A hot runner injection mold

Abstract

The utility model discloses a hot runner injection mold, including fixed subassembly, the left and right sides of fixed subassembly all are provided with injection assembly, two injection assembly mutually far away's one side all is provided with stripping assembly, two stripping assembly mutually far away's one side all is provided with side mounting plate subassembly, through being provided with stripping assembly, can realize ejector pin subassembly's disassembly and replacement, need not to disassemble to whole stripping assembly, simultaneously, when needing to adjust ejector pin position or quantity to different specifications or shape's product, can according to actual demand, increase the installation or disassembly corresponding number of ejector pin, conveniently adjust ejector pin layout, improved the flexibility and adaptability of mould, through being provided with side mounting plate subassembly, can to the stable clamping and quick disassembly of material conveying pipe, significantly improved the convenience of material conveying pipe replacement and maintenance, reduced the downtime caused by material conveying pipe maintenance, further enhanced the overall adaptability and production efficiency of mould.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically a hot runner injection mold. Background Technology

[0002] Hot runner injection molding is an advanced injection molding technology. It combines multiple cavities in the mold with overlapping cavities in the mold closing direction, which is equivalent to combining multiple single-layer molds together to improve production efficiency and equipment utilization. This type of mold is particularly suitable for mass production of large, flat products and small, multi-cavity, thin-walled products, and can achieve a multiple increase in output without increasing the clamping force.

[0003] As disclosed in CN118952586A, this invention belongs to the field of injection mold technology, specifically a hot runner double-layer injection mold, including a fixed component. Two injection components are symmetrically slidably connected inside the fixed component. A demolding component is slidably connected to the other side of each injection component. An adjustment component is provided inside the fixed component. The fixed component includes an intermediate plate with a central hole inside, and a main plate inside the central hole. Each injection component includes two fixed plates, with a cavity inside each fixed plate. A movable plate is provided on the other side of each fixed plate, with a punch inside the movable plate. Multiple flow cavities are symmetrically arranged inside the punch. This injection mold has high injection efficiency, good injection effect, meets actual injection processing needs, is simple to operate, stable and efficient, and has stronger adaptability, higher controllability, and higher cleanliness. It also maintains the temperature of the molten material, resulting in stronger molten material flowability and higher injection precision.

[0004] The ejector pins of the hot runner double-layer injection mold proposed in the above-mentioned technology are not easy to disassemble. As a result, after long-term use of the mold, the ejector pins wear, deform, or have material adhering to their surface due to frequent contact with molten material and demolding friction. It is difficult to replace the ejector pin assembly with a new one. This not only affects the efficiency of normal mold maintenance, but also causes problems such as whitening, deformation, or even failure to demold smoothly due to ejector pin failure. This increases downtime and product defect rate in the production process. At the same time, when it is necessary to adjust the position or number of ejector pins for products of different specifications or shapes, it also limits the flexibility and adaptability of the mold. It is not easy to make personalized adjustments to the ejector pin layout, making it difficult to meet the diverse injection molding production needs. Summary of the Invention

[0005] The purpose of this invention is to provide a hot runner injection mold to solve the problem that the ejector pins of the hot runner double-layer injection mold mentioned above are not easy to disassemble. As a result, after long-term use of the mold, the ejector pins wear, deform, or have material adhering to their surface due to frequent contact with molten material and demolding friction. It is difficult to replace the ejector pin assembly with a new one, which not only affects the normal maintenance efficiency of the mold, but also causes problems such as whitening, deformation, or even failure to demold smoothly due to ejector pin failure. This increases downtime and product defect rate in the production process. At the same time, when it is necessary to adjust the position or number of ejector pins for products of different specifications or shapes, it also limits the flexibility and adaptability of the mold, making it difficult to conveniently personalize the ejector pin layout and meet the diverse injection molding production needs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hot runner injection mold, comprising a fixing component, injection components being provided on both the left and right sides of the fixing component, a demolding component being provided on the side of the two injection components that are far apart from each other, the two demolding components being symmetrical, and a side mounting plate assembly being provided on the side of the two demolding components that are far apart from each other, the two side mounting plate assemblies being symmetrical. The demolding assembly includes a follower plate, an installation assembly is provided on the front side of the follower plate, a connecting assembly 1 is provided inside the installation assembly, and connecting assemblies 2 are provided on both the upper and lower sides of the connecting assembly 1. The two connecting assemblies 2 are symmetrical to each other, and multiple demolding assemblies are provided inside the connecting assembly 1. The side mounting plate assembly includes a second fixing plate, the inside of which is provided with a material conveying pipe, and a fixing hole extending to the rear side is provided at the middle position of the front side of the second fixing plate.

