Automobile sunroof guide rail support forming die with good flatness

Abstract

The utility model relates to the technical field of mould processing, concretely relates to a good flatness's automobile sunroof guide rail support forming die, including upper die and lower die, be provided with upper forming male die on the upper die, be installed with forming insert fixed plate in the lower die, the position of forming insert fixed plate in the upper forming male die is opened with insert fixed groove, is equipped with inner knock out insert in the insert fixed groove, the first clamping piece is equipped with in insert fixed groove bottom, the sliding slot is opened in the inner knock out insert, the second clamping piece is slidably connected in the sliding slot, the guide rod is equipped with in the sliding slot, the guide slot is opened in the second clamping piece, the guide rod is inserted in the guide slot, the reset spring is sheathed in the guide rod, when the inner knock out insert is installed in the insert fixed groove, the first clamping piece and the second clamping piece are the clamping state, the insert through groove is equipped with in the inner knock out insert, the lower forming male die is movably arranged in the insert through groove. The application effectively improves the efficiency of changing type.

Description

Technical Field

[0001] This utility model relates to the field of mold processing technology, specifically to a molding mold for a car sunroof guide rail bracket with good flatness. Background Technology

[0002] As a key component of the automotive sunroof system, the flatness of the sunroof guide rail bracket and the straightness of the guide rail directly affect the smoothness and stability of the sunroof's operation, requiring extremely high machining precision. Traditional molds use a one-piece lower mold insert structure, which, while meeting basic forming requirements, has significant drawbacks in practical applications: Firstly, when the sunroof guide rail bracket product requires local structural adjustments or mold inserts need adaptation, because the insert is not detachable, the entire insert must be lowered, polished, and ground, resulting in a complex, time-consuming, and labor-intensive adjustment process. Secondly, the one-piece structure lacks flexibility, making it impossible to precisely correct localized problems, leading to material waste and a significant increase in production costs.

[0003] Chinese Patent Publication No. CN222307012U discloses a molding die for an automotive sunroof guide rail bracket. The upper forming punch of the upper die and the lower forming insert assembly of the lower die cooperate to complete the stamping process. The lower forming insert assembly consists of an inner ejector block and a lower forming insert movably disposed in its insert slot. During die closing, the upper forming punch presses down on the material plate, and the lower ejector spring lifts the lower forming insert via a lower ejector rod, causing the material plate to adhere tightly to the lower forming insert. As the upper die continues to press down, the lower forming insert is pressed into the insert slot of the inner ejector block. Through the cooperation of the lower forming radius (R-angle) with the upper forming radius (R-angle), and the lower forming boss with the upper forming countersunk platform, the bending edge and mounting boss of the product are formed. During die opening, the upper die moves upward, and the lower ejector spring pushes the lower ejector rod to push the lower forming insert out of the insert slot, causing the product to detach from the inner ejector block. A limiting block restricts the material plate offset via a limiting boss, and a positioning pin passes through the lower positioning hole of the material plate to ensure the forming position accuracy. After demolding, the material plate is sent to the subsequent workstation to complete processes such as trimming and punching. However, the connections between the various components in this device are all fixed by fixed pins. Although this fixing method can ensure a stable connection, it also increases the difficulty of replacing components and makes it inconvenient to change the model.

[0004] Therefore, the present invention aims to provide a molding die for a car sunroof guide rail bracket with good flatness to solve the above problems. Utility Model Content

[0005] To address the aforementioned issues, a high-flatness automotive sunroof guide rail bracket forming mold is provided. Through a detachable snap-fit ​​mechanism and a return spring, the difficulty of replacing components in traditional molds is solved. Specifically, a snap-fit ​​block, sliding block, and guide rod between the inner release insert and the forming insert fixing plate, along with the elastic constraint of the return spring, maintain stable snap-fit ​​during normal stamping, ensuring the rigidity and flatness of the forming surface. During replacement, external force drives the sliding block to displace from the snap-fit ​​range, enabling rapid disassembly of the inner release insert. The return spring automatically resets and relocks. This design balances production stability and maintenance convenience, avoiding the cumbersome disassembly and assembly of traditional fixing pins, significantly improving mold changeover efficiency and continuous operation reliability.

