Anti-blocking structure of injection molding machine and injection molding machine thereof

Abstract

The invention relates to the technical field of injection molding machines, in particular to an injection molding machine anti-blocking structure and an injection molding machine thereof.The injection molding machine anti-blocking structure comprises a vertical pipe and a pressure relief pipe inserted into the middle of the vertical pipe, and the vertical pipe is fixedly installed in a conical head. The vertical channel is communicated with the axis channel, pressure relief and blockage prevention are carried out on the interior of the charging barrel, and the situation of oil leakage or cylinder explosion of the oil cylinder is avoided. When the end socket moves upwards, the plugging pipe is pulled to move through the first connecting ring and the transmission mechanism, so that the flow guide channel is opened, it is guaranteed that extruded plastic melt can enter the charging barrel again from the end of the flow guide channel, internal filling of the charging barrel is achieved, and it is guaranteed that equipment can continue to operate. And meanwhile, in order to relieve pressure, the bottom of the first connecting ring is supported through a clamping block, and it is guaranteed that the end socket does not need to be jacked upwards by applying force when a subsequent oil cylinder conducts extrusion.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding machines, and in particular to an anti-blocking structure of an injection molding machine and an injection molding machine thereof. Background Art

[0002] Injection molding machines melt and convey plastic pellets through a screw and barrel. However, after the molten plastic reaches the end of the barrel, a cylinder is needed to push the screw. However, the barrel's tapered end is prone to clogging. This can lead to excessive barrel pressure, making it difficult for the cylinder to push, ultimately causing the cylinder to explode or leak. Clogging can also occur due to incomplete melting of the plastic pellets or impurities within them, a rare but unavoidable occurrence.

[0003] In the existing technology, when faced with such a blockage, the machine is usually shut down for repair by follow-up personnel. If the end of the barrel is blocked, repair only requires removing and replacing the cone head at the end of the barrel. However, if the cylinder explodes or leaks oil, the entire repair process will take a long time because it involves replenishing hydraulic oil, regulating the pressure at the oil station, and even replacing the cylinder.

[0004] Therefore, it is necessary to design an anti-blocking structure for an injection molding machine and an injection molding machine thereof, which can relieve pressure inside the barrel and prevent blockage when blockage occurs at the end of the barrel, thereby avoiding oil leakage or explosion of the cylinder. Summary of the Invention

[0005] In view of the above-mentioned technical deficiencies, the purpose of the present invention is to provide an anti-blocking structure for an injection molding machine and an 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 explosion of the cylinder.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: the present invention provides an anti-blocking structure of an injection molding machine and an injection molding machine thereof, comprising a vertical pipe and a pressure relief pipe inserted into the middle of the vertical pipe, the vertical pipe is fixedly installed in the conical head, and the middle part of the vertical pipe is connected with the axial channel of the conical head through a horizontal channel, the vertical pipe is vertically provided with a vertical channel, the vertical channel is connected with the horizontal channel, a sealing ring step is provided at the intersection of the vertical channel and the horizontal channel, the sealing ring step is located on the inner side of the vertical channel, the end of the pressure relief pipe is inserted in the horizontal channel, the end of the pressure relief pipe is provided with a head, and an elastic compressor is fixedly provided on the top of the pressure relief pipe, and the elastic compressor 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 cavity of the mold, a sleeve is provided at the bottom of the guide tube, the top of the pressure relief tube is inserted in the sleeve, a feed hole connected to the interior of the pressure relief tube is opened, 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 inserted in the guide channel for horizontal sliding, the diameter of the guide channel is larger than the diameter of the sealing tube, the end of the guide channel is a conical structure, the end of the sealing tube is provided with a conical 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, and the transmission mechanism is used to convert the vertical upward power of the pressure relief tube into the horizontal power of the sealing tube.

[0008] Preferably, the transmission mechanism includes an articulated rod and a swivel seat, the upper sliding column is fixedly connected to the sealing tube, the lower sliding column is fixedly connected to the connecting ring, the swivel seat is fixedly installed on the barrel, the middle part of the articulated rod is hinged to the swivel seat, and waist-shaped holes are provided at both ends of the articulated rod for the upper sliding column and the lower sliding column to slide.

[0009] Preferably, the elastic compressor includes multiple disc springs, a circular step is provided on the top of the connecting ring one, and 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 conflicts with the blocking ring, and the bottommost disc spring conflicts with the top of the connecting ring one.

