Injection mold for a car lamp cover

Abstract

This invention relates to the field of mold technology, specifically to an injection mold for an automotive lamp cover. The mold includes an upper mold with a core and a lower mold with a through-hole. A double-cavity flipping structure is rotatably connected within the slot. The lower mold contains a drive structure for rotating the double-cavity flipping structure. An ejector structure is located within the double-cavity flipping structure. When the double-cavity flipping structure rotates, it drives the ejector structure to move downwards and eject the injection-molded automotive lamp cover. The double-cavity flipping structure enables synchronous alternation between demolding and injection, shortening the production cycle and changing the traditional method of waiting for a single injection and demolding before proceeding to the next injection. This improves equipment utilization efficiency and effectively increases production efficiency.

Description

Technical Field

[0001] This invention relates to the field of mold technology, and specifically to an injection mold for an automotive lamp cover. Background Technology

[0002] In the automotive manufacturing industry, the production quality and efficiency of automotive lamp covers are crucial. Currently, in the actual production process of traditional automotive lamp cover injection molds, the injection and demolding processes are carried out sequentially. The next injection can only be performed after one injection and demolding is completed. This cannot fully utilize equipment resources and limits production efficiency. Moreover, in traditional injection molding processes, demolding and injection cannot be performed simultaneously, resulting in long equipment downtime and increased production costs. Furthermore, some molds require manual removal of products from the mold by workers, which is not only labor-intensive and increases labor costs but also inefficient and cannot meet the needs of large-scale production. Therefore, a new type of automotive lamp cover injection mold with a flip-up design is proposed. During the flipping process, demolding is achieved on one side while injection is performed on the other side. By continuously alternating between demolding and injection, continuous and efficient production can be achieved, improving production efficiency while reducing production costs. Summary of the Invention

[0003] To address the problems in the prior art, this invention provides an injection mold for automotive lamp covers, which adopts a flip-up design. During the flipping process, demolding is achieved on one side, while injection molding can be performed on the other side at the same time, thereby improving production efficiency and reducing production costs.

[0004] The technical solution adopted by the present invention to solve its technical problem is an injection mold for an automotive lamp cover, including an upper mold with a core and a lower mold with a through slot. A double-cavity flipping structure is rotatably connected in the slot. The lower mold is provided with a driving structure for driving the double-cavity flipping structure to rotate. The double-cavity flipping structure is provided with an ejector structure. When the double-cavity flipping structure rotates, it drives the ejector structure to move down and eject the injection-molded automotive lamp cover.

[0005] Specifically, the driving structure includes rotating shafts symmetrically arranged on both sides of the double-cavity flipping structure. The end of the rotating shaft away from the double-cavity flipping structure passes through the lower mold and is rotatably connected to the lower mold. The lower mold has an installation groove corresponding to one end of the rotating shaft. One end of the rotating shaft is located in the installation groove and is connected to a first gear through a one-way bearing. A vertically arranged driving rack is meshed on one side of the first gear. The lower end of the driving rack is fixedly connected to the bottom of the installation groove through a damping spring rod. The lower surface of the upper mold is provided with a pressing positioning structure. When the upper mold moves down, the pressing positioning structure presses the driving rack down.

[0006] Specifically, the extrusion positioning structure includes several sets of positioning holes on the lower mold, the upper end of the mounting groove is connected to the positioning holes, and several sets of positioning rods corresponding to the positioning holes are fixedly connected to the lower surface of the upper mold.

[0007] Specifically, the dual-cavity flipping structure includes a rotating template, the upper and lower surfaces of which are provided with cavities corresponding to the core, and the end of the rotating shaft away from the first gear is fixedly connected to one side of the rotating template.

[0008] Specifically, the rotating template is provided with an ejection structure, which includes a horizontally arranged sliding hole in the rotating template. The two ends of the sliding hole pass through a rotating shaft and a first gear, respectively. A fixed shaft is rotatably connected in the sliding hole. The two ends of the fixed shaft are fixedly connected to the mounting groove. The rotating template is provided with several sets of drive grooves communicating with the sliding hole. Several sets of downward-facing half teeth are fixedly connected to the fixed shaft. Each mounting groove is provided with two sets of vertically arranged ejector rods. The bottom of the cavity is provided with a sliding groove corresponding to the ejector rod. The ejector rod is slidably connected to the sliding groove. Both sides of the ejector rod are provided with toothed structures. The toothed structures mesh with the half teeth for transmission. In the initial state, the upper end of the ejector rod is flush with the bottom of the upper cavity and the lower end is inserted into the lower cavity. The mounting groove is provided with a reset component that drives the ejector rod to reset when the ejector rod and the half teeth disengage.

