Blow molding air pipe fitting rim charge cutting device

Abstract

The utility model relates to the technical field of blow molding air pipe fitting machining, and discloses a blow molding air pipe fitting rim charge cutting device which comprises a machining table and a cutting rope, a fixing plate is fixedly connected to the rear side of the top of the machining table, and electric telescopic rods are fixedly connected to the left side and the right side of the top of the machining table. And clamping mechanisms are arranged on the top of the fixing plate and the front side of the top of the machining table, the clamping mechanisms are used for clamping blow molding air pipe fittings, and replacing mechanisms are arranged on the tops of the two electric telescopic rods and used for clamping and rapidly replacing cutting ropes. The hydraulic rod extends to drive the pushing disc to move downwards, the spring pushes the connecting plate and the rubber ball to clamp the pipe fitting through elastic force, the spring is reset and loosened when the hydraulic rod contracts, the self-adaptive clamping effect on the blow molding air pipe fitting is achieved, the self-adaptive clamping device can be compatible with pipe fittings of different specifications, clamping stability is guaranteed, displacement is prevented, pipe fitting damage caused by too large pressure is avoided, and the service life of the blow molding air pipe fitting is prolonged. And the machining precision and the yield are improved.

Description

Technical Field

[0001] This utility model relates to the field of blow-molded air duct processing technology, and in particular to a device for cutting off edge material of blow-molded air ducts. Background Technology

[0002] Blow-molded duct fittings are plastic pipe fittings manufactured using the blow molding process. They are mainly used in building ventilation systems, industrial exhaust gas emissions, and air conditioning ducts. The production process involves injecting heated and plasticized plastic raw materials into a mold, and then forming fittings with specific diameters, bends, or branch structures through a blow molding process. These fittings are lightweight, corrosion-resistant, low-cost, and easy to install, and are widely used in modern building and industrial piping systems. However, during the blow molding process, excess material is generated at the edges of the fittings. This excess material not only affects the appearance quality of the fittings but also leads to dimensional deviations during installation and can even affect the airflow stability of the ventilation system. Therefore, trimming excess material is a critical step in the production of blow-molded duct fittings.

[0003] Edge trimming requires first stabilizing the pipe fittings before the cutting mechanism completes the operation. However, existing clamping devices have significant limitations in adaptability. Edge trimming devices for blow-molded pipe fittings on the market use fixed or semi-fixed clamping structures. Some devices use mechanical clamps or pneumatic grippers to clamp the pipe fittings. By matching the preset clamping hole diameter or shape with the pipe fitting, the instability of manual fixing is avoided to a certain extent. This can achieve clamping of conventional straight pipes or standard elbows. However, the clamping components of these devices are mostly rigid structures, and their operation relies on mechanical positioning or cylinder drive. The pipe fittings are limited by fixed slots or molds.

[0004] However, due to the diverse shapes of blow-molded air ducts, the rigid clamping structure of existing devices is difficult to adapt to the different contours of various ducts. When faced with non-standard shaped ducts, the fixed-diameter clamps cannot match the diameter-changing parts of the ducts, and the parallel jaws are also difficult to fit irregular curved surfaces, resulting in local stress concentration during clamping. This not only causes scratches or deformation on the duct surface, but also causes the cutting position to shift due to unstable clamping, affecting the accuracy of edge material removal. In addition, it is necessary to manually change clamping modules of different specifications to adapt to different ducts, which is cumbersome and time-consuming. Especially in small-batch, multi-variety production scenarios, frequent clamping changes severely reduce production efficiency. This single-shape-adaptive clamping method makes it difficult for existing devices to balance clamping stability and duct protection when facing diverse blow-molded air ducts. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a blow molding duct edge trimming device, which aims to improve the existing technology's difficulty in balancing clamping stability and duct protection when dealing with diverse blow molding ducts.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a blow molding duct edge trimming device, comprising a processing table and a cutting rope, wherein a fixing plate is fixedly connected to the rear top of the processing table, and electric telescopic rods are fixedly connected to the left and right sides of the top of the processing table; a clamping mechanism is provided on the top of the fixing plate and the front top of the processing table, the clamping mechanism being used to clamp the blow molding duct; and a replacement mechanism is provided on the top of each of the two electric telescopic rods, the replacement mechanism being used to clamp and enable quick replacement of the cutting rope;

