the end of the second overlap 221 near the first overlap 211.

It will be appreciated that in the embodiment of the present application, the first overlap 211 and the second overlap 221 are engaged with each other, that is, in the direction from the outer surface to the inner surface, the edge of the first overlap 211 contacts with the edge of the second overlap 221, that is, the gradual increase trend of the extension length is consistent with the gradual decrease trend of the extension length.

In the embodiment of the application, the contact positions of the first lap joint body 211 and the second lap joint body 221 are gradually changed, so that the combination effect during molding is improved; the forming effect of the first material blank and the second material blank on the contact surface is improved, the uniformity and consistency of the thickness of the contact position are improved, layering, wrinkling and the like are prevented, and the forming effect is improved.

In the application, the structure for forming the isolation cavity is arranged to comprise a main body sub-part 222 and an isolation sub-part 212, namely, the outer side surface corresponding to the second lap joint body 221 is matched with the outer side surface of the blank main body 101 to form the outer surface of the cavity, so that the positioning precision of the isolation cavity can be ensured.

In this embodiment, the isolating prepreg 220 has a central plane, the isolating prepreg 220 includes isolating sections located at two sides of the central plane, the isolating sections are symmetrically disposed about the central plane, and each of the isolating sections includes a first isolating section 231 for forming the material tendon and a second isolating section 232 for forming the second contact portion; the two isolation parts are fixedly connected through pre-pressing, and the isolation prepreg 220 further comprises a material blank extension split 233 which is stacked on one side of the two second isolation parts 232 far from the inner side surface.

In the embodiment of the application, the first isolation subsection 231 and the second isolation subsection 232 at two sides of the central plane are respectively laid with prepreg, and then a material embryo extension split 233 which jointly connects the two parts is formed, and the material embryo extension split 233 is used for being formed at one side of the outer surface of the cavity, so that the preparation quality and the connection strength of the multi-cavity structure 100 are improved.

It can be appreciated that in the embodiment of the present application, two ends of the blank extension split 233 respectively form a second lap joint body 221 with the first isolation part 231 and another second lap joint body 221 with the second isolation part 232, so as to be used for matching with the first lap joint bodies 211 respectively located on the prepreg parts of the main body 101 at two sides of the isolation prepreg 220.

The outer side surface of the second overlap 221 and the outer side surface of the blank body 101 are matched to form the outer surface of the cavity. An inner side surface of the second overlap 221 and an inner side surface of the first overlap 211 are matched to form an inner surface of the cavity.

In the embodiment of the present application, the overall distribution trend of the extension length of the first lap joint body 211 along the direction from the outer side surface to the inner side surface is stepwise increased, and the overall distribution trend of the extension length of the second lap joint body 221 along the direction from the outer side surface to the inner side surface is stepwise decreased.

In an embodiment of the present application, the second contact portion includes a plurality of layers of a second prepreg ply 202 along the direction from the outside surface to the inside surface; the second prepreg ply 202 includes an integral layer of a second prepreg.

The first overlap 211 located at both sides of the second overlap 221 is symmetrically disposed with respect to the center plane, the first contact portion includes a plurality of first prepreg laminates 201, the first prepreg laminates include an integer number of first prepregs, and the first prepreg laminates 201 are in contact with the end portions of the second prepreg laminates having the same thickness as the corresponding number of layers in the direction from the outer surface to the inner surface.

In the embodiment of the application, one layer of the first prepreg lamination 201 is an integer layer of the first prepreg with consistent extension length, and one layer of the second prepreg lamination 202 is an integer layer of the second prepreg with consistent extension length, so that the forming is convenient to lay along with the forming, and the forming quality is improved. In the application, the joint part of the first overlap body 211 and the second overlap body 221 of the clamping area with gradually changed length improves the connection strength of the clamping area, prevents layering, wrinkling and the like and improves the molding effect.

As shown in fig. 4, the present application further provides a mold for integrally forming the composite material multi-cavity structure 100, where the mold includes a first mold 300, a second mold 400, and a third mold.

First die 300

The first mold 300 includes a plurality of block molds 320 and a bridging mold 330 detachably connected to the block molds 320, wherein the bridging mold 330 is detachably connected to the block molds 320.

Each of the block molds 320 has a shape corresponding to that of one of the chambers, and each of the block molds 320 is adapted to independently lay down a plurality of layers of prepreg to form a prepreg portion of the body 101 corresponding to the chamber. Each of the block molds 320 may be provided with a first base 310, so as to facilitate independent laying of multiple layers of prepregs.

The block mold 320 is provided with a mold matching surface, the overlap mold 330 and the splicing mold 350 are detachably arranged on the mold matching surface, the overlap mold 330 is used for extending a first prepreg laid on the block mold 320 along with the shape onto the overlap mold 330, and the overlap mold 330 is used for forming a first overlap portion on the prepreg portion of the main body 101.

In the embodiment of the present application, the number of the block modules 320 corresponds to the number of the chambers, and the splice modules 350 correspond to the number of the spacers.

