A U-shaped rotary body structure integrated forming die and manufacturing method

Abstract

The application discloses a U-shaped rotary body structure integrated forming die and belongs to the technical field of composite material manufacturing; components of the die include a bottom plate, a pressing plate assembly, a positioning block assembly and a top plate; wherein the pressing plate assembly die comprises a ring stop ring, a fixed whole ring and a wedge-shaped pressing block; the positioning block assembly comprises an inner ring block, an outer ring block and a central positioning block; the bottom plate, the pressing plate assembly, the positioning block assembly and the top plate are sequentially connected and assembled from bottom to top; and a forming die cavity of a product is formed. The application solves the high-precision profile requirement of the U-shaped rotary body, avoids the influence of mechanical processing on the performance of the product, and simultaneously adopts multiple solidification forming modes based on the characteristics of the die, so that the purpose of cost reduction and benefit increase is achieved.

Description

Technical Field

[0001] This invention belongs to the field of composite material manufacturing technology, and particularly relates to rotary molding molds and manufacturing methods. Background Technology

[0002] U-shaped rotating bodies made of composite materials are typically structures of a certain thickness consisting of inner and outer facades and a bottom surface. They are common internal support structures for cabins and cylinders, and are widely used in aircraft and aerospace vehicles, requiring high assembly precision. Compared to traditional U-shaped rotating metal structures, composite U-shaped rotating bodies are not only lightweight, high-strength, corrosion-resistant, and dimensionally stable, but also feature integrated molding. However, the common method of using a single male or female mold for integrated molding cannot fully guarantee the high-precision profile requirements of the installation facade. Secondary processing of the finished composite material is still necessary. Furthermore, traditional machining of the structural surface, due to uneven pressure, is prone to delamination and easily disrupts fiber continuity, directly affecting the mechanical properties of the structural components.

[0003] Secondly, using an integral rotary mold can lead to problems such as inconvenient demolding or damage to the finished product during demolding. Summary of the Invention

[0004] The purpose of this invention is to provide an integrated molding die and manufacturing method for a U-shaped rotating body structure, so as to solve the technical problem of achieving high precision requirements by integrally molding the rotating body in one step.

[0005] To solve the above-mentioned technical problems, the specific technical solution of the U-shaped rotating body structure integral molding mold and manufacturing method of the present invention is as follows: A U-shaped rotating body structure integrated molding die, the die components include a base plate, a pressure plate assembly, a positioning block assembly, and a top plate; wherein, the pressure plate assembly mold includes a retaining ring, a fixing ring, and a wedge-shaped pressure block; the positioning block assembly includes an inner ring block, an outer ring block, and a central positioning block; the base plate, pressure plate assembly, positioning block assembly, and top plate are connected and assembled sequentially from bottom to top to form the molding cavity of the product.

[0006] Furthermore, each mold component is a rotating body.

[0007] Furthermore, the mold components can be assembled from multiple pieces.

[0008] Furthermore, the outer ring is divided into multiple sections that are spliced ​​together to form a composite structure.

[0009] Furthermore, the inner ring is divided into multiple sections that are spliced ​​together to form a composite structure.

[0010] Furthermore, the retaining ring can be configured as a combination of multiple pieces spliced ​​together.

[0011] Furthermore, each mold is provided with a fastening hole for fastening with a mold assembly that is connected to it. The location of the hole is set according to the connection requirements and the convenience of processing.

[0012] Furthermore, the mold assembly is provided with a chamfer for overflowing resin-rich material.

[0013] This invention also provides a method for integrally molding a U-shaped rotating structure. S1; Clean the mold used and apply a release agent evenly to the molding mold; S2; After the base plate is connected and assembled with the ring retainer, prepreg is applied to the inner surface of the base plate and ring retainer assembly. S3; Connect the fixed center ring and positioning block to the ring retaining ring and the base plate respectively to limit the size of the paving material; S4; The outer ring blocks and inner ring blocks are distributed on the corresponding step surfaces of the fixed whole ring center and the positioning block; S5; Place the wedge-shaped pressure block between the outer ring segment and the inner ring segment, and finally place the top plate on top; or pre-assemble the wedge-shaped pressure block with the top plate, and then install the assembly with the outer ring segment and the inner ring segment in the manner described above. S6; Curing Product - Mold Step; S7; During the product demolding process, the pre-set anti-ejection holes of each mold can be used to demold; or a demolding puller can be used for demolding. S8; Finally, clean the burrs caused by the resin on the product edges and clean the mold.

