Airbag cover injection mold

Abstract

The utility model relates to the technical field of mould injection technology, concretely is a kind of air bag cover injection mould, its solution existing air bag cover injection mould stripping, cover plate is directly dropped and is easy to cause friction collision and lead to surface wear and tear, damage, affect product quality's technical problem, including mutually butting mould, the mould inside is equipped with the plastic shaping groove for the forming of cover plate body, further include mounting bracket, guiding shaft is slidably installed on the mounting bracket, one end of the guiding shaft is equipped with receiving station, spring is installed between receiving station and mounting bracket, the side of receiving station is equipped with the inclined stress surface;When two the mould merges, the acting force of the mould movement acts on stress surface, drives receiving station towards the direction of moving away from mould;When two the mould unfolds, the spring drives receiving station movement, makes the bottom of cover plate body of receiving station movement, to receive the cover plate body after forming.

Description

Technical Field

[0001] This utility model relates to the field of mold injection technology, specifically to an airbag cover plate injection mold. Background Technology

[0002] In automotive safety, airbags are crucial protective components. After installation, they typically require a cover plate to enclose the airbag installation area to ensure stability and maintain the overall aesthetics of the structure. The cover plate used to enclose the airbag is usually characterized by its large size and thin outer wall.

[0003] Currently, most mantles are manufactured using injection molding, with mass production achieved through specialized injection molds. During injection molding, after the mantle is shaped and cooled in the mold's molding groove, it needs to be ejected from the groove by an ejector pin to complete the demolding process. However, most existing injection molds lack a support structure after the ejector pin pushes the mantle out of the mold, causing it to fall directly downwards. Because the mantle is relatively thin, it is highly susceptible to friction and collision with the support structure at the bottom during this direct fall, resulting in scratches, dents, and other abrasions on the surface. In severe cases, this can even cause cracking, deformation, and other damage, significantly impacting product quality, increasing the defect rate during production, and causing additional losses for the company. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an airbag cover injection mold, which solves the technical problem that after demolding, the cover plate is prone to surface wear and damage due to friction and collision caused by direct drop, thus affecting product quality.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an airbag cover injection mold, comprising interlocking molds, the interior of which is provided with a molding groove for forming the cover body, and a mounting frame, on which a guide shaft is slidably mounted, a receiving platform is mounted at one end of the guide shaft, a spring is installed between the receiving platform and the mounting frame, and one side of the receiving platform is provided with an inclined force-bearing surface; when the two molds are joined together, the force of the mold movement acts on the force-bearing surface, driving the receiving platform to move away from the mold; when the two molds are unfolded, the spring drives the receiving platform to move, causing the receiving platform to move to the bottom of the cover body to receive the formed cover body.

[0006] Furthermore, a roller is rotatably installed on the outer wall of the mold where it contacts the inclined force-bearing surface of the receiving platform, and the roller makes rolling contact with the inclined force-bearing surface.

[0007] Furthermore, a pushing device is installed on one side of the receiving platform, which is used to push the cover plate body on the receiving platform out from the other side of the receiving platform.

[0008] Furthermore, the pushing device includes a telescopic rod and a push plate disposed at the telescopic end of the telescopic rod. The push plate has a protective pad on the side facing the cover plate body, and the telescopic rod is mounted on a support frame.

[0009] Furthermore, the other side of the receiving platform is provided with an outwardly extending receiving plate, which is used to receive the cover plate body pushed out by the pushing device. Furthermore, a retaining edge is provided at the edge of the receiving plate.

[0010] Furthermore, the mounting bracket has a through hole for the guide shaft to pass through, the diameter of the guide shaft matches the diameter of the through hole, and the guide shaft slides in fit with the through hole.

[0011] Furthermore, a limiting block is installed at the other end of the guide shaft away from the receiving platform, and the size of the limiting block is larger than the size of the through hole.

[0012] Furthermore, the mold has an injection port and a conveying groove inside the mold. The injection port and the molding groove are connected through the conveying groove, and the molten molding material can be injected into the molding groove through the injection port and the conveying groove.

