Forming tool and forming method for heat insulation layer of composite cylinder

Abstract

The invention discloses a forming tool and a forming method for a heat insulation layer of a composite cylinder, and relates to the technical field of composite manufacturing. The forming tool comprises a base, a main forming die, an auxiliary forming plate, an upper die body and a vacuum bag; the main forming die is fixedly connected to the upper portion of the base and comprises a first forming die and a second forming die which are connected in a matched mode. The auxiliary forming plate is fixedly connected to the upper portion of the main forming die, and the auxiliary forming plate and the main forming die define a heat insulation layer cavity. The upper die body is coaxially matched with the heat insulation layer cavity, axially reciprocates in the heat insulation layer cavity and is provided with a compression molding surface matched with the inner wall of the heat insulation layer cavity; the vacuum bag is used for compacting the heat insulation part of a product and comprises a vacuum bag pressing face matched with the inner wall of a heat insulation layer cavity. The device and the method for preparing the composite material barrel have the advantages of being high in speed, low in cost, good in rigidity, easy to disassemble, good in maintainability and the like.

Description

Technical Field

[0001] The invention relates to the technical field of composite material manufacturing, and in particular to a composite material cylinder insulation layer molding tool and a molding method. Background Art

[0002] Carbon fiber composite materials have been widely used in many fields due to their light weight, high strength and simple structure, especially in aerospace, automotive industry, sports and leisure products.

[0003] However, in the prior art, there are still many problems in the molding process of the composite cylinder insulation layer, such as limited material adaptability; traditional tooling cannot meet the molding requirements of a variety of complex shapes, limiting the diversity and application scope of the product; molding accuracy is difficult to guarantee: due to the lack of effective tooling support and positioning, the composite cylinder insulation layer is prone to deformation and large dimensional deviation during the molding process, reducing the accuracy and consistency of the product and low production efficiency; complex molding processes and insulation layer measures increase production time and cost, limiting the ability of large-scale production.

[0004] Therefore, it is necessary to propose a more advanced and practical composite material cylinder insulation layer molding tool and molding method, aiming to overcome the limitations of existing technology through innovative design and technical means to meet the market demand for high-quality and high-precision composite material cylinders. Summary of the invention

[0005] The purpose of the present invention is to provide a composite material cylinder insulation layer molding tool and molding method to solve the problems of limited material adaptability, difficult to ensure molding accuracy and low production efficiency during molding of the composite material cylinder insulation layer.

[0006] To achieve the above-mentioned purpose, on the one hand, the present invention provides a composite material cylinder insulation layer forming tool, comprising:

[0007] Base;

[0008] A main molding die is fixedly connected to the base, and the main molding die includes two first molding dies and a second molding dies that are matched and connected;

[0009] An auxiliary molding plate is fixedly connected to the main molding die, and the auxiliary molding plate and the main molding die enclose a heat-insulating layer cavity;

[0010] An upper mold body is coaxially matched with the heat insulation layer cavity and axially reciprocates in the heat insulation layer cavity, and the upper mold body has a molding surface matched with the inner wall of the heat insulation layer cavity;

[0011] The vacuum bag is used to compact the insulation part of the product, and includes a vacuum bag pressing surface that cooperates with the inner wall of the insulation layer cavity.

[0012] As an optional method, the upper mold body is axially guided by the auxiliary molding plate and the main molding mold through multiple guide pillars. The guide pillars are fixed in the upper mold body and are slidably connected with the auxiliary molding plate and the main molding mold.

[0013] As an optional manner, three guide pillars are arranged along the circumference of the upper mold body.

[0014] As an optional manner, the upper mold body includes an end cap and a molding punch fixedly connected to the center of the bottom of the end cap, and the outer peripheral surface of the molding punch forms the molding surface.

[0015] As an optional method, the first molding die and the second molding die have the same structure and both include an annular body, the inner side surface of the annular body is a molding surface, the upper and lower ends of the annular body extend toward the outer circumference with an upper flange and a lower flange, and a plurality of radial support parts are supported between the upper flange and the lower flange.

