Composite material cabin forming die with mouth frame and reinforcing rib characteristics

Abstract

The invention relates to a composite cabin forming die with the characteristics of a mouth frame and reinforcing ribs. The composite cabin forming die comprises a core cylinder unit, a male die unit arranged on the outer side of the core cylinder unit, a female die unit arranged on the outer side of the male die unit, a front end mounting unit and a rear end mounting unit. The male die unit comprises a front area male die module, a rear area male die module and a compound die which are coaxially arranged; the front-area male mold module and the rear-area male mold module are respectively and detachably connected with the core cylinder unit; the compound die is of an annular structure; wherein the composite die is a variable gradient composite elastic plate made of talcum powder modified thermal expansion silicone rubber; the compound die is fixed between the front area male die module and the rear area male die module, and an annular groove is formed among the front area male die module, the compound die and the rear area male die module. The method has the advantages of low risk, low cost and high-quality molding of the cabin with a complex structure inside.

Description

Technical Field

[0001] The invention relates to the field of aerospace, and in particular to a composite cabin forming die with features of a mouth frame and reinforcing ribs. Background Art

[0002] Missiles, as the most direct weapon for strategic deterrence and actual combat applications, have always occupied the most important position in the military industry. Traditional missile cabins use metal structures, which are relatively heavy and affect the range of missiles. With the development of composite material technology, high-performance composite materials have better specific strength and specific stiffness than traditional metal materials, and can meet the current high Mach, long flight time, and large load application requirements. The proportion of composite materials continues to increase.

[0003] At present, the molding process of this type of product is mainly based on the autoclave process. The prepared prepreg is applied layer by layer on the mold according to the design state, and finally put into the autoclave under vacuum negative pressure. The product is cured at a positive pressure of 0.3MPa~0.6MPa in the tank and the corresponding curing temperature. The molding molds of this type of product are generally divided into single-negative molds, single-positive molds, and combined positive-negative molds according to the product structure. The molds are divided into blocks according to the specific product structure to achieve the demoulding function. Among them, single-negative molds and single-positive molds are suitable for products with simple product structures and low requirements for single-sided dimensional accuracy; combined positive-negative molds are suitable for products with complex product structures and high requirements for both internal and external surfaces. For mold materials, the selected materials must meet the requirements of surface stability under the use temperature and pressure. In addition, the selected materials should be as consistent as possible with the thermal expansion coefficient of the materials used in the production of the product, so as to control the generation of large internal stress during the curing process and reduce the deformation caused by stress release after demoulding. At present, the most widely used autoclave mold materials are mostly steel or aluminum alloy. The advantages of this type of mold are easy processing and good thermal conductivity. Among them, the excellent performance of Invar alloy has a thermal expansion coefficient that is basically close to that of carbon fiber composite materials, and has good thermal matching, which can effectively reduce the deformation risk of large-sized and complex-shaped products. However, the common disadvantage of the above-mentioned metal molds is that the mold weight is relatively heavy, and except for Invar alloy, the thermal expansion coefficient of this type of material is quite different from that of carbon fiber composite materials, and the dimensional accuracy of the parts is relatively difficult to control. In addition to metal materials, autoclave mold materials also include carbon fiber composite materials. The advantage of this type of mold is that the thermal expansion coefficient is consistent with that of composite materials, light weight, and good thermal conductivity. The disadvantages are low hardness, high manufacturing and maintenance costs, and easy problems with airtightness.

[0004] Before composite materials were used as replacements for bomb bays flying under high Mach conditions, they were generally cast and machined using high-quality alloys using a casting process. The advantage is that the mold is relatively simple, but due to poor molding accuracy, a large area needs to be processed. Considering weight reduction and performance improvement, after using composite materials as replacements, composite materials are generally used as the main body molding, and the frame, ribs, beams, etc. are molded separately using composite materials or metal materials and then assembled by gluing, or the main body and frame, ribs, and beam structures are co-cured as a whole. Of the above two composite cabin molding ideas, the former has the advantage that the main body and frame, ribs, and beams are molded separately, and the molding mold structure design and molding difficulty are small. If there is a problem with the molding of a certain part, it can be replaced accordingly without affecting the overall quality. Its disadvantage is that the assembly tooling structure is complex, the number of required tools and molds is large, the processing accuracy requirements are high, and the process operation is difficult. For the latter, the main advantage is that the relevant process steps are completed on the homogeneous molding mold, and the process operation is relatively simple. At the same time, the co-curing molding can achieve fiber interlacing between structures through layer design. Compared with post-bonding at the bonding surface, it has better structural stability. Its disadvantage is that the mold design is complicated. Unreasonable mold design often causes local defects, resulting in the scrapping of the entire product. Summary of the invention

[0005] The object of the present invention is to provide a composite cabin forming die with features of a mouth frame and reinforcing ribs.

[0006] To achieve the above-mentioned purpose, the present invention provides a composite cabin molding die with a mouth frame and reinforcing ribs, comprising: a core barrel unit, a male mold unit arranged outside the core barrel unit, a female mold unit arranged outside the male mold unit, a front end mounting unit and a rear end mounting unit; The male mold unit comprises: a front area male mold module, a rear area male mold module and a composite mold which are coaxially arranged; The front zone male mold module and the rear zone male mold module are respectively detachably connected to the core barrel unit; The composite mold is an annular structure; wherein the composite mold is a variable gradient composite elastic plate made of talcum powder modified thermal expansion silicone rubber; The composite mold is fixed between the front area male mold module and the rear area male mold module, and an annular groove is formed between the front area male mold module, the composite mold and the rear area male mold module.

[0007] According to one aspect of the present invention, the front area male mold module comprises: a plurality of front area male mold assemblies and a window stop assembly; The plurality of front zone male mold assemblies are detachably connected to the core barrel unit, and the plurality of front zone male mold assemblies are arranged to be spliced ​​with each other according to a preset rule; The window stop assembly and the front zone male mold assembly are connected to each other in a detachable manner; or, The plurality of front zone male mold assemblies and the window stopper assemblies are respectively detachably connected to the core barrel unit, and the plurality of front zone male mold assemblies and the window stopper assemblies are arranged to be spliced ​​with each other according to preset rules.

[0008] According to one aspect of the present invention, the rear area male mold module comprises: a plurality of rear area male mold assemblies; The plurality of rear zone male mold assemblies are detachably connected to the core barrel unit, and the plurality of rear zone male mold assemblies are arranged to be spliced ​​with each other according to preset rules.