[0007] The clamping mechanism includes a hydraulic rod, which is fixedly connected to the top front end of the fixed plate. A push plate is fixedly connected to the bottom of the hydraulic rod. Multiple springs are fixedly connected at equal intervals to the bottom of the push plate and the top front side of the processing table. Each of the multiple springs has a damping component inside. A connecting plate is fixedly connected to one adjacent end of each of the multiple springs. A rubber ball is fixedly connected to one adjacent side of each of the multiple connecting plates.

[0008] As a further description of the above technical solution:

[0009] The replacement mechanism includes two L-shaped bases and two threaded adjusting rods. The two L-shaped bases are fixedly connected to the top ends of two electric telescopic rods. The bottom ends of the two threaded adjusting rods are fixedly connected to rotating round heads, which are rotatably connected to the inside of the two L-shaped bases. Steel plates are threadedly connected to the outside of the two threaded adjusting rods. Rubber sheets are fixedly connected to the bottom of the two steel plates. The bottom of the two rubber sheets and the top of the two L-shaped bases are both designed with a toothed shape.

[0010] As a further description of the above technical solution:

[0011] The damping assembly includes multiple damping sleeves, which are fixedly connected at equal intervals to the bottom of the push plate. Multiple springs are respectively sleeved on the outside of the multiple damping sleeves. A damping rod is slidably connected inside each of the multiple damping sleeves. The bottom ends of the multiple damping rods are respectively fixedly connected to the top of multiple connecting plates.

[0012] As a further description of the above technical solution:

[0013] The replacement mechanism also includes two rotating rings, which are fixedly connected to the tops of two threaded adjusting rods, and both rotating rings have an anti-slip design on their exterior.

[0014] As a further description of the above technical solution:

[0015] An emergency power supply compartment is fixedly connected to the bottom of the processing table, and multiple batteries are fixedly connected to the bottom inner side of the emergency power supply compartment.

[0016] As a further description of the above technical solution:

[0017] A charging port is provided on the rear side of the emergency power supply compartment, and a dust cover is rotatably connected to the top of the outer side of the charging port.

[0018] As a further description of the above technical solution:

[0019] Multiple power indicator lights are fixedly connected to the rear bottom of the emergency power supply compartment, and these power indicator lights are electrically connected to multiple batteries.

[0020] As a further description of the above technical solution:

[0021] Flame-retardant plates are provided between the multiple batteries, and the outer sides of the flame-retardant plates are fixedly connected to the inner perimeter of the emergency power compartment.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the extension of the hydraulic rod drives the push plate to move downward, compresses the spring and triggers the damping component. The spring force pushes the connecting plate and rubber ball to clamp the pipe fitting. When the hydraulic rod retracts, the spring resets and releases, achieving an adaptive clamping effect for blow molding pipe fittings. It is compatible with pipe fittings of different specifications. Through elastic adjustment and buffer protection, it not only ensures clamping stability and prevents displacement, but also avoids damage to the pipe fittings caused by excessive pressure, thereby improving the processing accuracy and yield of edge material removal.

[0024] 2. In this utility model, rotating the rotating ring drives the threaded adjusting rod to rotate, causing the steel plate to move up and down along the thread, changing the distance between the rubber sheet and the top toothed surface of the L-shaped base. During installation, the distance is reduced to clamp the cutting rope, and during replacement, the distance is increased to loosen it. The electric telescopic rod adjusts the height to align with the cutting position, achieving convenient clamping and quick replacement of the cutting rope. It can be adapted to different specifications of cutting ropes, accurately controls the clamping force, ensures cutting stability, significantly improves replacement efficiency, reduces downtime, and meets the high-efficiency production needs of edge trimming for blow-molded air duct parts. Attached Figure Description