[0016] As an optional manner, a connecting hole is opened on the radial support portion at the connecting position of the first molding die and the second molding die, and the connecting hole cooperates with bolts to realize the connection between the first molding die and the second molding die.

[0017] As an optional manner, the upper flanges of the first molding die and the second molding die are screwed to the auxiliary molding plate, and the lower flanges of the first molding die and the second molding die are screwed to the base.

[0018] As an optional manner, the upper mold body is connected to a hydraulic press, and is driven upward or downward by the hydraulic press.

[0019] In another aspect, the present invention provides a method for forming a composite material cylinder insulation layer, using any of the composite material cylinder insulation layer forming tooling described above, the forming method comprising the following steps:

[0020] Step S1, laying the thermal insulation material and using the upper mold body to mold the first part of the product;

[0021] Step S2, continue laying the insulation material and compact the second part of the product with a vacuum bag;

[0022] Step S3, heating and vulcanizing in a vacuum tank to complete the molding.

[0023] Compared with the prior art, the present invention at least discloses the following beneficial effects:

[0024] 1. The composite material cylinder insulation layer forming tooling of the present invention is made of metal materials and uses plates, nuts, bolts, etc. of standardized specifications and sizes, which reduces the processing cycle and manufacturing difficulty, and has the advantages of low cost, easy disassembly and good maintainability;

[0025] 2. The composite material cylinder insulation layer forming method of the present invention has simple process, fast production speed and low production cost. In particular, it can solve the problem that complex insulation forming tooling is difficult to form, and organically combines compression molding and vacuum bag molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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 will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is an axonometric view of the composite material cylinder insulation layer forming tooling of the present invention;

[0028] Figure 2 It is a front view of the molding tool of the present invention;

[0029] Figure 3 It is a right side view of the molding tool of the present invention;

[0030] Figure 4 A top view of the molding tool of the present invention;

[0031] Figure 5 Based Figure 4 Sectional view at AA in the middle;

[0032] Figure 6 It is an assembly diagram of the first mold body, guide pillars and auxiliary molding plates in the molding tool of the present invention;

[0033] Figure 7 For the present invention Figure 6 a top view of the assembly shown;

[0034] Figure 8 Based Figure 7 Sectional view at the middle BB;

[0035] Fig. 9 The axonometric measurement of the first mold body in the molding tool of the present invention Figure 1 ;

[0036] Fig.10 The axonometric measurement of the first mold body in the molding tool of the present invention Figure 2 ;

[0037] Fig.11 It is an axonometric view of the auxiliary forming plate in the forming tool of the present invention;

[0038] Fig.12 An exploded view of the main molding die in the molding tool of the present invention;

[0039] Fig.13 It is an assembly diagram of a base, a main forming mold and an auxiliary forming plate in the forming tooling of the present invention;

[0040] Fig.14 for Fig.13 a top view of the assembly shown;

[0041] Fig.15 for Fig.14 Sectional view at CC;

[0042] Fig.16 It is an assembly diagram of the base, the main molding die, the auxiliary molding plate, the molded product, and the vacuum bag molding product of the present invention;

[0043] Fig.17 for Fig.16 a top view of the assembly shown;

[0044] Fig.18 for Fig.17 Cross-sectional view at DD in the middle.

[0045] In the figure: 1. first mold body; 2. auxiliary molding plate; 3. main molding mold; 31. first molding mold; 32. second molding mold; 4. base; 5. bolt; 6. guide column; 7. molded product; 8. vacuum bag molding product; 9. vacuum bag pressing surface. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Aiming at the problems of limited material adaptability, difficult to ensure molding accuracy and low production efficiency during molding of existing composite cylinder insulation layers, the present invention aims to propose a composite cylinder insulation layer molding tool and molding method, which overcomes the limitations of the existing technology through innovative design and technical means to meet the market demand for high-quality and high-precision composite cylinders.

