Automobile tail lamp forming die

Abstract

The utility model provides a kind of automobile tail light forming die, it is related to automobile production technical field, including connecting plate and bottom plate, the lower surface of connecting plate installs top plate, the lower surface of top plate has upper die, the lower end of upper die is equipped with forming block, the upper surface of bottom plate is equipped with lower die.The utility model in this paper sets up temporary storage box and nitrogen cylinder in the inside of placing groove, and the output end of nitrogen cylinder is connected with the four around of forming block in the inside one end of placing groove, when forming block and forming groove cooperate to form material, nitrogen cylinder can provide uniform edge pressure to the four around of forming block, this adjustable series type nitrogen cylinder structure can effectively solve the problem of uneven stress of material caused by lack of uniform edge positioning structure in traditional mould, avoid material deviation, wrinkle and other conditions in the process of forming, so as to ensure the size precision of tail lamp product after forming, high surface flatness, improve the quality of product.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, and more specifically, to an automobile taillight forming mold. Background Technology

[0002] Automotive taillights are a general term for the rear lighting and signaling system of a vehicle, consisting of multiple functional lights, mainly serving the functions of warning, indication, and illumination. When producing taillights, molding dies are often required for forming. For example, application number "CN201720534984.0" proposes an automotive taillight base mold, including a mold base with a lower mold and an upper mold. The upper mold has a cavity on the upper surface of the forming body, and the lower mold has a core on the lower surface of the forming body. A first mounting groove is provided near the core in the lower mold, and a first cooling block is installed in the first mounting groove. A second mounting groove is provided in the upper mold, and a second cooling block is installed in the second mounting groove. The first cooling block has a first cooling water inlet and a first cooling water outlet, which are connected to a first cooling channel. The second cooling block has a second cooling water inlet and a second cooling water outlet, which are connected to a second cooling channel.

[0003] However, although the above technical solution achieves mold cooling through the first cooling block, the second cooling block and the corresponding cooling channels, which improves the molding efficiency to a certain extent, the lack of a uniform pressing and positioning structure between the upper mold cavity and the lower mold core during the molding process makes the material prone to displacement and wrinkling due to uneven force during molding. This results in defects such as dimensional deviation and insufficient surface flatness in the molded taillight product. Therefore, we propose an automotive taillight molding mold to solve the above problems. Utility Model Content

[0004] The main purpose of this utility model is to provide a molding die for automotive taillights. It solves the problem that although the mold is cooled by the first cooling block, the second cooling block and the corresponding cooling channels, which improves the molding efficiency to a certain extent, the lack of a uniform pressing and positioning structure between the upper mold cavity and the lower mold core during the molding process leads to uneven force on the material, causing it to shift and wrinkle. As a result, the molded taillight products have defects such as dimensional deviation and insufficient surface flatness.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A molding die for an automotive taillight includes a connecting plate and a base plate. A top plate is mounted on the lower surface of the connecting plate, and an upper mold is mounted on the lower surface of the top plate. A molding block is mounted on the lower end of the upper mold. A lower mold is mounted on the upper surface of the base plate, and a molding groove is provided on the upper end of the lower mold. The upper mold and the lower mold are fitted together, and the molding block is engaged inside the molding groove. A placement groove is provided through the interior of the upper mold, and the molding block is engaged inside the placement groove. Several temporary storage boxes are installed inside the placement groove. Nitrogen cylinders are respectively installed on the end of each temporary storage box near the molding block, and the nitrogen cylinders are connected to the temporary storage boxes. The output end of the nitrogen cylinder is connected to the perimeter of the molding block at the end inside the placement groove.

[0007] Preferably, a plurality of connecting seats are installed on the side of the top plate near the forming block, and positioning rods are respectively installed on the side of the connecting seats near the forming block. Placement blocks are respectively installed on the side of the bottom plate near the lower mold. The placement blocks correspond one-to-one with the connecting seats and overlap vertically. Positioning sleeves are respectively installed inside the placement blocks, and the rods of the positioning rods are respectively engaged and installed inside the positioning sleeves.

[0008] Preferably, a plurality of first balancing blocks are installed on the side of the upper mold away from the top plate, and a plurality of second balancing blocks are installed on the side of the bottom plate close to the forming block. The second balancing blocks correspond one-to-one with the first balancing blocks and overlap vertically.

