Mould pressing device and fiber winding engine heat insulation shell

Abstract

The invention provides a mold pressing device and a fiber winding engine heat insulation shell. The mold pressing device comprises a lower mold and a male mold. The lower die comprises a supporting plate, a protruding part and a bearing part, the supporting plate is used for being attached to the top of a lower pressing plate of the forming equipment, and the protruding part is arranged at the top of the supporting plate; the bearing part is arranged at the top of the supporting plate, and the top of the bearing part is provided with an arc-shaped face part capable of being attached to one side of the fiber winding engine heat insulation shell. The male die comprises a flat plate part and a barrel part which are connected with each other, the flat plate part is used for being attached to the bottom of an upper pressing plate of forming equipment, and a forming space is formed between the outer wall of a barrel and the inner wall of the fiber-wound engine heat insulation shell and used for containing a heat insulation layer of the fiber-wound engine heat insulation shell. According to the mold pressing device, efficient and accurate forming of the heat insulation layer of the heat insulation shell of the fiber winding engine is achieved. And the production efficiency and the product quality are improved, the production cost and the operation difficulty are reduced, and remarkable technical advantages and market application value are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of engines, and in particular to a molding device and a fiber-wound engine heat-insulating shell. Background Art

[0002] The fiber-wound engine casing insulation layer is a kind of insulation material located between the inner wall of the engine casing and the propellant grain. The insulation layer consists of three parts: the front and rear head insulation layers and the casing barrel insulation layer. The existing technical solution is to first lay rubber on the core mold, then wrap and cure it; or to preform some rubber, combine them together by assembly, and then wrap and cure them.

[0003] Because the current technical solution requires that the rubber part be molded on the mold first, and then the winding can be carried out after the rubber part is molded. When molding the rubber part, the rubber at the front and rear sections usually needs to be pre-molded, and at least two sets of molds are required in this process. After molding the rubber at the front and rear sections, the rubber needs to be installed on the winding mold, and then the rubber at the middle section. During installation, if it is a large winding, it is often difficult to fit due to the problem of mold installation accuracy, resulting in problems with the mold surface and then scrapping; when the front and rear head positions are installed, the middle section of the rubber needs to be additionally paved, and each layer of rubber needs to be bonded with adhesive glue during the additional paving; after the glue bonding is completed, the rubber overlap position needs to be polished, and occasionally repairs are required after polishing. In summary, the molding of the rubber part requires the most manpower and the most molds in the entire winding molding process. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a molding device and a fiber-wound engine insulation casing to eliminate or improve one or more defects existing in the prior art.

[0005] The present invention provides a molding device, comprising a lower mold and a male mold;

[0006] The lower mold includes a support plate, a raised portion and a bearing portion, wherein the support plate is used to fit with the top of the lower pressure plate of the molding equipment, the raised portion is arranged on the top of the support plate, and the raised portion is used to block the through hole on one side of the heat-insulating shell of the fiber-wound engine; the bearing portion is arranged on the top of the support plate, and the top of the bearing portion has an arc-shaped surface portion that can fit with one side of the heat-insulating shell of the fiber-wound engine;

[0007] The male mold includes a flat plate portion and a cylindrical portion that are connected to each other, the flat plate portion is used to fit with the bottom of the upper pressure plate of the molding equipment, and the cylindrical portion can be inserted into the interior of the fiber-wound engine insulating shell. When the cylindrical portion is inserted into the interior of the fiber-wound engine insulating shell, a molding space is provided between the outer wall of the cylindrical portion and the inner wall of the fiber-wound engine insulating shell, which is used to accommodate the insulating layer of the fiber-wound engine insulating shell.

[0008] In one of the embodiments, the bearing portion includes a bearing bowl body, the arc-shaped surface portion is arranged on the bearing bowl body, and the bottom of the bearing bowl body is clamped with the support plate.

[0009] In one of the embodiments, the bottom of the supporting bowl body has a limiting groove, and the top of the supporting plate has a limiting protrusion, and the limiting protrusion is matched with the limiting groove.

[0010] In one of the embodiments, one end of the barrel portion away from the flat plate portion has an arc-shaped chamfered structure.

[0011] In one embodiment, the cylinder is a hollow structure.

[0012] The present invention also provides a fiber-wound engine insulation shell, which is made by the molding device, and the fiber-wound engine insulation shell comprises an outer shell and an insulation layer, and the insulation layer is arranged on the inner wall of the outer shell; the insulation layer is formed by extruding insulation raw material between the cylinder and the outer shell;

[0013] One side of the outer shell is provided with a through hole, and the through hole is matched with the raised portion; the side of the outer shell having the through hole is able to fit with the arc-shaped surface portion.

