Four-corner flanging and shaping die
The use of an airbag driven by an electric air pump to push the pusher block out of the automotive body panel solves the problem of demolding damage in traditional molds, and realizes an efficient and damage-free demolding process, which is suitable for parts with high surface quality requirements.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEBEI XINGLIN AUTOMOBILE BODY MAKING GRP
- Filing Date
- 2025-06-11
- Publication Date
- 2026-05-12
AI Technical Summary
Traditional four-corner flanging forming molds are prone to damaging the surface of automotive body panels during demolding, especially large-area or high-requirement body panels. In addition, the delay in multi-cylinder control can cause parts to twist and deform.
An airbag driven by an electric air pump pushes a pusher block to eject the automotive body panel. The expansion of the airbag pushes the pusher block upward to achieve demolding. Combined with a return spring and rollers, friction is reduced to ensure smooth ejection.
It effectively avoids indentations and scratches, and is especially suitable for parts with high surface quality requirements such as mirror stainless steel and anodized aluminum alloy, thus improving production efficiency and product quality.
Smart Images
Figure CN224222502U_ABST
Abstract
Description
Technical Field
[0001] The embodiments disclosed herein relate to the field of automotive mold technology, and more specifically, to a four-corner flanging forming mold. Background Technology
[0002] Molds are various molds and tools used in industrial production to obtain the desired products through injection molding, blow molding, extrusion, die casting or forging, smelting, stamping and other methods. Four-corner flanging and shaping molds are a type of special mold in stamping molds, mainly used for flanging and shaping of the four corner areas of sheet metal parts, and are commonly found in the manufacture of automotive body panels, home appliance shells and other products.
[0003] In the automotive mold manufacturing industry, especially in the production of automotive body panels, the corner flanging and shaping mold plays a crucial role. Automotive body panels, such as doors, hoods, and trunk lids, often require precise flanging and shaping of their edges to achieve good assembly accuracy and appearance quality. However, traditional corner flanging and shaping molds have some shortcomings. After flanging and shaping the automotive body panel, it needs to be ejected from the lower mold using cylinders. When the automotive body panel is large, the cylinders may leave indentations on the surface, especially noticeable when processing large or high-requirement automotive body panels. Therefore, multiple cylinders are generally needed to push the automotive body panel simultaneously. However, when multiple cylinders are controlled independently, there is a millisecond-level delay in the ejection action of the corners and straight edges, causing uneven shearing forces on the parts and leading to twisting deformation. Therefore, improvements are needed. Utility Model Content
[0004] To overcome the above-mentioned defects, the embodiments of this disclosure provide a four-corner flanging forming mold, which solves the technical problem of easy damage to the cylinder during demolding in related technologies.
[0005] According to one aspect, at least one embodiment of this disclosure provides a four-corner flanging shaping mold, including a mold, the mold including a base, a lower mold disposed above the base, a demolding mechanism disposed inside the lower mold, an elongated groove formed on the upper side of the base, a lifting mechanism disposed inside the elongated groove, the lower mold including a lower mold forming block, a through groove formed on the surface of the lower mold forming block, the lifting mechanism including a push block slidably installed inside the through groove, the lifting mechanism including a rectangular plate bolted inside the elongated groove, a rectangular groove formed on the upper side of the rectangular plate, and an airbag placed inside the rectangular groove.
[0006] According to another aspect, at least one embodiment of this disclosure also provides a four-corner flanging forming mold, including: grooves are provided on both sides of the through groove, and connecting plates that are slidably connected inside the grooves are welded to both sides of the push block.
[0007] According to another aspect, at least one embodiment of this disclosure also provides a four-corner flanging forming mold, comprising: an mounting block welded to the outer side of the connecting plate, and rollers rotatably mounted at both ends of the mounting block.
[0008] According to another aspect, at least one embodiment of this disclosure also provides a four-corner flanging forming mold, comprising: a return spring elastically installed between the inner side of the groove and the upper side of the connecting plate, wherein the return spring is in an initial state when the connecting plate is located at the bottom of the groove.
