Multi-point forming die

Abstract

The invention relates to the technical field of molds, and discloses a multi-point forming mold, the upper end of the multi-point forming mold is provided with a forming pressure head assembly, the forming pressure head assembly comprises a support, the outer wall of the support is circular or the support is cylindrical, the upper end of the support is provided with a first spherical groove, and a large spherical head capable of swinging is arranged in the first spherical groove; a large jacking surface is arranged on the upper end face of the large ball head, a plurality of small ball heads capable of swinging are arranged on the large jacking surface, the small ball heads and the large jacking surface swing to make contact with the pressing surface in the curved surface pressing process of the small ball heads, and the large jacking surface is round; the large ball head of the multi-point forming die can swing in the first spherical groove, first-time shape adaptation can be carried out in the curved surface pressing process, meanwhile, after the small ball head makes direct contact with a pressing face, the small ball head further swings to adjust the position, and therefore the height difference between adjacent pressing points is reduced, the whole pressing curvature is smoother, the pressed curved surface is smoother, and the pressing efficiency is improved. The three-dimensional curved surface is higher in precision, and wrinkles on the surface of the product are prevented.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and more specifically, to a multi-point forming mold. Background Technology

[0002] Curved or irregularly shaped curved panels are typically processed using a multi-point pressing press. There are two types of existing multi-point forming press heads: one is a round press head with a hemispherical top, and the other is a square press head with a flat top. For example, Chinese patent document CN120532946A discloses a multi-point forming mold, including an upper mold and a lower mold. Both the upper and lower molds include a mold base, multiple press head assemblies, and multiple guide components. The multiple press head assemblies are fixedly connected in a rectangular array within the mold base. Each press head assembly includes a motor, a screw, a threaded sleeve, and a forming press head. The motor drives the screw to rotate, and the screw is threadedly connected to the threaded sleeve. The forming press head is either a spherical press head or a square press head.

[0003] However, in the above-mentioned existing forming head structure, during the pressing process of curved or irregularly shaped curved panels, since the entire surface of the forming head is the main pressing surface, and the adjacent pressing surfaces are at different heights when they make line contact, a point-like height difference occurs, causing the curvature of the point-like pressing surfaces to deform. This results in wrinkles or deformation on the surface of the formed product. Even if the entire spherical or square pressing head is adaptively oscillated, it is difficult to compensate for the height difference between the surfaces, and the product surface still has some wrinkles or deformation. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the present invention provides a multi-point forming mold to solve the above and related problems.

[0005] The technical solution adopted by the present invention to solve its technical problem is: a multi-point forming mold, wherein a forming pressure head assembly is provided at the upper end, the forming pressure head assembly includes a support, a first spherical groove is provided at the upper end of the support, a swingable large ball head is provided in the first spherical groove, a large top pressing surface is provided on the upper end surface of the large ball head, and a plurality of swingable small ball heads are provided on the large top pressing surface, so that during the process of the small ball heads pressing the curved surface, the plurality of small ball heads and the large top pressing surface contact the pressing surface by swinging.

[0006] The beneficial effects of this invention are that the large ball head can swing within the first spherical groove, allowing for the first shape adaptation during the curved surface pressing process. Meanwhile, after the small ball head directly contacts the pressing surface, it further swings and adjusts its position, thereby reducing the height difference between adjacent pressing points, making the overall pressing curvature smoother, the pressed curved surface more fluid, and the three-dimensional curved surface more accurate, thus preventing wrinkles from appearing on the surface of the product.

[0007] Furthermore, the support has a first magnet groove located inside the first spherical groove. The upper end of the first magnet groove is open, and a first magnet for magnetically attracting the large ball head is installed inside the first magnet groove.

[0008] With the above-mentioned further structure, the surface shape of the large ball head matches the inner wall of the first spherical groove, so that after the large ball head is embedded in the first spherical groove, it can be magnetically attracted by the first magnet to prevent the large ball head from falling off. At the same time, during the pressing process, the large ball head can swing more smoothly in the first spherical groove to adapt to the shape of the entire curved surface for adaptive adjustment.

[0009] Furthermore, the large ball head has multiple second spherical grooves at its upper end, and the small ball head includes a small ball seat. The upper end of the small ball seat is provided with a small pressure surface, and the small ball seat is oscillatingly embedded in the second spherical groove.

