Blow molding device for PE film processing and blow molding process thereof

Abstract

The invention relates to the technical field of blow molding devices, in particular to a blow molding device for PE (polyethylene) film processing and a blow molding process thereof.The blow molding device comprises a mounting shell, a raw material pipe, a blow molding part and a rectangular shell; the raw material pipe is mounted in the mounting shell and is communicated with the blow molding part; the rectangular shell is mounted on the mounting shell; the clamping mechanism is mounted on the mounting shell and is used for clamping a blow-molded PE film; the blowing mechanism is mounted at the bottom of the rectangular shell; the pressing mechanism is mounted on the rectangular shell and is used for pressing the blow-molded PE film; the air blowing mechanism comprises a pulling assembly, an air blowing assembly, a connecting assembly and an air blowing shell. The blowing shell is installed at the bottom of the rectangular shell, and the two ends of the pulling assembly are connected with the blowing shell and the moving end of the clamping mechanism correspondingly. The closer the blowing head above the rotating wheel is to the outer side of the PE film, then external cold air is blown to the outer side of the PE film along the air conveying pump, the round pipe and the blowing head, and therefore the PE films of different sizes are cooled.

Description

Technical Field

[0001] This invention relates to the field of blow molding equipment technology, and specifically to a blow molding device for PE film processing and its blow molding process. Background Technology

[0002] A blow molding device for PE film processing is a plastic processing machine that sprays out liquid plastic and uses air force to blow the plastic body into a mold cavity of a certain shape to form a product.

[0003] Chinese patent CN217123960U discloses a blow molding die head for a film blow molding machine, including an air pipe and a base. A connecting sleeve is detachably sleeved on the discharge pipe of the base. Several rotatably connected support plates are arranged at equal intervals on the outside of the connecting sleeve. Each support plate has a common rotatably connected fixing ring at its upper end. The fixing ring is fixed in position relative to the connecting sleeve by the several support plates. The above-mentioned prior art can flexibly match blow molded parts with different exhaust volumes of the air pipe, and facilitates the stable guidance and limiting shaping of blow molded parts by the blow molding machine for traction and winding, thereby improving the processing effect of film blow molding.

[0004] During the blow molding process, the outer temperature of the PE film is relatively high. Since the blow molding device often blows the PE film from the inside, it may cause uneven temperature between the inside and outside of the PE film, affecting the quality of the final PE film product. Summary of the Invention

[0005] The purpose of this invention is to address the problems existing in the background art by proposing a blow molding device and blow molding process for PE film processing.

[0006] The technical solution of the present invention: A blow molding apparatus for PE film processing, comprising a mounting shell, a raw material pipe, a blow molding component, and a rectangular shell; the raw material pipe is installed inside the mounting shell and communicates with the blow molding component; the rectangular shell is installed on the mounting shell; further comprising: A clamping mechanism, which is mounted on the mounting housing and is used to clamp the blown PE film; An air blowing mechanism is installed at the bottom of a rectangular shell; A pressing mechanism, mounted on a rectangular shell, is used to press the blown PE film. The blowing mechanism includes a pulling component, a blowing component, a connecting component, and a blowing shell; the blowing shell is installed at the bottom of a rectangular shell, and the two ends of the pulling component are respectively connected to the blowing shell and the moving end of the clamping mechanism; the connecting component is installed on the blowing shell, and the blowing component is installed on the connecting component and blows towards the PE film; the pulling component retracts as the moving end of the clamping mechanism retracts, pulling the blowing component on the connecting component closer to or away from the PE film, and the blowing component blows towards the PE film.

[0007] Preferably, the pulling assembly includes a pull rope and a limiting wheel; The two ends of the pull rope are connected to the moving end of the clamping mechanism and the air blowing shell, respectively; the limit wheel is installed on the outside of the air blowing shell and is connected to the pull rope.

[0008] Preferably, the connecting assembly includes an elastic element, a support block, and a rotating wheel; The two ends of the elastic element are connected to the air-blowing shell and the support block, respectively; the bottom of the support block is connected to the rotating wheel; the rotating wheel is sleeved on the surface of the pull rope, and the pull rope moves with the clamping mechanism to pull the rotating wheel closer to or away from the PE film.