[0009] According to another aspect, at least one embodiment of this disclosure also provides a four-corner flanging shaping mold, comprising: side plates welded to both sides of the base, and a connecting base welded above the side plates.
[0010] According to another aspect, at least one embodiment of this disclosure also provides a four-corner flanging shaping mold, comprising: an electric air pump bolted to the front side of the base, an air pipe threaded onto the upper part of the electric air pump, and the other end of the air pipe penetrating into the interior of a rectangular groove and threadedly connected to the front end of an airbag.
[0011] According to another aspect, at least one embodiment of this disclosure also provides a four-corner flanging shaping mold, comprising: a valve disposed on the outside of the air pipe, the valve being electrically connected to an electric air pump.
[0012] According to another aspect, at least one embodiment of this disclosure also provides a four-corner flanging shaping mold, including: the width of the long groove is equal to the width of the rectangular plate, and the width of the airbag is equal to the width of the rectangular groove.
[0013] According to another aspect, at least one embodiment of this disclosure also provides a four-corner flanging shaping mold, including: the width of the through groove is equal to the width of the long groove, and the width of the push block is greater than the width of the airbag.
[0014] According to another aspect, at least one embodiment of this disclosure also provides a four-corner flanging shaping mold, comprising: the valve being in an open state when the electric air pump is pumping or inflating, and the valve being in a closed state when the electric air pump stops.
[0015] The beneficial effects of the embodiments disclosed herein are as follows:
[0016] In this disclosure, an electric air pump inflates the airbag, causing it to expand and push the pusher block upwards to eject the automotive body panel from the lower mold forming block. Compared with traditional four-corner flanging forming molds, this four-corner flanging forming mold uses an airbag to push the pusher block upwards to eject the automotive body panel from the lower mold forming block, thereby effectively eliminating indentations and scratches. It is especially suitable for parts with high surface quality requirements, such as mirror stainless steel and anodized aluminum alloy. The elastic deformation of the airbag can absorb the impact energy at the moment of demolding, preventing micro-cracks from forming in the material due to sudden stress. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the mold for this utility model;
[0020] Figure 3 This is a schematic diagram of the lower mold of this utility model;
[0021] Figure 4 This is a schematic diagram of the lifting mechanism of this utility model;
[0022] Figure 5 This is a schematic diagram of the demolding mechanism of this utility model;
[0023] Figure 6 This is a partial vertical cross-sectional view of the mold of this utility model.
[0024] In the diagram: 1. Mold; 11. Base; 12. Side plate; 13. Connecting base; 14. Long groove; 2. Lower mold; 21. Lower mold forming block; 22. Through groove; 23. Groove; 24. Return spring; 3. Lifting mechanism; 31. Electric air pump; 32. Rectangular plate; 33. Rectangular groove; 34. Airbag; 35. Air pipe; 36. Valve; 4. Demolding mechanism; 41. Push block; 42. Connecting plate; 43. Mounting block; 44. Roller. Detailed Implementation
[0025] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.
[0026] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."
[0027] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.
[0028] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0029] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to 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 disclosure.
[0030] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0031] like Figures 1-6As shown, it illustrates a four-corner flanging shaping mold according to an embodiment of the present disclosure, including a mold 1, a base 11, a lower mold 2 disposed above the base 11, a demolding mechanism 4 disposed inside the lower mold 2, an elongated groove 14 provided on the upper side of the base 11, a lifting mechanism 3 disposed inside the elongated groove 14, the lower mold 2 including a lower mold forming block 21, a through groove 22 provided on the surface of the lower mold forming block 21, the lifting mechanism 3 including a push block 41 slidably installed inside the through groove 22, the lifting mechanism 3 including a rectangular plate 32 bolted to the inside of the elongated groove 14, a rectangular groove 33 provided on the upper side of the rectangular plate 32, and an airbag 34 placed inside the rectangular groove 33.