[0010] With the above-mentioned further structure, the small ball head is embedded in the second spherical groove through the small ball seat, so that the small top pressing surface first contacts the product pressing surface, and then the small ball head swings according to the shape of the curved surface until the small ball head is pressed tightly, and then the large ball head swings to complete the adaptation of the entire curved surface, making the entire curved surface smoother.

[0011] Furthermore, each of the multiple second spherical grooves is provided with a second magnet groove, and a second magnet for magnetically attracting the small ball seat is provided in the second magnet groove.

[0012] With the above-mentioned further structure, the small ball seat can be magnetically secured by the second magnet, which makes it easier for the small ball seat to swing, and also makes disassembly and maintenance more convenient. Similarly, the large ball head can also be easily disassembled and maintained.

[0013] Furthermore, the diameter of the small top pressure surface is the same as the diameter of the small ball seat.

[0014] With the above-mentioned further structure, during the pressing process between the small top pressure surface and the contacting product, after the small ball seat swings to its maximum stroke, the small top pressure surface can better transition to the surface of the large top pressure surface, thereby improving the accuracy of the pressed curved surface.

[0015] Furthermore, a positioning post is provided at the lower end of the support, and a screw hole is opened in the positioning post. The positioning post is inserted into the lifting seat, and the screw hole is connected to the lifting seat by bolts. A screw sleeve is installed at the lower end of the lifting seat, and a screw rod is connected to the screw rod by internal thread. A drive motor is connected to the lower end of the screw rod.

[0016] With the above-mentioned further structure, the support is positioned and installed on the lifting seat by the positioning column, and then the lifting seat is fixed on the screw sleeve, so that the position of the entire forming pressure head assembly is more accurate, so that each pressing surface is more precise.

[0017] Furthermore, a positioning post is provided at the lower end of the support, and a screw hole is opened in the positioning post. The positioning post is inserted into the upper end of the guide rod, and a guide sleeve is sleeved on the outer wall of the guide rod. A hydraulic cylinder is connected to the lower end of the guide rod.

[0018] With the above-mentioned further structure, the hydraulic cylinder can drive the guide rod to rise and fall. During the rising and falling process, the guide rod moves inside the guide sleeve, making the movement smoother.

[0019] Furthermore, the outer wall of the support is polygonal or circular.

[0020] Furthermore, the large top pressure surface is polygonal or circular. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the threaded sleeve and forming pressure head assembly in Example 1.

[0022] Figure 2 This is a three-dimensional structural schematic diagram of an embodiment of the forming pressure head assembly.

[0023] Figure 3 This is an exploded structural diagram of an embodiment of the forming pressure head assembly.

[0024] Figure 4 This is a cross-sectional structural schematic diagram of an embodiment of the forming indenter assembly.

[0025] Figure 5 This is a three-dimensional structural schematic diagram of Embodiment 2 of the forming pressure head assembly.

[0026] Figure 6 This is a three-dimensional structural schematic diagram of the forming pressure head assembly in Embodiment 3.

[0027] Figure 7 This is a three-dimensional structural schematic diagram of Embodiment 4 of the forming pressure head assembly.

[0028] Figure 8 This is a three-dimensional structural diagram of the guide rod and hydraulic cylinder in Example 5.

[0029] In the figure: 1. Screw sleeve, 2. Lifting seat, 3. Forming pressure head assembly, 4. Screw, 5. Drive motor, 6. Support, 7. Positioning post, 8. Large ball head, 9. Large top pressure surface, 10. Small ball head, 11. First spherical groove, 12. First magnet groove, 13. Second spherical groove, 14. Second magnet groove, 15. Second magnet, 16. Small ball seat, 17. Small top pressure surface, 18. Screw hole, 19. Guide rod (20), hydraulic cylinder (21), guide sleeve (22). Detailed Implementation