[0006] To address the existing technical problems, this utility model provides a molding die for a car sunroof guide rail bracket with good flatness, including an upper die and a lower die. The upper die is provided with an upper forming punch, and the lower die is equipped with a forming insert fixing plate. The forming insert fixing plate has an insert fixing groove at a position relative to the upper forming punch. An inner ejector insert is provided in the insert fixing groove. A first locking block is provided at the bottom of the insert fixing groove. A sliding groove is provided on the inner ejector insert. A second locking block is slidably connected in the sliding groove. A guide rod is provided in the sliding groove. A guide groove is provided on the second locking block. The guide rod is inserted into the guide groove. A return spring is sleeved on the guide rod. When the inner ejector insert is installed in the insert fixing groove, the first locking block and the second locking block are in a locked state. An insert through groove is provided in the inner ejector insert. A lower forming punch is movably arranged in the insert through groove. The upper forming punch and the lower forming punch cooperate to stamp the product.

[0007] Preferably, the lower mold is provided with a stripping spring, the bottom of the lower mold is provided with a support plate, the spring is fixedly connected to the support plate, the upper end of the stripping spring is connected to a lifting rod, and the lifting rod passes through the forming insert fixing plate and the inner stripping insert from bottom to top and abuts against the lower forming punch.

[0008] Preferably, the lower mold has guide rails at both ends of its top, and the molding insert fixing plate has movable grooves at both ends of its bottom that are adapted to the guide rails, with the guide rails inserted into the movable grooves.

[0009] Preferably, the molding insert fixing plate has fixing slots at both ends and on the lower mold. When the molding insert fixing plate is installed on the lower mold via the guide rail, the fixing slots on both are in an overlapping state. At this time, a fixing pin is inserted into the fixing slot.

[0010] Preferably, the upper end of the inner insert is provided with several sets of limiting blocks for limiting the edge of the plate, the limiting blocks are arranged at intervals along the edge of the plate, and the upper forming punch is provided with several sets of clearance grooves corresponding to the positions of the limiting blocks.

[0011] Preferably, a cylinder is installed on the top of the upper mold, and the output shaft of the cylinder is connected to a telescopic rod. The end of the telescopic rod away from the cylinder is fixedly connected to the upper forming punch.

[0012] Preferably, the lower mold has four supporting columns at its four corners, and the end of the column away from the lower mold is fixedly connected to the upper mold.

[0013] Preferably, the upper forming punch is fixedly connected to the four corners of the sleeve, and the sleeve is sleeved on the column.

[0014] The advantages of this utility model compared to the prior art are:

[0015] 1. This utility model achieves rapid assembly and disassembly of the inner insert block within the insert fixing groove through a spring-reset locking mechanism between the first and second locking blocks. During normal stamping, the reset spring maintains the locking, ensuring no displacement of the inner insert block; during replacement, external force pushes the second locking block to slide out of the locking, eliminating the need to disassemble the fixing pin, significantly improving changeover efficiency and maintaining mold rigidity.

[0016] 2. This utility model adopts a demolding design that links the unloading spring and the lifting rod. After stamping, the unloading spring vertically lifts the forming punch through the lifting rod, so that the formed product is evenly removed from the cavity, avoiding local deformation or jamming caused by traditional rigid ejection, and improving demolding stability and product flatness.

[0017] 3. This utility model uses a composite structure of guide rail-moving groove positioning and sleeve-column guidance. When the mold is closed, the guide rail restricts the lateral displacement of the forming insert fixing plate, and the sleeve slides along the column to constrain the movement trajectory of the upper forming punch. With the radial locking of the fixing pin, the mold components are accurately aligned and the stamping pressure is dispersed, ensuring high precision of the forming surface and structural rigidity. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of a molding die for a car sunroof guide rail bracket with good flatness according to this utility model.