[0009] Preferably, the air blowing assembly includes an air blowing head, a telescopic tube, a circular tube, and an air pump; The air blowing head is installed inside the support block, and the two ends of the telescopic tube are connected to the round tube and the air blowing head respectively; the round tube is connected to the air pump; the air blowing head moves closer to or further away from the PE film as the component is pulled.

[0010] Preferably, the clamping mechanism includes a first movable plate, a second movable plate, a second motor, a rotating roller, and two drive units; Both drive units are installed inside a rectangular shell. Movable plate one and movable plate two are respectively installed on the two drive units. Movable plate one is connected to the pulling assembly. Two motors are respectively installed on movable plate two, and their output shafts are connected to the rotating roller.

[0011] Preferably, the drive unit includes a motor, a two-way lead screw, a guide rod, and a moving plate. Motor 1 is installed outside the rectangular shell, and its output shaft is connected to a two-way lead screw. The guide rod is installed inside the rectangular shell. Moving plate 1 and moving plate 2 are respectively threaded to the two-way lead screw and movably connected to the guide rod. Motor 1 drives the two-way lead screw to rotate, thereby moving moving plate 1 and moving plate 2.

[0012] Preferably, the pressing mechanism includes a second pull rope, a support plate, a cylinder, a coil spring, a connecting shaft, a pressing frame, and a second limiting wheel; The two ends of the second pull rope are connected to the pressing frame and the second moving plate, respectively; the second limiting wheel is installed on the rectangular shell, and the second pull rope is installed on the second limiting wheel; the support plate is installed on the rectangular shell, the cylinder is installed on the support plate, and the coil spring is installed inside the cylinder; the connecting shaft is installed at the center of the coil spring, and the connecting shaft is connected to the pressing frame; the second moving plate moves and pulls the second pull rope, which causes the tilt angle of the pressing frame to change.

[0013] Preferably, the pressing mechanism further includes a pressing roller, a linkage rod, and a limiting frame; The linkage rod is installed on the second movable plate, the limit frame is installed on the linkage rod, and the pressure roller is rotatably connected to the pressure frame; the limit frame is sleeved on the pressure roller and moves on the pressure roller along with the second movable plate.

[0014] This invention further provides a blow molding process for PE film processing, employing the aforementioned blow molding apparatus for PE film processing, and includes the following specific steps: S1: The blow molding component blows the PE film upwards. The clamping mechanism moves its moving end to clamp and limit the PE film according to the thickness of the PE film, and contacts the outer surface of the PE film through its own rotating end. S2: When the moving end of the clamping mechanism moves, the pulling component contracts, thereby driving the roller to contract towards the center of the air-blowing shell through the elasticity of the elastic element. The distance between the moving end of the connecting component and the outside of the PE film depends on the thickness of the PE film. S3: When the roller moves, it drives the air outlet of the air blowing assembly to move closer to the PE film, thereby assisting in cooling the outside of the PE film. S4: The PE film is then pressed by the pressing component and then output to complete the PE film production.