[0030] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Example 1 Combination Figures 1 to 4 The multi-point forming mold shown has a forming pressure head assembly 3 at its upper end. The forming pressure head assembly 3 includes a support 6. The outer wall of the support 6 is circular or the support 6 is cylindrical. The upper end of the support 6 is provided with a first spherical groove 11. A swingable large ball head 8 is provided in the first spherical groove 11. A large top pressing surface 9 is provided on the upper end surface of the large ball head 8. Multiple swingable small ball heads 10 are provided on the large top pressing surface 9. During the process of pressing the curved surface, the multiple small ball heads 10 and the large top pressing surface 9 contact the pressing surface by swinging. The large top pressing surface 9 is circular. In this embodiment, the large ball head 8 can swing in the first spherical groove 11, which can perform the first shape adaptation during the curved surface pressing process. At the same time, after the small ball heads 10 directly contact the pressing surface, they swing to adjust their positions, thereby reducing the height difference between adjacent pressing points, making the overall pressing curvature smoother, the pressed curved surface more fluid, the three-dimensional curved surface more accurate, and preventing wrinkles from appearing on the surface of the product.

[0032] In this embodiment, the lower end of the support 6 is provided with a positioning post 7, and the positioning post 7 has a screw hole 19. The positioning post 7 is inserted into the lifting seat 2, and the screw hole 19 is connected to the lifting seat 2 by bolts. The lower end of the lifting seat 2 is equipped with a screw sleeve 1, and the screw sleeve 1 is internally threaded with a screw rod 4. The lower end of the screw rod 4 is connected to a drive motor 5. The entire forming head assembly 3 is driven by the drive motor 5 to rotate the screw rod 4, thereby driving the screw sleeve 1 to rise and fall, so as to adjust the position of each entire forming head assembly 3. The support 6 is positioned and installed on the lifting seat 2 by the positioning post 7, and then the lifting seat 2 is fixed on the screw sleeve 1, so that the position of the entire forming head assembly 3 is more accurate, so that each pressing surface is more precise.

[0033] In this embodiment, a first magnet groove 12 is provided in the support 6. The first magnet groove 12 is located in the first spherical groove 11. The upper end of the first magnet groove 12 is open. A first magnet 13 for magnetically attracting the large ball head 8 is installed in the first magnet groove 12. The surface shape of the large ball head 8 matches the inner wall of the first spherical groove 11, so that after the large ball head 8 is embedded in the first spherical groove 11, it can be magnetically attracted by the first magnet 13 to prevent the large ball head 8 from falling off. At the same time, during the pressing process, the large ball head 8 can swing more smoothly in the first spherical groove 11 to adapt to the shape of the entire curved surface for adaptive adjustment.

[0034] In this embodiment, the large ball head 8 has multiple second spherical grooves 14 on its upper end, and the small ball head 10 includes a small ball seat 17. The upper end of the small ball seat 17 is provided with a small pressing surface 18. The small ball seat 17 is oscillatingly embedded in the second spherical groove 14. The small ball head 10 is embedded in the second spherical groove 14 through the small ball seat 17, so that the small pressing surface 18 first contacts the product pressing surface, and then the small ball head 10 oscillates according to the shape of the curved surface until the small ball head 10 is tightly pressed, and then the large ball head 8 oscillates to complete the adaptation of the entire curved surface, making the entire curved surface smoother.

[0035] It is worth noting that each of the multiple second spherical grooves 14 in this embodiment is provided with a second magnet groove 15, and a second magnet 16 for magnetically attracting the small ball seat 17 is provided in the second magnet groove 15; the small ball seat 17 can be magnetically attracted and stabilized by the second magnet 16, which makes it easier for the small ball seat 17 to swing, and also makes disassembly and maintenance more convenient. Similarly, the large ball head 8 can also be easily disassembled and maintained.

[0036] It is also worth noting that the diameter of the small top pressure surface 18 is the same as the diameter of the small ball seat 17. During the pressing process between the small top pressure surface 18 and the contacting product, after the small ball seat 17 swings to its maximum stroke, the small top pressure surface 18 can better transition to the surface of the large top pressure surface 9, thereby improving the accuracy of the pressed curved surface.

[0037] Example 2 like Figure 5 As shown, the difference between this embodiment 2 and embodiment 1 is that the outer wall of the support 6 is square and the large top pressure surface 9 is quadrilateral, so that the large top pressure surface 9 can limit the swing formation. That is to say, during the swing of the large ball head 8, the swing is completed until the edge of the large top pressure surface 9 presses against the support 6, so as to adapt to the product with special pressing surface.