[0032] An electric air pump 31 is bolted to the front of the base 11. An air pipe 35 is threaded onto the top of the electric air pump 31. The other end of the air pipe 35 passes through the interior of the rectangular groove 33 and is threaded to the front end of the airbag 34. A valve 36 is provided on the outside of the air pipe 35 and is electrically connected to the electric air pump 31. The width of the long groove 14 is equal to the width of the rectangular plate 32, and the width of the airbag 34 is equal to the width of the rectangular groove 33. The width of the through groove 22 is equal to the width of the long groove 14, and the width of the push block 41 is greater than the width of the airbag 34. When the electric air pump 31 is pumping air or inflating air, the valve 36 is in the open state, and when the electric air pump 31 stops, the valve 36 is in the closed state.
[0033] In some examples, the car body panel is placed above the lower mold 2, and after the flanging and shaping operation is performed, the electric air pump 31 is started, which inflates the airbag 34 through the air pipe 35. At this time, the valve 36 is in the open state, and the airbag 34 expands during the inflation process, which continuously increases the vertical height of the airbag 34. This causes the airbag 34 to push the push block 41, which in turn pushes the car body panel upward, thereby separating the car body panel from the lower mold forming block 21, thus realizing the demolding operation. After the demolding operation is completed, the electric air pump 31 withdraws the gas from the airbag 34, allowing the airbag 34 to return to its original shape, and thus the push block 41 returns to its original position.
[0034] The airbag 34 is inflated by an electric air pump 31, causing it to expand and push the pusher block 41 upward to eject the automotive body panel from the lower mold forming block 21. Compared with traditional four-corner flanging forming molds, this four-corner flanging forming mold uses the airbag 34 to push the pusher block 41 upward to eject the automotive body panel from the lower mold forming block 21, thereby effectively eliminating indentations and scratches. It is especially suitable for parts with high surface quality requirements, such as mirror stainless steel and anodized aluminum alloy. The elastic deformation of the airbag can absorb the impact energy at the moment of demolding, avoiding micro-cracks caused by sudden force on the material.
[0035] like Figures 3-6As shown, a four-corner flanging forming mold is provided in another embodiment of the present disclosure. The through groove 22 has grooves 23 on both sides, and the push block 41 has connecting plates 42 that are slidably connected inside the grooves 23 welded to both sides.
[0036] In some examples, the push block 41 moves up and down, causing the connecting plate 42 to move up and down inside the groove 23, thereby limiting the push block 41.
[0037] like Figures 3-6 As shown, a four-corner flanging forming mold is provided in another embodiment of the present disclosure. A mounting block 43 is welded to the outside of the connecting plate 42, and rollers 44 are rotatably mounted on both ends of the mounting block 43.
[0038] In some examples, the connecting plate 42 moves inside the groove 23, causing the roller 44 to roll against the inner wall of the groove 23, thereby reducing friction and improving the movement effect.
[0039] like Figures 3-6 As shown, a four-corner flanging forming mold is provided in another embodiment of the present disclosure. A return spring 24 is elastically installed between the inner side of the groove 23 and the upper side of the connecting plate 42. When the connecting plate 42 is located at the bottom of the groove 23, the return spring 24 is in the initial state.
[0040] In some examples, the upward movement of the connecting plate 42 compresses the return spring 24, causing the return spring 24 to deform. The return spring 24 releases its elastic potential energy, pushing the connecting plate 42 downward, thereby causing the push block 41 to move downward.
[0041] like Figures 1-2 As shown, a four-corner flanging forming mold is shown in another embodiment of the present disclosure. Side plates 12 are welded to both sides of the base 11, and a connecting base 13 is welded to the top of the side plates 12.
[0042] In some examples, the upper mold is moved downwards to fit against the lower mold by extending the output shaft of the cylinder into the interior of the connecting base 13.