As shown in fig. 5-6, the block mold 320 includes a first molding zone 301, the overlap mold 330 includes a second molding zone 302 connected to the first molding zone 301, and a plurality of overlap tables 340 are stacked on the second molding zone 302, and the overlap tables 340 are used to limit the length of the first prepreg extending onto the overlap mold 330; the width of the plurality of lapping stations 340 gradually decreases in the stacking direction away from the die face of the lapping die 330; the second forming area 302 is used for forming a first lap portion with a length gradually increasing along the laying level direction.

The second molding region 302 includes a molding extension region 303, the molding extension region 303 is connected to the adjacent first molding region 301, the molding extension region 303 is matched with the shape of the outer surface of the multi-cavity structure 100, the plurality of overlapping platforms 340 are disposed on one side of the molding extension region 303 away from the first molding region 301, and the lengths of the plurality of overlapping platforms 340 in the direction away from the molding extension region 303 are gradually decreased.

Each of the bonding stages 340 has a thickness that is an integer multiple of a thickness of a first prepreg that extends from the first molding zone 301 to an end of the corresponding bonding stage 340 and is flush with a surface of the corresponding bonding stage 340 after the multi-layer conformal laying, and a next stacked first prepreg that extends from the first molding zone 301 and covers to a surface of the corresponding bonding stage 340.

In the embodiment of the present application, the number of the lapping platforms 340 is matched with the number of layers of the first prepreg layup 201 to be formed, and the lengths of the plurality of lapping platforms 340 gradually decrease along the stacking direction away from the die surface of the first forming area 301; in the embodiment of the present application, the length of the lapping table 340 is along the extending length direction of the first lapping body 211. In this embodiment, the end of the lapping table 340 near the side of the first molding zone 301 is used to define the extension length of the first prepreg on the first molding zone 301 and the second molding zone 302, and the first prepreg with the corresponding number of layers extends to the end of the lapping table 340 with the corresponding thickness, so as to implement the limitation of the extension length of the first prepreg stack 201.

It should be noted that, in the embodiment of the present application, the lapping mold 330 is only used to mold the first lap body 211 with a predetermined length on the second molding area 302, and after the first prepreg is laid layer by layer and pre-pressed on the second molding area 302, the lapping mold 330 is removed from the first base 310, so that the installation of the isolation prepreg portion 220 and the integral molding of the prepreg headquarter are not affected.

The first mold 300 further includes a splice mold 350 disposed between two adjacent block molds 320, each of the splice molds 350 has a shape corresponding to the shape of one of the isolated cavities, and the splice mold 350 is configured to be fixed between two adjacent block molds 320 after the isolated prepreg 220 overlaps the prepreg of the main body 101, so as to integrally form the multi-cavity structure 100 through the first mold 300.

Second die 400

As shown in fig. 7 to 8, the second mold 400 includes a plurality of molding dies for preforming the isolation prepregs 220, and the isolation prepregs 220 are used to form the isolation cavities; the isolation prepreg 220 includes a main body sub-portion 222 corresponding to the main body 101 and an isolation sub-portion 212 corresponding to the isolation cavity, and the main body sub-portion 222 is used for overlapping the main body 101 prepreg to form the main body 101.

The second mold 400 comprises a second base 410, and a first mold half 420 and a second mold half 430 which are arranged on the second base 410, wherein a first paving area 401 and a second paving area 402 are arranged on the first mold half 420, the directions of the first paving area 401 and the second paving area 402 are intersected, and the shape of the first paving area 401 is matched with the shape of the isolation cavity; the shape of the second application area 402 is adapted to the shape of the body 101.

A third paving region 403 and a fourth paving region 404 are arranged on the second half mold 430, the directions of the third paving region 403 and the fourth paving region 404 are intersected, and the shape of the third paving region 403 is matched with the shape of the isolation cavity; the shape of the fourth application area 404 is adapted to the shape of the body 101.

The first paving region 401 is disposed opposite to the third paving region 403 for forming the separator 212 between the first paving region 401 and the third paving region 403; the second paving region 402 and the fourth paving region 404 are disposed along the same extension direction to form the main body sub-portion 222 on the first paving region 401 and the second paving region 402.

Two ends of the main body sub-portion 222 are respectively provided with a second lap joint portion which is separately matched with the adjacent two pre-impregnated portions of the main body 101, wherein,

A plurality of first limiting tables 440 are stacked on the second laying area 402, and the distances from the first limiting tables 440 to the first laying area 401 gradually decrease along the stacking direction away from the die surface of the second laying area 402; the second laying area 402 is used for forming a second lap joint part with a length gradually increasing along the laying level direction;

A plurality of second limiting tables 450 are stacked on the fourth laying area 404, and the distances from the second limiting tables 450 to the first laying area 401 gradually decrease along the stacking direction away from the die surface of the fourth laying area 404; the fourth laying area 404 is used to form a second overlap portion that gradually increases in length along the direction of the laying level.

