An anti-clogging structure for an injection molding machine and the injection molding machine thereof.

Abstract

This invention relates to the field of injection molding machine technology, specifically to an anti-clogging structure and injection molding machine for an injection molding machine. The structure includes a vertical tube and a pressure relief pipe inserted into the middle of the vertical tube. The vertical tube is fixedly installed inside a conical head. This anti-clogging structure and injection molding machine can lift the end cap upwards when blockage occurs at the end of the barrel, connecting the vertical channel with the axial channel to relieve pressure inside the barrel and prevent blockage, thus avoiding oil leakage or cylinder explosion. When the end cap moves upwards, it pulls the sealing pipe through a connecting ring and a transmission mechanism, opening the guide channel and ensuring that the extruded molten plastic can re-enter the barrel from the end of the guide channel, achieving internal filling of the barrel and ensuring continued operation of the equipment. Simultaneously, to relieve pressure, a locking block supports the bottom of the connecting ring, ensuring that subsequent cylinder extrusion does not require further force to lift the end cap upwards.

Description

Technical Field

[0001] This invention relates to the field of injection molding machine technology, specifically to an anti-clogging structure for injection molding machines and the injection molding machine thereof. Background Technology

[0002] Injection molding machines melt and convey plastic granules through a screw and barrel. However, after the molten plastic reaches the end of the barrel, a hydraulic cylinder is needed to push the screw. The end of the barrel has a tapered structure, making it prone to clogging. This can lead to excessive pressure in the barrel, making it difficult for the hydraulic cylinder to move, ultimately causing the cylinder to burst or leak oil. Clogging is partly caused by incomplete melting of the plastic granules or the presence of impurities within the granules; these are low-probability events, but unavoidable.

[0003] In existing technologies, when faced with such blockages, the usual approach is to have personnel shut down the machine for maintenance. If the blockage is at the end of the cylinder, maintenance simply requires disassembling and replacing the tapered head at the end of the cylinder. However, if the cylinder explodes or leaks oil, the entire maintenance process will take much longer because it involves replenishing hydraulic oil, adjusting the pressure of the oil station, and even replacing the cylinder.

[0004] Therefore, it is necessary to design an anti-clogging structure for injection molding machines and an injection molding machine that can depressurize the inside of the barrel to prevent blockage when blockage occurs at the end of the barrel, thus avoiding oil leakage or cylinder explosion. Summary of the Invention

[0005] To address the aforementioned technical deficiencies, the purpose of this invention is to provide an anti-clogging structure for an injection molding machine and the injection molding machine thereof, which can relieve pressure inside the barrel to prevent blockage when blockage occurs at the end of the barrel, thereby avoiding oil leakage or cylinder explosion.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: The present invention provides an anti-clogging structure for an injection molding machine and the injection molding machine thereof, including a vertical tube and a pressure relief pipe inserted into the middle of the vertical tube. The vertical tube is fixedly installed inside a conical head, and the middle part of the vertical tube is connected to the central channel of the conical head through a horizontal channel. The vertical tube is provided with a vertical channel in a vertical direction, and the vertical channel is connected to the horizontal channel. A sealing ring step is provided at the junction of the vertical channel and the horizontal channel. The sealing ring step is located inside the vertical channel. The end of the pressure relief pipe is inserted into the horizontal channel. The end of the pressure relief pipe is provided with a cap. An elastic clamp is fixedly provided at the top of the pressure relief pipe. The elastic clamp is used to press the pressure relief pipe into the sealing ring step.

[0007] Preferably, it also includes a guide tube and a sealing tube. One end of the guide tube is connected to the interior of the mold cavity. A sleeve is provided at the bottom of the guide tube. The top of the pressure relief tube is inserted into the sleeve. The pressure relief tube has a feed hole that communicates with its interior. A guide channel is provided in the middle of the guide tube. The sleeve is connected to the guide channel. The sealing tube can be horizontally slidably inserted into the guide channel. The diameter of the guide channel is larger than the diameter of the sealing tube. The end of the guide channel is a tapered structure. The end of the sealing tube is provided with a tapered head that fits with the end of the guide channel. A connecting ring is fixedly provided on the outer edge of the pressure relief tube. The connecting ring is connected to one end of the sealing tube through a transmission mechanism. The transmission mechanism is used to convert the vertical upward force of the pressure relief tube into the horizontal force of the sealing tube.