[0025] Figure 1 This is a perspective view of the edge trimming device for blow-molded air duct components proposed in this utility model;

[0026] Figure 2 This is a rear view of the edge trimming device for blow-molded air duct components proposed in this utility model;

[0027] Figure 3 This is a partial structural diagram of the clamping mechanism in the blow-molded air duct edge trimming device proposed in this utility model;

[0028] Figure 4This is a structural exploded view of the damping component in the edge trimming device for blow-molded air duct parts proposed in this utility model;

[0029] Figure 5 This is a structural exploded view of the replacement mechanism in the edge material cutting device for blow-molded air duct parts proposed in this utility model;

[0030] Figure 6 This is a schematic diagram of the internal structure of the emergency power supply compartment in the blow-molded air duct edge trimming device proposed in this utility model.

[0031] Legend:

[0032] 1. Processing table; 2. Fixing plate; 3. Electric telescopic rod; 4. Clamping mechanism; 41. Hydraulic rod; 42. Push plate; 43. Spring; 44. Connecting plate; 45. Rubber ball; 46. Damping assembly; 461. Damping sleeve; 462. Damping rod; 5. Replacement mechanism; 51. L-shaped base; 52. Threaded adjusting rod; 53. Rotating round head; 54. Steel plate; 55. Rubber sheet; 56. Rotating ring; 6. Emergency power compartment; 7. Battery; 8. Charging port; 9. Dust cover; 10. Power indicator light; 11. Cutting rope; 12. Flame retardant plate. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-4 An embodiment of this utility model provides a blow molding duct edge trimming device, including a processing table 1 and a cutting rope 11. A fixing plate 2 is fixedly connected to the rear top of the processing table 1, and electric telescopic rods 3 are fixedly connected to the left and right top sides of the processing table 1. A clamping mechanism 4 is provided on the top of the fixing plate 2 and the front top of the processing table 1. The clamping mechanism 4 is used to clamp the blow molding duct. A replacement mechanism 5 is provided on the top of each of the two electric telescopic rods 3. The replacement mechanism 5 is used to clamp and can quickly replace the cutting rope 11.

[0035] The clamping mechanism 4 includes a hydraulic rod 41, which is fixedly connected to the top front end of the fixed plate 2. A push plate 42 is fixedly connected to the bottom of the hydraulic rod 41. Multiple springs 43 are fixedly connected at equal distances to the bottom of the push plate 42 and the top front side of the processing table 1. Each of the multiple springs 43 has a damping assembly 46 inside. The damping assembly 46 includes multiple damping sleeves 461, which are fixedly connected at equal distances to the bottom of the push plate 42. Multiple springs 43 are respectively sleeved on the outside of the multiple damping sleeves 461. A damping rod 462 is slidably connected inside the multiple damping sleeves 461. The bottom end of the multiple damping rods 462 is fixedly connected to the top of multiple connecting plates 44. A connecting plate 44 is fixedly connected to the adjacent end of each of the multiple springs 43. A rubber ball 45 is fixedly connected to the adjacent side of each of the multiple connecting plates 44.