[0007] Preferably, the mounting assembly includes a mounting frame, the rear side of which is fixedly connected to the front side of the follower plate. The upper and lower sides of the inner wall of the mounting frame are provided with mounting grooves. The two inner walls of the mounting grooves that are far apart from each other are provided with limiting holes that extend to the outside. The inner wall of the mounting groove is fixedly connected with a fixing block. The left and right sides of the inner wall of the mounting groove are provided with guide grooves.

[0008] Preferably, the connecting component one includes a fixing plate one, and the front side of the fixing plate one has a plurality of threaded holes extending to the rear side.

[0009] Preferably, the second connecting component includes a movable plate, the top of which has a fixed groove. A slider is fixedly connected to the upper left and right sides of the inner wall of the fixed groove. A lead screw is threadedly connected to the inner wall of the slider. A hexagonal groove is fixedly connected to the top of the lead screw. The bottom of the lead screw is rotatably connected to the top of the fixed block. The outer wall of the hexagonal groove is movably connected to the inner wall of the limiting hole. The outer wall of the movable plate is movably connected to the inner wall of the mounting groove. Guide plates are fixedly connected to both the left and right sides of the movable plate. The outer wall of the guide plates is movably connected to the inner wall of the guide groove. A concave plate is fixedly connected to the bottom of the movable plate. The inner wall of the concave plate is movably connected to the outer wall of the mounting frame.

[0010] Preferably, the demolding assembly includes an ejector pin, one end of which is fixedly connected to a lead screw, the outer wall of which is threadedly connected to the inner wall of a threaded hole.

[0011] Preferably, the lower front side of the second fixing plate has a drive hole extending to the rear side, and the top of the drive hole has a rectangular through hole extending into the fixing hole. A drive motor is fixedly installed on the right side of the lower front side of the second fixing plate. A bidirectional threaded rod is rotatably connected to the left side of the inner wall of the drive hole. The right end of the bidirectional threaded rod is fixedly connected to the output end of the drive motor. Two symmetrical sliders are threadedly connected to the outer wall of the bidirectional threaded rod. A connecting plate is fixedly connected to the top of the sliders. The outer wall of the connecting plate is movably connected to the inner wall of the rectangular through hole. A clamping block is fixedly connected to the top of the connecting plate. The two clamping blocks are symmetrical. The inner walls of the two clamping blocks are movably connected to the outer wall of the conveying pipe. Guide grooves are provided on both the left and right sides of the inner wall of the fixing hole.

[0012] Preferably, each of the two clamping blocks is fixedly connected to an insert plate on the side away from each other, and the outer wall of the insert plate is movably connected to the inner wall of the guide groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are: By incorporating a demolding assembly, the ejector pin assembly can be disassembled and replaced without disassembling the entire assembly, significantly reducing maintenance time and improving the efficiency of normal mold maintenance. This effectively avoids problems such as ejector pin malfunction leading to whitening, deformation, or even failure to demold smoothly, reducing downtime and product defect rates during production. Furthermore, when adjusting the position or number of ejector pins for products of different specifications or shapes, the corresponding number of ejector pins can be added or removed according to actual needs, allowing for convenient adjustment of the ejector pin layout. This meets diverse injection molding production requirements and enhances the flexibility and adaptability of the mold.