[0008] Preferably, the transmission mechanism includes a hinge rod and a rotating seat. The upper sliding column is fixedly connected to the sealing tube, the lower sliding column is fixedly connected to the connecting ring, the rotating seat is fixedly installed on the material cylinder, the middle part of the hinge rod is hinged to the rotating seat, and the two ends of the hinge rod are provided with waist-shaped holes for the upper and lower sliding columns to slide.

[0009] Preferably, the elastic clamping device includes multiple disc springs. The top of the connecting ring one is provided with a circular step, and the multiple disc springs are sleeved on the outer edge of the circular step. The bottom of the sleeve one is fixedly provided with a sleeve two, and the circular step is inserted into the sleeve two. A blocking ring is fixedly provided on the bottom outer edge of the sleeve two. The topmost disc spring abuts against the blocking ring, and the bottommost disc spring abuts against the top of the connecting ring one.

[0010] Preferably, it also includes a locking mechanism, which is fixedly installed on the mold and is used to support the bottom of the raised connecting ring.

[0011] Preferably, the locking mechanism includes a locking block, a guide post, a spring, and a guide seat. The guide seat is fixedly installed on the mold, the guide post is horizontally slidable on the guide seat, the locking block is fixedly installed on the guide post, the spring provides elastic force to the locking block toward the connecting ring, and the end of the locking block that is in contact with the connecting ring has a stepped structure.

[0012] Preferably, a vent hole is fixedly provided at the top of the second sleeve.

[0013] Preferably, a sealing ring is provided on the inner end of the vertical pipe, the inner edge of the sealing ring is in contact with the pressure relief pipe, the outer edge of the sealing ring is in contact with the inner wall of the vertical channel, and a connecting ring two is fixedly provided on the top of the sealing ring, and the bottom of the connecting ring two is fixedly connected to the vertical pipe and the conical head.

[0014] Preferably, the front end of the guide tube is provided with a plug-in block, the plug-in block is detachably connected to the guide tube, the upper and lower sides of the end of the plug-in block are sloping structures, the mold is provided with a card hole for the plug-in block to be inserted, and the end of the guide channel is located in the plug-in block.

[0015] Preferably, the injection molding machine includes the anti-clogging structure for the injection molding machine.

[0016] The beneficial effects of this invention are as follows: When blockage occurs at the end of the injection molding machine, the end cap is lifted upwards, connecting the vertical channel with the axial channel. This relieves pressure inside the cylinder, preventing blockage and avoiding oil leakage or cylinder explosion. As the end cap moves upwards, it pulls the sealing tube through the connecting ring and transmission mechanism, opening the guide channel. This ensures that the extruded molten plastic can re-enter the cylinder from the end of the guide channel, achieving internal filling and ensuring continued operation of the equipment. Simultaneously, to alleviate pressure, a locking block supports the bottom of the connecting ring, preventing further upward lifting of the end cap during subsequent cylinder compression. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of the end cap of the present invention when it is not lifted.

[0019] Figure 2 This is a cross-sectional view of the end cap of the present invention after it has been lifted.

[0020] Figure 3 for Figure 1 A magnified view of part A.

[0021] Figure 4 for Figure 2 A magnified view of section B.

[0022] Figure 5 for Figure 2 A magnified view of a portion of point C.

[0023] Figure 6 This is the front view of the transmission mechanism in its connected state.

[0024] Figure 7 This is a three-dimensional structural diagram of the locking mechanism.

[0025] Figure 8 This is a partial three-dimensional structural diagram of the present invention.

