Injection molds with self-cleaning function

Abstract

This utility model relates to the field of injection mold technology and discloses an injection mold with a self-cleaning function. It includes a support frame, a lower mold fixedly connected to the top of the support frame, an upper mold slidably connected to the top of the lower mold, a limit frame fixedly connected to the top of the lower mold, a hydraulic cylinder fixedly connected inside the limit frame, and the top of the upper mold fixedly connected to the output end of the hydraulic cylinder. A mold cavity is formed inside the lower mold, and a cleaning component is provided inside the lower mold. The cleaning component includes a lifting plate and a scraper, with the lifting plate slidably connected inside the lower mold. In this utility model, a hydraulic rod drives a beveled block to slide on a slide rail, thereby achieving the effect of simultaneous scraping and cleaning of the inner wall of the mold cavity by the scraper during the lifting and demolding process. This solves the problem of low efficiency caused by the need for manual cleaning or additional cleaning steps in traditional injection molds, and improves the automation level and production efficiency of mold cleaning.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to injection molds with self-cleaning function. Background Technology

[0002] Self-cleaning injection molds represent a significant development direction in modern injection molding technology. Widely used in plastic product manufacturing, injection molds directly impact product quality and production efficiency. With increasing industrial automation, mold demolding efficiency and cleaning capabilities have become key factors restricting production performance. Traditional molds often require manual intervention to clean residual materials or rely on additional cleaning equipment after demolding, increasing labor costs and causing production interruptions. Therefore, developing an automated mold structure capable of simultaneously cleaning the inner wall during demolding is crucial for improving the continuity of injection molding production and reducing maintenance costs.

[0003] Existing injection molds typically use ejector pins or push plate mechanisms to achieve demolding. The technical principle is to use mechanical linkage or hydraulic drive to push the ejector pins upward from the bottom of the mold cavity, thereby separating the molded product from the mold.

[0004] The main problem with existing technologies is the low efficiency of mold cleaning. Traditional demolding mechanisms can only eject the product and cannot simultaneously remove residual raw materials or flash from the inner wall of the cavity. This means that after each demolding, the machine must be stopped for manual cleaning or additional cleaning processes must be introduced. This process not only prolongs the production cycle, but also causes incomplete cleaning or mold damage due to the instability of human operation. Especially when continuously producing high-precision plastic parts, the accumulation of residues will directly affect the dimensional accuracy and surface quality of subsequent products, and in severe cases, even lead to the scrapping of the mold. Therefore, injection molds with self-cleaning functions are proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an injection mold with a self-cleaning function, which aims to improve the low efficiency caused by the need for manual cleaning or additional cleaning steps in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A self-cleaning injection mold includes a support frame, a lower mold fixedly connected to the top of the support frame, an upper mold slidably connected to the top of the lower mold, a limit frame fixedly connected to the top of the lower mold, a hydraulic cylinder fixedly connected inside the limit frame, the top of the upper mold fixedly connected to the output end of the hydraulic cylinder, a mold cavity opened inside the lower mold, and a cleaning component provided inside the lower mold.

[0008] The cleaning assembly includes a lifting plate and a scraper. The lifting plate is slidably connected inside the lower mold, and the bottom of the scraper is fixedly connected to the top of the lifting plate. Both the lifting plate and the scraper are slidably connected inside the mold cavity. The side wall of the scraper is in contact with the inner wall of the lower mold. The lower mold is provided with a lifting assembly, and a connecting column is fixedly connected to the side wall of the lower mold. A collection assembly is provided on one side of the connecting column.

[0009] As a further description of the above technical solution:

[0010] The lifting assembly includes a lifting column and a push plate. The top of the lifting column is fixedly connected to the bottom of the lifting plate, and the top of the push plate is fixedly connected to the bottom of the lifting column. The lifting column is slidably connected inside the lower mold.

[0011] As a further description of the above technical solution:

[0012] A positioning post is fixedly connected to the top of the push plate. The positioning post is slidably connected inside the lower mold. A spring is sleeved on the outer wall of the positioning post. One end of the spring is fixedly connected to the bottom of the lower mold, and the other end of the spring is fixedly connected to the top of the push plate.

[0013] As a further description of the above technical solution:

[0014] A notched block is fixedly connected to the bottom of the push plate, and a roller is rotatably connected to the bottom of the notched block. A slide rail is fixedly connected inside the support frame, and a sliding frame is slidably connected to the top of the slide rail. A beveled block is fixedly connected to the top of the sliding frame, and the outer wall of the beveled block is in contact with the outer wall of the roller. A hydraulic rod is fixedly connected inside the support frame, and the side wall of the beveled block is fixedly connected to the output end of the hydraulic rod.

