Injection molding machine with anti-blocking function

Abstract

The invention relates to the technical field of anti-blocking of injection molding machines, in particular to an injection molding machine with an anti-blocking function, which comprises a mold unit and an injection unit, the injection unit comprises a nozzle, a feeding unit and a connecting channel; the mold unit comprises a movable mold and a fixed mold, the nozzle is arranged on the fixed mold, a mold cavity is formed when the fixed mold and the movable mold are closed, the nozzle is communicated with the mold cavity, and an included angle larger than or equal to 1 degree is formed between the extending direction of the nozzle and the horizontal plane; the feeding unit is horizontally arranged below the nozzle; the connecting channel is vertically arranged between the feeding unit and the nozzle, and the two ends of the connecting channel communicate with the feeding unit and the nozzle correspondingly. The nozzle structure is simplified, the outer diameter size is controlled to adapt to a complex mold, and the problems of high energy consumption and high cost caused by continuous heating are solved.

Description

Technical Field

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

[0002] After the injection molding machine completes the injection and the nozzle is removed, some of the molten material remains in the nozzle. Since the nozzle tip is open, the material remaining in the nozzle will drip.

[0003] Chinese Patent Publication No. CN111016074B discloses a unidirectional flow-limiting and anti-clogging nozzle for injection molding machines, comprising a nozzle body, a heating wire, a first drive spring, and a second drive spring. The nozzle body has a gating pipe, and a material delivery pipe is installed at the left end of the gating pipe. A spray nozzle is located outside the material delivery pipe, and a heating wire is located outside the spray nozzle. The material delivery pipe, spray nozzle, and heating wire are all located inside the nozzle body. The first drive spring is located outside the material delivery pipe and inside the spray nozzle. The material delivery pipe is connected to the spray nozzle via the first drive spring. A partition plate is fixedly installed at the left end of the material delivery pipe, and the edge of the partition plate is open. The nozzle body has a groove with a limiting rib on its inner side, which is fixedly installed on the inner wall of the nozzle body. The isolation plate is connected to the nozzle body through the groove and the limiting rib. An injection head is installed on the left end of the nozzle body, and a first one-way valve plate is installed on the injection head. A connecting shaft is provided on the first one-way valve plate, and the first one-way valve plate is connected to the injection head through the connecting shaft. A spiral spring is provided on the outer side of the connecting shaft, and the connecting shaft is connected to the first one-way valve plate through the spiral spring. A slot is provided on the right side of the injection head, and the slot is opened on the inner wall of the left end of the nozzle body. A conveying cylinder is provided on the right side of the slot, and the conveying cylinder is located inside the left end of the nozzle body.

[0004] The above solution allows the nozzle to close automatically, preventing material from dripping from the nozzle tip during mold parting. However, simply sealing the nozzle tip leaves material residue inside. This residue can solidify and clog the nozzle, requiring cleaning, increasing workload, wasting material, and severely impacting the injection molding machine's operation. Preventing material from solidifying in the nozzle necessitates heating and insulation, requiring the insulation components to extend around the nozzle, increasing cost and energy consumption. Furthermore, the insulation components surrounding the nozzle increase its outer diameter, making it unsuitable for complex molds. Summary of the Invention

[0005] To address the aforementioned issues, an injection molding machine with anti-clogging function is provided. By tilting the nozzle (with an angle ≥1° to the horizontal plane) and combining it with a vertical connecting channel and a horizontal feeding unit, the machine utilizes gravity to achieve automatic backflow of raw material in the nozzle after mold separation, significantly reducing the amount of raw material residue from the source. At the same time, it eliminates the need for insulation components around the nozzle, simplifying the nozzle structure, controlling the outer diameter to adapt to complex molds, and avoiding the high energy consumption and high cost problems caused by continuous heating.

[0006] To address the problems of existing technologies, this invention provides an injection molding machine with anti-clogging function, comprising a mold unit and an injection unit; The injection unit includes a nozzle, a feeding unit, and a connection channel; The mold unit includes a moving mold and a fixed mold. The nozzle is set on the fixed mold. When the fixed mold and the moving mold are closed, a mold cavity is formed. The nozzle is connected to the mold cavity. The extension direction of the nozzle has an angle of greater than or equal to 1° with the horizontal plane. The feeding unit is horizontally positioned below the nozzle; The connecting channel is vertically positioned between the feeding unit and the nozzle, with both ends of the connecting channel connected to the feeding unit and the nozzle, respectively.

