Injection mold for a vehicle light component

Abstract

The application provides an injection mold for a car lamp part, and belongs to the technical field of molds. The injection mold for the car lamp part can prevent the product from being damaged. The injection mold for the car lamp part comprises a mold frame, a sliding block, and a driving connecting rod capable of driving the sliding block to move up and down. The sliding block is internally provided with a transversely arranged movable rod. The inner side wall of the mold frame is provided with a positioning hole. One end of the movable rod extends out of the sliding block and is positioned and inserted into the positioning hole. The sliding block is internally provided with a spring. The two ends of the spring act on the sliding block and the movable rod respectively. The other end of the movable rod abuts against the driving connecting rod under the action of the spring. The outer periphery of the upper end of the driving connecting rod is provided with an inclined guide surface. The driving connecting rod can move downward relative to the sliding block, so that the other end of the movable rod slides along the guide surface and the one end of the movable rod is simultaneously separated from the positioning hole. The application is beneficial to ensuring the forming quality of the product.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of molds, and relates to an injection mold for a vehicle lamp part. BACKGROUND

[0002] In an injection mold, for a mold with a complex product shape, a core pulling operation is often completed in a form such as longitudinal, transverse and oblique core pulling demolding or a combination thereof.

[0003] Patent with the application publication number CN102343651A discloses a locking and oblique pulling device of a fixed mold oblique sliding block of an injection mold, which is characterized by comprising an oblique sliding block (1), a guide sliding block (2) and an oil cylinder (3). The oil cylinder and the guide sliding block are arranged in the fixed mold to drive the oblique sliding block to perform linkage of locking and oblique pulling. The guide sliding block is provided with a guide rail groove of a locking section and an oblique pulling section. The oblique sliding block is provided with a sliding shaft. During work, the guide sliding block is driven by the oil cylinder to perform transverse movement. The guide rail groove of the guide sliding block drives the oblique sliding block to perform locking and oblique pulling movement through the sliding shaft of the oblique sliding block. When the sliding shaft is located in the locking section of the guide rail groove, the oblique sliding block is locked.

[0004] The above mold simplifies the mold structure by means of oblique core pulling, but for products such as automobile lamp covers with more complex shapes, it is often necessary to design a spring core pulling structure driven by oil pressure in the large sliding block for forming a reverse clamping position. The above mold cannot be applied. When the large sliding block is located at the ground side, the large sliding block is relatively heavy, and the driving device such as the oil cylinder moves downward under strong pressure. When the internal pressure exceeds the load, the rubber oil cylinder will swell and deform. Thus, when the mold is opened, the spring core pulling structure moves downward before the core pulling block is pulled out, which causes the product to be damaged. Therefore, a person skilled in the art can easily consider the following: 1. lightweight design of the sliding block, design of a weight reduction hole or a material with lower density; 2. strengthening the carrying capacity of the driving device; 3. designing an additional driving device to independently control the demolding program of the spring core pulling structure and the sliding block, and executing them independently. SUMMARY

[0005] The present application provides an injection mold for a vehicle lamp part to solve the above problems in the prior art.

[0006] The object of the present application can be achieved by the following technical solutions:

[0007] The injection mold of the vehicle lamp component comprises a mold frame, a slider and a driving link capable of driving the slider to move up and down, characterized in that the slider is provided with a transversely arranged movable link, the inner wall of the mold frame is provided with a positioning hole, one end of the movable link extends out of the slider and is positioned and inserted into the positioning hole, the slider is provided with a spring, both ends of the spring act on the slider and the movable link respectively, and the other end of the movable link abuts against the driving link under the action of the spring, the outer periphery of the upper end of the driving link is provided with an inclined guide surface, and the driving link can move downward relative to the slider to make the other end of the movable link slide along the guide surface and simultaneously make one end of the movable link disengage from the positioning hole.

