An injection molding apparatus for the production of plastic automotive trim

Abstract

This invention relates to the field of automotive parts processing technology, specifically disclosing an injection molding device for the production of plastic automotive trim parts. The device includes an injection molding material block and an injection molding block, with the injection molding block positioned above and in contact with the injection molding material block. The injection molding material block has a feed inlet. The device also includes an air removal mechanism; the air removal mechanism includes a blower, a recessed block, a moving tube, air removal components symmetrically arranged on both sides of the moving tube, a drive component for driving the moving tube to reciprocate along the length of the recessed block, a chamber on the injection molding material block, and an air inlet on the moving tube. The blower and the recessed block are both fixedly connected to the chamber; the moving tube is slidably connected to the recessed block. The air removal components include an air supply pipe, a sliding hole on the chamber, a through hole on the moving tube, and an air supply hole on the air supply pipe; the sliding hole communicates with the feed inlet. This solves the problem of feed inlet blockage easily occurring after injection molding of the injection molding material in existing injection molding devices.

Description

Technical Field

[0001] This invention relates to the field of automotive parts processing technology, and more specifically to an injection molding equipment for the production of plastic automotive trim parts. Background Technology

[0002] In the automotive manufacturing industry, plastic parts are increasingly widely used due to their advantages such as light weight, low cost, and flexible molding. From interior parts such as dashboards and door panels, to exterior parts such as bumpers and grilles, and functional parts such as engine peripheral components, plastic materials are used extensively. Injection molding, as the core manufacturing process for automotive plastic parts, directly determines the production efficiency and quality level of the parts due to the stability of its process.

[0003] The core process of injection molding involves plasticizing and melting the raw material in an injection molding machine, then injecting it into the mold cavity through the feed port. After the melt cools and solidifies, the molded part is obtained. In this process, the feed port, as the key channel for the molten plastic to enter the mold, is crucial to injection molding production. However, in actual production scenarios, when the feed port becomes blocked, the melt cannot enter the mold cavity normally, resulting in defects such as insufficient material or incomplete filling, reducing product yield and increasing production costs.

[0004] Therefore, developing a technical solution that can effectively prevent clogging of the feed inlet during the injection molding process of automotive plastic parts has become an urgent need for the automotive manufacturing industry to improve production efficiency and ensure product quality. Summary of the Invention

[0005] This invention provides an injection molding device for the production of plastic automotive trim parts, which solves the problem that the feed inlet of existing injection molding equipment is prone to blockage after the injection material is injected.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an injection molding equipment for the production of plastic automotive trim parts, comprising an injection molding raw material block and an injection molding block, the injection molding block being located above and in contact with the injection molding raw material block, the injection molding raw material block having a feed inlet; further comprising an air removal mechanism; the air removal mechanism comprising a blower, a recessed block, a moving pipe, air removal components symmetrically arranged on both sides of the moving pipe, a drive component for driving the moving pipe to reciprocate along the length direction of the recessed block, a chamber on the injection molding raw material block, and an air inlet on the moving pipe; the blower and the recessed block are both fixedly connected to the chamber; the moving pipe is slidably connected to the recessed block; the air removal components comprising an air supply pipe, a sliding hole on the chamber, a through hole on the moving pipe, and an air supply hole on the air supply pipe; the sliding hole communicates with the feed inlet; one end of the air supply pipe communicates with the through hole, and the other end of the air supply pipe is located inside the sliding hole; the diameter of the air supply pipe gradually decreases along the length direction of the air supply pipe away from the location of the sliding hole.

[0007] The principles and advantages of this scheme are: During the blowing of the blower, the reciprocating motion of the moving pipe drives the air supply pipe to penetrate into different areas of the feed inlet. With the continuous air flow, blockages can be swept away section by section, which has a good separation effect, especially on raw materials that have been softened and stuck together due to high temperature.

[0008] Secondly, airflow can disrupt the "liquid bridge" effect between raw material particles (caused by moisture or residual heat), reducing the likelihood of particle re-agglomeration and preventing re-clogging shortly after clearing. Furthermore, the ambient temperature air introduced by the blower helps lower the local temperature at the feed inlet, preventing low-softening-point raw materials from clumping due to continued softening from residual heat. Simultaneously, airflow disturbance can redisperse the particles, restoring their free-flowing state, which is particularly suitable for raw materials with high hygroscopicity or a high content of fine powder.