[0007] Preferably, the injection unit further includes a push rod and a linear driver; The push rod is positioned on one side of the connection between the nozzle and the connecting channel, along the extension direction of the nozzle. The linear actuator is located at the end of the push rod. The linear actuator is used to drive the push rod to extend into the nozzle. The diameter of the push rod is the same as the inner diameter of the nozzle.

[0008] Preferably, the push rod is rotatably engaged with the end of the linear actuator, and a drive unit for driving the push rod to rotate is provided on the periphery of the push rod.

[0009] Preferably, the drive unit includes a gear ring and a first rotary driver; A toothed ring is fitted onto a push rod, and a groove is provided on the side wall of the push rod along the extension direction of the push rod. The toothed ring extends into the groove and slides into the groove. The first rotary actuator is located on one side of the gear ring and is used to drive the gear ring to rotate.

[0010] Preferably, a blocking block is vertically movable at the upper part of the connecting channel, and the lower end of the blocking block can extend into the connecting channel.

[0011] Preferably, a lifting pipe is provided around the periphery of the sealing block, the lower end of the lifting pipe is connected to the upper end of the connecting channel, and an air drive pipeline is provided on the upper part of the lifting pipe. The air drive pipeline is a three-way type, and an air pump and a switch valve are provided on one side of the air drive pipeline. The three ports of the air drive pipeline are respectively connected to the lifting pipe, the air pump and the switch valve.

[0012] Preferably, a protrusion is provided on the upper part of the sealing block, and a limiting groove is vertically opened in the lifting pipe, with the protrusion being movable in the limiting groove.

[0013] Preferably, the lower end face of the sealing block is a concave curved surface structure, and the diameter of the curved surface structure is the same as the diameter of the push rod.

[0014] Preferably, the feeding unit further includes a feeding channel and spiral blades; The feeding channel is horizontally positioned below the connecting channel, and the feeding channel is connected to the connecting channel. The feeding channel contains raw materials. The helical blades are horizontally rotating and positioned in the feeding channel.

[0015] Preferably, the blade spacing in the helical blades is gradually decreasing, with the blade spacing decreasing as it gets closer to the connecting channel.

[0016] The advantages of this invention compared to the prior art are: 1. This invention utilizes a structural design that tilts the nozzle and connects it with a vertical connecting channel and a horizontal feeding unit to achieve automatic backflow of raw material in the nozzle after mold separation using gravity. This significantly reduces the amount of raw material residue at the source and eliminates the need for insulation components around the nozzle. This simplifies the nozzle structure, controls the outer diameter to fit complex molds, and avoids the high energy consumption and high cost problems caused by continuous heating. It solves the drawbacks of poor adaptability and high energy consumption of traditional solutions.

[0017] 2. Through the coordinated operation of the push rod and the linear drive, and with the design that the push rod is the same as the inner diameter of the nozzle, the residual material in the nozzle is accurately pushed into the mold cavity after the material is fed, achieving zero residue inside the nozzle. This fundamentally eliminates the risk of blockage caused by the cooling and solidification of residual material. No manual disassembly and cleaning is required, reducing maintenance workload and material waste, and ensuring the continuous and stable operation of the injection molding machine. It is especially suitable for large-volume continuous production scenarios.

[0018] 3. Through the optimized design of the sealing block, air-driven pipeline, and gradually changing spiral blades, the system achieves intelligent opening and closing of the connection channel by leveraging the gravity of the sealing block and the linkage of air pressure, thus avoiding product defects and waste caused by incomplete injection of raw materials when the supply pressure is insufficient. On the other hand, the gradually changing blade spacing enables gradual pressurization during the raw material conveying process, improving plasticizing quality and preventing local carbonization and adhesion. At the same time, the self-rotation function of the push rod prevents raw material adhesion. The synergy of these multiple technologies further enhances the operational reliability of the equipment and the pass rate of injection molded products. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of an injection molding machine with anti-clogging function according to the present invention.

[0020] Figure 2This is a three-dimensional schematic diagram of an injection unit equipped with a heating wire in an injection molding machine with anti-clogging function according to the present invention.

[0021] Figure 3 This is a cross-sectional three-dimensional schematic diagram of the injection unit in an injection molding machine with anti-clogging function of the present invention when the raw material is injected.

[0022] Figure 4 This invention relates to an injection molding machine with anti-clogging function. Figure 3 A magnified view of a portion of point A in the middle.

[0023] Figure 5 This is a cross-sectional three-dimensional schematic diagram of the injection unit of an injection molding machine with anti-clogging function before the raw material is discharged.