[0013] Furthermore, an ejector is slidably and sealed on the mold, and when the ejector moves toward the formed cover plate body, it can eject the formed cover plate body from the molding groove.

[0014] Compared with the prior art, the present invention provides an injection mold for an airbag cover plate, which has the following beneficial effects: This airbag cover injection mold, through the arrangement of a mounting bracket, guide shaft, receiving platform, and spring, allows the receiving platform to move away from the mold during mold assembly. This is achieved by leveraging the inclined force surface of the receiving platform due to the mold's movement, preventing interference with normal mold assembly and production. During mold unfolding and demolding, the spring drives the receiving platform to automatically move to the bottom of the cover body. The ejected cover body then steadily moves to the top of the receiving platform, providing stable support and effectively preventing damage from direct drop and friction. This significantly improves product quality, reduces defect rates, and lowers production costs for enterprises. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention, in which the supporting plate is not installed; Figure 2 This is a front view structural diagram of the present invention, in which the mold is in an unfolded state; Figure 3 This is a front view structural diagram of the present invention, in which the mold is in a merged state; Figure 4 This is a top view of the structure of this utility model, in which the mold is in the unfolded state; Figure 5 This is a three-dimensional structural diagram of the present invention, in which the mounting support plate is installed; Figure 6 This is a three-dimensional structural diagram of the present invention, wherein the mold is mounted on the frame; Figure 7 This is a front view structural diagram of the present invention, in which the mold is mounted on the frame.

[0016] In the diagram: 1. Mold; 2. Shaping groove; 3. Mounting frame; 4. Receiving platform; 5. Force-bearing surface; 6. Spring; 7. Guide shaft; 8. Cover plate body; 9. Ejector; 10. Limiting block; 11. Roller; 12. Receiving plate; 13. Telescopic rod; 14. Push plate; 15. Protective pad; 16. Support frame; 17. Edge retaining wall; 18. Frame; 19. Mounting shaft; 20. Telescopic device; 21. Drive device; 22. Mounting plate. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 6-7 This utility model discloses an injection mold for an airbag cover, comprising a mold 1 that is connected to each other. The mold 1 has a molding groove 2 inside for injection molding the cover body 8. The structure of the molding groove 2 restricts the external dimensions of the cover body 8, ensuring that the molded cover body 8 meets the required shape. Simultaneously, an injection port is provided on the mold 1, and a corresponding conveying groove is provided inside the mold 1. One end of the conveying groove is connected to the injection port, and the other end extends to and connects with the molding groove 2, forming a complete injection channel. In actual injection molding, molten plastic material is injected from the injection port and then conveyed to the molding groove 2 via the conveying groove. After the plastic material cools and solidifies in the molding groove 2, the required cover body 8 is formed.

[0019] In addition, to facilitate demolding of the cover plate body 8 after molding, an ejector 9 is slidably installed on the mold 1. The installation position of the ejector 9 and the mold 1 is sealed to effectively prevent molten plastic material from leaking through the installation gap during injection molding. After the cover plate body 8 is molded in the molding groove 2, the ejector 9 is controlled to slide towards the molded cover plate body 8. The end of the ejector 9 will contact the cover plate body 8 and apply a pushing force. With the continuous movement of the ejector 9, the molded cover plate body 8 can be smoothly ejected from the molding groove 2.

[0020] The airbag cover injection mold also includes a frame 18, on which the molds 1 that are connected to each other are mounted. The docking and unfolding actions of the molds 1 are driven by the telescopic device 20, which can be a common driving component such as a hydraulic cylinder or a pneumatic cylinder.

[0021] The mold 1 and the frame 18 are connected by a mounting shaft 19, and the connection method can be installed according to the actual situation. In one method, both molds 1 on both sides are movable, and the mounting shafts 19 on the corresponding molds 1 are slidably connected to the frame 18. During operation, the telescopic devices 20 on both sides push the corresponding molds 1 respectively, so that the two molds 1 slide on the frame 18 along the axial direction of the mounting shafts 19, thereby completing the joining or unfolding action.