[0009] Specifically, the reset assembly includes connecting grooves disposed on both sides of the drive groove, a drive shaft is rotatably connected in the connecting groove, a second gear is fixedly connected on the drive shaft, the drive shaft is connected to the connecting groove through a torsion spring, and the second gear meshes with the tooth structure on the side of the top material rod away from the half tooth.

[0010] Specifically, the outer side of the lower mold is provided with a liquid inlet structure that communicates with the cooling liquid, and the double mold cavity flipping structure is provided with a circulation structure that communicates with the liquid inlet structure. The liquid inlet structure includes a first connector respectively provided on one side of the upper part of the lower mold and a second connector respectively provided on one side of the lower part of the lower mold. The lower mold is provided with a communication structure corresponding to the first connector and the second connector respectively. The connecting structure includes a first conical groove disposed inside the lower mold, a horizontally arranged flexible connecting pipe disposed inside the first conical groove, the connecting pipe being connected to a corresponding first connector and a second connector through a passage, a conical connector being connected to the end of the connecting pipe away from the passage, and a return spring being fixedly connected between the conical connector and the inner wall of the first conical groove.

[0011] Specifically, the circulation structure includes a circulation channel disposed inside the rotating template. Both ends of the circulation channel are provided with a second conical groove corresponding to the conical connector. The second conical groove is connected to the circulation channel. A magnet is disposed in the second conical groove. A sealing ring is fixedly connected to one side of the magnet. When the conical connector is located in the second conical groove, it is connected to the circulation channel.

[0012] Specifically, the upper mold has two sets of connecting joints on its outer side and a circulation passage inside the upper mold, with the two sets of connecting joints connected to both ends of the circulation passage.

[0013] Specifically, the inner walls of the slot away from the rotating shaft are provided with arc-shaped grooves on both sides that match the rotation range of the rotating template.

[0014] The beneficial effects of this invention are: The injection mold for an automotive lamp cover described in this invention achieves synchronous alternation between demolding and injection by relying on a dual-cavity flipping structure, which shortens the production cycle, changes the traditional mode of waiting for a single injection and demolding to be completed before the next injection, improves the utilization efficiency of the equipment, and effectively improves production efficiency.

[0015] The injection mold for an automotive lamp cover described in this invention features a downward-facing ejector rod that works in conjunction with a double-cavity flipping structure to meet the requirements of continuous production. When the product on one side is finished being injected and rotated to the bottom with the rotating mold plate, the ejector rod can promptly eject the product, seamlessly connecting with the injection operation performed simultaneously on the other side. This improves production efficiency and ensures the efficient operation of the production process.

[0016] The injection mold for an automotive lamp cover described in this invention features a liquid inlet structure on the outer side of the lower mold and a circulation structure within the double-cavity flipping structure. Through the circulation of cooling liquid, the injected plastic can be rapidly solidified, while simultaneously preheating the cavity on the lower surface of the lower mold, further improving overall production efficiency and convenience. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is an isometric view of the present invention; Figure 2 This is an isometric view of the present invention from another perspective; Figure 3 This is a side view of the present invention; Figure 4 This is a cross-sectional view of the lower mold portion of the present invention; Figure 5 for Figure 4 Enlarged view of region A; Figure 6This is a schematic cross-sectional view of the rotating template structure of the present invention; Figure 7 for Figure 6 Enlarged view of region B; Figure 8 This is a schematic diagram of the liquid inlet structure of the present invention; Figure 9 for Figure 8 Enlarged view of region C; Figure 10 This is a cross-sectional schematic diagram of the lower mold and rotating template of the present invention; Figure 11 for Figure 10 Enlarged view of region D; In the diagram: 1. Core; 2. Upper mold; 3. Groove; 4. Lower mold; 5. Rotating shaft; 6. Mounting groove; 7. One-way bearing; 8. First gear; 9. Drive rack; 10. Damping spring rod; 11. Positioning hole; 12. Positioning rod; 13. Rotating template; 14. Cavity; 15. Sliding hole; 16. Fixed shaft; 17. Drive groove; 18. Half tooth; 19. Ejector rod; 20. Slide groove; 21. Tooth structure; 22. Connecting groove; 23. Drive shaft; 24. Second gear; 25. Torsion spring; 26. First connector; 27. Second connector; 28. First conical groove; 29. ​​Connecting pipe; 30. Conical connector; 31. Return spring; 32. Circulation channel; 33. Second conical groove; 34. Magnet; 35. Sealing ring; 36. Connecting connector; 37. Arc groove. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] To improve production efficiency while reducing production costs, as one embodiment of the present invention, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the injection mold for an automotive lamp cover according to the present invention includes an upper mold 2 with a core 1, and a lower mold 4 with a through slot 3. A double-cavity flipping structure is rotatably connected in the slot 3. The lower mold 4 is provided with a driving structure for driving the double-cavity flipping structure to rotate. The double-cavity flipping structure is provided with an ejector structure. When the double-cavity flipping structure rotates, it drives the ejector structure to move down and eject the injection-molded automotive lamp cover.