[0014] Furthermore, the product-mold curing step can be selected; S61; When using an autoclave for curing, the product to be cured and the mold must be completely encapsulated and vacuumed; then transferred to the autoclave for curing. S62; When using a hot press for curing, the product to be cured and the mold must be transferred together to the press for curing. S63; When using an oven for curing, the product to be cured and the mold should be transferred to the oven as a whole. Before the prepreg gels, tighten the bolts or screws connecting the top plate and the wedge-shaped pressure block to achieve the purpose of pressure curing. The U-shaped rotating body structure integral molding mold and manufacturing method of the present invention have the following advantages: 1. The molded product has a smooth surface and the finished size is formed in one step, requiring only edge cleaning and no machining is needed.

[0015] 2. The process dimensions of the finished product are controlled by the mold used. Within a certain range of finished products, only the mold components that match the specific control interface need to be replaced to achieve the purpose of changing the shape.

[0016] 3. Using this mold to produce rotary finished products offers greater process adaptability. It can be used with hot presses, cold presses, molding, hot presses, ovens, and autoclaves for thermosetting, providing greater equipment selection and making it more suitable for small-batch products.

[0017] 4. Because the mold corresponding to the process control interface of the rotating body adopts a separable and multi-mold splicing scheme, the damage to the product caused by demolding is greatly reduced and the product precision is improved. Attached Figure Description

[0018] Figure 1 This is an exploded view of the mold assembly of the present invention; Figure 2 This is a top view of the assembly of the present invention and the positions of each cross section; Figure 3 This is a cross-sectional view of the assembly AA of the present invention; Figure 4 This is a cross-sectional view of the assembly of the present invention (CC section). Figure 5 This is a cross-sectional view of the assembly DD of the present invention; Figure 6 This is a cross-sectional view of the assembly EE of the present invention; Figure 7 This is a front view of the base plate of the present invention; Figure 8 This is a reverse view of the base plate of the present invention; Figure 9 This is a front view of the retaining ring of the present invention; Figure 10 This is a reverse view of the retaining ring of the present invention; Figure 11 This is a front view of the fixed ring of the present invention; Figure 12 This is a reverse view of the fixed full circle of the present invention; Figure 13 This is a front view of the central positioning block of the present invention; Figure 14 This is a reverse view of the central positioning block of the present invention; Figure 15 This is a front view of the outer ring blocks of the present invention; Figure 16 This is a reverse view of the outer ring blocks of the present invention; Figure 17 This is a front view of the inner ring blocks of the present invention; Figure 18 This is a reverse view of the inner ring segmentation of the present invention; Figure 19 This is a front view of the wedge-shaped pressure block of the present invention; Figure 20This is a reverse view of the wedge-shaped pressure block of the present invention; Figure 21 This is a front view of the top plate of the present invention; Figure 22 This is a reverse view of the top plate of the present invention; Figure 23 This is a schematic diagram of the finished product of the present invention; Figure 24 This is a diagram showing the assembly sequence of the mold used in this invention; The markings in the diagram are as follows: 1. Base plate, 2. Ring retaining ring, 3. Fixed ring, 4. Central positioning block, 5. Outer ring segment, 6. Inner ring segment, 7. Wedge-shaped pressure block, 8. Top plate, 9. Lifting screw, 10. Bolt or screw, 11. Molding cavity of the product. Detailed Implementation

[0019] To better understand the purpose, structure, and function of this invention, the following detailed description, in conjunction with the accompanying drawings, provides an integrated molding die and manufacturing method for a U-shaped rotating structure.

[0020] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0021] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0024] In addition, numerous specific details are provided in the following detailed embodiments to better illustrate this application.

[0025] Those skilled in the art will understand that this application can be practiced even without certain specific details. In some instances, methods, means, components, and circuits well known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0026] For details on the shape and fit of each mold, please refer to Figures 1 to 24 The invention will now be described in detail with reference to the accompanying drawings.

[0027] This invention provides an integrated molding die for a U-shaped rotating structure, comprising a base plate 1, a pressure plate assembly (2, 3, 7), a positioning block assembly (4, 5, 6), and a top plate 8. The pressure plate assembly includes a retaining ring 2, a fixing ring 3, and a wedge-shaped pressure block 7. The positioning block assembly includes an inner ring block 6, an outer ring block 5, and a central positioning block 4. The base plate 1, pressure plate assembly, positioning block assembly, and top plate 8 are sequentially connected and assembled from bottom to top. Each die has fastening holes for mating with and connecting die components; the specific locations of these holes can be adjusted according to connection requirements and processing convenience.

