Core pulling structure of automobile lamp shell injection mold and injection mold

Abstract

The utility model discloses a core pulling structure of an injection mold for an automobile lamp shell, and aims to solve the technical problem that an upper mold core cannot be pulled out smoothly after an injection molding process is finished due to the fact that the automobile lamp shell in the prior art has a plurality of recesses and complex outlines. The core pulling structure comprises an upper mold core, a first shrinkage block is arranged on the side surface of the upper mold core, a threaded barrel is connected to the inner wall of the first shrinkage block, a threaded rod is inserted into the threaded barrel, and a bearing is installed between the threaded rod and the upper mold core. According to the core pulling structure, when a driving motor operates, a threaded rod can be driven to rotate through a driving bevel gear and a driven bevel gear, the threaded rod rotates to drive a first contraction block to move towards the interior of an upper mold core through a threaded cylinder, and when a first telescopic rod contracts, a second contraction block can be pulled to move towards the interior of the upper mold core; and after the first shrinkage block and the second shrinkage block are inwards shrunk, the upper mold core can be smoothly pulled out from the interior of the automobile lamp shell, so that the production efficiency and the product quality of the automobile lamp shell are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and particularly relates to a core-pulling structure of an injection mold for an automobile lamp housing and the injection mold. Background Art

[0002] Automotive lamp housings are a crucial component of automotive lighting fixtures. They not only protect the bulb and internal components but also dissipate heat and enhance the vehicle's appearance. Injection molds for automotive lamp housings are a type of processing equipment used to produce these housings. These molds typically possess complex structures to meet the high precision and quality requirements of the lamp housings.

[0003] The existing injection mold has the following problems during use:

[0004] Due to the complex design of automotive lamp housings, particularly the presence of numerous recesses and intricate contours, the upper mold core (the molded portion of the upper mold) cannot be smoothly removed from the solidified housing after the injection molding process. This problem occurs primarily because the internal structure of the lamp housing restricts the mold release path, resulting in a tight fit or interference between the mold and the product, which in turn affects production efficiency and product quality. Utility Model Content

[0005] (1) Technical problems to be solved

[0006] In response to the shortcomings of the existing technology, the purpose of this utility model is to provide a core-pulling structure for an injection mold of an automotive lamp housing. This core-pulling structure is intended to solve the problem that the upper mold core (i.e., the molding portion of the upper mold) cannot be directly and smoothly removed from the interior of the solidified automotive lamp housing after the injection molding process due to the complex design of the automotive lamp housing in the existing technology, especially the presence of multiple recesses and complex contours. This situation occurs mainly because the internal structure of the automotive lamp housing restricts the mold demolding path, resulting in a tight fit or interference between the mold and the product, thereby affecting the production efficiency and product quality of the automotive lamp housing.

[0007] (2) Technical solution

[0008] In order to solve the above technical problems, the utility model provides a core-pulling structure of an injection mold for an automobile lamp shell, the core-pulling structure includes an upper mold core, a first shrinking block is provided on the side surface of the upper mold core, the inner wall of the first shrinking block is connected to a threaded cylinder, a threaded rod is inserted into the inside of the threaded cylinder, a bearing is installed between the threaded rod and the upper mold core, the end of the threaded rod is connected to an active bevel gear, a driving motor is installed inside the upper mold core, and the output end of the driving motor is connected to the active bevel gear, the bottom side of the first shrinking block is connected to a first slider, a first slide groove is provided on the surface of the upper mold core near the first slider, a second shrinking block is provided on the side surface of the upper mold core, a first telescopic rod is installed between the inner wall of the second shrinking block and the upper mold core, the bottom side of the second shrinking block is connected to a second slider, and a second slide groove is provided on the surface of the upper mold core near the second slider.

[0009] When using the core-pulling structure of the present technical solution, when the driving motor is running, the threaded rod can be driven to rotate through the active bevel gear and the driven bevel gear. The rotation of the threaded rod can drive the first shrinking block to move toward the interior of the upper mold core through the threaded cylinder. When the first telescopic rod is retracted, the second shrinking block can be pulled to move toward the interior of the upper mold core, thereby realizing the inward retraction of the first shrinking block and the second shrinking block.

[0010] Preferably, the threaded cylinder and the threaded rod are threadedly connected, the threaded rod forms a rotating structure with the upper die through the bearing, and the active bevel gear and the driven bevel gear form an engaging structure. When the drive motor is running, it can drive the active bevel gear to rotate, the rotation of the active bevel gear can drive the driven bevel gear to rotate, and the rotation of the driven bevel gear can drive the threaded rod to rotate.