[0021] During use, in the injection molding production of the lampshade, when the upper mold 2 is driven to move down to a specific position, one side of the upper mold 2 and the lower mold 4 are closed. At the same time, the core 1 of the upper mold 2 is embedded in one side of the double-cavity flipping structure. At this time, the core 1 and the double-cavity flipping structure can be injection molded. After the injection is completed and the plastic is cured, the upper mold 2 is driven to separate from the lower mold 4. After the upper mold 2 and the lower mold 4 are separated, the drive structure drives the double-cavity flipping structure to rotate in the slot 3. When the double-cavity flipping structure rotates to a certain position, the side that has been injection molded is located at the bottom, and the ejection structure will then... The solidified product is ejected; at the same time, the other side of the double-cavity flipping structure rotates to the top of the lower mold 4, corresponding to the upper mold 2 again, which can drive the upper mold 2 to move down and close with the lower mold 4, and then carry out the injection molding production of the next set of products. In this way, demolding is achieved on one side during the flipping process, and injection molding is carried out simultaneously on the other side. By alternating demolding and injection molding, continuous and efficient production is achieved, which not only improves production efficiency but also reduces production costs. In addition, the workpiece is automatically ejected after injection molding, which further improves production efficiency and reduces the time cost of manual part removal.

[0022] To facilitate the rotation of the dual-cavity tilting structure, for example, such as Figure 4 , Figure 5 As shown, the present invention further includes a drive structure comprising a rotating shaft 5 symmetrically arranged on both sides of the double-cavity flipping structure. The end of the rotating shaft 5 away from the double-cavity flipping structure passes through the lower mold 4 and is rotatably connected to the lower mold 4. The lower mold 4 has an installation groove 6 corresponding to one end of the rotating shaft 5. One end of the rotating shaft 5 is located in the installation groove 6 and is connected to a first gear 8 through a one-way bearing 7. A vertically arranged drive rack 9 is meshed on one side of the first gear 8. The lower end of the drive rack 9 is fixedly connected to the bottom of the installation groove 6 through a damping spring rod 10. The lower surface of the upper mold 2 is provided with a pressing positioning structure. When the upper mold 2 moves down, the pressing positioning structure presses the drive rack 9 down.

[0023] In use, when the upper mold 2 moves down, the extrusion positioning structure extrudes and drives the rack 9 to move down. When the upper mold 2 moves closer to the lower mold 4, the extrusion positioning structure positions the upper mold 2 and the lower mold 4 to ensure their stability. As the extrusion positioning structure moves down, it makes extrusion contact with the upper end face of the rack 9, driving the rack 9 to move down. During the downward movement of the rack 9, the extrusion damping spring rod 10 stores force, and at the same time, the rack 9 meshes with the first gear 8 for transmission. However, due to the action of the one-way bearing 7, the first gear 8 cannot drive the rotating shaft 5 to rotate when it rotates. When the upper mold 2 and the lower mold 4 close and the injection molding is completed, and the product is cured, the upper mold 2 and the lower mold 4 are separated to complete the production of a set of products. After the upper mold 2 separates from the lower mold 4, the damping spring rod 10 resets, driving the drive rack 9 to move upward. The drive rack 9 meshes with the first gear 8, driving the rotating shaft 5 to rotate, which in turn drives the double-cavity flipping structure to rotate. At this time, a set of products that have completed injection molding rotates to the lower surface of the lower mold 4 with the double-cavity flipping structure, and the solidified products are ejected by the ejection structure. At the same time, the other side of the double-cavity flipping structure rotates to the upper surface of the lower mold 4, corresponding to the lower mold 4, so that another set of products can be injection molded. This effectively improves production efficiency and eliminates the need to wait for one injection and demolding to be completed before the next injection molding.