[0009] The diameter of the air supply duct gradually decreases along its length towards the location of the sliding hole. This causes the gap between the air supply duct and the sliding hole to gradually change during movement, allowing the airflow within the chamber to be discharged into the feed inlet along the sliding hole. First, the airflow discharged through the sliding hole is continuously output from a fixed position, forming a stable "anchor point" and delivering concentrated impact, effectively breaking down stubborn blockage clumps. Second, the fixed-point and dynamic airflows create turbulence superposition at their spatial intersection, increasing the intensity of airflow turbulence, disrupting the cohesion between raw material particles, and promoting the suspension and removal of loose materials. Simultaneously, when the moving duct approaches the sliding hole, the dynamic airflow may block the fixed-point airflow; however, the gradually decreasing diameter design increases the airflow velocity at the dynamic end, making it more penetrating. Both airflows dominate the unblocking process at different stages, achieving efficient energy utilization through staggered peak times.

[0010] The air supply duct is designed as a tapered tube. Based on the principle of continuity, the reduced cross-sectional area of ​​the air supply duct leads to an increase in air velocity. The airflow maintains high kinetic energy even after penetrating deep into the feed inlet, effectively impacting tightly adhered or blockage materials located in narrow areas. At the same time, the tapered diameter makes the airflow more concentrated, reducing lateral diffusion of the airflow during transmission and ensuring that more energy is applied to the blockage area, improving the accuracy of unblocking.

[0011] Furthermore, the air removal assembly also includes a scraping section; the scraping section includes a guide cylinder, a moving block, a scraping block, and a power unit for driving the moving block to reciprocate along the length of the guide cylinder; the guide cylinder is fixedly connected to the moving pipe; one end of the moving block is slidably connected to the guide cylinder, and the other end of the moving block is located inside the air supply pipe; the scraping block is fixedly connected to the moving block, and the scraping block is located inside the air supply hole.

[0012] As the scraper block reciprocates within the air inlet, it removes dust, moisture condensation, or high-temperature carbonization residue adhering to the inlet wall, preventing these substances from gradually accumulating and causing a reduction in the flow cross-section or even complete blockage. Furthermore, unobstructed air inlets ensure that the airflow is ejected in the designed direction and at the designed speed, preventing airflow deflection or eddies caused by partial obstruction, which could affect the impact on raw materials clogging the feed inlet.

[0013] Furthermore, the air removal assembly also includes an auxiliary part; the auxiliary part includes a guide rod, a nut seat, an air plate, and a motion unit for driving the nut seat to reciprocate along the length of the guide rod; the guide rod is fixedly connected to the moving tube; the nut seat is slidably connected to the guide rod; the air plate is connected to the nut seat, and the air plate is in contact with the air inlet.

[0014] During the movement of two air vanes along the length of the air inlet, moving closer and further apart, the airflow is limited when the vanes move inward, narrowing the inlet opening. This is suitable for low-speed, stable flow cleaning or preventing excessive airflow from disturbing unblocked areas. Conversely, when the vanes move outward, the opening widens, increasing the airflow for high-intensity impact against stubborn blockages. Furthermore, the periodic opening and closing of the vanes creates pulsed airflow, thereby enhancing the fatigue-breaking effect on adhered injection-molded materials.

[0015] Furthermore, the auxiliary part also includes an auxiliary unit; the auxiliary unit includes a connecting rod, a first spring, an auxiliary block, an auxiliary groove on the moving tube, a sliding groove on the nut seat, and a drive unit for driving the auxiliary block to reciprocate along the length of the auxiliary groove; one end of the connecting rod is slidably connected to the sliding groove, and the other end of the connecting rod is fixedly connected to the air plate; both ends of the first spring are respectively connected to the auxiliary groove and the auxiliary block; the auxiliary block is slidably connected to the auxiliary groove, and the auxiliary block abuts against the air plate.

[0016] As the two air deflectors gradually adjust the diameter of the air inlets, they also reciprocate away from their contact points with the inlets. Therefore, this reciprocating motion causes the inlet opening to change periodically, creating intermittent pressurization and depressurization, resulting in a pulsed airflow. This pulsating airflow exerts an alternating "impact-relaxation" effect on adherent materials, more easily disrupting their cohesion, and is particularly suitable for carbonized or highly viscous blockages. Simultaneously, the rapid closing of the air deflectors can instantly increase the air pressure inside the pipe, and when suddenly opened, it forms a high-speed jet, significantly enhancing the penetration of deep blockages. Compared to a constant airflow, this "energy storage-release" mode is more efficient.

[0017] Furthermore, the air removal assembly also includes an air guide section; the air guide section includes a piston cylinder, a piston block, an air inlet pipe, an air outlet pipe, an air guide pipe, an air guide hole opened on the air guide pipe, and a linkage unit for driving the piston block to reciprocate along the length direction of the piston cylinder; the piston cylinder is fixedly connected to the moving pipe; the piston block is slidably connected to the piston cylinder; the air inlet pipe is connected to the piston cylinder and communicates with the piston cylinder; the air outlet pipe is connected to the piston cylinder; the air guide pipe is connected to the air outlet pipe, and the air guide hole faces the air supply pipe.