In the application, the first laying area 401 is used for laying multiple layers of second prepregs along with the shape to form the material blank rib, the second laying area 402 is used for extending the second prepregs from the first laying area 401 to the second laying area 402 to form a second lap joint body 221, a plurality of first limiting tables 440 are arranged on the second laying area 402 in a stacked mode, and the first limiting tables 440 are used for limiting the extending length of the second prepregs.

The first limiting tables 440 are disposed at one end of the second paving region 402 away from the first paving region 401, and the lengths of the first limiting tables 440 in the direction away from the second paving region 402 gradually decrease; the thickness of each first limiting table 440 is an integer multiple of the thickness of the second prepreg, the second prepreg extends from the second molding region 302 to the end corresponding to the first limiting table 440, and is flush with the surface of the corresponding first limiting table 440 after the multi-layer conformal laying, and the next laminated second prepreg extends from the first laying region 401 to and covers the surface of the first limiting table 440.

In an embodiment of the present application, the first mold half 420 is used to form the first isolated sub 231 alone and the second mold half 430 is used to form the second isolated sub 232 alone. The first half mold 420 and the second half mold 430 may be clamped, and the first isolation subsection 231 and the second isolation subsection 232 may be pre-pressed and fixed to form the isolation prepreg 220.

In the embodiment of the present application, the number of the first limiting tables 440 is matched with the number of layers of the second prepreg ply 202 to be formed, and the lengths of the plurality of first limiting tables 440 gradually decrease in the stacking direction along the die surface away from the second laying area 402. In the embodiment of the present application, the length of the first limiting platform 440 is along the extending length direction of the second overlap body 221. In this embodiment, the end of the first limiting table 440 near the side of the second laying area 402 is used to limit the extension length of the second prepreg laid on the second laying area 402 by the first laying area 401, and the second prepreg with the corresponding layer number extends to the end of the first limiting table 440 with the corresponding thickness, so as to limit the extension length of the second prepreg stack 202.

In one embodiment of the present application, the isolation prepreg section 220 includes a blank extension that may be restrained at one or more bosses adjacent to the second layup area 402 to form the second overlap 221.

In the embodiment of the present application, the thickness of each of the lapping platforms 340 is an integer multiple of the thickness of the first prepreg, the thickness of each of the first limiting platforms 440 is an integer multiple of the thickness of the second prepreg, and the thickness of each of the second limiting platforms 450 is an integer multiple of the thickness of the second prepreg.

Third die

The third mold has a shape matching the shape of the cavity, is used for laying the air guide net 510, at least two unvulcanized rubber layers 520 and a third prepreg 530 arranged between two adjacent unvulcanized rubber layers 520 along with the shape, and is provided with a plurality of ultrasonic vibration pieces 540 on the unvulcanized rubber layers 520 to vulcanize and form the vacuum soft film 500 having the same shape as the cavity.

The vacuum flexible film 500 is matched with the internal shape of the chamber, and the vacuum flexible film 500 supports the first body 101 prepreg part and the second body 101 prepreg part in the first chamber 110 or the second chamber 120. In the embodiment of the present application, the first isolation cavity 111 between two adjacent first chambers 110 and the second chamber 120 is clamped by the first inner support and the second inner support at the same time. In the embodiment of the present application, the rigidity of the vacuum bladder 500 is critical to the molding of the chamber.

The number of the inner supporting pieces is not limited in the embodiment of the application, and the inner supporting pieces are in one-to-one correspondence with the number of the chambers, the number of the sub-chambers and the like.

In this embodiment of the present application, the third mold includes a male mold and a female mold, the male mold and the female mold form a cavity after being closed, and the vacuum soft film 500 is formed in the cavity. In the embodiment of the application, the air guide net 510 and the ultrasonic vibration piece 540 can be conveniently paved by adopting a male die and a female die. In the embodiment of the application, the ultrasonic vibration piece 540 is connected to the vibration generator through the connecting wire, so that the vacuum soft membrane 500 can be conveniently vibrated, the vibration vacuumizing is realized, and the vacuumizing capability is improved.

The air guide net 510 in the embodiment of the present application may be a heat-resistant net such as asbestos, glass wool, rock wool, slag wool, etc. The ultrasonic vibration plate 540 may be a ceramic vibrator.

In the embodiment of the present application, the air guide net 510 is disposed on a surface of the vacuum flexible film 500 contacting the prepreg headquarter. The vibration generator is disposed in the inner layer of the vacuum bladder 500, and the number of the unvulcanized rubber layers 520 and the third prepregs 530 in the vacuum bladder 500 is in this embodiment in such a manner that one third prepreg 530 is disposed between every two unvulcanized rubber layers 520, by which the rigidity and the air impermeability of the vacuum bladder 500 can be improved.

In the embodiment of the application, the plurality of ultrasonic vibration pieces are used for vibration vulcanization in the vulcanization molding process and for vibration vacuumizing before integrated molding.