[0022] In another method, one mold 1 is set as fixed and the other mold 1 is set as movable. The mounting shaft 19 on the movable mold 1 is slidably connected to the frame 18, while the mounting shaft 19 on the fixed mold 1 is fixedly connected to the frame 18. During operation, the movable mold 1 is pushed by the telescopic device 20 so that it moves toward or away from the fixed mold 1 along the axis of the mounting shaft 19, thereby realizing the docking and unfolding of the mold 1.

[0023] To drive the ejector components 9 to eject the cover plate body 8, a drive device 21 is also installed on the frame 18. This drive device 21 can be a common drive component such as a cylinder or an electric telescopic rod. A mounting plate 22 is fixedly installed on the telescopic end of the drive device 21, and multiple ejector components 9 are mounted on this mounting plate 22. When demolding is required, the drive device 21 is activated and drives the telescopic end to extend and retract. Then, through the mounting plate 22, all ejector components 9 move synchronously toward the cover plate body 8 in the molding groove 2, so that multiple ejector components 9 act evenly on the cover plate body 8 and smoothly eject it from the molding groove 2.

[0024] like Figure 1-5As shown, the airbag cover injection mold is also equipped with a mounting bracket 3. The mounting bracket 3 can be installed on the frame 18. A guide shaft 7 is slidably mounted on the mounting bracket 3. A receiving platform 4 for supporting the cover body 8 is fixedly mounted on the end of the guide shaft 7 facing the mold 1. At the same time, a spring 6 is also installed between the receiving platform 4 and the mounting bracket 3. The spring 6 is sleeved on the outside of the guide shaft 7, and the receiving platform 4 has an inclined force-bearing surface 5 on the side facing the mold 1.

[0025] When the two molds 1 are docked (merged), the mold 1 will contact the inclined force-bearing surface 5 of the receiving platform 4 during its movement. The force of its movement will be transmitted along the inclined force-bearing surface 5, thereby driving the receiving platform 4 to overcome the elastic force of the spring 6 and drive the guide shaft 7 to slide away from the mold 1 along the mounting bracket 3, ensuring that the receiving platform 4 will not interfere with the normal docking of the molds 1 and subsequent injection molding production. When the two molds 1 are unfolded and demolded after injection molding, the position of the force exerted by the mold 1 on the force-bearing surface 5 changes (towards...). Figure 2 (Move in the direction of the middle arrow). At this time, the spring 6 will release elastic potential energy, pushing the receiving platform 4 to drive the guide shaft 7 to slide until the receiving platform 4 moves to the bottom position of the cover plate body 8. After the ejector 9 pushes the cover plate body 8 out of the molding groove 2, the ejected cover plate body 8 will move steadily to the top of the receiving platform 4. The receiving platform 4 can then stably support the cover plate body 8, effectively preventing the cover plate body 8 from falling directly.

[0026] The mounting bracket 3 and the guide shaft 7 are installed in a specific manner. The mounting bracket 3 has a through hole for the guide shaft 7 to pass through at the installation position corresponding to the guide shaft 7. The outer diameter of the guide shaft 7 matches the inner diameter of the through hole, and the outer wall of the guide shaft 7 contacts the inner wall of the through hole. Alternatively, the diameter of the through hole is slightly larger than the diameter of the guide shaft 7 to ensure that the guide shaft 7 can slide smoothly in the through hole, while avoiding the guide shaft 7 from shaking due to excessive clearance, thus ensuring the stability of the receiving platform 4 during movement.

[0027] In addition, a limiting block 10 is fixedly installed or detachably installed at the other end of the guide shaft 7 away from the receiving platform 4. The overall size (such as diameter or side length) of the limiting block 10 is larger than the size of the through hole, so that the limiting block 10 cannot pass through the through hole. The sliding stroke of the guide shaft 7 can be limited by the limiting block 10 to prevent the guide shaft 7 from coming out of the through hole under the force of the spring 6.