[0014] In one embodiment, an adhesive coating is provided between the outer shell and the thermal insulation layer.

[0015] In one embodiment, the outer shell is formed by winding a composite material.

[0016] A molding device and a fiber-wound engine insulation casing in an embodiment of the present invention have the following technical effects.

[0017] Additional advantages, purposes, and features of the present invention will be described in part in the following description, and will become apparent to those skilled in the art after studying the following, or may be learned from the practice of the present invention. The purposes and other advantages of the present invention may be achieved and obtained by the structures specifically indicated in the specification and the accompanying drawings.

[0018] Those skilled in the art will appreciate that the objectives and advantages that can be achieved with the present invention are not limited to the above specific description, and the above and other objectives that can be achieved by the present invention will be more clearly understood from the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention, constitute a part of this application, and do not constitute a limitation of the present invention. The components in the drawings are not drawn to scale, but are only for the purpose of illustrating the principles of the present invention. In order to facilitate the illustration and description of some parts of the present invention, the corresponding parts in the drawings may be enlarged, that is, they may become larger relative to other components in the exemplary device actually manufactured according to the present invention.

[0020] Figure 1 It is a schematic structural diagram of a pre-molding device for pressing heat-insulating raw materials and a heat-insulating casing of a fiber-wound engine in one embodiment of the present invention.

[0021] Figure 2 It is a schematic structural diagram of a post-molding device for insulating raw material pressing and an insulating casing of a fiber-wound engine in one embodiment of the present invention.

[0022] Figure 3 Schematic diagram of the structure of the outer shell in one embodiment of the present invention.

[0023] Figure numerals: 1. lower mold; 2. male mold; 3. support plate; 4. raised portion; 5. bearing portion; 6. flat plate portion; 7. cylinder portion; 8. outer shell; 9. insulation layer; 10. insulation raw material; 11. through hole; 12. lower pressure plate; 13. upper pressure plate. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments and the accompanying drawings. Here, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but are not intended to limit the present invention.

[0025] It should also be noted that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions according to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0026] It should be emphasized that the term “include / comprises” when used herein refers to the presence of features, elements, steps or components, but does not exclude the presence or addition of one or more other features, elements, steps or components.

[0027] It should also be noted that, unless otherwise specified, the term “connection” herein may refer not only to a direct connection but also to an indirect connection involving an intermediate.

[0028] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals represent the same or similar components, or the same or similar steps.

[0029] Reference Figure 1 and Figure 2 The embodiment of the present invention provides a molding device, including a lower mold 1 and a male mold 2; the lower mold 1 includes a support plate 3, a protrusion 4 and a bearing portion 5, the support plate 3 is used to fit with the top of the lower pressure plate 12 of the molding equipment, the protrusion 4 is arranged on the top of the support plate 3, and the protrusion 4 is used to block the through hole 11 on one side of the fiber-wound engine insulation shell; the bearing portion 5 is arranged on the top of the support plate 3, and the top of the bearing portion 5 has an arc-shaped surface that can fit with one side of the fiber-wound engine insulation shell; the male mold 2 includes a flat plate portion 6 and a cylindrical portion 7 connected to each other, the flat plate portion 6 is used to fit with the bottom of the upper pressure plate 13 of the molding equipment, the cylindrical portion 7 can be inserted into the interior of the fiber-wound engine insulation shell, and when the cylindrical portion 7 is inserted into the interior of the fiber-wound engine insulation shell, there is a molding space between the outer wall of the cylindrical body and the inner wall of the fiber-wound engine insulation shell, which is used to accommodate the insulation layer 9 of the fiber-wound engine insulation shell.

[0030] In the above embodiment, the support plate 3 fits tightly with the top of the lower pressing plate 12 of the molding equipment, providing a stable support foundation for the entire molding process, ensuring that the molding device will not affect the molding quality due to shaking or misalignment during molding. The raised portion 4 accurately blocks the through hole 11 on one side of the fiber-wound engine insulation shell, effectively preventing the material from leaking from the through hole during the molding process, and ensuring the integrity and closure of the molding area. The arc-shaped surface design of the bearing portion 5 enables it to fit tightly with one side of the fiber-wound engine insulation shell, and can provide uniform support regardless of how the shape or curvature of the shell changes, ensuring that the insulation layer can be evenly distributed during the molding process, and improving the overall quality and consistency of the finished product. When the barrel portion 7 is inserted into the interior of the fiber-wound engine insulation shell, the molding space formed between the outer wall of the barrel and the inner wall of the shell provides precise size control and a uniform stress environment for the molding of the insulation layer 9. This helps to reduce defects in the insulation layer during the molding process, such as bubbles, cracks, etc., thereby improving the overall performance and reliability of the insulation layer.