[0009] Preferably, a number of limiting frames are installed on the side of the molding block away from the temporary storage box, and a number of limiting grooves are provided inside the molding groove and at the end away from the bottom plate. The limiting frames and limiting grooves correspond one-to-one and are engaged.

[0010] Preferably, an air guide pipe is installed inside the placement slot, and the air guide pipe is connected to the temporary storage box.

[0011] Preferably, a connecting pipe is installed through the rear end of the placement slot, and one end of the connecting pipe inside the placement slot is connected through to the temporary storage box.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) In this utility model, a temporary storage box and a nitrogen cylinder are set inside the placement groove, and the output end of the nitrogen cylinder is connected to the periphery of the molding block located inside the placement groove. When the molding block and the molding groove cooperate to form the material, the nitrogen cylinder can provide uniform pressing force to the periphery of the molding block. This adjustable series nitrogen cylinder structure can effectively solve the problem of uneven material force caused by the lack of uniform pressing and positioning structure in traditional molds, and avoid the material from shifting or wrinkling during the molding process, thereby ensuring that the taillight product after molding has accurate dimensions and high surface flatness, and improving the quality of the product.

[0014] (2) In this utility model, by setting a matching structure of positioning rod and positioning sleeve, the positioning rod is locked inside the positioning sleeve during the mold closing process, which can realize the precise positioning of the upper mold and the lower mold and prevent misalignment during mold closing. At the same time, the first balance block and the second balance block correspond one-to-one and overlap vertically, which can enhance the stability of the upper mold and the lower mold during mold closing and further ensure the molding effect. In addition, the limiting frame on the molding block is locked to the limiting groove in the molding groove, which can more stably limit the material during the molding process, reduce the displacement of the material, ensure the molding accuracy of the taillight product, and meet the high precision and high quality production requirements of automotive taillights. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall front view structure of an automotive taillight molding die according to the present invention;

[0016] Figure 2 This is a schematic diagram of the overall structure of the connecting plate and the upper mold of an automobile taillight forming mold according to this utility model;

[0017] Figure 3 This is a schematic diagram of the overall structure of the base plate and lower mold of an automobile taillight forming mold according to this utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of the top plate and upper mold of an automobile taillight forming mold according to the present invention.

[0019] Figure 5 This is a front view structural diagram of the top plate and upper mold of an automobile taillight forming mold according to the present invention.

[0020] Figure 6 This utility model relates to a molding die for automotive taillights. Figure 5 Schematic diagram of the cross-sectional structure at point AA.

[0021] In the diagram: 1. Connecting plate; 2. Top plate; 3. Positioning rod; 4. Connecting seat; 5. Lower mold; 6. Upper mold; 7. Forming block; 8. Limiting frame; 9. First balance block; 10. Placement groove; 11. Temporary storage box; 12. Nitrogen cylinder; 13. Air guide pipe; 14. Connecting pipe; 15. Base plate; 16. Placement block; 17. Positioning sleeve; 18. Second balance block; 19. Forming groove; 20. Limiting groove. Detailed Implementation

[0022] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0023] like Figures 1 to 6 As shown in the figure, this utility model embodiment proposes an automotive taillight forming mold, including a connecting plate 1 and a base plate 15. A top plate 2 is installed on the lower surface of the connecting plate 1, and an upper mold 6 is provided on the lower surface of the top plate 2. A forming block 7 is installed at the lower end of the upper mold 6. A lower mold 5 is installed on the upper surface of the base plate 15. A forming groove 19 is provided at the upper end of the lower mold 5. The upper mold 6 and the lower mold 5 are closely connected, and the forming block 7 is engaged inside the forming groove 19. A placement groove 10 is provided through the interior of the upper mold 6. The forming block 7 is engaged inside the placement groove 10. A plurality of temporary storage boxes 11 are installed inside the placement groove 10. A nitrogen cylinder 12 is installed at one end of the temporary storage box 11 near the forming block 7, and the nitrogen cylinder 12 is connected to the temporary storage box 11. The output end of the nitrogen cylinder 12 is connected to the periphery of the forming block 7 located inside the placement groove 10.