[0014] By incorporating a side mounting plate assembly, the feed tube can be stably clamped and quickly disassembled. When the feed tube requires maintenance due to blockages or wear caused by long-term use, the drive motor can be activated to rotate the bidirectional threaded rod, causing the two sliders to move away from or towards each other along the inner wall of the drive hole. This, in turn, drives the clamping block to move synchronously through the connecting plate, thereby releasing or clamping the feed tube. During the movement of the clamping block, the insert plate on its outer wall slides along the inner wall of the guide groove, ensuring the clamping stability of the feed tube. This significantly improves the convenience of feed tube replacement and maintenance, reduces downtime caused by feed tube maintenance, and further enhances the overall adaptability and production efficiency of the mold. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 This is a schematic diagram of the demolding assembly of this utility model; Figure 4 This is a schematic cross-sectional view of the installation component of this utility model; Figure 5 This is a schematic diagram of the structure of the connecting component of this utility model; Figure 6 This is a schematic diagram of the structure of the second connecting component of this utility model; Figure 7 This is a schematic diagram of the demolding assembly of this utility model; Figure 8 This is a structural cross-sectional schematic diagram of the side mounting plate assembly of this utility model.

[0016] In the diagram: 1. Fixed component; 2. Injection molding component; 3. Demolding component; 4. Side mounting plate assembly; 31. Follower plate; 32. Mounting component; 33. Connecting component one; 34. Connecting component two; 35. Demolding component; 321. Mounting frame; 322. Mounting groove; 323. Guide groove one; 324. Fixing block; 325. Limiting hole; 331. Fixing plate one; 332. Threaded hole; 341. Movable plate; 342. Fixed 343. Slider 1; 344. Lead screw 1; 345. Hexagonal groove body; 346. Guide plate; 347. Concave plate; 351. Ejector pin; 352. Lead screw 2; 41. Fixing plate 2; 42. Feed pipe; 43. Fixing hole; 44. Drive hole; 45. Rectangular through hole; 46. Drive motor; 47. Bidirectional threaded rod; 48. Slider 2; 49. Connecting plate; 40. Clamping block; 401. Guide groove 2; 402. Insert plate. 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 Figure 1-2 A hot runner injection mold includes a fixing component 1, injection components 2 are provided on both the left and right sides of the fixing component 1, demolding components 3 are provided on the side of the two injection components 2 that are far apart from each other, the two demolding components 3 are symmetrical, and side mounting plate components 4 are provided on the side of the two demolding components 3 that are far apart from each other, the two side mounting plate components 4 are symmetrical.

