Multi-cavity injection mold for outer cover of automobile headlamp

Abstract

The utility model relates to the technical field of injection molds, and discloses an automobile headlamp outer cover multi-cavity injection mold, which comprises an upper mold and a lower mold, the inner wall of the bottom end of the lower mold is fixedly connected with a motor, the driving end of the motor is fixedly connected with a rotating rod, the far side of the rotating rod is fixedly connected with a positioning block, and the positioning block is fixedly connected with the lower mold. A pushing rod is fixedly connected to the exterior of the rotating rod, a hinge frame is rotatably connected to the rear side of the pushing rod, a plurality of pulleys are fixedly connected to the upper end and the lower end of the hinge frame, an upper sliding rail is slidably connected to the upper end of the pulley at the top, and connecting blocks are fixedly connected to the two ends of the upper sliding rail; the lower ends of the pulleys at the bottom are slidably connected with lower sliding rails. According to the utility model, cooling is accelerated and the forming period is shortened through a quicker and more efficient method, finished products are conveniently taken out through the hinge frame type lifter after forming, the manual processing cost is reduced, the safety is ensured, and the efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a multi-cavity injection mold for automotive headlight covers. Background Technology

[0002] Injection molds are tools used to produce plastic products, mainly consisting of a gating system, a cooling and regulating system, molding parts, and structural parts. They are commonly used in the manufacturing of consumer electronics, automotive components, medical equipment, and packaging.

[0003] In the manufacturing of automotive front headlight covers, the injection mold uses a process where molten plastic is fed into the mold cavity through a feed port. A water pump drives a water tank to accelerate cooling and solidification through water pipes into the mold cavity. The resulting mold is then ejected by a hinged lift, yielding the molded product. This faster and more efficient cooling method shortens the molding cycle, and the finished product can be easily removed via the hinged lift, reducing manual processing costs while ensuring safety and improving efficiency.

[0004] However, in the existing technology, some automotive front headlight injection molding machines are relatively complex in structure and are prone to wear, aging and failure after long-term use, resulting in long product molding cycle time and high labor and maintenance costs. Therefore, a multi-cavity injection mold for automotive front headlight covers is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a multi-cavity injection mold for automotive headlight covers, aiming to improve the problems of long product molding cycle time and high labor and maintenance costs in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-cavity injection mold for an automotive headlight cover, comprising an upper mold and a lower mold. A motor is fixedly connected to the inner wall of the bottom end of the lower mold. A rotating rod is fixedly connected to the drive end of the motor. A positioning block is fixedly connected to the opposite side of the rotating rod. A push rod is fixedly connected to the outside of the rotating rod. A hinge is rotatably connected to the rear side of the push rod. Multiple pulleys are fixedly connected to both the upper and lower ends of the hinge. An upper slide rail is slidably connected to the upper end of the top pulley. Connecting blocks are fixedly connected to both ends of the upper slide rail. A lower slide rail is slidably connected to the lower end of the bottom pulley. Fixed blocks are fixedly connected to both ends of the lower slide rail. A mold groove is fixedly connected to the top of the connecting block. A mold block is fixedly connected inside the mold groove. A cooling component for heat dissipation of the mold is fixedly connected inside the mold groove.

[0007] As a further description of the above technical solution: the cooling component includes a water pipe, the outside of which is fixedly connected to the inside of the mold groove, one end of which is fixedly connected to a water pump, the other end of which is fixedly connected to a water tank, the top of which is fixedly connected to a heat dissipation plate, and the top of which is fixedly connected to two blade fans.

[0008] As a further description of the above technical solution: multiple discharge ports are fixedly connected to one side of the mold groove, and a conveying pipe is fixedly connected to the outside of each discharge port. A pump is fixedly connected between the two ends of the conveying pipe, and a storage box is fixedly connected to the opposite end of the conveying pipe. Positioning pins are fixedly connected to the four corners of the lower end of the mold.