[0018] The piston block reciprocates within the piston cylinder, periodically compressing gas and discharging it through the air guide tube and air vent, superimposing a pulse characteristic onto the main airflow entering the air supply duct. This "pulsating air jet" has a stronger fatigue-destructive effect on adhesive blockages. Furthermore, the high-pressure pulsed airflow, directed towards the air supply duct through the air guide tube, merges with the main air jet in the same direction, creating a localized instantaneous high-speed jet. This significantly enhances the penetration capability into narrow or deep blockage areas, preventing airflow attenuation from causing blockage clearing failure.

[0019] Furthermore, the air guide section also includes a diffuser pipe, several diffuser holes on the diffuser pipe, and a top hole on the moving pipe; one end of the diffuser pipe is connected to the air intake pipe, and the other end of the diffuser pipe passes through the top hole and extends out of the moving pipe.

[0020] The diffuser tube creates a gradually widening channel between itself and the intake tube, reducing airflow velocity and increasing static pressure. This reduces intake resistance, allowing more airflow to be efficiently drawn into the piston cylinder and improving overall airflow output. The multiple diffuser holes on the diffuser tube, providing distributed airflow, prevent localized vacuum or airflow bias caused by a single inlet, ensuring stable air intake throughout the piston cylinder's reciprocating motion and reducing uneven pulsation.

[0021] Meanwhile, the diffuser tube extends outside the moving tube, allowing air to be drawn directly from a more open space, avoiding insufficient air intake caused by the narrow space inside the moving tube or local negative pressure. It is especially suitable for high-frequency reciprocating operation of the moving tube.

[0022] Furthermore, the air guide section also includes a first gear, a first rack, and a fixed groove on the moving block; the air intake pipe is rotatably connected to the piston cylinder; the first gear is fixedly connected to the air intake pipe; the first rack is fixedly connected to the fixed groove, and the first rack meshes with the first gear.

[0023] During the rotation of the intake pipe, the diffuser pipe changes direction, allowing its diffuser orifices to actively align with areas of higher wind speed or lower negative pressure within the chamber, thereby capturing stronger airflow and improving intake efficiency. Secondly, by adjusting the angle of the diffuser pipe, the pressure differential environment of each diffuser orifice can be controlled, resulting in more uniform multi-point air intake and preventing some orifices from being overloaded while others remain idle, thus extending the system's operational stability. Simultaneously, as the moving pipe reciprocates within the feed inlet, the synchronous rotation of the intake pipe keeps the diffuser pipe in its optimal air intake posture, achieving "moving and drawing in simultaneously," ensuring a continuous and efficient air supply for the pulse airflow system.

[0024] Furthermore, the power unit includes a power block, a power hole opened on the air supply pipe, and a second spring; one end of the power block is fixedly connected to the moving block, and the other end of the power block passes through the power hole and is close to the inner wall of the feed inlet; the two ends of the second spring are respectively connected to the moving block and the guide cylinder.

[0025] When the air supply duct is not in motion, the injection molding material will flow into the injection molding material block along the inlet for injection molding. The power block can serve as a fixed structure when the air supply duct is not in motion, to guide the injection molding material to flow smoothly into the cavity along its surface, reducing turbulence or vortices caused by sudden changes in the flow channel.

[0026] After the injection molding material is formed, and during the reciprocating motion of the air supply pipe, the power block can, under the combined action of the inner wall of the feed port and the second spring, cause the moving block to reciprocate relative to the length direction of the air supply pipe.

[0027] Furthermore, the motion unit is a screw; two screws are fixedly connected to form a rotating shaft, which is rotatably connected to the moving tube; the nut seat is threadedly connected to the screw; it also includes a linkage component; the linkage component includes a second gear and a second rack; the second gear is fixedly connected to the rotating shaft; the second rack is fixedly connected to the chamber, and the second gear meshes with the second rack.

[0028] During the movement of the moving tube, the screw rotates through the meshing of the second gear and the second rack. During the rotation of the screw, the nut seat can reciprocate along the axial direction of the screw.

[0029] Furthermore, the drive unit includes a drive shaft, a cam, a third spring, and a drive component for rotating the drive shaft; the drive shaft is rotatably connected to the moving tube; the cam is fixedly connected to the drive shaft and abuts against the auxiliary block; the two ends of the third spring are respectively connected to the auxiliary block and the auxiliary groove.