[0036] Specifically, the clamping mechanism 4 achieves stable clamping of the blow molding duct through the coordinated action of the hydraulic rod 41, springs 43, damping assembly 46, and connecting plate 44. The hydraulic rod 41 is fixed to the top front end of the fixed plate 2, and its bottom is connected to the push plate 42. When the hydraulic rod 41 starts to extend, the push plate 42 moves towards the processing table 1. Multiple springs 43, which are equidistantly distributed at the bottom of the push plate 42 and the top front side of the processing table 1, are compressed during the downward movement of the push plate 42. At the same time, the damping assembly 46 inside the springs 43 starts to work. The damping assembly 46 includes a damping sleeve fixed to the bottom of the push plate 42. The damping sleeve 461 and the damping rod 462 slidably connected inside the damping sleeve 461 are used to reduce the compression speed of the spring 43 when the spring 43 is compressed. This avoids rigid impact on the blow-molded air duct during clamping. The connecting plate 44 connected to one end of the spring 43 moves inward under the compression force of the spring 43. The rubber ball 45 on one side of the connecting plate 44 contacts the surface of the blow-molded air duct and applies pressure. The elastic deformation of the rubber ball 45 makes it conform to the contour of the duct surface. At the same time, the spring... The buffering force provided by spring 43 and damping component 46 ensures that when clamping blow-molded air fittings of different specifications and materials, sufficient clamping force is provided to prevent the fittings from shifting, while avoiding deformation or surface damage due to excessive pressure. After the blow-molded air fitting is placed in the designated position on the processing table 1, the hydraulic rod 41 is activated to extend it. The push plate 42 drives the spring 43, damping component 46, and connecting plate 44 to move downward. The rubber ball 45 gradually contacts and wraps around the fitting. The compressive force of the spring 43 and the buffering effect of the damping component 46 work together to make the rubber ball 45 apply even pressure to the surface of the fitting, completing the process. When the pipe needs to be released, the hydraulic rod 41 retracts, the spring 43 returns to its original shape, pushing the connecting plate 44 to reset, and the rubber ball 45 disengages from the pipe. The hydraulic rod 41 drives the push plate 42, which in turn links the spring 43 and the damping component 46. With the structural design of the connecting plate 44 and the rubber ball 45, an adaptive clamping effect for blow-molded pipes is achieved. This mechanism is compatible with various pipe specifications. Through the elastic adjustment of the spring 43 and the buffer protection of the damping component 46, clamping stability is ensured while effectively avoiding damage to the pipes, thus improving the processing accuracy and yield rate during the edge material removal process.

[0037] Reference Figure 1 , Figure 2 and Figure 5The replacement mechanism 5 includes two L-shaped bases 51 and two threaded adjusting rods 52. The two L-shaped bases 51 are fixedly connected to the top of the two electric telescopic rods 3 respectively. The bottom of each of the two threaded adjusting rods 52 is fixedly connected to a rotating round head 53. The two rotating round heads 53 are rotatably connected to the inside of the two L-shaped bases 51 respectively. The outside of each of the two threaded adjusting rods 52 is threadedly connected to a steel plate 54. The bottom of each of the two steel plates 54 is fixedly connected to a rubber sheet 55. The bottom of each of the two rubber sheets 55 and the top of each of the two L-shaped bases 51 are both designed with a toothed shape. The replacement mechanism 5 also includes two rotating rings 56. The two rotating rings 56 are fixedly connected to the top of the two threaded adjusting rods 52 respectively. The outside of each of the two rotating rings 56 is designed with an anti-slip feature.