[0019] Please see Figure 3-7The demolding assembly 3 includes a follower plate 31, with a mounting assembly 32 on the front side of the follower plate 31. A connecting assembly 33 is located inside the mounting assembly 32. Connecting assemblies 34 are located on both the upper and lower sides of the connecting assembly 33, and the two connecting assemblies 34 are symmetrically positioned. Multiple demolding components 35 are located inside the connecting assembly 33. The mounting assembly 32 includes a mounting frame 321, with its rear side fixedly connected to the front side of the follower plate 31. Mounting grooves 322 are provided on both the upper and lower sides of the inner wall of the mounting frame 321. A through-hole extending to the outside is provided on the side of the inner wall of each of the two mounting grooves 322 that are far apart from each other. The limiting hole 325, the inner wall of the mounting groove 322 is fixedly connected to the fixing block 324, the left and right sides of the inner wall of the mounting groove 322 are provided with guide grooves 323, the connecting component 33 includes a fixing plate 331, the front side of the fixing plate 331 is provided with multiple threaded holes 332 extending to the rear side, the connecting component 34 includes a movable plate 341, the top of the movable plate 341 is provided with a fixing groove 342, the upper left and right sides of the inner wall of the fixing groove 342 are fixedly connected to the slider 343, the inner wall of the slider 343 is threadedly connected to the lead screw 344, the top of the lead screw 344 is fixedly connected to a hexagonal groove. The bottom of the hexagonal groove body 345 and the lead screw 344 are rotatably connected to the top of the fixed block 324. The outer wall of the hexagonal groove body 345 is movably connected to the inner wall of the limiting hole 325. The outer wall of the movable plate 341 is movably connected to the inner wall of the mounting groove 322. Guide plates 346 are fixedly connected to both sides of the movable plate 341. The outer wall of the guide plate 346 is movably connected to the inner wall of the guide groove 323. A concave plate 347 is fixedly connected to the bottom of the movable plate 341. The inner wall of the concave plate 347 is movably connected to the outer wall of the mounting frame 321. The demolding assembly 35 includes an ejector pin 351, one end of which is fixedly connected to a lead screw. The outer wall of the second lead screw 352 is threadedly connected to the inner wall of the threaded hole 332. When the ejector pin 351 needs to be replaced, first use a tool to insert into the hexagonal groove 345 and rotate it to drive the lead screw 344 to rotate. Since the lead screw 344 is threadedly connected to the slider 343 and the slider 343 is fixed in the fixing groove 342 of the movable plate 341, the movable plate 341 slides in the guide groove 323 of the mounting groove 322 through the guide plate 346, so that the movable plate 341 moves upward along the axis of the lead screw 344, thereby driving the concave plate 347 to disengage from the clamping of the mounting frame 321.Subsequently, by rotating the ejector pin 351, the lead screw 352 is unscrewed from the threaded hole 332 of the fixing plate 331, allowing the old ejector pin 351 to be removed. Then, the lead screw 352 at one end of the new ejector pin 351 is aligned with the threaded hole 332 and screwed in and tightened to ensure that the ejector pin 351 is securely installed. Moreover, the position or number of ejector pins can be adjusted according to different specifications or shapes of products. Afterward, the hexagonal groove 345 is rotated in the opposite direction, causing the lead screw 344 to drive the movable plate 341 to move downward, and the concave plate 347 re-fits against the outer wall of the mounting frame 321, limiting and fixing the connecting component 33. This completes the replacement operation of the ejector pin 351, making the ejector pin replacement process convenient and efficient, without the need to disassemble the entire demolding assembly, effectively saving maintenance time and labor costs.

[0020] Please see Figure 8The side mounting plate assembly 4 includes a second fixing plate 41. A feeding pipe 42 is disposed inside the second fixing plate 41. A fixing hole 43 extending to the rear is opened at the middle position of the front side of the second fixing plate 41. A driving hole 44 extending to the rear is opened at the lower front side of the second fixing plate 41. A rectangular through hole 45 extending into the fixing hole 43 is opened at the top of the driving hole 44. A drive motor 46 is fixedly mounted on the lower right side of the front side of the second fixing plate 41. A bidirectional threaded rod 47 is rotatably connected to the left side of the inner wall of the driving hole 44. The right end of the bidirectional threaded rod 47 is fixedly connected to the output end of the drive motor 46. The outer wall of the bidirectional threaded rod 47 is threaded... Two symmetrical sliders 48 are connected. A connecting plate 49 is fixedly connected to the top of each slider 48. The outer wall of the connecting plate 49 is movably connected to the inner wall of the rectangular through hole 45. A clamping block 40 is fixedly connected to the top of the connecting plate 49. The two clamping blocks 40 are symmetrical and their inner walls are movably connected to the outer wall of the conveying pipe 42. Guide grooves 401 are provided on both the left and right sides of the inner wall of the fixing hole 43. An insert plate 402 is fixedly connected to the side of each clamping block 40 that is far apart from each other. The outer wall of the insert plate 402 is movably connected to the inner wall of the guide groove 401. By starting the drive motor 46, the bidirectional threaded rod 47 is rotated, thereby... The two sliders 48 move closer to each other or further away from each other within the drive hole 44 along the axial direction of the bidirectional threaded rod 47. When the sliders 48 move, the connecting plate 49 fixedly connected to its top slides synchronously within the rectangular through hole 45, thereby moving the clamping block 40 on top of the connecting plate 49. When the feed pipe 42 needs to be installed, the drive motor 46 is controlled to rotate the bidirectional threaded rod 47 in the forward direction, causing the two sliders 48 to move away from each other, and also causing the two clamping blocks 40 to move away from each other. At this time, the feed pipe 42 is placed in the fixed hole 43, ensuring that it is between the two clamping blocks 40. Subsequently, the drive motor 46 is controlled to rotate the bidirectional threaded rod 47 in the forward direction. 7. When rotated in the opposite direction, the two sliders 48 move closer to each other, and the clamping blocks 40 move closer to each other and gradually contact the outer wall of the feed tube 42 until the feed tube 42 is clamped and fixed. During this process, the insert plate 402 on the side of the clamping blocks 40 that is away from each other will slide in the guide groove 401, providing guidance and stability for the movement of the clamping blocks 40, preventing the clamping blocks 40 from shifting during the movement, ensuring that the clamping of the feed tube 42 is more stable and reliable, making the installation and disassembly of the feed tube 42 quick and convenient, without the need for additional fastening tools, and can adapt to feed tubes of different diameters, improving the versatility and maintenance efficiency of the mold.