[0031] The molding device realizes efficient and precise molding of the thermal insulation layer of the fiber-wound engine thermal insulation shell, which not only improves production efficiency and product quality, but also reduces production costs and operating difficulties, and has significant technical advantages and market application value.

[0032] It should be noted that the injection molding thermal insulation lining method can be widely used in thermal insulation shells. Moreover, during the development stage, the inner surface state required by the product can be adjusted more conveniently by processing the outer shape of the mold. This is extremely convenient for adjusting the inner ballistics of the projectile.

[0033] In some embodiments, the bearing portion 5 includes a bearing bowl body, the arcuate surface is arranged on the bearing bowl body, and the bottom of the bearing bowl body is clamped with the support plate 3. The bearing portion 5 adopts a bearing bowl body design, and the arcuate surface thereon can closely fit one side of the fiber-wound engine insulation shell, which not only enhances the fit, but also improves the stability during the molding process.

[0034] In some embodiments, the bottom of the bearing bowl body has a limiting groove, and the top of the support plate 3 has a limiting protrusion, which is matched with the limiting groove. This clamping structure is not only easy to install, but also ensures the stability of the bearing bowl body during the molding process, and prevents molding quality problems caused by shaking or misalignment.

[0035] In some embodiments, the end of the barrel portion 7 away from the flat plate portion 6 has an arc-shaped chamfered structure. This design makes it smoother for the barrel portion 7 to be inserted into the fiber-wound engine insulation shell, reduces friction resistance, and reduces the risk of damage to the shell.

[0036] In some embodiments, the cylinder is a hollow structure. This not only reduces the overall weight of the molding device, but also helps to provide better heat conduction performance during the molding process, so that the insulation layer material can be heated and cured more evenly. At the same time, the hollow structure also facilitates the installation of a heating element or other auxiliary devices inside the cylinder to further control the temperature conditions during the molding process.

[0037] Reference Figures 1 to 3 An embodiment of the present invention provides a fiber-wound engine insulation shell, which is made by a molding device. The fiber-wound engine insulation shell includes an outer shell 8 and an insulation layer 9, and the insulation layer 9 is arranged on the inner wall of the outer shell 8; the insulation layer 9 is formed by extruding an insulation raw material 10 between a cylinder and the outer shell 8; one side of the outer shell 8 has a through hole 11, and the through hole 11 is adapted to the protrusion 4; the side of the outer shell 8 with the through hole 11 is in contact with the arc-shaped surface.

[0038] In the above embodiment, the fiber-wound engine insulation shell is composed of an outer shell 8 and an insulation layer 9, wherein the insulation layer 9 is arranged on the inner wall of the outer shell 8. This double-layer structure design effectively isolates the influence of external heat on the inside of the engine and improves the thermal insulation performance of the engine. In the prior art, the fiber-wound engine insulation shell is usually formed by splicing. The fiber-wound engine insulation shell of this embodiment has better integrity, and at the same time reduces the use of processes and molds. The fiber-wound engine insulation shell is manufactured by a molding device, which simplifies the production process and improves production efficiency. The compression molding technology can realize large-scale automated production and reduce production costs. The insulation layer 9 is formed by extruding the insulation raw material 10 between the cylinder and the outer shell 8, which ensures the uniformity and density of the insulation layer and further enhances its thermal insulation effect.

[0039] The filament-wound engine insulation casing provided by the embodiment of the present invention significantly improves insulation performance, adaptability, production efficiency, structural strength and durability by adopting double-layer structure design, precise molding technology, production process optimization and high-strength outer casing. These improvements not only improve the overall performance of the engine, but also reduce production and maintenance costs, and have broad application prospects and market value.

[0040] In some embodiments, there is an adhesive coating between the outer shell 8 and the heat insulating layer 9. The adhesive coating can be formed by spraying an adhesive.

[0041] In some embodiments, the outer shell 8 is wound from a composite material.

[0042] The method for producing a fiber-wound engine insulation casing by a molding device comprises the following steps:

[0043] 1. Wrap the composite material shell on the mold, cure and demould;

[0044] 2. Assemble the mold according to the traditional molding method, fill the inside with rubber raw material, and apply adhesive that matches the interface of the rubber composite material to the inside of the shell.

[0045] 3. Slowly pressurize the mold and wait for the mold temperature to rise to the required temperature. Finally, pressurize the rubber to form a rubber layer with the same size of the inner cavity.

[0046] Compared with the traditional technology of laying rubber on the core mold, the advantages are:

[0047] 1. The traditional method of laying rubber requires the rubber in the front and rear head areas to be molded in advance; this method can mold the rubber inside the shell in one go; and there is no need to purchase additional equipment. Presses are often more common in companies that produce related products, and there is no additional equipment cost.