[0038] Specifically, the replacement mechanism 5 achieves rapid clamping and replacement of the cutting rope 11 through the coordinated operation of the L-shaped base 51, threaded adjusting rod 52, steel plate 54, rubber sheet 55, and rotating ring 56. Two L-shaped bases 51 are fixed to the top of the electric telescopic rod 3, providing the installation foundation for the entire mechanism. The rotating round head 53 at the bottom of the threaded adjusting rod 52 is rotatably connected inside the L-shaped base 51, allowing the threaded adjusting rod 52 to rotate on the L-shaped base 51 while maintaining a vertical position. The threaded adjusting rod 52 is externally threaded to the steel plate 54. The rubber sheet 55 fixed to the bottom of the steel plate 54 and the top of the L-shaped base 51 both feature a toothed design to enhance the grip on the cutting rope 11. The friction of the cutting rope 11, the rotating ring 56 fixed at the top of the threaded adjusting rod 52, and its external anti-slip design facilitate the operator's application of force for rotation. When the cutting rope 11 needs to be installed, the operator rotates the rotating ring 56, causing the threaded adjusting rod 52 to rotate. Since the threaded adjusting rod 52 is threadedly engaged with the steel plate 54, as the threaded adjusting rod 52 rotates, the steel plate 54 moves upward along the threaded adjusting rod 52, increasing the distance between the rubber sheet 55 and the top of the L-shaped base 51. At this time, the cutting rope 11 is placed on the toothed surface at the top of the L-shaped base 51. The rotating ring 56 is rotated in the opposite direction again, and the threaded adjusting rod 52 causes the steel plate 54 to move downward. As the rubber sheet 55 gradually approaches the L-shaped base 51, the rotation stops when the toothed surface of the rubber sheet 55 and the top of the L-shaped base 51 clamps the cutting rope 11. The toothed structure of the rubber sheet 55 and the L-shaped base 51 increases the contact area and friction with the cutting rope 11, ensuring the cutting rope 11 is firmly fixed and preventing displacement during cutting. If the cutting rope 11 is worn and needs to be replaced, the operator only needs to rotate the rotating ring 56 again to move the steel plate 54 upward, causing the rubber sheet 55 to loosen its clamping grip on the cutting rope 11, allowing for quick removal of the old rope and installation of the new rope. The electric telescopic rod 3 can adjust the height of the replacement mechanism 5. After the cutting rope 11 is installed, the electric... The telescopic rod 3 extends or retracts, driving the replacement mechanism 5 to move to a suitable position, so that the cutting rope 11 is aligned with the edge material of the blow-molded air duct for cutting. By rotating the rotating ring 56, the threaded adjusting rod 52 is driven. In conjunction with the up-and-down movement of the steel plate 54 and the rubber sheet 55, as well as the design of the L-shaped base 51 and the toothed structure, the cutting rope 11 can be conveniently clamped and quickly replaced. This mechanism can be adapted to different specifications of cutting rope 11. The clamping force can be precisely controlled by thread adjustment. While ensuring cutting stability, it significantly improves the replacement efficiency of the cutting rope 11, reduces equipment downtime, and meets the high-efficiency production needs of edge material removal for blow-molded air ducts.

[0039] Reference Figure 2 and Figure 6An emergency power supply compartment 6 is fixedly connected to the bottom of the processing table 1. Multiple batteries 7 are fixedly connected to the bottom inner side of the emergency power supply compartment 6. A charging port 8 is provided on the rear side of the emergency power supply compartment 6. A dust cover 9 is rotatably connected to the top outer side of the charging port 8. Multiple power indicator lights 10 are fixedly connected to the bottom rear side of the emergency power supply compartment 6. The multiple power indicator lights 10 are electrically connected to the multiple batteries 7. A flame-retardant plate 12 is provided between the multiple batteries 7. The outer side of the flame-retardant plate 12 is fixedly connected to the four sides of the inner side of the emergency power supply compartment 6.

[0040] Specifically, multiple batteries 7 are installed inside the emergency power compartment 6 fixed at the bottom of the processing table 1 to provide power support for the device in the event of a sudden power outage. A charging port 8 is provided on the rear side of the emergency power compartment 6, and the dust cover 9 on its outer top is opened and closed by a rotating connection. When charging, the dust cover 9 is opened and the charging cable is inserted into the charging port 8 to charge the batteries 7. After charging is completed, the dust cover 9 is closed to prevent dust and foreign objects from entering. Multiple power indicator lights 10 fixed at the bottom rear side of the emergency power compartment 6 are electrically connected to the batteries 7 and display the battery level of the batteries 7 through different colors or the number of lights. In operation, flame-retardant plates 12 are installed between multiple batteries 7, with their outer sides fixed to the inner perimeter of the emergency power compartment 6 to separate each battery 7. When a battery 7 overheats due to a fault, the flame-retardant plates 12 can prevent heat dissipation and avoid a chain reaction. During normal operation, the device is powered by an external power source and simultaneously charges the batteries 7. In the event of a sudden power outage, the batteries 7 automatically switch to power supply mode to maintain the short-term operation of components such as the hydraulic rod 41 and the electric telescopic rod 3, facilitating the operator to complete the processing of blow molding air ducts and preventing damage to ducts or equipment failure due to sudden power outages.