[0021] Working principle: When the ejector pin 351 needs to be replaced, first insert a tool into the hexagonal groove 345 and rotate it to drive the lead screw 344 to rotate. Since the lead screw 344 is threadedly connected to the slider 343 and the slider 343 is fixed in the fixing groove 342 of the movable plate 341, the movable plate 341 slides in the guide groove 323 of the mounting groove 322 through the guide plate 346, so that the movable plate 341 moves upward along the axis of the lead screw 344, thereby driving the concave plate 347 to disengage from the clamping of the mounting frame 321. Subsequently, by rotating the ejector pin 351, the second lead screw 352 is unscrewed from the threaded hole 332 of the first fixing plate 331, and the old ejector pin 351 can be removed. Then, the second lead screw 352 at one end of the new ejector pin 351 is aligned with the threaded hole 332 and screwed in and tightened to ensure that the ejector pin 351 is installed firmly. Moreover, the position or number of ejector pins can be adjusted according to different specifications or shapes of products. Afterwards, the hexagonal groove 345 is rotated in the opposite direction, so that the first lead screw 344 drives the movable plate 341 to move downward, and the concave plate 347 re-fits the outer wall of the mounting frame 321, limiting and fixing the first connecting component 33, thus completing the replacement operation of the ejector pin 351. This makes the ejector pin replacement process convenient and efficient, without the need to disassemble the entire demolding assembly, effectively saving maintenance time and labor costs. By starting the drive motor 46, the bidirectional threaded rod 47 is rotated, which in turn drives the two sliders 48 to move closer or further apart along the axial direction of the bidirectional threaded rod 47 within the drive hole 44. When the sliders 48 move, the connecting plate 49 fixedly connected to its top slides synchronously within the rectangular through hole 45, thereby moving the clamping block 40 on top of the connecting plate 49. When it is necessary to install the feed pipe 42, the drive motor 46 is controlled to rotate the bidirectional threaded rod 47 in the forward direction, causing the two sliders 48 to move away from each other, which in turn moves the two clamping blocks 40 away from each other. At this time, the feed pipe 42 is placed in the fixed hole 43, ensuring that it is between the two clamping blocks 40. Subsequently, the control... The drive motor 46 causes the bidirectional threaded rod 47 to rotate in the opposite direction, and the two sliders 48 move closer to each other. The clamping blocks 40 then move closer to each other and gradually contact the outer wall of the feed tube 42 until the feed tube 42 is clamped and fixed. During this process, the insert plate 402 on the side of the clamping blocks 40 that is away from each other will slide in the guide groove 401, providing guidance and stability for the movement of the clamping blocks 40, preventing the clamping blocks 40 from shifting during the movement, and ensuring that the clamping of the feed tube 42 is more stable and reliable. This makes the installation and disassembly of the feed tube 42 quick and convenient, without the need for additional fastening tools, and can adapt to feed tubes of different diameters, improving the versatility and maintenance efficiency of the mold.

