Injection mold for lampshade of automobile steering lamp

Abstract

The utility model belongs to the technical field of vehicle accessory processing devices, and discloses an injection mold for a lampshade of an automobile steering lamp, which comprises a bottom plate arranged at the bottom, a lower mold base sleeved on the bottom plate, a top plate arranged at the top and an upper mold base arranged below the top plate and used for being matched with the lower mold base to complete shaping, an ejection hole used for demolding is formed in the lower mold base, an ejection plate connected to the bottom plate in a sliding mode is arranged at the bottom of the lower mold base, a movable plate is arranged on the ejection plate in a sliding mode, two movable blocks with the distance adjustable are arranged on the movable plate, and ejection rods with the length adjustable are fixedly connected to the two movable blocks. According to the injection mold for the lampshade of the automobile steering lamp, through the design of the movable block with the adjustable distance and the ejector rod with the adjustable length, the ejector mechanism can rapidly meet the demolding requirements of lampshades of different models, and the problems that due to the fact that the position of the ejector rod of a traditional mold is fixed, replacement is frequent, and the machining efficiency is affected are effectively solved.

Description

Technical Field

[0001] This utility model relates to the technical field of vehicle parts processing equipment, and more specifically, to an injection mold for automotive turn signal lamp covers. Background Technology

[0002] Injection molds are core equipment for the mass production of plastic products and have important applications in the automotive parts manufacturing industry. As a precision component that combines functionality and appearance requirements, the injection molds for automotive turn signal covers must meet special technical requirements such as high light transmittance, complex curved surface molding, and zero surface defects. Traditional lamp cover injection molds usually adopt a fixed ejection system, which uses a rigid ejector rod in conjunction with an ejector plate to achieve the demolding action. Its structural design directly affects the product demolding quality and production efficiency.

[0003] However, in actual production, it has been found that due to the size differences of turn signal covers for different car models and the changes in the structure of the lower mold base, the position and height of the ejector rod in the traditional ejection system are fixed. When switching product models, the entire ejection mechanism needs to be disassembled and reinstalled to adapt to the new mold cavity, resulting in mold changeover time of up to several hours, which seriously affects the processing efficiency of the production line. In particular, the strict requirements of the undercut structure at the bottom of the lamp cover on the accuracy of the ejection point make it difficult for the existing rigid ejection system to quickly match the processing needs of lamp covers of different models and sizes, which can easily cause product scratches or ejection defects caused by ejector rod misalignment. This technical bottleneck has become a key obstacle restricting the rapid changeover of automotive lighting molds and the co-production of multiple varieties.

[0004] In view of this, we propose an injection mold for automotive turn signal lamp covers. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] The purpose of this utility model is to provide an injection mold for automotive turn signal covers, so as to solve the problem that the fixed ejector rod of the existing automotive turn signal cover injection mold has low efficiency in changing molds for multiple models of lamp covers due to the inability to adjust the position and height, and is prone to product scratches or puncture defects caused by ejector rod misalignment.

[0007] 2. Technical Solution

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an injection mold for automotive turn signal covers, comprising a base plate at the bottom, a lower mold base sleeved on the base plate, a top plate at the top, and an upper mold base below the top plate for cooperating with the lower mold base to complete the shaping. The lower mold base has an ejection hole for demolding. The bottom of the lower mold base is provided with an ejection plate slidably connected to the base plate. A movable plate is slidably provided on the ejection plate. The movable plate is provided with two movable blocks with adjustable spacing. Each of the two movable blocks is fixedly connected with an ejection rod of adjustable length. The ejection rod includes a main rod fixedly connected to the movable block and a secondary rod sleeved on the main rod. The secondary rod is used to eject the molded mold from the ejection hole when it moves with the ejection plate.

[0009] Preferably, both ends of the movable plate are fixedly connected to sliders, the ejector plate is provided with a groove adapted to the size of the sliders, and an electric push rod is fixedly connected to the ejector plate, with the extended end of the electric push rod fixedly connected to the movable plate.

