Forming die for thin-wall special-shaped composite material protective cover

Abstract

The utility model discloses a forming die for a thin-wall special-shaped composite material protection cover, and belongs to the technical field of composite material forming. The problems that an existing thin-wall special-shaped composite material protection cover is low in production efficiency, and a complex molded surface is difficult to form are solved. The first forming area is arranged at the top of the lower die, a first step and a second step are arranged at the two ends of the top of the lower die respectively, the second forming area is arranged at the bottom of the upper die, and a third step corresponding to the first step and a fourth step corresponding to the second step are arranged at the two ends of the bottom of the upper die respectively. The second forming area is buckled above the first forming area, the third step is in lap joint with the corresponding first step, the fourth step is in lap joint with the corresponding second step, and the upper die and the lower die are fixedly connected through bolts. Through cooperation of the upper die and the lower die, integrated laying forming of the thin-wall special-shaped composite material protection cover is achieved, and the forming precision and the structural integrity of the complex curved surface of the thin-wall special-shaped composite material protection cover are ensured.

Description

Technical Field

[0001] This utility model relates to a molding die for a thin-walled irregular composite material protective cover, belonging to the field of composite material molding technology. Background Technology

[0002] Composite material protective covers are widely used on the outer walls of aerospace components. On one hand, they prevent environmental influences and interference with the working state of internal precision components such as sensors, improving their reliability and ensuring all-weather operation. On the other hand, they maintain structural integrity and good wave transmission performance in harsh working environments such as raindrop impacts and loading. However, because these composite material protective covers are integrally laid-out molded covers with multiple curved and irregularly shaped surfaces to match complex protective curves, existing thin-walled irregularly shaped composite material protective covers suffer from low production efficiency and difficulties in molding complex surfaces. Utility Model Content

[0003] The present invention aims to solve the above-mentioned problems and provides a molding die for a thin-walled irregular composite material protective cover.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0005] A molding die for a thin-walled, irregularly shaped composite material protective cover includes an upper die and a lower die. The upper die has multiple first ejector bolt holes at both ends. The lower die includes a first molding area, a first step, and a second step. The first molding area is located at the top of the lower die. The longitudinal section of the first molding area is an arc-shaped protrusion. One end of the arc-shaped protrusion smoothly transitions to a first inclined surface with the first step, and the other end smoothly transitions to a second inclined surface with the second step. A first step and a second step are provided at each end of the top of the lower die. The first step includes a first step platform and a second step platform, and the second step includes a third step platform and a fourth step platform. The lower end of the first inclined surface... The lower end of the second inclined surface is lower than the first stepped platform, and the lower end of the second inclined surface is lower than the third stepped platform. The upper mold includes a second forming area, a third step, and a fourth step. The second forming area is located at the bottom of the upper mold. The longitudinal section of the second forming area is an arc-shaped groove. The two ends of the arc-shaped groove smoothly transition into a third inclined surface corresponding to the first inclined surface and a fourth inclined surface corresponding to the second inclined surface, respectively. The two ends of the bottom of the upper mold are each provided with a third step corresponding to the first step and a fourth step corresponding to the second step. The second forming area is fastened above the first forming area. The third step overlaps on the corresponding first step, and the fourth step overlaps on the corresponding second step. The upper mold and the lower mold are fixed together by bolts.

[0006] Furthermore, ribs are provided on both sides of the upper and lower molds, and multiple first fastening bolt holes are provided on the ribs.

[0007] Furthermore, the ribs on both sides of the upper and lower molds are fixedly connected to the side plates, and the two side plates are provided with second fastening bolt holes corresponding to the first fastening bolt holes. The side plates are provided with grooves near the position between the first forming area and the second forming area.

[0008] Furthermore, multiple third fastening bolt holes are opened at both ends of the upper mold, and fourth fastening bolt holes corresponding to the third fastening bolt holes are opened at both ends of the lower mold. Each third fastening bolt hole and the corresponding fourth fastening bolt hole are fixed together by bolts.