In the embodiment of the present application, the vacuum soft film 500 is used for covering each surface on the prepreg headquarters on the first mold 300 in the integral molding process of the multi-cavity structure 100, and the vacuum pumping operation in the vacuum hot press molding process can be performed through the vacuum soft film 500. Therefore, the molding quality (including the shape accuracy and the air impermeability) of the vacuum film 500 directly affects the vacuuming effect. In the present application, the vacuum flexible film 500 is identical to the multi-cavity structure 100 in shape, and thus, a high shape accuracy is required when it corresponds to the rib or other curved surface shape. In the embodiment of the application, the unvulcanized rubber and the third prepreg 530 are adopted for molding, and the ultrasonic vibration piece 540 is clamped between rubber materials, so that the ultrasonic vibration piece 540 can vibrate in the vulcanization molding process of the vacuum soft film 500 on one hand, the flowing effect of the rubber materials is improved, and the appearance requirement is met; the vacuum soft film 500 formed by the composite material can be reduced by ultrasonic vibration, so that the problems of high porosity, glue enrichment and the like are solved, and the appearance accuracy and the air impermeability are improved.

The ultrasonic vibration piece 540 can also be applied to a vacuumizing process before a vacuum hot-pressing integrated forming process, and the vacuumizing effect is improved in a vibration mode.

The number of layers of the unvulcanized rubber layer 520 and the third prepreg 530 is not limited in the embodiment of the present application, and may be set according to needs in different embodiments, and in the embodiment of the present application, the rigidity of the vacuum soft film 500 may be improved, and the vacuumizing effect and the supporting effect on the prepreg headquarters may be improved by the third prepreg 530.

The application provides an integral molding method of an onboard multi-cavity structure 100, which aims at forming a plurality of cavities and comprises the following steps:

ST100, preforming an isolation prepreg 220 by a forming die, wherein the isolation prepreg 220 is used for forming the isolation cavity. The isolation prepreg 220 includes a main body sub-portion 222 corresponding to the main body 101 and an isolation sub-portion 212 corresponding to the isolation cavity, and the isolation prepreg 220 is released from the molding die.

ST200 is performed by splicing the block mold 320 with the overlap mold 330, laying up a plurality of layers of prepregs on the block mold 320 and the overlap mold 330 independently to form a prepreg of the main body 101 corresponding to the cavity, and removing the overlap mold 330 from the block mold 320.

ST300, the separation prepreg 220 is installed between the prepregs of the main body 101 on the adjacent two block molds 320, and the sub-main body 222 is used for overlapping the prepregs of the main body 101.

ST400, installing a splicing mold 350 between two adjacent block molds 320, wherein the position of the splicing mold 350 corresponds to the position of the main body sub-part 222 and is preloaded.

ST500, molding the multi-cavity structure 100 by a vacuum hot press molding process.

Example 1

Referring to fig. 5-8 in detail, the present application provides a method for integrally forming a multi-cavity structure 100 made of composite material, wherein the multi-cavity structure 100 includes a main body 101, the interior of the main body 101 is divided into a first cavity 110 and a second cavity 120 which are independent from each other, and a first isolation cavity 111 is disposed between the first cavity 110 and the second cavity 120, and the method includes:

S100, preforming a first isolation prepreg 220, wherein the first isolation prepreg 220 is used for forming the first isolation cavity 111; the first isolation prepreg 220 includes a main body sub-portion 222 corresponding to the main body 101 and an isolation sub-portion 212 corresponding to the first isolation cavity 111.

A first forming mold 411 is provided, the first forming mold 411 includes a second base 410, a first half mold 420 and a second half mold 430 disposed on the second base 410, a first paving region 401 and a second paving region 402 are disposed on the first half mold 420, and a third paving region 403 and a fourth paving region 404 are disposed on the second half mold 430.

Specifically, the first isolation prepreg 220 is preformed, the method comprising:

S110, laying a preset number of layers of second prepregs layer by layer on the first half mold 420, and extending each layer of the second prepregs from the first laying area 401 to the second laying area 402 to form a first isolation section 231 on the first half mold 420.

S120, laying a preset number of layers of second prepreg layer by layer on the second half mold 430, and extending each layer of second prepreg layer from the third laying area 403 to the fourth laying area 404 to form a second isolation portion 232 on the second half mold 430.

S130, fixing the second mold half 430 and the first mold half 420 on the second base 410 such that the first isolation part 231 is in contact with the second isolation part 232.

S140, providing a filling block 234, where the filling block 234 is disposed in a triangular area enclosed between the first isolation subsection 231 and the second isolation subsection 232, and an upper surface of the filling block 234 is flush with an upper surface of the first isolation subsection 231 and an upper surface of the second isolation subsection 232.

The filler blocks 234 in the embodiment of the present application are preformed, and the material of the filler blocks 234 is the same as that of the second prepreg. The filling block 234 is approximately triangular in shape and has three surfaces, wherein two equal-length surfaces are respectively contacted with the isolation parts on two sides, so as to improve the molding quality of the isolation prepreg 220.