[0019] Figure 2 This is a front view of a molding die for a car sunroof guide rail bracket with good flatness according to this utility model.

[0020] Figure 3 This is a three-dimensional schematic diagram of the lower mold of a car sunroof guide rail bracket forming mold with good flatness according to this utility model.

[0021] Figure 4 This is an exploded view of the lower mold of a molding die for a car sunroof guide rail bracket with good flatness, according to this utility model.

[0022] Figure 5This is a partial sectional view of a molding die for a car sunroof guide rail bracket with good flatness according to this utility model.

[0023] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle.

[0024] Figure 7 This is a three-dimensional schematic diagram of the second snap-fit ​​block of a molding die for a car sunroof guide rail bracket with good flatness according to this utility model.

[0025] Figure 8 This is a three-dimensional schematic diagram of the upper forming punch of a molding die for a car sunroof guide rail bracket with good flatness according to this utility model.

[0026] The following are the labels in the diagram: 1. Upper mold; 2. Lower mold; 3. Upper forming punch; 4. Forming insert fixing plate; 5. Insert fixing groove; 6. Inner ejector insert; 7. First locking block; 8. Sliding groove; 9. Second locking block; 10. Guide rod; 11. Guide groove; 12. Insert through groove; 13. Lower forming punch; 14. Unloading spring; 15. Support plate; 16. Lifting rod; 17. Guide rail; 18. Moving groove; 19. Fixing slot; 20. Limiting block; 21. Clearance groove; 22. Cylinder; 23. Column; 24. Sleeve. Detailed Implementation

[0027] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0028] Reference Figures 1-8 As shown: A molding die for a car sunroof guide rail bracket with good flatness includes an upper die 1 and a lower die 2. The upper die 1 is provided with an upper forming punch 3, and the lower die 2 is installed with a forming insert fixing plate 4. The forming insert fixing plate 4 has an insert fixing groove 5 at a position opposite to the upper forming punch 3. An inner release insert 6 is provided in the insert fixing groove 5. A first locking block 7 is provided at the bottom of the insert fixing groove 5. A sliding groove 8 is provided on the inner release insert 6, and a second locking block is slidably connected in the sliding groove 8. 9. A guide rod 10 is provided in the sliding groove 8, and a guide groove 11 is provided on the second snap-fit ​​block 9. The guide rod 10 is inserted into the guide groove 11, and a reset spring is sleeved on the guide rod 10. When the inner release insert 6 is installed in the insert fixing groove 5, the first snap-fit ​​block 7 and the second snap-fit ​​block 9 are in a snap-fit ​​state. The inner release insert 6 is provided with an insert through groove 12, and a lower forming punch 13 is movably arranged in the insert through groove 12. The upper forming punch 3 and the lower forming punch 13 cooperate to stamp the product.

[0029] In existing technologies, the connections between components are secured using fixed pins. While this method provides a stable connection, it also increases the difficulty of component replacement and hinders model changes. To address this issue, in this application, the return spring is in a naturally extended state in the initial state, and the second locking block 9 remains fixed in the sliding groove 8, ensuring that the first locking block 7 and the second locking block 9 are always in a stable locking state. When the upper die 1 presses down, the upper forming punch 3 and the lower forming punch 13 close, applying stamping pressure to the sheet metal. The material is formed within the cavity formed by the forming insert fixing plate 4, the inner release insert 6, and the lower forming punch 13. At this time, the locking effect of the locking state ensures that the inner release insert 6 does not shift within the insert fixing groove 5 of the forming insert fixing plate 4, and the lower forming punch 13 is precisely positioned within the insert through groove 12, thereby ensuring the rigidity of the die structure and the flatness of the forming surface during the stamping process.

[0030] When the upper die 1 returns after stamping, the formed product and the inner ejector block 6 are ejected through the movable design of the lower forming punch 13, while the locking state of the first locking block 7 and the second locking block 9 is maintained by the return spring to ensure that the inner ejector block 6 does not retract within the insert fixing groove 5.