[0010] Preferably, a first screw and a second screw are rotatably connected to the movable plate. The first screw and the second screw are fixedly connected by a connecting rod. The threads of the first screw and the second screw are arranged in opposite directions. A first screw sleeve is connected to both the first screw and the second screw by a ball screw pair thread. The two first screw sleeves are respectively fixedly connected to the two movable blocks.

[0011] Preferably, a first motor is fixedly connected to the movable plate, a first bevel gear is fixedly connected to the output end of the first motor, and a second bevel gear is fixedly connected to the connecting rod, with the first bevel gear meshing with the second bevel gear.

[0012] Preferably, a limiting block is fixedly connected to the main rod, and a limiting groove adapted to the size of the limiting block is provided on the secondary rod.

[0013] Preferably, a second motor is fixedly connected inside the main rod, a third screw is fixedly connected to the output end of the second motor, a second screw sleeve is connected to the third screw via a ball screw thread, a fixing ring is fixedly connected inside the secondary rod, and the second screw sleeve is rotatably connected to the fixing ring.

[0014] Preferably, a swivel ring with a T-shaped cross-section is fixedly connected to the second threaded sleeve, and the swivel ring is rotatably connected to the fixed ring.

[0015] 3. Beneficial effects

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This utility model, through the design of adjustable spacing movable blocks and adjustable length ejector rods, enables the ejector mechanism to quickly adapt to the demolding requirements of different lampshade models, effectively solving the problem of frequent replacement and reduced processing efficiency caused by the fixed position of ejector rods in traditional molds.

[0018] 2. The linkage adjustment mechanism of the ejector rod length and position of this utility model can accurately match the complex curved surface features of the bottom of the lampshade, avoid product surface scratches or structural damage caused by ejector rod misalignment, and ensure the surface integrity of the finished lampshade.

[0019] 3. This utility model adopts an adjustment method that combines motor drive and ball screw transmission, which improves the convenience and accuracy of adjusting the position and height of the ejector rod. At the same time, the modular design facilitates maintenance and component replacement. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model.

[0021] Figure 2 This is an exploded view of an embodiment of the present invention.

[0022] Figure 3 This is a diagram showing the connection relationship of the movable plate according to an embodiment of the present invention.

[0023] Figure 4 This is a diagram showing the positional relationship between the first screw and the second screw according to an embodiment of the present invention.

[0024] Figure 5 This is a cross-sectional schematic diagram of the ejector rod according to an embodiment of the present invention.

[0025] Figure 6 This is a cross-sectional schematic diagram of a fixing ring according to an embodiment of the present invention.

[0026] Explanation of the labels in the diagram:

[0027] 1. Base plate; 2. Top plate; 3. Upper mold base; 4. Lower mold base; 41. Ejector hole; 5. Ejector plate; 6. Ejector rod; 61. Main rod; 62. Secondary rod; 7. Movable plate; 8. Electric push rod; 9. Slider; 10. Slide groove; 11. Movable block; 12. First screw; 13. Second screw; 14. First threaded sleeve; 15. Connecting rod; 16. First motor; 17. First bevel gear; 18. Second bevel gear; 19. Second motor; 20. Third screw; 21. Second threaded sleeve; 22. Fixing ring; 23. Rotary ring; 24. Limiting block; 25. Limiting groove. Detailed Implementation

[0028] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0029] In the description of this utility model, "multiple" means two or more, unless otherwise explicitly specified.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Please see Figure 1-6 This utility model provides a technical solution:

[0032] An injection mold for an automotive turn signal lens cover includes a base plate 1 at the bottom, a lower mold base 4 sleeved on the base plate 1, a top plate 2 at the top, and an upper mold base 3 located below the top plate 2 for cooperating with the lower mold base 4 to complete the shaping. The lower mold base 4 has an ejection hole 41 for demolding. An ejector plate 5 slidably connected to the base plate 1 is provided at the bottom of the lower mold base 4. A movable plate 7 is slidably disposed on the ejector plate 5. The movable plate 7 is provided with two movable blocks 11 with adjustable spacing. Each movable block 11 is fixedly connected to an adjustable length... The ejector rod 6 includes a main rod 61 fixedly connected to the movable block 11 and a secondary rod 62 sleeved on the main rod 61. The secondary rod 62 is used to eject the molded mold from the ejection hole 41 when it moves with the ejector plate 5. This arrangement makes the sliding fit between the base plate 1, the lower mold base 4 and the ejector plate 5 form a stable support system. Combined with the composite motion mechanism of the movable plate 7 and the ejector rod 6, it not only ensures the overall structural rigidity of the mold, but also provides multi-dimensional adjustment space for the ejection system, so as to realize the structural adaptability when changing different types of lampshade molds.

