Composite material curved ladder pipe forming die

Abstract

The utility model provides a curved ladder pipe forming die made of composite materials, which comprises a bottom die and a top die, and the sections of the bottom die and the top die are respectively in curved shapes which are matched with each other; a first lower die cavity and a second lower die cavity which are symmetrically arranged are respectively formed in the bottom die and the top die; a side edge cylindrical positioning groove is formed in the outer side edge of the first lower die cavity; t-shaped positioning grooves are formed in the inner side edges of the first lower die cavity and the second lower die cavity; preset bolt holes are correspondingly machined in the bottom die and the top die, and positioning column fixing devices used for positioning and mounting ladder assembly plate mounting columns are arranged at the positions where the preset bolt holes are located. The forming die can be used for performing hot press forming on the curve-shaped ladder frame made of the composite material, so that the curve-shaped ladder frame meets the functional structure requirements of the ladder frame, integrated forming can be realized, the forming process is simplified, and the forming efficiency and quality are improved.

Description

Technical Field

[0001] This utility model belongs to the field of composite material boarding ladder component molding technology, specifically relating to a composite material curved ladder tube molding mold. Background Technology

[0002] Existing boarding ladders are mainly made of aluminum alloy, which makes them heavy and time-consuming and labor-intensive to handle and transport. Therefore, to ensure structural strength while maintaining the boarding ladder's structural integrity, the materials used need to be improved. Currently, a carbon-glass fiber hybrid composite foam sandwich structure is being designed for the main structure. The core material is PMI foam, with carbon fiber prepreg laid on the core surface, and then glass fiber fabric prepreg laid on top. The overall design prioritizes lightweight construction, while the addition of the foam core and glass fiber improves overall rigidity, impact resistance, and abrasion resistance.

[0003] If a carbon-glass fiber hybrid composite foam sandwich structure is used, its molding process requires hot pressing, which necessitates the design of a corresponding molding mold. Furthermore, if the ladder section to be molded is a curved structure, the mold must be able to adapt well to the molding of the corresponding ladder section. Utility Model Content

[0004] The purpose of this invention is to provide a molding die for a curved ladder tube made of composite materials. This molding die can be used to hot press and form a curved ladder frame made of composite materials, thereby meeting the functional structural requirements of the ladder frame. It can achieve integrated molding, simplify the molding process, and improve molding efficiency and quality.

[0005] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: A curved ladder tube forming mold for composite materials includes a bottom mold and a top mold, the cross sections of which are respectively adopted as mutually matching curved shapes; a first lower mold cavity and a second lower mold cavity are respectively machined on the bottom mold and the top mold; a side column-shaped positioning groove is provided on the outer side of the first lower mold cavity; a T-shaped positioning groove is provided on the inner side of the first lower mold cavity and the second lower mold cavity; preset bolt holes are correspondingly machined on the bottom mold and the top mold, and a positioning column fixing device for positioning and installing ladder frame plate mounting columns is provided at the location of the preset bolt holes.

[0006] The bottom mold and the top mold are provided with mold positioning structures at their four corners. The mold positioning structures include positioning holes machined at the four corners of the bottom mold and the top mold, a positioning cone is fixedly installed on the positioning hole of the bottom mold, and a positioning sleeve is fixedly installed on the positioning hole of the top mold. The positioning cone and the positioning sleeve are inserted and positioned together.

[0007] A triangular mold cavity is provided at the top end of the first lower mold cavity and the second lower mold cavity, and an ear plate mold cavity is provided at the bottom end of the first lower mold cavity and the second lower mold cavity through a curved section mold cavity transition.

[0008] The triangular cavity is used to position and place the ladder frame connecting plate;

[0009] The first lower mold cavity is used to position and place the first ladder plate, and the second lower mold cavity is used to position and place the second ladder plate.

[0010] The thickness of the ear plate mold cavity is less than the thickness of the first lower mold cavity and the second lower mold cavity.

[0011] The location of the side column-shaped positioning groove is used to position and place the ladder handrail connecting seat.

[0012] The T-shaped positioning groove is used to position and place the T-shaped positioning block.