[0011] Furthermore, the first slider is slidably connected to the upper mold core through the first slide groove. When the first shrinkage block is subjected to a force, it can drive the first slider to slide inside the first slide groove, thereby limiting the movement direction of the first shrinkage block.

[0012] Furthermore, a telescopic structure is formed between the second shrinking block and the first telescopic rod, and the second slider is slidably connected to the upper mold core through the second slide groove. When the second shrinking block is subjected to a force, it can drive the second slider to slide inside the second slide groove, thereby limiting the movement direction of the second shrinking block.

[0013] Disclosed is an injection mold for an automobile lamp shell, which includes an upper mold core-pulling mechanism, a lower mold mechanism, an upper mold mechanism, a guide column and an automobile lamp shell body. The upper mold core-pulling mechanism is installed on the bottom side of the upper mold mechanism, and the guide column is installed between the upper mold core-pulling mechanism and the lower mold mechanism. The automobile lamp shell body is located between the upper mold core-pulling mechanism and the lower mold mechanism; a liquid storage tank is provided on the side surface of the lower mold mechanism, and a liquid spray nozzle is connected to the outlet of the liquid storage tank. A second telescopic rod is installed inside the liquid storage tank, and the telescopic end of the second telescopic rod is connected to a push plate. A rubber ring is connected to the surface of the push plate, and the lower surface of the push plate is connected to the guide rod. The inner wall of the liquid storage tank is connected to a connecting block, and a guide circular hole is provided on the surface of the connecting block close to the guide rod.

[0014] Furthermore, a telescopic structure is formed between the push plate and the second telescopic rod, and a sealing structure is formed between the push plate and the liquid storage tank through the rubber ring. When the second telescopic rod is in operation, it can drive the push plate to move longitudinally.

[0015] Furthermore, the guide rod is slidably connected to the connecting block through the guide circular hole. When the push plate is subjected to a force, the guide rod can be driven to slide inside the guide circular hole, thereby limiting the movement direction of the push plate.

[0016] (3) Beneficial effects

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In the present invention, when the driving motor is running, it can drive the active bevel gear to rotate. The rotation of the active bevel gear can drive the driven bevel gear to rotate. The rotation of the driven bevel gear can drive the threaded rod to rotate inside the bearing. The rotation of the threaded rod can drive the threaded barrel to move laterally through the threaded connection relationship. The lateral movement of the threaded barrel can drive the first contraction block to move inside the upper mold core, and then the first telescopic rod can be moved. When the first telescopic rod contracts, it can pull the second contraction block to move inside the upper mold core. When the first and second contraction blocks are contracted inwardly, the upper mold core can be smoothly removed from the interior of the lamp housing, thereby improving the production efficiency and product quality of automobile lamp housings.

[0019] 2. In the utility model, when the second telescopic rod is in operation, the push plate can be squeezed to drive the rubber ring to move upward. The upward movement of the push plate can squeeze the lubricating liquid into the liquid spray nozzle and spray it out. The sprayed lubricating liquid can fall between the guide post and the lower mold mechanism. Therefore, when the injection mold is in operation, the connection between the guide post and the lower mold mechanism can be lubricated by the lubricating liquid, thereby avoiding wear of the lower mold mechanism when sliding on the guide post surface, thereby improving the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the main structure of a specific embodiment of the device of the utility model;

[0021] Figure 2 This is a schematic diagram of the upper die core pulling mechanism of a specific embodiment of the device of the utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the upper die core pulling mechanism of a specific embodiment of the device of the utility model;

[0023] Figure 4 This is a schematic diagram of the shrinkage block adjustment structure of a specific embodiment of the device of the utility model;

[0024] Figure 5 This is a schematic diagram of the first shrinking block after adjustment in a specific embodiment of the device of the utility model;

[0025] Figure 6 This is an exploded view of the shrinkage block connection structure of a specific embodiment of the device of the utility model;

[0026] Figure 7 This is a cross-sectional view of the lower mold structure of a specific embodiment of the device of the utility model;

[0027] Figure 8 This is a partial cross-sectional view of the lower mold structure of a specific embodiment of the device of the utility model;

[0028] Figure 9 This is an exploded view of the vehicle lamp housing structure according to a specific embodiment of the device of the utility model;

[0029] Figure 10 This is a cross-sectional view of the vehicle lamp housing structure of a specific embodiment of the device of the utility model.