[0030] During the rotation of the drive shaft, the cam moves synchronously. During the rotation of the cam, when the cam's protrusion abuts against the auxiliary block, the auxiliary block moves away from the drive shaft, and the third spring is compressed; when the cam's protrusion no longer abuts against the auxiliary block, the auxiliary block moves towards the auxiliary shaft under the action of the third spring. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of an embodiment of an injection molding equipment for the production of plastic automotive trim parts according to the present invention.

[0032] Figure 2 for Figure 1 A schematic diagram of the internal structure of the injection molding raw material block cavity.

[0033] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0034] Figure 4 for Figure 2 A schematic diagram of the internal structure of the moving tube.

[0035] Figure 5 for Figure 4 Enlarged view of point B in the middle.

[0036] Figure 6 for Figure 5 Enlarged view of point C in the middle.

[0037] Figure 7 for Figure 4 A schematic diagram of the internal structure of the central air supply duct.

[0038] Figure 8 for Figure 7 Enlarged view of point D in the middle. Detailed Implementation

[0039] The following detailed description illustrates the specific implementation method: The reference numerals in the accompanying drawings include: 1. Injection molding material block; 2. Injection molding block; 3. Feed port; 4. Blower; 5. Concave block; 6. Moving pipe; 7. Chamber; 8. Air supply pipe; 9. Air supply hole; 10. Cylinder; 11. Fixed block; 12. Guide cylinder; 13. Moving block; 14. Scraper block; 15. Guide rod; 16. Nut seat; 17. Air vane; 18. Connecting rod; 19. Auxiliary block; 20. Piston cylinder; 21. Piston block; 22. Air inlet pipe; 23. Air guide pipe; 24. Flow diffuser pipe; 25. Flow diffuser hole; 26. First gear; 27. First rack; 28. Power block; 29. ​​Screw; 30. Second gear; 31. Drive shaft; 32. Cam; 33. Second rack; 34. Third gear.

[0040] The basic implementation examples are as follows: Figure 1 , 2 As shown in 3, 4, 5, 6, 7, and 8: Embodiments of the present invention provide an injection molding equipment for the production of plastic automotive trim parts, including an injection molding raw material block 1 and an injection molding block 2. The injection molding block 2 is located above and in contact with the injection molding raw material block 1. The injection molding raw material block 1 has a feed inlet 3. The equipment also includes an air removal mechanism; the air removal mechanism includes a blower 4, a recess 5, a moving pipe 6, air removal components symmetrically arranged on both sides of the moving pipe 6, a drive component for driving the moving pipe 6 to reciprocate along the length direction of the recess 5, a chamber 7 on the injection molding raw material block 1, and an opening... The moving pipe 6 has an air inlet hole; the blower 4 and the recess 5 are both fixedly connected to the chamber 7; the moving pipe 6 and the recess 5 are slidably connected; the air removal assembly includes an air supply pipe 8, a sliding hole on the chamber 7, a through hole on the moving pipe 6, and air supply holes 9 symmetrically opened on the upper and lower sides of the air supply pipe 8; the sliding hole communicates with the feed inlet 3; one end of the air supply pipe 8 is connected to the through hole, and the other end of the air supply pipe 8 is located in the sliding hole; the air supply pipe 8 can slide in and out of the sliding hole; the diameter of the air supply pipe 8 gradually decreases along the length of the air supply pipe 8 away from the location of the sliding hole.

[0041] The drive assembly includes a cylinder 10 and a fixed block 11; the cylinder 10 is fixedly connected to the chamber 7; the fixed block 11 is fixedly connected to the moving tube 6, and the output shaft of the cylinder 10 is fixedly connected to the fixed block 11.

[0042] The air removal assembly also includes a scraping section; the scraping section includes a guide cylinder 12, a moving block 13, a scraping block 14, and a power unit for driving the moving block 13 to reciprocate along the length of the guide cylinder 12; the guide cylinder 12 is fixedly connected to the moving pipe 6; one end of the moving block 13 is slidably connected to the guide cylinder 12, and the other end of the moving block 13 is located inside the air supply pipe 8; the scraping block 14 is fixedly connected to the moving block 13, and both ends of the scraping block 14 are located inside the upper and lower air supply holes 9 respectively.

[0043] The air removal assembly also includes an auxiliary part; the auxiliary part includes a guide rod 15, a nut seat 16, an air plate 17, and a motion unit for driving the nut seat 16 to reciprocate along the length of the guide rod 15; the guide rod 15 is fixedly connected to the moving tube 6; the nut seat 16 is slidably connected to the guide rod 15; the air plate 17 is connected to the nut seat 16, and the air plate 17 is in contact with the air inlet.