[0008] The mold frame is the basic platform of the mold, the core and the movable slider are arranged on the mold frame, the slider is used to cooperate with the core to form an injection molding cavity, and the slider can be independently slid to directionally demold after injection molding is completed, so as to avoid interference when the product with complex shape is demolded, and the driving link is used to drive the slider to reciprocatingly slide up and down; by arranging the transversely arranged movable link in the slider and arranging the positioning hole on the surface of the mold frame to position and cooperate with one end of the movable link, and by abutting the other end of the movable link against the outer periphery of the driving link, the slider is constrained by the movable link and the position of the slider relative to the mold frame is kept stable during injection molding, even if the slider is heavy, the weight of the slider will not act on the driving link, thereby avoiding long-time load of the driving device which keeps the driving link in a locked state, and affecting the product quality due to the downward movement of the slider; meanwhile, the spring is arranged between the slider and the movable link, the spring can be a compression spring or a tension spring, the spring applies a tendency to the movable link to move in the direction of the driving link, the guide surface is arranged on the outer periphery of the upper end of the driving link, and when the driving link moves downward relative to the slider, the other end of the movable link can slide along the guide surface and simultaneously make one end of the movable link disengage from the positioning hole; in this way, one end of the movable link abuts against the mold frame and the other end of the movable link abuts against the guide surface to limit the driving link vertically when the mold is closed, the driving link continues to move upward relative to the slider and pushes the movable link into the positioning hole through the guide surface when the mold is just closed; when the mold is opened, the driving link can move downward and gradually eliminate the transverse limitation of the other end of the movable link through the inclined guide surface, the movable link can gradually disengage from the positioning hole under the action of the tendency and overcome the friction resistance, and the relative position between the other end of the movable link and the guide surface does not change after the movable link completely disengages from the positioning hole, the slider moves downward with the driving link to realize demolding, the independent reverse-docking insert block arranged on the slider has enough time to advance core-pulling before the slider is demolded, the product is prevented from being damaged due to the downward movement of the slider, the speed state of the slider does not fluctuate greatly during demolding, the product or the driving device is prevented from being damaged, and the product quality is further ensured.

[0009] In the injection mold for the vehicle lamp component, the outer periphery of the driving link has a stroke groove, the slider is fixed with a limiting part, the limiting part is located in the stroke groove and abuts against the lower side of the inner wall of the stroke groove in the up-down direction, the driving link can move downward relative to the slider and abut against the movable rod. In this way, the stroke groove and the limiting part can limit the range of relative movement of the driving link and the slider, and when the movable rod is locked, the lower side of the inner wall of the stroke groove abuts against the limiting part, so that even if the locking of the movable rod fails, the driving link can still support the slider, thereby avoiding affecting the product quality.

[0010] In the injection mold for the vehicle lamp component, the other end of the movable rod is in a round head shape. In this way, the frictional resistance of the other end of the movable rod when sliding along the guide surface can be reduced, the service life of the component is improved, and the transverse movement of the movable rod is smoother.

[0011] In the injection mold for the vehicle lamp component, the slider has an axle hole, the movable rod is inserted and matched in the axle hole, the movable rod has an axle shoulder part, the spring is sleeved on the outer periphery of the movable rod, and the spring is arranged between the axle shoulder part and the inner wall of the axle hole in abutment. In this way, the movable rod is supported by the inner wall of the axle hole and the inner wall of the positioning hole to achieve locking of the slider, and the spring continuously and reliably applies a force to the movable rod through the axle shoulder part to maintain the movement tendency of the movable rod, thereby ensuring stable operation of the movable rod.

[0012] In the injection mold for the vehicle lamp component, the inner wall of the axle hole has a containing ring groove, the spring and the axle shoulder part are located in the containing ring groove, and the end of the spring abuts against the inner wall of the containing ring groove. In this way, the inner wall of the containing ring groove can limit the movement of the movable rod, so that the movable rod does not come out of the axle hole during operation and loses the matching relationship with the driving link.

[0013] In the injection mold for the vehicle lamp component, the mold frame is fixed with a driving cylinder, and the lower end of the driving link is connected with the output end of the driving cylinder. The driving cylinder can be an oil cylinder or an air cylinder, which can provide sufficient force to the slider, thereby ensuring that the driving link realizes directional and stable feeding.

[0014] In the injection mold for the vehicle lamp component, one end of the movable rod is connected with a roller that can roll along the inner wall of the positioning hole. In this way, when the one end of the movable rod comes out of the positioning hole, the friction caused by the weight of the slider can be greatly reduced, so that the movable rod can smoothly come out of the lock.

[0015] In the injection mold for the vehicle lamp component, the guide surface is in a tapered shape that is tapered upward. In this way, even if the driving link changes the circumferential angle, the guide surface can always correctly guide the transverse movement position of the movable rod, thereby ensuring stable operation.

[0016] In the injection mold of the vehicle lamp component, the upper end of the driving link is inserted into the slider, vertical sliding rails are fixed on the mold frame, and the slider is slidingly connected to the sliding rails. Thus, the movement track of the slider is ensured to be accurate, and the stable operation of the mechanism is ensured to guarantee the quality of the injection product.

