Hot runner blocked self-cleaning injection mold

Abstract

The present application relates to hot runner mold field, especially to a kind of hot runner blockage self-cleaning injection mold, comprising: cylinder, the top end of the cylinder is equipped with feed inlet, needle valve is slidably connected in the cylinder;Connecting rod assembly, the connecting rod assembly is slidably connected in needle valve, first spring is fixedly connected between the connecting rod assembly and needle valve inner wall, the bottom of the connecting rod assembly is fixedly connected with fixed block, the bottom of the fixed block is fixedly connected with sealing cover, and the sealing cover seals the bottom of needle valve.This application is provided with needle valve, connecting rod assembly, fixed block and scraper, when the needle head end of cylinder is blocked, start first pusher assembly, so that two clamping blocks are close to needle valve direction, clamp needle valve, make several scrapers expose from the bottom of needle valve, so that several scrapers are close to needle head inner wall, then under the push of connecting rod assembly, the blockage impurities on the inside of needle head are cleaned by scraper, which is beneficial to avoid needle head blockage.

Description

Technical Field

[0001] This invention relates to the field of hot runner molds, and more particularly to a self-cleaning injection mold for hot runner blockage. Background Technology

[0002] Currently, the most commonly used injection molds in the injection molding industry are hot runner injection molds. Compared with ordinary molds, plastic products molded by hot runner systems are of higher quality. Hot runner systems also have advantages such as saving raw materials, improving production efficiency, and high automation. The working principle is that molten plastic is injected from the nozzle, passes through the mold's runner system, and enters the cavity to cool and solidify.

[0003] For example, utility model patent application number CN202120483433.2 discloses a self-cleaning hot runner nozzle for injection molds, including a heat-insulating spray pipe. An installation head is installed above the heat-insulating spray pipe, and a fixing head is installed at the middle position below the installation head. A heating rod is installed below the fixing head, and the fixing head and the heating rod are sealed together. A sealing tube is installed on the outside of the fixing head, and a high-temperature resistant sealing sheet is installed on the outside of the sealing tube. A metal lubrication tube is installed on the inner wall of the sealing tube. A through hole is provided at the rear end of the sealing tube, and the through hole penetrates the rear ends of the sealing tube, the high-temperature resistant sealing sheet, and the metal lubrication tube.

[0004] Regarding the above case, the following shortcomings exist in the injection molding process: For example, in a hot runner system for injection molds, the nozzle needle is located at the junction of the high-temperature melt and the low-temperature mold, which can cause the solution to cool down too quickly, resulting in the solution freezing and solidifying and adhering to the inner wall of the needle. Prolonged use can easily cause blockage at the tip of the nozzle needle.

[0005] To address this problem, the present invention proposes a self-cleaning injection mold for hot runner blockage. Summary of the Invention

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a self-cleaning injection mold for hot runner blockage, comprising: a cylinder, wherein a feed port is provided at the top of the cylinder, and a needle valve is slidably connected inside the cylinder; A connecting rod assembly is slidably connected inside the needle valve. A first spring is fixedly connected between the connecting rod assembly and the inner wall of the needle valve. A fixing block is fixedly connected to the bottom end of the connecting rod assembly. A sealing cover is fixedly connected to the bottom end of the fixing block. The sealing cover seals the bottom end of the needle valve. Two slots are symmetrically formed on the outer wall of the needle valve; Two locking blocks are symmetrically slidably connected to the inner side wall of the cylinder, corresponding to the positions of two locking slots. A first pushing component is provided at the end of each locking block for pushing the locking block to move and engage with the locking slot. Several scrapers, an array of which are slidably connected to a fixed block, are provided on the fixed block. A second pushing component is provided on the fixed block. The first pushing component is used to push the several scrapers to move closer to the inner wall of the cylinder needle.