[0015] Compared with the prior art, the above-mentioned technical solution of the present invention has the following beneficial technical effects: liquid plastic is injected from the raw material pipe and then blown upward through the blow molding component. At this time, the PE film located above the blow molding component is cylindrical. At this time, the motor is started to drive the bidirectional screw to rotate, thereby driving the moving plate 1 and the moving plate 2 to move along the axis of the guide rod through the bidirectional screw, thereby contacting the outer surface of the PE film through the rotating roller. Then, the motor is started to drive the rotating roller to rotate, providing auxiliary support to the outer side of the PE film, thereby adjusting the size of the external auxiliary clamp according to the size of the PE film. The smaller the PE film, the closer the moving plate moves towards it; conversely, the larger the PE film, the shorter the moving plate moves. Then, the moving plate pulls the pull rope, which in turn pulls the rotating wheel towards the center of the air-blowing shell. The greater the range of movement of the moving plate, the smaller the PE film, and therefore the tighter the pull rope is pulled. This causes the air-blowing head above the rotating wheel to get closer to the outside of the PE film. Subsequently, external cold air is blown along the air pump, the round pipe, and the air-blowing head towards the outside of the PE film, thereby cooling PE films of different sizes. When the second moving plate moves, it drives the limiting frame on the linkage rod to move along the pressure roller, thereby limiting the PE film squeezed by the two pressure rollers through the limiting frame, thus preventing the PE film squeezed into sheets by the pressure rollers from shifting on the pressure rollers, and thus being able to limit PE films of different sizes. When the second moving plate moves, the second pull rope pulls the pressing frame closer to or away from the center of the rectangular shell, thereby guiding PE films of different sizes through the pressing frame, further improving the stability of PE film processing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the rectangular shell structure proposed in this invention; Figure 3This is a schematic diagram of the pressing frame proposed in this invention; Figure 4 This is a schematic diagram of the structure of the movable plate II proposed in this invention; Figure 5 This is a schematic diagram of the support block proposed in this invention; Reference numerals: 1. Mounting shell; 2. Raw material pipe; 3. Blow molding component; 4. Rectangular shell; 5. Motor 1; 6. Two-way lead screw; 7. Guide rod; 8. Moving plate 1; 9. Motor 2; 10. Rotating roller; 11. Moving plate 2; 12. Pull rope 1; 13. Limiting wheel 1; 14. Limiting wheel 2; 15. Air blowing shell; 16. Elastic element; 17. Support block; 18. Air blowing head; 19. Telescopic tube; 20. Round tube; 21. Rotary wheel; 22. Air pump; 23. Pull rope 2; 24. Support plate; 25. Cylinder; 26. Coil spring; 27. Connecting shaft; 28. Pressing frame; 29. ​​Pressing roller; 30. Linkage rod; 31. Limiting frame. Detailed Implementation

[0017] Example 1, as Figure 1-5 As shown, the present invention proposes a blow molding device for PE film processing, including a clamping mechanism, an air blowing mechanism, a pressing mechanism, a mounting shell 1, a raw material pipe 2, a blow molding component 3, and a rectangular shell 4; the raw material pipe 2 is installed inside the mounting shell 1 and is connected to the blow molding component 3; the rectangular shell 4 is installed on the mounting shell 1. The clamping mechanism is mounted on the mounting housing 1 and is used to clamp the blown PE film; The air blowing mechanism is installed at the bottom of the rectangular shell 4; The pressing mechanism is mounted on the rectangular shell 4 and is used to press the blown PE film; The blowing mechanism includes a pulling component, a blowing component, a connecting component, and a blowing shell 15. The blowing shell 15 is installed at the bottom of the rectangular shell 4. The two ends of the pulling component are respectively connected to the blowing shell 15 and the moving end of the clamping mechanism. The connecting component is installed on the blowing shell 15, and the blowing component is installed on the connecting component and blows towards the PE film. As the moving end of the clamping mechanism retracts, the pulling component pulls the blowing component on the connecting component closer to or away from the PE film, and the blowing component blows towards the PE film.

[0018] The pulling assembly includes a pull rope 12 and a limit wheel 13; The two ends of the pull rope 12 are respectively connected to the moving end of the clamping mechanism and the air blowing shell 15; the limit wheel 13 is installed on the outside of the air blowing shell 15 and is connected to the pull rope 12. The pull rope 12 is limited by the limit wheel 13. When the moving plate 8 moves, the moving plate 8 pulls the pull rope 12 to move. The pull rope 12 pulls the rotating wheel 21 closer to the center of the air blowing shell 15. The moving distance of the moving plate 8 is adjusted according to the thickness of the PE film.

[0019] The connecting assembly includes an elastic element 16, a support block 17, and a rotating wheel 21; The two ends of the elastic element 16 are respectively connected to the air blowing shell 15 and the support block 17; the bottom of the support block 17 is connected to the rotating wheel 21; the rotating wheel 21 is sleeved on the surface of the pull rope 12, and the pull rope 12 pulls the rotating wheel 21 closer to or away from the PE film as the clamping mechanism moves. When the pull rope 12 is pulled, it moves the pull wheel 21, which in turn moves the support block 17. The support block 17 then moves the air blower 18, adjusting the distance between the air blower 18 and the PE film.