[0048] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0049] Reference Figures 1 to 5As shown, an embodiment of the present invention provides a composite material cylinder insulation layer molding tool, which is used for molding the composite material cylinder insulation layer. The molding tool includes a first mold body 1, a guide column 6, an auxiliary molding plate 2, a main molding mold 3, a base 4 and a plurality of fastening bolts 5 that cooperate with each other. The molding tool is detachably assembled from the above-mentioned multiple components and assembled using bolts 5. The parts can be replaced after they are worn to a certain extent, which can further extend the service life of the composite molding tool for the composite material cylinder insulation layer. The molding tool also includes a vacuum bag that cooperates with the insulation layer cavity enclosed by the main molding mold 3 and the auxiliary molding plate 2. The vacuum bag is used to compact the insulation part of the product, including a vacuum bag pressing surface 9 that cooperates with the inner wall of the insulation layer cavity. The design of the molding tool in this embodiment aims to achieve efficient molding of a complex insulation layer by combining compression molding and vacuum bag molding.

[0050] Specifically, Figures 6 to 8 As shown, the upper part of the forming tool is assembled by the first mold body 1, the guide pillar 6 and the auxiliary forming plate 2. The first mold body 1 and the auxiliary forming plate 2 are each provided with three guide holes corresponding to the position. The three guide holes are evenly distributed along the circumference of the first mold body 1 and the auxiliary forming plate 2, and the three guide pillars 6 pass through each guide hole. Specifically, the three guide holes on the first mold body 1 are T-shaped holes, and each guide pillar 6 is a T-shaped column body, one end of which has a stepped column on the annular protrusion, which is used to form an axial limit fit with the T-shaped guide hole, and the other end is set as a radially smoothly contracted conical end, which is convenient for insertion into the guide hole. The three guide pillars 6 have a positioning function for the first mold body 1 and the auxiliary forming plate 2, and can also ensure that they play a guiding role when the upper part of the forming tool is docked with the lower part.

[0051] Specifically, the main molding die 3 and the base 4 are fixedly connected to form the lower half of the molding tool. Figure 3 and Fig.12 As shown, the main molding die 3 is divided into two semicircular first molding die 31 and second molding die 32. The first molding die 31 and second molding die 32 are fastened together by transverse bolts 5. The first molding die 31 and second molding die 32 are fixedly connected to the base 4 by bolts 5, and are positioned by a cylindrical pin structure to ensure that the accuracy of the tooling after installation meets the product processing requirements. The main molding die 3 is fixedly connected to the base 4 to form the lower half of the molding tooling.

[0052] In the above embodiment, if Fig.12As shown, the cross section of the main molding die 3 is I-shaped, and the main molding die 3 includes an annular main body, the inner side of the annular main body is a molding surface, and the upper and lower ends of the annular main body extend horizontally to the outer peripheral side with an upper flange and a lower flange, and multiple radial support parts are supported between the upper flange and the lower flange. The upper flange is provided with multiple screw holes and 3 evenly distributed guide holes, and the guide holes cooperate with the guide column 6 to form a limit. The lower flange is provided with multiple screw holes for fastening and connecting with the base 4 through bolts 5. The main molding die 3 is divided into two semicircular first molding dies 31 and a second molding die 32, wherein a connecting hole is provided on the radial support part of the docking position of the first molding die 31 and the second molding die 32, and the bolt 5 passes through the connecting hole to fasten the two molding dies into one.

[0053] In the above embodiment, if Fig. 9 and Fig.10 As shown, the first mold body 1 includes an end cap and a molding convex mold fixed to the bottom of the end cap, the molding convex mold is a hollow cylindrical protrusion structure, and the molding convex mold cooperates with the heat-insulating layer cavity formed by assembling the base 4, the main molding mold 3, and the auxiliary molding plate 2 to achieve mold closing and mold the molded product 7. The outer peripheral surface of the molding convex mold forms a molding surface that cooperates with the inner side surface of the annular main body of the main molding mold 3, which is used for molding the molded product 7.

[0054] In the above embodiment, if Fig.11 As shown, the auxiliary molding plate 2 is a hollow disc-shaped structure with a certain thickness, whose upper surface cooperates with the first mold body 1, and the lower surface cooperates with the main molding mold 3. The auxiliary molding plate 2 is used to cooperate with the base 4 and the main molding mold 3 to form an insulation layer cavity, which plays a shaping role on the outer surface of the insulation layer.