[0009] According to one aspect of the present invention, the front end surface of the front zone male mold module is provided with a first annular protrusion; The rear end face of the first annular protrusion is arranged to coincide with the front end face of the front zone male mold module; The front end face of the first annular protrusion and the front end face of the front zone male mold module are arranged at an angle, wherein the radial outer edge of the front end face of the first annular protrusion coincides with the radial outer edge of the front end face of the front zone male mold module, and the radial inner edge of the front end face of the first annular protrusion is spaced from the front end face of the front zone male mold module; The inclination angle of the front end surface of the first annular protrusion is 0.5° to 1°; The rear end surface of the rear zone male mold module is provided with a second annular protrusion; The front end face of the second annular protrusion is arranged to coincide with the rear end face of the rear zone male mold module; The rear end face of the second annular protrusion is set at an angle with the rear end face of the rear zone male mold module, wherein the radial outer edge of the rear end face of the second annular protrusion is set to coincide with the radial outer edge of the rear end face of the rear zone male mold module, and the radial inner edge of the rear end face of the second annular protrusion is set to be spaced from the rear end face of the rear zone male mold module; The inclination angle of the rear end surface of the second annular protrusion is 0.5° to 1°.

[0010] According to one aspect of the present invention, the front end of the rear zone male mold module is provided with an annular positioning protrusion; The annular positioning protrusion is connected to the inner edge of the front end of the rear area male mold module, and the annular positioning protrusion is extended in a direction away from the front end of the rear area male mold module; The composite mold sleeve is arranged on the outer side of the annular positioning protrusion.

[0011] According to one aspect of the present invention, the core barrel unit comprises: a front zone core barrel module and a rear zone core barrel module which are coaxially arranged; The front zone core barrel module and the rear zone core barrel module are coaxially and detachably connected; The front end of the rear core barrel module is provided with an annular connecting protrusion, and the radial dimension of the annular connecting protrusion is smaller than the radial dimension of the rear core barrel module; The annular connection protrusion is connected to the rear end of the front core barrel module by abutment; The front zone male mold module is installed on the outside of the front zone core barrel module, and the rear zone male mold module is installed on the outside of the rear zone core barrel module; The annular positioning protrusion of the rear zone male mold module and the annular connecting protrusion are matched with each other and nested and connected.

[0012] According to one aspect of the present invention, the female mold unit comprises: a plurality of female mold modules and a fixed clamp; A plurality of the female mold modules are spliced ​​with each other according to a preset rule and sleeved on the outside of the male mold unit; The fixed clamp is sleeved on the outside of the female mold module and is used to fix the plurality of female mold modules; A plurality of fixed clamps are provided along the axial direction of the female mold unit.

[0013] According to one aspect of the present invention, the front end mounting unit comprises: a front end support shaft assembly, a front end cover and a front end flexible strain ring; The front end support shaft assembly comprises: a front end support shaft body, and a front end connecting plate body coaxially arranged with the front end support shaft body; The front end connecting plate body is detachably connected to the front end of the front zone core barrel module; The front end cover is an annular end cover as a whole, and a first fitting groove and a second fitting groove are arranged on the rear side thereof; The first engaging groove is engaged and connected with the front connecting plate body in a shape matching with the front connecting plate body; The second engaging groove is an annular groove, and is engaged and connected with the front flexible strain ring in cooperation; The thickness of the front flexible strain ring is greater than the depth of the second fitting groove; The front end cover is detachably connected to the front end of the female mold unit, and the front end flexible strain ring is arranged opposite to the front end of the male mold unit; The rear end mounting unit comprises: a rear end support shaft assembly, a rear end cover and a rear end flexible strain ring; The rear end support shaft assembly comprises: a rear end support shaft body, and a rear end connecting plate body coaxially arranged with the rear end support shaft body; The rear end connecting plate body is detachably connected to the rear end of the rear zone core barrel module; The rear end cover is an annular end cover as a whole, and a third fitting groove and a fourth fitting groove are arranged on the front side thereof; The third engaging groove is engaged and connected with the rear end connecting plate body in a shape matching with the shape of the rear end connecting plate body; The fourth engaging groove is an annular groove, and is engaged and connected with the rear flexible strain ring in a matching manner; The thickness of the rear end flexible strain ring is greater than the depth of the fourth engaging groove; The rear end cover is detachably connected to the rear end of the female mold unit, and the rear end flexible strain ring is arranged opposite to the rear end of the male mold unit.

[0014] According to one aspect of the present invention, the front flexible strain ring and the rear flexible strain ring are respectively made of expansion core pads; The front flexible strain ring is connected to the front cover by using adhesive; The rear end flexible strain ring is connected to the rear end cover by using an adhesive.

[0015] According to one aspect of the present invention, the composite mold comprises: a first mold layer, a second mold layer and a third mold layer connected in sequence; The composite mold is obtained based on the following steps: S1. Preparing a first mold layer; The heat-expandable silicone rubber, the curing agent and the talcum powder are weighed in a mass ratio of 10:1:5.5, introduced into a stirring kettle and stirred for 10 to 15 minutes to obtain a first mixed material; The first mixed material is introduced into a degassing tank for vacuum degassing for 8 minutes to 10 minutes; The first mixed material after degassing is poured according to a first preset thickness, and cured for 24 hours in an environment with a temperature of 22°C ± 4°C and a humidity of <55%, so as to obtain the first mold layer; S2. Preparing a second mold layer; The heat-expandable silicone rubber, the curing agent and the talcum powder are weighed in a mass ratio of 10:1:2.5, introduced into a stirring kettle and stirred for 10 to 15 minutes to obtain a second mixed material; The second mixed material is introduced into a degassing tank for vacuum degassing for 8 minutes to 10 minutes; The second mixed material after degassing is poured on the first mold layer according to a second preset thickness, and cured for 24 hours in an environment with a temperature of 22°C ± 4°C and a humidity of <55%, so as to obtain the second mold layer; S3. Preparing a third mold layer; The heat-expandable silicone rubber and the curing agent are weighed in a mass ratio of 10:1, introduced into a stirring kettle and stirred for 10 to 15 minutes to obtain a third mixed material; The third mixed material is introduced into a degassing tank for vacuum degassing for 8 minutes to 10 minutes; The degassed third mixed material is poured onto the second mold layer according to a third preset thickness, and cured for 24 hours in an environment with a temperature of 22°C ± 4°C and a humidity of <55%, so as to obtain the third mold layer; S4. Trimming the composite mold layer based on a preset shape and a preset size to obtain the composite mold.

[0016] According to one scheme of the present invention, the composite cabin molding mold of the present invention can achieve near-net-size co-curing molding of a composite cabin with mouth frames and reinforcing rib features, which effectively solves the problem of relying on post-processing and assembly tooling to ensure structural accuracy under the current secondary bonding process, and achieves low-risk, low-cost, high-quality molding of cabins with complex internal structures.

[0017] According to one solution of the present invention, the present invention can conveniently ensure the operability of variable thickness window area lamination during the carbon fiber lamination process by setting a window limit assembly in the male mold unit. In addition, the window limit assembly is designed separately and is processed integrally with the front area male mold assembly after integral assembly to ensure the convenience of demolding the composite cabin and the dimensional accuracy of the window area.

