Gas discharge device for an injection molding machine

Abstract

The application relates to a gas discharging device of an injection molding machine, belonging to the technical field of injection molding machines, which comprises a machine base and a main control module; a treatment groove is arranged in the machine base; a gas flow channel is arranged through the side wall of the machine base and is located at one end of the machine base close to raw material ejection; a connecting cylinder is arranged outside the machine base and covers the mouth of the gas flow channel and keeps sealing; the connecting cylinder is provided with an air outlet, an exhaust assembly is connected with the air outlet, a pressure gauge is further arranged on the connecting cylinder, the pressure gauge is electrically connected with the main control module, and the pressure gauge is used for detecting a pressure index; the gas flow channel is arranged at the wall thickness of the machine base, the gas flow channel blockage condition can be conveniently checked, the gas flow channel can be maintained in a short time, the gas discharging problem is solved; the gas generated in the overturning process enters the connecting cylinder from the gas flow channel, the gas can be stored for a certain amount before being discharged, and energy can be saved.

Description

Technical Field

[0001] This invention belongs to the field of injection molding machine technology, and specifically relates to a gas emission device for an injection molding machine. Background Technology

[0002] Injection molding machine screws are typically divided into compression, melting, and homogenization sections, each serving the following functions: 1. Compression section: Responsible for compressing, pressurizing, and venting the plastic. The material is almost completely dissolved after passing through this section, but not uniformly mixed. 2. Melting section: Its main functions are mixing, melting, and conveying, as well as providing sufficient pressure to maintain a uniform melt temperature and a stable flow rate of molten plastic. 3. Homogenization section: Ensures complete melting of the plastic, resulting in a uniform distribution of plastic components and achieving the desired plasticizing effect.

[0003] During the feeding stage: The material in the feeding system may contain entrained gas or air originally present in the mold cavity. If these gases are not promptly expelled during molding, they may form pores in the product. Secondly, during the injection stage: If the resin is not sufficiently dried and contains moisture, it will evaporate into water vapor at the injection temperature. Simultaneously, if the injection temperature is high, the plastic may decompose, generating gases that, if not promptly expelled, can also form pores in the product, affecting the molding quality.

[0004] Some gases are harmful and need to be recovered and treated. In addition, gases and moisture can affect the molding quality of products, so gas recovery devices are needed. The most common type on the market is an ordinary injection molding machine with an external large exhaust device. This is not a closed space, and the gas recovery effect is costly and cannot completely remove the gases.

[0005] Publication No. CN116252444A discloses a venting injection molding machine, including a base and an extrusion structure on the base. The extrusion structure has a gas guiding structure arranged inside. The gas guiding structure includes a combined inner sleeve, a positioning groove, and a spiral inner groove. The inner wall of the combined inner sleeve is symmetrically provided with positioning grooves. The positioning grooves are provided with spiral inner grooves located inside the combined inner sleeve. A suction structure is installed inside the positioning grooves. The suction structure includes a fixed bushing, a top thread, a side thread, a thick filter membrane, and a perforation. The upper end of the fixed bushing is provided with a top thread, and the lower end of the fixed bushing is provided with a side thread.

[0006] This method requires high screw processing costs, reduces screw strength, and the limited venting space behind the injection unit necessitates lengthening the injection stage, increasing space costs. Furthermore, if the screw's central hole is blocked by material, maintenance is difficult, requiring screw removal and material cleaning. In short, existing gas recovery devices for injection molding machines are costly and cannot completely recover gas; the vents are easily blocked by raw materials during venting, making maintenance difficult. Summary of the Invention

[0007] To address the aforementioned problems in the prior art, this invention provides a gas emission device for injection molding machines, solving the problems of incomplete gas emission and difficult maintenance of injection molding machines.

[0008] The objective of this invention can be achieved through the following technical solutions: A gas emission device for an injection molding machine includes a base and a main control module. The base has a processing tank, and a gas flow channel extends through its side wall, located at the end of the base near the raw material outlet. A connecting cylinder is provided on the outer side of the base, covering and sealing the opening of the gas flow channel. The connecting cylinder has an air outlet, and an exhaust assembly is connected to the air outlet. A pressure gauge is also installed on the connecting cylinder, electrically connected to the main control module, and used to detect pressure readings.