[0010] Preferably, a locking mechanism is further included, which is fixedly mounted on the mold and is used to support the bottom of the raised connecting ring.

[0011] Preferably, the locking mechanism includes a card block, a guide post, a spring and a guide seat. The guide seat is fixedly installed on the mold, the guide post can be installed on the guide seat for horizontal sliding, the card block is fixedly installed on the guide post, and the spring is used to provide an elastic force to the card block toward the connecting ring one. The end of one side of the card block that fits with the connecting ring one is a step structure.

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

[0013] Preferably, a sealing ring is provided on the inner edge end of the vertical pipe, the inner edge of the sealing ring is fitted with the pressure relief pipe, the outer edge of the sealing ring is fitted with the inner wall of the vertical channel, and a connecting ring 2 is fixedly provided on the top of the sealing ring, and the bottom of the connecting ring 2 is fixedly connected to the vertical pipe and the conical head.

[0014] Preferably, a plug-in block is provided at the front end of the guide tube, and 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 slope structures, and a card hole for the plug-in block to be embedded is opened on the mold, and the end of the guide channel is set in the plug-in block.

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

[0016] The beneficial effects of the present invention are as follows: the anti-blocking structure of the injection molding machine and the injection molding machine thereof can, when a blockage occurs at the end of the barrel, lift the head upward, so that the vertical channel is connected to the axial channel, relieve pressure inside the barrel to prevent blockage, and avoid oil leakage or explosion of the cylinder. When the head moves upward, the sealing tube is pulled by the connecting ring 1 and the transmission mechanism to move, so that the diversion channel is opened, ensuring that the extruded plastic melt can re-enter the barrel from the end of the diversion channel, realize internal perfusion of the barrel, and ensure that the equipment can continue to operate. At the same time, in order to relieve pressure, the bottom of the connecting ring 1 is supported by a block to ensure that no force is applied to lift the head upward when the subsequent cylinder is squeezed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

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

[0019] Figure 2 It is a cross-sectional view of the head of the present invention after being jacked up.

[0020] Figure 3 for Figure 1 A partial enlarged view of point A.

[0021] Figure 4 for Figure 2 A partial enlarged view of point B.

[0022] Figure 5 for Figure 2 A partial enlarged view of point C.

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

[0024] Figure 7 It is a schematic diagram of the three-dimensional structure of the locking mechanism.

[0025] Figure 8 It is a schematic diagram of the local three-dimensional structure of the present invention.

[0026] Explanation of the accompanying drawings: 1. mold; 2. barrel; 2a. conical head; 2a1. axial channel; 2b. vertical pipe; 2b1. horizontal channel; 2b2. vertical channel; 2b3. sealing ring step; 3. pressure relief pipe; 3a. head; 3b. connecting ring 1; 3c. feed hole; 3d. circular step; 4. elastic clamp; 4a. disc spring; 5. guide pipe; 5a. sleeve 1; 5b. guide channel; 5c. sleeve 2; 5e. blocking ring; 5f. plug-in block; 6. sealing pipe; 7. transmission mechanism; 7a. hinged rod; 7b. swivel seat; 7c. upper sliding column; 7d. lower sliding column; 8. locking mechanism; 8a. block; 8b. guide column; 8c. spring; 8d. guide seat; 9. sealing ring; 9a. connecting ring 2. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Embodiment: The present invention provides an anti-blocking structure for an injection molding machine and an injection molding machine thereof, such as Figure 1-8 As shown, the vertical tube 2b includes a vertical tube 2b and a pressure relief tube 3 inserted into the middle of the vertical tube 2b. The vertical tube 2b is fixedly installed in the conical head 2a, and the middle of the vertical tube 2b is connected to the axial channel 2a1 of the conical head 2a through the horizontal channel 2b1. The vertical tube 2b is vertically provided with a vertical channel 2b2, which is connected to the horizontal channel 2b1. The intersection of the vertical channel 2b2 and the horizontal channel 2b1 is provided with a sealing ring step 2b3, which is located inside the vertical channel 2b2. The end of the pressure relief tube 3 is inserted into the horizontal channel 2b1, and the end of the pressure relief tube 3 is provided with a head 3a. The top of the pressure relief tube 3 is fixedly provided with an elastic clamp 4, which is used to clamp the pressure relief tube 3 against the sealing ring step 2b3. When the cylinder is extruded, the plastic melt will be squeezed along the axial channel 2a1 and transported into the cavity of the mold 1. If the end of the axial channel 2a1 becomes clogged, the pressure inside the axial channel 2a1 will increase, and the molten plastic will push the head 3a upward, separating the head 3a from the sealing ring step 2b3. The molten plastic can be squeezed out along the vertical channel 2b2, releasing the pressure inside the axial channel 2a1 and preventing oil leakage or explosion in the cylinder. When the conical head 2a becomes clogged, the process is not a one-time process, but rather the accumulation of small blockages over a long period of time during multiple injection molding. Due to the elastic downward pressure of the elastic compressor 4, when a small blockage occurs, the head 3a is pushed upward, causing pressure relief. There are many ways to change the elastic force of the elastic compressor 4, including changing the type of disc spring.