[0030] The marks in the accompanying drawings are: 1. upper mold core pulling mechanism; 101. upper mold core; 102. first contraction block; 103. threaded cylinder; 104. threaded rod; 105. bearing; 106. driven bevel gear; 107. drive motor; 108. driving bevel gear; 109. first slider; 110. first slide; 111. second contraction block; 112. first telescopic rod; 113. second slider; 114. second slide; 2. lower mold mechanism; 3. upper mold mechanism; 4. guide column; 5. liquid storage tank; 6. liquid spray nozzle; 7. second telescopic rod; 8. push plate; 9. rubber ring; 10. guide rod; 11. connecting block; 12. guide circular hole; 13. lamp shell. DETAILED DESCRIPTION

[0031] This specific embodiment is a core-pulling structure of an automobile lamp housing injection mold, and its structural diagram is shown in FIG. Figure 2-6As shown, the core-pulling structure includes an upper mold core 101, a first shrinking block 102 is provided on the side surface of the upper mold core 101, a threaded cylinder 103 is connected to the inner wall of the first shrinking block 102, a threaded rod 104 is inserted into the interior of the threaded cylinder 103, a bearing 105 is installed between the threaded rod 104 and the upper mold core 101, an active bevel gear 108 is connected to the end of the threaded rod 104, a driving motor 107 is installed inside the upper mold core 101, and the output end of the driving motor 107 is connected to the active bevel gear 108. Gear 108, the bottom side of the first shrinking block 102 is connected to the first slider 109, and a first slide groove 110 is provided on the surface of the upper mold core 101 near the first slider 109, and a second shrinking block 111 is provided on the side surface of the upper mold core 101. A first telescopic rod 112 is installed between the inner wall of the second shrinking block 111 and the upper mold core 101, and the bottom side of the second shrinking block 111 is connected to the second slider 113, and a second slide groove 114 is provided on the surface of the upper mold core 101 near the second slider 113.

[0032] Among them, the threaded cylinder 103 and the threaded rod 104 are threadedly connected, the threaded rod 104 forms a rotating structure with the upper mold core 101 through the bearing 105, the active bevel gear 108 and the driven bevel gear 106 form an engagement structure, the first slider 109 forms a sliding connection with the upper mold core 101 through the first slide groove 110, the second contraction block 111 and the first telescopic rod 112 form a telescopic structure, and the second slider 113 forms a sliding connection with the upper mold core 101 through the second slide groove 114.

[0033] An injection mold for a car lamp housing, the structural diagram of which is shown as follows Figure 1 and 7 As shown in Figure 10, the injection mold includes an upper mold core-pulling mechanism 1, a lower mold mechanism 2, an upper mold mechanism 3, a guide column 4, and a lamp housing 13. The upper mold core-pulling mechanism 1 is installed on the bottom side of the upper mold mechanism 3. The guide column 4 is installed between the upper mold core-pulling mechanism 1 and the lower mold mechanism 2. The lamp housing 13 is located between the upper mold core-pulling mechanism 1 and the lower mold mechanism 2.

[0034] A liquid storage tank 5 is provided on the side surface of the lower mold mechanism 2, the outlet of the liquid storage tank 5 is connected to a liquid spray nozzle 6, a second telescopic rod 7 is installed inside the liquid storage tank 5, the telescopic end of the second telescopic rod 7 is connected to a push plate 8, the surface of the push plate 8 is connected to a rubber ring 9, the lower surface of the push plate 8 is connected to a guide rod 10, the inner wall of the liquid storage tank 5 is connected to a connecting block 11, and a guide circular hole 12 is provided on the surface of the connecting block 11 near the guide rod 10.

[0035] In addition, a telescopic structure is formed between the push plate 8 and the second telescopic rod 7 , a sealing structure is formed between the push plate 8 and the liquid storage tank 5 through the rubber ring 9 , and a sliding connection is formed between the guide rod 10 and the connecting block 11 through the guide circular hole 12 .

[0036] Working principle: When the device of the present technical solution is used, the driving motor 107 can be operated when the lamp housing 13 is cooled and needs to be demolded. When the driving motor 107 is running, it can drive the active bevel gear 108 to rotate. The rotation of the active bevel gear 108 can drive the driven bevel gear 106 to rotate. The rotation of the driven bevel gear 106 can drive the threaded rod 104 to rotate inside the bearing 105. The rotation of the threaded rod 104 can drive the threaded cylinder 103 to move laterally through the threaded connection relationship. The lateral movement of the threaded cylinder 103 can drive the first shrinking block 102 to move inside the upper mold core 101, and then the first telescopic rod 112 can be moved. When the first telescopic rod 112 contracts, it can pull the second shrinking block 111 to move inside the upper mold core 101. When the first shrinking block 102 and the second shrinking block 111 contract inwardly, the upper mold core 101 can be smoothly removed from the interior of the lamp housing 13.