[0015] As a further description of the above technical solution:

[0016] The collection component includes a collection frame and a sliding frame 2. One side of the collection frame is fixedly connected to one side of the connecting column, and the sliding frame 2 is slidably connected inside the collection frame.

[0017] As a further description of the above technical solution:

[0018] An intercepting net is installed inside the sliding frame 2, a duct is fixedly connected to the top of the collection frame, and an exhaust fan is installed at the bottom of the collection frame.

[0019] As a further description of the above technical solution:

[0020] A hollow column is fixedly connected inside the collection frame, and a sliding column is slidably connected inside the hollow column. A locking ball is fixedly connected to one end of the sliding column, and the locking ball engages with the sliding frame.

[0021] As a further description of the above technical solution:

[0022] A second spring is fitted on the outer wall of the sliding column. One end of the second spring is fixedly connected to the side wall of the ball, and the other end of the second spring is fixedly connected to the inner wall of the hollow column.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the inclined block is driven to slide on the slide rail by the hydraulic rod. Then, the inclined side of the inclined block contacts the roller and pushes the notch block to rise, which in turn drives the spring force of the push plate to move upward. This causes the lifting column to drive the lifting plate and scraper to slide in the mold cavity, thereby achieving the effect of scraping and cleaning the inner wall of the mold cavity simultaneously during the lifting and demolding process. This solves the problem of low efficiency caused by the need for manual cleaning or additional cleaning steps in traditional injection molds, and improves the automation level and production efficiency of mold cleaning.

[0025] 2. In this invention, an exhaust fan drives airflow, drawing injection molding debris through a duct into a collection frame. A mesh screen then intercepts the debris, preventing it from clogging the exhaust fan. Simultaneously, a sliding frame two can slide within the collection frame. When cleaning the collection frame is required, pulling the sliding column outwards disengages the retaining ball from the sliding frame two. The retaining ball remains in the unlocked state under the action of spring two, allowing the sliding frame two to be disassembled for debris removal. This makes debris collection and cleaning convenient and efficient, achieving rapid mold cleaning and solving the problem of inconvenient traditional mold debris cleaning, thus improving the convenience and cleaning efficiency of mold use. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the injection mold with self-cleaning function proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the lifting plate structure of the injection mold with self-cleaning function proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the push plate structure of the injection mold with self-cleaning function proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the interception mesh structure of the injection mold with self-cleaning function proposed in this utility model.

[0030] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0031] Legend:

[0032] 1. Support frame; 2. Lower mold; 3. Upper mold; 4. Limiting frame; 5. Hydraulic cylinder; 6. Mold cavity; 7. Lifting plate; 8. Scraper; 9. Positioning column; 10. Lifting column; 11. Hydraulic rod; 12. Push plate; 13. Spring 1; 14. Bevel block; 15. Slide rail; 16. Sliding frame 1; 17. Notch block; 18. Roller; 19. Connecting column; 20. Collection frame; 21. Air duct; 22. Exhaust fan; 23. Interception net; 24. Sliding frame 2; 25. Ball clamp; 26. Hollow column; 27. Sliding column; 28. Spring 2. Detailed Implementation

[0033] 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.

[0034] Reference Figures 1-5 An embodiment of this utility model provides a self-cleaning injection mold, including a support frame 1. The support frame 1 provides rigid support for the overall structure and ensures accurate positioning of each component. A lower mold 2 is fixedly connected to the top of the support frame 1. The lower mold 2 serves as the molding base and has a main cavity structure. An upper mold 3 is slidably connected to the top of the lower mold 2. The upper mold 3 and the lower mold 2 cooperate to form a complete cavity to complete injection molding. A limit frame 4 is fixedly connected to the top of the lower mold 2. The limit frame 4 constrains the movement trajectory of the upper mold 3 to ensure mold closing accuracy. A hydraulic cylinder 5 is fixedly connected inside the limit frame 4. The hydraulic cylinder 5 provides stable power output for mold opening and closing. The top of the upper mold 3 is fixedly connected to the output end of the hydraulic cylinder 5. A mold cavity 6 is opened inside the lower mold 2. The mold cavity 6 is a space for filling plastic melt and determines the final shape of the product. A cleaning component is set inside the lower mold 2. The cleaning component realizes the simultaneous completion of demolding and inner wall cleaning.

[0035] The cleaning assembly includes a lifting plate 7 and a scraper 8. The lifting plate 7 acts as a force-bearing carrier, transmitting the lifting force to the scraper 8. The lifting plate 7 is slidably connected inside the lower mold 2. The bottom of the scraper 8 is fixedly connected to the top of the lifting plate 7. The scraper 8 is in close contact with the inner wall of the mold cavity 6 to remove residual materials. Both the lifting plate 7 and the scraper 8 are slidably connected inside the mold cavity 6. The side wall of the scraper 8 fits against the inner wall of the lower mold 2 to ensure thorough cleaning. The lower mold 2 is equipped with a lifting assembly, which provides a power source for the cleaning mechanism. A connecting column 19 is fixedly connected to the side wall of the lower mold 2. The connecting column 19 serves as the mounting base for the collection assembly and maintains structural stability. A collection assembly is provided on one side of the connecting column 19. The collection assembly is used to receive and centrally process the scraped residual materials.