[0009] Preferably, the gas flow channel includes a first flow channel and a second flow channel, the first flow channel is connected to the processing tank, the second flow channel is located on top of the first flow channel, and the first flow channel and the second flow channel are connected but staggered.

[0010] Preferably, the connecting cylinder is equipped with a temperature control module, and the processing tank is equipped with a temperature sensor; both the temperature control module and the temperature sensor are electrically connected to the main control module. By setting the temperature of the temperature control module to be higher than the temperature inside the processing tank, the gas in the processing tank is guided to flow to the gas channel.

[0011] Preferably, the temperature control module is installed between the connecting cylinder and the exhaust assembly; the temperature control module includes a first temperature control unit and a gas absorption tank; the first temperature control unit is sleeved on the exhaust port of the connecting cylinder, the gas absorption tank is detachably connected to the air outlet, and a gaseous reactant is placed in the gas absorption tank.

[0012] Preferably, the exhaust assembly includes an intake pipe, an air pump, and an exhaust pipe; the intake pipe is connected to the connecting cylinder, and both the intake pipe and the exhaust pipe are connected to the air pump.

[0013] Preferably, it further includes a feeding device, which is installed on the top of the machine base and communicates with the processing tank; the feeding device includes a hopper, a butterfly valve, and a glue injection head; the hopper is installed on the machine base, the hopper is conical, and the size of the hopper gradually increases from the connection point of the machine base upwards; the glue injection head is disposed inside the hopper; and the butterfly valve is disposed at the bottom of the hopper.

[0014] Preferably, it also includes a screw module, which is rotatably mounted on the processing tank; the screw module includes an extrusion cylinder, a spiral blade and a heating ring, the heating ring is installed inside the extrusion cylinder, a support shaft is also installed inside the extrusion cylinder, the spiral blade is installed on the outside of the support shaft, and a rotary sealing ring is provided at the end of the support shaft near the motor.

[0015] Preferably, the middle part of the compression section of the support shaft is provided with a concave-convex part, which is always located on one side of the gas flow channel. The pitch on the right side of the concave-convex part is greater than the pitch on the left side. The concave-convex part is used to block the raw material and gas.

[0016] Preferably, the top of the connecting cylinder is provided with an upper end cover, which is made of transparent PC fluororubber material.

[0017] Preferably, the base is provided with a glue injection panel module, which is electrically connected to the main control module; the glue injection panel module is equipped with a digital display pressure sensor; the connecting cylinder is also provided with a downdraft outlet, which is connected to the glue injection panel module through a pipe.

[0018] The beneficial effects of this invention are as follows: 1. The gas flow channel is located in the thick part of the machine base wall, which facilitates the troubleshooting of gas flow channel blockage. It can repair the gas flow channel in a short time and solve the gas emission problem. The working efficiency of the injection molding machine will not be affected by the gas emission. The gas generated during the flipping process enters the connecting cylinder from the gas flow channel. Since the gas is light, it can be stored in the connecting cylinder. It is convenient to store a certain amount of gas before releasing it, which can save energy.

[0019] Second, the longer exhaust distance prevents the material from rising under its own melt pressure. Since solids cannot overcome their own gravity, gravity and pressure cancel each other out in the gas flow channel, ensuring that only gas enters the second flow channel from the first flow channel. This effectively avoids material leakage and blockage in the gas flow channel, ensuring that gas can be smoothly discharged from the flow channel, further optimizing the risk of raw materials blocking the exhaust flow channel.

[0020] Third, a temperature control module is installed at the air outlet and connected to the main control module to ensure that the temperature at the air outlet is always higher than the temperature inside the treatment tank. Due to the continuous movement of gas molecules, they will diffuse from areas of high concentration to areas of low concentration, and then move from the treatment tank to the air outlet under the action of the screw module, thereby ensuring that the gas discharged from the tank is clean.