[0009] Furthermore, multiple second ejector bolt holes are respectively provided on the side plate.

[0010] Furthermore, each of the first ejector bolt holes and the second ejector bolt hole is threaded with an ejector bolt.

[0011] Furthermore, the upper and lower molds are positioned by tapered pins.

[0012] Furthermore, the upper mold and the two side plates are positioned by cylindrical pins.

[0013] Furthermore, the upper mold, lower mold, and two side plates are all made of metal.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] This invention forms the convex surface of a thin-walled irregular composite material protective cover using an upper mold and the concave surface using a lower mold. The second forming area of ​​the upper mold is fastened above the first forming area of ​​the lower mold. Since the lower end of the first inclined surface is lower than the first stepped platform and the lower end of the second inclined surface is lower than the third stepped platform, a forming gap is formed. The thickness of the forming gap is limited by the thickness of the thin-walled irregular composite material protective cover. The upper and lower molds are initially positioned by overlapping the second and first stepped platforms, facilitating subsequent fixing. The upper and lower molds are fixed with bolts to apply a pre-tightening force during mold closing, causing the upper and lower molds to abut against each other. After forming, the upper and lower molds are demolded by tightening the ejector bolts in the first ejector bolt holes. The cooperation of the upper and lower molds achieves the integral laying and forming of the thin-walled irregular composite material protective cover, ensuring the forming accuracy and structural integrity of the complex curved surface of the thin-walled irregular composite material protective cover, and greatly improving production efficiency and accuracy. Attached Figure Description

[0016] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0017] Figure 1 A three-dimensional structural diagram of the molding die for a thin-walled, irregularly shaped composite material protective cover;

[0018] Figure 2 A cross-sectional view of the molding die for a thin-walled, irregularly shaped composite material protective cover;

[0019] Figure 3 A cross-sectional view of the lower mold in the molding die for a thin-walled, irregularly shaped composite material protective cover;

[0020] Figure 4 A cross-sectional view of the upper mold in the molding die for a thin-walled, irregularly shaped composite material protective cover;

[0021] Figure 5 A schematic diagram showing the positional relationship between the upper and lower molds in the molding die for a thin-walled, irregularly shaped composite material protective cover;

[0022] Figure 6 A side view of the side plate in the molding die of a thin-walled irregular composite material protective cover;

[0023] Figure 7 This is a schematic diagram of the structure of a thin-walled, irregularly shaped composite material protective cover;

[0024] In the diagram: 1. Lower mold; 1-1. First forming area; 1-2. First step; 1-3. Second step; 1-4. First inclined surface; 1-5. Second inclined surface; 1-6. First step platform; 1-7. Second step platform; 1-8. Third step platform; 1-9. Fourth step platform; 2. Upper mold; 2-1. Second forming area; 2-2. Third step; 2-3. Fourth step; 2-4. Third inclined surface; 2-5. Fourth inclined surface; 3. Side plate; 4. First fastening bolt hole; 5. Second fastening bolt hole; 6. Third fastening bolt hole; 7. Fourth fastening bolt hole; 8. First ejector bolt hole; 9. Second ejector bolt hole; 10. Ejector bolt; 12. Rib plate; 13. Groove; 14. Tapered pin hole; 15. First cylindrical pin hole; 16. Second cylindrical pin hole. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of the present utility model can be combined with each other, and the described embodiments are only some embodiments of the present utility model, not all embodiments.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] See appendix Figure 1-7 This embodiment describes a molding die for a thin-walled, irregularly shaped composite material protective cover, comprising an upper die 2 and a lower die 1. The upper die 2 has multiple first ejector bolt holes at both ends. The lower die 1 includes a first molding area 1-1, a first step 1-2, and a second step 1-3. The first molding area 1-1 is located at the top of the lower die 1. The longitudinal section of the first molding area 1-1 is an arc-shaped protrusion. One end of the arc-shaped protrusion smoothly transitions to a first inclined surface 1-4 between itself and the first step 1-2, and the other end smoothly transitions to a second inclined surface 1-5 between itself and the second step 1-3. A first step 1-2 and a second step 1-3 are respectively provided at each end of the top of the lower die 1. The first step 1-2 includes a first stepped platform 1-6 and a second stepped platform 1-7. The second step 1-3 includes a third stepped platform 1-8 and a fourth stepped platform 1-9. The lower end of the first inclined surface 1-4 is lower... On the first stepped platform 1-6, the lower end of the second inclined surface 1-5 is lower than the third stepped platform 1-8. The upper mold 2 includes a second forming area 2-1, a third step 2-2, and a fourth step 2-3. The second forming area 2-1 is located at the bottom of the upper mold 2. The longitudinal section of the second forming area 2-1 is an arc-shaped groove. The two ends of the arc-shaped groove smoothly transition to the third inclined surface 2-4 corresponding to the first inclined surface 1-4 and the fourth inclined surface 2-5 corresponding to the second inclined surface 1-5, respectively. At the two ends of the bottom of the upper mold 2, the third step 2-2 corresponding to the first step 1-2 and the fourth step 2-3 corresponding to the second step 1-3 are respectively provided. The second forming area 2-1 is fastened above the first forming area 1-1. The third step 2-2 overlaps on the corresponding first step 1-2, and the fourth step 2-3 overlaps on the corresponding second step 1-3. The upper mold 2 and the lower mold 1 are fixed together by bolts.