[0026] Explanation of reference numerals in the attached drawings: 1. Mold; 2. Barrel; 2a. Conical head; 2a1. Shaft channel; 2b. Vertical tube; 2b1. Horizontal channel; 2b2. Vertical channel; 2b3. Sealing ring step; 3. Pressure relief pipe; 3a. End cap; 3b. Connecting ring one; 3c. Feed hole; 3d. Circular step; 4. Elastic clamp; 4a. Disc spring; 5. Guide tube; 5a. Sleeve one; 5b. Guide channel; 5c. Sleeve two; 5e. Blocking ring; 5f. Insert block; 6. Sealing tube; 7. Transmission mechanism; 7a. Hinge rod; 7b. Rotary seat; 7c. Upper sliding column; 7d. Lower sliding column; 8. Locking mechanism; 8a. Locking block; 8b. Guide column; 8c. Spring; 8d. Guide seat; 9. Sealing ring; 9a. Connecting ring two. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example: This invention provides an anti-clogging structure for an injection molding machine and the injection molding machine thereof, such as... Figure 1-8 As shown, the device includes a vertical pipe 2b and a pressure relief pipe 3 inserted into the middle of the vertical pipe 2b. The vertical pipe 2b is fixedly installed inside the conical head 2a, and the middle part of the vertical pipe 2b is connected to the central channel 2a1 of the conical head 2a through a horizontal channel 2b1. The vertical pipe 2b has a vertical channel 2b2 arranged vertically, which is connected to the horizontal channel 2b1. A sealing ring step 2b3 is provided at the junction of the vertical channel 2b2 and the horizontal channel 2b1. The sealing ring step 2b3 is located inside the vertical channel 2b2. The end of the pressure relief pipe 3 is inserted into the horizontal channel 2b1, and a cap 3a is provided at the end of the pressure relief pipe 3. An elastic clamp 4 is fixedly provided at the top of the pressure relief pipe 3. The elastic clamp 4 is used to press the pressure relief pipe 3 into the sealing ring step 2b3. When the hydraulic cylinder extrudes, the molten plastic will be extruded along the central channel 2a1 and transported into the cavity of the mold 1. If the end of the shaft channel 2a1 becomes blocked, the pressure inside the shaft channel 2a1 will increase, and the molten plastic will push the end cap 3a upward, causing the end cap 3a to separate from the sealing ring step 2b3. The molten plastic can then be squeezed out along the vertical channel 2b2, releasing the pressure inside the shaft channel 2a1 and preventing oil leakage or cylinder explosion. The blockage of the conical head 2a is not a one-time event, but rather an accumulation of small blockages over a long period during multiple injection molding processes. Due to the elastic downward pressure of the elastic clamp 4, when a small blockage occurs, the end cap 3a is pushed upward, creating pressure relief. The elastic force of the elastic clamp 4 can be changed in various ways, including by changing the model of the disc spring.

[0029] The above methods can release pressure regardless of any blockage that occurs.

[0030] After each pressure release, the elastic clamp 4 can push the end cap 3a back into the sealing ring step 2b3 to seal the sealing ring step 2b3. Therefore, smaller blockages may be squeezed out under increased pressure, but the sealing can ensure that the operation can continue.

[0031] It should be explained that the number of pressure relief pipes 3 is not limited to one; the number of pressure relief pipes 3 and vertical channels 2b2 can be changed according to the need for pressure relief.

[0032] In case of blockage, maintenance personnel may not be able to perform repairs in a timely manner. To avoid affecting production efficiency, a guide pipe 5 and a sealing pipe 6 are included. One end of the guide pipe 5 is connected to the interior of the mold 1. A sleeve 5a is provided at the bottom of the guide pipe 5. The top of the pressure relief pipe 3 is inserted into the sleeve 5a. The pressure relief pipe 3 has a feed hole 3c that communicates with its interior. A guide channel 5b is provided in the middle of the guide pipe 5, and the sleeve 5a is connected to the guide channel 5b. The sealing tube 6 can be horizontally slidably inserted into the flow channel 5b. The diameter of the flow channel 5b is larger than the diameter of the sealing tube 6. The end of the flow channel 5b is tapered. The end of the sealing tube 6 is provided with a tapered head that fits against the end of the flow channel 5b. A connecting ring 3b is fixedly provided on the outer edge of the pressure relief tube 3. The connecting ring 3b is connected to one end of the sealing tube 6 through a transmission mechanism 7. The transmission mechanism 7 is used to convert the vertical upward force of the pressure relief tube 3 into the horizontal force of the sealing tube 6. When the end cap 3a is pushed open upward, the connecting ring 3b will move upward simultaneously. The connecting ring 3b will pull the sealing tube 6 away from the mold 1 through the transmission mechanism 7, so that the end of the flow channel 5b is opened. This opening method ensures that when the vertical channel 2b2 is opened, the end of the flow channel 5b is opened quickly. Because the flow speed of the melt is fast under high pressure, this synchronous transmission opening must be used to meet the opening speed requirements.