[0029] In this way, the pressure can be released regardless of any blockage that occurs.

[0030] After each pressure release is completed, the elastic compressor 4 can push the head 3a back to the sealing ring step 2b3 to seal the sealing ring step 2b3. Therefore, smaller blockages may be squeezed out when the pressure increases, and the sealing can ensure that the subsequent work can continue.

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

[0032] When a blockage occurs, maintenance personnel are not able to carry out repairs in time. In order to avoid affecting production efficiency, a guide pipe 5 and a blocking pipe 6 are also included. 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 connected to 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 tube 6 is inserted and slidably positioned horizontally within the flow channel 5b. The diameter of the flow channel 5b is larger than that of the sealing tube 6. The end of the flow channel 5b is tapered, and a conical head is provided at the end of the sealing tube 6 to mate with the end of the flow channel 5b. A connecting ring 1 3b is fixedly provided on the outer edge of the pressure relief tube 3. The connecting ring 1 3b is connected to one end of the sealing tube 6 via 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 sealing head 3a is pushed upward, the connecting ring 1 3b will simultaneously move upward, and the connecting ring 1 3b will pull the sealing tube 6 away from the mold 1 through the transmission mechanism 7, causing the end of the flow guide tube 5 to open. This opening method ensures that the end of the flow channel 5b is quickly opened when the vertical channel 2b2 is opened. Because the melt flows rapidly under high pressure, this synchronized transmission opening method is necessary to meet the required opening speed.

[0033] After the channel is opened, the melt flowing along the axial channel 2a1 will flow along the vertical channel 2b2 into the feed hole 3c, and finally enter the diversion channel 5b through the middle pipe of the pressure relief pipe 3, and finally squeeze into the cavity of the mold 1 along the end of the diversion channel 5b. This ensures that the extruded melt can still be injected into the cavity of the mold 1 in the event of a blockage, allowing the equipment to continue working and avoiding equipment downtime due to blockage, bringing greater convenience to maintenance and improving production efficiency. During the peak season, there are many orders and equipment maintenance issues, so the equipment cannot be shut down for a long time.

[0034] Can be obtained from Figure 1 and Figure 3 The state when the diversion channel 5b is not opened can be seen in FIG.

[0035] Can be obtained from Figure 2 and Figure 4 The state when the diversion channel 5b is opened can be seen in FIG.

[0036] The transmission mechanism 7 comprises a hinged rod 7a and a swivel base 7b. The upper slide 7c is fixedly connected to the sealing tube 6, and the lower slide 7d is fixedly connected to the connecting ring 1 3b. The swivel base 7b is fixedly mounted on the barrel 2. The middle of the hinged rod 7a is hinged to the swivel base 7b. Both ends of the hinged rod 7a have waist-shaped holes for the upper and lower slides 7c and 7d to slide. When the connecting ring 1 3b moves upward, the connecting ring 1 3b pushes the hinged rod 7a through the lower slide 7d, causing it to rotate. This causes the hinged rod 7a to pull the sealing tube 6 outward away from the mold 1, opening the end of the diversion channel 5b.

[0037] The elastic pressure device 4 includes multiple disc springs 4a. A circular step 3d is provided at the top of the connecting ring 1 3b. Multiple 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 sleeve 1 5a. 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 contacts the blocking ring 5e, while the bottommost disc spring 4a contacts the top of the connecting ring 1 3b. When the pressure relief tube 3 moves upward, it drives the connecting ring 1 3b to compress the disc springs 4a, while the circular step 3d is guided by the sleeve 1 5a. The structural design of the circular step 3d is primarily to increase the strength of the pressure relief tube 3 and prevent the pressure relief tube 3 from being bent by the resistance of the disc springs 4a.