[0021] Fourth, a boss is made in the middle of the compression section of the screw; in addition, the pitch of the screw on the left and right sides of the boss is different; the smaller pitch means a longer transport distance and a longer preheating time; the larger pitch on the right side of the boss means that after the material is melted on the right side, the gas and water vapor will not run backward due to the structure of the boss, but will be discharged through the exhaust port. The gas will not carry the material backward, and the resulting resistance will cause the material to run backward. This can effectively solve the problems of gas emission and material running backward.

[0022] Both the air inlet pipe and the air outlet pipe are connected to the air pump. The other end of the air inlet pipe is connected to the connecting cylinder. The exhaust gas passes through the air pump and is then discharged through the exhaust pipe. This ensures that the air pump and the injection molding machine are in a relatively sealed space during the evacuation process, preventing new air from entering the injection molding machine. At the same time, it cleans up the gas generated in the treatment tank, so as not to affect the molding quality of the product. Attached Figure Description

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This invention provides a schematic diagram of the material cutting screw in the injection-to-bottom state in one embodiment; Figure 2 This is a schematic diagram of the screw extension / retraction connection structure provided in one embodiment of the present invention; Figure 3 This is a schematic diagram of the connecting cylinder assembly structure provided in one embodiment of the present invention; Figure 4 This is a schematic diagram of a tracheal connection structure provided in one embodiment of the present invention; Figure 5 This is a schematic diagram of a gas flow channel connection structure provided in one embodiment of the present invention; Figure 6 This is a schematic diagram of the main control module connection structure provided in one embodiment of the present invention; Legend: 1. Base; 11. Processing tank; 13. Temperature sensor; 2. Gas flow channel; 21. First flow channel; 22. Second flow channel; 3. Screw module; 32. Support shaft; 321. Concave and convex parts; 33. Spiral blade; 34. Heating ring; 41. Connecting cylinder; 411. Air outlet; 412. Downward air outlet; 42. Exhaust assembly; 421. Air inlet pipe; 422. Air pump; 423. Exhaust pipe; 51. First temperature control unit; 52. Gas absorption tank; 6. Feeding device; 61. Hopper; 62. Butterfly valve; 63. Injection head plate; 71. Digital display pressure sensor; 72. Pressure gauge; 8. Rotary sealing ring; 9. Top cover. Detailed Implementation

[0025] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0026] like Figures 1-6 As shown, a gas exhaust device for an injection molding machine includes a base 1 and a main control module. A processing tank 11 is provided inside the base 1, and a gas flow channel 2 is provided through the side wall of the base 1, located at the end of the base 1 near the material outlet. A connecting cylinder 41 is provided on the outer side of the base 1, and the connecting cylinder 41 is detachably connected to the base 1. The connecting cylinder 41 covers the opening of the gas flow channel 2 and maintains a seal. If exhaust is obstructed or impossible, the connecting cylinder 41 can be removed from the base 1 to observe whether the gas flow channel 2 is blocked by material. The gas emission problem is caused by raw material blockage. Therefore, simply clearing the gas flow channel 2 with a tool is sufficient. This structural design facilitates troubleshooting of gas flow channel 2 blockages and allows for quick repairs to resolve the gas emission issue, preventing it from affecting the injection molding machine's working efficiency. The connecting cylinder 41 is equipped with an air outlet 411, connected to which an exhaust assembly 42 is attached. A pressure gauge 72 is also installed in the connecting cylinder 41, electrically connected to the main control module. The pressure gauge 72 is used to detect the pressure reading. The main function of the pressure sensor is to measure and monitor the pressure in the connecting cylinder 41, which helps users understand the gas storage situation within the connecting cylinder 41. Once the gas storage amount in the connecting cylinder 41 reaches or exceeds the set value, the pressure sensor will upload the recorded value to the main control module. In specific implementation, when the raw material of the injection molding machine exits, a certain gas pressure will be generated. At this time, the pressure gauge 72 will monitor the gas pressure in real time and transmit the pressure signal to the main control module. The main control module compares the preset pressure threshold and pressure index to determine whether it is necessary to start the gas exhaust device for venting. If venting is required, the main control module will output a control signal to control the working state of the exhaust component 42 to achieve gas venting. When the gas is stored in the connecting cylinder 41 to a certain amount, the exhaust system will be started to vent the gas in the connecting cylinder 41. During the gas storage process, the raw material is subjected to shear force and continuously tumbles in the processing tank 11. The gas generated during the tumbling process enters the connecting cylinder 41 from the gas flow channel 2. Since the gas is relatively light, it can be stored in the connecting cylinder 41, which facilitates the storage of a certain amount of gas before venting and also saves energy.