[0024] like Figures 2 to 6As shown, in another embodiment of this utility model, a plurality of connecting seats 4 are installed on the side of the top plate 2 near the forming block 7, and positioning rods 3 are respectively installed on the side of the connecting seats 4 near the forming block 7. Placement blocks 16 are respectively installed on the side of the bottom plate 15 near the lower mold 5. The placement blocks 16 correspond one-to-one with the connecting seats 4 and overlap vertically. Positioning sleeves 17 are respectively installed inside the placement blocks 16, and the rods of the positioning rods 3 are respectively engaged and installed inside the positioning sleeves 17. A plurality of first balance blocks 9 are installed on the side of the upper mold 6 away from the top plate 2, and a plurality of second balance blocks 9 are installed on the side of the bottom plate 15 near the forming block 7. Two balancing blocks 18, the second balancing block 18 and the first balancing block 9 are one-to-one and overlap vertically, the forming block 7 is equipped with several limiting brackets 8 on the side away from the temporary storage box 11, the forming groove 19 is provided with several limiting grooves 20 inside and away from the bottom plate 15, the limiting brackets 8 and the limiting grooves 20 are one-to-one and are engaged, the placement groove 10 is equipped with an air guide pipe 13 inside, the air guide pipe 13 is connected to the temporary storage box 11, the rear end of the placement groove 10 is connected to the temporary storage box 11.

[0025] The moving template causes the top plate 2 and upper mold 6 to move downwards. The positioning rod 3 of the connecting seat 4 on the top plate 2 is gradually inserted into the positioning sleeve 17 of the block 16 on the bottom plate 15 to achieve initial positioning. Then, the first balance block 9 of the upper mold 6 and the second balance block 18 of the bottom plate 15 are engaged to complete the final mold closing and positioning, so that the molding block 7 and the molding groove 19 are precisely aligned. At the same time, during this process, the limiting frame 8 on the molding block 7 is engaged into the limiting groove 20 of the molding groove 19 to further fix the shape of the cavity. Then, the injection molding machine nozzle injects the molten material into the cavity formed by the closing of the upper mold 6 and the lower mold 5. The cavity is formed by the cooperation of the molding block 7 and the molding groove 19. Under pressure, the material fills the cavity. Then, the injection molding machine maintains a certain pressure for pressure holding, and at the same time, nitrogen is introduced into the temporary storage box 11 in the placement groove 10 through the air guide pipe 13 or the connecting pipe 14. The temporary storage box 11 delivers nitrogen to the nitrogen cylinder 12. The nitrogen cylinder 12 applies a uniform pressing force to the periphery of the molding block 7 to ensure that the material is tightly attached to the inner wall of the cavity and to avoid defects such as shrinkage marks and depressions caused by insufficient pressure. After the pressure holding is completed, the injection molding is stopped and cooled. After the material solidifies and is formed, the nitrogen cylinder 12 is depressurized, the injection molding machine drives the upper mold 6 to move upward, the positioning rod 3 is pulled out from the positioning sleeve 17, the molding block 7 is removed from the molding groove 19, the molded car taillight product is taken out, and the mold is reset to wait for the next injection molding.

[0026] The positioning rod 3 and the positioning sleeve 17 work together with the connecting seat 4 and the placement block 16 to achieve millimeter-level positioning accuracy, preventing cavity deviation caused by mold misalignment. The fit between the first balance block 9 and the second balance block 18 reduces the lateral force during mold closing, protects the mold structure, and extends the service life.

[0027] The uniform pressing force provided by the nitrogen cylinder 12 is stably supplied through the temporary storage box 11, the air guide pipe 13, and the connecting pipe 14. This can compensate for the local pressure deficiency in the pressure holding of the injection molding machine, prevent the material from shrinking and deforming due to cooling and shrinkage, ensure that the taillight surface is flat and smooth, and the adjustable nitrogen pressure can adapt to different material characteristics and improve the mold versatility.

[0028] After the nitrogen cylinder 12 is depressurized, the smooth separation of the molding block 7 and the molding groove 19 reduces the pulling on the product during demolding, reducing the risk of product scratches and breakage. The guiding effect of the positioning rod 3 and the positioning sleeve 17 ensures that the mold does not collide during demolding, improving production safety and continuity.