[0009] As a further description of the above technical solution: the right side of the water pump is fixedly connected to the left side of the water tank, and the rear side of the water tank is fixedly connected to the bottom front side of the upper mold;

[0010] As a further description of the above technical solution: the water pipe is externally fixedly connected to the inside of the lower mold, and the water pipe is externally fixedly connected to the inside of the mold block;

[0011] As a further description of the above technical solution: the fixing block is fixedly connected to both sides of the pulley, and the fixing block is fixedly connected to the inner side of the lower mold;

[0012] As a further description of the above technical solution: the left side of the water tank is fixedly connected to the right side of the water pump, and the rear side of the water tank is fixedly connected to the bottom front side of the upper mold;

[0013] As a further description of the above technical solution: the front end of the discharge port is fixedly connected to the left side of the lower mold, and the rear side of the discharge port is fixedly connected to the front side of the pump.

[0014] This utility model has the following beneficial effects:

[0015] 1. In this utility model, a motor-driven rotating rod controls a push rod to drive a hinge mechanism that moves along a slide rail via pulleys. This mechanism enables the hinge mechanism to push the mold block out and lift it, preventing damage to the product during demolding. Multi-cavity injection molds are typically equipped with high-precision demolding mechanisms to ensure uniform force distribution during demolding, preventing defects such as deformation and scratches.

[0016] 2. In this invention, with the water pump discharging cooling water from the water tank into the mold groove through water pipes, the mold is circulated and cooled by the cooling water after casting. This solves problems such as long mold forming cycle time and poor quality due to uneven heating and cooling time. An effective cooling system can cool all parts of the lampshade evenly, reduce thermal stress, and ensure the shape accuracy of the lampshade. For example, by rationally designing the cooling channels of the mold, the thick-walled and thin-walled parts of the lampshade can be cooled at similar rates, maintaining the shape of the lampshade as required by the design. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the multi-cavity injection mold for the automotive headlight cover proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the material extraction pump for the multi-cavity injection mold of the automotive headlight cover proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the mold block structure of the multi-cavity injection mold for the automotive headlight cover proposed in this utility model.

[0020] Figure 4 This is a schematic diagram of the hinge structure of the multi-cavity injection mold for the automotive headlight cover proposed in this utility model.

[0021] Legend:

[0022] 1. Upper mold; 2. Lower mold; 3. Motor; 4. Rotating rod; 5. Push rod; 6. Hinge; 7. Upper slide rail; 8. Fixing block; 9. Pulley; 10. Mold groove; 11. Lower slide rail; 12. Connecting block; 13. Mold block; 14. Discharge port; 15. Positioning block; 16. Pump; 17. Conveying pipe; 18. Storage box; 19. Water tank; 20. Heat sink; 21. Blade fan; 22. Water pump; 23. Water pipe; 24. Positioning column. Detailed Implementation

[0023] 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.

[0024] Reference Figures 1 to 3This utility model provides an embodiment of a multi-cavity injection mold for an automotive headlight cover, comprising an upper mold 1 and a lower mold 2. A motor 3 is fixedly connected to the inner wall of the bottom end of the lower mold 2. A rotating rod 4 is fixedly connected to the drive end of the motor 3. A positioning block 15 is fixedly connected to the opposite side of the rotating rod 4. A push rod 5 is fixedly connected to the outside of the rotating rod 4. The motor 3 drives the rotating rod 4 to rotate, and the rotating rod 4 drives the push rod 5 to move. The push rod 5 is rotatably connected to a hinge 6. This linkage mechanism design allows the hinge 6 to produce linear movement under the action of the push rod 5. A hinge 6 is rotatably connected to the rear side of the push rod 5. Multiple pulleys 9 are fixedly connected to both the upper and lower ends of the hinge 6. An upper slide rail 7 is slidably connected to the upper end of the top pulley 9, and connecting blocks 12 are fixedly connected to both ends of the upper slide rail 7. A lower slide rail 11 is slidably connected to the lower end of the bottom pulley 9, and lower fixing blocks 8 are fixedly connected to both ends of the lower slide rail 11. A mold groove 10 is fixedly connected to the top of the connecting block 12, and a mold block 13 is fixedly connected inside the mold groove 10. The pulleys 9 at the upper and lower ends of the hinge 6 are slidably connected to the upper slide rail 7 and the lower slide rail 11, respectively. The upper slide rail 7 and the lower slide rail 11 are fixed by the connecting block 12 and the lower fixing block 8, enabling the mold groove 10 to achieve stable opening and closing actions under the drive of the motor 3. Compared to traditional mold opening and closing methods, this structure can more precisely control the speed and position of mold opening and closing, improving production efficiency. A mold block 13 is fixedly connected inside the mold groove 10. Since the movement of the mold groove 10 is controlled by the aforementioned precise mechanical structure, the mold block 13 can be accurately positioned during the mold closing process. When injection molding products such as automotive headlight covers, which require high shape accuracy, accurate positioning can ensure the dimensional accuracy and appearance quality of the product, and reduce scrap caused by inaccurate mold positioning. At the same time, a cooling component for heat dissipation of the mold is fixedly connected inside the mold groove 10.

