CN222681842U - A composite material ellipsoid shell production mold - Google Patents

Abstract

The utility model discloses a composite material ellipsoidal shell production mold in the field of mold technology, comprising: a forming mold, comprising an upper mold and a lower mold that are circular as a whole, the inner surfaces of the upper mold and the lower mold form a mold cavity after the upper mold and the lower mold are connected, and the inner surface cross-section is arc-shaped; a preforming mold, which is C-shaped as a whole, and its outer surface follows the shape of the inner surfaces of the upper mold and the lower mold. The mold structure of the utility model is simple and can ensure the surface finish of the product and the product contour tolerance. After trial use, the mold is easy to operate for layer laying, the product demoulding is easy to operate, and the product size accuracy requirement is effectively controlled.

Description

Composite material ellipsoidal shell production die

Technical Field

The utility model relates to the technical field of dies, in particular to a composite shell forming die.

Background

The streamline design concept is widely applied to airplanes, submarines, automobiles, ships and the like, and streamline is often influenced by factors such as the profile degree, the appearance quality, the internal quality, the mechanical property and the like of products, so that the application of the composite material is greatly restrained. The composite material part obtained by the autoclave method has excellent internal quality and appearance quality, and the mechanical property can be regulated by reinforcing fibers. The composite material is subjected to high temperature and high pressure in the forming process, and is easy to deform. The amount of deformation often needs to be controlled by mold compensation iterative design and layup design, increasing material costs and mold manufacturing costs.

The autoclave method is one of the common processes for molding composite materials, and is a method for curing and molding the prepreg under the action of certain temperature and pressure by utilizing the simultaneous action of high-temperature high-pressure gas on a mold and the prepreg. The products are molded by adopting a male die or a female die, and because the products are solidified at high temperature and demoulded at low temperature, and the expansion coefficients of a metal die and a composite material product are inconsistent, the products and the dies are difficult to separate for the products with complex shapes, and meanwhile, the ellipsoidal shell has a shape structure, and the paving difficulty is also higher.

Therefore, how to design a composite material forming die to ensure the requirements of the surface finish, the profile, the thickness and other dimensional accuracy of a formed product and the smooth demoulding is a subject to be studied by the technicians in the field.

Disclosure of utility model

Aiming at the defects in the prior art, the utility model provides a composite material ellipsoidal shell production die which solves the problems of inconvenient paving and difficult demoulding in the prior art.

The utility model aims to realize the production mould of the ellipsoidal shell of the composite material, which comprises the following components:

The forming die comprises an upper die and a lower die which are integrally round, wherein the inner surface of the upper die and the lower die after being in butt joint forms a die cavity, and the section of the inner surface is arc-shaped;

The pre-forming die is integrally C-shaped, and the outer surface of the pre-forming die is conformal with the inner surfaces of the upper die and the lower die.

As a further limitation of the utility model, the peripheral edge of the upper die is provided with an upper flanging, the peripheral edge of the lower die is provided with a lower flanging, and the upper flanging is connected with the lower flanging through bolts.

As a further limitation of the present utility model, the downward turned edge is in a right angle structure.

As a further limitation of the utility model, a hollowed-out design is adopted between the lower flanging and the lower die.

As a further limitation of the utility model, the upper flange is provided with an upper lifting lug.

As a further limitation of the utility model, the side surface of the turndown edge is provided with a lower lifting lug.

As a further limitation of the present utility model, the upper flange and the lower flange are also connected by a positioning pin.

As a further limitation of the present utility model, the upper flange is provided with a demolding hole.

As a further limitation of the present utility model, the upper edge of the upper die is provided with an upper top edge, and the lower edge of the lower die is provided with a lower bottom edge.

As a further definition of the utility model, the interior of the preform mold is hollow.

Compared with the prior art, the die has the beneficial effects that the die has a simple structure, can ensure the surface finish degree of a product and the contour tolerance of the product, and is easy to operate after trial application, and the requirements on the dimensional accuracy of the product are effectively controlled.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present utility model, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model.

Fig. 2 is a schematic structural view of a forming mold in the present utility model.

FIG. 3 is a schematic view of a preform mold according to the present utility model.

FIG. 4 is a schematic view of the lower die structure of the present utility model.

FIG. 5 is a cross-sectional view of a molding die according to the present utility model.

Fig. 6 is a schematic view of a housing structure made by the present utility model.

The forming die comprises a forming die 100, an upper die 101, a demolding hole 101a, an upper flanging 101b, an upper top edge 101c, a lower die 102, a hollow 102a, a reinforcing rib 102b, a lower flanging 102c, a lower bottom edge 102d, a 103 bolt, an upper lifting lug 104, a lower lifting lug 105, a die cavity 106, a 107 positioning pin and a pre-forming die 200.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Examples

A composite ellipsoidal shell production mold as shown in fig. 1-5, comprising:

The forming die 100 comprises an upper die 101 and a lower die 102 which are integrally round, wherein a die cavity 106 is formed on the inner surface of the upper die 101 and the lower die 102 after being in butt joint, the section of the inner surface is arc-shaped, an upper top edge 101c is arranged on the upper edge of the upper die 101, a lower bottom edge 102d is arranged on the lower edge of the lower die 102, and the upper top edge 101c and the lower bottom edge are both plane;

the preform mold 200 is C-shaped as a whole, and its outer surface follows the inner surfaces of the upper mold 101 and the lower mold 102.