[0024] Figure 6 This invention relates to an injection molding machine with anti-clogging function. Figure 5 A magnified view of a portion of point B in the middle.

[0025] Figure 7 This is a three-dimensional schematic diagram of the injection unit in an injection molding machine with anti-clogging function according to the present invention.

[0026] Figure 8 This is a partial cross-sectional three-dimensional schematic diagram of the injection unit in an injection molding machine with anti-clogging function according to the present invention.

[0027] The following are the labels in the diagram: 1. Mold unit; 2. Injection unit; 21. Nozzle; 22. Feeding unit; 221. Feeding pipe; 222. Spiral blade; 223. Second rotary actuator; 23. Connecting channel; 24. Push rod; 25. Linear actuator; 26. Drive unit; 261. Gear ring; 262. First rotary actuator; 263. Gear; 27. Sealing block; 271. Protrusion; 28. Lifting pipe; 281. Air drive pipe; 282. Limiting groove; 3. Heating wire. Detailed Implementation

[0028] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0029] Reference Figures 1-3 An injection molding machine with anti-clogging function includes a mold unit 1 and an injection unit 2; Injection unit 2 includes nozzle 21, feeding unit 22 and connecting channel 23; Mold unit 1 includes a moving mold and a fixed mold. Nozzle 21 is disposed on the fixed mold. When the fixed mold and the moving mold are closed, a mold cavity is formed. Nozzle 21 is connected to the mold cavity. The extension direction of nozzle 21 has an angle greater than or equal to 1° with the horizontal plane. The feeding unit 22 is horizontally positioned below the nozzle 21; The connecting channel 23 is vertically arranged between the feeding unit 22 and the nozzle 21, and the two ends of the connecting channel 23 are respectively connected to the feeding unit 22 and the nozzle 21.

[0030] By incorporating the self-closing design of the nozzle 21 in existing injection molding machines, physical sealing of the nozzle 21 end is effectively achieved during mold separation. This effectively solves the industry pain point of material dripping directly from the nozzle end, ensuring the appearance integrity of the injection molded product and the cleanliness of the production environment. This design, through a mechanical linkage, triggers the nozzle 21 closing mechanism at the moment of mold separation, forming a seal on the discharge port and preventing molten injection material from leaking out due to gravity. It has practicality in injection molding production under simple operating conditions.

[0031] However, no effective treatment mechanism was established for the flow channel inside nozzle 21, resulting in residual material that was not completely ejected during injection molding adhering to the inner wall of nozzle 21. During downtime or production interruptions, this residual injection material gradually loses its fluidity due to the decrease in ambient temperature, leading to a solidification reaction and forming hard lumps. As production cycles accumulate, the solidified material builds up, eventually causing the flow channel of nozzle 21 to narrow or even completely blockage, directly affecting the continuous operation of the injection molding machine.

[0032] When nozzle 21 becomes clogged, operators must stop the machine to disassemble and clean it. This process not only incurs additional manpower and time costs, significantly increasing the workload of daily maintenance, but also wastes the solidified material inside nozzle 21, reducing the utilization rate of injection molding materials and increasing production costs. More importantly, frequent shutdowns for cleaning disrupt the normal production rhythm, leading to decreased production efficiency. Especially in high-volume continuous production scenarios, this can trigger a chain reaction of problems such as order delivery delays, seriously affecting the company's production efficiency.

[0033] To prevent the raw material inside nozzle 21 from cooling and solidifying, some companies have adopted an improved solution of continuously heating and insulating nozzle 21. This is achieved by installing insulation components around nozzle 21 to maintain the temperature of the internal flow channel within nozzle 21 within the range required for the raw material to melt. However, this solution has significant limitations: firstly, the design, manufacturing, and installation of the insulation components require additional investment, and a high-precision temperature control system further increases equipment costs; secondly, the continuous heating process consumes a large amount of electricity, and long-term operation will lead to a significant increase in energy costs, which is inconsistent with the industry's trend towards energy conservation and environmental protection.

[0034] Meanwhile, the insulation components covering the nozzle 21 inevitably increase the overall outer diameter of the nozzle 21, causing its structural dimensions to exceed the original design range. When dealing with complex molds, due to the compact layout of the mold's inlet space and the narrow reserved channels, the enlarged nozzle 21 cannot smoothly adapt to the mold's installation requirements. This makes it difficult to apply this insulation solution to complex production scenarios such as precision injection molding and multi-cavity injection molding, limiting its applicability and promotional value.