[0044] The auxiliary part also includes an auxiliary unit; the auxiliary unit includes a connecting rod 18, a first spring, an auxiliary block 19, an auxiliary groove on the moving tube 6, a sliding groove on the nut seat 16, and a drive unit for driving the auxiliary block 19 to reciprocate along the length of the auxiliary groove; one end of the connecting rod 18 is slidably connected to the sliding groove, and the other end of the connecting rod 18 is fixedly connected to the air plate 17; both ends of the first spring are respectively connected to the auxiliary groove and the auxiliary block 19; the auxiliary block 19 is slidably connected to the auxiliary groove, and the auxiliary block 19 abuts against the air plate 17.

[0045] The air removal assembly also includes an air guide section; the air guide section includes a piston cylinder 20, a piston block 21, an inlet pipe 22, an outlet pipe, an air guide pipe 23, an air guide hole on the air guide pipe 23, and a linkage unit for driving the piston block 21 to reciprocate along the length of the piston cylinder 20; the piston cylinder 20 is fixedly connected to the moving pipe 6; the piston block 21 is slidably connected to the piston cylinder 20; the inlet pipe 22 is connected to the piston cylinder 20 and communicates with the piston cylinder 20, and the inlet pipe 22 is provided with a first one-way valve for gas to flow unidirectionally from the inlet pipe 22 to the piston cylinder 20; the outlet pipe communicates with the piston cylinder 20; the outlet pipe is provided with a second one-way valve for gas to flow unidirectionally from the piston cylinder 20 to the outlet pipe; the air guide pipe 23 communicates with the outlet pipe, and the air guide hole faces the air supply pipe 8.

[0046] The air guide section also includes a diffuser pipe 24, several diffuser holes 25 opened on the diffuser pipe 24, and a top hole opened on the moving pipe 6; one end of the diffuser pipe 24 is connected to the air inlet pipe 22, and the other end of the diffuser pipe 24 passes through the top hole and extends out of the moving pipe 6; the diameter of the diffuser pipe 24 is larger than the diameter of the air inlet pipe 22.

[0047] The air guide section also includes a first gear 26, a first rack 27, and a fixed groove on the moving block 13; the air inlet pipe 22 is rotatably connected to the piston cylinder 20; the first gear 26 is fixedly connected to the air inlet pipe 22; the first rack 27 is fixedly connected to the fixed groove, and the first rack 27 meshes with the first gear 26.

[0048] The power unit includes a power block 28, a power hole on the air supply pipe 8, and a second spring; one end of the power block 28 is fixedly connected to the moving block 13, and the other end of the power block 28 passes through the power hole and is close to the inner wall of the feed inlet 3; the two ends of the second spring are respectively connected to the moving block 13 and the guide cylinder 12.

[0049] The motion unit is a screw 29; two screws 29 are fixedly connected to form a rotating shaft, which is rotatably connected to the moving tube 6; the nut seat 16 is threadedly connected to the screw 29; it also includes a linkage component; the linkage component includes a second gear 30 and a second rack 33; the second gear 30 is fixedly connected to the rotating shaft; the second rack 33 is fixedly connected to the chamber 7, and the second gear 30 meshes with the second rack 33.

[0050] The drive unit includes a drive shaft 31, a cam 32, a third spring, and a drive component for rotating the drive shaft 31; the drive shaft 31 is rotatably connected to the moving tube 6; the cam 32 is fixedly connected to the drive shaft 31 and abuts against the auxiliary block 19; the two ends of the third spring are respectively connected to the auxiliary block 19 and the auxiliary groove.

[0051] The linkage unit is the fourth spring; the two ends of the fourth spring are connected to the piston block 21 and the piston cylinder 20 respectively; the cam 32 abuts against the piston block 21.

[0052] The driving component includes a third gear 34, a third rack, and a bottom groove on the moving block 13; the third gear 34 is fixedly connected to the drive shaft 31; the third rack is fixedly connected to the bottom groove; and the third gear 34 meshes with the third rack.

[0053] Specific implementation process: When the air supply pipe 8 is not in motion, the injection molding material will flow into the injection molding material block 1 through the feed inlet 3 for injection molding. The power block 28 can serve as a fixed structure when the air supply pipe 8 is not in motion, to guide the injection molding material to flow smoothly into the cavity along its surface, reducing turbulence or vortex caused by sudden changes in the flow channel.

[0054] After the injection molding of the raw material, cylinder 10 is activated, and the output shaft of cylinder 10 drives the moving tube 6 to reciprocate along the length of the concave block 5. At the same time, blower 4 is activated, causing blower 4 to generate airflow into chamber 7. During the airflow generated by blower 4, in conjunction with the reciprocating motion of moving tube 6, the air supply tube 8 is driven into different areas of the feed inlet 3. With the continuous airflow, blockages can be cleared section by section, especially for raw materials that have softened and adhered due to high temperature, which has a good separation effect.