[0038] 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. By supporting the bottom of the connecting ring 3b, the channel between the vertical channel 2b2 and the axial channel 2a1 is continuously open. During subsequent extrusion, the plastic can be directly squeezed out along the end of the guide tube 5, relieving the pressure of the oil cylinder, so that maintenance personnel do not need to be particularly impatient to repair the equipment.

[0039] The locking mechanism 8 comprises a clamping 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, and the guide post 8b is horizontally slidably mounted on the guide seat 8d. The clamping block 8a is fixedly mounted on the guide post 8b. The spring 8c is used to provide an elastic force for the clamping block 8a toward the connecting ring 3b. The spring 8c is mounted on the guide post 8b, with one end of the spring 8c contacting the guide seat 8d and the other end contacting the clamping block 8a. A limiting circular plate is fixed to the other end of the guide post 8b to prevent the guide post 8b from completely ejecting from the guide seat 8d. When the connecting ring 3b is lifted upward, the clamping block 8a quickly inserts into the bottom of the connecting ring 3b, preventing the lifted connecting ring 3b from returning downward. The end of the clamping block 8a that contacts the connecting ring 3b has a stepped structure. This stepped structure ensures that the clamping block 8a can support the connecting ring 3b regardless of the height to which the connecting ring 3b is lifted.

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

[0041] A sealing ring 9 is provided on the inner edge end 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, and 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 action of the connecting ring 2a enables the vertical pipe 2b and the conical head 2a to be fixedly connected.

[0042] like Figure 5 As shown, the front end of the flow guide tube 5 is provided with a plug-in block 5f, which is detachably connected to the flow guide tube 5. The upper and lower ends of the plug-in block 5f are sloped structures. The mold 1 is provided with a latching hole for the plug-in block 5f to be inserted. The end of the flow guide channel 5b is located within the plug-in block 5f. The removable structure of the plug-in block 5f facilitates cleaning of the flow guide channel 5b during subsequent maintenance. The sloped structure of the plug-in block 5f also facilitates positioning during installation.

[0043] An injection molding machine comprises the injection molding machine anti-blocking structure.

[0044] During operation, when the hydraulic cylinder is extruding, molten plastic is extruded along axial channel 2a1 and transported into the cavity of mold 1. If the end of axial channel 2a1 becomes blocked, the pressure inside axial channel 2a1 increases, and the molten plastic pushes up the sealing head 3a, separating it from the sealing ring step 2b3. Simultaneously, the transmission mechanism 7 pulls the sealing tube 6 backward. As connecting ring 1 3b moves upward, the clamping block 8a inserts into the bottom of connecting ring 1 3b, ensuring the channel remains open.

[0045] The anti-blocking structure of the injection molding machine and the injection molding machine thereof can, when a blockage occurs at the end of the barrel, lift the head 3a upward, so that the vertical channel 2b2 is connected to the axial channel 2a1, and the pressure inside the barrel is relieved to prevent blockage, thereby avoiding oil leakage or explosion of the oil cylinder. When the head 3a moves upward, the sealing tube 6 is pulled to move by the connecting ring 1 3b and the transmission mechanism 7, so that the guide channel 5b is opened, ensuring that the extruded plastic melt can re-enter the barrel 2 from the end of the guide channel 5b, realize the internal perfusion of the barrel 2, and ensure that the equipment can continue to operate. At the same time, in order to relieve pressure, the bottom of the connecting ring 1 3b is supported by the block 8a, ensuring that no force is applied to lift the head 3a upward when the subsequent oil cylinder is squeezed.

[0046] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. An anti-blocking structure for an injection molding machine, characterized in that: The utility model comprises a vertical pipe (2b) and a pressure relief pipe (3) inserted into the middle of the vertical pipe (2b), wherein the vertical pipe (2b) is fixedly installed in the conical head (2a), and the middle of the vertical pipe (2b) is connected to the axial channel (2a1) of the conical head (2a) through the horizontal channel (2b1), and the vertical pipe (2b) is provided with a vertical channel (2b2) ​​in a vertical direction, and the vertical channel (2b2) ​​is connected to the horizontal channel (2b1), and the vertical channel (2b2) ​​is connected to the horizontal channel (2b1). A blocking ring step (2b3) is provided at the intersection of the horizontal channel (2b1), the blocking ring step (2b3) is located on the inner side of 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 head (3a), and an elastic tightener (4) is fixedly provided at the top of the pressure relief pipe (3), and the elastic tightener (4) is used to press the pressure relief pipe (3) into the blocking ring step (2b3).