[0035] To avoid the above situations, existing injection molding machines have been optimized to prevent material blockage and nozzle clogging during long periods of inactivity. The nozzle structure has also been simplified, improving its reliability. Furthermore, material dripping from the nozzle is less likely during mold parting. The specific structure and working process of this invention are as follows: During injection molding, the moving mold in mold unit 1 moves closer to the fixed mold and completes mold closing, forming a mold cavity. Since nozzle 21 is located on the fixed mold, it communicates with the cavity after it is formed. The feeding unit 22 feeds material to nozzle 21 through connecting channel 23. Once the material has completely entered the mold cavity, the feeding unit 22 stops feeding, and mold unit 1 begins cooling and molding. After cooling and molding are complete, the fixed mold and moving mold separate. Since the feeding unit 22 is stationary at this time, the material in connecting channel 23 slowly flows back into the feeding unit 22. Heating wire 3 is provided around the feeding unit 22 to heat and keep the material warm, ensuring its fluidity. Furthermore, because the nozzle is tilted upwards, the material in the nozzle will not drip during mold separation. Under gravity, the material gradually flows back into connecting channel 23, reducing the amount of material remaining in the nozzle and simplifying the nozzle 21 structure.

[0036] It is worth noting that the length of the connecting channel 23 should not be too long, otherwise the load on the feeding unit 22 will increase due to the height difference.

[0037] Reference Figure 5 , Figure 6 and Figure 8 Injection unit 2 also includes push rod 24 and linear driver 25; The push rod 24 is arranged on one side of the connection between the nozzle 21 and the connecting channel 23 along the extension direction of the nozzle 21; A linear actuator 25 is disposed at the end of the push rod 24. The linear actuator 25 is used to drive the push rod 24 to extend into the nozzle 21. The diameter of the push rod 24 is the same as the inner diameter of the nozzle 21.

[0038] By utilizing the inclined nozzle 21 and the gravity of the raw material, the material automatically flows back to the feeding unit 22 after mold separation. Although this reduces the amount of material residue in the nozzle 21, it cannot completely eliminate residue. Therefore, a push rod 24 and a linear actuator 25 are required to ensure that no material residue appears in the nozzle 21.

[0039] After the feeding unit 22 supplies the rated amount of raw material to the nozzle 21, the feeding unit 22 stops feeding. Then, the linear actuator 25 drives the push rod 24 to extend. The end of the push rod 24 moves from the connection between the nozzle 21 and the connecting channel 23 until it reaches the discharge end of the nozzle 21. The raw material remaining in the nozzle 21 is discharged from the discharge end of the nozzle 21 under the pushing action of the push rod 24. All the discharged raw material enters the mold cavity. When the push rod 24 fills the inside of the nozzle 21, the linear actuator 25 stops moving, and the mold unit 1 enters the cooling process, where the raw material in the mold cavity cools and solidifies. Since there is no raw material residue in the nozzle 21, there is no need to install a heating wire 3 outside the nozzle 21 to prevent the raw material inside the nozzle 21 from solidifying. This allows for a smaller end size of the nozzle 21, improving the adaptability of the nozzle 21 to special injection molded parts. After the raw material in the mold cavity cools and solidifies, the mold unit 1 separates the mold. The molded part after separation is located on the moving mold, and the linear actuator 25 drives the push rod 24 to withdraw from the nozzle 21.

[0040] During mass production, after the pusher rod 24 withdraws from the nozzle 21, the feeding unit 22 pre-feeds material to the nozzle 21, ensuring that some raw material is first discharged into the nozzle 21 through the connecting channel 23. Because the nozzle 21 has a certain tilt angle, the material entering the nozzle 21 will not drip, improving the efficiency of subsequent mold closing and injection. If there is no subsequent injection molding demand, the feeding unit 22 will not pre-feed material.

[0041] Reference Figure 7 The push rod 24 is rotatably engaged with the end of the linear actuator 25, and a drive unit 26 for driving the push rod to rotate is provided on the periphery of the push rod 24.

[0042] Before the mold unit 1 separates, the drive unit 26 drives the push rod 24 to rotate, so as to avoid tearing off some of the solidified material when the push rod 24 separates directly, causing the material to adhere to the end of the push rod 24. If the solidified material at the end of the push rod 24 falls and mixes into the molten material, it will also lead to poor injection molding quality in the future.