[0033] After the channel is opened, the molten liquid flowing along the central channel 2a1 will enter the feed hole 3c along the vertical channel 2b2, and finally enter the guide channel 5b through the middle pipe of the pressure relief pipe 3. Finally, it will be squeezed into the mold cavity 1 along the end of the guide channel 5b. This ensures that even in the event of a blockage, the squeezed molten liquid can still be injected into the mold cavity 1, allowing the equipment to continue operating and avoiding downtime due to blockages. This greatly facilitates maintenance and improves production efficiency. During peak seasons, there are many orders and more equipment maintenance issues, so the equipment cannot be shut down for extended periods.

[0034] From Figure 1 and Figure 3 The image shows the state of the flow channel 5b when it is not open.

[0035] From Figure 2 and Figure 4 The state of the flow channel 5b when it is open can be seen in the image.

[0036] The transmission mechanism 7 includes a hinge rod 7a and a rotating base 7b. The upper sliding column 7c is fixedly connected to the sealing tube 6, and the lower sliding column 7d is fixedly connected to the connecting ring 3b. The rotating base 7b is fixedly installed on the material cylinder 2. The middle part of the hinge rod 7a is hinged to the rotating base 7b. Both ends of the hinge rod 7a have waist-shaped holes for the upper sliding column 7c and the lower sliding column 7d to slide. When the connecting ring 3b moves upward, the connecting ring 3b will push the hinge rod 7a to rotate through the lower sliding column 7d, causing the hinge rod 7a to pull the sealing tube 6 away from the mold 1, thereby opening the end of the guide channel 5b.

[0037] The elastic clamping device 4 includes multiple disc springs 4a. A circular step 3d is provided at the top of the connecting ring 3b, and the disc springs 4a are sleeved on the outer edge of the circular step 3d. A second sleeve 5c is fixedly provided at the bottom of the first sleeve 5a, and the circular step 3d is inserted into the second sleeve 5c. A blocking ring 5e is fixedly provided on the bottom outer edge of the second sleeve 5c. The topmost disc spring 4a abuts against the blocking ring 5e, and the bottommost disc spring 4a abuts against the top of the connecting ring 3b. When the pressure relief pipe 3 moves upward, it will cause the connecting ring 3b to compress the disc springs 4a, while the circular step 3d is guided by the first sleeve 5a. The circular step 3d is designed to increase the strength of the pressure relief pipe 3 and prevent it from bending due to the resistance of the disc springs 4a.

[0038] It also includes a locking mechanism 8, which is fixedly installed on the mold 1 to support the bottom of the lifting connecting ring 3b. By supporting the bottom of the connecting ring 3b, the channel between the vertical channel 2b2 and the axial channel 2a1 is kept open. During subsequent extrusion, the plastic can be directly extruded along the end of the guide tube 5, relieving the pressure of the hydraulic cylinder and allowing maintenance personnel to repair the equipment without being in a hurry.

[0039] The locking mechanism 8 includes a locking block 8a, a guide post 8b, a spring 8c, and a guide seat 8d. The guide seat 8d is fixedly mounted on the mold 1. The guide post 8b is horizontally slidable on the guide seat 8d. The locking block 8a is fixedly mounted on the guide post 8b. The spring 8c provides elastic force to the locking block 8a towards the connecting ring 3b. The spring 8c is sleeved on the guide post 8b, with one end abutting against the guide seat 8d and the other end abutting against the locking block 8a. A limit plate is fixedly provided on the other end of the guide post 8b to prevent the guide post 8b from completely popping out of the guide seat 8d. When the connecting ring 3b is lifted upwards, the locking block 8a quickly inserts into the bottom of the connecting ring 3b, preventing the lifted connecting ring 3b from returning downwards. The end of the locking block 8a that contacts the connecting ring 3b has a stepped structure. This stepped structure ensures that the locking block 8a can support the connecting ring 3b regardless of its height.