[0033] The movable plate 7 has sliders 9 fixedly connected to both ends. The ejector plate 5 has a groove 10 that matches the size of the sliders 9. An electric push rod 8 is fixedly connected to the ejector plate 5. The extended end of the electric push rod 8 is fixedly connected to the movable plate 7. This arrangement allows the sliders 9 and the groove 10 to constrain the movement trajectory of the movable plate 7. Combined with the drive of the electric push rod 8, the horizontal position of the two ejector rods 6 can be quickly adjusted. It should be noted that the bottom plate 1 should have channels on both sides for the electric push rod 8 to move up and down with the ejector plate 5.

[0034] Furthermore, a first screw 12 and a second screw 13 are rotatably connected to the movable plate 7. The first screw 12 and the second screw 13 are fixedly connected by a connecting rod 15. The threads of the first screw 12 and the second screw 13 are reversed. Both the first screw 12 and the second screw 13 are connected to a first screw sleeve 14 by a ball screw pair thread. The two first screw sleeves 14 are fixedly connected to the two movable blocks 11 respectively. This arrangement ensures the synchronous accuracy of the ejector rod spacing adjustment and maintains the positional stability after adjustment through the mechanical self-locking characteristic, which can avoid displacement deviation during ejection and improve the demolding accuracy.

[0035] Secondly, a first motor 16 is fixedly connected to the movable plate 7, and a first bevel gear 17 is fixedly connected to the output end of the first motor 16. A second bevel gear 18 is fixedly connected to the connecting rod 15. The first bevel gear 17 and the second bevel gear 18 are meshed together. This arrangement not only saves space for horizontal installation and achieves a compact structure, but also enhances the adjustment driving force through the torque amplification effect of the gear meshing pair, ensuring the reliability of the action when adjusting large-size molds.

[0036] Furthermore, a limiting block 24 is fixedly connected to the main rod 61, and a limiting groove 25 adapted to the size of the limiting block 24 is provided on the secondary rod 62. This arrangement allows the secondary rod 62 to extend and retract while forming a mechanical hard limit, which prevents the ejector rod 6 from overextending and causing the structure to jam, and also avoids relative rotation between the two, ensuring stability during long-term use.

[0037] Specifically, a second motor 19 is fixedly connected inside the main rod 61, and a third screw 20 is fixedly connected to the output end of the second motor 19. A second screw sleeve 21 is connected to the third screw 20 through a ball screw thread. A fixing ring 22 is fixedly connected inside the auxiliary rod 62. The second screw sleeve 21 is rotatably connected to the fixing ring 22. Through the closed structure, the length of the ejector rod 6 can be precisely adjusted, and the external transmission mechanism can be avoided from occupying the mold space.

[0038] In addition, a swivel ring 23 with a T-shaped cross section is fixedly connected to the second threaded sleeve 21. The swivel ring 23 is rotatably connected to the fixed ring 22. This configuration converts the linear motion of the second threaded sleeve 21 into the axial displacement of the auxiliary rod 62, eliminating the influence of the lateral component force of the traditional threaded pair on the straightness of the ejector rod 6.