And S150, continuously laying a plurality of layers of second prepregs layer by layer along with the shape on the upper surfaces of the first isolation subsection 231 and the second isolation subsection 232 so as to form the first isolation prepreg 220.

S160, pre-pressing each layer of the second prepreg to form the isolation prepreg 220, and peeling the isolation prepreg 220 from the second mold 400.

In the embodiment of the application, the pre-pressing process is a mode of vacuumizing pre-pressing or rolling after the prepreg is laid, so that the contact effect between adjacent prepregs is improved, and interlayer bubbles are prevented. To further enhance the integrated molding effect of the multi-cavity structure 100.

The first isolation prepreg 220 is provided with a second overlap portion matched with the first overlap portion, the second laying area 402 is provided with a plurality of first limiting tables 440 in a stacking manner, and the distances from the plurality of first limiting tables 440 to the first laying area 401 gradually decrease along the stacking direction away from the die surface of the second laying area 402; the fourth laying area 404 is provided with a plurality of second limiting tables 450 in a stacked manner, and the distances from the second limiting tables 450 to the first laying area 401 gradually decrease along the stacking direction away from the die surface of the fourth laying area 404.

Forming a second lap joint on the first insulation prepreg part 220, the method comprising:

S111, paving a preset number of layers of the second prepreg layer by layer on the first paving region 401 on the first half mould 420, and extending each layer of the second prepreg layer from the first paving region 401 to the end part, corresponding to the paving layer, of the first limiting table 440 on the second paving region 402 until the end part is flush with the surface of the corresponding first limiting table 440; continuing to lay down a next lay-up of a second prepreg extending from the second lay-down area 402 and covering the surface of the corresponding first stop block 440; until all of the second prepreg layup for shaping the first separator segment 231 is completed.

S112, paving a preset layer number of the second prepregs layer by layer on the third paving region 403 on the second half mould 430, and extending each layer of the second prepregs from the third paving region 403 to the end part, corresponding to the second limiting table 450, of the paving layer on the fourth paving region 404 until the second prepregs are level with the surface of the corresponding second limiting table 450; continuing to lay down a next stack of second prepregs extending from the fourth lay down area 404 and covering the surfaces of the corresponding second stop tables 450; until all of the second prepreg layup used to form the second isolated sub 232 is complete.

S200, providing a first mold 300, wherein the first mold 300 comprises a first block mold 320-1 and a second block mold 320-2, the first block mold 320-1 corresponds to the shape of the first cavity 110, the second block mold 320-2 corresponds to the shape of the second block mold 320-2, and multiple layers of prepreg are independently laid on the first block mold 320-1 and the second block mold 320-2 in advance to form a first body 101 prepreg portion and a second body 101 prepreg portion.

Specifically, the method of forming the prepreg of the first body 101 on the first block mold 320-1 includes:

s210, providing a lapping mold 330 detachably connected with the first block mold 320-1, wherein a mold combining surface is arranged on the first block mold 320-1, and the lapping mold 330 and the splicing mold 350 are both detachably arranged on the mold combining surface;

S220, extending the first prepreg laid on the first block 320-1 in a conformal manner onto the overlap mold 330, wherein the overlap mold 330 is used to form a first overlap on the prepreg of the first body 101.

The first block mold 320-1 comprises a first molding area 301, the overlap mold 330 comprises a second molding area 302 connected with the first molding area 301, a plurality of overlap tables 340 are stacked on the second molding area 302, and the overlap tables 340 are used for limiting the length of the first prepreg extending onto the overlap mold 330; the width of the plurality of the lapping stations 340 gradually decreases in the lamination direction away from the die face of the lapping die 330.

Specifically, a first lap joint is formed on the first body 101 prepreg, the method including:

S221, paving a preset number of layers of the first prepregs layer by layer, and extending each layer of the first prepregs from the first molding zone 301 to the end part of the lapping table 340 corresponding to the paved layer until the first prepregs are level with the surface of the corresponding lapping table 340;

s222, continuing laying a next layered first prepreg, which extends from the first molding zone 301 and covers the surface of the corresponding lapping table 340;

S223, until all first prepregs for molding the first body 101 prepreg are laid up to be completed to form the first body 101 prepreg.

It will be appreciated that in embodiments of the present application, the sides of the same table 340 are used to limit the lay-up length of the first prepreg of the same thickness, and that the surface of the table 340 may also be used for conformal lay-up of the next first prepreg layup 201. To form a stack of stacked layers of different lengths of the first prepreg layup 201.

S300, the first isolation prepreg 220 is installed between the first body 101 prepreg and the second body 101 prepreg, and the prepreg assembly is formed by the body sub-portion 222 being used to overlap the first body 101 prepreg and the second body 101 prepreg.

The first lap body 211 on the prepreg portion of the main body 101 and the second lap body 221 on the separation prepreg portion 220 are snapped together at corresponding positions on the first mold 300 to form the prepreg headquarters, wherein the outer side surface of the second lap body 221 and the outer side surface of the material blank main body 101 are matched to form the outer surface of the cavity, and the extension length of the first lap body 211 is matched to the extension length of the second lap body 221 at corresponding positions.