[0007] Preferably, the connecting rod assembly includes: The upper sliding rod and the lower sliding rod are respectively fixedly connected to the upper sliding rod and the inner wall of the needle valve at both ends of the first spring, and the lower sliding rod is rotatably connected to the bottom end of the upper sliding rod; A drive groove is formed on the inner wall of the needle valve, and a sliding pin is fixedly connected to the outer wall of the lower sliding rod, and the sliding pin is slidably connected in the drive groove. The drive groove has a straight groove and an arc-shaped sliding groove.

[0008] Preferably, the second actuating component includes: Several sliding seats, an array of several said sliding seats, are slidably connected to the side wall of the fixed block, and the scraper is slidably connected to the end of the sliding seats; An annular connecting seat is slidably connected to the inner wall of the needle valve. A sliding rod is symmetrically fixedly connected to the bottom end of the sliding connecting seat. A limit groove is opened on the outer wall of the sliding rod. An annular connecting plate is rotatably connected to the bottom end of the annular connecting seat. A sliding sleeve is slidably connected to the outer wall of the slide rod. The sliding sleeve slides along the trajectory of the limiting groove. A second spring is fixedly connected between the sliding sleeve and the inner wall of the needle valve. The first connecting rod has its two ends rotatably connected to the side walls of the fixed block and the scraper, respectively. The second connecting rod has its two ends rotatably connected to the annular connecting plate and the first connecting plate, respectively.

[0009] Preferred options also include: Several housings are fixedly connected to a scraper, and several jet heads are fixedly connected to the sidewalls of the housings in an array; Several first connecting pipes, with their two ends respectively fixedly connected to the lower sliding rod and the housing; The second connecting pipe is fixedly connected to the upper sliding rod. The lower sliding rod and the upper sliding rod are centrally located pipes with interconnected internal spaces.

[0010] Preferably, the first actuating component includes; The mounting shell is fixedly connected to the bottom end of the cylinder, the locking block is slidably connected inside the mounting shell, the end of the locking block is fixedly connected to the mounting plate, and a third spring is fixedly connected between the mounting plate and the mounting shell; An inductive electromagnet is fixedly connected inside a mounting housing, and a magnet block is fixedly connected to the side wall of the mounting plate.

[0011] Preferred options also include: Two collection shells are symmetrically and slidably connected to the bottom of the mounting shell, and a suction pipe is fixedly connected to the side wall of one of the collection shells; The third pushing component works in conjunction with the moving card block. During the process of the card block moving and engaging with the card slot, the third pushing component pushes the two collecting shells to close, forming a closed space. The suction force of the suction pipe collects the cleaned impurities.

[0012] Preferably, the third actuation component includes: The L-shaped rack plate is fixedly connected to the end of the mounting plate. A first gear is engaged at the bottom end of the L-shaped rack plate, and a second gear is engaged on the side of the first gear. The shafts of the first gear and the second gear are rotatably connected to the side plate of the side wall of the mounting shell. The third gear is coaxially fixed with the second gear, and a drive rack is meshed on the side of the third gear. The drive rack is fixedly connected to the side wall of the collection shell. The radius of the second gear is smaller than that of the first gear, and the radius of the third gear is larger than that of the second gear.

[0013] Preferably, the top surface of the sealing cover is provided with a guide slope.

[0014] Preferably, the scraper is an inclined scraper.

[0015] Preferably, a pressure sensor is installed inside the cylinder to detect the pressure of the solution inside the cylinder. When the pressure inside the cylinder exceeds a threshold, the first pushing component is controlled by an external controller.

[0016] Compared with the prior art, the present invention has the following beneficial effects: I. This invention, by setting up a needle valve, a connecting rod assembly, a fixing block, and scrapers, activates a first pushing assembly when blockage occurs at the end of the needle tip in the cylinder. This causes two locking blocks to move closer to the needle valve, locking the needle valve in place. This causes several scrapers to protrude from the bottom of the needle valve and approach the inner wall of the needle tip. Then, under the push of the connecting rod assembly, the scrapers clean the blockage impurities inside the needle tip, which helps to prevent the needle tip from becoming blocked.

