Ejection mechanism of automobile lamp shell injection mold

Abstract

The utility model discloses an automobile lamp housing injection mold ejection mechanism, and particularly relates to the technical field of injection molds, the automobile lamp housing injection mold ejection mechanism comprises a mold forming assembly mounted on a base station, the mold forming assembly comprises a lower mold base, the upper surface of the lower mold base is provided with a mold cavity, and the inner wall surface of the mold cavity is fitted with a lower mold housing. According to the utility model, the secondary ejection assembly is arranged, the lower mold shell is pushed by the ejection block to drive the molded lamp shell injection molding part to leave the interior of the mold cavity, and after the lower mold shell leaves the mold cavity, the ejection rod slides upwards in the ejection block, and at the moment, the upper end face of the ejection rod leaves the clamping groove to push the molded lamp shell injection molding part to be separated from the lower mold shell; the mode that the lower mold shell is ejected out firstly and then the product is ejected out through the ejector rod is adopted, so that a large gap is formed between the product and the interior of the mold cavity, an operator can insert a part taking tool or finger more easily, it is ensured that the ejection process is conducted smoothly, and the mold is suitable for ejection of products of complex structures.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an ejection mechanism for an automotive lamp housing injection mold. Background Technology

[0002] The lamp housing, also known as the lamp cover or lamp housing, is an important component of a lamp. Its main function is to protect the electronic components and light source inside the lamp. Automotive lamp housings are usually manufactured using injection molds, through which plastic materials are processed into automotive lamp housings with specific shapes and sizes using the injection molding process.

[0003] A search revealed that utility model patent CN209350777U discloses an injection mold for automotive lamp housings. The mold has strong anti-interference capabilities, high mold closing precision, and improves product quality.

[0004] In existing technical solutions, products are usually ejected directly from the lower mold. For some products with complex structures and high clamping force, direct ejection may be difficult, causing the product to get stuck in the mold and making it impossible to remove smoothly. On the other hand, a large ejection force may cause the product to deform. Utility Model Content

[0005] The purpose of this invention is to provide an ejection mechanism for an automotive lamp housing injection mold to solve the problems mentioned in the background art.

[0006] This utility model can be achieved through the following technical solution: an ejection mechanism for an injection mold of an automotive lamp housing, comprising a mold forming assembly mounted on a base, the mold forming assembly including a lower mold base, a mold cavity provided on the upper surface of the lower mold base, a lower mold shell fitted to the inner wall of the mold cavity, a slot provided on the surface of the lower mold shell, a driving cavity provided at the bottom of the lower mold base, a secondary ejection assembly installed inside the driving cavity, the secondary ejection assembly including a top block that is raised and lowered at the top of the inner cavity of the driving cavity, a top rod that is slidably installed inside the top block, and the upper end face of the top block being fixed to the outer wall of the lower mold shell, the upper end face of the top rod being fitted to the slot, and a movable block being fixed to the bottom surface of the top rod, and a gap provided on the side of the top block for limiting the sliding of the movable block.

[0007] A further technical improvement of this utility model is that: a long screw driven by a forward and reverse motor is installed in the middle of the top surface of the driving cavity, and a transmission plate is threadedly connected to the outer surface of the long screw. Both sides of the transmission plate are slidably attached to the inner wall of the driving cavity. A sliding rod is fixed to the side of the inner cavity of the driving cavity near the transmission plate, and the sliding rod is slidably disposed with the transmission plate.

[0008] A further technical improvement of this utility model is that: the surface of the transmission plate is provided with two through slots, and two mounting blocks are fixed on the lower surface of the transmission plate. A positive and negative screw is rotatably installed between the two mounting blocks. A fitting slide is sleeved on both threads of the positive and negative screw. A connecting rod is hinged on the fitting slide. The connecting rod passes through the corresponding through slot and is hinged to the movable block.

[0009] A further technical improvement of this utility model is that: a worm gear 1 driven by a second motor is installed on the lower surface of the transmission plate, a worm wheel meshing on the worm gear 1, and a second worm gear 2 is arranged parallel to one side of the worm gear 1. The first and second screws pass horizontally through the middle of the worm wheel and are fixed to the worm wheel. Pulleys are fixedly sleeved on the outer surfaces of the shafts of the first and second worm gears, and a belt is installed between the two pulleys. The end of the long screw passes through the transmission plate and enters the interior of the belt.

[0010] A further technical improvement of this utility model is that: two positive and negative screws are provided, the fitting slide plate is threadedly connected to the two positive and negative screws at the same time, and the two end faces of the fitting slide plate are in contact with the inner wall of the drive cavity.