[0018] According to one scheme of the present invention, by setting a 0.5°~1° compensating rebound angle at the end of the front zone male mold module, the present invention effectively ensures that the angle between the rear end frame and the side wall of the composite material cabin after demolding is compensated to a close to theoretical angle during deformation rebound, thereby effectively ensuring the molding accuracy of the composite material cabin.

[0019] According to one scheme of the present invention, the present invention sets a 0.5°~1° compensating rebound angle at the end of the rear zone male mold module, thereby effectively ensuring that the angle between the rear end frame and the side wall of the composite material cabin after demolding is compensated to a close to theoretical angle during deformation rebound, thereby effectively ensuring the molding accuracy of the composite material cabin.

[0020] According to one solution of the present invention, the composite mold of the present invention can effectively ensure the internal quality and external dimensions of the large-sized annular reinforcement ribs between the front zone male mold module and the rear zone male mold module; specifically, the composite mold is made of a variable gradient composite elastic layer by modifying the thermal expansion silicone rubber with talcum powder, and the closer it is to the product contact surface, the greater the hardness of the silicone, and the farther away from the contact surface, the greater the silicone expansion rate. Therefore, the composite mold can provide pressure through its own thermal expansion, increase the pressure area of ​​the annular reinforcement ribs, and ensure the internal quality of the product. At the same time, since it is a variable gradient composite elastic material, compared with a single gradient silicone rubber, the deformation near its surface is smaller, and the molding precision control is better. In addition, due to the obvious difference in thermal expansion coefficients between the front zone male mold module and the rear zone male mold module of the aluminum alloy and the carbon fiber composite material, in the cooling and shrinking stage after curing, the parts similar to the annular reinforcement ribs will be subjected to the shear force generated by the shrinkage of the mold unit, which is easy to cause quality defects in the annular reinforcement ribs. The composite mold filling method can use the composite mold as a buffer layer to effectively reduce the corresponding risks.

[0021] According to one solution of the present invention, by setting a front flexible strain ring and a rear flexible strain ring, it can play the main role of uniformly transmitting pressure and sealing glue in the composite cabin molding mold. Through this structure, when the external pressure is transmitted to the end frame of the composite cabin between the flexible strain ring and the male mold unit through the pressure plate, the pressure transmission can be better achieved through the adaptive deformation of the material. At the same time, the material also has certain expansion characteristics, which can effectively ensure that the end frame of the composite cabin is fully pressurized and reduce quality risks. In addition, the flexible strain ring can also effectively block the overflow of resin during the molding process, reduce the risk of glue shortage and ensure pressure stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a cross-sectional view schematically showing a composite cabin body forming mold according to an embodiment of the present invention; Figure 2 is a perspective view schematically showing a composite cabin body forming mold according to an embodiment of the present invention; Figure 3 is a perspective view schematically showing a male mold unit in a composite cabin molding mold according to an embodiment of the present invention; Figure 4 is an exploded view schematically showing a composite cabin body forming mold according to an embodiment of the present invention; Figure 5 is a partial cross-sectional view schematically showing a front zone male mold module according to one embodiment of the present invention; Figure 6 is a partial cross-sectional view schematically showing a rear zone male mold module according to one embodiment of the present invention; Figure 7is a cross-sectional view schematically showing a front area male mold module in a composite cabin molding mold according to an embodiment of the present invention; Figure 8 It is a cross-sectional view schematically showing a rear area male mold module in a composite cabin molding mold according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments cannot be described one by one here, but the embodiments of the present invention are not therefore limited to the following embodiments.

[0026] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, according to one embodiment of the present invention, a composite cabin molding die with a mouth frame and reinforcing ribs of the present invention comprises: a core barrel unit 1, a male mold unit 2 arranged outside the core barrel unit 1, a female mold unit 3 arranged outside the male mold unit 2, a front-end mounting unit 4 and a rear-end mounting unit 5. In this embodiment, the core barrel unit 1 is the supporting body in the entire molding die, the male mold unit 2 is used for carbon fiber winding of the composite cabin and subsequent infusion molding, and the female mold unit 3 is used to mold the outer surface of the composite cabin, thereby, the combination of the male mold unit 2 and the female mold unit 3 realizes the molding of the composite cabin, and the core barrel unit 1 provides reliable support for the reliable and net size molding of the male mold unit 2 and the female mold unit 3. In this embodiment, the core barrel unit 1 is a hollow cylindrical structure as a whole, and its shape change needs to match the male mold unit 2, that is, the overall shape of the core barrel unit 1 is determined according to the product to be molded.

[0027] In this embodiment, the male mold unit 2 is detachably mounted on the outside of the core barrel unit 1, wherein the male mold unit 2 and the core barrel unit 1 can be accurately mounted and fixed by a combination of positioning pins and threaded connectors. The male mold unit 2 includes: a coaxially arranged front-zone male mold module 21, a rear-zone male mold module 22 and a compound mold 23; in this embodiment, the front-zone male mold module 21 and the rear-zone male mold module 22 are detachably connected to the core barrel unit 1, respectively; wherein the front-zone male mold module 21 and the rear-zone male mold module 22 are still detachably mounted by a combination of positioning pins and threaded connectors to ensure the accuracy of the installation. In this embodiment, the front-zone male mold module 21 and the rear-zone male mold module 22 are made of aluminum alloy materials, respectively.

[0028] In this embodiment, the compound mold 23 is an annular structure; wherein the compound mold 23 is a variable gradient composite elastic plate made of talcum powder modified thermal expansion silicone rubber; wherein the compound mold 23 is fixed between the front area male mold module 21 and the rear area male mold module 22, and an annular groove is formed between the front area male mold module 21, the compound mold 23 and the rear area male mold module 22. In this embodiment, the outer diameter of the compound mold 23 is smaller than the outer diameter of the ends of the front area male mold module 21 and the rear area male mold module 22 on its front and rear sides, so as to realize the formation of the annular groove, thereby forming an annular reinforcement rib inside the composite cabin. It should be noted that the compound mold 23 in the present application scheme can be set not only as one, but also as multiple. If multiple compound molds 23 are set, the male mold unit 2 can be further segmented in the axial direction accordingly, so as to facilitate the installation of a corresponding number of compound molds 23 to form a corresponding number of annular reinforcement ribs.