[0020] The air blowing assembly includes an air blowing head 18, a telescopic tube 19, a round tube 20, and an air pump 22; The air blowing head 18 is installed inside the support block 17, and the two ends of the telescopic tube 19 are respectively connected to the round tube 20 and the air blowing head 18; the round tube 20 is connected to the air pump 22; the air blowing head 18 moves closer to or further away from the PE film as the component is pulled. In use, connect the input end of the air pump 22 to the cooling airflow input pipe, then start the air pump 22 to deliver the cooling airflow to the round pipe 20, and then blow it onto the PE film surface through the telescopic pipe 19 and the air blowing head 18 to assist in cooling it.

[0021] Example 2, as Figures 1-4 As shown, the present invention proposes a blow molding device and blow molding process for PE film processing. Compared with Embodiment 1, the clamping mechanism of this embodiment includes a moving plate 1 8, a moving plate 2 11, a motor 2 9, a rotating roller 10, and two drive units. Both drive units are installed inside the rectangular shell 4. Movable plate 1 8 and movable plate 2 11 are respectively installed on the two drive units. Movable plate 1 8 is connected to the pulling assembly. Two motors 2 9 are respectively installed on movable plate 2 11, and their output shafts are connected to the rotating roller 10. The rotating roller 10 is brought into contact with the outer surface of the PE film by moving the first moving plate 8 and the second moving plate 11. Then, the second motor 9 is started to drive the rotating roller 10 to rotate, thereby limiting the rotation of the rotating roller 10 to PE films of different sizes.

[0022] The drive unit includes a motor 5, a two-way lead screw 6, a guide rod 7, and a moving plate 8; Motor 1 5 is installed outside the rectangular shell 4, and its output shaft is connected to the double-acting screw 6. The guide rod 7 is installed inside the rectangular shell 4. The movable plate 1 8 and the movable plate 2 11 are respectively threaded to the double-acting screw 6 and movably connected to the guide rod 7. Motor 1 5 drives the double-acting screw 6 to rotate, thereby moving the movable plate 1 8 and the movable plate 2 11. The guide rod 7 positions and guides the first movable plate 8 and the second movable plate 11, preventing the rotating bidirectional lead screw 6 from causing the first movable plate 8 and the second movable plate 11 to deviate during movement.

[0023] Example 3, as Figures 1-4 As shown, the blow molding device and blow molding process for PE film processing proposed in this invention, compared with Embodiment 2, the pressing mechanism of this embodiment includes a second pull rope 23, a support plate 24, a cylinder 25, a coil spring 26, a connecting shaft 27, a pressing frame 28 and a second limiting wheel 14; The two ends of the pull rope 23 are connected to the pressing frame 28 and the moving plate 21 respectively; the limiting wheel 24 is installed on the rectangular shell 4, and the pull rope 23 is installed on the limiting wheel 24; the support plate 24 is installed on the rectangular shell 4, the cylinder 25 is installed on the support plate 24, and the coil spring 26 is installed inside the cylinder 25; the connecting shaft 27 is installed at the center of the coil spring 26, and the connecting shaft 27 is connected to the pressing frame 28; the moving plate 21 moves and pulls the pull rope 23, which causes the tilt angle of the pressing frame 28 to change. The elasticity of the connecting shaft 27 allows the pressing frame 28 to be supported by the connecting shaft 27. Then, the moving plate 211 pulls the rope 23, and the rope 23 pulls the pressing frame 28 to move, thereby adjusting the tilt angle of the pressing frame 28.

[0024] The pressing mechanism also includes a pressing roller 29, a linkage rod 30, and a limiting frame 31; Linkage rod 30 is installed on movable plate 21, limit frame 31 is installed on linkage rod 30, and pressing roller 29 is rotatably connected to pressing frame 28; limit frame 31 is sleeved on pressing roller 29 and moves on pressing roller 29 with movable plate 21. Two pressing frames 28 form a human-shaped frame, and the cylindrical PE film enters between the two pressing rollers 29, thereby pressing the PE film into a sheet by the pressing rollers 29.