[0022] 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 hot runner injection mold, comprising a fixing component (1), characterized in that: The fixing component (1) is provided with injection molding components (2) on both the left and right sides. The two injection molding components (2) are provided with demolding components (3) on the side away from each other. The two demolding components (3) are symmetrical. The two demolding components (3) are provided with side mounting plate components (4) on the side away from each other. The two side mounting plate components (4) are symmetrical. The demolding component (3) includes a follower plate (31), and an installation component (32) is provided on the front side of the follower plate (31). A first connecting component (33) is provided inside the installation component (32). A second connecting component (34) is provided on both the upper and lower sides of the first connecting component (33). The two second connecting components (34) are symmetrical to each other. A plurality of demolding components (35) are provided inside the first connecting component (33). The side mounting plate assembly (4) includes a second fixing plate (41), inside which a material conveying pipe (42) is provided, and a fixing hole (43) extending to the rear side is provided at the middle position of the front side of the second fixing plate (41).

2. A hot runner injection mold according to claim 1, characterized in that: The mounting assembly (32) includes a mounting frame (321), the rear side of which is fixedly connected to the front side of the follower plate (31). The upper and lower sides of the inner wall of the mounting frame (321) are provided with mounting grooves (322). The inner walls of the two mounting grooves (322) are provided with limiting holes (325) that extend to the outside on the side that is far apart from each other. The inner wall of the mounting groove (322) is fixedly connected with a fixing block (324). The left and right sides of the inner wall of the mounting groove (322) are provided with guide grooves (323).

3. A hot runner injection mold according to claim 1, characterized in that: The connecting component 1 (33) includes a fixing plate 1 (331), and the front side of the fixing plate 1 (331) has a plurality of threaded holes (332) extending to the rear side.

4. A hot runner injection mold according to claim 1, characterized in that: The connecting component two (34) includes a movable plate (341), the top of which is provided with a fixing groove (342). A slider one (343) is fixedly connected to the upper left and right sides of the inner wall of the fixing groove (342). A lead screw one (344) is threadedly connected to the inner wall of the slider one (343). A hexagonal groove body (345) is fixedly connected to the top of the lead screw one (344). The bottom of the lead screw one (344) is rotatably connected to the top of the fixing block (324). The outer wall of (345) is movably connected to the inner wall of the limiting hole (325), the outer wall of the movable plate (341) is movably connected to the inner wall of the mounting groove (322), guide plates (346) are fixedly connected to both the left and right sides of the movable plate (341), the outer wall of the guide plate (346) is movably connected to the inner wall of the guide groove (323), the bottom of the movable plate (341) is fixedly connected to the concave plate (347), and the inner wall of the concave plate (347) is movably connected to the outer wall of the mounting frame (321).

5. A hot runner injection mold according to claim 1, characterized in that: The demolding assembly (35) includes an ejector pin (351), one end of which is fixedly connected to a lead screw (352), the outer wall of which is threadedly connected to the inner wall of a threaded hole (332).

6. A hot runner injection mold according to claim 1, characterized in that: The lower front side of the second fixing plate (41) has a drive hole (44) extending to the rear side. The top of the drive hole (44) has a rectangular through hole (45) extending into the fixing hole (43). A drive motor (46) is fixedly installed on the right side of the lower front side of the second fixing plate (41). A bidirectional threaded rod (47) is rotatably connected to the left side of the inner wall of the drive hole (44). The right end of the bidirectional threaded rod (47) is fixedly connected to the output end of the drive motor (46). The outer wall is threaded with two symmetrical sliders (48). The top of the sliders (48) is fixedly connected to a connecting plate (49). The outer wall of the connecting plate (49) is movably connected to the inner wall of the rectangular through hole (45). The top of the connecting plate (49) is fixedly connected to a clamping block (40). The two clamping blocks (40) are symmetrical. The inner walls of the two clamping blocks (40) are movably connected to the outer wall of the conveying pipe (42). The left and right sides of the inner wall of the fixed hole (43) are provided with guide grooves (401).

7. A hot runner injection mold according to claim 6, characterized in that: Each of the two clamping blocks (40) is fixedly connected to a plate (402) on the side away from each other, and the outer wall of the plate (402) is movably connected to the inner wall of the guide groove (401).

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