Film blowing machine for plastic bag production

Abstract

The utility model discloses a film blowing machine for producing plastic bags, which is characterized in that a feeding part is fixedly arranged on one side of the top of a melting part, a blow molding part is fixedly arranged on the other side of the top of the melting part, a foam stabilizing frame is fixedly arranged at the upper end of the blow molding part, an air ring is fixedly arranged on the top of the foam stabilizing frame, and two connecting rods are transversely and fixedly arranged at the upper end of the foam stabilizing frame; a bubble pressing assembly is fixedly arranged between the two connecting rods, supporting rods are vertically and fixedly arranged on one sides of the tops of the two connecting rods, and a guide roller is fixedly connected between the tops of the two supporting rods; the servo motor is started to conveniently drive the threaded rod to rotate, so that the moving block drives the moving plate to move up and down on the foam stabilizing frame, and the film collecting roller on the moving plate moves up and down at the side end of the foam stabilizing frame, so that the height of the film collecting mechanism on the foam stabilizing frame is conveniently adjusted; and the height of the film collecting mechanism can be conveniently adjusted to adapt to films with different lengths, so that the application range of the film collecting mechanism is expanded.

Description

Technical Field

[0001] This utility model relates to stretch forming, such as stretching through a mold; and in particular to a blown film machine for producing plastic bags. Background Technology

[0002] Plastic bags are manufactured using blown film extrusion machines, which heat and melt plastic particles before blowing them into a thin film. The machine heats the raw material to a molten state and extrudes it through an extrusion mechanism. The film bubble is then blown out by the extrusion mechanism, stretched and cooled in a traction mechanism to produce the film, which is finally wound up by a winding mechanism. Currently, most blown film extrusion machines for plastic bag production directly fix the winding mechanism to a bubble holder, resulting in a fixed winding height. This makes it inconvenient to adjust the height of the winding mechanism to accommodate films of varying lengths, thus limiting its application. Furthermore, it hinders the replacement of the winding rollers within the winding mechanism. Therefore, a blown film extrusion machine for plastic bag production is needed to address these issues. Utility Model Content

[0003] The purpose of this invention is to solve the problem in the prior art that it is inconvenient to adjust the height of the film receiving mechanism to adapt to films of different lengths, and thus proposes a blown film machine for plastic bag production.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a blown film machine for producing plastic bags, comprising a melting section, a feeding section fixedly disposed on one side of the top of the melting section, a blown film section fixedly disposed on the other side of the top of the melting section, a bubble stabilizing frame fixedly disposed at the upper end of the blown film section, an air ring fixedly disposed at the top of the bubble stabilizing frame, a cooling device fixedly disposed on one side of the air ring, and the cooling device fixedly disposed on the side end of the bubble stabilizing frame, two connecting rods fixedly disposed laterally at the upper end of the bubble stabilizing frame, a bubble pressing component fixedly disposed between the two connecting rods, and the bubble pressing component being located above the air ring, a support rod fixedly disposed vertically on one side of the top of each of the two connecting rods, a guide roller fixedly connected between the tops of the two support rods, and the guide roller being located above the side end of the bubble stabilizing frame.

[0005] Furthermore, a fixing block is fixedly installed on the bottom side of the melting section and the top side of the bubble stabilizing frame, and the two fixing blocks are aligned vertically. A threaded rod is vertically rotatably connected between the two fixing blocks. A servo motor is fixedly installed at one end of the threaded rod, and the servo motor is located outside the bottom fixing block. A moving block is threaded on the surface of the threaded rod, and a moving plate is fixedly installed on the outer surface of the moving block.

[0006] Furthermore, sliders are fixedly installed on both sides of the inner end of the moving plate, and mounting plates are fixedly installed on both ends of the bottom of one side of the melting part and both ends of the top of the side of the bubble stabilizing frame. A sliding rod is vertically fixed between the two sets of mounting plates, and the two sliders are slidably mounted on the two sliding rods respectively.

[0007] Furthermore, a first groove is formed in the center end face of the moving plate, and a first bidirectional screw is rotatably connected inside the first groove. A first motor is fixedly installed at one end of the first bidirectional screw, and the first motor is located outside the moving plate. Both ends of the first bidirectional screw are threaded with threaded plates, and clamping plates are fixedly installed at the outer ends of the two threaded plates. Circular holes are formed inside the outer ends of the two clamping plates, and a film take-up roller is rotatably connected between the two circular holes.

[0008] Furthermore, the bubble pressing assembly includes a second groove laterally opened inside the two connecting rods, and a second bidirectional screw is laterally rotatably connected inside each of the two second grooves. A second motor is fixedly installed at one end of each of the two second bidirectional screws, and the two second motors are respectively located outside the two connecting rods. Threaded blocks are threaded at both ends of the two second bidirectional screws, and a bubble pressing roller is longitudinally fixedly connected between the two sets of threaded blocks.

[0009] The beneficial effects of this utility model are as follows: By starting the servo motor, the threaded rod can be easily rotated, causing the moving block to move the moving plate up and down on the bubble stabilizer. This allows the film take-up roller on the moving plate to move up and down on the side of the bubble stabilizer, thus facilitating the adjustment of the height of the film take-up mechanism on the bubble stabilizer. This, in turn, allows the height of the film take-up mechanism to be adjusted to accommodate films of different lengths, thereby expanding the application range of the film take-up mechanism. By starting the first motor, the first bidirectional screw can be easily rotated, causing the two threaded plates to move closer to or further away from the two clamping plates. This allows the two round holes on the two clamping plates to move closer to or further away from each other, thus facilitating the replacement of the length of the film take-up roller inside the film take-up mechanism. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the overall side view structure of this utility model;

[0012] Figure 3 This is a schematic diagram of the structure of the movable plate in this utility model;

[0013] Figure 4 This is a schematic diagram of the structure of the medium-pressure bubble roller of this utility model.

