A material leakage prevention sealing mechanism for an injection molding machine nozzle

Abstract

The utility model relates to injection molding machine nozzle technical field discloses a kind of injection molding machine nozzle material leakage prevention sealing mechanism, including injection head, the inside fixed connection of injection head has leakage prevention mechanism, the outer wall fixed connection of injection head has shell, the inner wall fixed connection of shell has anti-blocking component, the anti-blocking component is used to prevent liquid blockage, the leakage prevention mechanism includes fixed column, one end of the fixed column is fixedly connected in the inner wall bottom of injection head, the other end of the fixed column fixedly connected with bearing assembly, the inner wall bottom of bearing assembly fixedly connected with push plate. In the utility model, when injection head is pushed, striker triggers spring contraction, injection liquid flows into mould, after injection molding is completed, injection head rises, spring automatic rebound drives striker reset, tapered plug blocks bottom mouth, whole process does not need manual closing, automatic locking prevents leakage, let user focus on process control, significantly improve operating efficiency.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine nozzle technology, and in particular to an injection molding machine nozzle anti-leakage sealing mechanism. Background Technology

[0002] The injection molding machine nozzle is a core component connecting the injection molding machine barrel and the mold. It plays a crucial role in conveying molten plastic, controlling temperature, and preventing leakage, directly affecting the quality of injection molded products and production efficiency. Its core function is to accurately deliver molten material, smoothly guiding the plasticized molten plastic in the barrel into the mold gate through its own flow channel, ensuring that the molten material fills the cavity smoothly. The sealing effect between the nozzle and the mold gate sleeve directly determines the continuity of injection molding production, product quality, and production costs. In the development of injection molding technology, nozzle leakage has always been a common problem faced by the industry, which has led to a continuous demand for efficient leak-proof sealing mechanisms.

[0003] Material leakage leads to unstable molten material volume in the mold cavity, causing defects such as material shortages and shrinkage marks in the product. Furthermore, leaked molten material cannot be recycled due to oxidation from air contact or temperature fluctuations, directly resulting in material loss. Existing methods, such as increasing inspection frequency to check for leakage, temporarily patching the sealing surface with copper sheets and grinding to repair the radius after leakage is detected, and periodically replacing worn nozzles and sprue bushings, rely on operator experience, have a delayed response time, and cannot avoid downtime losses. Additionally, grinding and repair gradually reduce the sealing surface size, leading to a continuous decrease in fit accuracy, which fails to meet user requirements. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a leak-proof sealing mechanism for injection molding machine nozzles, aiming to improve the problem of injection liquid leakage in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a leak-proof sealing mechanism for an injection molding machine nozzle, comprising an injection head, an anti-leakage mechanism fixedly connected inside the injection head, a shell fixedly connected to the outer wall of the injection head, an anti-clogging component fixedly connected to the inner wall of the shell, the anti-clogging component being used to prevent liquid blockage, the leak-proof mechanism comprising a fixing post, one end of the fixing post being fixedly connected to the bottom of the inner wall of the injection head, the other end of the fixing post being fixedly connected to a bearing component, a push plate fixedly connected to the bottom of the inner wall of the bearing component, a spring-loaded component fixedly connected to the top of the push plate, a self-locking component fixedly connected to the bottom of the push plate, and a limit ring fixedly connected to the bottom of the bearing component.

[0006] As a further description of the above technical solution: The anti-clogging component includes a controller, the outer wall of which is fixedly connected to the top of the outer wall of the housing, a heating component is fixedly connected to the left side of the controller, a rectangular opening is provided on the top right side of the outer wall of the housing, and a filter component is fixedly connected to the top of the injection head.

[0007] As a further description of the above technical solution: The supporting component includes a cylindrical container, the bottom of which is fixedly connected to the left side of the outer wall of the fixed column, and a cylindrical groove is provided at the bottom of the cylindrical container.

[0008] As a further description of the above technical solution: The rebound assembly includes a spring, the bottom of which is fixedly connected to the top of the push plate, and a telescopic column is fixedly connected to the middle of the top of the push plate.

[0009] As a further description of the above technical solution: The self-locking assembly includes a striker, the top of which is fixedly connected to the bottom of the push plate, and a conical plug is fixedly connected to the outer wall of the striker.

[0010] As a further description of the above technical solution: The inner wall of the spring is slidably connected to the outer wall of the telescopic column, and the bottom of the telescopic column is fixedly connected to the bottom of the push plate.

[0011] As a further description of the above technical solution: The heating element includes a spiral heating tube, the top of which is fixedly connected to the outer wall of the controller, and the bottom of which is fixedly connected to an annular heating tube.