[0013] The bottom mold and the top mold are provided with locking mechanisms at their four corners. The locking mechanisms include locking bolt holes machined at the four corners of the top of the top mold. Locking bolts are installed at the corresponding locations of the locking bolt holes. The other end of the locking bolts is threaded into the corresponding bolt holes on the bottom mold.

[0014] The positioning column fixing device includes an upper positioning bolt installed inside the preset bolt hole of the top mold. The end of the upper positioning bolt is used to position the ladder plate mounting column. The bottom end of the ladder plate mounting column is fixedly connected to a pre-embedded connecting column. The pre-embedded connecting column is set inside the corresponding first ladder plate and second ladder plate. The bottom end of the ladder plate mounting column is positioned by a lower positioning bolt, which is installed inside the preset bolt hole of the bottom mold.

[0015] The present invention has the following beneficial effects:

[0016] 1. This molding die can be used for hot pressing of curved ladder frames made of composite materials, so that they meet the functional structural requirements of the ladder frames. It can achieve one-piece molding, simplify the molding process, and improve molding efficiency and quality.

[0017] 2. The above-mentioned mold positioning structure can achieve reliable alignment between the bottom mold and the top mold during the hot pressing process, thereby achieving precise mold closing during the mold closing process.

[0018] 3. The triangular mold cavity described above enables the subsequent positioning and placement of the pre-embedded ladder frame connecting plate.

[0019] 4. The above-mentioned mold cavity can be used to place the corresponding ladder plate to facilitate subsequent hot pressing molding.

[0020] 5. Through the above-mentioned thickness arrangement, it is ensured that the thickness of the formed ladder frame ear plate is less than the thickness of the corresponding first ladder frame plate and second ladder frame plate.

[0021] 6. The above structure ensures the reliable positioning of the ladder handrail connecting seat, so as to ensure the reliable connection between it and the first and second ladder plates.

[0022] 7. The T-shaped positioning groove described above enables reliable positioning of the T-shaped positioning block, ensuring a reliable connection between it and the first and second ladder plates.

[0023] 8. The locking mechanism described above facilitates the locking between the bottom mold and the top mold during the subsequent hot pressing process.

[0024] 9. The positioning column fixing device described above can be used to pre-embed and fix the ladder plate mounting columns and pre-embed the connecting columns inside the first and second ladder plates to ensure the subsequent installation of the ladder plates. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a first-person perspective 3D view of the present invention.

[0027] Figure 2 This is a two-dimensional view of the present invention from a second perspective.

[0028] Figure 3 This is a three-dimensional view of the present invention from a third perspective.

[0029] Figure 4 This is a first-view 3D view of the bottom mold of this utility model.

[0030] Figure 5 This is a two-dimensional view of the bottom mold of this utility model from a second perspective.

[0031] Figure 6 This is a three-dimensional view of the top mold of this utility model from a first-person perspective.

[0032] Figure 7 This is a two-dimensional view of the top mold of this utility model from a second perspective.

[0033] Figure 8 This is a first-view three-dimensional view of the top mold of this utility model after the ladder frame component is placed.

[0034] Figure 9 This is a second-view three-dimensional view of the top mold of this utility model after the ladder frame component is placed.

[0035] Figure 10 This is a structural diagram showing the placement of the ladder frame component inside the mold.

[0036] In the diagram: 1. Bottom mold; 2. Positioning hole; 3. Top mold; 4. Locking bolt hole; 5. Locking long bolt; 6. Pre-set bolt hole; 7. Upper positioning bolt; 8. Positioning cone; 9. Triangular mold cavity; 10. Side columnar positioning groove; 11. First lower mold cavity; 12. Second lower mold cavity; 13. T-shaped positioning groove; 14. Curved section mold cavity; 15. Ear plate mold cavity; 16. Positioning sleeve; 17. First ladder frame plate; 18. Ladder frame handrail connecting seat; 19. Second ladder frame plate; 20. T-shaped positioning block; 21. Curved ladder frame section; 22. Ladder frame ear plate; 23. Ladder frame connecting plate; 24. Ladder frame plate mounting column; 25. Lower positioning bolt; 26. Pre-embedded connecting column; 27. Bolt hole. Detailed Implementation