[0028] This invention forms a convex surface of a thin-walled irregular composite material protective cover using an upper mold 2 and a concave surface using a lower mold 1. The upper mold 2's second forming area 2-1 is positioned above the lower mold 1's first forming area 1-1. Because the lower end of the first inclined surface 1-4 is lower than the first stepped platform 1-6, and the lower end of the second inclined surface 1-5 is lower than the third stepped platform 1-8, forming gaps are created between the first inclined surface 1-4 and the third inclined surface 2-4, the second forming area 2-1 and the first forming area 1-1, and the second inclined surface 1-5 and the fourth inclined surface 2-5. This design utilizes the thin-walled irregular composite material to form a protective cover. The thickness of the protective cover limits the thickness of the molding gap. The upper and lower molds are initially positioned by the overlap of the second stepped platform 2-2 and the first stepped platform 1-2, which facilitates the subsequent fixing. The upper mold 2 and the lower mold 1 are fixed by bolts to apply the pre-tightening force when the mold is closed, so that the upper mold 2 and the lower mold 1 abut against each other. After molding, the upper mold 2 and the lower mold 1 are demolded by tightening the ejector bolt 10 in the first ejector bolt hole. The cooperation of the upper mold 2 and the lower mold 1 realizes the integral laying and molding of the thin-walled irregular composite material protective cover, ensuring the molding accuracy and structural integrity of the complex curved surface of the thin-walled irregular composite material protective cover, which greatly improves production efficiency and production accuracy.

[0029] Ribs 12 are provided on both sides of the upper mold 2 and the lower mold 1, and multiple first fastening bolt holes 4 are provided on the ribs 12.

[0030] The ribs 12 on both sides of the upper mold 2 and the lower mold 1 are fixedly connected to the side plates 3. Each of the two side plates 3 has a second fastening bolt hole 5 corresponding to the first fastening bolt hole 4. A groove 13 is provided on the side plate 3 near the position between the first molding area 1-1 and the second molding area 2-1. The relative arrangement of the second fastening bolt holes 5 and the first fastening bolt holes 4 facilitates the fixed connection between the ribs 12 and the side plates 3, ensuring fiber continuity and resin content control, effectively guaranteeing the strength of the final protective cover. The groove 13 on the side plate 3 near the position between the first molding area 1-1 and the second molding area 2-1 allows overflowing resin to flow out of the mold. Simultaneously, the groove 13 creates gaps between the side plate 3 and both the upper mold 2 and the lower mold 1, facilitating demolding.