[0012] As a further description of the above technical solution: The filter assembly includes a sleeve, the outer wall of which is fixedly connected to the top of the injection head, and a honeycomb filter plate is fixedly connected to the inner wall of the sleeve.

[0013] This utility model has the following beneficial effects: 1. In this utility model, when the injection head is pushed, the impact pin triggers the spring to contract, and the injection liquid flows into the mold. After the injection is completed, the injection head rises, the spring automatically rebounds and drives the impact pin to reset, and the conical plug blocks the bottom opening. There is no need to manually close it throughout the process. It automatically locks and prevents leakage, saves manual steps, reduces errors, allows users to focus on process control, significantly improves operating efficiency, is suitable for batch injection molding scenarios, and saves users time and energy.

[0014] 2. In this utility model, the injection molding liquid is initially prevented from clogging by the honeycomb filter plate. If clogging occurs, there is no need to disassemble the injection head. The spiral and annular heating tubes are activated by the outer shell controller. The heat raises the temperature of the injection molding liquid, causing it to melt and be discharged, thus quickly clearing the blockage. This avoids a complicated disassembly process, reduces equipment downtime and component wear, reduces maintenance burden, ensures continuous and stable injection molding operations, and indirectly improves production efficiency. Attached Figure Description

[0015] Figure 1 This is a perspective view of the front side of the housing of an injection molding machine nozzle anti-leakage sealing mechanism proposed in this utility model; Figure 2 This is a cross-sectional view of the injection head structure of an injection molding machine nozzle anti-leakage sealing mechanism proposed in this utility model; Figure 3 This is an exploded view of the cylindrical container structure of the anti-leakage sealing mechanism for the nozzle of an injection molding machine proposed in this utility model; Figure 4 This is an exploded view of the outer shell structure of the anti-leakage sealing mechanism for the nozzle of an injection molding machine proposed in this utility model; Figure 5 This is a top view of the honeycomb filter plate structure of the anti-leakage sealing mechanism for injection molding machine nozzles proposed in this utility model.

[0016] Legend: 1. Injection head; 2. Leak-proof mechanism; 201. Fixing column; 202. Bearing component; 2021. Cylindrical container; 2022. Cylindrical groove; 203. Push plate; 204. Springback component; 2041. Spring; 2042. Telescopic column; 205. Self-locking component; 2051. Impact pin; 2052. Conical plug; 206. Limiting ring; 3. Anti-clogging component; 301. Controller; 302. Heating component; 3021. Spiral heating element; 3022. Annular heating element; 303. Rectangular opening; 304. Filter component; 3041. Sleeve; 3042. Honeycomb filter plate; 4. Outer shell. Detailed Implementation

[0017] 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.

[0018] Please see the appendix Figure 1 - Appendix Figure 3This utility model provides an embodiment of an injection molding machine nozzle anti-leakage sealing mechanism, including an injection head 1. An anti-leakage mechanism 2 is fixedly connected inside the injection head 1 to prevent leakage of injection liquid. A shell 4 is fixedly connected to the outer wall of the injection head 1. The anti-leakage mechanism 2 includes a fixing post 201. One end of the fixing post 201 is fixedly connected to the bottom of the inner wall of the injection head 1, and the other end of the fixing post 201 is fixedly connected to a bearing component 202 with an internal space placement structure. A push plate 203 is fixedly connected to the bottom of the inner wall of the bearing component 202. A spring-loaded component 204 is fixedly connected to the top of the push plate 203 to release the spring force. A self-locking component 205 is fixedly connected to the bottom of the push plate 203. A limit ring 206 is fixedly connected to the bottom of the bearing component 202 to allow the ejector pin 2051 to slide smoothly. Specifically, the injection head 1 has a leak-proof mechanism 2 inside, which is firmly installed inside the injection head 1 by a fixed connection. Its main function is to effectively prevent leakage of the injection liquid during the injection process. At the same time, an outer shell 4 is fixedly connected to the outer wall of the injection head 1. This outer shell 4 provides additional protection and support for the entire structure. The leak-proof mechanism 2 consists of multiple components, including a fixing post 201. One end of the fixing post 201 is tightly connected to the bottom of the inner wall of the injection head 1 by a fixed connection, while the other end of the fixing post 201 is fixedly connected to a load-bearing component 202. The internal design of the support component 202 has a certain amount of space, which can be used to place other related structures. In addition, a push plate 203 is fixedly connected to the bottom of the inner wall of the support component 202, and a spring-loaded component 204 is fixedly connected to the top of the push plate 203. This spring-loaded component 204 can release a certain amount of elastic force to achieve a specific function. A self-locking component 205 is also fixedly connected to the bottom of the push plate 203. This self-locking component 205 can play a locking role when needed. In addition, a limiting ring 206 is fixedly connected to the bottom of the support component 202. The presence of this limiting ring 206 allows the firing pin 2051 to slide smoothly within it, thereby ensuring the normal operation and stability of the entire mechanism.