[0037] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0038] See Figure 1-10 A composite material curved ladder tube forming mold includes a bottom mold 1 and a top mold 3, the cross-sections of which are respectively made of mutually matching curved shapes; a first lower mold cavity 11 and a second lower mold cavity 12 are respectively machined on the bottom mold 1 and the top mold 3; a side columnar positioning groove 10 is provided on the outer side of the first lower mold cavity 11; a T-shaped positioning groove 13 is provided on the inner side of the first lower mold cavity 11 and the second lower mold cavity 12; pre-set bolt holes 6 are correspondingly machined on the bottom mold 1 and the top mold 3, and a positioning post fixing device for positioning and installing ladder frame plate mounting posts 24 is provided at the location of the pre-set bolt holes 6. This forming mold can be used for hot pressing forming of composite material curved ladder frames, thereby making them meet the functional structural requirements of the ladder frame, realizing integrated molding, simplifying the molding process, and improving molding efficiency and quality. During the molding process, through

[0039] Furthermore, mold positioning structures are provided at the four corners of the bottom mold 1 and the top mold 3. These mold positioning structures include positioning holes 2 machined at the four corners of the bottom mold 1 and the top mold 3. A positioning cone 8 is fixedly installed in the positioning hole 2 of the bottom mold 1, and a positioning sleeve 16 is fixedly installed in the positioning hole 2 of the top mold 3. The positioning cone 8 and the positioning sleeve 16 are inserted and positioned together. Through the aforementioned mold positioning structures, reliable alignment between the bottom mold 1 and the top mold 3 can be achieved during the hot pressing process, thereby achieving precise mold closing during the mold closing process.

[0040] Furthermore, a triangular mold cavity 9 is provided at the top end of the first lower mold cavity 11 and the second lower mold cavity 12, and an ear plate mold cavity 15 is provided at the bottom end of the first lower mold cavity 11 and the second lower mold cavity 12 through a curved section mold cavity 14. The triangular mold cavity 9 enables the subsequent positioning and placement of the pre-embedded ladder frame connecting plate 23. The curved section mold cavity 14 is used to form curved sections.

[0041] Furthermore, the triangular cavity 9 is used to position and place the ladder frame connecting plate 23, thereby ensuring the positioning accuracy of the ladder frame connecting plate 23.

[0042] Furthermore, the first lower mold cavity 11 is used to position and place the first ladder plate 17, and the second lower mold cavity 12 is used to position and place the second ladder plate 19. The mold cavities described above can be used to place the corresponding ladder plates to facilitate subsequent hot pressing.

[0043] Furthermore, the thickness of the ear plate mold cavity 15 is less than the thickness of the first lower mold cavity 11 and the second lower mold cavity 12. Through the above-mentioned thickness arrangement, it is ensured that the thickness of the formed ladder frame ear plate 22 is less than the thickness of the corresponding first ladder frame plate 17 and second ladder frame plate 19.

[0044] Furthermore, the side columnar positioning groove 10 is used to position and place the ladder frame handrail connecting seat 18. The above structure ensures reliable positioning of the ladder frame handrail connecting seat 18, thereby ensuring reliable connection between it and the first ladder frame plate 17 and the second ladder frame plate 19.

[0045] Furthermore, the T-shaped positioning groove 13 is used to position and place the T-shaped positioning block 20. The T-shaped positioning groove 13 enables reliable positioning of the T-shaped positioning block 20, thereby ensuring a reliable connection between it and the first ladder plate 17 and the second ladder plate 19.

[0046] Furthermore, locking mechanisms are provided at the four corners of the bottom mold 1 and the top mold 3. These locking mechanisms include locking bolt holes 4 machined at the four corners of the top of the top mold 3. Long locking bolts 5 are installed at the corresponding locations of the locking bolt holes 4, and the other end of the long locking bolts 5 is threaded into the corresponding bolt holes 27 on the bottom mold 1. These locking mechanisms facilitate the locking between the bottom mold 1 and the top mold 3 during subsequent hot pressing.