[0027] like Figure 3As shown, during the gas emission process of the injection molding machine, it is necessary to control the gas emission to meet process requirements and avoid safety issues. In one embodiment, the gas flow channel 2 includes a first flow channel 21 and a second flow channel 22. The first flow channel 21 is connected to the processing tank 11, and the second flow channel 22 is located at the top of the first flow channel 21. A blocking part is provided at the connection between the second flow channel 22 and the first flow channel 21. The blocking part is used to block solids. The blocking part does not completely cover the opening of the second flow channel 22. The first flow channel 21 and the second flow channel 22 form a relatively long exhaust distance. Since solids cannot overcome their own gravity, they enter the second flow channel 22 from the first flow channel 21. This effectively avoids material leakage and blockage of the gas flow channel 2, ensuring that the gas can be smoothly discharged from the gas flow channel 2, and further optimizing the risk of raw materials blocking the gas flow channel 2.

[0028] In the above embodiment, when the injection molding machine is working, the gas channel 2 can also slide on the pipe wall. Specifically, the length of the gas channel 2 is proportional to the pressure in the processing tank 11. When the pressure in the processing tank 11 increases, the raw material will be pressurized and overflow from the gas channel 2. In order to avoid the raw material from blocking the gas channel 2 and causing blockage, when the pressure increases, the gas channel 2 rotates from the initial vertical state to the inclined state. The degree of inclination is related to the pressure. The greater the pressure, the greater the degree of inclination. This allows the length of the gas channel 2 to be varied within a limited pipe wall thickness, so that the gas channel 2 can adjust the length of the gas channel according to the pressure change. When the pressure decreases, the gas channel 2 returns to the initial state of being perpendicular to the pipe wall. At this time, if there is raw material blocking the gas channel 2, the raw material is only subjected to a small part of the pressure and its own gravity. The raw material will flow out of the channel under the action of gravity, keeping the channel unobstructed, facilitating normal exhaust, and ensuring that the gas is completely discharged.

[0029] If the connecting cylinder 41 is located at the bottom or in another low position on the base 1, the raw material may enter the connecting cylinder 41 along with the gas, causing the connecting cylinder 41 to become blocked. When the screw module 3 heats and melts the raw material, gas will be generated. If the gas is not discharged in time, it will affect the molding quality of the product. The top of the gas channel 2 is sealed with the connecting cylinder 41. When the raw material is melted, the generated gas is discharged from the processing tank 11 through the gas channel 2. After the melted raw material enters the gas channel 2, it will also slide down under its own gravity and leave the gas channel 2. The exhaust assembly 42 is equipped with a temperature control module, and a temperature sensor 13 is installed in the processing tank 11 to monitor the gas temperature in the processing tank 11. In a closed space, the diffusion of gas is achieved by the random motion of molecules and the interaction between molecules. Due to the continuous movement of gas molecules, they diffuse from areas of high concentration to areas of low concentration, and temperature changes affect the volume of the gas. According to the ideal gas law, when the temperature rises, the volume of the gas also increases, and there is a positive correlation between volume and temperature. As the temperature rises, the movement rate of gas molecules increases, resulting in them occupying more space. The temperature control module, screw module 3, and temperature sensor are all electrically connected to the main control module. The temperature sensor 13 feeds back the temperature information to the temperature control module, and the main control module adjusts the temperature at the temperature control module according to the preset control logic. For example, when the temperature of the temperature control module is lower than the temperature inside the processing tank 11, the main control module will drive the temperature control module to work, causing the gas temperature to rise; when the temperature inside the processing tank 11 is higher than the temperature at the temperature control module, the main control module will cause the temperature inside the processing tank 11 to drop, always keeping the temperature at the air outlet 411 higher than the temperature inside the processing tank 11. Due to the continuous movement of gas molecules, they will diffuse from areas of high concentration to areas of low concentration, and then, under the action of the screw module 3, move from the processing tank 11 to the air outlet 411, thus ensuring that the gas in the discharge tank is clean.