[0019] Please see the appendix Figure 1 - Appendix Figure 3The bearing component 202 includes a cylindrical container 2021, the bottom of which is fixedly connected to the left side of the outer wall of the fixed column 201. A cylindrical groove 2022 is provided at the bottom of the cylindrical container 2021. The rebound component 204 includes a spring 2041, the bottom of which is fixedly connected to the top of the push plate 203. A telescopic column 2042 is fixedly connected to the middle of the top of the push plate 203. The self-locking component 205 includes a striking pin 2051, the top of which is fixedly connected to the bottom of the push plate 203. A conical plug 2052 is fixedly connected to the outer wall of the striking pin 2051. The inner wall of the spring 2041 is slidably connected to the outer wall of the telescopic column 2042. The bottom of the telescopic column 2042 is fixedly connected to the bottom of the push plate 203. Specifically, the bearing assembly 202 includes a cylindrical container 2021, the bottom of which is securely connected to the left side of the outer wall of the fixed column 201. A cylindrical groove 2022 is provided at the bottom of the cylindrical container 2021 for placing components. The rebound assembly 204 includes a spring 2041, the bottom of which is securely connected to the top of the push plate 203. A telescopic column 2042 is fixedly connected to the top center of the push plate 203. Releasing the spring force allows the firing pin 2051 to return to its original position. The self-locking assembly 205 includes a firing pin 2051, the top of which is fixedly connected to the bottom of the push plate 203. A conical plug 2052 is fixedly connected to the outer wall of the firing pin 2051 to automatically block liquid leakage. This structure allows the various components to cooperate and function stably.

[0020] Please see the appendix Figure 3 - Appendix Figure 5 An anti-clogging component 3 is fixedly connected to the inner wall of the outer casing 4. The anti-clogging component 3 is used to prevent liquid blockage. The anti-clogging component 3 includes a controller 301. The outer wall of the controller 301 is fixedly connected to the top of the outer wall of the outer casing 4. A heating component 302 is fixedly connected to the left side of the controller 301 to melt the internal injection molding liquid. A rectangular opening 303 is opened on the top right side of the outer wall of the outer casing 4. A filter component 304 is fixedly connected to the top of the injection head 1 to reduce accumulation. Specifically, an anti-clogging component 3 is fixedly connected to the inner wall of the outer casing 4. The main function of this anti-clogging component 3 is to prevent liquid blockage. The anti-clogging component 3 consists of multiple parts, including a controller 301. The outer wall of the controller 301 is firmly fixedly connected to the top of the outer wall of the outer casing 4. On the left side of the controller 301, a heating component 302 is also fixedly connected. The function of this heating component 302 is to melt the internal injection molding liquid, thereby avoiding blockage caused by temperature drop. In addition, a rectangular opening 303 is opened on the top right side of the outer wall of the outer casing 4, and a filter component 304 is fixedly connected to the top of the injection head 1. The presence of this filter component 304 can effectively reduce the possible accumulation during the injection molding process, further ensuring the normal operation of the entire device and the smooth progress of the injection molding work. Through this structure, the working efficiency of the equipment is improved, and the risk of failure caused by blockage or accumulation is greatly reduced.

[0021] Please see the appendix Figure 3 - Appendix Figure 5 The heating element 302 includes a spiral heating tube 3021, the top of which is fixedly connected to the outer wall of the controller 301, and an annular heating tube 3022 is fixedly connected to the bottom of the spiral heating tube 3021. The filter element 304 includes a sleeve 3041, the outer wall of which is fixedly connected to the top of the injection head 1, and a honeycomb filter plate 3042 is fixedly connected to the inner wall of the sleeve 3041. Specifically, the heating element 302 is mainly composed of a spiral heating tube 3021, the top of which is firmly connected to the outer wall of the controller 301, and the bottom of which is fixedly connected to an annular heating tube 3022, surrounding the outer wall of the injection head 1. The filter element 304 includes a sleeve 3041, the outer wall of which is tightly fixed to the top of the injection head 1. Meanwhile, a honeycomb filter plate 3042 is fixedly connected to the inner wall of the sleeve 3041 to filter the passing injection liquid.