[0055] like Figures 13 to 15 As shown, the heat insulation layer cavity is composed of a base 4, a forming block, and an auxiliary forming block, which plays a role in shaping the outer surface of the heat insulation layer.

[0056] like Figures 16 to 18 As shown, the thermal insulation layer of the product consists of two parts, namely product one: molded product 7, and product two: vacuum bag molded product 8. The molded product 7 is molded by the thermal insulation layer molding tool. First, the base 4, the main molding mold 3, and the auxiliary molding plate 2 are installed and fixed with bolts 5, and then the thermal insulation material is laid on the surface of the thermal insulation layer cavity according to the thickness of the product, and then the first mold body 1 of the tool is installed. Under the action of the hydraulic press, the first mold body 1 will be pressed downward along the direction of the guide column 6 to form a part of the product; the first mold body 1 of the tool is taken out, and the thermal insulation material of product two is continued to be laid on the basis of product one. After the laying is completed, the thermal insulation material of product two is compacted with the cooperation of the vacuum bag, and then the tool is pushed into the vacuum tank for heating and vulcanization. In this way, the molding of the complex thermal insulation layer can be completed under the premise of reducing the cost of the tool.

[0057] In some embodiments, the first mold body 1, the guide pillars 6, the auxiliary forming plate 2, the main forming mold 3, and the base 4 are all made of metal plates by machining and welding. During the processing, the metal plates are first cut according to the design drawings, and then welded and machined to form the required shape and size. The base 4, the main forming mold 3, and the auxiliary forming plate 2 are installed and fixed with bolts 5. The first mold body 1, the guide pillars 6, and the auxiliary forming plate 2 constitute the upper part of the tooling. The three guide pillars 6 are evenly distributed in the circumferential direction, which play a positioning role for the first mold body 1 and the auxiliary forming plate 2, and ensure the guiding role when the upper and lower parts of the forming tooling are connected.

[0058] In some embodiments, each component can be further made of national standard metal plates while ensuring strength, which can shorten the cycle and reduce costs; further, the tooling adopts a modular design, dividing the forming surface into modules of uniform size, which can greatly facilitate the later maintenance time and cost of the forming tooling. It is more preferred to adopt molding, vacuum bag forming and other processes, so that the insulation layer can be formed by the tooling and the insulation layer can be formed into complex shapes.

[0059] The molding tooling of the above-mentioned embodiment adopts a modular design and is fixed with screws, which is convenient for disassembly and replacement of worn parts and prolongs the service life. The tooling adopts a modular design, and the various parts are connected by bolts 5, which is convenient for disassembly and replacement. The main molding die 3 is divided into two halves, which are connected to the base 4 by bolts 5 and positioned by cylindrical pins to ensure that the accuracy of the tooling after installation meets the product requirements. The tooling adopts processes such as molding and vacuum bag molding, and can form an insulation layer of complex shape.

[0060] The working principle of the embodiment of the present invention is:

[0061] The forming plates are welded, corrected and machined into the insulation layer cavity, the base 4 and the cover plate, and then the base 4 and the insulation layer cavity are fixed in sequence by bolts 5, and then the insulation material is laid on the cavity according to the insulation size and shape, and then the cover plate is guided by the guide column 6, and the mold is closed under the action of the hydraulic press, the first part of the insulation layer is molded, and then the cover plate is taken out, and the subsequent insulation part of the sheet is laid, and then the vacuum bag is used to vacuum and compact the subsequent part of the sheet, and the vacuum is continued, and the mold is pushed into the vacuum tank, and the insulation sheet laid for the second time is heated and vulcanized. After the vulcanization is completed, the vacuum bag is removed first, and then the main molding mold 3 is taken out from both sides, and finally the product is taken out.

[0062] The embodiment of the present invention further provides a method for forming a composite material cylinder insulation layer, using the composite material cylinder insulation layer forming tool in the above embodiment, the forming method comprises the following steps:

[0063] Step S1, compression molding: according to the thickness of the product, the insulation material is laid on the surface of the insulation layer cavity; then the first mold body 1 is installed, and under the action of the hydraulic press, the first mold body 1 is pressed downward along the guide column 6 to form the first part of the product;

[0064] Step S2, vacuum bag forming: take out the first mold body 1 of the tooling, and continue to lay the insulation material of the second part of the product on the basis of the first part of the product; after the laying is completed, the insulation material of the second part of the product is compacted in cooperation with the vacuum bag;

[0065] Step S3, heating and vulcanization: pushing the tooling into a vacuum tank for heating and vulcanization to complete the molding of the complex insulation layer.