[0017] II. This invention, by setting up a first connecting rod and a second connecting rod, allows the connecting rod assembly to drive the fixed block downward after the needle valve is limited by the locking block. During the compression of the first spring, the annular connecting seat moves downward under the connecting action of the second connecting rod, causing the sliding rod to move downward until the sliding sleeve moves to the end of the limiting groove. This allows the scraper to first protrude from the bottom of the needle valve, avoiding interference between the scraper and the inner wall of the needle valve during its extension. Subsequently, under the action of the second spring, the second connecting rod pulls the first connecting rod, causing the first connecting rod to flip. As the sliding seat moves upward along the fixed block, the scraper moves closer to the inner wall of the needle. Through the thrust of the connecting rod assembly, the scraper removes impurities from the inner wall of the needle, preventing blockage at the tip of the needle.

[0018] Third, by setting an arc-shaped sliding groove, when relative movement occurs between the connecting rod assembly and the needle valve, the sliding pin first moves along the straight groove, causing the scraper to protrude from the bottom of the needle valve. Then, the driving pin moves along the arc-shaped sliding groove. Driven by the arc-shaped sliding groove, the lower sliding rod rotates, thereby driving several scrapers to rotate, reducing cleaning dead corners and improving the cleaning effect.

[0019] Fourth, by setting up a housing and an air jet head, the present invention supplies air to the first connecting pipe through an external air supply device during the process of scraping impurities from the inner wall of the needle by the scraper. Then, the air jet head blows high-pressure gas off the scraper and the inner wall of the needle. On the one hand, this helps to remove impurities remaining on the scraper and prevents impurities from entering the needle valve with the scraper. On the other hand, the high-pressure gas cleans the impurities from the inner wall of the needle, further improving the cleaning effect.

[0020] V. By setting up a collection shell and a washing pipe, the present invention drives the L-shaped rack plate to move during the movement of the mounting plate, causing the first gear to rotate. Under the action of the first gear and the second gear meshing, the second gear and the third gear rotate. The third gear meshes with the transmission rack plate, thereby driving the two collection shells to move closer to each other and close, forming a closed space. Then, the suction force of the suction pipe collects the cleaned impurities, preventing impurities from falling onto the equipment and causing pollution. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the cylindrical body of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the needle valve in this invention; Figure 5 for Figure 4 Enlarged view at point B in the middle; Figure 6 forFigure 4 Enlarged view at point C; Figure 7 This is a schematic diagram showing the connection between the drive groove and the needle valve in this invention; Figure 8 This is a schematic diagram showing the connection between the annular connecting seat and the slide rod in this invention; Figure 9 This is a schematic diagram showing the connection between the fixing block and the sealing cap in this invention; Figure 10 This is a schematic diagram showing the connection between the scraper and the sliding seat in this invention; Figure 11 This is a schematic diagram showing the connection between the collection shell and the mounting plate in this invention.

[0022] In the diagram: 1. Cylinder body; 101. Feed inlet; 2. Pressure sensor; 3. Needle valve; 301. Slot; 302. Drive slot; 4. Connecting rod assembly; 401. Upper sliding rod; 402. Lower sliding rod; 403. Sliding pin; 5. First spring; 6. Fixing block; 7. Sealing cover; 8. Sliding seat; 9. Scraper; 10. First connecting rod; 11. Second connecting rod; 12. Annular connecting seat; 13. Sliding rod; 1301. Limiting groove; 14. Annular connecting plate; 15. Sliding sleeve; 16. Second spring; 17. Housing; 18. Jet nozzle; 19. First connecting pipe; 20. Second connecting pipe; 21. Mounting shell; 22. Slot; 23. Mounting plate; 24. Magnet block; 25. Third spring; 26. Induction electromagnet; 27. Collection shell; 28. Suction pipe; 29. ​​L-shaped rack plate; 30. First gear; 31. Second gear; 32. Third gear; 33. Drive rack. Detailed Implementation