2. The anti-blocking structure of an injection molding machine according to claim 1, characterized in that: The invention also includes a flow guide tube (5) and a blocking tube (6), one end of the flow guide tube (5) is connected to the interior of the cavity of the mold (1), a sleeve (5a) is provided at the bottom of the flow guide tube (5), the top of the pressure relief tube (3) is inserted into the sleeve (5a), a feed hole (3c) connected to the interior of the pressure relief tube (3) is provided, a flow guide channel (5b) is provided in the middle of the flow guide tube (5), the sleeve (5a) is connected to the flow guide channel (5b), and the blocking tube (6) is inserted into the flow guide channel (5b) in a horizontally sliding manner. b), the diameter of the guide channel (5b) is larger than the diameter of the blocking tube (6), the end of the guide channel (5b) is a conical structure, the end of the blocking tube (6) is provided with a conical head that fits with the end of the guide channel (5b), and 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 blocking tube (6) through a transmission mechanism (7). The transmission mechanism (7) is used to convert the vertical upward power of the pressure relief tube (3) into the horizontal power of the blocking tube (6).

3. The anti-blocking structure of an injection molding machine according to claim 2, characterized in that: The transmission mechanism (7) includes a hinged rod (7a) and a swivel seat (7b), an upper sliding column (7c) is fixedly connected to the sealing tube (6), a lower sliding column (7d) is fixedly connected to the connecting ring (3b), and the swivel seat (7b) is fixedly installed on the barrel (2). The middle part of the hinged rod (7a) is hinged to the swivel seat (7b), and waist-shaped holes for sliding the upper sliding column (7c) and the lower sliding column (7d) are opened at both ends of the hinged rod (7a).

4. The anti-blocking structure of an injection molding machine according to claim 2, characterized in that: The elastic pressing device (4) includes a plurality of disc springs (4a), a circular step (3d) is provided on the top of the connecting ring (3b), the plurality of disc springs (4a) are sleeved on the outer edge of the circular step (3d), a sleeve (5c) is fixedly provided on 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) contacts the blocking ring (5e), ​​and the bottommost disc spring (4a) contacts the top of the connecting ring (3b).

5. The anti-blocking structure of an injection molding machine according to claim 2, characterized in that: It also includes a locking mechanism (8), which is fixedly mounted on the mold (1) and is used to support the bottom of the raised connecting ring (3b).

6. The anti-blocking structure of an injection molding machine according to claim 5, characterized in that: The locking mechanism (8) includes a clamping block (8a), a guide post (8b), a spring (8c) and a guide seat (8d), wherein the guide seat (8d) is fixedly mounted on the mold (1), the guide post (8b) is horizontally slidably mounted on the guide seat (8d), the clamping block (8a) is fixedly mounted on the guide post (8b), the spring (8c) is used to provide an elastic force for the clamping block (8a) toward the connecting ring (3b), and the end portion of the clamping block (8a) that is in contact with the connecting ring (3b) is a step structure.

7. The anti-blocking structure of an injection molding machine according to claim 4, characterized in that: The top of the second sleeve (5c) is fixed with an air vent.

8. The anti-blocking structure of an injection molding machine according to claim 1, characterized in that: A blocking ring (9) is provided on the inner edge end of the vertical pipe (2b), the inner edge of the blocking ring (9) is in contact with the pressure relief pipe (3), the outer edge of the blocking ring (9) is in contact with the inner wall of the vertical channel (2b2), and a second connecting ring (9a) is fixedly provided on the top of the blocking ring (9), and the bottom of the second connecting ring (9a) is fixedly connected to the vertical pipe (2b) and the conical head (2a).

9. The anti-blocking structure of an injection molding machine according to claim 1, characterized in that: A plug-in block (5f) is provided at the front end of the guide tube (5), and 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 slope structures. A clamping hole for embedding the plug-in block (5f) is provided on the mold (1), and the end of the guide channel (5b) is arranged in the plug-in block (5f).

10. An injection molding machine, characterized in that: The injection molding machine includes the anti-blocking structure for the injection molding machine according to any one of claims 1 to 9.

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