As shown in fig. 9, in an embodiment of the present application, the method for forming a prepreg headquarters includes:

s310, after the overlap mold 330 is removed from the first bottom plate, the first overlap body 211 and the second overlap body 221 are engaged at corresponding positions;

And S320, installing the splicing die 350 on the first bottom plate, and attaching and prepressing the presoaking headquarter and the third forming area 304 to form the presoaking headquarter.

S400, installing a splicing mold 350 between the first block mold 320-1 and the second block mold 320-2 to form a first mold 300, wherein the position of the splicing mold 350 corresponds to the position of the main body sub-part 222 and is pre-pressed.

S500, a first inner support member adapted to the inner shape of the first chamber 110 and a second inner support member adapted to the inner shape of the second chamber 120 are preformed, where the first inner support member and the second inner support member each include a vacuum flexible film 500, an air guide net 510 is disposed on a side surface of the vacuum flexible film 500 near the prepreg of the first main body 101, and an ultrasonic vibration sheet 540 is further disposed on the vacuum flexible film 500.

As shown in fig. 10 to 11, the vacuum soft film 500 is formed by a method including:

S510, providing a third mold, the shape of which matches the shape of the first chamber 110 or the second chamber 120, the third mold comprising a male mold and a female mold.

S520, paving an air guide net 510 and unvulcanized rubber on the female die along with the shape, wherein a first unvulcanized rubber layer 520, a third prepreg 530 layer and a second unvulcanized rubber layer 520 are arranged on the ultrasonic vibration sheet 540, and the ultrasonic vibration sheet 540 is arranged between the third prepreg 530 and the second unvulcanized rubber layer 520 or between the third prepreg 530 and the first unvulcanized rubber layer 520.

In another embodiment of the present application, an electric heating layer is further disposed on the vacuum soft film 500. The vacuum soft film 500 is formed, and the method further includes:

an electrically heated layer is disposed between the third prepreg 530 and the second unvulcanized rubber layer 520 or between the third prepreg 530 and the first unvulcanized rubber layer 520, and the vacuum soft film 500 is molded by a vulcanization process.

And S530, the male die and the female die are matched, and the vacuum soft film 500 is formed through a vulcanization process.

Optionally, the vulcanization process conditions: the method adopts a sectional heating and pressure maintaining mode, the heating rate is less than or equal to 1.5 ℃/min, the vulcanizing temperature is 175 ℃ to 210 ℃, the time is 350min to 420min, the pressure is 0.665MPa to 0.735MPa, and the whole process is kept under full vacuum.

S600, a first inner support is mounted on the first block mold 320-1, a second inner support is mounted on the second block mold 320-2, the first isolation prepreg 220 is disposed between the first inner support and the second inner support, and two sides of the first isolation prepreg 220 are respectively attached to surfaces of the first inner support and the second inner support.

And S700, forming vacuum between the vacuum soft film 500 and the first mold 300 through a vibration vacuumizing process so as to mold the multi-cavity structure 100 through a vacuum hot-pressing process.

Illustratively, evacuating through the vacuum bag, the evacuating pressure being-90 Kpa to-100 Kpa; a positive pressure of +80Kpa to +100Kpa is applied through the outside of the vacuum tank. Heating up to 125+/-10 ℃ at a heating rate of 0.5-3 ℃/min and preserving heat for 60-75 min in a vacuum tank in the curing process, continuously heating up to 175+/-5 ℃ and preserving heat for 240-255 min, continuously heating up to 200+/-5 ℃ and preserving heat for 60-75 min, continuously heating up to 230+/-5 ℃ and preserving heat for 240-255 min, then cooling down at a cooling rate lower than 1.5 ℃/min, and releasing pressure when the temperature is reduced to below 80 ℃ to finish curing. It should be noted that the process parameters are adjusted as needed in different embodiments.

Example two

As shown in fig. 12-15, the main body 101 includes a first chamber 110 and a second chamber 120 that are independent from each other, and a first isolation cavity 111 disposed between the first chamber 110 and the second chamber 120, the first chamber 110 and the second chamber 120 are distributed along a radial direction of the main body 101, a first sub-chamber 103 and a second sub-chamber 104 that are independent from each other are disposed in the first chamber 110, and a second isolation cavity 112 disposed between the first sub-chamber 103 and the second sub-chamber 104, and the first isolation cavity 111 is perpendicular to the second isolation cavity 112.

The block mold 320 includes a first block mold 320-1 and a second block mold 320-2, the first block mold 320-1 having a shape corresponding to the shape of the first chamber 110, the second block mold 320-2 having a shape corresponding to the shape of the second chamber 120, the first block mold 320-1 including a first sub-mold corresponding to the shape of the first sub-chamber 103 and a second sub-mold corresponding to the shape of the second sub-chamber 104.