[0023] The following description is intended to disclose the invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0024] like Figures 1 to 11 The hot runner clogging self-cleaning injection mold shown includes: The cylinder 1 has a feed inlet 101 at the top and a needle valve 3 is slidably connected inside the cylinder 1. Connecting rod assembly 4 is slidably connected inside needle valve 3. A first spring 5 is fixedly connected between connecting rod assembly 4 and the inner wall of needle valve 3. A fixing block 6 is fixedly connected to the bottom end of connecting rod assembly 4. A sealing cover 7 is fixedly connected to the bottom end of fixing block 6. The sealing cover 7 seals the bottom end of needle valve 3. Two slots 301 are symmetrically opened on the outer wall of the needle valve 3; Two locking blocks 22 are symmetrically slidably connected to the inner wall of the cylinder 1 at positions corresponding to two locking slots 301. A first pushing component is provided at the end of the locking block 22 to push the locking block 22 to move and dock with the locking slot 301. Several scrapers 9 are slidably connected to a fixed block 6 in an array. A second pushing component is provided on the fixed block 6. The first pushing component is used to push the several scrapers 9 to move closer to the inner wall of the needle in the cylinder 1. In existing technologies, in hot runner systems for injection molds, the nozzle needle is located at the interface between the high-temperature melt and the low-temperature mold, which easily leads to excessive heat dissipation of the solution, causing it to freeze and solidify, adhering to the inner wall of the needle. Prolonged use can easily cause blockage at the tip of the nozzle needle. This technical solution can solve the above problems, and the specific operation is as follows: When the needle tip of the cylinder 1 is blocked, the first pushing component is activated, causing the two locking blocks 22 to move closer to the needle valve 3. Then, the external cylinder is activated, and the connecting rod assembly 4 is pushed downward by the cylinder. Under the action of the first spring 5, the needle valve 3 moves downward, so that the bottom end of the needle valve 3 seals the needle tip, preventing the solution in the cylinder 1 from flowing out of the needle tip. As the needle valve 3 moves downward to seal the needle, the locking block 22 moves along the locking groove 301 until the locking block 22 locks the needle valve 3, causing the needle valve 3 to stop moving downward. Subsequently, the connecting rod assembly 4 continues to move downward, the first spring 5 is compressed, and the connecting rod assembly 4 drives the fixing block 6 and the sealing cover 7 to move downward, so that several scrapers 9 are exposed from the bottom of the needle valve 3. Then, through the second pushing assembly, the several scrapers 9 are driven to move, so that the several scrapers 9 are close to the inner wall of the needle. Then, under the push of the connecting rod assembly 4, the scrapers 9 clean the blockage impurities inside the needle, which helps to prevent the needle from becoming blocked. After cleaning, the connecting rod assembly 4 moves upward. Under the pressure of the first spring 5, the connecting rod assembly 4 first drives the fixing block 6 and scraper 9 to move upward. Then, driven by the second pushing assembly, several scrapers 9 move away from the inside of the needle and retract into the needle valve 3. Then, the sealing cover 7 seals the bottom of the needle valve 3 and then drives the needle valve 3 to move upward together. This helps to prevent the solution from entering the needle valve 3 and contaminating the internal parts of the needle valve 3. When the needle is not blocked, the first pushing component is not activated, so that the needle valve 3 will not be limited by the jamming block 22 during its downward movement. This keeps the scraper 9 inside the needle valve 3 and prevents it from contacting the inner wall of the needle, thus avoiding excessive cleaning and damage to the inner wall of the needle.