[0011] A further technical improvement of this utility model is that: a frame is installed above the lower mold base, a hydraulic cylinder is installed above the frame, an upper mold base driven by the hydraulic cylinder is installed inside the frame, and a moving mold that cooperates with the mold cavity is provided on the lower surface of the upper mold base.

[0012] A further technical improvement of this utility model is that a guide rod is installed between the upper mold base and the lower mold base, and the other end of the guide rod is movably embedded inside the edge of the lower mold base.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By setting a secondary ejection assembly, when the lamp housing injection molded part is ejected, the ejector block first pushes the lower mold shell to carry the molded lamp housing injection molded part away from the inside of the mold cavity. After the lower mold shell leaves the mold cavity, the ejector rod slides upward in the ejector block. At this time, the upper end face of the ejector rod leaves the slot, pushing the molded lamp housing injection molded part to separate from the lower mold shell, realizing the separation of the lamp housing injection molded part, which facilitates subsequent injection molding. By first ejecting the lower mold shell and then using the ejector rod to eject the product, a larger gap is formed between the product and the inside of the mold cavity, making it easier for operators to insert picking tools or fingers, ensuring the smooth progress of the ejection process, and adapting to the ejection of complex structure products.

[0015] 2. During the ejection process, four ejector rods are installed. When the connecting rod pushes the movable block to move within the empty part, the movable block pushes the ejector rods, which in turn push the product out of the lower mold shell. This results in a more uniform and stable force, thereby reducing product deformation caused by uneven or excessive ejection force and improving product quality. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is an internal sectional view of the present invention;

[0018] Figure 2 For practical purposes Figure 1 A magnified view of a section at point A in the middle;

[0019] Figure 3 For practical purposes Figure 1 A magnified view of a section at point B in the middle;

[0020] Figure 4 This is a schematic diagram of the structural connection between the worm and worm wheel of this utility model.

[0021] In the diagram: 1. Lower mold base; 2. Drive cavity; 3. Mold cavity; 4. Lower mold shell; 5. Guide rod; 6. Upper mold base; 7. Moving mold; 8. Slot; 9. Ejector rod; 10. Ejector block; 11. Movable block; 12. Nozzle; 13. Connecting rod; 14. Transmission plate; 15. Slide rod; 16. Mounting block; 17. Through slot; 18. Long screw; 19. Worm gear one; 20. Positive and negative screws; 21. Fitting slide plate; 22. Pulley; 23. Belt; 24. Worm gear. Detailed Implementation

[0022] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0023] Please see Figures 1-4As shown, this utility model provides an ejection mechanism for an injection mold of an automotive lamp housing, including a mold forming assembly mounted on a base. The mold forming assembly includes a lower mold base 1, a mold cavity 3 on the upper surface of the lower mold base 1, a lower mold shell 4 fitted to the inner wall of the mold cavity 3, a slot 8 on the surface of the lower mold shell 4, a driving cavity 2 at the bottom of the lower mold base 1, and a secondary ejection assembly installed inside the driving cavity 2. The secondary ejection assembly includes four ejector blocks 10 that are raised and lowered at the top of the inner cavity of the driving cavity 2. Each ejector block 10 has a sliding ejector rod 9 installed inside it, and the upper end face of the ejector block 10 is fixed to the outer wall of the lower mold shell 4. The upper end face of the ejector rod 9 is fitted to the slot 8, and a movable block 11 is fixed to the bottom surface of the ejector rod 9. A gap 12 for limiting the sliding of the movable block 11 is provided on the side of the ejector block 10. In use, the injection liquid is inside the lower mold shell 4, and the lower mold shell... 4. After being pressed by the mold forming components, the molded lamp housing injection part is obtained by being installed in the mold cavity 3. During ejection, the ejector block 10 pushes the lower mold shell 4 to carry the molded lamp housing injection part away from the inside of the mold cavity 3. After the lower mold shell 4 leaves the mold cavity 3, the ejector rod 9 slides upward in the ejector block 10. At this time, the upper end face of the ejector rod 9 leaves the slot 8, pushing the molded lamp housing injection part to separate from the lower mold shell 4, realizing the separation of the lamp housing injection part, which is convenient for subsequent injection molding. By first ejecting the lower mold shell 4 and then using the ejector rod 9 to eject the product, a larger gap is formed between the product and the inside of the mold cavity 3, making it easier for operators to insert part-removing tools or fingers, ensuring the smooth progress of the ejection process, adapting to the ejection of complex structure products, and receiving more uniform and stable force during the ejection process, thereby reducing the product deformation problem caused by uneven or excessive ejection force and improving product quality.