[0036] Reference Figures 1-5 The lifting assembly includes a lifting column 10 and a push plate 12. The top of the lifting column 10 is fixedly connected to the bottom of the lifting plate 7, and the lifting column 10 vertically transmits the pushing force to the lifting plate 7 to achieve the demolding action. The top of the push plate 12 is fixedly connected to the bottom of the lifting column 10. The push plate 12 serves as an intermediate connection between the lifting column 10 and the drive mechanism for power conversion. The lifting column 10 is slidably connected inside the lower mold 2. The slidable connection ensures the stability and straightness of the lifting column 10 during movement. A positioning column 9 is fixedly connected to the top of the push plate 12. The positioning column 9 restricts the movement trajectory of the push plate 12 to prevent deviation. The positioning column 9 is slidably connected inside the lower mold 2. A spring 13 is sleeved on the outer wall of the positioning column 9. The spring 13 provides a restoring force so that the push plate 12 automatically returns to its original position after demolding. One end of spring 13 is fixedly connected to the bottom of the lower mold 2, and the other end of spring 13 is fixedly connected to the top of push plate 12. A notch block 17 is fixedly connected to the bottom of push plate 12. The notch block 17 serves as a power transmission node, connecting roller 18 and push mechanism. Roller 18 is rotatably connected to the bottom of notch block 17. Roller 18 reduces contact resistance with inclined block 14 through rolling friction. A slide rail 15 is fixedly connected inside support frame 1. The slide rail 15 provides precise guidance for sliding frame 16 to ensure horizontal linear movement. Sliding frame 16 is slidably connected to the top of slide rail 15. Sliding frame 16 serves as the mounting base for inclined block 14 and moves along slide rail 15. Inclined block 14 is fixedly connected to the top of sliding frame 16. Inclined block 14 uses an inclined structure to guide horizontal movement. The motion is converted into vertical thrust. The outer wall of the inclined block 14 fits against the outer wall of the roller 18. A hydraulic rod 11 is fixedly connected inside the support frame 1. The hydraulic rod 11 serves as a power source to drive the sliding frame 16 to move horizontally. The side wall of the inclined block 14 is fixedly connected to the output end of the hydraulic rod 11. The collection assembly includes a collection frame 20 and a sliding frame 24. The collection frame 20 serves as a waste collection container and is fixed to the side of the mold. One side of the collection frame 20 is fixedly connected to one side of the connecting column 19. The sliding frame 24 is slidably connected inside the collection frame 20. The sliding frame 24 can be pulled out for easy cleaning of the collected waste. An intercepting net 23 is installed inside the sliding frame 24. The intercepting net 23 filters the airflow and intercepts the scraped waste particles. An air duct 21 is fixedly connected to the top of the collection frame 20. 1. A guide airflow draws waste into the collection frame 20. A fan 22 is installed at the bottom of the collection frame 20. The fan 22 generates negative pressure airflow to collect waste. A hollow column 26 is fixedly connected inside the collection frame 20. The hollow column 26 provides guidance and installation position for the sliding column 27. The sliding column 27 is slidably connected inside the hollow column 26. The sliding column 27 is the moving part of the locking mechanism. A locking ball 25 is fixedly connected to one end of the sliding column 27. The locking ball 25 engages with the sliding frame 24 to achieve the locking function of the collection frame 20. A spring 28 is sleeved on the outer wall of the sliding column 27. The spring 28 provides elasticity to maintain the locking state of the locking ball 25. One end of the spring 28 is fixedly connected to the side wall of the locking ball 25, and the other end of the spring 28 is fixedly connected to the inner wall of the hollow column 26.