[0025] As a further embodiment of the present invention, the second driving component includes: Several sliding seats 8 are slidably connected to the side wall of the fixed block 6 in an array, and a scraper 9 is slidably connected to the end of the sliding seats 8; An annular connecting seat 12 is slidably connected to the inner wall of needle valve 3. A slide rod 13 is symmetrically fixedly connected to the bottom end of the sliding connecting seat. A limit groove 1301 is opened on the outer wall of the slide rod 13. An annular connecting plate 14 is rotatably connected to the bottom end of the annular connecting seat 12. Sliding sleeve 15 is slidably connected to the outer wall of sliding rod 13. Sliding sleeve 15 slides along the trajectory of limiting groove 1301. A second spring 16 is fixedly connected between sliding sleeve 15 and the inner wall of needle valve 3. The first connecting rod 10 has its two ends rotatably connected to the side walls of the fixed block 6 and the scraper 9, respectively. The second connecting rod 11 is rotatably connected at both ends to the annular connecting plate 14 and the first connecting plate, respectively. Specifically, by setting the first connecting rod 10 and the second connecting rod 11, after the needle valve 3 is limited by the locking block 22, the connecting rod assembly 4 drives the fixing block 6 to move downward. During the compression of the first spring 5, under the connecting action of the second connecting rod 11, the annular connecting seat 12 moves downward, causing the slide rod 13 to move downward until the sliding sleeve 15 moves to the end of the limiting groove 1301, so that the scraper 9 first protrudes from the bottom of the needle valve 3, avoiding interference between the scraper 9 and the inner wall of the needle valve 3 during the extension process. Then, under the action of the second spring 16, the second connecting rod 11 pulls the first connecting rod 10, causing the first connecting rod 10 to flip. At the same time, the sliding seat 8 moves upward along the fixing block 6, and the scraper 9 moves closer to the inner wall of the needle. Through the thrust of the connecting rod assembly 4, the scraper 9 removes the impurities from the inner wall of the needle, preventing the needle tip from becoming blocked.

[0026] As a further embodiment of the present invention, the first pushing component includes; Mounting shell 21 is fixedly connected to the bottom end of cylinder 1. Locking block 22 is slidably connected inside mounting shell 21. Mounting plate 23 is fixedly connected to the end of locking block 22. A third spring 25 is fixedly connected between mounting plate 23 and mounting shell 21. An induction electromagnet 26 is fixedly connected inside the mounting housing 21, and a magnet block 24 is fixedly connected to the side wall of the mounting plate 23. Specifically, by setting up an induction electromagnet 26 and a magnet block 24, when cleaning is required, the circuit of the induction electromagnet 26 is turned on, so that the induction electromagnet 26 generates the same magnetic force as the magnet block 24. Under the action of like poles repelling each other, the mounting plate 23 drives the locking block 22 to move, thereby locking and limiting the needle valve 3.

[0027] It should be noted that a pressure sensor 2 is installed inside the cylinder 1 to detect the pressure of the solution inside the cylinder 1. When the pressure inside the cylinder 1 exceeds the threshold, the first push component is controlled by the external controller. When the pressure sensor 2 detects that the pressure of the solution inside the cylinder 1 exceeds the threshold, the circuit of the induction electromagnet 26 is turned on by the external controller, so that the induction electromagnet 26 generates the same magnetic force as the magnet block 24. Under the action of like poles repelling each other, the mounting plate 23 drives the locking block 22 to move, thereby locking and limiting the needle valve 3.