[0047] Furthermore, the positioning column fixing device includes an upper positioning bolt 7 correspondingly installed inside the preset bolt hole 6 of the top mold 3. The end of the upper positioning bolt 7 is used to position and install the ladder plate mounting column 24. The bottom end of the ladder plate mounting column 24 is fixedly connected to a pre-embedded connecting column 26, which is disposed inside the corresponding first ladder plate 17 and second ladder plate 19. The bottom end of the ladder plate mounting column 24 is positioned by a lower positioning bolt 25, which is correspondingly installed inside the preset bolt hole 6 of the bottom mold 1. The positioning column fixing device described above can be used to pre-embed and fix the ladder plate mounting column 24 and the pre-embedded connecting column 26 inside the first ladder plate 17 and the second ladder plate 19 to ensure the subsequent installation of the ladder plate.

[0048] The specific working process and principle of this utility model are as follows:

[0049] 1. Mold preparation:

[0050] 1.1 Parts pre-assembly mold: Place all embedded parts and foam cores on the mold for pre-assembly. Check the position of the mold interchangeable block and the position of the embedded parts according to the drawings / work cards. Check whether there is any interference in the shape of the embedded parts after they are embedded. Pay special attention to the matching of the R-corner parts.

[0051] 1.2 Mold Pretreatment:

[0052] (1) When using for the first time: clean and remove oil with mold cleaner -- dry on the molding hot table at 150℃ for 30 minutes -- wipe the mold surface with a scouring pad and then clean the surface again with a cloth -- apply the mold release agent once and then cool on the cooling table for 8 minutes -- apply the mold release agent again and wait for the mold release agent to dry.

[0053] (2) Later use: Depending on the production situation (it is recommended to use it once every 2 days when using it frequently), it is necessary to use mold cleaning agent regularly to clean the mold and process the mold according to the first use operation procedure.

[0054] 2. Material feeding:

[0055] 2.1 Yarn bonding: Bond the ±45°, 0°, and 90° unidirectional prepregs in advance and vacuum pre-compact them to prevent air bubbles from forming inside and causing delamination.

[0056] 2.2 Cutting: Cut the prepreg and film according to the number of layers, angles and dimensions on the drawings / digital model / structure sheet (check the angles to ensure they are correct when cutting).

[0057] 3. Treatment of embedded parts and foam core

[0058] 3.1 Embedded parts: After anodizing, apply adhesive film and fiberglass fabric to the surface of the embedded parts (to prevent potential corrosion) and record the weight.

[0059] 3.2 Foam core: Before laying, the foam core should be baked (80℃, 40min) to remove moisture. After cleaning the surface of the foam core, it should be covered with adhesive film and weighed and recorded.

[0060] 4. Precast concrete paving:

[0061] According to the work card / structure sheet laying requirements, check whether the prepreg, film grade, angle and quantity match, and lay it as required. During the laying process, the outer diameter should be checked at any time to prevent yarn jamming or glue accumulation during the molding process. After the laying is completed, weigh and record it, and attach a label to the surface to distinguish the model for easy mold entry confirmation.

[0062] 5. Place in mold:

[0063] 5.1 Check the mold surface for any foreign matter, ensure the mold interchangeable blocks are correct, and verify that the material matches the mold. When inserting the mold, pay attention to whether the pre-formed material dimensions match the mold dimensions. If there are any discrepancies, return the mold to the previous process for adjustment.

[0064] 5.2 During the molding process, avoid hitting the surface of the pre-shaped material (if it is necessary to hit it, a rubber pad should be added to prevent damage to the material), and ensure that no yarn gets caught.

[0065] 5.3 When closing the mold, pay attention to checking whether the embedded parts of the product are correct and the mold positioning pins to prevent the product from being misaligned.

[0066] 6. Curing:

[0067] Check if the molding time, temperature, and oil pressure are correct. The heating time is 90 min, the heating temperature is 130 ℃, the oil pressure of the hot press is (100±5) kg / cm2 (about 10 MPa), the cooling time is 10 min, and the oil pressure of the cooling press is (45±5) kg / cm2 (about 5 MPa).

[0068] 7. Demolding:

[0069] 7.1 Remove the mold after it has cooled to below 60°C.

[0070] 7.2 When opening the mold, care should be taken to prevent product damage. After taking out the product, check whether the embedded parts are damaged and whether there are defects such as yarn jamming or glue accumulation on the appearance. If any defects are found, the previous process should be notified in time for adjustment.