[0029] The working principle of this type of automotive taillight molding die:

[0030] In use, the template is first moved to lower the top plate 2 and the upper mold 6. The positioning rod 3 of the connecting seat 4 on the top plate 2 is gradually inserted into the positioning sleeve 17 of the block 16 on the bottom plate 15 to achieve initial positioning. Then, the first balance block 9 of the upper mold 6 and the second balance block 18 of the bottom plate 15 are engaged to complete the final mold closing and positioning, so that the molding block 7 and the molding groove 19 are precisely aligned. At the same time, the limiting frame 8 on the molding block 7 is engaged into the limiting groove 20 of the molding groove 19 to further fix the shape of the cavity. Then, the injection molding machine nozzle injects the molten material into the cavity formed by the closing of the upper mold 6 and the lower mold 5. The cavity is formed by the cooperation of the molding block 7 and the molding groove 19. The material fills the cavity under pressure. The injection molding machine maintains a certain pressure for pressure holding, while nitrogen gas is introduced into the temporary storage box 11 in the placement groove 10 through the air guide pipe 13 or connecting pipe 14. The temporary storage box 11 delivers nitrogen gas to the nitrogen cylinder 12. The nitrogen cylinder 12 applies a uniform pressing force to the periphery of the molding block 7 to ensure that the material is tightly attached to the inner wall of the cavity and to avoid defects such as shrinkage marks and depressions caused by insufficient pressure. After the pressure holding is completed, the injection molding is stopped and the material is cooled. After the material solidifies and is formed, the nitrogen cylinder 12 is depressurized, the injection molding machine drives the upper mold 6 to move upward, the positioning rod 3 is pulled out from the positioning sleeve 17, the molding block 7 is removed from the molding groove 19, the molded car taillight product is taken out, and the mold is reset to wait for the next injection molding.

[0031] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A molding die for an automobile taillight, comprising a connecting plate (1) and a base plate (15), characterized in that: A top plate (2) is installed on the lower surface of the connecting plate (1). An upper mold (6) is provided on the lower surface of the top plate (2). A forming block (7) is installed at the lower end of the upper mold (6). A lower mold (5) is installed on the upper surface of the bottom plate (15). A forming groove (19) is provided at the upper end of the lower mold (5). The upper mold (6) and the lower mold (5) are closely connected. The forming block (7) is engaged inside the forming groove (19). A placement groove (10) is provided through the interior of the upper mold (6). The forming block (7) is engaged inside the placement groove (10). Several temporary storage boxes (11) are installed inside the placement groove (10). A nitrogen cylinder (12) is installed at one end of the temporary storage box (11) near the forming block (7). The nitrogen cylinder (12) is connected to the temporary storage box (11). The output end of the nitrogen cylinder (12) is connected to the periphery of the forming block (7) located inside the placement groove (10).

2. The automotive taillight forming mold according to claim 1, characterized in that: The top plate (2) is equipped with several connecting seats (4) on the side near the forming block (7). The connecting seats (4) are equipped with positioning rods (3) on the side near the forming block (7). The bottom plate (15) is equipped with placement blocks (16) on the side near the lower mold (5). The placement blocks (16) correspond one-to-one with the connecting seats (4) and overlap vertically. The placement blocks (16) are equipped with positioning sleeves (17) inside. The rods of the positioning rods (3) are respectively engaged and installed inside the positioning sleeves (17).

3. The automotive taillight forming mold according to claim 1, characterized in that: The upper mold (6) is equipped with a number of first balance blocks (9) on the side away from the top plate (2), and the bottom plate (15) is equipped with a number of second balance blocks (18) on the side close to the forming block (7). The second balance blocks (18) correspond one-to-one with the first balance blocks (9) and overlap vertically.

4. The automotive taillight forming mold according to claim 1, characterized in that: The molding block (7) is equipped with several limiting frames (8) on the side away from the temporary storage box (11). The molding groove (19) is provided with several limiting grooves (20) at the end away from the bottom plate (15). The limiting frames (8) and the limiting grooves (20) correspond one to one and are engaged.

5. The automotive taillight forming mold according to claim 1, characterized in that: An air guide pipe (13) is installed inside the placement slot (10), and the air guide pipe (13) is connected to the temporary storage box (11).

6. The automotive taillight forming mold according to claim 5, characterized in that: A connecting pipe (14) is installed through the rear end of the placement slot (10), and one end of the connecting pipe (14) inside the placement slot (10) is connected through to the temporary storage box (11).

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