[0028] Specifically, the outer ring of the upper profile of the base plate 1 and the lower stepped surface of the retaining ring 2, and the upper profile of the central protrusion of the plate 1 and the lower profile of the central positioning block 4 are aligned and connected by screws or bolts. The lower stepped surface of the fixed ring 3 is aligned and connected to the upper stepped surface of the retaining ring 2. The stepped surface of the outer ring segment 5 is aligned and connected to the upper stepped surface of the fixed ring 3. The stepped surface of the inner ring segment 6 is aligned and connected to the upper stepped surface of the central positioning block 4. The stepped surface of the outer ring segment 5 is aligned and connected to the upper stepped surface of the fixed ring 3. After the top plate 8 and the wedge-shaped pressure block 7 are aligned with the same center, the wedge-shaped pressure block 7 is attached to the vertical surfaces of the inner ring segment 6 and the outer ring segment 5 respectively. The top plate 8 is attached to the planes of the inner ring segment 6 and the outer ring segment 5.

[0029] All molds are pre-designed using 3D modeling to determine the forming dimensions and limit the dimensions of the processed molds to ensure that the assembled surfaces are flat and seamlessly connected, meeting the process requirements.

[0030] To further ensure the accuracy of the assembly, each mold is installed once and then calibrated using a three-dimensional scanning measurement device to ensure that the final mold assembly meets the processing requirements.

[0031] The base plate 1 is a rotary body with a "convex" characteristic structure, serving as the foundation for the assembly of the entire mold. It forms a product operation mold cavity with the ring retainer 2 through mounting and fixing bolts or screws, and serves as the control surface for the outer dimension surface of the rotary body product; the ring retainer 2 is used to ensure the molding of the circular surface of the product's outer ring, and forms the product operation mold cavity together with the base plate. The ring retainer can be provided as a combined body formed by splicing a plurality of blocks, preferably 2 blocks The fixed full ring 3 and the central positioning block 4 ensure the molding of the circular upper end surfaces of the inner and outer rings of the product.

[0032] The outer ring split blocks 5 can be provided as a combined body formed by splicing a plurality of blocks, preferably 4-6 blocks.

[0033] The inner ring split blocks 6 can be provided as a combined body formed by splicing a plurality of blocks, preferably 3 blocks.

[0034] The inner ring split blocks and the outer ring split blocks are used to ensure the molding of the circular vertical side surfaces of the inner and outer rings of the rotary body.

[0035] The outer ring split blocks, the inner ring split blocks and the wedge-shaped pressing block are installed in cooperation to form a product molding cavity and a molding surface for the inner bottom surface of the product.

[0036] The combined body of the outer ring split blocks is a rotary body with an inverted L-shaped cross section, and the inner surface thereof can be in seamless fit with the outer surface of the wedge-shaped pressing block.

[0037] The combined body of the inner ring split blocks is a rotary body with an inverted L-shaped cross section, and the outer surface thereof can be in seamless fit with the inner surface of the wedge-shaped pressing block.

[0038] The base plate 1, the ring retainer 2, the fixed full ring 3, the central positioning block 4, the outer ring split blocks 5, the inner ring split blocks 6, and the wedge-shaped pressing block 7 are assembled in cooperation to form a molding cavity 11 of the product; At the same time, lifting screws 9 are installed on the outer side of the base plate to facilitate mold lifting and handling.

[0039] The bottom of the top plate 8 is provided with a groove that fits the upper end surface of the wedge-shaped pressing block 7, and the wedge-shaped pressing block 7 and the top plate 8 are fixedly connected by bolts or screws.

[0040] After the mold surface on the mold base plate 1 and the ring retainer 2 are connected and assembled, the subsequent modules need to be assembled and connected after the product layering is completed. During the preparation process of the product in the hot pressing tank and hot press, the top plate 8 and the wedge-shaped pressing block 7 are matched at the same center, then the wedge-shaped pressing block 7 is attached to the vertical surfaces of the inner ring split blocks 6 and the outer ring split blocks 5 respectively; the top plate 8 is attached to the flat surfaces of the inner ring split blocks 6 and the outer ring split blocks 5.

[0041] The base plate 1, the baffle plate assembly (2, 3, 7), the positioning split block assembly (4, 5, 6), and the top plate 8 are all manufactured by numerical control machining of 45# steel.