The molding die includes a first molding die 411 and a second molding die 412, the first molding die 411 having a shape corresponding to the formation of the first separation chamber 111 and being used for preforming the first separation prepreg 220, and the second molding die 412 having a shape corresponding to the shape of the second separation chamber 112 and being used for preforming the second separation prepreg 220.

The first isolation prepreg portion 220 includes a first main body sub-portion 222-1 and a first isolation sub-portion 212-1, the second isolation prepreg portion 220 includes a second main body sub-portion 222-2 and a second isolation sub-portion 212-2, a first limiting portion 235 overlapping the second main body sub-portion 222-2 is provided on the first isolation sub-portion 212-1, and a second limiting portion 236 matching the first limiting portion 235 is provided on the second main body sub-portion 222-2.

A plurality of third limiting tables 460 are stacked on the third laying area 403 in the first forming mold 411, and the widths of the plurality of third limiting tables 460 gradually decrease along the stacking direction away from the die surface of the third laying area 403, so that the first limiting portions 235 with gradually increasing depths are formed on the first separator portion 212-1, and the first limiting portions 235 are in a groove shape.

A plurality of fourth limiting tables 470 are stacked on the second laying area 402 and the fourth laying area 404 in the second forming mold 412, and the widths of the fourth limiting tables 470 gradually decrease along the stacking direction away from the die surface of the second laying area 402, so that the second limiting portions 236 with gradually increasing heights are formed on the second main body sub-portion 222-2, and the second limiting portions 236 are in a convex shape.

The application provides an integral molding method of a composite material multi-cavity structure 100, and in step S100 in a corresponding embodiment, the method comprises the following steps:

A second molding die 412 is provided, a second isolation prepreg portion 220 corresponding to the second isolation cavity 112 is preformed through the second molding die 412, the first isolation prepreg portion 220 comprises a first main body sub-portion 222-1 and a first isolation sub-portion 212-1, the second isolation prepreg portion 220 comprises a second main body sub-portion 222-2 and a second isolation sub-portion 212-2, a first limit portion 235 overlapping the second main body sub-portion 222-2 is arranged on the first isolation sub-portion 212-1, and a second limit portion 236 matching the first limit portion 235 is arranged on the second main body sub-portion 222-2.

A plurality of third limiting tables 460 are stacked on the third laying area 403 in the first forming mold 411, and the widths of the plurality of third limiting tables 460 gradually decrease in a stacking direction away from the die surface of the third laying area 403, so as to form the first limiting portions 235 with gradually increasing depths on the first separator portion 212-1.

A plurality of fourth limiting tables 470 are stacked on each of the second laying area 402 and the fourth laying area 404 in the second forming mold 412, and the widths of the fourth limiting tables 470 gradually decrease in a stacking direction away from the die surface of the second laying area 402, so as to form the second limiting portions 236 having gradually increasing heights on the second main body sub-portion 222-2.

The first separator 212-1 includes a first side surface and a second side surface opposite to each other, the first side surface is located at one side of the first cavity, the second side surface is located at one side of the second cavity, and the first stopper 235 is disposed on the second side surface.

A third limiting table 460 is provided on the third laying area 403 in the first forming die 411.

The method of forming the first stopper 235 includes:

S101, laying multiple layers of first prepregs on the third laying area 403 along with the shape, so as to form the first limiting portion 235 on the second side surface, where the first limiting portion 235 is in a groove shape, and the depth of the first limiting portion 235 gradually increases from the edge of the groove to the direction of the center.

It can be understood that, in the embodiment of the present application, the first side surface and the second side surface of the first separator 212-1 formed on the third laying area 403 are laid in a random manner, so that the first side surface is also laid in a random manner with a groove structure, and in the embodiment of the present application, the groove shape on the first side surface does not affect the function of the first separator 212-1. Of course, in other embodiments, the shape on the first side surface may be reshaped by the surface of the vacuum bladder 500 to achieve the desired shape.

The second main body sub-portion 222-2 includes a second outer surface and a second inner surface disposed opposite to each other, the second overlap portion is disposed on the second inner surface, and the second limit portion 236 is disposed on the second outer surface.

Correspondingly, the second laying area 402 and the fourth laying area 404 in the second forming die 412 comprise a first end connected to the first laying area 401 and a second end remote from the first laying area 401, the first limit station 440 and the second limit station 450 being arranged on the second ends, respectively, and the fourth limit station 470 being arranged on the first ends.

The method of forming the second stopper 236 includes:

s102, performing conformal laying on a second prepreg laid on the first laying area 401 to a second end on the second laying area 402 through a fourth limiting table 470;

S103, the second prepreg which is laid on the third laying area 403 in a conformal manner is laid on a second end of the fourth laying area 404 in a conformal manner through a fourth limiting table 470;

And S104, after the isolation part on the first half mould 420 is contacted with the isolation part on the second half mould 430, the second limiting part 236 is formed on the second outer surface of the second main body sub-part 222-2, the second limiting part 236 is in a convex shape, and the height of the second limiting part 236 gradually increases from the convex edge to the center.