[0024] To ensure the overall stability between the upper mold 2 and the lower mold 4, for example, as shown below. Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, the present invention also includes, the extrusion positioning structure including a plurality of positioning holes 11 disposed on the lower mold 4, the upper end of the mounting groove 6 communicating with the positioning holes 11, and a plurality of positioning rods 12 corresponding to the positioning holes 11 being fixedly connected to the lower surface of the upper mold 2.

[0025] When in use, when the upper mold 2 moves close to the lower mold 4, the positioning rod 12 presses against the upper end of the drive rack 9 through the positioning hole 11, causing the drive rack 9 to move down. The downward movement of the drive rack 9 causes the damping spring rod 10 to move down and store force. At the same time, the positioning rod 12 is inserted into the positioning hole 11, ensuring the overall stability between the upper mold 2 and the lower mold 4. After the upper mold 2 separates from the lower mold 4, the positioning rod 12 no longer presses the drive rack 9, the damping spring rod 10 resets, and drives the drive rack 9 to move upward, meshing with the first gear 8 to drive the rotating shaft 5 and the double mold cavity flipping structure to rotate.

[0026] For example, such as Figure 1 , Figure 2 , Figure 4 As shown, the present invention also includes a dual-cavity flipping structure comprising a rotating template 13, wherein the upper and lower surfaces of the rotating template 13 are provided with cavities 14 corresponding to the core 1, and the end of the rotating shaft 5 away from the first gear 8 is fixedly connected to one side of the rotating template 13.

[0027] In use, when the upper mold 2 moves down and closes with the lower mold 4, the core 1 corresponds to a set of cavities 14, allowing for the injection molding of a set of products. After the product has solidified, the upper mold 2 is driven to separate from the lower mold 4, and the rotating template 13 is driven to rotate by the rotating shaft 5. After the rotating template 13 rotates to a certain position, the injection-molded product rotates to the lower surface of the rotating template 13, and the ejector structure ejects the molded product. At the same time, another set of cavities 14 rotates to the upper surface of the rotating template 13, which can drive the upper mold 2 to move down and close with the lower mold 4 again, allowing for the injection molding of the next set of products. This achieves alternating operations of demolding on one side and injection molding on the other side, improving production efficiency.

[0028] To facilitate the ejection of the cured product, for example, such as Figure 1 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the present invention further includes an ejection structure within the rotating template 13. The ejection structure includes a sliding hole 15 horizontally disposed within the rotating template 13. The two ends of the sliding hole 15 pass through a rotating shaft 5 and a first gear 8, respectively. A fixed shaft 16 is rotatably connected within the sliding hole 15. The two ends of the fixed shaft 16 are fixedly connected to an mounting groove 6. The rotating template 13 is provided with several sets of drive grooves 17 communicating with the sliding hole 15. Several sets of downward-facing half-teeth 18 are fixedly connected to the fixed shaft 16. Each mounting groove 6 is provided with two sets of vertically arranged ejector rods 19. The bottom of each cavity 14 is provided with a sliding groove 20 corresponding to the ejector rod 19. The ejector rod 19 is slidably connected to the sliding groove 20. Both sides of the ejector rod 19 are provided with tooth structures 21. The tooth structures 21 mesh with half teeth 18 for transmission. In the initial state, the upper end of the ejector rod 19 is flush with the bottom of the upper cavity 14 and the lower end is inserted into the lower cavity 14. The mounting groove 6 is provided with a reset component that drives the ejector rod 19 to reset when the ejector rod 19 and the half teeth 18 are disengaged.