[0028] like Figure 2-3As shown, a roller 11 is rotatably mounted on the outer wall of the mold 1 at the position where it contacts the inclined force-bearing surface 5 of the receiving platform 4. This roller 11 is assembled onto the mold 1 via a connecting shaft or bearing and can rotate around its own axis. When the mold 1 contacts the inclined force-bearing surface 5 of the receiving platform 4 during the merging process, the roller 11 forms rolling contact with the inclined force-bearing surface 5, converting the original sliding friction into rolling friction. This effectively reduces the friction and wear between the mold 1 and the receiving platform 4, making the movement of the receiving platform 4 smoother and more stable.

[0029] On another mold 1 that is connected to the mold 1 with the roller 11 installed, a groove is provided at the position corresponding to the roller 11. When the two molds 1 are joined together, the roller 11 will enter the groove of the other mold 1, thereby avoiding collision or obstruction between the roller 11 and the other mold 1, and effectively preventing physical interference between the roller 11 and the mold 1 during normal connection.

[0030] like Figure 4 As shown, in order to transport the cover plate body 8 out of the position between the two molds 1, a pushing device is installed on one side of the receiving platform 4. This pushing device is used to smoothly push the cover plate body 8, which is supported on the receiving platform 4, out from the other side of the receiving platform 4. Specifically, the pushing device includes a telescopic rod 13 and a push plate 14 fixedly installed at the telescopic end of the telescopic rod 13. The telescopic rod 13 can be a common telescopic device such as a cylinder or an electric telescopic rod. A protective pad 15 is pasted or fixed on the side of the push plate 14 facing the cover plate body 8, which serves to protect the cover plate body 8 and prevent the push plate 14 from scratching the cover plate body 8. The telescopic rod 13 is installed around the mold 1 or on the frame 18 or on the receiving platform 4 through the support frame 16.

[0031] like Figure 5 As shown, a receiving plate 12 extending horizontally outward is provided on the other side of the receiving platform 4. The position of the receiving plate 12 corresponds to the pushing direction of the pushing device and is used to receive the cover plate body 8 pushed out by the pushing device. In order to limit the sliding direction of the cover plate body 8 on the receiving plate 12 or to prevent the cover plate body 8 from falling off the receiving plate 12, an upwardly protruding retaining edge 17 is integrally formed, welded or bolted to the edge of the receiving plate 12. The retaining edge 17 limits the cover plate body 8.

[0032] After the cover plate body 8 is pushed onto the receiving plate 12 by the pushing device, the retaining edge 17 of the receiving plate 12 will effectively limit the cover plate body 8, making it stably stay on the receiving plate 12. At this time, the operator can directly remove the cover plate body 8 from the receiving plate 12 to complete the material removal operation of the cover plate body 8.

[0033] In summary, when using this airbag cover injection mold, firstly, the telescopic device 20 drives the two molds 1 to engage. During this engagement process, the force of the mold 1's movement contacts and applies force to the inclined force-bearing surface 5 of the receiving platform 4, driving the receiving platform 4 to overcome the elastic force of the spring 6 and drive the guide shaft 7 to slide away from the mold 1 along the through hole on the mounting bracket 3, thus avoiding interference of the receiving platform 4 with the mold 1's closing and subsequent production.

[0034] After the mold 1 is connected, the molten injection material is injected from the injection port of the mold 1 using the injection equipment. The material flows smoothly into the molding groove 2 through the conveying groove in the mold 1. After the injection material cools and solidifies in the molding groove 2 to form the cover plate body 8, the telescopic device 20 is activated again to drive the two molds 1 to separate and unfold.

