Injection mold glue inlet structure for preventing injection molded part from having burrs

Abstract

The utility model discloses a prevent injection molding part to have the injection mold structure of burr, be related to injection mold technical field, the utility model discloses a support frame is provided with sealing mechanism at the top, is used for reducing the gap of mould, the support frame top is provided with drive assembly, is used for driving clamping sealing mould, the utility model discloses a pull rod is pulled up, rotates the rotary rod and drives the rotary rod to rotate, when the rotary rod rotates, worm also can rotate, because the outer surface of worm and the outer surface of worm wheel are mutually engaged, when worm rotates, will drive the two worm wheels on its outer surface simultaneously rotate, when this connecting rod no.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and in particular relates to an injection mold injection structure for preventing burrs on injection molded parts. Background Technology

[0002] Injection molding is a process in which plastic material is heated and melted, injected into a mold cavity, and then cooled and solidified to form the desired shape. First, plastic granules are melted in the injection molding machine barrel by heating elements and the shearing action of the screw. The screw then propels the molten plastic forward, injecting it through a nozzle into the main runner of the mold, and then through the branch runners and gate into the cavity. The molten plastic cools and solidifies in the cavity, and the mold usually has a cooling system to accelerate cooling. After the plastic has completely solidified, the moving mold and the fixed mold separate, the ejector mechanism pushes the molded part out of the mold, and finally the mold closes, entering the next molding cycle.

[0003] Chinese patent CN219405078U discloses a silicone injection molding anti-burr and anti-overflow structure, including a base frame. A lower mold is fixedly installed on the top surface of the base frame, and an upper mold body assembly is provided on the top surface of the base frame. This invention uses a hydraulic rod to drive a movable plate, an upper mold body, and a frame to move vertically. The upper mold body is inserted into the interior of the lower mold, forming a molding cavity with the inner wall of the lower mold. The vertical movement of the frame causes one side of the frame to fit against the inclined surface of a sealing plate. The frame movement causes the sealing plate to move on the bottom surface of a groove, thereby causing a limiting plate to move inside a limiting groove, compressing a spring and sealing the sealing plate against the surface of the upper mold body to prevent overflow during injection molding and remove burrs. Liquid silicone is then injected into the molding cavity through an injection tube.

[0004] As shown above, the device seals the cavity inside the mold by relying on a spring to push it, but it is still unclear whether the spring force is greater than the pressure inside the cavity during pouring. Insufficient spring force causes the injection liquid to seep out from the gap, resulting in burrs on the injection molded part. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an injection mold injection structure that prevents burrs on injection molded parts, thus solving the problem of burrs on injection molded parts.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a glue injection structure for preventing burrs on injection molded parts, including a support frame, a sealing mechanism provided on the top of the support frame to reduce mold gap, and a driving component provided on the top of the support frame to drive the clamping and sealing mold. The sealing mechanism includes a placement rod fixed to the top of a support frame. The top of the placement rod contacts a lower mold, and the top of the lower mold contacts an upper mold. Several connecting frames are fixedly connected to the top of the support frame. A rotating frame is fixedly connected to one side of two connecting frames that are close to each other. A rotating rod is rotatably connected to the inner wall of the rotating frame. A limit plate is fixedly connected to the outer surface of the rotating rod. A pull rod is slidably connected to the inner wall of the rotating frame. A locking block is fixedly connected to the outer wall of the pull rod. A spring is fixedly connected to the outer wall of the locking block.

[0007] Preferably, the drive assembly includes a turntable fixed to the outer wall of a rotating rod. A worm gear is fixedly connected to the end of the rotating rod away from the turntable. A worm wheel is meshed with the outer surface of the worm gear. A connecting rod one is fixedly connected to the inner wall of the worm wheel. A connecting rod two is rotatably connected to the inner wall of the rotating frame. A movable frame is rotatably connected to the outer surface of the connecting rod two. A fixing block is fixedly connected to the outer wall of the movable frame. The outer surface of the connecting rod one is rotatably connected to the inner wall of the rotating frame, and the outer surface of the connecting rod one is rotatably connected to the inner wall of the movable frame.