[0043] Reference Figure 6 and Figure 7 The drive unit 26 includes a gear ring 261 and a first rotary driver 262; The toothed ring 261 is sleeved on the push rod 24. A groove is provided on the side wall of the push rod 24 along the extension direction of the push rod 24. The toothed ring 261 extends into the groove and slides into the groove. The first rotary actuator 262 is disposed on one side of the gear ring 261 and is used to drive the gear ring 261 to rotate.

[0044] The drive unit 26 also includes a gear 263, which is fixedly mounted on the output end of the first rotary driver 262. The gear 263 meshes with the gear ring 261. The first rotary driver 262 is preferably a servo motor. The first rotary driver 262 drives the gear ring 261 to rotate through the gear 263, thereby causing the push rod 24 to rotate.

[0045] Reference Figure 4 and Figure 8 A blocking block 27 is vertically movable at the upper part of the connecting channel 23, and the lower end of the blocking block 27 can extend into the connecting channel 23.

[0046] When the feeding unit 22 is working normally, there is a certain pressure in the mold cavity formed by the moving mold and the fixed mold. Extrusion pressure is generated inside the feeding unit 22. When this extrusion pressure is greater than the pressure in the mold cavity, the raw material can push up the sealing block 27 extending into the connecting channel 23. After the sealing block 27 is pushed up, the connecting channel 23 is smoothly connected to the nozzle, and the raw material can be smoothly discharged through the nozzle. When the feeding unit 22 malfunctions, the extrusion pressure of the feeding unit 22 is low, and the raw material cannot push up the sealing block 27. At this time, the sealing block 27 can block the connecting channel 23, and the feeding unit 22 is disconnected from the nozzle. If the sealing block 27 is not provided, when the feeding unit 22 malfunctions, the extrusion pressure of the feeding unit 22 is low, and the raw material cannot be completely discharged into the mold cavity, resulting in a defective final molded part and wasting raw material. Providing the sealing block 27 avoids this waste.

[0047] Reference Figure 3 and Figure 4 A lifting pipe 28 is provided around the sealing block 27. The lower end of the lifting pipe 28 is connected to the upper end of the connecting channel 23. An air drive pipe 281 is provided on the upper part of the lifting pipe 28. The air drive pipe 281 is a three-way pipe. An air pump and a switch valve are provided on one side of the air drive pipe 281. The three ports of the air drive pipe 281 are respectively connected to the lifting pipe 28, the air pump and the switch valve.

[0048] When the feeding unit 22 is feeding material normally, the switch valve is in the open state, and the upper part of the lifting pipe 28 is connected to the outside. The sealing block 27 slides in the lifting pipe 28 by its own weight and the thrust of the raw material during extrusion. After the feeding unit 22 finishes feeding, the switch valve closes, the air pump starts, and the air pump extracts the air from the upper part of the lifting pipe 28. The sealing block 27 rises, and after rising, the sealing block 27 no longer blocks the push rod 24. The air pump stops running, and the linear actuator 25 drives the push rod 24 to extend. The push rod 24 pushes all the raw material remaining in the nozzle 21 into the mold cavity. After the mold cavity has cooled down, the linear actuator 25 drives the push rod 24 to retract, the switch valve reopens, and the sealing block 27 falls back into the connecting channel 23 under the action of gravity.

[0049] Reference Figure 4 A protrusion 271 is provided on the upper part of the sealing block 27, and a limiting groove 282 is vertically opened in the lifting pipe 28. The protrusion 271 is movably disposed in the limiting groove 282.

[0050] By setting the protrusion 271 and the limiting groove 282, the movement position of the sealing block 27 is limited.

[0051] Reference Figure 8 The lower end face of the sealing block 27 is a concave curved surface structure, and the diameter of the curved surface structure is the same as the diameter of the push rod 24.

[0052] Since the diameter of the push rod 24 is the same as the internal diameter of the nozzle, when the sealing block 27 is fully raised, the lower end of the sealing block 27 completely overlaps with the internal pipe of the nozzle 21. Therefore, the diameter of the curved structure is the same as the diameter of the push rod 24, avoiding material residue at the lower end of the sealing block 27.

[0053] Reference Figure 7 and Figure 8 The feeding unit 22 also includes a feeding channel and a spiral blade 222; The feeding channel is horizontally positioned below the connecting channel 23, and the feeding channel is connected to the connecting channel 23. Raw materials are stored in the feeding channel. The spiral blade 222 is horizontally rotated and installed in the feeding channel.