[0025] Example 4, as Figures 1-5 As shown, the present invention provides a blow molding process for PE film processing, which uses the blow molding apparatus for PE film processing of Embodiment 1, and includes the following specific steps: S1: The blow molding component 3 blows the PE film upwards. The clamping mechanism moves its moving end to clamp and limit the PE film according to the thickness of the PE film, and contacts the outer surface of the PE film through its own rotating end. S2: When the moving end of the clamping mechanism moves, the pulling component retracts, thereby driving the rotating wheel 21 to retract towards the center of the blowing shell 15 through the elasticity of the elastic element 16. The distance between the moving end of the connecting component and the outside of the PE film is determined according to the thickness of the PE film. S3: When the rotating wheel 21 moves, it drives the air outlet of the air blowing assembly to move closer to the PE film, thereby assisting in cooling the outside of the PE film. S4: The PE film is then pressed by the pressing component and then output to complete the PE film production.

[0026] In summary, in this invention, soft plastic is fed into the blow molding component 3 through the raw material pipe 2, and then output upward in a cylindrical shape through the blow molding component 3. At the same time, the blow molding component 3 blows air from inside the PE film, thereby blowing the PE film upward. Then, the motor 5 is started to drive the bidirectional lead screw 6 to rotate. The rotation of the bidirectional lead screw 6 drives the moving plate 8 and the moving plate 11 to move along the axis of the guide rod 7, thereby making the rotating roller 10 contact the outer surface of the PE film. Then, the motor 9 is started to drive the rotating roller 10 to rotate, thereby providing auxiliary support for the PE film and assisting in upward transportation. When the moving plate 8 moves, the pull rope 12 is pulled and limited by the limiting wheel 13, causing the pull rope 12 inside the air blowing shell 15 to retract and pull the rotating wheel 21 to move towards the center of the air blowing shell 15. This makes the rotating wheel 21 closer to the outside of the PE film. The larger the PE film, the shorter the distance the rotating wheel 21 moves. Then, the air pump 22 is started to input the cooling airflow into the round pipe 20, and then into the telescopic pipe 19 and the air blowing head 18 through the round pipe 20. Then, the air is blown onto the PE film through the air blowing head 18 to cool and lower the temperature of the outside of the PE film.

[0027] Next, the PE film passes between the two pressure rollers 29, and the movement of the pressure rollers 29 drives the limiting frame 31 at the top of the linkage rod 30 to move along the pressure rollers 29. Then the limiting frame 31 limits the PE films of different sizes. Next, the movable plate 211 pulls the pull rope 23 to pull the pressing frame 28, and through the elasticity of the connecting shaft 27, the pressing frame 28 is pulled, thereby changing the rotation of the pressing frame 28, so that the cylindrical PE film is limited by the pressing frame 28 at different angles. The PE film, which is then pressed into a sheet by the pressing roller 29, is conveyed out, thus completing the manufacturing of the PE film.

[0028] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A blow molding apparatus for processing PE film, comprising a mounting shell (1), a raw material pipe (2), a blow molding component (3), and a rectangular shell (4); the raw material pipe (2) is installed inside the mounting shell (1) and communicates with the blow molding component (3); the rectangular shell (4) is installed on the mounting shell (1); characterized in that, Also includes: A clamping mechanism is mounted on the mounting housing (1) and is used to clamp the blown PE film; An air blowing mechanism is installed at the bottom of a rectangular shell (4); A pressing mechanism, which is mounted on a rectangular shell (4) and is used to press the blown PE film; The blowing mechanism includes a pulling component, a blowing component, a connecting component, and a blowing shell (15); the blowing shell (15) is installed at the bottom of the rectangular shell (4), and the two ends of the pulling component are respectively connected to the blowing shell (15) and the moving end of the clamping mechanism; the connecting component is installed on the blowing shell (15), and the blowing component is installed on the connecting component and blows towards the PE film; As the clamping mechanism moves, the pulling component retracts, pulling the air blowing component on the connecting component closer to or away from the PE film, and the air blowing component blows towards the PE film.

2. The blow molding apparatus for PE film processing according to claim 1, characterized in that, The pulling assembly includes a pull rope (12) and a limit wheel (13). The two ends of the pull rope (12) are connected to the moving end of the clamping mechanism and the air blowing shell (15) respectively; the limit wheel (13) is installed on the outside of the air blowing shell (15) and connected to the pull rope (12).