[0037] First, lubricating liquid is injected into the liquid reservoir 5 and onto the upper surface of the push plate 8. When the second telescopic rod 7 is in operation, the push plate 8 can be squeezed to drive the rubber ring 9 to move upward. The upward movement of the push plate 8 can squeeze the lubricating liquid into the liquid spray nozzle 6 and spray it out. The sprayed lubricating liquid can fall between the guide column 4 and the lower mold mechanism 2, so that the connection between the guide column 4 and the lower mold mechanism 2 can be lubricated by the lubricating liquid when the injection mold is in operation.

[0038] All technical features in this embodiment can be freely combined according to actual needs.

[0039] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A core-pulling structure of an injection mold for an automobile lamp housing, the core-pulling structure comprising an upper mold core (101), characterized in that: The side surface of the upper mold core (101) is provided with a first shrinking block (102), the inner wall of the first shrinking block (102) is connected with a threaded cylinder (103), the interior of the threaded cylinder (103) is plugged with a threaded rod (104), a bearing (105) is installed between the threaded rod (104) and the upper mold core (101), the end of the threaded rod (104) is connected with an active bevel gear (108), a driving motor (107) is installed inside the upper mold core (101), the output end of the driving motor (107) is connected with the active bevel gear (108), the The bottom side of the first shrinking block (102) is connected to a first slider (109), a first slide groove (110) is provided on the surface of the upper mold core (101) near the first slider (109), a second shrinking block (111) is provided on the side surface of the upper mold core (101), a first telescopic rod (112) is installed between the inner wall of the second shrinking block (111) and the upper mold core (101), the bottom side of the second shrinking block (111) is connected to a second slider (113), and a second slide groove (114) is provided on the surface of the upper mold core (101) near the second slider (113).

2. The core-pulling structure of the automobile lamp housing injection mold according to claim 1, characterized in that: The threaded cylinder (103) and the threaded rod (104) are threadedly connected. The threaded rod (104) forms a rotating structure with the upper die core (101) through a bearing (105). The driving bevel gear (108) and the driven bevel gear (106) form a meshing structure.

3. The core-pulling structure of the automobile lamp housing injection mold according to claim 2, characterized in that: The first sliding block (109) is in sliding connection with the upper die core (101) via the first sliding groove (110).

4. The core-pulling structure of the automobile lamp housing injection mold according to claim 3, characterized in that: A telescopic structure is formed between the second contraction block (111) and the first telescopic rod (112), and the second sliding block (113) is slidably connected to the upper mold core (101) via the second sliding groove (114).

5. An automobile lamp housing injection mold, comprising a core-pulling structure of an automobile lamp housing injection mold according to any one of claims 1 to 4, the injection mold comprising an upper mold core-pulling mechanism (1), a lower mold mechanism (2), an upper mold mechanism (3), a guide column (4) and an automobile lamp housing (13), characterized in that: An upper die core pulling mechanism (1) is installed on the bottom side of the upper die mechanism (3), a guide column (4) is installed between the upper die core pulling mechanism (1) and the lower die mechanism (2), and the lamp housing shell (13) is located between the upper die core pulling mechanism (1) and the lower die mechanism (2); A liquid storage tank (5) is provided on the side surface of the lower mold mechanism (2), the outlet of the liquid storage tank (5) is connected to a liquid spray nozzle (6), a second telescopic rod (7) is installed inside the liquid storage tank (5), the telescopic end of the second telescopic rod (7) is connected to a push plate (8), the surface of the push plate (8) is connected to a rubber ring (9), the lower surface of the push plate (8) is connected to a guide rod (10), the inner wall of the liquid storage tank (5) is connected to a connecting block (11), and a guide circular hole (12) is provided on the surface of the connecting block (11) close to the guide rod (10).

6. The automobile lamp housing injection mold according to claim 5, characterized in that: A telescopic structure is formed between the push plate (8) and the second telescopic rod (7), and a sealing structure is formed between the push plate (8) and the liquid storage tank (5) via a rubber ring (9).

7. The automobile lamp housing injection mold according to claim 6, characterized in that: The guide rod (10) is slidably connected to the connecting block (11) via the guide circular hole (12).

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