[0038] Example 3 like Figure 6 As shown, the difference between this embodiment 3 and embodiment 1 is that the outer wall of the support 6 is square, the large top pressure surface 9 is circular, and the diameter of the large top pressure surface 9 is the same as the diameter of the large ball head 8.

[0039] Example 4 like Figure 7 As shown, the difference between this embodiment 4 and embodiment 1 is that the outer wall of the support 6 is circular and the large top pressure surface 9 is quadrilateral.

[0040] In some other embodiments, the outer wall of the support 6 or the large top pressure surface 9 can be a quadrilateral, a triangle, or a pentagon, etc.

[0041] Example 5 like Figure 8As shown, the difference between this fifth embodiment and the first embodiment lies in the different lifting structure of the forming head assembly 3. Specifically, a positioning post 7 is provided at the lower end of the support, and a screw hole 19 is opened in the positioning post 7. The positioning post 7 is inserted into the upper end of the guide rod 20, and a guide sleeve 22 is sleeved on the outer wall of the guide rod 20. A hydraulic cylinder 21 is connected to the lower end of the guide rod 20. The hydraulic cylinder 21 can drive the guide rod 20 to lift and lower. During the lifting and lowering process, the guide rod 20 moves within the guide sleeve 22, making the movement smoother.

[0042] In some other embodiments, hydraulic cylinder 21 may be replaced by pneumatic cylinder.

[0043] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A multi-point forming mold, wherein a forming pressure head assembly (3) is provided at its upper end, characterized in that, The forming head assembly (3) includes a support (6), the upper end of the support (6) is provided with a first spherical groove (11), a swingable large ball head (8) is provided in the first spherical groove (11), the upper end surface of the large ball head (8) is provided with a large top pressing surface (9), and a plurality of swingable small ball heads (10) are provided on the large top pressing surface (9), so that during the process of the small ball head (10) pressing the curved surface, the plurality of small ball heads (10) and the large top pressing surface (9) contact the pressing surface by swinging.

2. The multi-point forming mold according to claim 1, characterized in that, The support (6) has a first magnet groove (12) inside. The first magnet groove (12) is located inside the first spherical groove (11). The upper end of the first magnet groove (12) is open. The first magnet (13) for magnetically attracting the large ball head (8) is installed inside the first magnet groove (12).

3. A multi-point forming mold according to claim 2, characterized in that, The large ball head (8) has multiple second spherical grooves (14) at its upper end. The small ball head (10) includes a small ball seat (17). The upper end of the small ball seat (17) is provided with a small top pressure surface (18). The small ball seat (17) is swayably embedded in the second spherical groove (14).

4. A multi-point forming mold according to claim 3, characterized in that, Each of the second spherical grooves (14) is provided with a second magnet groove (15), and a second magnet (16) for magnetically attracting the small ball seat (17) is provided in the second magnet groove (15).

5. A multi-point forming mold according to claim 4, characterized in that, The diameter of the small top pressure surface (18) is the same as the diameter of the small ball seat (17).

6. A multi-point forming mold according to any one of claims 1-5, characterized in that, The lower end of the support (6) is provided with a positioning post (7), and a screw hole (19) is provided in the positioning post (7). The positioning post (7) is inserted into the lifting seat (2), and the screw hole (19) is connected to the lifting seat (2) by bolts. A screw sleeve (1) is installed at the lower end of the lifting seat (2), and a screw rod (4) is threadedly connected to the screw sleeve (1). A drive motor (5) is connected to the lower end of the screw rod (4).

7. A multi-point forming mold according to any one of claims 1-5, characterized in that, The lower end of the support (6) is provided with a positioning post (7), and a screw hole (19) is opened in the positioning post (7). The positioning post (7) is inserted into the upper end of the guide rod (20). A guide sleeve (22) is sleeved on the outer wall of the guide rod (20). The lower end of the guide rod (20) is connected to a hydraulic cylinder (21).

8. A multi-point forming mold according to claim 6 or 7, characterized in that, The outer wall of the support (6) is polygonal or circular.

9. A multi-point forming mold according to claim 6 or 7, characterized in that, The large top pressure surface (9) is polygonal or circular.

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