Specifically, the upper die 101 and the lower die 102 are circular in shape, 45# steel (HRC 26-30) is selected during processing, the butt joint surface of the upper die 101 and the lower die 102 is a plane, the inner surface is an arc surface for smooth transition, the pre-forming die 200 is processed by hard aluminum, and the outer diameter of the pre-forming die 200 generally corresponds to the inner diameter of a product.

The working principle of the utility model is as follows:

The prepreg is firstly paved on the outer surface of the pre-forming die 200, is taken off from the pre-forming die 200 after pre-forming, is continuously paved in the forming die 100, and is then solidified to obtain the ellipsoidal shell shown in fig. 6.

Further, an upper flange 101b is provided on the outer periphery of the upper die 101, a lower flange 102c is provided on the outer periphery of the lower die 102, and the upper flange 101b is connected with the lower flange 102c through bolts 103.

Specifically, the upper flange 101b and the lower flange 102c are butted together in a fitting manner.

So designed, the assembly between the upper die 101 and the lower die 102 is facilitated.

Further, the lower flange 102c has a right angle structure.

It should be noted that the right angle configuration of the lower flange 102c provides a planar support to prevent the vacuum bag from breaking during curing of the prepreg.

Further, a hollow 102a is adopted between the lower flange 102c and the lower die 102.

Specifically, a plurality of reinforcing ribs 102b are further disposed in the hollow space 102 a.

The hollow 102a can reduce the weight of the lower die 102, and the reinforcing ribs 102b can ensure the overall strength of the lower die 102.

Further, an upper lifting lug 104 is provided on the upper flange 101 b.

Specifically, the number of the upper lifting lugs 104 is four, so that the lifting of the upper die 101 is facilitated.

Further, a lower lifting lug 105 is provided on the side of the lower flange 102 c.

Specifically, four lower lifting lugs 105 are also provided, which also facilitates the lifting of the lower die 102.

Further, the upper flange 101b and the lower flange 102c are further connected via a positioning pin 107.

Specifically, the upper flange 101b and the lower flange 102c are provided with matching positioning holes.

The positioning pin 107 is designed to facilitate the assembly of the upper die 101 and the lower die 102, and the positioning pin 107 is adopted for positioning and then the bolts 103 are used for fixing and assembling.

Further, the upper flange 101b is provided with a demolding hole 101a.

The design of the stripping aperture 101a facilitates the stripping of the mold, which, upon stripping,

Further, the inside of the preform mold 200 is a hollow structure.

Specifically, the pre-forming mold 200 is a shell structure, which can further save materials.

The die structure of the embodiment adopts female die molding, can realize the requirements of the outer surface and the outer dimension of a product, especially the contour degree of 0.05, has simple die structure, can ensure the finish degree of the outer surface of the product and the contour degree tolerance of the product, and is easy to operate after trial application of the die to perform layering operation, and the requirement of the product on the dimensional precision is effectively controlled.

The above description of the embodiments is only for aiding in the understanding of the method of the present utility model and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims (10)

1. A composite ellipsoidal shell production mold, comprising:

The forming die (100) comprises an upper die (101) and a lower die (102) which are integrally round, wherein a die cavity (106) is formed on the inner surface of the upper die (101) and the lower die (102) after being in butt joint, and the section of the inner surface is arc-shaped;

The preforming die (200) is integrally C-shaped, and the outer surface of the preforming die is conformal with the inner surfaces of the upper die (101) and the lower die (102).

2. The composite ellipsoidal shell production mold according to claim 1, wherein an upper flange (101 b) is provided on the outer periphery of the upper mold (101), a lower flange (102 c) is provided on the outer periphery of the lower mold (102), and the upper flange (101 b) and the lower flange (102 c) are connected by bolts (103).

3. A composite ellipsoidal shell production mould according to claim 2, wherein the lower flange (102 c) is of right angle configuration.

4. The composite ellipsoidal shell production mold according to claim 2, wherein a hollow (102 a) is adopted between the lower flange (102 c) and the lower mold (102).

5. A composite ellipsoidal shell production mould according to claim 2, wherein the upper flange (101 b) is provided with an upper lifting lug (104).

6. A composite ellipsoidal shell production mould according to claim 2, wherein the lower flange (102 c) is provided with a lower lifting lug (105) on its side.

7. A composite ellipsoidal shell production mould according to claim 2, wherein the upper flange (101 b) and the lower flange (102 c) are further connected by a positioning pin (107).

8. A composite ellipsoidal shell production mould according to claim 2, wherein the upper flange (101 b) is provided with a demolding hole (101 a).

9. A composite ellipsoidal shell production mould according to any of claims 1-7, wherein the upper edge of the upper mould (101) is provided with an upper top edge (101 c) and the lower edge of the lower mould (102) is provided with a lower bottom edge (102 d).

10. A composite ellipsoidal shell production mould according to any of claims 1-7, wherein the interior of the preform mould (200) is hollow.