[0054] The feeding unit 22 also includes a second rotary driver 223, which is disposed at the end of the feeding channel and is used to drive the spiral blade 222 to rotate. The second rotary driver 223 is preferably a servo motor.

[0055] Reference Figures 1-8 The blade spacing in the spiral blade 222 is gradually decreasing, becoming smaller the closer it is to the connecting channel 23.

[0056] By making the blade spacing in the helical blades 222 gradually change, the helical blades 222 can gradually pressurize the raw materials during transport. The gradual design can avoid the local pressure concentration caused by traditional equidistant helical blades 222, prevent the material from carbonizing and sticking due to excessive compression, and improve the plasticizing quality of the melt.

[0057] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. An injection molding machine with anti-blocking function, comprising a mold unit (1) and an injection unit (2); characterized in that The injection unit (2) comprises a nozzle (21), a feeding unit (22) and a connecting channel (23); The mold unit (1) comprises a fixed mold and a movable mold, the nozzle (21) is arranged on the fixed mold, the fixed mold and the movable mold form a mold cavity when they are closed, the nozzle (21) is communicated with the mold cavity, and an angle between an extension direction of the nozzle (21) and a horizontal plane is greater than or equal to 1°; The feeding unit (22) is horizontally arranged below the nozzle (21); The connecting channel (23) is vertically arranged between the feeding unit (22) and the nozzle (21), and two ends of the connecting channel (23) are communicated with the feeding unit (22) and the nozzle (21) respectively.

2. The injection molding machine with anti-blocking function according to claim 1, characterized in that, The injection unit (2) further comprises a pushing rod (24) and a linear driver (25); The pushing rod (24) is arranged at one side of the nozzle (21) at a position where the nozzle (21) is connected with the connecting channel (23) along the extension direction of the nozzle (21); The linear driver (25) is arranged at an end of the pushing rod (24), the linear driver (25) is used for driving the pushing rod (24) to extend into the nozzle (21), and a diameter of the pushing rod (24) is the same as an inner diameter of the nozzle (21).

3. The injection molding machine with anti-blocking function according to claim 2, characterized in that, The pushing rod (24) is rotationally connected with the end of the linear driver (25), and a driving unit (26) for driving the pushing rod (24) to rotate is arranged on the periphery of the pushing rod (24).

4. The injection molding machine with anti-blocking function according to claim 3, characterized in that, The driving unit (26) comprises a gear ring (261) and a first rotary driver (262); The gear ring (261) is sleeved on the pushing rod (24), a groove is formed in the side wall of the pushing rod (24) along the extension direction of the pushing rod (24), the gear ring (261) extends into the groove and is in sliding connection with the groove; The first rotary driver (262) is arranged at one side of the gear ring (261) and is used for driving the gear ring (261) to rotate.

5. The injection molding machine with anti-blocking function according to claim 1, wherein, A blocking block (27) is vertically arranged at the upper part of the connecting channel (23), and the lower end of the blocking block (27) can extend into the connecting channel (23).

6. The injection molding machine with anti-blocking function according to claim 5, wherein, A lifting pipe (28) is arranged on the periphery of the blocking block (27), the lower end of the lifting pipe (28) is communicated with the upper end of the connecting channel (23), a gas driving pipeline (281) is arranged at the upper part of the lifting pipe (28), the gas driving pipeline (281) is a three-way type, a gas pump and an on-off valve are arranged at one side of the gas driving pipeline (281), and three ports of the gas driving pipeline (281) are communicated with the lifting pipe (28), the gas pump and the on-off valve respectively.

7. The injection molding machine with anti-blocking function according to claim 6, wherein, A protruding part (271) is arranged at the upper part of the blocking block (27), a limiting groove (282) is vertically formed in the lifting pipe (28), and the protruding part (271) is movably arranged in the limiting groove (282).

8. The injection molding machine with anti-blocking function according to claim 5, wherein, The lower end surface of the blocking block (27) is a concave curved surface structure, and the diameter of the curved surface structure is the same as the diameter of the pushing rod (24).

9. The injection molding machine with anti-blocking function according to claim 1, wherein, The feeding unit (22) further comprises a feeding channel and a spiral blade (222); The feeding channel is horizontally arranged below the connecting channel (23), the feeding channel is communicated with the connecting channel (23), and raw materials are stored in the feeding channel; The spiral blade (222) is horizontally arranged in the feeding channel.

10. The injection molding machine with anti-blocking function according to claim 9, wherein, The blade distance in the spiral blade (222) is tapered, and the closer to the connecting channel (23), the smaller the blade distance.

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