It will be appreciated that in the embodiment of the present application, the second side surface and the second side surface of the second main body sub-portion 222-2 formed on the first laying area and the third laying area are both laid in a conformal manner, and therefore, the groove-shaped structure is laid on the second side surface in a conformal manner, and in the embodiment of the present application, the groove-shaped structure on the second side surface does not affect the function of the second separator sub-portion. Of course, in other embodiments, the shape on the second side surface may be reshaped by the surface of the vacuum bladder to achieve the desired shape.

It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are merely for convenience in describing and simplifying the description based on the orientation or positional relationship shown in the drawings, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the invention. Terms such as "disposed" or the like as used herein may refer to either one element being directly attached to another element or one element being attached to another element through an intermediate member. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the embodiments described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the teachings of the invention, which variations and modifications are within the scope of the invention as claimed.

Claims

1. The utility model provides an on-vehicle multicavity structure integrated into one piece's assembling die, its characterized in that, multicavity structure includes the main part, main part internal partition is a plurality of cavities of mutually independent, and adjacent two be provided with between the cavity and keep apart the cavity, the mould includes:

A second mold including a plurality of molding dies for preforming an isolation prepreg for forming the isolation cavity; the isolation prepreg comprises a main body sub-part corresponding to the main body and an isolation sub-part corresponding to the isolation cavity, wherein the main body sub-part is used for being overlapped with the main body prepreg to form the main body; the second die comprises a second base, and a first half die and a second half die which are arranged on the second base, wherein a first paving area and a second paving area are arranged on the first half die, the directions of the first paving area and the second paving area are intersected, and the shape of the first paving area is matched with the shape of the isolation cavity; the shape of the second laying area is matched with the shape of the main body; a third paving region and a fourth paving region are arranged on the second half mould, the directions of the third paving region and the fourth paving region are intersected, and the shape of the third paving region is matched with the shape of the isolation cavity; the shape of the fourth paving area is matched with the shape of the main body; the first paving area and the third paving area are arranged opposite to each other and used for forming the isolator part between the first paving area and the third paving area; the second laying area and the fourth laying area are arranged along the same extension direction so as to form the main body sub-part on the first laying area and the second laying area;

2. The integrated mold assembly of claim 1, comprising a bridge mold removably connected to the block mold, the block mold having a molding surface, the bridge mold and the splice mold being removably disposed on the molding surface, the bridge mold being configured to extend a first prepreg laid in a shape onto the block mold in a shape onto the bridge mold, the bridge mold being configured to form a first bridge portion on the body prepreg.

3. The integrated mold assembly of claim 2, wherein the block mold comprises a first molding zone, the overlap mold comprises a second molding zone connected to the first molding zone, and a plurality of overlap tables are stacked on the second molding zone, and the overlap tables are used for limiting the length of the first prepreg extending onto the overlap mold; the widths of the plurality of lapping tables gradually decrease along the stacking direction of the die surfaces far away from the lapping die; the second forming area is used for forming a first lap joint part with gradually increased length along the laying level direction.

4. The integrated mold assembly of claim 3, wherein the two ends of the main body sub-portion are respectively provided with a second lap joint portion which is matched with the adjacent two main body pre-impregnated portions independently, wherein,

5. The mold assembly of claim 4, wherein each of the plurality of bridging stations has a thickness that is an integer multiple of the thickness of the first prepreg, each of the plurality of first limiting stations has a thickness that is an integer multiple of the thickness of the second prepreg, and each of the plurality of second limiting stations has a thickness that is an integer multiple of the thickness of the second prepreg.

6. The combined die for integrally forming the airborne multi-cavity structure according to claim 3, wherein the main body comprises a first cavity and a second cavity which are mutually independent, and a first isolation cavity arranged between the first cavity and the second cavity, the first cavity and the second cavity are distributed along the radial direction of the main body, a first sub-cavity and a second sub-cavity which are mutually independent, and a second isolation cavity arranged between the first sub-cavity and the second sub-cavity are arranged in the first cavity, and the first isolation cavity is perpendicular to the second isolation cavity; wherein,

7. The integrated mold assembly of claim 6, wherein the first isolation prepreg portion comprises a first main body sub-portion and a first isolation sub-portion, the second isolation prepreg portion comprises a second main body sub-portion and a second isolation sub-portion, the first isolation sub-portion is provided with a first limiting portion overlapping the second main body sub-portion, the second main body sub-portion is provided with a second limiting portion matching the first limiting portion, wherein,

8. An on-board multi-cavity structure, characterized in that the structure is formed by integrally forming a combined die of the on-board multi-cavity structure according to any one of claims 1-7.

9. An integrated molding method of an airborne multi-cavity structure, characterized in that a combined mold for integrated molding of the airborne multi-cavity structure according to any one of claims 2 to 7 is adopted, and the method comprises:

The isolation prepreg is arranged between the main body prepreg on two adjacent block molds, and the main body prepreg are overlapped through the main body sub-parts;