[0024] See Figure 2 and Figure 3 As shown, a long screw 18 driven by a reversing motor is installed in the middle of the top surface of the drive cavity 2. A transmission plate 14 is threadedly connected to the outer surface of the long screw 18. Both sides of the transmission plate 14 slide against the inner wall of the drive cavity 2. A slide rod 15 is fixed to the inner cavity of the drive cavity 2 near the side of the transmission plate 14. The slide rod 15 slides against the transmission plate 14. When the long screw 18 is subjected to the positive driving force of the reversing motor, it rotates, causing the transmission plate 14 to rise. The transmission plate 14 slides upward and slides on the slide rod 15. The transmission plate 14 drives the top block 10, thereby causing the lower mold shell 4 to leave the mold cavity 3 and eject the lower mold shell 4 first.

[0025] See figure Figure 3 As shown, the surface of the transmission plate 14 is provided with two through slots 17, and two mounting blocks 16 are fixed on the lower surface of the transmission plate 14. Positive and negative screws 20 are rotatably mounted between the two mounting blocks 16. A contacting slide plate 21 is fitted onto each of the two threads of the positive and negative screws 20. A connecting rod 13 is hinged to the contacting slide plate 21. The connecting rod 13 passes through the corresponding through slot 17 and is hinged to the movable block 11. Initially, as... Figure 2 As shown, when the positive and negative screws 20 rotate, they drive the contact plate 21 to slide. At this time, one end of the connecting rod 13 moves in the slot 17 and rotates with the upper surface of the contact plate 21. The other end of the connecting rod 13 pushes the movable block 11 to rise, and the movable block 11 pushes the push rod 9. The movable block 11 rises to the top of the empty part 12. At this time, the push rod 9 pushes the product out of the lower mold shell 4.

[0026] See Figure 3 and Figure 4 As shown, a worm gear 19 driven by a second motor is installed on the lower surface of the transmission plate 14. A worm wheel 24 meshes with the worm gear 19, and a second worm gear is arranged parallel to one side of the worm gear 19. A forward and reverse screw 20 passes horizontally through the middle of the worm wheel 24 and is fixed to the worm wheel 24. Pulleys 22 are fixedly sleeved on the outer surfaces of the shafts of both the worm gear 19 and the second worm gear. A belt 23 is installed between the two pulleys 22. The end of the long screw 18 passes through the transmission plate 14 and enters the interior of the belt 23.

[0027] Two positive and negative screws 20 are provided. The contact plate 21 is threadedly connected to both positive and negative screws 20. The two end faces of the contact plate 21 are in contact with the inner wall of the drive cavity 2. The positive and negative motors drive the worm gear 19 to rotate. With the connection between the worm gear 19 and the worm wheel 24, the positive and negative screws 20 are driven to rotate synchronously. The positive and negative screws 20 change the relative position of the two contact plates 21, thereby controlling the ejection action of the push rod 9. The belt 23 drives the worm gear 2 to rotate synchronously, so that the contact plate 21 is driven by the two positive and negative screws 20 rotating in the same direction. The contact plate 21 is stable during sliding by sliding with the end of the contact plate 21 in contact with the inner cavity of the drive cavity 2.

[0028] See Figure 1 As shown, a frame is installed above the lower mold base 1, and a hydraulic cylinder is installed above the frame. An upper mold base 6 driven by the hydraulic cylinder is installed inside the frame. A moving mold 7 that works with the mold cavity 3 is provided on the lower surface of the upper mold base 6. During injection molding, the moving mold 7 is driven by the upper mold base 6 to enter the lower mold shell 4. The lamp housing injection molded part is formed by the cooperation between the moving mold 7 and the lower mold shell 4.

[0029] See Figure 1 As shown, a guide rod 5 is installed between the upper mold base 6 and the lower mold base 1. The other end of the guide rod 5 is movably embedded inside the edge of the lower mold base 1. As the upper mold base 6 moves downward, the end of the guide rod 5 moves into the interior of the lower mold base 1, thereby realizing the guiding sliding between the upper mold base 6 and the lower mold base 1.