[0031] The upper mold 2 has multiple third fastening bolt holes 6 at both ends, and the lower mold 1 has fourth fastening bolt holes 7 at both ends corresponding to the third fastening bolt holes 6. Each third fastening bolt hole 6 and the corresponding fourth fastening bolt hole 7 are fastened together by bolts. By fastening the third fastening bolt holes 6 and the fourth fastening bolt holes 7 with bolts, a preload force is applied when the mold is closed, so that the upper mold 2 and the lower mold 1 abut against each other, ensuring the forming accuracy of the complex curved surface of the thin-walled irregular composite material protective cover.

[0032] Multiple second ejector bolt holes 9 are respectively provided on the side plate 3. The second ejector bolt holes 9 provide installation space for the ejector bolts, thereby realizing the separation of the side plate 3 from the upper mold 2 and the lower mold 1.

[0033] Each of the first ejector bolt holes 8 and the second ejector bolt holes 9 is threaded with an ejector bolt 10. Specifically, the ejector bolt 10 is not limited to an internal hex bolt. The end of the ejector bolt 10 in the first ejector bolt hole 8 abuts against the upper surface of the lower mold 1, and the end of the ejector bolt 10 in the second ejector bolt hole 9 abuts against the side of the upper mold 2 and the lower mold 1. The distance between the upper mold 2 and the lower mold 1 gradually increases as the ejector bolt 10 is tightened to complete the demolding of the upper mold 2 and the lower mold 1. The demolding of the side plate 3 is carried out in the same way as that of the upper mold 2 and the lower mold 1. The ejector bolt 10 realizes the integral molding and co-curing of the thin-walled irregular composite material protective cover, which better utilizes the mechanical properties of the glass fiber composite material.

[0034] The upper mold 2 and the lower mold 1 are positioned by tapered pins.

[0035] The upper mold 2 and the two side plates 3 are positioned by cylindrical pins.

[0036] The upper mold 2, lower mold 1, and two side plates 3 are all made of metal. The metal material facilitates the demolding of the thin-walled irregular composite material protective cover from the upper and lower molds. At the same time, the metal material makes it easy to clean the resin and other materials adhering to it.

[0037] The specific molding steps of this utility model are as follows:

[0038] S1: Lay a glass fiber cloth impregnated with resin of a set thickness in the first molding area 1-1, so that the glass fiber cloth covers the lower mold 1, and fold the glass fiber cloth to the side of the lower mold 1 at the joint surface of the upper mold 2 and the lower mold 1.

[0039] S2: After the fiberglass cloth of the set thickness is laid out, first align the positions of the third fastening bolt hole 6 and the fourth fastening bolt hole 7. The tapered pin passes through the tapered pin hole 14 from the upper mold 2 and is inserted into the lower mold 1. After the tapered pins at both ends are inserted, screw the fastening bolts into the third fastening bolt holes 6 and the fourth fastening bolt holes 7 at both ends of the upper mold 2 and the lower mold 1 and tighten them.

[0040] S3: Align the first fastening bolt hole 4 and the second fastening bolt hole 5 with the first cylindrical pin hole 15 and the second cylindrical pin hole 16 respectively. Insert the cylindrical pin into the second cylindrical pin hole 16 and the first cylindrical pin hole 15. Then screw the fastening bolts into the first fastening bolt hole 4 and the second fastening bolt hole 5 respectively and tighten them.

[0041] S4: After curing at room temperature, first unscrew the fastening bolts between the side plate 3 and the upper mold 2 and the lower mold 1, and then screw the ejector bolt 10 into the side plate 3. The side plate 3 is then separated from the upper mold 2 and the lower mold 1.

[0042] S5: Remove the fastening bolts at both ends of the upper mold 2 and the lower mold 1, and then screw in the ejector bolt 10 between the upper mold 2 and the lower mold 1 to separate the mating surfaces between the upper mold 2 and the lower mold 1, thus completing the demolding.

[0043] Obviously, the above-disclosed embodiments of the present invention are merely for illustrating the present invention. The embodiments do not exhaustively describe all details, nor do they limit the present invention to specific implementations. Many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. It is neither necessary nor possible to exhaustively describe all implementation methods here.