[0040] like Figure 3 As shown, a vent hole is fixedly opened at the top of the second sleeve 5c. By setting the vent hole, the gas inside the second sleeve 5c can be discharged outward when the circular step 3d is squeezed upward.

[0041] A sealing ring 9 is provided on the inner edge of the vertical pipe 2b. The inner edge of the sealing ring 9 is in contact with the pressure relief pipe 3, and the outer edge of the sealing ring 9 is in contact with the inner wall of the vertical channel 2b2. The sealing ring 9 plays a sealing role. A connecting ring 2a is fixedly provided on the top of the sealing ring 9. The bottom of the connecting ring 2a is fixedly connected to the vertical pipe 2b and the conical head 2a. The connecting ring 2a connects the vertical pipe 2b and the conical head 2a.

[0042] like Figure 5 As shown, the front end of the guide tube 5 is provided with a plug block 5f, which is detachably connected to the guide tube 5. The upper and lower sides of the end of the plug block 5f have a sloping structure. The mold 1 has a locking hole for the plug block 5f to be inserted. The end of the guide channel 5b is located inside the plug block 5f. Because the plug block 5f is a detachable structure, the inside of its guide channel 5b can be easily cleaned during subsequent maintenance. The sloping structure of the plug block 5f also facilitates positioning during installation.

[0043] An injection molding machine, the injection molding machine including the anti-clogging structure of the injection molding machine.

[0044] In operation, when the hydraulic cylinder compresses, the molten plastic is extruded along the central channel 2a1 and transported into the cavity of the mold 1. If the end of the central channel 2a1 becomes blocked, the pressure inside the central channel 2a1 will increase, and the molten plastic will push the end cap 3a upward, causing the end cap 3a to separate from the sealing ring step 2b3. Simultaneously, through the transmission mechanism 7, the sealing tube 6 is pulled backward. As the connecting ring 3b moves upward, the locking block 8a will insert into the bottom of the connecting ring 3b, ensuring that the channel remains open.

[0045] This anti-clogging structure and the injection molding machine itself enable the end cap 3a to be lifted upwards when blockage occurs at the end of the barrel. This connects the vertical channel 2b2 with the axial channel 2a1, relieving pressure inside the barrel and preventing blockage, thus avoiding oil leakage or cylinder explosion. As the end cap 3a moves upwards, it pulls the sealing tube 6 via the connecting ring 3b and the transmission mechanism 7, opening the guide channel 5b. This ensures that the extruded molten plastic can re-enter the barrel 2 from the end of the guide channel 5b, achieving internal filling of the barrel 2 and ensuring continued operation of the equipment. Simultaneously, to alleviate pressure, the bottom of the connecting ring 3b is supported by the locking block 8a, ensuring that subsequent cylinder compression does not require further force to lift the end cap 3a upwards.

[0046] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A clog prevention structure for an injection molding machine, characterized in that, The device includes a vertical pipe (2b) and a pressure relief pipe (3) inserted into the middle of the vertical pipe (2b). The vertical pipe (2b) is fixedly installed inside the conical head (2a), and the middle part of the vertical pipe (2b) is connected to the central channel (2a1) of the conical head (2a) through a horizontal channel (2b1). The vertical pipe (2b) has a vertical channel (2b2) ​​in a vertical direction, which is connected to the horizontal channel (2b1). The vertical channel (2b2) ​​is connected to the horizontal channel (2b1). A sealing ring step (2b3) is provided at the junction of the horizontal channel (2b1). The sealing ring step (2b3) is located inside the vertical channel (2b2). The end of the pressure relief pipe (3) is inserted into the horizontal channel (2b1). The end of the pressure relief pipe (3) is provided with a cap (3a). An elastic clamp (4) is fixedly provided on the top of the pressure relief pipe (3). The elastic clamp (4) is used to press the pressure relief pipe (3) into the sealing ring step (2b3). It also includes a guide pipe (5) and a sealing pipe (6). One end of the guide pipe (5) is connected to the interior of the cavity of the mold (1). A sleeve (5a) is provided at the bottom of the guide pipe (5). The top of the pressure relief pipe (3) is inserted into the sleeve (5a). A feed hole (3c) communicating with the interior of the pressure relief pipe (3) is provided on the pressure relief pipe (3). A guide channel (5b) is provided in the middle of the guide pipe (5). The sleeve (5a) is connected to the guide channel (5b). The sealing pipe (6) can be horizontally slidably inserted into the guide channel (5a). b) Inside, the diameter of the flow channel (5b) is larger than the diameter of the sealing pipe (6). The end of the flow channel (5b) is a tapered structure. The end of the sealing pipe (6) is provided with a tapered head that fits with the end of the flow channel (5b). A connecting ring (3b) is fixedly provided on the outer edge of the pressure relief pipe (3). The connecting ring (3b) is connected to one end of the sealing pipe (6) through a transmission mechanism (7). The transmission mechanism (7) is used to convert the vertical upward power of the pressure relief pipe (3) into the horizontal power of the sealing pipe (6). It also includes a locking mechanism (8), which is fixedly installed on the mold (1) and is used to support the bottom of the raised connecting ring (3b).