[0029] In use, after a set of products is injection molded, the rotating shaft 5 drives the rotating template 13 to rotate counterclockwise. When the ejector rod 19 located on the left side of the fixed shaft 16 flips to the right side of the fixed shaft 16, the tooth structure 21 and the half tooth 18 mesh to drive the ejector rod 19 to move. At the same time, the reset component on one side of the ejector rod 19 stores power. When the ejector rod 19 rotates with the rotating template 13 to the right side of the fixed shaft 16, it ensures that the upper end of the ejector rod 19 is flush with the bottom of the upper cavity 14 and the lower end is inserted into the lower cavity 14. The solidified product is ejected by the movement of the ejector rod 19. When the ejector rod 19 located on the right side of the fixed shaft 16 flips to the left side of the fixed shaft 16, its tooth structure 21 no longer meshes with the half tooth 18 for transmission. Relying on the action of the reset component, the ejector rod 19 is reset and moved down to the initial state. As the rotating template 13 rotates, the ejector rod 19 moves to the left side of the fixed shaft 16. Relying on the reset and downward movement of the ejector rod 19, the solidified product is ejected by extrusion, realizing automatic ejection of the workpiece after injection molding, improving production efficiency and reducing the time cost of manual part removal. This ensures that after the rotating template 13 rotates counterclockwise, the ejector rod 19 can automatically insert into the lower cavity 14, and ensures that the upper end of the ejector rod 19 is flush with the bottom of the upper cavity 14, thereby improving the convenience of demolding and injection molding.

[0030] For example, such as Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the present invention also includes a resetting assembly comprising a connecting groove 22 disposed on both sides of the drive groove 17, a drive shaft 23 rotatably connected in the connecting groove 22, a second gear 24 fixedly connected on the drive shaft 23, the drive shaft 23 being connected to the connecting groove 22 via a torsion spring 25, and the second gear 24 meshing with a tooth structure 21 on the side of the top rod 19 away from the half tooth 18.

[0031] In use, after a set of products is injection molded, the rotating shaft 5 drives the rotating template 13 to rotate counterclockwise. When the ejector rod 19 located on the left side of the fixed shaft 16 flips to the right side of the fixed shaft 16, the tooth structure 21 and the half tooth 18 mesh to drive the ejector rod 19 to move. The tooth structure 21 on the other side meshes with the second gear 24 to drive the second gear 24 and the transmission shaft 23 to rotate. The rotation of the transmission shaft 23 drives the torsion spring 25 to store force. When the ejector rod 19 rotates with the rotating template 13 to the right side of the fixed shaft 16, the upper end of the ejector rod 19 is flush with the bottom of the upper cavity 14 and the lower end is inserted into the lower cavity 14. The solidified product is ejected by the movement of the ejector rod 19. When the ejector rod 19 located on the right side of the fixed shaft 16 flips to the left side of the fixed shaft 16, its tooth structure 21 no longer meshes with the half tooth 18 for transmission. It relies on the torsion spring 25 to reset and drive the transmission shaft 23 and the second gear 24 to rotate. The second gear 24 rotates and meshes with the tooth structure 21 on one side of the ejector rod 19 for transmission, driving the ejector rod 19 to reset and move to eject the solidified product. At the same time, this set of ejector rods 19 rotates with the rotating template 13 to the left side of the fixed shaft 16.

[0032] For example, such as Figure 3 , Figure 6 , Figure 8 , Figure 9As shown, the present invention also includes an inlet structure for communicating with cooling liquid on the outer side of the lower mold 4, and a circulation structure communicating with the inlet structure inside the double mold cavity flipping structure. The inlet structure includes a first connector 26 disposed on one side of the upper part of the lower mold 4 and a second connector 27 disposed on one side of the lower part of the lower mold 4. The lower mold 4 is provided with a communication structure corresponding to the first connector 26 and the second connector 27 inside the mold. The connecting structure includes a first conical groove 28 disposed inside the lower mold 4. A horizontally arranged flexible connecting pipe 29 is disposed inside the first conical groove 28. The connecting pipe 29 is connected to a corresponding first connector 26 and a second connector 27 through a passage. A conical connector 30 is connected to one end of the connecting pipe 29 away from the passage. A return spring 31 is fixedly connected between the conical connector 30 and the inner wall of the first conical groove 28.