3. The blow molding apparatus for PE film processing according to claim 1, characterized in that, The connecting components include an elastic element (16), a support block (17), and a rotating wheel (21); The two ends of the elastic element (16) are connected to the air blowing shell (15) and the support block (17) respectively; the bottom of the support block (17) is connected to the rotating wheel (21); the rotating wheel (21) is sleeved on the surface of the pull rope (12), and the pull rope (12) pulls the rotating wheel (21) closer to or away from the PE film as the clamping mechanism moves.

4. The blow molding apparatus for PE film processing according to claim 3, characterized in that, The air blowing assembly includes an air blowing head (18), a telescopic tube (19), a round tube (20), and an air pump (22); The air blowing head (18) is installed inside the support block (17), and the two ends of the telescopic tube (19) are connected to the round tube (20) and the air blowing head (18) respectively; the air pump (22) is connected to the round tube (20); the air blowing head (18) moves closer to or further away from the PE film as the component is pulled.

5. The blow molding apparatus for PE film processing according to claim 1, characterized in that, The clamping mechanism includes a first movable plate (8), a second movable plate (11), a second motor (9), a rotating roller (10), and two drive units; Both drive units are installed inside the rectangular shell (4). Movable plate one (8) and movable plate two (11) are installed on the two drive units respectively. Movable plate one (8) is connected to the pulling assembly. Two motors two (9) are installed on movable plate two (11) respectively, and their output shafts are connected to the rotating roller (10).

6. The blow molding apparatus for PE film processing according to claim 5, characterized in that, The drive unit includes a motor (5), a two-way lead screw (6), a guide rod (7), and a moving plate (8); Motor 1 (5) is installed outside the rectangular shell (4), and its output shaft is connected to the double-acting screw (6). The guide rod (7) is installed inside the rectangular shell (4). The movable plate 1 (8) and the movable plate 2 (11) are respectively threaded to the double-acting screw (6) and movably connected to the guide rod (7). Motor 1 (5) drives the double-acting screw (6) to rotate, thereby moving the movable plate 1 (8) and the movable plate 2 (11).

7. The blow molding apparatus for PE film processing according to claim 6, characterized in that, The pressing mechanism includes a second pull rope (23), a support plate (24), a cylinder (25), a coil spring (26), a connecting shaft (27), a pressing frame (28), and a second limiting wheel (14). The two ends of the second pull rope (23) are connected to the pressing frame (28) and the second moving plate (11) respectively; the second limiting wheel (14) is installed on the rectangular shell (4), and the second pull rope (23) is installed on the second limiting wheel (14); the support plate (24) is installed on the rectangular shell (4), the cylinder (25) is installed on the support plate (24), and the coil spring (26) is installed inside the cylinder (25); the connecting shaft (27) is installed at the center of the coil spring (26), and the connecting shaft (27) is connected to the pressing frame (28); the second moving plate (11) moves and pulls the second pull rope (23), which drives the tilt angle of the pressing frame (28) to change.

8. The blow molding apparatus for PE film processing according to claim 6, characterized in that, The pressing mechanism also includes a pressing roller (29), a linkage rod (30), and a limit frame (31). The linkage rod (30) is installed on the moving plate two (11), the limit frame (31) is installed on the linkage rod (30), and the pressing roller (29) is rotatably connected to the pressing frame (28); the limit frame (31) is sleeved on the pressing roller (29) and moves on the pressing roller (29) with the moving plate two (11).

9. A blow molding process for PE film processing, employing the blow molding apparatus for PE film processing as described in claim 3, characterized in that, The specific steps include the following: S1: The blow molding component (3) blows the PE film upwards. The clamping mechanism moves its moving end to clamp and limit the PE film according to the thickness of the PE film, and contacts the outer surface of the PE film through its own rotating end. S2: When the moving end of the clamping mechanism moves, the pulling component contracts, thereby driving the rotating wheel (21) to contract towards the center of the blowing shell (15) through the elasticity of the elastic element (16). The distance between the moving end of the connecting component and the outside of the PE film is determined according to the thickness of the PE film. S3: When the rotating wheel (21) moves, it drives the air outlet of the blowing assembly to move closer to the PE film, thereby providing auxiliary cooling to the outside of the PE film; S4: The PE film is then pressed by the pressing component and then output to complete the PE film production.

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