[0030] When this utility model is in use, during the ejection of the lamp housing injection molded part, the ejector block 10 first pushes the lower mold shell 4 to drive the molded lamp housing injection molded part away from the inside of the mold cavity 3. After the lower mold shell 4 leaves the mold cavity 3, the ejector rod 9 slides upward in the ejector block 10. At this time, the upper end face of the ejector rod 9 leaves the slot 8, pushing the molded lamp housing injection molded part to separate from the lower mold shell 4, realizing the separation of the lamp housing injection molded part, which facilitates subsequent injection molding. By first ejecting the lower mold shell 4 and then using the ejector rod 9 to eject the product, a larger gap is formed between the product and the inside of the mold cavity 3, making it easier for operators to insert picking tools or fingers, ensuring the smooth progress of the ejection process, and adapting to the ejection of complex structure products.

[0031] During the ejection process, four ejector rods 9 are provided. When the connecting rod 13 pushes the movable block 11 to move within the empty part 12, the movable block 11 pushes the ejector rods 9, and the ejector rods 9 push the product out of the lower mold shell 4. The product receives a more uniform and stable force, thereby reducing the product deformation problem caused by uneven or excessive ejection force and improving product quality.

[0032] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An ejection mechanism for an automotive lamp housing injection mold, comprising a mold forming assembly mounted on a base, characterized in that: The mold forming assembly includes a lower mold base (1), the upper surface of which is provided with a mold cavity (3), the inner wall of which is fitted with a lower mold shell (4), the surface of which is provided with a slot (8), the bottom of which is provided with a driving cavity (2), the interior of which is installed with a secondary ejection assembly, the secondary ejection assembly including a top block (10) which is lifted and disposed at the top of the inner cavity of the driving cavity (2), the interior of which is slidably installed with a top rod (9), the upper end face of which is fixed to the outer wall of the lower mold shell (4), the upper end face of which is fitted with the slot (8), and the bottom surface of which is fixed with a movable block (11), and the side of which is provided with a gap (12) for limiting the sliding of the movable block (11).

2. The ejection mechanism of an automotive lamp housing injection mold according to claim 1, characterized in that, A long screw (18) driven by a forward and reverse motor is installed in the middle of the top surface of the drive cavity (2). A transmission plate (14) is threadedly connected to the outer surface of the long screw (18). Both sides of the transmission plate (14) are slidably attached to the inner wall of the drive cavity (2). A slide rod (15) is fixed to the side of the inner cavity of the drive cavity (2) near the transmission plate (14). The slide rod (15) is slidably disposed with the transmission plate (14).

3. The ejection mechanism of an automotive lamp housing injection mold according to claim 2, characterized in that, The transmission plate (14) has two through slots (17) on its surface, and two mounting blocks (16) are fixed on the lower surface of the transmission plate (14). A positive and negative screw (20) is rotatably installed between the two mounting blocks (16). A fitting slide plate (21) is fitted on both threads of the positive and negative screw (20). A connecting rod (13) is hinged on the fitting slide plate (21). The connecting rod (13) passes through the corresponding through slot (17) and is hinged to the movable block (11).

4. The ejection mechanism of an automotive lamp housing injection mold according to claim 3, characterized in that, The lower surface of the transmission plate (14) is equipped with a worm gear (19) driven by a reversing motor. A worm wheel (24) meshes with the worm gear (19), and a worm gear (2) is arranged parallel to one side of the worm gear (19). The reversing screw (20) passes horizontally through the middle of the worm wheel (24), and the reversing screw (20) is fixed to the worm wheel (24). The outer surfaces of the shafts of the worm gear (19) and the worm gear (22) are fixedly fitted with pulleys (22). A belt (23) is installed between the two pulleys (22). The end of the long screw (18) passes through the transmission plate (14) and enters the interior of the belt (23).

5. The ejection mechanism of an automotive lamp housing injection mold according to claim 3, characterized in that, Two positive and negative screws (20) are provided. The fitting slide plate (21) is threadedly connected to both positive and negative screws (20) at the same time, and the two end faces of the fitting slide plate (21) are in contact with the inner wall of the drive cavity (2).

6. The ejection mechanism of an automotive lamp housing injection mold according to claim 1, characterized in that, A frame is installed above the lower mold base (1), a hydraulic cylinder is installed above the frame, and an upper mold base (6) driven by the hydraulic cylinder is installed inside the frame. A moving mold (7) that cooperates with the mold cavity (3) is provided on the lower surface of the upper mold base (6).

7. The ejection mechanism of an automotive lamp housing injection mold according to claim 6, characterized in that, A guide rod (5) is installed between the upper mold base (6) and the lower mold base (1), and the other end of the guide rod (5) is movably embedded inside the edge of the lower mold base (1).

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