[0028] As a further embodiment of the present invention, the connecting rod assembly 4 includes: The upper sliding rod 401 and the lower sliding rod 402 are respectively fixedly connected to the upper sliding rod 401 and the inner wall of the needle valve 3 at both ends, and the lower sliding rod 402 is rotatably connected to the bottom end of the upper sliding rod 401; Drive groove 302 is formed on the inner wall of needle valve 3. A sliding pin 403 is fixedly connected to the outer wall of lower sliding rod 402. The sliding pin 403 is slidably connected in drive groove 302. The drive groove 302 has a straight groove and an arc-shaped sliding groove; Specifically, by setting an arc-shaped chute, when relative movement occurs between the connecting rod assembly 4 and the needle valve 3, the sliding pin 403 first moves along the straight groove, causing the scraper 9 to protrude from the bottom of the needle valve 3. Then, the driving pin moves along the arc-shaped chute, and under the drive of the arc-shaped chute, the lower sliding rod 402 rotates, thereby driving several scrapers 9 to rotate, reducing cleaning dead corners and improving the cleaning effect.

[0029] As a further embodiment of the present invention, it also includes: Several housings 17 are fixedly connected to the scraper 9, and several jet heads 18 are fixedly connected to the side wall array of the housings 17. Several first connecting pipes 19, with their two ends respectively fixedly connected to the lower sliding rod 402 and the housing 17; The second connecting pipe 20 is fixedly connected to the upper sliding rod 401. The lower sliding rod 402 and the upper sliding rod 401 are central tubes with interconnected internal spaces. Specifically, by setting up the housing 17 and the jet nozzle 18, during the process of scraping the impurities on the inner wall of the needle by the scraper 9, air is supplied to the first connecting pipe 19 through an external air supply device. Then, the jet nozzle 18 blows high-pressure gas off the scraper 9 and the inner wall of the needle. On the one hand, this helps to remove the impurities remaining on the scraper and prevents the impurities from entering the needle valve 3 along with the scraper 9. On the other hand, the high-pressure gas cleans the impurities on the inner wall of the needle, further improving the cleaning effect.

[0030] As a further embodiment of the present invention, it also includes: Two collection shells 27 are symmetrically and slidably connected to the bottom of the mounting shell 21, and a suction pipe 28 is fixedly connected to the side wall of one of the collection shells 27. The third pushing component moves in conjunction with the card block 22. During the process of the card block 22 moving and engaging with the card slot 301, the third pushing component pushes the two collection shells 27 to close, forming a closed space. The cleaning impurities are collected by the suction of the suction pipe 28. The third propulsion component includes: L-shaped rack plate 29 is fixedly connected to the end of mounting plate 23. The bottom end of L-shaped rack plate 29 is engaged with a first gear 30, and the side of the first gear 30 is engaged with a second gear 31. The shaft of the first gear 30 and the shaft of the second gear 31 are rotatably connected to the side plate of the side wall of mounting shell 21. The third gear 32 is coaxially fixed with the second gear 31. The third gear 32 has a drive rack 33 meshing on its side. The drive rack 33 is fixedly connected to the side wall of the collection shell 27. The radius of the second gear 31 is smaller than the radius of the first gear 30, and the radius of the third gear 32 is larger than the radius of the second gear 31; Specifically, by setting up the collection shell 27 and the washing pipe, the L-shaped rack plate 29 will be driven to move during the movement of the mounting plate 23, causing the first gear 30 to rotate. Under the action of the first gear 30 meshing with the second gear 31, the second gear 31 and the third gear 32 will rotate. The third gear 32 will mesh with the transmission rack plate, thereby driving the two collection shells 27 to move closer to each other and close, forming a closed space. Then, the suction force of the suction pipe 28 will collect the cleaned impurities, preventing impurities from falling onto the equipment and causing pollution.

[0031] As a further embodiment of the present invention, the top surface of the sealing cover 7 is provided with a guiding slope to guide the cleaned impurities and prevent the impurities from accumulating on the sealing cover 7.

[0032] As a further embodiment of the present invention, the scraper 9 is an inclined scraper 9, which increases the scraping area and reduces cleaning dead corners.