[0029] Through the above-mentioned setting, the composite mold 23 of the present invention can effectively ensure the internal quality and external dimensions of the large-sized annular reinforcement ribs between the front zone male mold module 21 and the rear zone male mold module 22; specifically, the composite mold 23 is made of a variable gradient composite elastic layer by modifying the thermal expansion silicone rubber with talcum powder. The closer it is to the product contact surface, the greater the hardness of the silicone, and the farther away from the contact surface, the greater the expansion rate of the silicone. Therefore, the composite mold 23 can provide pressure through its own thermal expansion, increase the pressure area of ​​the annular reinforcement ribs, and ensure the internal quality of the product. At the same time, since it is a variable gradient composite elastic material, compared with a single gradient silicone rubber, the deformation near its surface is smaller, and the molding precision control is better. In addition, due to the obvious difference in thermal expansion coefficients between the front zone male mold module 21 and the rear zone male mold module 22 of the aluminum alloy and the carbon fiber composite material, in the cooling and shrinking stage after curing, the parts similar to the annular reinforcement ribs will be subjected to the shear force generated by the shrinkage of the mold unit, which is easy to cause quality defects in the annular reinforcement ribs. The composite mold 23 can be used as a buffer layer by filling it with the composite mold 23, effectively reducing the corresponding risks.

[0030] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 7 As shown, according to one embodiment of the present invention, the male mold unit 2 is the foundation for the carbon fiber layer in the composite cabin, and is responsible for ensuring the shape and size of the inner surface of the product. Therefore, the net size laying of the entire composite cabin layer can be achieved through the male mold unit 2, so as to achieve the net size molding of the composite cabin by the molding mold of the present invention. In the present embodiment, the front area male mold module 21 includes: a plurality of front area male mold components 211 and a window limit component 212; wherein, the plurality of front area male mold components 211 are respectively detachably connected to the core barrel unit 1, and the plurality of front area male mold components 211 are arranged to be spliced ​​with each other according to preset rules; in the present embodiment, in the axial direction of the core barrel unit 1, the relative two sides of each front area male mold component 211 are inclined away from each other (that is, the cross-section of the front area male mold component 211 along the axial direction of the core barrel unit 1 adopts a trapezoidal or quasi-trapezoidal structure), so that the relative two sides of the front area male mold component 211 form corresponding draft angles, so as to facilitate the splicing of two adjacent front area male mold components 211 in an alternating state, and further facilitate the smooth demolding of each front area male mold component 211. In this embodiment, the angle of inclination of the two opposite sides of each front-zone male mold assembly 211 in the direction away from each other can be set to 6°, that is, the draft angle is 6°; further, in the radial direction of the core barrel unit 1, the two opposite sides of each front-zone male mold assembly 211 can be set to be inclined in the direction away from each other (that is, the cross-section of the front-zone male mold assembly 211 along the radial direction of the core barrel unit 1 adopts a trapezoidal or quasi-trapezoidal structure), so that the two opposite sides of the front-zone male mold assembly 211 form corresponding draft angles, so as to facilitate the splicing of two adjacent front-zone male mold assemblies 211 in an alternating state, and further facilitate the smooth demoulding of each front-zone male mold assembly 211. In this embodiment, the angle of inclination of the two opposite sides of each front-zone male mold assembly 211 in the direction away from each other can be set to 6°, that is, the draft angle is 6°.

[0031] In this embodiment, the window stop assembly 212 and the front area male mold assembly 211 are detachably connected to each other; wherein, the window stop assembly 212 can also be positioned and installed with the adjacent front area male mold assembly 211 by using a positioning pin and a threaded connector. The provided window stop assembly 212 is used to assist in the net size forming of the mouth frame portion on the composite cabin. In this embodiment, a groove position for installing the window stop assembly 212 can be pre-set on the spliced ​​front area male mold assembly 211 to facilitate the installation of the window stop assembly 212 at the groove position; accordingly, the size of the window stop assembly 212 is smaller than the opening size of the groove position, thereby, an annular gap can be formed between the window stop assembly 212 and the groove wall at the groove position, thereby, facilitating the formation of a window inner ring edge corresponding to the window on the composite cabin at the annular gap position, thereby achieving the net size forming of the window position. In this embodiment, in the radial direction of the male mold unit 2, the outer surface of the window limiting assembly 212 is protruding to achieve abutment with the female mold unit 3, thereby achieving net size molding of the window shape.

[0032] According to another embodiment of the present invention, a plurality of front-zone male mold assemblies 211 and window stopper assemblies 212 are detachably connected to the core barrel unit 1, and a plurality of front-zone male mold assemblies 211 and window stopper assemblies 212 are arranged to be spliced ​​with each other according to preset rules. In this embodiment, in the axial direction of the core barrel unit 1, the two opposite sides of each front-zone male mold assembly 211 are tilted in a direction away from each other (that is, the cross-section of the front-zone male mold assembly 211 along the axial direction of the core barrel unit 1 adopts a trapezoidal or quasi-trapezoidal structure), so that the two opposite sides of the front-zone male mold assembly 211 form corresponding draft angles, so as to facilitate the splicing of two adjacent front-zone male mold assemblies 211 in an alternating state, and further facilitate the smooth demoulding of each front-zone male mold assembly 211. In this embodiment, the inclination angle of the two opposite sides of each front-zone male mold assembly 211 in a direction away from each other can be set to 6°, that is, the draft angle is 6°. Furthermore, in the radial direction of the core barrel unit 1, the two opposite sides of each front-zone male mold assembly 211 can be tilted away from each other (i.e., the cross section of the front-zone male mold assembly 211 along the radial direction of the core barrel unit 1 adopts a trapezoidal or quasi-trapezoidal structure), so that the two opposite sides of the front-zone male mold assembly 211 form corresponding draft angles, so as to facilitate the splicing of two adjacent front-zone male mold assemblies 211 in an alternating state, and further facilitate the smooth demoulding of each front-zone male mold assembly 211. In this embodiment, the inclination angle of the two opposite sides of each front-zone male mold assembly 211 in the direction away from each other can be set to 6°, that is, the draft angle is 6°.

[0033] Furthermore, the window stop assembly 212 adopts the same setting as the front zone male mold assembly 211, so as to realize the detachable connection with the core barrel unit 1, and also facilitate the splicing with the adjacent front zone male mold assembly 211, wherein the window stop assembly 212 and the core barrel unit 1 are positioned and installed by means of positioning pins and threaded connectors. In this embodiment, the upper end of the window stop assembly 212 is provided with an annular gap corresponding to the window on the composite material cabin body, thereby facilitating the formation of the inner ring edge of the window corresponding to the window on the composite material cabin body at the position of the annular gap, thereby achieving the net size molding of the window position, and in this embodiment, in the radial direction of the male mold unit 2, the outer surface of the window stop assembly 212 is convexly arranged to achieve abutment with the female mold unit 3, thereby achieving the net size molding of the window shape.

[0034] Combination Figure 1 , Figure 2 , Figure 4 and Figure 8 As shown, according to one embodiment of the present invention, the rear area male mold module 22 includes: a plurality of rear area male mold assemblies 221; in the present embodiment, the plurality of rear area male mold assemblies 221 are respectively detachably connected to the core barrel unit 1, and the plurality of rear area male mold assemblies 221 are arranged to be spliced ​​with each other according to preset rules; wherein, the rear area male mold assembly 221 can use positioning pins and threaded connectors to achieve detachable connection with the core barrel unit 1.