[0017] In the injection mold of the vehicle lamp component, the injection mold further comprises a core, a stop adjusting piece is detachably connected to the top of the slider, and the stop adjusting piece is limited and abuts against the core above. The core can limit the stroke of the slider, that is, the slider moves to the core, and the movable rod is just opposite to the positioning hole. The driving link continues to feed relative to the slider to realize locking. The stop adjusting piece is arranged on the top of the slider, so that the operator can detach and replace the stop adjusting piece to make the movable rod and the positioning hole just align when the stop adjusting piece is just abutted against the core, and the maintenance and adjustment are facilitated.

[0018] Compared with the prior art, the injection mold of the vehicle lamp component has the following advantages:

[0019] In the injection process of the injection mold of the vehicle lamp component, the slider is constrained by the movable rod and is stable relative to the mold frame. Even if the weight of the slider is large, the weight will not act on the driving link, thereby avoiding the long-time load on the driving device below the driving link in the locked state, and the slider is prevented from moving downward to affect the product quality. When the mold is closed, one end of the movable rod is abutted against the mold frame, and the other end is abutted against the guide surface and vertically limited by the driving link. When the mold is just closed, the driving link continues to move upward relative to the slider and pushes the movable rod into the positioning hole through the guide surface. When the mold is opened, the driving link can move downward and gradually eliminate the transverse limitation on the other end of the movable rod through the inclined guide surface. The movable rod can gradually separate from the positioning hole under the trend action and overcome the friction resistance. After the movable rod completely separates from the positioning hole, the relative position of the other end of the movable rod and the guide surface does not change. The slider moves downward with the driving link to realize mold opening, ensures that the independent reverse-docking insert arranged on the slider has enough time to advance core in advance under the action of the same driving source before the slider is opened, and avoids that the slider directly falls to cause the product to be damaged. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a schematic diagram of the three-dimensional structure of example one.

[0021] Figure 2 is a schematic diagram of the side structure of example one.

[0022] Figure 3 is Figure 2 A-A sectional view of the schematic diagram in

[0023] Figure 4 is Figure 3 the enlarged view of B in

[0024] Figure 5is the local structure section schematic diagram of the activity pole disengaging from the positioning hole in example one.

[0025] Figure 6 is the explosion schematic diagram of the local structure in example one.

[0026] Figure 7 is the local structure section schematic diagram of example two.

[0027] In the figure, 1, the mold frame; 11, the positioning hole; 12, the slide rail;

[0028] 2, the sliding block; 21, the limiting part; 22, the shaft hole; 221, the accommodating ring groove;

[0029] 3, the driving connecting rod; 31, the guide surface; 32, the stroke groove;

[0030] 4, the activity pole; 41, the shaft shoulder part;

[0031] 5, the spring; 6, the driving cylinder; 7, the roller; 8, the core; 9, the stop adjusting piece. DETAILED DESCRIPTION

[0032] The following is the specific embodiment of the present application and the technical scheme of the present application is further described with reference to the accompanying drawings, but the present application is not limited to these embodiments.

[0033] Example one:

[0034] As Figures 1-6The injection mold of the vehicle lamp part comprises a mold frame 1, a sliding block 2 and a driving link 3 for driving the sliding block 2 to move up and down. The sliding block 2 is provided with a transverse movable rod 4, the mold frame 1 is provided with a transverse positioning hole 11, one end of the movable rod 4 extends out of the sliding block 2 and is positioned in the positioning hole 11, the movable rod 4 has a tendency to move away from the side where the positioning hole 11 is located along the length direction, the other end of the movable rod 4 always abuts against the outer periphery of the driving link 3, the upper end of the driving link 3 is provided with an inclined guide surface 31, and the driving link 3 can move downward relative to the sliding block 2 to make the other end of the movable rod 4 slide along the guide surface 31 and at the same time make one end of the movable rod 4 disengage from the positioning hole 11. The mold frame 1 is the basic platform of the mold, the movable sliding block 2 and the movable core 8 are arranged on the mold frame 1, the sliding block 2 is used to cooperate with the movable core 8 to form an injection molding cavity, and the sliding block 2 can independently slide and directionally demold after the injection is completed, so as to avoid interference when the product with complex shape is demolded, and the driving link 3 is used to drive the sliding block 2 to reciprocatingly slide up and down. The transverse movable rod 4 is arranged in the sliding block 2, the positioning hole 11 is arranged on the surface of the mold frame 1 and is positioned and matched with one end of the movable rod 4, and the other end of the movable rod 4 abuts against the outer periphery of the driving link 3, so that the sliding block 2 is constrained by the movable rod 4 and the position of the sliding block 2 relative to the mold frame 1 is stable during the injection process. Even if the weight of the sliding block 2 is large, the dead weight will not act on the driving link 3, so as to avoid that the driving device which keeps in a locked state below the driving link 3 is subjected to long-time load and the sliding block 2 moves downward to affect the product quality. Meanwhile, the movable rod 4 has a tendency to move away from the side where the positioning hole 11 is located, and the guide surface 31 is arranged on the upper end of the driving link 3, so that when the driving link 3 moves downward relative to the sliding block 2, the other end of the movable rod 4 can slide along the guide surface 31 and at the same time one end of the movable rod 4 disengages from the positioning hole 11. Thus, one end of the movable rod 4 abuts against the mold frame 1 and the other end abuts against the guide surface 31 to limit the driving link 3 vertically when the mold is closed. When the mold is just closed, the driving link 3 continues to move upward relative to the sliding block 2 and pushes the movable rod 4 into the positioning hole 11 through the guide surface 31. When the mold is opened, the driving link 3 can move downward and gradually eliminate the transverse limitation of the other end of the movable rod 4 through the inclined guide surface 31. The movable rod 4 can overcome the frictional resistance and gradually disengage from the positioning hole 11 under the action of the tendency. After the movable rod 4 completely disengages from the positioning hole 11, the relative position of the other end of the movable rod 4 and the guide surface 31 does not change, the sliding block 2 moves downward with the driving link 3 to realize demolding, the independent reverse clamping insert arranged on the sliding block 2 has enough time to advance core-pulling before the sliding block 2 is demolded, the product is prevented from being damaged due to the falling of the sliding block 2, the speed state of the sliding block 2 does not fluctuate greatly during the demolding process, the product or the driving device is prevented from being damaged, and the product quality is further ensured. Specifically, the guide surface 31 is a tapered surface that contracts upward. Thus, even if the driving link 3 changes the circumferential angle, the guide surface 31 can always correctly guide the transverse movement position of the movable rod 4, and the operation is stable.The outer periphery of the drive link 3 has a stroke groove 32. A limiting part 21 is fixed on the slider 2. The limiting part 21 is located inside the stroke groove 32 and abuts against the lower side of the inner wall of the stroke groove 32 in the vertical direction. The drive link 3 can move downward relative to the slider 2 and cooperate with the movable rod 4. In this way, the stroke groove 32 and the limiting part 21 cooperate to limit the range of relative movement between the drive link 3 and the slider 2. When the movable rod 4 is locked, the lower side of the inner wall of the stroke groove 32 abuts against the limiting part 21. Even if the movable rod 4 fails to lock, the drive link 3 can still support the slider 2 to avoid affecting product quality. The other end of the movable rod 4 is rounded. This helps to reduce the frictional resistance when the other end of the movable rod 4 slides along the guide surface 31, improve the service life of the component, and make the lateral movement of the movable rod 4 smoother. A drive cylinder 6 is fixed on the mold frame 1, and the lower end of the drive link 3 is connected to the output end of the drive cylinder 6. The drive cylinder 6 can be a hydraulic cylinder, providing sufficient force to the slider 2 to ensure stable directional feeding of the drive linkage 3. The upper end of the drive linkage 3 is inserted into the slider 2, and a vertically arranged slide rail 12 is fixed on the mold frame 1, with the slider 2 slidably connected to the slide rail 12. This ensures the precise movement trajectory of the slider 2, thereby ensuring stable operation of the mechanism and guaranteeing the quality of the injection molded product. The injection mold also includes a core 8, and a stop adjustment piece 9 is detachably connected to the top of the slider 2, with the stop adjustment piece 9 abutting against the upper core 8. The core 8 serves as a stroke limit for the slider 2, meaning that when the slider 2 moves to the core 8, the movable rod 4 is precisely aligned with the positioning hole 11. When the drive linkage 3 continues to feed relative to the slider 2, it locks in place. The stop adjustment piece 9 is located on the top of the slider 2, making it easy for operators to remove and replace the stop adjustment piece 9 so that the movable rod 4 and the positioning hole 11 are precisely aligned when the stop adjustment piece 9 and the core 8 just abut, facilitating maintenance and adjustment.