[0030] Injection molding machines generate harmful gases during the production process. These harmful gases mainly come from the heating and melting of plastics and may contain toxic gases such as benzene, toluene, ethylbenzene, and propylene, as well as particulates and other chemical substances such as volatile organic compounds (VOCs), nitrogen oxides, phenols, and alkanes. These harmful substances may have effects on human health, such as irritation and damage to the respiratory system and eyes, as well as damage to the central nervous system. Therefore, during the injection molding process, these waste gases need to be treated immediately to protect workers and the environment. In one embodiment, a temperature control module is installed between the connecting cylinder 41 and the exhaust assembly 42. The temperature control module includes a first temperature control unit 51 and a gas absorption tank 52. The first temperature control unit 51 is sleeved on the connecting cylinder 41 to raise the temperature at the connecting cylinder 41, facilitating the discharge of gas from the treatment tank 11. When the gas flows from the treatment tank 11 to the connecting cylinder 41, the gas absorption tank 52 is detachably connected to the connecting cylinder 41. A gas absorber is placed in the gas absorber 52. The reactant can be selected according to the actual production process, such as chemical reagents that react with harmful gases or products with adsorption properties, such as activated carbon, to treat the harmful gases before discharge, thus preventing environmental pollution and harm to the human body.

[0031] like Figure 2 As shown, existing injection molding machine exhaust devices are located near the injection molding machine to extract the gas generated by the machine and allow air circulation. However, since the main function of the exhaust device is to extract air to achieve air circulation, the exhaust environment is open to the outside and cannot guarantee a sealed state with the injection molding machine. In one embodiment, the exhaust assembly 42 includes an air inlet pipe 421, an air pump 422, and an exhaust pipe 423. The main function of the air pump 422 is to exhaust air from the enclosed space. Both the air inlet pipe 421 and the exhaust pipe 423 are connected to the air pump 422. The other end of the air inlet pipe 421 is connected to the connecting cylinder 41. The exhaust gas passes through the air pump 422 and is then discharged through the exhaust pipe 423. This ensures that the air pump 422 and the injection molding machine are in a relatively sealed space during exhaust, preventing new air from entering the injection molding machine. At the same time, it cleans up the gas generated in the treatment tank 11, so as not to affect the molding quality of the product.

[0032] like Figure 2As shown, the screw module 3 includes an extrusion barrel, a support shaft 32, a spiral blade 33, and a heating ring 34. The heating ring 34 is installed inside the extrusion barrel, and the support shaft 32 is also installed inside the extrusion barrel. The spiral blade 33 is provided on the outside of the support shaft 32. The extrusion barrel is a component in the injection molding machine used to extrude plastic raw materials. Its function is to push the plastic raw materials into the mold of the injection molding machine through extrusion. The support shaft 32 is used to support the operation of the entire injection molding machine. It can withstand the heavy load generated by the injection pressure and ensure the smooth operation of the injection molding machine. The spiral blade 33 is an important component in the injection molding machine used to transport plastic raw materials. It can transport plastic raw materials from the extrusion cylinder to the mold, and at the same time heat and mix the plastic raw materials to ensure the quality and uniformity of the plastic raw materials; the heating ring 34 is a component in the injection molding machine used to heat the mold. It can convert electrical energy into heat energy, and melt the plastic raw materials by heating the mold, thereby completing the injection molding process. Through the coordinated work of these components, the injection molding machine can smoothly complete the processes of plastic extrusion, transportation, heating and injection, and finally obtain injection molded products that meet the requirements.