[0033] In use, after a set of products is injection molded, the cooling liquid is connected through the first connector 26. The cooling liquid enters the connecting structure of the lower mold 4 through the first connector 26, passage, connecting pipe 29, and conical connector 30 to cool the lower mold 4, promote the rapid solidification of the injection-molded plastic, and improve production efficiency. When the cooling liquid cools the upper part of the lower mold 4, the temperature of the cooling liquid will rise. The cooling liquid is discharged through the connecting structure through another set of conical connectors 30, connecting pipe 29, passage and second connector 27, and discharged from the lower side of the lower mold 4. The flow of cooling liquid can not only solidify and cool the plastic that has been injection molded on the upper surface of the lower mold 4, but also preheat the cavity 14 on the lower surface of the lower mold 4, which is convenient for the subsequent injection molding production of the next set of molds, improving the overall production efficiency and convenience. After the injection-molded plastic has cured, the upper mold 2 is driven to separate from the lower mold 4. The rotating shaft 5 drives the rotating template 13 to rotate. When the rotating template 13 rotates, it squeezes the conical connector 30, causing the conical connector 30 to move into the first conical groove 28, which drives the return spring 31 to store force. At this time, the conical connector 30 is no longer connected to the connecting structure. When the rotating template 13 rotates to a certain position, the tapered connector 30 is aligned with a corresponding set of connecting structures again. Relying on the reset effect of the reset spring 31, the tapered connector 30 is connected with the corresponding connecting structure, which facilitates the subsequent cooling of the injection-molded plastic, thereby improving the curing speed and production efficiency.

[0034] For example, such as Figure 3 , Figure 6 , Figure 8 , Figure 9 , Figure 10 , Figure 11As shown, the present invention further includes a circulation structure comprising a circulation channel 32 disposed inside the rotating template 13. Both ends of the circulation channel 32 are provided with a second conical groove 33 corresponding to the conical connector 30. The second conical groove 33 communicates with the circulation channel 32. A magnet 34 is disposed in the second conical groove 33. A sealing ring 35 is fixedly connected to one side of the magnet 34. When the conical connector 30 is located in the second conical groove 33, it is connected to the circulation channel 32.

[0035] When in use, when the conical connector 30 corresponds to the second conical groove 33, the return spring 31 drives the conical connector 30 to move into the second conical groove 33, the conical connector 30 squeezes the sealing ring 35, and at the same time the magnet 34 attracts one end of the conical connector 30, ensuring the sealing effect between the conical connector 30 and the second conical groove 33. At this time, the conical connector 30 is connected to the circulation channel 32. After the product injection molding is completed, the rotating shaft 5 drives the rotating template 13 to rotate. When the rotating template 13 rotates, it relies on the second conical groove 33 to squeeze the conical connector 30 to move into the first conical groove 28, which drives the return spring 31 to store force. When the rotating template 13 rotates to a certain position, the conical connector 30 is aligned with a corresponding set of second conical grooves 33 again. Relying on the reset effect of the return spring 31, the conical connector 30 is driven to move into the corresponding second conical groove 33, which facilitates the subsequent cooling of the injection-molded plastic, improves the curing speed and production efficiency.

[0036] For example, such as Figure 1 As shown, the present invention also includes two sets of connecting joints 36 on the outer side of the upper mold 2, and a circulation passage inside the upper mold 2, wherein the two sets of connecting joints 36 are connected to both ends of the circulation passage.

[0037] During use, the cooling liquid is connected through the connecting connector 36, which, in conjunction with the circulation path, can cool the upper mold 2 and improve the curing efficiency of the plastic after injection molding; the heat source is connected through the connecting connector 36, which, in conjunction with the circulation path, can preheat the upper mold 2 and improve the production efficiency of the product.

[0038] For example, such as Figure 6 As shown, the present invention also includes arc-shaped grooves 37 on both sides of the inner wall of the slot 3 away from the rotating shaft 5, which are matched with the rotation range of the rotating template 13.

[0039] When in use, the arc-shaped grooves 37 set on both sides of the inner wall of the slot 3 are adapted to the rotation range of the rotating template 13. During the rotation of the rotating template 13, it provides stable support and guidance, ensuring its smooth rotation and making the whole production process smoother.