[0042] Fixing bolts or screws 10-1 are used to connect the base plate 1, the retaining ring 2, the fixing ring 3, and the top plate 8; 10-2 fixing bolts or screws are used to connect the base plate 1 and the retaining ring 2; 10-3 fixing bolts or screws are used to connect the retaining ring 2 and fix the entire ring 3; 10-4 fixing bolts or screws are used to connect the base plate 1 and the central positioning block 4; 10-5 fixing bolts or screws are used to connect the base plate 1, the central positioning block 4, and the top plate 8; Fixing bolts or screws 10-6 are used to connect the wedge-shaped pressure block 7 and the top plate 8.

[0043] Except for bolts or screws used to connect to the top plate 8, which can extend beyond the end face of the mold 8, all other screws or bolt heads must be submerged within the end face of the mold to prevent interference with the connection or fit of other molds.

[0044] When using the thermosetting curing process, it is not necessary to connect fixing bolts or screws; alternatively, some internal mold components can be selectively connected.

[0045] If, during processing, it is not necessary to precisely control the amount of impregnation used for ease of operation, a chamfer can be designed at the connection of one or more molds to allow for the overflow of resin-rich material.

[0046] For example, the chamfering of the ring line at the junction of the inner surface of the retaining ring 2 used for product molding and the upper surface that contacts the fixed ring 3 is used to facilitate the overflow of resin-rich material, which will greatly reduce the difficulty for operators to control the resin-rich material.

[0047] For example, the chamfer can be made at the junction of the upper end face of the base plate 1 used to connect with the positioning block 4 and the vertical surface of the middle protrusion of the base plate 1 used for product molding, so as to facilitate the overflow of resin-rich material and greatly reduce the difficulty for operators to control the resin-rich material.

[0048] The present invention also provides a method for integral molding and manufacturing a U-shaped rotating structure, the specific steps of which are as follows: S1; Clean the mold used and apply a release agent evenly to the molding mold; S2; After the upper surface of the base plate 1 is connected and assembled with the ring retainer 2, the prepreg is laid on the inner surface of the assembly of the base plate 1 and the ring retainer 2. S3; Connect the center of the fixed ring 3 and the positioning block 4 to the ring retaining ring 2 and the base plate 1 respectively to limit the size of the paving material.

[0049] S4; the outer ring segment 5 and the inner ring segment 6 are distributed on the corresponding step surfaces of the fixed ring 3 and the positioning block 4. S5; Place the wedge-shaped pressure block 7 between the outer ring block 5 and the inner ring block 6, and finally place the top plate 8 on top; or pre-assemble the wedge-shaped pressure block 7 and the top plate 8, and then install the assembly with the outer ring block 5 and the inner ring block 6 in the manner described above.

[0050] S61; When using an autoclave for curing, the product to be cured and the mold must be completely encapsulated and vacuumed; then transferred to the autoclave for curing. S62; When using a hot press for curing, the product to be cured and the mold must be transferred together to the press for curing. S63; When using an oven for curing, the product to be cured and the mold should be transferred to the oven as a whole. Before the prepreg gels, tighten the bolts or screws connecting the top plate 8 and the wedge-shaped pressure block 7 to achieve the purpose of pressure curing. S7; During the product demolding process, the pre-set anti-ejection holes of each mold can be used to demold; or a demolding puller can be used for demolding. S8; Finally, clean the burrs caused by the resin on the product edges and clean the mold.

[0051] Based on the shortcomings of existing technologies, this invention provides an integrated molding mold and manufacturing method for a U-shaped rotating body structure, which solves the high-precision surface requirements of the U-shaped rotating body, avoids the impact of machining on product performance, and, based on the mold features, can adopt a variety of curing and molding methods, thereby achieving the goal of cost reduction and efficiency improvement.

[0052] 1. The molded product has a smooth surface and the finished size is formed in one step, requiring only edge cleaning and no machining is needed.

[0053] 2. The process dimensions of the finished product are controlled by the mold used. Within a certain range of finished products, only the mold components that match the specific control interface need to be replaced to achieve the purpose of changing the shape.

[0054] 3. Using this mold to produce rotary finished products offers greater process adaptability. It can be used with hot presses, cold presses, molding, hot presses, ovens, and autoclaves for thermosetting, providing greater equipment selection and making it more suitable for small-batch products.

[0055] 4. Because the mold corresponding to the process control interface of the rotating body adopts a separable and multi-mold splicing scheme, the damage to the product caused by demolding is greatly reduced and the product precision is improved.