[0033] like Figure 3 As shown, during the injection molding process, the plastic melt is further compressed and thermally decomposed in the compression section of the screw, and then pushed to the front end of the screw and enters the mold cavity. In this process, the compression ratio and pitch of the screw affect the conveying and melting degree of the plastic melt. In one embodiment, a concave-convex part 321 is provided in the middle part of the compression section of the screw module 3. The concave-convex part 321 is always located on one side of the gas flow channel 2. The pitch on the right side of the concave-convex part is greater than the pitch on the left side. The pitches at both ends of the compression section of the injection molding machine are not the same in order to better control the conveying and melting process of the plastic melt. A smaller pitch can allow the screw to form a larger compression ratio in the compression section, which is beneficial to the compression and thermal decomposition of the plastic melt and improves the conveying capacity and melting degree of the melt. A larger screw pitch can reduce the residence time of the plastic melt in the screw, avoiding excessive thermal decomposition and excessively long conveying distances. A smaller screw pitch results in a longer conveying distance and a longer preheating time. A larger screw pitch on the right side of the boss allows the material to accumulate and melt on the right side. Due to the structure of the boss, the gas and water vapor will form resistance and cause the material to run backward. Instead of carrying the material backward, the gas will be discharged through the vent, which can effectively solve the problems of gas discharge and material ejection, and help improve injection molding efficiency and product quality.

[0034] During the movement process, a gap may appear at the connection between the screw and the drive motor, causing air to flow into the processing tank 11. In addition to the gas generated during the melting process, the processing tank 11 is also affected by external gases. If the absolute sealing of the processing tank 11 cannot be guaranteed, the molten raw material will be affected by the gases, ultimately affecting the molding quality of the product. In one embodiment, a rotary sealing ring 8 is provided at the end of the cutting screw near the motor. When the cutting screw is injecting glue, it needs to slide in the processing tank 11 to move the cutting screw to the molding plate. In order to ensure that the water vapor and waste generated during the melting process will not leak out, this rotary sealing ring 8 will move with the cutting screw, which can maintain the sealing state during the movement of the cutting screw, ensure that the gas is discharged smoothly, and improve the dimensional accuracy and molding quality of the product.

[0035] like Figure 2 As shown, controlling the raw material feed rate and speed of the feeding device 6 can lead to excessive screw load, resulting in screw damage or injection molding machine malfunction. Secondly, if the raw material enters the screw too quickly, it may cause uneven injection speed, affecting the quality and appearance of the injection molded product. Simultaneously, if the raw material enters the screw too slowly, it may prolong the molding cycle, thus reducing production efficiency. In one embodiment, the feeding device 6 includes a hopper 61, a butterfly valve 62, and an injection head plate 63. The hopper 61 is installed on the machine base 1 and is conical, with the dimension at the connection point to the machine base 1 smaller than the end furthest from the machine base 1. The injection head plate 63 is located inside the hopper 61. During injection, the cutting screw, through rotation and back-and-forth movement, transports the plastic raw material to the injection head plate 63. The material is melted and conveyed forward. The injection head plate 63 also rotates with the cutting screw to maintain synchronization with the screw. The butterfly valve 62 is located at the bottom of the hopper 61. When the angle of the butterfly valve 62 is rotated, the diameter of the channel is changed, thereby changing the flow rate. The butterfly valve 62 is a semi-circular rotating blade. When the butterfly valve 62 rotates, the raw material will pass through the butterfly valve 62, changing its position to change the flow rate. The butterfly valve 62 is used to control the flow rate of the raw material entering the processing tank 11, ensuring that the raw material in the processing tank 11 is suitable for separation, melting and mixing. The top of the connecting cylinder 41 is provided with an upper end cover 9, which is made of transparent PC fluororubber material, so as to facilitate observation of whether there is raw material entering the connecting cylinder 41, timely detection and timely processing of raw material entering the connecting cylinder 41, and ensuring smooth exhaust.