2. The anti-clogging structure for an injection molding machine as described in claim 1, characterized in that, The transmission mechanism (7) includes a hinge rod (7a) and a rotating seat (7b). The upper sliding column (7c) is fixedly connected to the sealing tube (6), and the lower sliding column (7d) is fixedly connected to the connecting ring (3b). The rotating seat (7b) is fixedly installed on the material cylinder (2). The middle part of the hinge rod (7a) is hinged to the rotating seat (7b). The two ends of the hinge rod (7a) are provided with waist-shaped holes for the upper sliding column (7c) and the lower sliding column (7d) to slide.

3. The anti-clogging structure for an injection molding machine as described in claim 1, characterized in that, The elastic clamp (4) includes multiple disc springs (4a), a circular step (3d) is provided on the top of the connecting ring (3b), multiple disc springs (4a) are sleeved on the outer edge of the circular step (3d), a sleeve (5c) is fixedly provided at the bottom of the sleeve (5a), the circular step (3d) is inserted into the sleeve (5c), a blocking ring (5e) is fixedly provided on the bottom outer edge of the sleeve (5c), the topmost disc spring (4a) abuts against the blocking ring (5e), ​​and the bottommost disc spring (4a) abuts against the top of the connecting ring (3b).

4. The anti-clogging structure for an injection molding machine as described in claim 3, characterized in that, The locking mechanism (8) includes a locking block (8a), a guide post (8b), a spring (8c), and a guide seat (8d). The guide seat (8d) is fixedly installed on the mold (1). The guide post (8b) is horizontally slidably installed on the guide seat (8d). The locking block (8a) is fixedly installed on the guide post (8b). The spring (8c) provides elastic force to the locking block (8a) towards the connecting ring (3b). The end of the locking block (8a) that is in contact with the connecting ring (3b) has a stepped structure.

5. The anti-clogging structure for an injection molding machine as described in claim 3, characterized in that, A vent hole is fixedly opened at the top of the second sleeve (5c).

6. The anti-clogging structure for an injection molding machine as described in claim 1, characterized in that, A sealing ring (9) is provided on the inner edge of the vertical pipe (2b). The inner edge of the sealing ring (9) is in contact with the pressure relief pipe (3), and the outer edge of the sealing ring (9) is in contact with the inner wall of the vertical channel (2b2). A connecting ring two (9a) is fixedly provided on the top of the sealing ring (9), and the bottom of the connecting ring two (9a) is fixedly connected to the vertical pipe (2b) and the conical head (2a).

7. The anti-clogging structure for an injection molding machine as described in claim 1, characterized in that, The front end of the guide tube (5) is provided with a plug-in block (5f). The plug-in block (5f) is detachably connected to the guide tube (5). The upper and lower sides of the end of the plug-in block (5f) are sloped structures. The mold (1) is provided with a card hole for the plug-in block (5f) to be inserted. The end of the guide channel (5b) is located inside the plug-in block (5f).

8. An injection molding machine, characterized in that, The injection molding machine includes the anti-clogging structure of the injection molding machine as described in any one of claims 1-7.

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