[0008] Preferably, the top of the upper mold is provided with a leveling mechanism for leveling excess liquid at the pouring port. The leveling mechanism includes a slide rail fixed to the top of the upper mold, and a tension plate is slidably connected to the inner wall of the slide rail.

[0009] Preferably, a handle is fixedly connected to the outer wall of the stretching plate, a feeding pipe is fixedly connected to the inner wall of the stretching plate, the bottom of the feeding pipe penetrates the inner wall of the stretching plate and extends to the outside, and a feeding port is fixedly connected to the top of the feeding pipe.

[0010] Preferably, a limit block is fixedly connected to the outer wall of the stretching plate, a telescopic rod is fixedly connected to the bottom of the stretching plate, a scraper is fixedly connected to the bottom of the telescopic rod, a second spring is fixedly connected to the top of the scraper, and the end of the second spring away from the scraper is fixedly connected to the stretching plate.

[0011] Preferably, the outer surface of the locking block is engaged with the outer surface of the limiting disk, and one end of the spring away from the locking block is fixedly connected to the inner wall of the rotating frame.

[0012] This utility model has the following beneficial effects: 1. This injection mold injection structure prevents burrs on injection molded parts. By pulling up the pull rod, the turntable is rotated, causing the rotating rod to rotate. When the rotating rod rotates, the worm gear also rotates. Because the outer surface of the worm gear meshes with the outer surface of the worm wheel, when the worm gear rotates, it drives the two worm wheels located on its outer surface to rotate simultaneously. At this time, the connecting rod rotates, which drives the moving frame at the other end of the connecting rod to move, thereby causing the upper and lower fixed blocks to move closer to each other. This squeezes the gap between the lower mold and the upper mold, preventing gaps from forming and thus preventing burrs during injection.

[0013] 2. This injection mold injection structure, designed to prevent burrs on injection molded parts, uses a handle to move a tension plate fixed to its outer wall within a slide rail. When the bottom of the material tube aligns with the injection port of the upper mold, injection fluid is injected. The fluid flows through the inlet into the material tube and then into the lower and upper molds. After injection, excess fluid remains at the injection port of the upper mold. Pulling the handle moves the tension plate, causing a compression rod and spring fixed at its bottom to move simultaneously, scraping away the excess fluid at the injection port. This facilitates the removal of excess fluid, ensuring the integrity of the injection molded part.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the support frame structure of this utility model; Figure 3 This is a schematic diagram of the card block structure of this utility model; Figure 4 This is a schematic diagram of the turntable structure of this utility model; Figure 5 This is a schematic diagram of the tensile plate structure of this utility model; Figure 6 This is a schematic diagram of the scraper structure of this utility model.

[0017] The attached diagram lists the components represented by each number as follows: 1. Support frame; 2. Placement rod; 3. Lower mold; 4. Upper mold; 5. Connecting frame; 6. Rotating frame; 7. Rotating rod; 8. Limiting plate; 9. Spring 1; 10. Locking block; 11. Pull rod; 12. Turntable; 13. Worm gear; 14. Worm wheel; 15. Connecting rod 1; 16. Connecting rod 2; 17. Moving frame; 18. Fixing block; 19. Slide rail; 20. Stretching plate; 21. Feed tube; 22. Feed port; 23. Handle; 24. Limiting block; 25. Telescopic rod; 26. Spring 2; 27. Scraper. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This utility model provides two technical solutions: Figures 1-4 The first embodiment is shown: an injection mold injection structure for preventing burrs on injection molded parts, including a support frame 1, a sealing mechanism provided on the top of the support frame 1 for reducing mold clearance, and a drive assembly provided on the top of the support frame 1 for driving the clamping and sealing mold. The sealing mechanism includes a placement rod 2, which is fixed to the top of the support frame 1. The top of the placement rod 2 contacts the lower mold 3, and the top of the lower mold 3 contacts the upper mold 4. Several connecting frames 5 are fixedly connected to the top of the support frame 1. A rotating frame 6 is fixedly connected to the side of two connecting frames 5 that are close to each other. A rotating rod 7 is rotatably connected to the inner wall. A limit plate 8 is fixedly connected to the outer surface of the rotating rod 7. A pull rod 11 is slidably connected to the inner wall of the rotating frame 6. A locking block 10 is fixedly connected to the outer wall of the pull rod 11. A spring 9 is fixedly connected to the outer wall of the locking block 10. The drive assembly includes a turntable 12, which is fixed to the outer wall of the rotating rod 7. A worm gear 13 is fixedly connected to the end of the rotating rod 7 away from the turntable 12. A worm wheel 14 is meshed with the outer surface of the worm gear 13. A connecting rod 15 is fixedly connected to the inner wall of the worm wheel 14. A connecting rod 2 rotatably connects to the inner wall of the rotating frame 6. A movable frame 17 is rotatably connected to the outer surface of the connecting rod 2 16. A fixing block 18 is fixedly connected to the outer wall of the movable frame 17. The outer surface of the connecting rod 15 is rotatably connected to the inner wall of the rotating frame 6, and the outer surface of the connecting rod 15 is rotatably connected to the inner wall of the movable frame 17.