[0056] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A U-shaped rotating body structure integral molding mold, characterized in that, The mold components include a base plate (1), a pressure plate assembly, a positioning block assembly, and a top plate (8); wherein, the pressure plate assembly mold includes a retaining ring (2), a fixed ring (3), and a wedge-shaped pressure block (7); the positioning block assembly includes an inner ring block (6), an outer ring block (5), and a central positioning block (4); the base plate (1), pressure plate assembly, positioning block assembly, and top plate (8) are connected and assembled sequentially from bottom to top to form the molding cavity (11) of the product; the outer ring of the upper surface of the base plate (1) and the lower step surface of the retaining ring (2) are fixedly connected by screws or bolts, and the upper surface of the central protrusion of the base plate (1) and the lower surface of the central positioning block (4) are aligned and fixed by screws or bolts. The fixed ring (3) is connected to the lower stepped surface of the fixed ring (2) with the upper stepped surface of the ring retaining ring (2). The outer ring segment (5) stepped surface is connected to the upper stepped surface of the fixed ring (3) with a tight fit. The inner ring segment (6) stepped surface is connected to the upper stepped surface of the central positioning block (4) with a tight fit. The outer ring segment (5) stepped surface is connected to the upper stepped surface of the fixed ring (3) with a tight fit. The top plate (8) and the wedge-shaped pressure block (7) are connected with the same center with a tight fit. The wedge-shaped pressure block (7) is connected to the vertical surfaces of the inner ring segment (6) and the outer ring segment (5) respectively with a tight fit. The top plate (8) is connected to the plane of the inner ring segment (6) and the outer ring segment (5).

2. The U-shaped rotating body structure integral molding mold according to claim 1, characterized in that, Each mold component is a rotating body.

3. The U-shaped rotating body structure integral molding mold according to claim 1, characterized in that, The mold assembly is a combination of multiple pieces assembled together.

4. The U-shaped rotating body structure integral molding mold according to any one of claims 1-3, characterized in that, The outer ring is divided into blocks (5) and is set as a combination of multiple blocks spliced ​​together.

5. The U-shaped rotating body structure integral molding mold according to any one of claims 1-3, characterized in that, The inner ring is divided into blocks (6) and is configured as a combination of multiple blocks spliced ​​together.

6. The U-shaped rotating body structure integral molding mold according to any one of claims 1-3, characterized in that, The ring retainer (2) is set as a combination of multiple pieces spliced ​​together.

7. The U-shaped rotating body structure integral molding mold according to any one of claims 1-3, characterized in that, Each mold is equipped with fastening holes for connecting and fastening mold components. The location of these holes is determined based on the connection requirements and ease of processing.

8. The U-shaped rotating body structure integral molding mold according to any one of claims 1-3, characterized in that, The mold assembly is provided with a chamfer for overflowing rich resin.

9. A method for integrally molding a U-shaped rotating body structure, applied to the integral molding mold for the U-shaped rotating body structure as described in any one of claims 1-8, characterized in that, S1; Clean the mold used and apply a release agent evenly to the molding mold; S2; After the upper surface of the base plate (1) is connected and assembled with the ring retainer (2), the prepreg is laid on the inner surface of the combination of the base plate (1) and the ring retainer (2); S3; Connect the center of the fixed ring (3) and the positioning block (4) to the ring retaining ring (2) and the base plate (1) respectively to limit the size of the paving material; S4; the outer ring block (5) and the inner ring block (6) are distributed on the corresponding step surfaces of the center of the fixed whole ring (3) and the positioning block (4); S5; Place the wedge-shaped pressure block (7) between the outer ring block (5) and the inner ring block (6), and finally place the top plate (8); or pre-assemble the wedge-shaped pressure block (7) and the top plate (8), and then install the assembly with the outer ring block (5) and the inner ring block (6) in the manner described above; S6; Curing Product - Mold Step; S7; During the product demolding process, the mold is removed by using pre-set anti-ejection holes in each mold; or a demolding tool is used for demolding. S8; Finally, clean the burrs caused by the resin on the product edges and clean the mold.

10. The method for integrally molding and manufacturing a U-shaped rotating structure according to claim 9, characterized in that, The curing product-mold process is one of steps S61, S62, or S63. S61; When using an autoclave for curing, the product to be cured and the mold must be completely encapsulated and vacuumed; then transferred to the autoclave for curing. S62; When using a hot press for curing, the product to be cured and the mold must be transferred together to the press for curing. S63; When using an oven for curing, the product to be cured and the mold should be transferred to the oven as a whole. Before the prepreg gels, tighten the bolts or screws connecting the top plate (8) and the wedge-shaped pressure block (7) to achieve the purpose of pressure curing.

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