[0035] like Figures 3-6 As shown, the slider 2 has a horizontally arranged shaft hole 22. The movable rod 4 is inserted into the shaft hole 22. A spring 5, which can be a compression spring, is sleeved around the movable rod 4. The movable rod 4 has a shoulder 41. One end of the spring 5 near the drive connecting rod 3 abuts against the shoulder 41, and the other end of the spring 5 abuts against the inner wall of the shaft hole 22. The spring 5 has a large elastic modulus, allowing the movable rod 4 to overcome friction and disengage from the positioning hole 11. In this way, the movable rod 4 is supported by the inner wall of the shaft hole 22 and the inner wall of the positioning hole 11, thus locking the slider 2. The spring 5 continuously and reliably applies force to the movable rod 4 through the shoulder 41 to maintain its movement tendency, thereby ensuring the stable operation of the movable rod 4. The inner wall of the shaft hole 22 has a receiving annular groove 221. The spring 5 and the shoulder 41 are both located in the receiving annular groove 221, and the other end of the spring 5 abuts against the inner wall of the receiving annular groove 221. The inner wall of the accommodating annular groove 221 can thus limit the movement of the movable rod 4, preventing the movable rod 4 from dislodging from the shaft hole 22 during operation and losing its engagement with the drive connecting rod 3.

[0036] Example 2:

[0037] As Figure 7 shown, the present embodiment is basically the same as Embodiment One, except that one end of the movable rod 4 is connected with a roller 7 that can roll along the inner wall of the positioning hole 11. In this way, when one end of the movable rod 4 is pulled out of the positioning hole 11, the friction caused by the weight of the sliding block 2 can be greatly reduced, so that the movable rod 4 can be smoothly pulled out and unlocked.

[0038] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without departing from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. An injection mold for a vehicle lamp component, comprising a mold frame (1), a slide (2) and a drive link (3) capable of driving the slide (2) to move up and down, characterized in that, The slider (2) is internally provided with a transversely arranged movable rod (4), the inner side wall of the mold frame (1) is provided with a positioning hole (11), one end of the movable rod (4) extends out of the slider (2) and is positioned and inserted into the positioning hole (11), the slider (2) is internally provided with a spring (5), both ends of the spring (5) act on the slider (2) and the movable rod (4) respectively, and the other end of the movable rod (4) abuts against the driving link (3) under the action of the spring (5), the upper end of the driving link (3) is provided with an inclined guide surface (31) on the outer periphery, the driving link (3) can move downward relative to the slider (2) to make the other end of the movable rod (4) slide along the guide surface (31) and simultaneously make one end of the movable rod (4) disengage from the positioning hole (11); the outer periphery of the driving link (3) is provided with a stroke groove (32), a limiting portion (21) is fixedly arranged on the slider (2), and the limiting portion (21) is located in the stroke groove (32) and limitingly abuts against the lower side of the inner wall of the stroke groove (32) in the upward and downward directions.

2. The injection mold for a vehicle lamp component according to claim 1, characterized in that, The slider (2) has an axle hole (22) therein, the movable rod (4) is inserted and matched in the axle hole (22), the movable rod (4) is provided with an axle shoulder portion (41), and the spring (5) is sleeved on the outer periphery of the movable rod (4), and the end of the spring (5) is arranged in abutment between the axle shoulder portion (41) and the inner wall of the axle hole (22).

3. The injection mold for a vehicle light component according to claim 2, characterized in that, The inner wall of the axle hole (22) is provided with a containing ring groove (221), and the spring (5) and the axle shoulder portion (41) are both located in the containing ring groove (221), and the end of the spring (5) abuts against the inner wall of the containing ring groove (221).

4. The injection mold for a vehicle lamp component according to claim 1 or 2, characterized in that, The other end of the movable rod (4) is in a round head shape.

5. The injection mold for a vehicle lamp component according to claim 1 or 2, characterized in that, The mold frame (1) is fixedly provided with a driving cylinder (6), and the lower end of the driving link (3) is connected with the output end of the driving cylinder (6).

6. The injection mold for a vehicle lamp component according to claim 1 or 2, characterized by, One end of the movable rod (4) is connected with a roller (7) which can roll along the inner wall of the positioning hole (11).

7. The injection mold for a vehicle lamp component according to claim 1 or 2, characterized by, The guide surface (31) is in a tapered surface shape which is contracted upward.

8. The injection mold for a vehicle lamp component according to claim 1 or 2, characterized by, The upper end of the driving link (3) is inserted into the slider (2), the mold frame (1) is fixedly provided with a vertically arranged slide rail (12), and the slider (2) is slidingly connected to the slide rail (12).

9. The injection mold for a vehicle lamp component according to claim 1 or 2, characterized in that, The injection mold further comprises a core (8), the top of the slider (2) is detachably connected with a stop adjusting piece (9), and the stop adjusting piece (9) limitingly abuts against the core (8) above.

Images