[0035] Combination Figure 4 , Figure 5 and Figure 6 As shown, according to one embodiment of the present invention, the front end face of the front zone male mold module 21 is provided with a first annular protrusion 21a; in this embodiment, the rear end face of the first annular protrusion 21a is arranged to coincide with the front end face of the front zone male mold module 21; the front end face of the first annular protrusion 21a and the front end face of the front zone male mold module 21 are arranged to have an angle, wherein the radial outer edge of the front end face of the first annular protrusion 21a coincides with the radial outer edge of the front end face of the front zone male mold module 21, and the radial inner edge of the front end face of the first annular protrusion 21a is arranged to have a spacing with the front end face of the front zone male mold module 21, thereby making the front end face of the first annular protrusion 21a inclined, so as to realize the formation of a rebound angle at the front end of the front zone male mold module 21. In this embodiment, the inclination angle of the front end face of the first annular protrusion 21a is 0.5° to 1°.

[0036] Further, the rear end face of the rear area male mold module 22 is provided with a second annular protrusion 22a1; in this embodiment, the front end face of the second annular protrusion 22a1 is arranged to coincide with the rear end face of the rear area male mold module 22; the rear end face of the second annular protrusion 22a1 and the rear end face of the rear area male mold module 22 have an angle, wherein the radial outer edge of the rear end face of the second annular protrusion 22a1 coincides with the radial outer edge of the rear end face of the rear area male mold module 22, and the radial inner edge of the rear end face of the second annular protrusion 22a1 and the rear end face of the rear area male mold module 22 have a spacing, thereby making the rear end face of the second annular protrusion 22a1 inclined, so as to realize the formation of a rebound angle at the rear end of the rear area male mold module 22. In this embodiment, the inclination angle of the rear end face of the second annular protrusion is 0.5° to 1°.

[0037] Through the above arrangement, by setting the first annular protrusion 21a at the front end of the front zone male mold module 21 and arranging the front end surface of the first annular protrusion 21a at an angle, the compensatory rebound of the product end frame after the composite cabin is formed can be achieved to ensure the forming accuracy of the present invention.

[0038] Through the above arrangement, by setting a second annular protrusion 22a1 at the rear end of the rear zone male mold module 22 and arranging the rear end surface of the second annular protrusion 22a1 at an angle, compensatory rebound of the product end frame after the composite cabin is formed can be achieved to ensure the forming accuracy of the present invention.

[0039] like Figure 4 As shown, according to one embodiment of the present invention, the front end of the rear area male mold module 22 is provided with an annular positioning protrusion 22a. In this embodiment, the annular positioning protrusion 22a is connected to the inner edge of the front end of the rear area male mold module 22, and the annular positioning protrusion 22a is extended in a direction away from the front end of the rear area male mold module 22; wherein the composite mold 23 is sleeved on the outer side of the annular positioning protrusion 22a. In this embodiment, the annular positioning protrusion 22a on the rear area male mold module 22 can be formed based on the splicing of each rear area male mold assembly 221.

[0040] Through the above-mentioned arrangement, the rear zone male mold module 22 of the present invention can realize accurate positioning and installation with the core barrel unit 1 based on the annular positioning protrusion 22a, and can also realize accurate positioning and installation of the composite mold 23, thereby ensuring the accuracy of the structural dimensions of the composite material cabin based on the molding mold of the present invention.

[0041] Combination Figure 1 and Figure 4As shown, according to one embodiment of the present invention, the core barrel unit 1 includes: a front-zone core barrel module 11 and a rear-zone core barrel module 12 arranged coaxially; wherein the front-zone core barrel module 11 and the rear-zone core barrel module 12 are coaxially and detachably connected. In this embodiment, the front end of the rear-zone core barrel module 12 is provided with an annular connecting protrusion 12a, and the radial dimension of the annular connecting protrusion 12a is smaller than the radial dimension of the rear-zone core barrel module 12; wherein the annular connecting protrusion 12a is connected to abut against the rear end of the front-zone core barrel module 11; accordingly, the front-zone male mold module 21 is installed on the outside of the front-zone core barrel module 11, and the rear-zone male mold module 22 is installed on the outside of the rear-zone core barrel module 12. In this embodiment, the annular positioning protrusion 22a of the rear-zone male mold module 22 is nested and matched with the annular connecting protrusion 12a.

[0042] In this embodiment, the outer diameter of the annular connecting protrusion 12a is also smaller than the radial dimension of the rear end of the front area core barrel module 11. Therefore, when the front area core barrel module 11 and the rear area core barrel module 12 are docked, the annular positioning protrusion 22a can be clamped between the ends of the front area core barrel module 11 and the rear area core barrel module 12 to ensure the accurate installation and positioning of the rear area male mold module 22.

[0043] like Figure 2 As shown, according to one embodiment of the present invention, the female mold unit 3 includes: a plurality of female mold modules 31 and a fixed clamp 32; wherein the plurality of female mold modules 31 are spliced ​​with each other according to a preset rule and are sleeved on the outside of the male mold unit 2. In this embodiment, the fixed clamp 32 is sleeved on the outside of the female mold module 31 to fix the plurality of female mold modules 31; further, along the axial direction of the female mold unit 3, a plurality of fixed clamps 32 are provided.

[0044] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to one embodiment of the present invention, the front-end mounting unit 4 includes: a front-end support shaft assembly 41, a front-end cover 42, and a front-end flexible strain ring 43. In this embodiment, the front-end support shaft assembly 41 includes: a front-end support shaft body 411, and a front-end connecting plate body 412 coaxially arranged with the front-end support shaft body 411; wherein the front-end connecting plate body 412 is detachably connected to the front end of the front-zone core barrel module 11. In this embodiment, along the circumference of the front-end connecting plate body 412, a first connecting through hole is provided at a position close to the edge of the front-zone core barrel module 11, and correspondingly, a first threaded hole is provided at the front end of the front-zone core barrel module 11, thereby, the coaxial fixation of the front-end support shaft assembly 41 can be achieved by sequentially passing through the first connecting through hole and connecting with the first threaded hole through a threaded connector.