[0020] By pulling up the lever 11, the rotating turntable 12 causes the rotating rod 7, which is fixed on its outer wall, to rotate. When the rotating rod 7 rotates, the worm 13, which is fixed on its outer wall, also rotates. Because the outer surface of the worm 13 meshes with the outer surface of the worm wheel 14, when the worm 13 rotates, it causes the two worm wheels 14 on its outer surface to rotate simultaneously. At this time, the connecting rod 15, which is fixed on the inner wall of the worm wheel 14, rotates. When the connecting rod 15 rotates, it causes the moving frame 17 at the other end of the connecting rod 15 to move, thereby causing the upper and lower fixed blocks 18 to move towards each other. The moving frame 17 moves in a closer direction, thereby squeezing the gap between the lower mold 3 and the upper mold 4 to prevent gaps from forming and causing burrs during casting. While the moving frame 17 moves, the connecting rod 16, which rotates on its inner wall, also rotates inside the rotating frame 6, thus restricting the movement direction of the moving frame 17. After it is fixed, the pull rod 11 is released, and the compressed spring 9 will drive the pull rod 11 to move. At this time, the locking block 10, which is fixed on the outer wall of the pull rod 11, will engage with the limiting plate 8 on the outer surface of the rotating rod 7 to limit the movement.

[0021] Figures 1-6 The second embodiment is shown. The main difference from the first embodiment is that: a leveling mechanism is provided on the top of the upper mold 4 for leveling the excess liquid injected at the pouring port. The leveling mechanism includes a slide rail 19, which is fixed to the top of the upper mold 4. A tension plate 20 is slidably connected to the inner wall of the slide rail 19. A handle 23 is fixedly connected to the outer wall of the tension plate 20. A discharge pipe 21 is fixedly connected to the inner wall of the tension plate 20. The bottom of the discharge pipe 21 penetrates the inner wall of the tension plate 20 and extends to the outside. An inlet 22 is fixedly connected to the top of the discharge pipe 21. A limit block 24 is fixedly connected to the outer wall of the tension plate 20. A telescopic rod 25 is fixedly connected to the bottom of the tension plate 20. A scraper 27 is fixedly connected to the bottom of the telescopic rod 25. A second spring 26 is fixedly connected to the top of the scraper 27. The end of the second spring 26 away from the scraper 27 is fixedly connected to the tension plate 20. The outer surface of the locking block 10 is engaged with the outer surface of the limiting plate 8, and the end of the spring 9 away from the locking block 10 is fixedly connected to the inner wall of the rotating frame 6.