[0066] The composite material cylinder insulation layer forming tool and method disclosed in the embodiment of the present invention at least disclose the following beneficial effects compared with the prior art:

[0067] The molding tool and molding method of the present invention have fast production speed and low production cost, and are particularly suitable for the molding of complex insulation layers; the molding tool adopts plates with standardized specifications and sizes and standard nuts and bolts 5, which reduces the processing cycle and manufacturing difficulty; the molding tool has a simple overall structure and all parts can be disassembled for easy maintenance and repair; compared with the prior art, the tool and method of the present invention have obvious advantages in improving production efficiency, reducing costs and improving product quality.

[0068] The details not described in detail in the present invention are all conventional technical means well known to those skilled in the art.

[0069] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0070] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A composite material cylinder insulation layer forming tool, characterized in that: include: Base (4); A main molding die (3) is fixedly connected to the base (4), and the main molding die (3) comprises a first molding die (31) and a second molding die (32) which are matched and connected to each other; An auxiliary molding plate (2) is fixedly connected to the top of the main molding die (3), and the auxiliary molding plate (2) and the main molding die (3) enclose a heat-insulating layer cavity; An upper mold body is coaxially matched with the heat insulation layer cavity and axially reciprocates in the heat insulation layer cavity, and the upper mold body has a molding surface matched with the inner wall of the heat insulation layer cavity; The vacuum bag is used to compact the heat insulating part of the product, and comprises a vacuum bag pressing surface (9) which cooperates with the inner wall of the heat insulating layer cavity.

2. The composite material cylinder insulation layer forming tool according to claim 1, characterized in that: The upper mold body is axially guided by the auxiliary molding plate (2) and the main molding mold (3) through a plurality of guide pillars (6); the guide pillars (6) are fixed in the upper mold body and are slidably connected to the auxiliary molding plate (2) and the main molding mold (3).

3. The composite material cylinder insulation layer forming tool according to claim 2, characterized in that: Three guide pillars (6) are arranged along the circumference of the upper mold body.

4. The composite material cylinder insulation layer forming tool according to claim 1, characterized in that: The upper mold body includes an end cap and a forming convex mold fixedly connected to the center of the bottom of the end cap, and the outer peripheral surface of the forming convex mold forms the molding surface.

5. The composite material cylinder insulation layer forming tool according to claim 1, characterized in that: The first molding die (31) and the second molding die (32) have the same structure and both comprise an annular main body, the inner side surface of the annular main body being a molding surface, the upper and lower ends of the annular main body extending toward the outer circumference with an upper flange and a lower flange, and a plurality of radial support portions are supported between the upper flange and the lower flange.

6. The composite material cylinder insulation layer forming tool according to claim 5, characterized in that: A connecting hole is provided on the radial support portion at the position where the first molding die (31) and the second molding die (32) are connected, and the connecting hole cooperates with a bolt (5) to realize the connection between the first molding die (31) and the second molding die (32).

7. The composite material cylinder insulation layer forming tool according to claim 6, characterized in that: The upper flanges of the first molding die (31) and the second molding die (32) are screwed to the auxiliary molding plate (2), and the lower flanges of the first molding die (31) and the second molding die (32) are screwed to the base (4).

8. The composite material cylinder insulation layer forming tool according to claim 1, characterized in that: The upper mold body is connected to a hydraulic press and is driven upward or downward by the hydraulic press.

9. A method for molding a composite material cylinder insulation layer, using the composite material cylinder insulation layer molding tool according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step S1, laying the thermal insulation material and using the upper mold body to mold the first part of the product; Step S2, continue laying the insulation material and compact the second part of the product with a vacuum bag; Step S3, heating and vulcanizing in a vacuum tank to complete the molding.

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