[0025] Reference Figures 1 to 3The cooling assembly includes a water pipe 23, which is externally and fixedly connected to the inside of the mold groove 10. One end of the water pipe 23 is fixedly connected to a water pump 22. When the water pump 22 operates, it circulates coolant, typically water, within the water pipe 23. During injection molding, the molten plastic of the car headlight housing releases a large amount of heat after being injected into the mold. The coolant in the water pipe 23 can directly absorb this heat, accelerating the cooling process. For example, for some thermoplastics, such as polycarbonate, which have high melt temperatures, rapid cooling allows them to transition from a molten state to a solid state more quickly, thus shortening the molding cycle. Generally, this cooling method can shorten the molding cycle. The other end of the water pipe 23 is fixedly connected to a water tank 19. A heat sink 20 is fixedly connected to the top of the water tank 19. Two bladed fans 21 are fixedly connected to the top of the heat sink 20. These fans, mounted on top of the heat sink 20, accelerate airflow through forced convection, carrying away heat from the heat sink 20. This active cooling method can significantly reduce the temperature of the heat sink 20, thereby improving the efficiency of the entire cooling system. The fan speed and airflow can be adjusted according to actual cooling needs to ensure that the cooling system can work effectively under different injection molding production conditions.

[0026] Reference Figures 1 to 3 Multiple discharge ports 14 are fixedly connected to one side of the mold cavity 10. Each discharge port 14 is fixedly connected to a conveying pipe 17. A pump 16 is fixedly connected between the two ends of the conveying pipe 17. A storage tank 18 is fixedly connected to the opposite end of the conveying pipe 17. The multiple discharge ports 14 are located on one side of the mold cavity 10 and connected to the storage tank 18 via the conveying pipe 17 and the pump 16. The pump 16 can precisely control the delivery volume and speed of the molten plastic, ensuring that each discharge port 14 can discharge material uniformly. In multi-cavity molds such as injection molding of automotive headlight covers, uniform material supply is crucial. For example, for headlight covers with complex shapes, the wall thickness of different parts may vary. Uniform material supply ensures that each part receives sufficient molten plastic filling, avoiding defects such as localized material shortages and shrinkage cavities, thereby improving the stability of product quality. Positioning posts 24 are fixedly connected to the four corners of the lower end of the upper mold 1. The positioning posts 24 play a role in precise positioning during mold installation. When the mold is assembled with the injection molding machine or other related equipment, the positioning posts 24 can ensure that the mold is accurately positioned in both the horizontal and vertical directions.