[0041] Working Principle: The blow-molded air duct is placed at the designated position on the front side of the top of the processing table 1. The hydraulic rod 41 in the clamping mechanism 4 is activated. The hydraulic rod 41 is fixed to the front end of the top of the fixing plate 2. When it extends, it drives the push plate 42 at the bottom to move towards the processing table 1. During the downward movement of the push plate 42, the springs 43, which are equidistantly distributed at the bottom of the push plate 42 and the front side of the top of the processing table 1, are compressed. At the same time, the damping component 46 inside the spring 43 starts to operate. The damping sleeve 461 in the damping component 46 is fixed to the bottom of the push plate 42, and the damping rod 462 is slidably connected inside the damping sleeve 461. When the spring 43 is compressed, the damping rod 462 slides inside the damping sleeve 461, using the damping medium to generate resistance, slowing down the compression speed of the spring 43 and avoiding rigid impact on the duct. The elastic force generated by the contraction pushes the connecting plate 44 inward. The rubber ball 45 on one side of the connecting plate 44 contacts the surface of the blow-molded air pipe and applies pressure. The elastic deformation of the rubber ball 45 makes it conform to the contour of the pipe. The buffer force provided by the spring 43 and the damping component 46 ensures that sufficient clamping force is provided to prevent displacement of pipes of different specifications and materials, while avoiding deformation of the pipe due to excessive pressure. When the rubber ball 45 evenly wraps around and presses on the surface of the pipe, stable clamping is completed. If it is necessary to release the pipe, the hydraulic rod 41 retracts, the spring 43 restores its deformation and pushes the connecting plate 44 to reset, and the rubber ball 45 detaches from the pipe. The installation and replacement of the cutting rope 11 are completed by the replacement mechanism 5. The two L-shaped bases 51 are fixed to the top of the electric telescopic rod 3 to provide support for the entire mechanism. When installing the cutting rope 11, the operator rotates the rotating ring 56 at the top of the threaded adjusting rod 52. Because the threaded adjusting rod 52 is threadedly engaged with the steel plate 54, the steel plate 54 moves upward along the threaded adjusting rod 52, increasing the distance between the rubber sheet 55 and the top of the L-shaped base 51. The cutting rope 11 is then placed on the toothed surface at the top of the L-shaped base 51. The rotating ring 56 is rotated in the opposite direction, causing the threaded adjusting rod 52 to move the steel plate 54 downward. The rubber sheet 55 gradually approaches the L-shaped base 51. When the rubber sheet 55 and the toothed surface at the top of the L-shaped base 51 clamp the cutting rope 11, the rotation is stopped. The toothed structure increases the contact area and friction with the cutting rope 11, ensuring its stable fixation. If the cutting rope 11 is worn, it needs to be replaced. The rotating ring 56 is rotated again to move the steel plate 54 upward, and the rubber sheet 55 loosens its clamp. With the old rope in place, a new rope can be quickly removed and installed. After the cutting rope 11 is installed, the electric telescopic rod 3 extends or retracts, driving the replacement mechanism 5 to move to a suitable position, aligning the cutting rope 11 with the edge material of the blow molding duct, ready for cutting. The emergency power compartment 6 at the bottom of the processing table 1 ensures the device operates in the event of a sudden power outage. During normal operation, the device is powered by an external power source, simultaneously charging the battery 7 inside the emergency power compartment 6. During charging, open the dust cover 9, which is rotatably connected to the top of the charging port 8, and insert the charging cable into the charging port 8. After charging is complete, close the dust cover 9 to prevent dust and foreign objects from entering. The power indicator light 10 at the bottom rear of the emergency power compartment 6 is electrically connected to the battery 7, displaying the power status in real time through different colors or the number of lights.A flame-retardant plate 12 is installed between multiple batteries 7, with its outer side fixed to the inner perimeter of the emergency power compartment 6, separating each battery 7. When a battery 7 overheats due to a fault, the flame-retardant plate 12 prevents heat dissipation and avoids a chain reaction. In the event of a sudden power outage, the batteries 7 automatically switch to power supply mode, maintaining the hydraulic rod 41 and the electric telescopic rod 3 for a short period. Operators can use this time to complete the blow molding ductwork being processed, avoiding damage to the ductwork or equipment failure due to a sudden power outage.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for cutting off edge material of blow-molded air duct fittings, comprising a processing table (1) and a cutting rope (11), characterized in that: A fixing plate (2) is fixedly connected to the rear top of the processing table (1). Electric telescopic rods (3) are fixedly connected to the left and right top sides of the processing table (1). A clamping mechanism (4) is provided on the top of the fixing plate (2) and the front top of the processing table (1). The clamping mechanism (4) is used to clamp the blow molding air pipe. A replacement mechanism (5) is provided on the top of each of the two electric telescopic rods (3). The replacement mechanism (5) is used to clamp and can quickly replace the cutting rope (11). The clamping mechanism (4) includes a hydraulic rod (41), which is fixedly connected to the top front end of the fixed plate (2). A push plate (42) is fixedly connected to the bottom of the hydraulic rod (41). Multiple springs (43) are fixedly connected at equal distances to the bottom of the push plate (42) and the top front side of the processing table (1). A damping component (46) is provided inside each of the multiple springs (43). A connecting plate (44) is fixedly connected to one adjacent end of each of the multiple springs (43). A rubber ball (45) is fixedly connected to one adjacent side of each of the multiple connecting plates (44).