[0048] 2. The traditional method of laying rubber requires assembling the front and rear heads, laying the barrel section, and grinding the barrel section. However, this method does not require grinding the rubber, and the composite interface may need surface treatment according to actual conditions.

[0049] 3. When the traditional method of laying rubber, the composite material and rubber interface are bonded, relying on the thermal expansion of the rubber and the tension of the fiber. However, this method uses a press to provide pressure, and the molding pressure can be adjusted in a wide range, which can greatly avoid the problem of interface debonding.

[0050] 4. In the traditional method of laying rubber, the composite material is partially cured and the rubber is vulcanized at the same time. If the curing and vulcanization temperatures of the material do not match, the material properties will be greatly affected. In this method, curing and vulcanization occur separately, and there is no problem of temperature mismatch.

[0051] 5. The longer the fiber wound engine insulation shell product, the larger the press required. The general height formula is as follows: 2×product height×1.5. Conventional molding has lower requirements for the press stroke.

[0052] The molding device and the fiber-wound engine insulation casing in the above implementation have the following advantages and technical effects:

[0053] 1. Due to the simplicity of the mold, this method has a high molding accuracy for the rubber lining and can be flexibly adjusted during the development stage without having to make a new mold, thus saving costs;

[0054] 2. The molds required for molding the rubber part in this way are simple and small in number, which saves costs;

[0055] 3. This method requires less vacuum auxiliary materials for molding the rubber part, saving costs;

[0056] 4. This method can avoid the problem of weak bonding between rubber and composite materials in traditional methods;

[0057] 5. This method has a longer mold service life;

[0058] 6. This molding method can prevent the composite material from exceeding the temperature resistance of rubber when it is cured at high temperature. Separate curing avoids this problem.

[0059] It should be clear that the present invention is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present invention is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present invention.

[0060] In the present invention, features described and / or illustrated for one embodiment may be used in the same or similar manner in one or more other embodiments, and / or combined with features of other embodiments or replace features of other embodiments.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the embodiments of 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 molding device, characterized in that: It comprises a lower mold (1) and a male mold (2); The lower mold (1) comprises a support plate (3), a raised portion (4) and a bearing portion (5); the support plate (3) is used to fit with the top of a lower pressure plate (12) of a molding device; the raised portion (4) is arranged on the top of the support plate (3); the raised portion (4) is used to block a through hole (11) on one side of a heat-insulating shell of a fiber-wound engine; the bearing portion (5) is arranged on the top of the support plate (3); the top of the bearing portion (5) has an arc-shaped surface that can fit with one side of a heat-insulating shell of a fiber-wound engine; The male mold (2) includes a flat plate portion (6) and a cylindrical portion (7) which are connected to each other. The flat plate portion (6) is used to fit with the bottom of the upper pressure plate (13) of the molding equipment. The cylindrical portion (7) can be inserted into the interior of the fiber-wound engine insulation shell. When the cylindrical portion (7) is inserted into the interior of the fiber-wound engine insulation shell, a molding space is provided between the outer wall of the cylindrical portion and the inner wall of the fiber-wound engine insulation shell, which is used to accommodate the insulation layer (9) of the fiber-wound engine insulation shell.

2. The molding device according to claim 1, characterized in that: The bearing portion (5) comprises a bearing bowl body, the arc-shaped surface portion is arranged on the bearing bowl body, and the bottom of the bearing bowl body is clamped with the support plate (3).

3. The molding device according to claim 2, characterized in that: The bottom of the bearing bowl body is provided with a limiting groove, and the top of the support plate (3) is provided with a limiting protrusion, and the limiting protrusion is adapted to the limiting groove.

4. The molding device according to claim 1, characterized in that: The cylindrical portion (7) has an arc-shaped chamfered structure at one end away from the flat plate portion (6).

5. The molding device according to claim 1, characterized in that: The cylinder is a hollow structure.

6. A fiber-wound engine insulation casing, made by the molding device according to any one of claims 1 to 5, characterized in that: The fiber-wound engine heat-insulating casing comprises an outer casing (8) and a heat-insulating layer (9), wherein the heat-insulating layer (9) is arranged on the inner wall of the outer casing (8); the heat-insulating layer (9) is formed by extruding heat-insulating raw material (10) between the cylinder and the outer casing (8); One side of the outer shell (8) has a through hole (11), and the through hole (11) is adapted to the raised portion (4); the side of the outer shell (8) having the through hole (11) is adapted to fit the arc-shaped surface portion.

7. The fiber-wound engine insulation casing according to claim 6, characterized in that: An adhesive coating is provided between the outer shell (8) and the heat insulating layer (9).

8. The fiber-wound engine insulation casing according to claim 6, characterized in that: The outer shell (8) is formed by winding a composite material.

Images