[0045] In this embodiment, the front end cover 42 is an annular end cover as a whole, and a first interlocking groove 421 and a second interlocking groove 422 are arranged on the rear side thereof; wherein, the first interlocking groove 421 and the second interlocking groove 422 are arranged coaxially. In this embodiment, the first interlocking groove 421 is interlocked and connected with the shape of the front end connecting plate body 412; and the hollow part of the front end cover 42 is provided for the front end support shaft body 411 to pass through. Further, the second interlocking groove 422 is an annular groove, and is interlocked and connected with the front end flexible strain ring 43; in this embodiment, the thickness of the front end flexible strain ring 43 is greater than the depth of the second interlocking groove 422; therefore, when the front end cover 42 is connected with the female mold unit 3, the front end flexible strain ring 43 can be abutted against the pre-laid end frame between the end of the male mold unit 2. Among them, the front end cover 42 is detachably connected to the front end of the female mold unit 3, and the front end flexible strain ring 43 is opposite to the front end of the male mold unit 2, so that an end frame is pre-laid between the front end flexible strain ring 43 and the front end of the male mold unit 2, thereby realizing a closed setting that abuts against each other; specifically, along the circumference of the front end cover 42, a first through hole is provided at a position close to the edge of the front end cover 42, and a threaded hole is provided at the front end of the female mold unit 3, thereby, a threaded connector can be used to pass through the first through hole to achieve connection with the front end threaded hole of the female mold unit 3, so as to fix the front end cover 42.

[0046] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the present invention, the rear-end mounting unit 5 includes: a rear-end support shaft assembly 51, a rear-end cover 52 and a rear-end flexible strain ring 53; in this embodiment, the rear-end support shaft assembly 51 includes: a rear-end support shaft body 511, and a rear-end connecting plate body 512 coaxially arranged with the rear-end support shaft body 511; wherein the rear-end connecting plate body 512 is detachably connected to the rear end of the rear-end core barrel module 12. In this embodiment, along the circumference of the rear-end connecting plate body 512, a second connecting through hole is arranged at a position close to the edge of the rear-end connecting plate body 512, and correspondingly, a second threaded hole is arranged at the rear end of the rear-end core barrel module 12, thereby, the coaxial fixation of the rear-end support shaft assembly 51 can be achieved by sequentially passing through the second connecting through hole and connecting with the second threaded hole through a threaded connector.

[0047] In this embodiment, the rear end cover 52 is an annular end cover as a whole, and a third interlocking groove 521 and a fourth interlocking groove 522 are arranged on the front side thereof; wherein, the third interlocking groove 521 and the fourth interlocking groove 522 are arranged coaxially. In this embodiment, the third interlocking groove 521 is interlocked and connected with the shape of the rear end connecting plate body 512; and the fourth interlocking groove 522 is an annular groove, and is interlocked and connected with the rear end flexible strain ring 53; in this embodiment, the thickness of the rear end flexible strain ring 53 is greater than the depth of the fourth interlocking groove 522; therefore, when the rear end cover 52 is connected with the female mold unit 3, the rear end flexible strain ring 53 can be abutted against the pre-laid end frame between the end of the male mold unit 2. Among them, the rear end cover 52 is detachably connected to the rear end of the female mold unit 3, and the rear end flexible strain ring 53 is opposite to the rear end of the male mold unit 2, so that an end frame is pre-laid between the rear end flexible strain ring 53 and the rear end of the male mold unit 2, thereby realizing a closed setting that abuts against each other; specifically, along the circumference of the rear end cover 52, a second through hole is provided at a position close to the edge of the rear end cover 52, and a threaded hole is provided at the rear end of the female mold unit 3, thereby, a threaded connector can be used to pass through the second through hole to achieve connection with the rear end threaded hole of the female mold unit 3, so as to fix the rear end cover 52.

[0048] like Figure 4 As shown, according to an embodiment of the present invention, the front flexible strain ring 43 and the rear flexible strain ring 53 are respectively made of expansion core pads; wherein the expansion core pad can be an Airpad expansion core pad. In this embodiment, the front flexible strain ring 43 and the front cover 42 are connected by adhesive; the rear flexible strain ring 53 and the rear cover 52 are connected by adhesive; wherein the adhesive used is GD414 single-component vulcanized silicone rubber, so as to achieve reliable and firm bonding position.

[0049] Through the above-mentioned setting, by setting the front flexible strain ring 43 and the rear flexible strain ring 53, it can play the main role of uniformly transmitting pressure and sealing the glue in the composite cabin molding mold. Through this structure, when the external pressure is transmitted to the end frame part of the composite cabin between the flexible strain ring and the male mold unit 2 through the pressure plate, the pressure transmission can be better achieved through the adaptive deformation of the material. At the same time, the material also has certain expansion characteristics, which can effectively ensure that the composite cabin end frame part is fully pressurized and reduce quality risks. In addition, the flexible strain ring can also effectively block the overflow of resin during the molding process, reduce the risk of glue shortage and ensure pressure stability.

[0050] According to one embodiment of the present invention, the composite mold 23 comprises: a first mold layer, a second mold layer and a third mold layer connected in sequence. In this embodiment, the composite mold 23 is obtained based on the following steps: S1. Preparing a first mold layer; The heat-expandable silicone rubber, the curing agent and the talcum powder are weighed in a mass ratio of 10:1:5.5, introduced into a stirring kettle and stirred for 10 to 15 minutes to obtain a first mixed material; The first mixed material is introduced into a degassing tank for vacuum degassing for 8 minutes to 10 minutes; The degassed first mixed material is poured according to a first preset thickness, and cured for 24 hours in an environment with a temperature of 22°C ± 4°C and a humidity of <55%, so as to obtain a first mold layer; S2. Preparing a second mold layer; The heat-expandable silicone rubber, the curing agent and the talcum powder are weighed in a mass ratio of 10:1:2.5, introduced into a stirring kettle and stirred for 10 to 15 minutes to obtain a second mixed material; The second mixed material is introduced into the degassing tank for vacuum degassing for 8 minutes to 10 minutes; The degassed second mixed material is poured on the first mold layer according to a second preset thickness, and cured for 24 hours in an environment with a temperature of 22°C ± 4°C and a humidity of <55% to obtain a second mold layer; S3. Preparing a third mold layer; The heat-expandable silicone rubber and the curing agent are weighed in a mass ratio of 10:1, introduced into a stirring kettle and stirred for 10 to 15 minutes to obtain a third mixed material; The third mixed material is introduced into the degassing tank for vacuum degassing for 8 minutes to 10 minutes; The degassed third mixed material is poured on the second mold layer according to the third preset thickness, and cured for 24 hours in an environment with a temperature of 22°C ± 4°C and a humidity of <55%, so as to obtain a third mold layer; S4. Trimming the composite mold layer based on a preset shape and a preset size to obtain a composite mold 23; in this embodiment, the thickness of the obtained composite mold 23 is 15 mm.

[0051] Through the above settings, the composite mold 23 prepared based on the above three steps will form a variable gradient composite elastic structure due to the difference in ratio, wherein the first mold layer closer to step S1 has a greater hardness of silicone, a relatively smaller deformation, better molding precision control, and at the same time has the advantages of silicone material, more uniform pressure transmission; the second mold layer closer to step S2 has a relatively average hardness and expansion rate, which is mainly used to adjust the expansion and transfer pressure; the mold layer closer to step S3 has a greater expansion rate of silicone, and the molding pressure is mainly provided by the thermal expansion of this part. Therefore, the composite mold 23 provided fully meets the corresponding molding needs and effectively guarantees the corresponding molding effect.