[0055] Secondly, airflow can disrupt the "liquid bridge" effect between raw material particles (caused by moisture or residual heat), reducing the likelihood of particle re-agglomeration and preventing re-clogging shortly after clearing. Furthermore, the ambient temperature air introduced by blower 4 helps lower the local temperature at feed inlet 3, preventing low-softening-point raw materials from clumping due to continued softening from residual heat. Simultaneously, airflow disturbance can redisperse the particles, restoring their free-flowing state, which is particularly suitable for raw materials with high hygroscopicity or a high content of fine powder.

[0056] The diameter of the air supply duct 8 gradually decreases along its length towards the location away from the sliding hole. This causes the gap between the air supply duct 8 and the sliding hole to gradually change during movement, allowing the airflow in the chamber 7 to be discharged into the feed inlet 3 along the sliding hole. First, the airflow discharged through the sliding hole is continuously output from a fixed position, forming a stable "anchor point" and delivering concentrated impact, effectively breaking down stubborn blockage clumps. Second, the fixed-point and dynamic airflows generate turbulence superposition at the spatial intersection, increasing the intensity of airflow turbulence, disrupting the cohesion between raw material particles, and promoting the suspension and removal of loose materials. Simultaneously, when the moving pipe 6 approaches the sliding hole, the dynamic airflow may block the fixed-point airflow; however, the tapered pipe diameter design increases the airflow velocity at the dynamic end, making it more penetrating. Both dominate the unblocking process at different stages, achieving efficient energy utilization through peak-shifting.

[0057] The air supply duct 8 is designed as a tapered pipe. Based on the principle of continuity, the reduced cross-sectional area of ​​the air supply duct 8 leads to an increase in air velocity. The airflow maintains high kinetic energy even after penetrating deep into the feed inlet 3, effectively impacting tightly adhered or blockage materials located in narrow areas. At the same time, the tapered pipe diameter makes the airflow more concentrated, reducing the lateral diffusion of the airflow during transmission and ensuring that more energy is applied to the blockage area, thus improving the accuracy of clearing blockages.

[0058] After the injection molding material is formed, and during the reciprocating motion of the air supply pipe 8, the power block 28, under the combined action of the inner wall of the feed inlet 3 and the second spring, causes the moving block 13 to reciprocate relative to the length direction of the air supply pipe 8. During the movement of the moving block 13, the scraper block 14 moves synchronously.

[0059] During its reciprocating motion within the air inlet 9, the scraper block 14 removes dust, moisture condensate, or high-temperature carbonization residue adhering to the inlet wall, preventing these substances from gradually accumulating and causing a reduction in the flow cross-section or even complete blockage. Furthermore, ensuring the air inlet 9 remains unobstructed ensures the airflow is ejected in the designed direction and at the designed speed, preventing airflow deflection or eddies caused by partial obstruction, which could affect the impact on the raw material blocked at the feed inlet 3.

[0060] During the movement of the moving tube 6, the screw 29 rotates through the meshing of the second gear 30 and the second rack 33. During the rotation of the screw 29, the nut seat 16 reciprocates along the axial direction of the screw 29. During the movement of the nut seat 16, the fan plate 17 moves synchronously.

[0061] During the movement of the two air vanes 17 along the length of the air inlet, as they approach or move away from each other, the air vanes 17 move inward to reduce the opening of the air inlet, limiting the airflow. This is suitable for low-speed, stable flow cleaning or preventing excessive airflow from disturbing unblocked areas. When the air vanes 17 move outward to increase the opening, they increase the airflow, allowing for high-intensity impact on stubborn blockages. Furthermore, the periodic opening and closing of the air vanes 17 can create pulsed airflow, thereby enhancing the fatigue-breaking effect on adhered injection molding materials.

[0062] During the reciprocating motion of the moving block 13, the drive shaft 31 rotates synchronously through the meshing of the third gear 34 and the third rack. During the rotation of the drive shaft 31, the cam 32 moves synchronously. During the rotation of the cam 32, when the protrusion of the cam 32 abuts against the auxiliary block 19, the auxiliary block 19 moves away from the drive shaft 31, and the third spring is compressed; when the protrusion of the cam 32 no longer abuts against the auxiliary block 19, the auxiliary block 19 moves closer to the auxiliary shaft under the action of the third spring.