[0031] When the inner release insert 6 needs to be replaced, an external force is applied to the second locking block 9 via an external drive device or manual operation to overcome the elastic resistance of the return spring, forcing the second locking block 9 to slide along the sliding groove 8. The cooperation between the guide rod 10 and the guide groove 11 provides precise linear motion constraint. When the second locking block 9 is displaced from the locking range of the first locking block 7, the inner release insert 6 can be removed from the insert fixing groove 5. After replacement, the external force is removed, and the return spring pushes the second locking block 9 to reset, re-forming a locking connection with the first locking block 7. This mechanism is triggered only during maintenance, avoiding the risk of misoperation during normal production cycles. At the same time, the self-recovering characteristic of the return spring ensures the long-term reliability of the locking mechanism, ultimately achieving high-precision and high-stability continuous operation of the mold.

[0032] Reference Figures 1-5 As shown: The lower mold 2 is provided with a stripping spring 14, and the bottom of the lower mold 2 is provided with a support plate 15. The spring is fixedly connected to the support plate 15. The upper end of the stripping spring 14 is connected to a lifting rod 16. The lifting rod 16 passes through the forming insert fixing plate 4 and the inner stripping insert 6 from bottom to top and abuts against the lower forming punch 13.

[0033] During the stamping process, after the upper die 1 returns to its original position after forming, the unloading spring 14 installed at the bottom of the lower die 2 drives the lifting rod 16 to move upward through its elastic restoring force. Since the lower end of the unloading spring 14 is fixedly connected to the support plate 15, and the upper end passes through the forming insert fixing plate 4 and the inner ejector block 6 sequentially from bottom to top via the lifting rod 16, finally abutting against the bottom surface of the lower forming punch 13, the upward thrust of the lifting rod 16 directly acts on the lower forming punch 13, forcing the lower forming punch 13 to rise vertically within the insert through slot 12. This action smoothly ejects the formed product from the cavity of the inner ejector block 6. Simultaneously, the elastic stroke of the unloading spring 14 can adjust the lifting height of the lifting rod 16, ensuring uniform force distribution during product demolding and preventing localized deformation or jamming.

[0034] Reference Figure 4 As shown: The lower mold 2 is provided with guide rails 17 at both ends of the top, and the molding insert fixing plate 4 is provided with moving grooves 18 at both ends of the bottom that are adapted to the guide rails 17. The guide rails 17 are inserted into the moving grooves 18.

[0035] When installing or replacing the molding insert fixing plate 4, the molding insert fixing plate 4 is positioned by interlocking with the guide rails 17 set at both ends of the top of the lower mold 2 through the moving grooves 18 opened at both ends of the bottom. The guide rails 17 are embedded in the moving grooves 18 with a straight structure, which restricts the lateral displacement and rotational freedom of the molding insert fixing plate 4 in the horizontal plane, ensuring that the molding insert fixing plate 4 and the upper molding punch 3 of the upper mold 1 always maintain a vertical alignment relationship when the mold is closed.

[0036] Reference Figures 1-5 As shown: The molding insert fixing plate 4 has fixing slots 19 at both ends and on the lower mold 2. When the molding insert fixing plate 4 is installed on the lower mold 2 via the guide rail 17, the fixing slots 19 on the two are in an overlapping state. At this time, a fixing pin is inserted into the fixing slot 19.

[0037] During the installation of the molding insert fixing plate 4 onto the lower mold 2 via the guide rail 17, once the moving groove 18 at the bottom of the molding insert fixing plate 4 is fully fitted into the guide rail 17 at the top of the lower mold 2, the fixing slots 19 at both ends of the molding insert fixing plate 4 completely coincide with the corresponding fixing slots 19 on the lower mold 2 in the axial direction. At this time, the operator inserts the fixing pin vertically along the axial direction of the coinciding fixing slots 19, and uses the interference fit between the cylindrical outer surface of the fixing pin and the inner wall of the fixing slot 19 to achieve radial rigid locking between the molding insert fixing plate 4 and the lower mold 2.