[0040] When in use, the upper mold 2 is driven to move downward, and the positioning rod 12 on the lower surface of the upper mold 2 is inserted into the positioning hole 11 of the lower mold 4. At the same time, the driving rack 9 is pressed to move downward, and the driving rack 9 presses the damping spring rod 10 to store force. At this time, the core 1 of the upper mold 2 is embedded in the cavity 14 on one side of the rotating template 13. The upper mold 2 and the lower mold 4 are closed. After the mold is closed, the injection molding operation is performed, and the plastic is injected into the space formed by the core 1 and the cavity 14. After injection molding is completed, cooling liquid is introduced into the mold through the first connector 26. The cooling liquid enters the communication structure of the lower mold 4 through the connecting pipe 29 and the conical connector 30, cooling the lower mold 4 and promoting the rapid solidification of the injected plastic. After the cooling liquid cools the upper part of the lower mold 4, the temperature rises and it is discharged through another set of conical connectors 30, connecting pipe 29, passage and second connector 27. During the discharge process, the cavity 14 on the lower surface of the lower mold 4 is preheated. At the same time, cooling liquid can also be introduced through the connecting connector 36 of the upper mold 2 to cool the upper mold 2 and improve the solidification efficiency of the injected plastic. After the plastic has cured, the upper mold 2 and the lower mold 4 are separated, the positioning rod 12 is disengaged from the drive rack 9, the damping spring rod 10 is reset, and the drive rack 9 is moved upward. The drive rack 9 meshes with the first gear 8, driving the rotating shaft 5 to rotate, which in turn drives the rotating template 13 to rotate counterclockwise. When the rotating template 13 rotates, it squeezes the conical connector 30, causing the conical connector 30 to move into the first conical groove 28, which drives the reset spring 31 to store force. At this time, the conical connector 30 is no longer connected to the connecting structure. When the rotating template 13 rotates to a certain position, the side with the injection completed is located at the bottom, and the ejection structure inside the rotating template 13 starts to work. For example, when the rotating shaft 5 drives the rotating template 13 to rotate counterclockwise, the ejector rod 19 located on the left side of the fixed shaft 16 flips to the right side of the fixed shaft 16. The tooth structure 21 and the half tooth 18 mesh to drive the set of ejector rods 19 to move. At the same time, the tooth structure 21 on the other side of the set of ejector rods 19 meshes with the second gear 24 to drive the second gear 24 and the transmission shaft 23 to rotate. The rotation of the transmission shaft 23 drives the torsion spring 25 to store force, and the ejector rod 19 moves to eject the solidified product. When the ejector rod 19 located on the right side of the fixed shaft 16 flips to the left side of the fixed shaft 16, its tooth structure 21 no longer meshes with the half tooth 18. It relies on the torsion spring 25 to reset and drive the transmission shaft 23 and the second gear 24 to rotate. The rotation of the second gear 24 meshes with the tooth structure 21 on one side of the ejector rod 19, driving the ejector rod 19 to reset and move down to the initial state. The product that has been solidified is ejected by the ejector rod 19 resetting and moving down. At the same time, it ensures that the upper end of the ejector rod 19 is flush with the bottom of the upper cavity 14 and the lower end is inserted into the lower cavity 14, so as to realize the automatic ejection of the workpiece after injection molding, improve production efficiency, and reduce the time cost of manual part removal. The rotating template 13 continues to rotate. When it reaches a certain position, the tapered connector 30 is aligned with a corresponding connecting structure again. Relying on the reset effect of the return spring 31, the tapered connector 30 is connected to the corresponding connecting structure, preparing for subsequent cooling. At the same time, the cavity 14 on the other side of the rotating template 13 rotates to the top of the lower mold 4, corresponding to the upper mold 2. At this time, the upper mold 2 can be driven to move down again, repeating the above injection, cooling, demolding and other operations to achieve continuous production. During the rotation of the rotating template 13, the arc-shaped grooves 37 on both sides of the inner wall of the slot 3 provide stable support and guidance for the rotating template 13, ensuring its smooth rotation.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold for an automotive lamp cover, characterized in that, The upper mold (2) includes a core (1), characterized in that it also includes a lower mold (4) with a slot (3) that runs through the upper and lower parts. A double-cavity flipping structure is rotatably connected in the slot (3). A driving structure for driving the double-cavity flipping structure to rotate is provided in the lower mold (4). An ejector structure is provided in the double-cavity flipping structure. When the double-cavity flipping structure rotates, it drives the ejector structure to move down and eject the injection-molded car lamp cover.

2. The injection mold for an automotive lamp cover according to claim 1, characterized in that, The driving structure includes a rotating shaft (5) symmetrically arranged on both sides of the double-cavity flipping structure. The end of the rotating shaft (5) away from the double-cavity flipping structure passes through the lower mold (4) and is rotatably connected to the lower mold (4). The lower mold (4) has an installation groove (6) corresponding to one end of the rotating shaft (5). One end of the rotating shaft (5) is located in the installation groove (6) and is connected to a first gear (8) through a one-way bearing (7). The first gear (8) is meshed with a vertically arranged driving rack (9) on one side. The lower end of the driving rack (9) is fixedly connected to the bottom of the installation groove (6) through a damping spring rod (10). The lower surface of the upper mold (2) is provided with a pressing positioning structure. When the upper mold (2) moves down, the pressing positioning structure presses the driving rack (9) down.