[0063] As the two air deflectors 17 gradually adjust the diameter of the air inlet, they also reciprocate away from their contact point with the air inlet, supported by the auxiliary block 19 and the first spring. Therefore, as the air deflectors 17 move away from and closer to their contact point with the air inlet, this reciprocating motion causes the air inlet opening to change periodically, creating intermittent pressurization and depressurization, resulting in a pulsed airflow. This pulsating airflow produces an alternating "impact-relaxation" effect on adherent materials, more easily breaking down their cohesion, and is particularly suitable for carbonized or highly viscous blockages. Simultaneously, the rapid closing of the air deflectors 17 can instantly increase the air pressure inside the pipe, and when suddenly opened, it forms a high-speed jet, significantly enhancing the penetration power against deep blockages. Compared to a constant airflow, this "energy storage-release" mode is more efficient.

[0064] During the rotation of cam 32, when the protrusion of cam 32 abuts against piston block 21, piston block 21 moves toward the position of piston cylinder 20, and the fourth spring is compressed; when the protrusion of cam 32 no longer abuts against piston block 21, piston block 21 is reset under the action of the third spring, and piston block 21 moves away from the position of piston cylinder 20.

[0065] During the reciprocating motion of piston block 21 within piston cylinder 20, periodically compressed gas is discharged through air guide pipe 23 from air guide hole, superimposing pulse characteristics on the main airflow entering air supply pipe 8. This "pulsating air jet" has a stronger fatigue-destructive effect on adhesive blockages. Furthermore, the high-pressure pulsed airflow discharged through the air guide hole towards air supply pipe 8 merges with the main air jet in the same direction, forming a localized instantaneous high-speed jet, significantly enhancing the penetration ability into narrow or deep blockage areas and preventing airflow attenuation from causing blockage clearing failure.

[0066] The diffuser 24 creates a gradually widening channel between it and the intake pipe 22, reducing airflow velocity and increasing static pressure. This reduces intake resistance, allowing more airflow to be efficiently drawn into the piston cylinder 20, thus improving overall airflow output. The multiple diffuser holes 25 on the diffuser 24 provide a distributed intake configuration to avoid localized vacuum or airflow bias caused by a single inlet, ensuring stable air intake throughout the reciprocating motion of the piston cylinder 20 and reducing uneven pulsation.

[0067] Meanwhile, the diffuser tube 24 extends out of the moving tube 6, allowing it to draw air directly from a more open space, thus avoiding insufficient air intake caused by the narrow internal space or local negative pressure of the moving tube 6. This is especially suitable for the high-frequency reciprocating operation of the moving tube 6.

[0068] During the movement of the moving block 13, the meshing of the first gear 26 and the first rack 27 causes the first gear 26 to drive the intake pipe 22 to rotate. During the rotation of the intake pipe 22, the diffuser pipe 24 changes direction, causing its diffuser orifice 25 to actively align with areas of higher wind speed or lower negative pressure within the chamber 7, thereby capturing stronger airflow and improving intake efficiency. Secondly, by adjusting the angle of the diffuser pipe 24, the pressure difference environment of each diffuser orifice 25 can be controlled, making multi-point air intake more uniform, avoiding overloading of some orifices while others remain idle, and extending the system's operational stability. Simultaneously, when the moving pipe 6 reciprocates within the feed inlet 3, the synchronous rotation of the intake pipe 22 keeps the diffuser pipe 24 in the optimal air intake posture, achieving "moving and sucking simultaneously," ensuring continuous and efficient air supply to the pulse airflow system.

[0069] In summary, the reciprocating motion of the air supply pipe 8, combined with the dynamic blowing of the air supply hole 9, achieves "scanning" unblocking of the feed inlet 3; the air deflector 17 adjusts the opening of the air inlet hole, precisely controlling the airflow intensity and pulse frequency, powerfully removing adhesive blockages; the diffuser 24 and piston cylinder 20 form a stable pulse airflow, ensuring a continuous and sufficient air supply; the rotation of the air inlet pipe 22 optimizes the air intake direction, further improving airflow utilization. The entire system combines active unblocking, adaptive adjustment, and stable air supply capabilities, thoroughly removing caking and accumulations within the feed inlet 3, ensuring smooth feeding, reducing the probability of blockage recurrence, and significantly improving production continuity and efficiency.

[0070] 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. An injection molding device for producing plastic automotive trim parts, comprising an injection molding raw material block and an injection molding block, wherein the injection molding block is located above and in contact with the injection molding raw material block, and the injection molding raw material block has a feed inlet, characterized in that: It also includes an air removal mechanism; the air removal mechanism includes a blower, a recessed block, a moving pipe, air removal components symmetrically arranged on both sides of the moving pipe, a drive component for driving the moving pipe to reciprocate along the length of the recessed block, a chamber opened on the injection molding material block, and an air inlet opened on the moving pipe; the blower and the recessed block are both fixedly connected to the chamber; the moving pipe is slidably connected to the recessed block; the air removal components include an air supply pipe, a sliding hole opened on the chamber, a through hole opened on the moving pipe, and an air supply hole opened on the air supply pipe; the sliding hole communicates with the feed inlet; one end of the air supply pipe communicates with the through hole, and the other end of the air supply pipe is located in the sliding hole; the diameter of the air supply pipe gradually decreases along the length of the air supply pipe away from the location of the sliding hole.