[0038] Reference Figures 4-8 As shown: The upper end of the inner insert 6 is provided with several sets of limiting blocks 20 for limiting the edge of the plate. The limiting blocks 20 are arranged at intervals along the edge of the plate. The upper forming punch 3 is provided with several sets of clearance grooves 21 corresponding to the positions of the limiting blocks 20.

[0039] During the stamping process, several sets of limiting blocks 20 installed on the upper end of the inner ejector block 6 form multi-point rigid constraints on the edge of the sheet metal placed between the inner ejector block 6 and the lower forming punch 13 through a layout that is spaced along the edge of the sheet metal. When the sheet metal is placed into the mold cavity, the vertical side of the limiting block 20 contacts the edge of the sheet metal, restricting the lateral movement or rotation of the sheet metal in the horizontal plane, ensuring that the sheet metal maintains a preset alignment relationship with the forming surfaces of the lower forming punch 13 and the inner ejector block 6 before stamping.

[0040] Reference Figure 1 and Figure 2 As shown: A cylinder 22 is installed on the top of the upper mold 1. The output shaft of the cylinder 22 is connected to a telescopic rod. The end of the telescopic rod away from the cylinder 22 is fixedly connected to the upper forming punch 3.

[0041] During the die-clamping stage, cylinder 22 drives the telescopic rod to push the upper forming punch 3 vertically downward, closing it with the lower forming punch 13 to form a closed cavity. At this time, the clearance groove 21 of the upper forming punch 3 and the limiting block 20 of the inner ejector block 6 maintain a clearance fit to avoid interference. The stamping force is applied to the sheet metal through the rigid transmission of the telescopic rod. After stamping is completed, the piston of cylinder 22 drives the telescopic rod and the upper forming punch 3 to retract at a uniform speed to avoid rapid separation that could cause the formed product to be deformed by adhesion.

[0042] Reference Figures 1-8 As shown: The lower mold 2 has four supporting columns 23 at its four corners, and the end of the column 23 away from the lower mold 2 is fixedly connected to the upper mold 1.

[0043] During the die-pressing stage, the column 23, as the main load-bearing component, vertically disperses the pressing force transmitted by the upper die 1 to the lower die 2 and the frame foundation through the column 23 body, thus avoiding structural deformation caused by local stress concentration.

[0044] Reference Figures 1-8 As shown: The upper forming punch 3 is fixedly connected to the four corners of the sleeve 24, and the sleeve 24 is sleeved on the column 23.

[0045] When the mold begins to close, the upper forming punch 3 moves downward, and the sleeves 24 fixed at its four corners slide smoothly along the outer surface of the column 23. The sleeves 24 and the column 23 cooperate to effectively limit the horizontal displacement of the upper forming punch 3, ensuring that the upper forming punch 3 and the cavity of the lower mold 2 are precisely aligned.

[0046] Working principle: During die closing and stamping, the cylinder 22 of the upper die 1 drives the telescopic rod to press down the upper forming punch 3, while the sleeve 24 slides along the column 23 to maintain vertical alignment. The forming insert fixing plate 4 of the lower die 2 is positioned by the guide rail 17 and the moving groove 18, and locked by the fixing pin. The inner release insert 6 is fixed by the locking state of the first locking block 7 and the second locking block 9, and the return spring maintains the lock. The upper forming punch 3 and the lower forming punch 13 close, and are stamped on the sheet metal constrained by the limiting block 20.

[0047] During the demolding stage, the unloading spring 14 pushes the lifting rod 16 to lift the lower forming punch 13, causing the formed product to disengage from the inner ejector block 6. When the upper mold 1 returns, the sleeve 24 resets along the column 23, and the locking state is still maintained by the reset spring.