[0037] Working principle: When this self-cleaning injection mold is working, the output end of the hydraulic rod 11 first extends, driving the inclined block 14 to slide on the slide rail 15. The outer wall of the inclined block 14 is in contact with the outer wall of the roller 18. As the inclined block 14 moves, its inclined side pushes the roller 18, causing the notch block 17 to rise. The notch block 17 drives the push plate 12 to rise, and the push plate 12 compresses the elastic force of the spring 13. At the same time, the push plate 12 drives the lifting plate 7 and the scraper 8 to slide upward in the mold cavity 6 through the lifting column 10. Since the side wall of the scraper 8 is in contact with the inner wall of the lower mold 2, during the upward sliding process... During the process, the scraper 8 scrapes and cleans the inner wall of the mold cavity 6, completing the initial cleaning of the inner wall of the mold cavity 6. After the injection molding process is completed, the output end of the hydraulic cylinder 5 drives the upper mold 3 to move upward to complete the demolding. The debris generated during the cleaning process is collected by the collection component. The collection frame 20 is fixed to the side wall of the lower mold 2 by the connecting column 19. The exhaust fan 22 is started, driving the airflow to draw the debris generated during injection molding into the collection frame 20 through the air duct 21. The interception net 23 is set inside the sliding frame 24 to intercept the debris entering the collection frame 20 and prevent the debris from clogging the exhaust fan 22. When the collection box 20 needs to be cleaned, pull the sliding post 27 outward. The sliding post 27 causes the locking ball 25 to disengage from the second sliding box 24. At this time, the second spring 28 is stretched and remains in the unlocked state under the action of the second spring 28. The second sliding box 24 can then be slid out of the collection box 20 for cleaning. After cleaning, slide the second sliding box 24 back into the collection box 20. The locking ball 25 is locked back into the second sliding box 24 under the elastic force of the second spring 28, thus completing the fixation.

[0038] 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. Injection mold with self-cleaning function, comprising a support frame (1), characterized in that: The support frame (1) is fixedly connected to the top of the lower mold (2), the lower mold (2) is slidably connected to the top of the upper mold (3), the lower mold (2) is fixedly connected to the top of the limit frame (4), the limit frame (4) is fixedly connected to the inside of the hydraulic cylinder (5), the upper mold (3) is fixedly connected to the top of the output end of the hydraulic cylinder (5), the lower mold (2) has a mold cavity (6) inside, and a cleaning component is provided inside the lower mold (2); The cleaning assembly includes a lifting plate (7) and a scraper (8). The lifting plate (7) is slidably connected inside the lower mold (2). The bottom of the scraper (8) is fixedly connected to the top of the lifting plate (7). Both the lifting plate (7) and the scraper (8) are slidably connected inside the mold cavity (6). The side wall of the scraper (8) is in contact with the inner wall of the lower mold (2). The lower mold (2) is provided with a lifting assembly. The side wall of the lower mold (2) is fixedly connected with a connecting column (19). A collection assembly is provided on one side of the connecting column (19).

2. The injection mold with self-cleaning function according to claim 1, characterized in that: The lifting assembly includes a lifting column (10) and a push plate (12). The top of the lifting column (10) is fixedly connected to the bottom of the lifting plate (7), and the top of the push plate (12) is fixedly connected to the bottom of the lifting column (10). The lifting column (10) is slidably connected inside the lower mold (2).

3. The injection mold with self-cleaning function according to claim 2, characterized in that: The top of the push plate (12) is fixedly connected to a positioning column (9), which is slidably connected inside the lower mold (2). A spring (13) is sleeved on the outer wall of the positioning column (9). One end of the spring (13) is fixedly connected to the bottom of the lower mold (2), and the other end of the spring (13) is fixedly connected to the top of the push plate (12).

4. The injection mold with self-cleaning function according to claim 3, characterized in that: The bottom of the push plate (12) is fixedly connected to a notch block (17), and the bottom of the notch block (17) is rotatably connected to a roller (18). The support frame (1) is fixedly connected to a slide rail (15), and the top of the slide rail (15) is slidably connected to a sliding frame (16). The top of the sliding frame (16) is fixedly connected to a beveled block (14), and the outer wall of the beveled block (14) is in contact with the outer wall of the roller (18). The support frame (1) is fixedly connected to a hydraulic rod (11), and the side wall of the beveled block (14) is fixedly connected to the output end of the hydraulic rod (11).

5. The injection mold with self-cleaning function according to claim 1, characterized in that: The collection component includes a collection frame (20) and a sliding frame (24). One side of the collection frame (20) is fixedly connected to one side of the connecting column (19), and the sliding frame (24) is slidably connected inside the collection frame (20).

6. The injection mold with self-cleaning function according to claim 5, characterized in that: The sliding frame (24) is equipped with an interception net (23), the top of the collection frame (20) is fixedly connected with an air duct (21), and the bottom of the collection frame (20) is equipped with an exhaust fan (22).

7. The injection mold with self-cleaning function according to claim 6, characterized in that: A hollow column (26) is fixedly connected inside the collection frame (20), and a sliding column (27) is slidably connected inside the hollow column (26). A locking ball (25) is fixedly connected to one end of the sliding column (27), and the locking ball (25) engages with the second sliding frame (24).

8. The injection mold with self-cleaning function according to claim 7, characterized in that: A second spring (28) is sleeved on the outer wall of the sliding column (27). One end of the second spring (28) is fixedly connected to the side wall of the ball (25), and the other end of the second spring (28) is fixedly connected to the inner wall of the hollow column (26).

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