[0035] As the mold 1 unfolds, its position on the inclined force-bearing surface 5 of the receiving platform 4 changes. The spring 6 releases its elastic potential energy, pushing the receiving platform 4 to drive the guide shaft 7 to slide in the opposite direction along the through hole until the top of the receiving platform 4 moves to the bottom of the cover plate body 8 and is in a ready-to-receive state. Subsequently, the drive device 21 on the frame 18 is activated, and its telescopic end drives the mounting plate 22 and multiple ejector parts 9 on the mounting plate 22 to move synchronously. The ejector parts 9 slide toward the cover plate body 8 in the molding groove 2, smoothly ejecting the molded cover plate body 8 out of the molding groove 2. After being ejected, the cover plate body 8 moves steadily onto the receiving platform 4.

[0036] Finally, the pushing device on one side of the receiving platform 4 starts to work. The telescopic rod 13 extends and drives the push plate 14 to move towards the cover plate body 8. The push plate 14 contacts the cover plate body 8 through the protective pad 15 and pushes the cover plate body 8 from the receiving platform 4 to the receiving plate 12 on the other side. At this time, the worker can remove the cover plate body 8 from the receiving plate 12 and complete one injection molding production operation of the cover plate body 8.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold for an airbag cover, comprising interlocking molds (1), wherein the mold (1) has a forming groove (2) inside for forming the cover body (8), characterized in that: It also includes a mounting frame (3), on which a guide shaft (7) is slidably mounted. A receiving platform (4) is mounted at one end of the guide shaft (7). A spring (6) is installed between the receiving platform (4) and the mounting frame (3). An inclined force-bearing surface (5) is provided on one side of the receiving platform (4). When the two molds (1) are combined, the force of the movement of the molds (1) acts on the force-bearing surface (5), driving the receiving platform (4) to move away from the molds (1). When the two molds (1) are unfolded, the spring (6) drives the receiving platform (4) to move, so that the receiving platform (4) moves to the bottom of the cover plate body (8) to receive the molded cover plate body (8).

2. The airbag cover injection mold according to claim 1, characterized in that: A roller (11) is rotatably installed on the outer wall of the mold (1) at the position of contacting the inclined force-bearing surface (5) of the receiving platform (4), and the roller (11) makes rolling contact with the inclined force-bearing surface (5).

3. The airbag cover injection mold according to claim 1 or 2, characterized in that: A pushing device is installed on one side of the receiving platform (4), which is used to push the cover plate body (8) on the receiving platform (4) out from the other side of the receiving platform (4).

4. The airbag cover injection mold according to claim 3, characterized in that: The pushing device includes a telescopic rod (13) and a push plate (14) provided at the telescopic end of the telescopic rod (13). The push plate (14) has a protective pad (15) on the side facing the cover body (8). The telescopic rod (13) is mounted on the support frame (16).

5. The airbag cover injection mold according to claim 3, characterized in that: The receiving platform (4) is provided with an outwardly extending receiving plate (12) on the other side, which is used to receive the cover plate body (8) pushed out by the pushing device.

6. The airbag cover injection mold according to claim 5, characterized in that: A retaining edge (17) is provided at the edge of the receiving plate (12).

7. The airbag cover injection mold according to claim 1, characterized in that: The mounting bracket (3) has a through hole through which the guide shaft (7) passes. The diameter of the guide shaft (7) matches the diameter of the through hole, and the guide shaft (7) slides in conjunction with the through hole.

8. The airbag cover injection mold according to claim 7, characterized in that: A limiting block (10) is installed at the other end of the guide shaft (7) away from the receiving platform (4), and the size of the limiting block (10) is larger than the size of the through hole.

9. The airbag cover injection mold according to claim 1, characterized in that: The mold (1) has an injection port and a conveying groove. The injection port and the molding groove (2) are connected through the conveying groove. Molten molding material can be injected into the molding groove (2) through the injection port and the conveying groove.

10. The airbag cover injection mold according to claim 9, characterized in that: The mold (1) is slidably and sealed with an ejector (9). When the ejector (9) moves toward the formed cover plate body (8), it can eject the formed cover plate body (8) from the molding groove (2).

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