[0052] To further illustrate the present invention, the molding method of the present invention is further described.

[0053] Step 1: Prepare the composite mold 23; wherein the preparation steps are as described above and will not be repeated here. In this embodiment, the overall thickness of the composite mold 23 is 15 mm; wherein the first preset thickness of the first mold layer can be set to 3 mm, the second preset thickness of the second mold layer can be set to 5 mm, and the third preset thickness of the third mold layer can be set to 7 mm.

[0054] Step 2: Assembling the male mold unit 2 and the core barrel unit 1, and laying the carbon fiber layer in the composite cabin on the male mold unit 2. In this embodiment, the front area male mold module 21 uses 44 front area male mold components 211 and 1 window stop component 212; the rear area male mold module 22 uses 8 rear area male mold components 221; further, the front area male mold module 21 is installed on the front area core barrel module 11, and the rear area male mold module 22 is installed on the rear area core barrel module 12; further, the prepared composite mold 23 is sleeved with the annular positioning protrusion 22a and the composite mold 23 is bonded to the rear area male mold module 22 using GD414 single-component vulcanized silicone rubber. Further, the components that have been installed are treated with conventional mold release agents, and then the carbon fiber layers are laid on the left and right large ring ribs in the corresponding area. After the laying is completed, the rear area core barrel module 12 is aligned, positioned, assembled and fixed with the front area core barrel module 11 to complete the assembly of the mold laying body.

[0055] Step 3: The front end support shaft assembly 41 and the rear end support shaft assembly 51 are installed, wherein positioning pins and threaded connectors are used to achieve mutual positioning and fixation to facilitate the rotation operation function in a horizontal state.

[0056] Step 4: Carry out product process operation, and perform the laying and pre-pressing operations of the carbon fiber in each area in a horizontal state.

[0057] Step 5: Install the front end cover 42 and the front end flexible strain ring 43, wherein the Airpad expansion core pad with a specification of 5 mm is cut according to the shape and size of the second fitting groove 422 on the front end cover 42, and then GD414 single-component vulcanized silicone rubber is applied to the second fitting groove 422 of the front end cover 42 and bonded and fixed; The rear end cover 52 and the rear end flexible strain ring 53 are installed, wherein the Airpad expansion core pad with a specification of 5 mm is cut according to the shape and size of the fourth interlocking groove 522 on the rear end cover 52, and then GD414 single-component vulcanized silicone rubber is applied and bonded to the fourth interlocking groove 522 of the rear end cover 52.

[0058] Step 6: Close the mold and install the front cover 42, the rear cover 52 and multiple female mold modules 31 equipped with a flexible strain layer onto the combination of the core barrel unit 1 and the male mold unit 2. Each female mold module 31 needs to be fixed by a fixing hoop 32 to facilitate subsequent vacuum bag wrapping.

[0059] Step 7: Vacuum packing: the composite cabin molding mold that has been completed is covered with a vacuum bag and evacuated, and the vacuum pressure is maintained above 0.092MPa.

[0060] Step 8: Curing: Send the vacuum-coated composite cabin molding mold into an autoclave for heating and pressurizing curing.

[0061] Step 9: Demolding. After the composite cabin forming mold cools to room temperature, remove the vacuum bag covering the surface, and then remove the female mold unit 3, the front end installation unit 4, and the rear end installation unit 5 in turn, and place the remaining structure with the small end facing down and the large end facing up. Remove the rear area core barrel module 12 and the front area core barrel module 11 from the large end side, and then pull out the front area male mold assembly 211 and the rear area male mold assembly 221 layer by layer from top to bottom, and finally pull out the outlet limit assembly 212 inward to achieve near-net size molding of the composite cabin with an outlet frame and a number of large and small ribs.

[0062] The above contents are merely examples of specific solutions of the present invention. For devices and structures not described in detail therein, it should be understood that they can be implemented by adopting general devices and general methods available in the art.

[0063] The above is only one solution of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A composite cabin forming mold with a mouth frame and reinforcing ribs, characterized in that: include: A core barrel unit (1), a male mold unit (2) arranged outside the core barrel unit (1), a female mold unit (3) arranged outside the male mold unit (2), a front end mounting unit (4) and a rear end mounting unit (5); The male mold unit (2) comprises: a front-zone male mold module (21), a rear-zone male mold module (22) and a composite mold (23) which are coaxially arranged; The front-zone male mold module (21) and the rear-zone male mold module (22) are respectively detachably connected to the core barrel unit (1); The composite mold (23) is an annular structure; wherein the composite mold (23) is a variable gradient composite elastic plate made of talcum powder modified thermal expansion silicone rubber; The composite mold (23) is fixed between the front-zone male mold module (21) and the rear-zone male mold module (22), and an annular groove is formed between the front-zone male mold module (21), the composite mold (23) and the rear-zone male mold module (22).

2. The composite cabin forming mold according to claim 1, characterized in that: The front area male mold module (21) comprises: a plurality of front area male mold components (211) and a window stop component (212); The plurality of front-zone male mold assemblies (211) are respectively detachably connected to the core barrel unit (1), and the plurality of front-zone male mold assemblies (211) are arranged to be spliced ​​with each other according to a preset rule; The window stop assembly (212) and the front zone male mold assembly (211) are connected in a detachable manner; or, The plurality of front zone male mold assemblies (211) and the window stop assemblies (212) are respectively detachably connected to the core barrel unit (1), and the plurality of front zone male mold assemblies (211) and the window stop assemblies (212) are arranged to be spliced ​​with each other according to a preset rule.

3. The composite cabin forming mold according to claim 2, characterized in that: The rear-area male mold module (22) comprises: a plurality of rear-area male mold components (221); The plurality of rear-area male mold assemblies (221) are respectively detachably connected to the core barrel unit (1), and the plurality of rear-area male mold assemblies (221) are arranged to be spliced ​​with each other according to a preset rule.