[0048] When replacing the inner release insert 6, external force pushes the second locking block 9 to slide away from the first locking block 7 along the guide rod 10. After the locking is released, the inner release insert 6 can be removed. After replacement, the reset spring automatically restores the locking. The column 23 distributes the punching pressure throughout the entire process, and the sleeve 24 maintains the movement trajectory of the upper die 1 to ensure the flatness of the forming surface.

[0049] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A molding die for a car sunroof guide rail bracket with good flatness, comprising an upper die (1) and a lower die (2), characterized in that, The upper mold (1) is provided with an upper forming punch (3), and the lower mold (2) is provided with a forming insert fixing plate (4). The forming insert fixing plate (4) is provided with an insert fixing groove (5) at a position relative to the upper forming punch (3). The insert fixing groove (5) is provided with an inner release insert (6). The bottom of the insert fixing groove (5) is provided with a first snap-fit ​​block (7). The inner release insert (6) is provided with a sliding groove (8). The sliding groove (8) is slidably connected with a second snap-fit ​​block (9). The sliding groove (8) is provided with a guide rod (10). The second snap-fit ​​block (9) has a guide groove (11) and the guide rod (10) is inserted into the guide groove (11). A reset spring is sleeved on the guide rod (10). When the inner snap-fit ​​block (6) is installed in the insert fixing groove (5), the first snap-fit ​​block (7) and the second snap-fit ​​block (9) are snap-fitted. The inner snap-fit ​​block (6) has an insert through groove (12). The insert through groove (12) has a lower forming punch (13) that is movably arranged in the insert through groove (12). The upper forming punch (3) and the lower forming punch (13) cooperate to stamp the product.

2. The molding die for a car sunroof guide rail bracket with good flatness according to claim 1, characterized in that, The lower mold (2) is provided with a material unloading spring (14), and the bottom of the lower mold (2) is provided with a support plate (15). The spring is fixedly connected to the support plate (15). The upper end of the material unloading spring (14) is connected to a lifting rod (16). The lifting rod (16) passes through the forming insert fixing plate (4) and the inner unloading insert (6) from bottom to top and abuts against the lower forming punch (13).

3. The molding die for a car sunroof guide rail bracket with good flatness according to claim 1, characterized in that, The lower mold (2) has guide rails (17) at both ends of its top, and the molding insert fixing plate (4) has movable grooves (18) at both ends of its bottom that are adapted to the guide rails (17). The guide rails (17) are inserted into the movable grooves (18).

4. The molding die for a car sunroof guide rail bracket with good flatness according to claim 3, characterized in that, The molding insert fixing plate (4) has fixing slots (19) at both ends and on the lower mold (2). When the molding insert fixing plate (4) is installed on the lower mold (2) via the guide rail (17), the fixing slots (19) on the two are in an overlapping state. At this time, a fixing pin is inserted into the fixing slot (19).

5. The molding die for a car sunroof guide rail bracket with good flatness according to claim 1, characterized in that, The upper end of the inner insert (6) is provided with several sets of limiting blocks (20) for limiting the edge of the plate. The limiting blocks (20) are arranged at intervals along the edge of the plate. The upper forming punch (3) is provided with several sets of clearance grooves (21) corresponding to the positions of the limiting blocks (20).

6. The molding die for a car sunroof guide rail bracket with good flatness according to claim 1, characterized in that, A cylinder (22) is installed on the top of the upper mold (1). The output shaft of the cylinder (22) is connected to a telescopic rod. The end of the telescopic rod away from the cylinder (22) is fixedly connected to the upper forming punch (3).

7. The molding die for a car sunroof guide rail bracket with good flatness according to claim 6, characterized in that, The lower mold (2) has four corners with support columns (23), and the end of the column (23) away from the lower mold (2) is fixedly connected to the upper mold (1).

8. The molding die for a car sunroof guide rail bracket with good flatness according to claim 6, characterized in that, The upper forming punch (3) has sleeves (24) fixedly connected to its four corners, and the sleeves (24) are sleeved on the column (23).

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