Claims

1. A molding die for a thin-walled, irregularly shaped composite material protective cover, characterized in that: The upper mold (2) includes an upper mold (2) and a lower mold (1). The upper mold (2) has multiple first ejector bolt holes at both ends. The lower mold (1) includes a first forming area (1-1), a first step (1-2), and a second step (1-3). The first forming area (1-1) is located on the top of the lower mold (1). The longitudinal section of the first forming area (1-1) is an arc-shaped protrusion. One end of the arc-shaped protrusion smoothly transitions to a first inclined surface (1-4) between itself and the first step (1-2). The other end of the arc-shaped protrusion... The second step (1-3) smoothly transitions into a second inclined surface (1-5). A first step (1-2) and a second step (1-3) are each provided at both ends of the top of the lower mold (1). The first step (1-2) includes a first step platform (1-6) and a second step platform (1-7). The second step (1-3) includes a third step platform (1-8) and a fourth step platform (1-9). The lower end of the first inclined surface (1-4) is lower than the first step platform (1-6). The lower end of the second inclined surface (1-5) is lower than the third stepped platform (1-8). The upper mold (2) includes a second forming area (2-1), a third step (2-2), and a fourth step (2-3). The second forming area (2-1) is located at the bottom of the upper mold (2). The longitudinal section of the second forming area (2-1) is an arc-shaped groove. The two ends of the arc-shaped groove smoothly transition to the third inclined surface (2-4) corresponding to the first inclined surface (1-4) and the third inclined surface (2-4) corresponding to the second inclined surface (1-5), respectively. The fourth inclined surface (2-5) has a third step (2-2) corresponding to the first step (1-2) and a fourth step (2-3) corresponding to the second step (1-3) at both ends of the bottom of the upper mold (2). The second forming area (2-1) is fastened above the first forming area (1-1). The third step (2-2) overlaps on the corresponding first step (1-2) and the fourth step (2-3) overlaps on the corresponding second step (1-3). The upper mold (2) and the lower mold (1) are fixed together by bolts.

2. The molding die for a thin-walled irregular composite material protective cover according to claim 1, characterized in that: Ribs (12) are provided on both sides of the upper mold (2) and the lower mold (1), and multiple first fastening bolt holes (4) are provided on the ribs (12).

3. The molding die for a thin-walled irregular composite material protective cover according to claim 2, characterized in that: The ribs (12) on both sides of the upper mold (2) and the lower mold (1) are fixedly connected to the side plates (3). The two side plates (3) are provided with second fastening bolt holes (5) corresponding to the first fastening bolt holes (4). The side plates (3) are provided with grooves (13) near the position between the first forming area (1-1) and the second forming area (2-1).

4. The molding die for a thin-walled irregular composite material protective cover according to claim 1, characterized in that: The upper mold (2) has multiple third fastening bolt holes (6) at both ends, and the lower mold (1) has fourth fastening bolt holes (7) at both ends corresponding to the third fastening bolt holes (6). Each third fastening bolt hole (6) and the corresponding fourth fastening bolt hole (7) are fastened together by bolts.

5. The molding die for a thin-walled irregular composite material protective cover according to claim 3, characterized in that: Multiple second ejector bolt holes (9) are respectively opened on the side plate (3).

6. The molding die for a thin-walled irregular composite material protective cover according to claim 5, characterized in that: Each of the first ejector bolt hole (8) and the second ejector bolt hole (9) is threaded with an ejector bolt (10).

7. The molding die for a thin-walled irregular composite material protective cover according to claim 1, characterized in that: The upper mold (2) and the lower mold (1) are positioned by tapered pins.

8. The molding die for a thin-walled irregular composite material protective cover according to claim 3, characterized in that: The upper mold (2) and the two side plates (3) are positioned by cylindrical pins.

9. The molding die for a thin-walled irregular composite material protective cover according to claim 2, characterized in that: The upper mold (2), lower mold (1) and two side plates (3) are all made of metal.

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