[0043] Working principle and usage process of this utility model:
[0044] During the production of automotive body panels, the automotive body panel (such as the inner door panel or fender) is precisely placed on the upper positioning pin of the lower mold 2, ensuring that it is completely fitted with the surface of the lower mold forming block 21. After the flanging and shaping operation, the electric air pump 31 is started, which fills the airbag 34 with compressed air through the air pipe 35. This demolding system is specifically designed to solve the mold sticking problem caused by material springback in automotive body panels (especially deep cavity structural parts). At this time, the valve 36 is in the open state, and the airbag 34... During inflation, the airbag 34 expands, increasing its vertical height. This pushes the pusher block 41, causing it to move the automotive body panel upwards, thus separating it from the lower mold forming block 21 and achieving demolding. After demolding, the electric air pump 31 initiates an exhaust process, completely withdrawing the gas within 2-3 seconds, allowing the airbag 34 to return to its original shape. This process is smoother than traditional push-rod demolding methods and is particularly suitable for the production of easily deformable parts such as aluminum alloy hoods. The entire system, controlled by a PLC, can be linked with a stamping press, significantly increasing the production cycle time of automotive body panels and greatly improving production efficiency. After the pusher block 41 returns to its original position, the robotic arm can automatically pick up the part, preparing it for subsequent laser cutting or welding processes.
[0045] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
[0047] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.
Claims
1. A four-corner flanging forming mold, comprising a mold (1), characterized in that: The mold (1) includes a base (11), a lower mold (2) is provided above the base (11), a demolding mechanism (4) is provided inside the lower mold (2), a long groove (14) is provided on the upper side of the base (11), a lifting mechanism (3) is provided inside the long groove (14), the lower mold (2) includes a lower mold forming block (21), a through groove (22) is provided on the surface of the lower mold forming block (21), the lifting mechanism (3) includes a push block (41) slidably installed inside the through groove (22), the lifting mechanism (3) includes a rectangular plate (32) bolted inside the long groove (14), a rectangular groove (33) is provided on the upper side of the rectangular plate (32), and an airbag (34) is placed inside the rectangular groove (33).
2. The four-corner flanging forming mold according to claim 1, characterized in that: The through groove (22) has grooves (23) on both sides, and the push block (41) has connecting plates (42) that are slidably connected inside the grooves (23) welded to both sides.
3. The four-corner flanging forming mold according to claim 2, characterized in that: The connecting plate (42) is welded to the outside of the mounting block (43), and rollers (44) are rotatably mounted at both ends of the mounting block (43).
4. The four-corner flanging forming mold according to claim 3, characterized in that: A reset spring (24) is elastically installed between the inner side of the groove (23) and the upper side of the connecting plate (42). When the connecting plate (42) is located at the bottom of the groove (23), the reset spring (24) is in the initial state.
5. A four-corner flanging forming mold according to claim 1, characterized in that: Side plates (12) are welded to both sides of the base (11), and a connecting base (13) is welded to the top of the side plates (12).
6. The four-corner flanging forming mold according to claim 1, characterized in that: An electric air pump (31) is bolted to the front of the base (11), and an air pipe (35) is threaded onto the top of the electric air pump (31). The other end of the air pipe (35) passes through the interior of the rectangular groove (33) and is threaded to the front end of the airbag (34).
7. A four-corner flanging forming mold according to claim 6, characterized in that: A valve (36) is provided on the outside of the air pipe (35), and the valve (36) is electrically connected to the electric air pump (31).
8. A four-corner flanging forming mold according to claim 1, characterized in that: The width of the long groove (14) is equal to the width of the rectangular plate (32), and the width of the airbag (34) is equal to the width of the rectangular groove (33).
9. A four-corner flanging forming mold according to claim 1, characterized in that: The width of the through groove (22) is equal to the width of the long groove (14), and the width of the push block (41) is greater than the width of the airbag (34).
10. A four-corner flanging forming mold according to claim 7, characterized in that: When the electric air pump (31) is pumping or filling air, the valve (36) is in the open state, and when the electric air pump (31) stops, the valve (36) is in the closed state.