[0022] Working principle: During injection molding, after the injection head 1 is pushed forward, the bottom ejector pin 2051 hits the mold to be injected. The top push plate 203 presses the spring 2041 upward, and the telescopic column 2042 retracts, causing the ejector pin 2051 to rise. The injection liquid inside the injection head 1 flows into the mold from the bottom opening for injection. After injection is completed, the injection head 1 rises, the spring 2041 releases its elasticity, causing the push plate 203 to rebound from the middle to the bottom of the inner wall of the cylindrical groove 2022, pushing the ejector pin 2051 back to the bottom. The conical plug 2052 on the outer wall blocks the bottom opening of the injection head 1 to prevent leakage. This automatic locking structure does not require user intervention and provides convenience for users. When the injection molding liquid enters the injection head 1 from the top, it passes through the honeycomb filter plate 3042 in the middle of the sleeve 3041, which can reduce clogging. When the injection molding liquid inside the injection head 1 is clogged, the controller 301 inside the housing 4 causes the fixed spiral heating tube 3021 and annular heating tube 3022 to heat up, raising the temperature of the injection molding liquid inside and melting it into a liquid state, so that it can be discharged from the bottom of the injection head 1. In this way, when there is a blockage, the user does not need to disassemble the injection head 1 to clear the blockage.

[0023] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof sealing mechanism for an injection molding machine nozzle, comprising an injection head (1), characterized in that: The injection head (1) is fixedly connected to a leak prevention mechanism (2), the outer wall of the injection head (1) is fixedly connected to a shell (4), and the inner wall of the shell (4) is fixedly connected to an anti-blocking component (3). The anti-blocking component (3) is used to prevent liquid blockage. The leak-proof mechanism (2) includes a fixed column (201), one end of which is fixedly connected to the bottom of the inner wall of the injection head (1), and the other end of which is fixedly connected to a bearing component (202). A push plate (203) is fixedly connected to the bottom of the inner wall of the bearing component (202), a spring-loaded component (204) is fixedly connected to the top of the push plate (203), a self-locking component (205) is fixedly connected to the bottom of the push plate (203), and a limit ring (206) is fixedly connected to the bottom of the bearing component (202).

2. The anti-leakage sealing mechanism for injection molding machine nozzles according to claim 1, characterized in that: The anti-clogging component (3) includes a controller (301), the outer wall of the controller (301) is fixedly connected to the top of the outer wall of the outer shell (4), a heating component (302) is fixedly connected to the left side of the controller (301), a rectangular opening (303) is provided on the right side of the top of the outer wall of the outer shell (4), and a filter component (304) is fixedly connected to the top of the injection head (1).

3. The anti-leakage sealing mechanism for injection molding machine nozzles according to claim 1, characterized in that: The supporting component (202) includes a cylindrical container (2021), the bottom of the outer wall of the cylindrical container (2021) is fixedly connected to the left side of the outer wall of the fixed column (201), and a cylindrical groove (2022) is provided at the bottom of the cylindrical container (2021).

4. The anti-leakage sealing mechanism for injection molding machine nozzles according to claim 1, characterized in that: The rebound assembly (204) includes a spring (2041), the bottom of which is fixedly connected to the top of the push plate (203), and a telescopic column (2042) is fixedly connected to the middle of the top of the push plate (203).

5. The anti-leakage sealing mechanism for injection molding machine nozzles according to claim 1, characterized in that: The self-locking assembly (205) includes a striker (2051), the top of which is fixedly connected to the bottom of the push plate (203), and a conical plug (2052) is fixedly connected to the outer wall of the striker (2051).

6. The anti-leakage sealing mechanism for injection molding machine nozzles according to claim 4, characterized in that: The inner wall of the spring (2041) is slidably connected to the outer wall of the telescopic column (2042), and the bottom of the telescopic column (2042) is fixedly connected to the bottom of the push plate (203).

7. The anti-leakage sealing mechanism for injection molding machine nozzles according to claim 2, characterized in that: The heating component (302) includes a spiral heating tube (3021), the top of which is fixedly connected to the outer wall of the controller (301), and the bottom of which is fixedly connected to an annular heating tube (3022).

8. The anti-leakage sealing mechanism for injection molding machine nozzles according to claim 2, characterized in that: The filter assembly (304) includes a sleeve (3041), the outer wall of which is fixedly connected to the top of the injection head (1), and a honeycomb filter plate (3042) is fixedly connected to the inner wall of the sleeve (3041).

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