[0071] 8. Post-processing:

[0072] For rough edges or local defects in the mold, use structural adhesive (such as SY49, AB glue, etc.) to repair them, clean foreign objects from the embedded parts, weigh them and record the weight.

[0073] 9. Spray painting:

[0074] After the surface is molded, a primer is sprayed on. After the second molding, putty is applied and then the surface is molded again and a topcoat is sprayed on.

[0075] 10. Assembly:

[0076] Assemble the parts according to the drawings.

Claims

1. A composite material curved trapezoidal tube forming mold, characterized in that, The mold includes a bottom mold (1) and a top mold (3), the cross sections of which are respectively made of mutually matching curves; the bottom mold (1) and the top mold (3) are respectively machined with a first lower mold cavity (11) and a second lower mold cavity (12) arranged symmetrically; the outer side of the first lower mold cavity (11) is provided with a side column positioning groove (10); the inner side of the first lower mold cavity (11) and the second lower mold cavity (12) is provided with a T-shaped positioning groove (13); the bottom mold (1) and the top mold (3) are respectively machined with preset bolt holes (6), and the location of the preset bolt holes (6) is provided with a positioning column fixing device for positioning and installing the ladder plate mounting column (24).

2. The composite material curved trapezoidal tube forming mold according to claim 1, characterized in that: The bottom mold (1) and the top mold (3) are provided with mold positioning structures at their four corners. The mold positioning structures include positioning holes (2) machined at the four corners of the bottom mold (1) and the top mold (3). A positioning cone (8) is fixedly installed on the positioning hole (2) of the bottom mold (1), and a positioning sleeve (16) is fixedly installed on the positioning hole (2) of the top mold (3). The positioning cone (8) and the positioning sleeve (16) are inserted and positioned together.

3. The curved trapezoidal tube forming mold of composite material according to claim 1, characterized in that: The first lower mold cavity (11) and the second lower mold cavity (12) are provided with a triangular mold cavity (9) at the top end, and the first lower mold cavity (11) and the second lower mold cavity (12) are provided with an ear plate mold cavity (15) at the bottom end through a curved segment mold cavity (14).

4. The curved trapezoidal tube forming mold of composite material according to claim 3, characterized in that: The triangular cavity (9) is used to position and place the ladder frame connecting plate (23); The first lower mold cavity (11) is used to position and place the first ladder plate (17), and the second lower mold cavity (12) is used to position and place the second ladder plate (19).

5. The composite material curved trapezoidal tube forming mold according to claim 3, characterized in that: The thickness of the ear plate mold cavity (15) is less than the thickness of the first lower mold cavity (11) and the second lower mold cavity (12).

6. The curved trapezoidal tube forming mold of composite material according to claim 1, characterized in that: The side columnar positioning groove (10) is used to position and place the ladder handrail connecting seat (18).

7. The composite material curved trapezoidal tube forming mold according to claim 1, characterized in that: The T-shaped positioning groove (13) is located at a position for placing the T-shaped positioning block (20).

8. The curved trapezoidal tube forming mold of composite material according to claim 1, characterized in that: Locking mechanisms are provided at the four corners of the bottom mold (1) and the top mold (3). The locking mechanisms include locking bolt holes (4) machined at the four corners of the top of the top mold (3). Locking bolts (5) are installed at the corresponding locations of the locking bolt holes (4). The other end of the locking bolts (5) is threadedly engaged with the bolt holes (27) at the corresponding locations on the bottom mold (1).

9. The composite material curved trapezoidal tube forming mold according to claim 4, characterized in that: The positioning column fixing device includes an upper positioning bolt (7) installed inside the preset bolt hole (6) of the top mold (3). The end of the upper positioning bolt (7) is used to position the ladder plate mounting column (24). The bottom end of the ladder plate mounting column (24) is fixedly connected to the embedded connecting column (26). The embedded connecting column (26) is set inside the corresponding first ladder plate (17) and second ladder plate (19). The bottom end of the ladder plate mounting column (24) is positioned by the lower positioning bolt (25). The lower positioning bolt (25) is installed inside the preset bolt hole (6) of the bottom mold (1).

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