[0022] Pulling handle 23 causes the stretching plate 20, which is fixed on its outer wall, to slide inside the slide rail 19. When the bottom of the material tube 21 is aligned with the injection port of the upper mold 4, the casting liquid can be injected into it. It flows into the material tube 21 through the inlet 22 and then into the lower mold 3 and the upper mold 4. When the casting is completed, there will be excess casting liquid left in the injection port of the upper mold 4. At this time, pulling handle 23 causes the stretching plate 20 to move. When the stretching plate 20 moves, the telescopic rod 25 and the spring 26, which are fixed at its bottom and in a compressed state, will move at the same time, thereby scraping away the excess casting liquid at the injection port.

[0023] Furthermore, all content not described in detail in this specification is existing technology known to those skilled in the art, and the model parameters of each electrical component are not specifically limited; conventional equipment can be used.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sprue structure of an injection mold for preventing flash of an injection molded part, comprising a support frame (1), characterized in that: The support frame (1) is provided with a sealing mechanism at the top to reduce the mold gap, and the support frame (1) is provided with a driving assembly at the top to drive the clamping and sealing mold. The sealing mechanism includes a placement rod (2) fixed to the top of the support frame (1). The top of the placement rod (2) contacts the lower mold (3), and the top of the lower mold (3) contacts the upper mold (4). The top of the support frame (1) is fixedly connected to several connecting frames (5). A rotating frame (6) is fixedly connected to one side of two connecting frames (5) that are close to each other. A rotating rod (7) is rotatably connected to the inner wall of the rotating frame (6). A limit plate (8) is fixedly connected to the outer surface of the rotating rod (7). A pull rod (11) is slidably connected to the inner wall of the rotating frame (6). A locking block (10) is fixedly connected to the outer wall of the pull rod (11). A spring (9) is fixedly connected to the outer wall of the locking block (10).

2. The sprue bushing of claim 1, wherein the sprue bushing is configured to prevent the formation of flash on the injection molded part. The drive assembly includes a turntable (12) fixed to the outer wall of a rotating rod (7). A worm gear (13) is fixedly connected to one end of the rotating rod (7) away from the turntable (12). A worm wheel (14) is meshed with the outer surface of the worm gear (13). A connecting rod (15) is fixedly connected to the inner wall of the worm wheel (14). A connecting rod (16) is rotatably connected to the inner wall of the rotating frame (6). A moving frame (17) is rotatably connected to the outer surface of the connecting rod (16). A fixing block (18) is fixedly connected to the outer wall of the moving frame (17). The outer surface of the connecting rod (15) is rotatably connected to the inner wall of the rotating frame (6). The outer surface of the connecting rod (15) is rotatably connected to the inner wall of the moving frame (17). ​ 3. The sprue bushing of claim 1, wherein the sprue bushing is configured to prevent the formation of flash on the injection molded part. The upper mold (4) is provided with a leveling mechanism at the top for leveling excess liquid at the pouring port. The leveling mechanism includes a slide rail (19) fixed to the top of the upper mold (4), and a tension plate (20) is slidably connected to the inner wall of the slide rail (19).

4. The injection mold injection structure for preventing burrs on injection molded parts according to claim 3, characterized in that, A handle (23) is fixedly connected to the outer wall of the stretching plate (20), and a feeding pipe (21) is fixedly connected to the inner wall of the stretching plate (20). The bottom of the feeding pipe (21) penetrates the inner wall of the stretching plate (20) and extends to the outside. A feed inlet (22) is fixedly connected to the top of the feeding pipe (21).

5. The sprue bushing of claim 4, wherein the sprue bushing is configured to be positioned in a mold cavity of an injection mold. The outer wall of the stretching plate (20) is fixedly connected to a limit block (24), the bottom of the stretching plate (20) is fixedly connected to a telescopic rod (25), the bottom of the telescopic rod (25) is fixedly connected to a scraper (27), the top of the scraper (27) is fixedly connected to a spring (26), and the end of the spring (26) away from the scraper (27) is fixedly connected to the stretching plate (20).

6. The gate structure of the injection mold for preventing flash of an injection molded part according to claim 1, wherein The outer surface of the locking block (10) is engaged with the outer surface of the limiting plate (8), and the end of the spring (9) away from the locking block (10) is fixedly connected to the inner wall of the rotating frame (6).

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