2. The edge trimming device for blow-molded air duct components according to claim 1, characterized in that: The replacement mechanism (5) includes two L-shaped bases (51) and two threaded adjusting rods (52). The two L-shaped bases (51) are fixedly connected to the top of the two electric telescopic rods (3). The bottom of the two threaded adjusting rods (52) is fixedly connected to a rotating round head (53). The two rotating round heads (53) are rotatably connected to the inside of the two L-shaped bases (51). The outside of the two threaded adjusting rods (52) is threadedly connected to a steel plate (54). The bottom of the two steel plates (54) is fixedly connected to a rubber sheet (55). The bottom of the two rubber sheets (55) and the top of the two L-shaped bases (51) are both designed with a tooth shape.

3. The edge trimming device for blow-molded air duct components according to claim 1, characterized in that: The damping assembly (46) includes multiple damping sleeves (461), which are fixedly connected at equal intervals to the bottom of the push plate (42). Multiple springs (43) are respectively sleeved on the outside of the multiple damping sleeves (461). A damping rod (462) is slidably connected inside each of the multiple damping sleeves (461). The bottom ends of the multiple damping rods (462) are respectively fixedly connected to the top of the multiple connecting plates (44).

4. The edge trimming device for blow-molded air duct components according to claim 1, characterized in that: The replacement mechanism (5) also includes two rotating rings (56), which are fixedly connected to the top of two threaded adjusting rods (52) respectively. The outer surfaces of the two rotating rings (56) are designed to be non-slip.

5. The edge trimming device for blow-molded air duct components according to claim 1, characterized in that: An emergency power supply compartment (6) is fixedly connected to the bottom of the processing table (1), and multiple batteries (7) are fixedly connected to the bottom inner side of the emergency power supply compartment (6).

6. The edge trimming device for blow-molded air ducts according to claim 5, characterized in that: The emergency power supply compartment (6) is provided with a charging port (8) on the rear side, and a dust cover (9) is rotatably connected to the top of the outer side of the charging port (8).

7. The edge trimming device for blow-molded air duct components according to claim 5, characterized in that: Multiple power indicator lights (10) are fixedly connected to the rear bottom of the emergency power compartment (6), and the multiple power indicator lights (10) are electrically connected to multiple batteries (7).

8. The edge trimming device for blow-molded air ducts according to claim 7, characterized in that: Flame-retardant plates (12) are provided between the multiple batteries (7), and the outer sides of the flame-retardant plates (12) are fixedly connected to the inner sides of the emergency power supply compartment (6).

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