3. The injection mold for an automotive lamp cover according to claim 2, characterized in that, The extrusion positioning structure includes several sets of positioning holes (11) set on the lower mold (4), the upper end of the mounting groove (6) is connected to the positioning holes (11), and several sets of positioning rods (12) corresponding to the positioning holes (11) are fixedly connected to the lower surface of the upper mold (2).

4. The injection mold for an automotive lamp cover according to claim 3, characterized in that, The dual-cavity flipping structure includes a rotating template (13), and the upper and lower surfaces of the rotating template (13) are provided with cavities (14) corresponding to the core (1). The end of the rotating shaft (5) away from the first gear (8) is fixedly connected to one side of the rotating template (13).

5. The injection mold for an automotive lamp cover according to claim 4, characterized in that, The rotating template (13) is provided with an ejection structure, which includes a sliding hole (15) horizontally disposed in the rotating template (13). The two ends of the sliding hole (15) pass through the rotating shaft (5) and the first gear (8) respectively. A fixed shaft (16) is rotatably connected in the sliding hole (15). The two ends of the fixed shaft (16) are fixedly connected to the mounting groove (6) respectively. The rotating template (13) is provided with several sets of drive grooves (17) communicating with the sliding hole (15). Several sets of half teeth (18) with downward tooth surfaces are fixedly connected on the fixed shaft (16). The mounting groove (6) is provided with There are two sets of vertically arranged top rods (19). The bottom of the cavity (14) is provided with a sliding groove (20) corresponding to the top rod (19). The top rod (19) is slidably connected to the sliding groove (20). Both sides of the top rod (19) are provided with tooth structure (21). The tooth structure (21) meshes with the half tooth (18) for transmission. In the initial state, the upper end of the top rod (19) is flush with the bottom of the upper cavity (14) and the lower end is inserted into the lower cavity (14). The mounting groove (6) is provided with a reset component that drives the top rod (19) to reset when the top rod (19) and the half tooth (18) are disengaged.

6. The injection mold for an automotive lamp cover according to claim 5, characterized in that, The reset assembly includes connecting grooves (22) on both sides of the drive groove (17). A drive shaft (23) is rotatably connected in the connecting groove (22). A second gear (24) is fixedly connected on the drive shaft (23). The drive shaft (23) is connected to the connecting groove (22) through a torsion spring (25). The second gear (24) meshes with the tooth structure (21) on the side of the top rod (19) away from the half tooth (18).

7. The injection mold for an automotive lamp cover according to claim 6, characterized in that, The lower mold (4) is provided with a liquid inlet structure for communicating with cooling liquid on the outside. The double mold cavity flipping structure is provided with a circulation structure communicating with the liquid inlet structure. The liquid inlet structure includes a first connector (26) respectively provided on the upper side of the lower mold (4) and a second connector (27) respectively provided on the lower side of the lower mold (4). The lower mold (4) is provided with a communication structure corresponding to the first connector (26) and the second connector (27) respectively. The connecting structure includes a first conical groove (28) disposed inside the lower mold (4). A horizontally arranged flexible connecting pipe (29) is provided in the first conical groove (28). The connecting pipe (29) is connected to the corresponding first connector (26) and second connector (27) through a passage. A conical connector (30) is connected to one end of the connecting pipe (29) away from the passage. A return spring (31) is fixedly connected between the conical connector (30) and the inner wall of the first conical groove (28).

8. The injection mold for an automotive lamp cover according to claim 7, characterized in that, The circulation structure includes a circulation channel (32) disposed inside the rotating template (13). Both ends of the circulation channel (32) are provided with a second conical groove (33) corresponding to the conical connector (30). The second conical groove (33) is connected to the circulation channel (32). A magnet (34) is disposed in the second conical groove (33). A sealing ring (35) is fixedly connected to one side of the magnet (34). When the conical connector (30) is located in the second conical groove (33), it is connected to the circulation channel (32).

9. The injection mold for an automotive lamp cover according to claim 8, characterized in that, The upper mold (2) has two sets of connecting joints (36) on its outer side, and the upper mold (2) has a circulation passage inside, with the two sets of connecting joints (36) connected to both ends of the circulation passage.

10. The injection mold for an automotive lamp cover according to claim 9, characterized in that, The slot (3) has arc-shaped grooves (37) on both sides of its inner wall away from the rotating shaft (5) that match the rotation range of the rotating template (13).

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