[0033] The working principle of this invention is as follows: When the needle tip of the cylinder 1 is blocked, the first pushing component is activated, causing the two locking blocks 22 to move closer to the needle valve 3. Then, the external cylinder is activated, and the connecting rod assembly 4 is pushed downward by the cylinder. Under the action of the first spring 5, the needle valve 3 moves downward, so that the bottom end of the needle valve 3 seals the needle tip, preventing the solution in the cylinder 1 from flowing out of the needle tip. As the needle valve 3 moves downward to seal the needle, the locking block 22 moves along the locking groove 301 until the locking block 22 locks the needle valve 3, causing the needle valve 3 to stop moving downward. Subsequently, the connecting rod assembly 4 continues to move downward, the first spring 5 is compressed, and the connecting rod assembly 4 drives the fixing block 6 and the sealing cover 7 to move downward, so that several scrapers 9 are exposed from the bottom of the needle valve 3. Then, through the second pushing assembly, the several scrapers 9 are driven to move, so that the several scrapers 9 are close to the inner wall of the needle. Then, under the push of the connecting rod assembly 4, the scrapers 9 clean the blockage impurities inside the needle, which helps to prevent the needle from becoming blocked. After cleaning, the connecting rod assembly 4 moves upward. Under the pressure of the first spring 5, the connecting rod assembly 4 first drives the fixing block 6 and scraper 9 to move upward. Then, driven by the second pushing assembly, several scrapers 9 move away from the inside of the needle and retract into the needle valve 3. Then, the sealing cover 7 seals the bottom of the needle valve 3 and then drives the needle valve 3 to move upward together. This helps to prevent the solution from entering the needle valve 3 and contaminating the internal parts of the needle valve 3. When the needle is not blocked, the first pushing component is not activated, so that the needle valve 3 will not be limited by the jamming block 22 during its downward movement. This keeps the scraper 9 inside the needle valve 3 and prevents it from contacting the inner wall of the needle, thus avoiding excessive cleaning and damage to the inner wall of the needle.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A self-cleaning injection mold for hot runner blockage, characterized in that, include: A cylinder (1) is provided with a feed inlet (101) at the top of the cylinder (1), and a needle valve (3) is slidably connected inside the cylinder (1). A connecting rod assembly (4) is slidably connected inside the needle valve (3). A first spring (5) is fixedly connected between the connecting rod assembly (4) and the inner wall of the needle valve (3). A fixing block (6) is fixedly connected to the bottom end of the connecting rod assembly (4). A sealing cover (7) is fixedly connected to the bottom end of the fixing block (6). The sealing cover (7) seals the bottom end of the needle valve (3). Two slots (301) are symmetrically opened on the outer wall of the needle valve (3); Two locking blocks (22) are symmetrically slidably connected to the inner wall of the cylinder (1) corresponding to the positions of the two locking slots (301). The end of the locking block (22) is provided with a first pushing component, which is used to push the locking block (22) to move and dock with the locking slot (301). Several scrapers (9) are slidably connected to a fixed block (6) and a second pushing component is provided on the fixed block (6). The first pushing component is used to push the several scrapers (9) to move closer to the inner wall of the needle in the cylinder (1).

2. The self-cleaning injection mold for hot runner blockage according to claim 1, characterized in that, The connecting rod assembly (4) includes: The upper sliding rod (401) and the lower sliding rod (402) are respectively fixedly connected at both ends of the first spring (5) to the inner wall of the upper sliding rod (401) and the needle valve (3), and the lower sliding rod (402) is rotatably connected to the bottom end of the upper sliding rod (401); A drive groove (302) is formed on the inner wall of the needle valve (3). A sliding pin (403) is fixedly connected to the outer wall of the lower sliding rod (402). The sliding pin (403) is slidably connected in the drive groove (302). The drive groove (302) has a straight groove and an arc-shaped sliding groove.