[0036] like Figure 3As shown, a glue injection panel module is installed on the base 1. The glue injection panel module is electrically connected to the main control module. A digital display pressure sensor 71 is installed on the glue injection panel module. The connecting cylinder 41 is also provided with a downdraft 412. The downdraft 412 is connected to the glue injection panel module through a pipe, so as to realize the connection with the digital display pressure sensor 71. If the pressure exceeds the limit, the main control module will alarm. The pressure ratio of the connecting cylinder 41 is monitored to realize the alarm function so that necessary measures can be taken in time. The connecting cylinder 41 is also connected to a pressure gauge 72, which is used to observe the pressure index in real time.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A gas emission device for an injection molding machine, comprising a base (1) and a main control module; a processing tank (11) is provided inside the base (1), and a gas flow channel (2) is provided through the side wall of the base (1), the gas flow channel (2) being located at the end of the base (1) near the raw material outlet; a connecting cylinder (41) is provided on the outer side of the base (1), the connecting cylinder (41) covering the opening of the gas flow channel (2) and maintaining a seal; the connecting cylinder (41) is provided with an air outlet (411), the air outlet (411) being connected to an exhaust assembly (42), and the connecting cylinder (41) is also equipped with a pressure gauge (72), the pressure gauge (72) being electrically connected to the main control module, the pressure gauge (72) being used to detect the pressure index; characterized in that, The gas flow channel (2) includes a first flow channel (21) and a second flow channel (22). The first flow channel (21) is connected to the processing tank (11). The second flow channel (22) is located at the top of the first flow channel (21). The first flow channel (21) and the second flow channel (22) are connected but staggered. The length of the gas flow channel (2) can be adjusted according to the pressure in the processing tank (11). The device also includes a screw module (3), which is rotatably mounted on the processing tank (11). The screw module (3) includes an extrusion cylinder, a spiral blade (33), and a heating ring (34). The heating ring (34) is installed inside the extrusion cylinder. A support shaft (32) is also installed inside the extrusion cylinder. The spiral blade (33) is installed on the outside of the support shaft (32). A rotating sealing ring (8) is provided at the end of the support shaft (32) near the motor. A concave-convex part (321) is provided in the middle part of the compression section of the support shaft (32). The concave-convex part (321) is always located on one side of the gas flow channel (2). The pitch on the right side of the concave-convex part (321) is greater than the pitch on the left side. The concave-convex part (321) is used to block the raw material and the gas.

2. The gas emission device for an injection molding machine according to claim 1, characterized in that, The connecting cylinder (41) is equipped with a temperature control module, and the processing tank (11) is equipped with a temperature sensor (13). The temperature control module and the temperature sensor (13) are both electrically connected to the main control module. By setting the temperature of the temperature control module to be higher than the temperature in the processing tank (11), the gas in the processing tank (11) is guided to flow to the gas channel (2).

3. The gas emission device for an injection molding machine according to claim 2, characterized in that, The temperature control module is installed between the connecting cylinder (41) and the exhaust assembly (42); the temperature control module includes a first temperature control unit (51) and a gas absorption tank (52); the first temperature control unit (51) is sleeved on the exhaust port of the connecting cylinder (41), the gas absorption tank (52) is detachably connected to the air outlet (411), and a gaseous reactant is placed in the gas absorption tank (52).

4. The gas emission device for an injection molding machine according to claim 1, characterized in that, The exhaust assembly (42) includes an intake pipe (421), an air pump (422), and an exhaust pipe (423); the intake pipe (421) is connected to the connecting cylinder (41), and both the intake pipe (421) and the exhaust pipe (423) are connected to the air pump (422).

5. A gas emission device for an injection molding machine according to claim 1, characterized in that, It also includes a feeding device (6), which is installed on the top of the machine base (1) and communicates with the processing tank (11); the feeding device (6) includes a hopper (61), a butterfly valve (62), and a glue injection head plate (63); the hopper (61) is installed on the machine base (1), the hopper (61) is conical, and the size of the hopper (61) gradually increases from the connection point of the machine base (1) upwards; the glue injection head plate (63) is located inside the hopper (61), and the butterfly valve (62) is located at the bottom of the hopper (61).

6. A gas emission device for an injection molding machine according to claim 1, characterized in that, The connecting cylinder (41) is provided with an upper end cap (9) at the top, and the upper end cap (9) is made of transparent PC fluororubber material.

7. A gas emission device for an injection molding machine according to claim 1, characterized in that, The base (1) is provided with a glue injection panel module, which is electrically connected to the main control module; the glue injection panel module is equipped with a digital display pressure sensor (71); the connecting cylinder (41) is also provided with a downdraft (412), which is connected to the glue injection panel module through a pipe.

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