2. The injection molding equipment for producing plastic automotive trim parts according to claim 1, characterized in that: The air removal assembly also includes a scraping section; the scraping section includes a guide cylinder, a moving block, a scraping block, and a power unit for driving the moving block to reciprocate along the length of the guide cylinder; the guide cylinder is fixedly connected to the moving pipe; one end of the moving block is slidably connected to the guide cylinder, and the other end of the moving block is located inside the air supply pipe; the scraping block is fixedly connected to the moving block, and the scraping block is located inside the air supply hole.

3. The injection molding equipment for producing plastic automotive trim parts according to claim 2, characterized in that: The air removal assembly also includes an auxiliary part; the auxiliary part includes a guide rod, a nut seat, an air plate, and a motion unit for driving the nut seat to reciprocate along the length of the guide rod; the guide rod is fixedly connected to the moving tube; the nut seat is slidably connected to the guide rod; the air plate is connected to the nut seat and is attached to the air inlet.

4. The injection molding equipment for producing plastic automotive trim parts according to claim 3, characterized in that: The auxiliary part also includes an auxiliary unit; the auxiliary unit includes a connecting rod, a first spring, an auxiliary block, an auxiliary groove on the moving tube, a sliding groove on the nut seat, and a drive unit for driving the auxiliary block to reciprocate along the length of the auxiliary groove; one end of the connecting rod is slidably connected to the sliding groove, and the other end of the connecting rod is fixedly connected to the air plate; both ends of the first spring are respectively connected to the auxiliary groove and the auxiliary block; the auxiliary block is slidably connected to the auxiliary groove, and the auxiliary block abuts against the air plate.

5. An injection molding equipment for producing plastic automotive trim parts according to claim 2, characterized in that: The air removal assembly also includes an air guide section; the air guide section includes a piston cylinder, a piston block, an air inlet pipe, an air outlet pipe, an air guide pipe, an air guide hole on the air guide pipe, and a linkage unit for driving the piston block to reciprocate along the length of the piston cylinder; the piston cylinder is fixedly connected to the moving pipe; the piston block is slidably connected to the piston cylinder; the air inlet pipe is connected to the piston cylinder and communicates with the piston cylinder; the air outlet pipe is connected to the piston cylinder; the air guide pipe is connected to the air outlet pipe, and the air guide hole faces the air supply pipe.

6. An injection molding equipment for producing plastic automotive trim parts according to claim 5, characterized in that: The air guide section also includes a diffuser pipe, several diffuser holes on the diffuser pipe, and a top hole on the moving pipe; one end of the diffuser pipe is connected to the air inlet pipe, and the other end of the diffuser pipe passes through the top hole and extends out of the moving pipe.

7. An injection molding equipment for producing plastic automotive trim parts according to claim 6, characterized in that: The air guide section also includes a first gear, a first rack, and a fixed groove on the moving block; the air inlet pipe is rotatably connected to the piston cylinder; the first gear is fixedly connected to the air inlet pipe; the first rack is fixedly connected to the fixed groove, and the first rack meshes with the first gear.

8. An injection molding equipment for producing plastic automotive trim parts according to claim 2, characterized in that: The power unit includes a power block, a power hole on the air supply pipe, and a second spring; one end of the power block is fixed to the moving block, and the other end of the power block passes through the power hole and is close to the inner wall of the feed inlet; the two ends of the second spring are respectively connected to the moving block and the guide cylinder.

9. An injection molding equipment for producing plastic automotive trim parts according to claim 3, characterized in that: The motion unit is a screw; two screws are fixedly connected to form a rotating shaft, which is rotatably connected to the moving tube; the nut seat is threadedly connected to the screw; it also includes a linkage component; the linkage component includes a second gear and a second rack; the second gear is fixedly connected to the rotating shaft; the second rack is fixedly connected to the chamber, and the second gear meshes with the second rack.

10. An injection molding equipment for producing plastic automotive trim parts according to claim 4, characterized in that: The drive unit includes a drive shaft, a cam, a third spring, and a drive component for rotating the drive shaft; the drive shaft is rotatably connected to the moving tube; the cam is fixedly connected to the drive shaft and abuts against the auxiliary block; the two ends of the third spring are respectively connected to the auxiliary block and the auxiliary groove.

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