4. The composite cabin forming mold according to claim 3, characterized in that: The front end surface of the front zone male mold module (21) is provided with a first annular protrusion; The rear end face of the first annular protrusion is arranged to overlap with the front end face of the front zone male mold module (21); The front end face of the first annular protrusion and the front end face of the front zone male mold module (21) are arranged at an angle, wherein the radial outer edge of the front end face of the first annular protrusion and the radial outer edge of the front end face of the front zone male mold module (21) are arranged to overlap, and the radial inner edge of the front end face of the first annular protrusion and the front end face of the front zone male mold module (21) are arranged to be spaced apart; The inclination angle of the front end surface of the first annular protrusion is 0.5° to 1°; The rear end surface of the rear zone male mold module (22) is provided with a second annular protrusion; The front end face of the second annular protrusion is arranged to overlap with the rear end face of the rear zone male mold module (22); The rear end face of the second annular protrusion and the rear end face of the rear zone male mold module (22) are arranged at an angle, wherein the radial outer edge of the rear end face of the second annular protrusion and the radial outer edge of the rear end face of the rear zone male mold module (22) are arranged to coincide with each other, and the radial inner edge of the rear end face of the second annular protrusion and the rear end face of the rear zone male mold module (22) are arranged to be spaced apart; The inclination angle of the rear end surface of the second annular protrusion is 0.5° to 1°.

5. The composite cabin forming mold according to claim 4, characterized in that: The front end of the rear zone male mold module (22) is provided with an annular positioning protrusion (22a); The annular positioning protrusion (22a) is connected to the inner edge of the front end of the rear-area male mold module (22), and the annular positioning protrusion (22a) is extended in a direction away from the front end of the rear-area male mold module (22); The composite mold (23) is sleeved on the outside of the annular positioning protrusion (22a).

6. The composite cabin forming mold according to claim 5, characterized in that: The core barrel unit (1) comprises: a front core barrel module (11) and a rear core barrel module (12) which are coaxially arranged; The front zone core barrel module (11) and the rear zone core barrel module (12) are coaxially and detachably connected; The front end of the rear core barrel module (12) is provided with an annular connection protrusion (12a), and the radial dimension of the annular connection protrusion (12a) is smaller than the radial dimension of the rear core barrel module (12); The annular connection protrusion (12a) is connected to the rear end of the front core barrel module (11) in abutment with each other; The front-zone male mold module (21) is installed on the outside of the front-zone core barrel module (11), and the rear-zone male mold module (22) is installed on the outside of the rear-zone core barrel module (12); The annular positioning protrusion (22a) of the rear zone male mold module (22) and the annular connecting protrusion (12a) are matched and nested with each other.

7. The composite cabin forming mold according to claim 6, characterized in that: The female mold unit (3) comprises: a plurality of female mold modules (31) and a fixed clamp (32); The plurality of female mold modules (31) are spliced ​​together according to a preset rule and sleeved on the outside of the male mold unit (2); The fixing hoop (32) is sleeved on the outside of the female mold module (31) and is used to fix the plurality of female mold modules (31); A plurality of fixed clamps (32) are provided along the axial direction of the female mold unit (3).

8. The composite cabin forming mold according to claim 7, characterized in that: The front end mounting unit (4) comprises: a front end support shaft assembly (41), a front end cover (42) and a front end flexible strain ring (43); The front end support shaft assembly (41) comprises: a front end support shaft body (411), and a front end connecting plate body (412) coaxially arranged with the front end support shaft body (411); The front end connecting plate body (412) is detachably connected to the front end of the front zone core barrel module (11); The front end cover (42) is an annular end cover as a whole, and a first fitting groove (421) and a second fitting groove (422) are provided on the rear side thereof; The first engaging groove (421) is engaged and connected with the front connecting plate body (412) in a shape matching with that of the front connecting plate body (412); The second engaging groove (422) is an annular groove, and is engaged and connected with the front flexible strain ring (43) in a matching manner; The thickness of the front flexible strain ring (43) is greater than the depth of the second fitting groove (422); The front end cover (42) is detachably connected to the front end of the female mold unit (3), and the front end flexible strain ring (43) is arranged opposite to the front end of the male mold unit (2); The rear end mounting unit (5) comprises: a rear end support shaft assembly (51), a rear end cover (52) and a rear end flexible strain ring (53); The rear end support shaft assembly (51) comprises: a rear end support shaft body (511), and a rear end connecting plate body (512) coaxially arranged with the rear end support shaft body (511); The rear end connecting plate body (512) is detachably connected to the rear end of the rear zone core barrel module (12); The rear end cover (52) is an annular end cover as a whole, and a third fitting groove (521) and a fourth fitting groove (522) are provided on the front side thereof; The third engaging groove (521) is engaged and connected with the rear end connecting plate body (512) in a shape matching with that of the rear end connecting plate body (512); The fourth engaging groove (522) is an annular groove, and is engaged and connected with the rear flexible strain ring (53) in a matching manner; The thickness of the rear end flexible strain ring (53) is greater than the depth of the fourth engaging groove (522); The rear end cover (52) is detachably connected to the rear end of the female mold unit (3), and the rear end flexible strain ring (53) is arranged opposite to the rear end of the male mold unit (2).

9. The composite cabin forming mold according to claim 8, characterized in that: The front flexible strain ring (43) and the rear flexible strain ring (53) are respectively made of expansion core pads; The front flexible strain ring (43) and the front cover (42) are connected with an adhesive; The rear end flexible strain ring (53) and the rear end cover (52) are connected by using an adhesive.

10. The composite cabin forming mold according to claim 9, characterized in that: The composite mold (23) comprises: a first mold layer, a second mold layer and a third mold layer which are connected in sequence; The composite mold (23) is obtained based on the following steps: S1. Preparing a first mold layer; The heat-expandable silicone rubber, the curing agent and the talcum powder are weighed in a mass ratio of 10:1:5.5, introduced into a stirring kettle and stirred for 10 to 15 minutes to obtain a first mixed material; The first mixed material is introduced into a degassing tank for vacuum degassing for 8 minutes to 10 minutes; The first mixed material after degassing is poured according to a first preset thickness, and cured for 24 hours in an environment with a temperature of 22°C ± 4°C and a humidity of <55%, so as to obtain the first mold layer; S2. Preparing a second mold layer; The heat-expandable silicone rubber, the curing agent and the talcum powder are weighed in a mass ratio of 10:1:2.5, introduced into a stirring kettle and stirred for 10 to 15 minutes to obtain a second mixed material; The second mixed material is introduced into a degassing tank for vacuum degassing for 8 minutes to 10 minutes; The second mixed material after degassing is poured on the first mold layer according to a second preset thickness, and cured for 24 hours in an environment with a temperature of 22°C ± 4°C and a humidity of <55%, so as to obtain the second mold layer; S3. Preparing a third mold layer; The heat-expandable silicone rubber and the curing agent are weighed in a mass ratio of 10:1, introduced into a stirring kettle and stirred for 10 to 15 minutes to obtain a third mixed material; The third mixed material is introduced into a degassing tank for vacuum degassing for 8 minutes to 10 minutes; The degassed third mixed material is poured onto the second mold layer according to a third preset thickness, and cured for 24 hours in an environment with a temperature of 22°C ± 4°C and a humidity of <55%, so as to obtain the third mold layer; S4. Trimming the composite mold layer based on a preset shape and a preset size to obtain the composite mold (23).

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