[0039] Working principle:

[0040] The injection mold for the automotive turn signal lens cover utilizes a three-stage adjustment system to rapidly preset ejection parameters: During the changeover preparation stage, the electric push rod 8 drives the movable plate 7 to slide laterally along the slide groove 10 to the target station, determining the horizontal reference position of the ejector rod 6. Subsequently, the first motor 16 rotates synchronously through a bevel gear set linked to a double screw with a reverse thread, driving the two movable blocks 11 on both sides to move symmetrically to precisely adjust the spacing of the ejector rod 6. In addition, the second motor 19 drives the auxiliary rod 62 to extend and retract axially through a built-in ball screw, precisely setting the ejection length. After all parameters are adjusted, the electric push rod 8 self-locks when powered off, the ball screw auxiliary rod mechanically locks, and the motor brake device simultaneously activate a triple locking mechanism, fixing the position, spacing, and length parameters of the ejector rod 6 as a rigid whole. During demolding, the ejector plate 5 drives the adjusted ejector rod 6 to rise vertically along the base plate 1, smoothly ejecting the molded lens cover. Throughout the ejection process, the adjustment mechanism remains silent, only performing rigid transmission motion, thus achieving rapid adaptation to multiple models while completely eliminating the risk of parameter drift during dynamic ejection.

[0041] It should be noted that, in another feasible embodiment, the adjustable length of the ejector rod 6 can provide the possibility of demolding. For example, after the horizontal position and spacing are adjusted, when the lampshade is formed in the molding chamber formed by the upper mold base 3 and the lower mold base 4, the auxiliary rod 62 can be ejected upward by activating the second electric motor in the main rod 61, thereby realizing the demolding operation.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An injection mold for an automotive turn signal lamp cover, characterized in that: The mold includes a base plate (1) at the bottom, a lower mold base (4) sleeved on the base plate (1), a top plate (2) at the top, and an upper mold base (3) below the top plate (2) for cooperating with the lower mold base (4) to complete the shaping. The lower mold base (4) has an ejection hole (41) for demolding. The bottom of the lower mold base (4) is provided with an ejection plate (5) slidably connected to the base plate (1). A movable plate (7) is slidably provided on the ejection plate (5). Two movable blocks (11) with adjustable spacing are provided on the movable plate (7). An ejection rod (6) with adjustable length is fixedly connected to each of the two movable blocks (11). The ejection rod (6) includes a main rod (61) fixedly connected to the movable block (11) and a secondary rod (62) sleeved on the main rod (61). The secondary rod (62) is used to eject the molded mold from the ejection hole (41) when it moves with the ejection plate (5).

2. The injection mold for automotive turn signal covers as described in claim 1, characterized in that: Both ends of the movable plate (7) are fixedly connected to sliders (9). The ejector plate (5) is provided with a groove (10) that matches the size of the slider (9). An electric push rod (8) is fixedly connected to the ejector plate (5). The extended end of the electric push rod (8) is fixedly connected to the movable plate (7).

3. The injection mold for automotive turn signal covers as described in claim 2, characterized in that: The movable plate (7) is rotatably connected to a first screw (12) and a second screw (13). The first screw (12) and the second screw (13) are fixedly connected by a connecting rod (15). The threads of the first screw (12) and the second screw (13) are arranged in opposite directions. The first screw (12) and the second screw (13) are each connected to a first screw sleeve (14) by a ball screw pair thread. The two first screw sleeves (14) are fixedly connected to the two movable blocks (11) respectively.

4. The injection mold for automotive turn signal covers as described in claim 3, characterized in that: A first motor (16) is fixedly connected to the movable plate (7), and a first bevel gear (17) is fixedly connected to the output end of the first motor (16). A second bevel gear (18) is fixedly connected to the connecting rod (15), and the first bevel gear (17) and the second bevel gear (18) are meshed together.

5. The injection mold for automotive turn signal covers as described in claim 1, characterized in that: A limiting block (24) is fixedly connected to the main rod (61), and a limiting groove (25) adapted to the size of the limiting block (24) is provided on the secondary rod (62).

6. The injection mold for automotive turn signal covers as described in claim 5, characterized in that: The main rod (61) is fixedly connected to a second motor (19), and the output end of the second motor (19) is fixedly connected to a third screw (20). The third screw (20) is connected to a second screw sleeve (21) through a ball screw thread. The auxiliary rod (62) is fixedly connected to a fixing ring (22), and the second screw sleeve (21) is rotatably connected to the fixing ring (22).

7. The injection mold for automotive turn signal covers as described in claim 6, characterized in that: The second threaded sleeve (21) is fixedly connected to a swivel ring (23) with a T-shaped cross section, and the swivel ring (23) is rotatably connected to the fixed ring (22).

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