3. The self-cleaning injection mold for hot runner blockage according to claim 1, characterized in that, The second actuation component includes: Several sliding seats (8) are slidably connected to the side wall of the fixed block (6) in an array, and the scraper (9) is slidably connected to the end of the sliding seats (8); An annular connecting seat (12) is slidably connected to the inner wall of the needle valve (3). A sliding rod (13) is symmetrically fixedly connected to the bottom end of the sliding connecting seat. A limit groove (1301) is opened on the outer wall of the sliding rod (13). An annular connecting plate (14) is rotatably connected to the bottom end of the annular connecting seat (12). Sliding sleeve (15), the sliding sleeve (15) is slidably connected to the outer wall of the sliding rod (13), the sliding sleeve (15) slides along the trajectory of the limiting groove (1301), and a second spring (16) is fixedly connected between the sliding sleeve (15) and the inner wall of the needle valve (3). The first connecting rod (10) has its two ends rotatably connected to the side walls of the fixed block (6) and the scraper (9), respectively. The second connecting rod (11) is rotatably connected at both ends to the annular connecting plate (14) and the first connecting plate, respectively.

4. A self-cleaning injection mold for hot runner blockage according to claim 2, characterized in that, Also includes: Several housings (17) are fixedly connected to the scraper (9), and several jet heads (18) are fixedly connected to the side wall array of the housings (17). Several first connecting pipes (19) are fixedly connected at both ends to the lower sliding rod (402) and the housing (17), respectively; The second connecting pipe (20) is fixedly connected to the upper sliding rod (401). The lower sliding rod (402) and the upper sliding rod (401) are central tubes with interconnected internal spaces.

5. A self-cleaning injection mold for hot runner blockage according to claim 1, characterized in that, The first actuation component includes; Mounting shell (21), which is fixedly connected to the bottom end of cylinder (1), the locking block (22) is slidably connected inside the mounting shell (21), the end of the locking block (22) is fixedly connected to the mounting plate (23), and a third spring (25) is fixedly connected between the mounting plate (23) and the mounting shell (21). An induction electromagnet (26) is fixedly connected inside the mounting housing (21), and a magnet block (24) is fixedly connected to the side wall of the mounting plate (23).

6. A self-cleaning injection mold for hot runner blockage according to claim 5, characterized in that, Also includes: Two collection shells (27) are symmetrically slidably connected to the bottom of the mounting shell (21), and a suction pipe (28) is fixedly connected to the side wall of one of the collection shells (27). The third pushing component is linked with the movement of the card block (22). During the process of the card block (22) moving and engaging with the card slot (301), the third pushing component pushes the two collection shells (27) to close, forming a closed space. The cleaning impurities are collected by the suction force of the suction pipe (28).

7. A self-cleaning injection mold for hot runner blockage according to claim 6, characterized in that, The third propulsion component includes: L-shaped rack plate (29), the L-shaped rack plate (29) is fixedly connected to the end of the mounting plate (23), the bottom end of the L-shaped rack plate (29) is meshed with a first gear (30), the side of the first gear (30) is meshed with a second gear (31), the shaft of the first gear (30) and the shaft of the second gear (31) are rotatably connected to the side plate of the side wall of the mounting shell (21); The third gear (32) is coaxially fixed with the second gear (31), and a drive rack (33) meshes with the side of the third gear (32). The drive rack (33) is fixedly connected to the side wall of the collection shell (27). The radius of the second gear (31) is smaller than that of the first gear (30), and the radius of the third gear (32) is larger than that of the second gear (31).

8. A self-cleaning injection mold for hot runner blockage according to claim 1, characterized in that, The top surface of the sealing cap (7) is provided with a guide slope.

9. A self-cleaning injection mold for hot runner blockage according to claim 1, characterized in that, The scraper (9) is an inclined scraper (9).

10. A self-cleaning injection mold for hot runner blockage according to claim 1, characterized in that, The cylinder (1) is equipped with a pressure sensor (2) to detect the pressure of the solution inside the cylinder (1). When the pressure inside the cylinder (1) exceeds the threshold, the first push component is controlled by the external controller.

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