[0027] Working principle: After the injection molding machine starts, the upper mold 1 and lower mold 2 close. The positioning pin 24 of the upper mold 1 is positioned and merged into the positioning groove of the lower mold 2. After computer detection, the storage tank heats the internal plastic. The raw material is discharged from the conveying pipe 17 to the suction pump 16. The suction pump 16 draws the raw material from the storage tank 18 and discharges it into the mold groove 10 through the discharge port 14. After the upper mold 1 and lower mold 2 are successfully pressed, the water pump 22 draws the cooled water from the water tank 19 and discharges it into the mold groove 10 through the water conveying pipe 23 to quickly cool the mold. Hot water is drawn again through water pipe 23 and pumped back into water tank 19 by water pump 22. The heat dissipation plate 20 and fan on water tank 19 move to quickly cool the water. The water is then fed back into mold slot 10 to cool the mold. After the mold is cooled and formed, the motor 3 drives the drive rod to push the push rod 5. The ejected hinge 6 moves back and forth in the slide rail controlled by pulley 9. The hinge 6 is raised, lifting the mold slot 10. The mold formed in the mold slot 10 rises, and the upper mold 1 opens at the same time. After the mold is raised, it is manually collected and stacked.

[0028] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A multi-cavity injection mold for an automotive headlight cover, comprising an upper mold (1) and a lower mold (2), characterized in that: A motor (3) is fixedly connected to the inner wall of the bottom end of the lower mold (2). A rotating rod (4) is fixedly connected to the drive end of the motor (3). A positioning block (15) is fixedly connected to the opposite side of the rotating rod (4). A push rod (5) is fixedly connected to the outside of the rotating rod (4). A hinge (6) is rotatably connected to the rear side of the push rod (5). Multiple pulleys (9) are fixedly connected to both the upper and lower ends of the hinge (6). The upper end of the top pulley (9) is slidably connected to an upper... The upper slide rail (7) has connecting blocks (12) fixedly connected to both ends. The lower end of the bottom pulley (9) is slidably connected to the lower slide rail (11). The lower end of the lower slide rail (11) has fixing blocks (8) fixedly connected to both ends. The top of the connecting block (12) is fixedly connected to the mold groove (10). The mold groove (10) is fixedly connected to the inside of the mold block (13). The mold groove (10) is fixedly connected to the inside of the mold for cooling the mold.

2. The multi-cavity injection mold for automotive headlight covers according to claim 1, characterized in that: The cooling component includes a water pipe (23), the outside of which is fixedly connected to the inside of the mold groove (10). One end of the water pipe (23) is fixedly connected to a water pump (22), and the other end of the water pipe (23) is fixedly connected to a water tank (19). A heat dissipation plate (20) is fixedly connected to the top of the water tank (19), and two blade fans (21) are fixedly connected to the top of the heat dissipation plate (20).

3. The multi-cavity injection mold for automotive headlight covers according to claim 2, characterized in that: Multiple discharge ports (14) are fixedly connected to one side of the mold groove (10). A conveying pipe (17) is fixedly connected to the outside of each discharge port (14). A pump (16) is fixedly connected between the two ends of the conveying pipe (17). A storage box (18) is fixedly connected to the opposite end of the conveying pipe (17). Positioning pins (24) are fixedly connected to the four corners of the lower end of the upper mold (1).

4. The multi-cavity injection mold for automotive headlight covers according to claim 2, characterized in that: The right side of the water pump (22) is fixedly connected to the left side of the water tank (19), and the rear side of the water tank (19) is fixedly connected to the bottom front side of the upper mold (1).

5. The multi-cavity injection mold for automotive headlight covers according to claim 2, characterized in that: The water pipe (23) is externally fixedly connected to the inside of the lower mold (2), and the water pipe (23) is externally fixedly connected to the inside of the mold block (13).

6. The multi-cavity injection mold for automotive headlight covers according to claim 1, characterized in that: The fixing block (8) is fixedly connected to both sides of the pulley (9) and the fixing block (8) is fixedly connected to the inner side of the lower mold (2).

7. The multi-cavity injection mold for automotive headlight covers according to claim 2, characterized in that: The left side of the water tank (19) is fixedly connected to the right side of the water pump (22), and the rear side of the water tank (19) is fixedly connected to the bottom front side of the upper mold (1).

8. The multi-cavity injection mold for automotive headlight covers according to claim 3, characterized in that: The front end of the discharge port (14) is fixedly connected to the left side of the lower mold (2), and the rear side of the discharge port (14) is fixedly connected to the front side of the pump (16).

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