[0014] In the diagram: 1 Melting section, 2 Feeding section, 3 Blow molding section, 4 Bubble stabilizer, 5 Air ring, 6 Cooling equipment, 7 Connecting rod, 8 Support rod, 9 Guide roller, 10 Fixing block, 11 Threaded rod, 12 Servo motor, 13 Moving block, 14 Moving plate, 15 Slider, 16 Mounting plate, 17 Slide bar, 18 First groove, 19 First bidirectional screw, 20 First motor, 21 Threaded plate, 22 Clamping plate, 23 Round hole, 24 Taking-up roller, 25 Second groove, 26 Second bidirectional screw, 27 Second motor, 28 Threaded block, 29 Bubble pressing roller. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Reference Figures 1 to 4 This embodiment provides a blown film machine for plastic bag production, including a melting section 1, a feeding section 2 fixedly disposed on one side of the top of the melting section 1, a blown film section 3 fixedly disposed on the other side of the top of the melting section 1, a bubble stabilizing frame 4 fixedly disposed on the upper end of the blown film section 3, an air ring 5 fixedly disposed on the top of the bubble stabilizing frame 4, a cooling device 6 fixedly disposed on one side of the air ring 5, and the cooling device 6 fixedly disposed on the side end of the bubble stabilizing frame 4, two connecting rods 7 horizontally fixedly disposed on the upper end of the bubble stabilizing frame 4, a bubble pressing component fixedly disposed between the two connecting rods 7, and the bubble pressing component is located above the air ring 5, a support rod 8 vertically fixedly disposed on one side of the top of each of the two connecting rods 7, a guide roller 9 fixedly connected between the tops of the two support rods 8, and the guide roller 9 is located above the side end of the bubble stabilizing frame 4; preferably, by setting The device includes a melting section 1 for melting plastic granules, a feeding section 2 for feeding plastic raw materials into the melting section 1, a blow molding section 3 for blow molding the molten plastic granules, a bubble stabilizing frame 4 for protecting the blow-molded film, an air ring 5 for cooling the blow-molded film, a cooling device 6 for introducing the generated cold air into the air ring 5, a connecting rod 7 for mounting a bubble-pressing component on the bubble stabilizing frame 4, a bubble-pressing component for pressing the cooled film, and a support rod 8 for mounting a guide roller 9 on the upper side of the bubble stabilizing frame 4, which guides the subsequent movement of the film and prevents the film from shifting.

[0017] Furthermore, a fixing block 10 is fixedly installed on the bottom side of the melting section 1 and the top side of the bubble stabilizing frame 4, and the two fixing blocks 10 are aligned vertically. A threaded rod 11 is vertically rotatably connected between the two fixing blocks 10. A servo motor 12 is fixedly installed at one end of the threaded rod 11, and the servo motor 12 is located outside the bottom fixing block 10. A moving block 13 is threaded on the surface of the threaded rod 11, and a moving plate 14 is fixedly installed on the outer surface of the moving block 13. Preferably, the fixing blocks 10 facilitate the vertical installation of the threaded rod 11 on the side of the melting section 1 and the bubble stabilizing frame 4, facilitate the driving of the moving block 13 to move up and down, and facilitate the driving of the moving block 13 to move up and down. The movable threaded rod 11 rotates between two fixed blocks 10. The movable block 13 facilitates the up-and-down movement of the movable plate 14 on the side of the melting section 1 and the bubble stabilizer 4. The movable plate 14 also facilitates the up-and-down movement of the winding assembly. The servo motor 12 is activated to facilitate the rotation of the threaded rod 11 between the two fixed blocks 10. The rotation of the threaded rod 11 facilitates the up-and-down movement of the movable block 13 between the two fixed blocks 10. The up-and-down movement of the movable block 13 facilitates the up-and-down movement of the movable plate 14 between the two fixed blocks 10, thereby facilitating the up-and-down movement of the winding assembly on the movable plate 14 and thus facilitating the adjustment of the height of the winding assembly on the movable plate 14.

[0018] Furthermore, sliders 15 are fixedly installed on both sides of the inner end of the moving plate 14, and mounting plates 16 are fixedly installed on both ends of the bottom of one side of the melting part 1 and both ends of the top of the side of the bubble stabilizing frame 4. A sliding rod 17 is vertically fixed between the two sets of mounting plates 16, and the two sliders 15 are slidably mounted on the two sliding rods 17 respectively. Preferably, the sliders 15 are provided to improve the moving stability of the moving plate 14, and the mounting plates 16 are provided to facilitate the vertical installation of two sliding rods 17 on the sides of the melting part 1 and the bubble stabilizing frame 4. The sliding rods 17 are provided to facilitate the up-and-down movement of the sliders 15 between the two mounting plates 16. The up-and-down movement of the moving plate 14 facilitates the up-and-down movement of the two sliders 15 on the two sliding rods 17, thereby improving the stability of the up-and-down movement of the moving plate 14.

[0019] Furthermore, a first groove 18 is formed in the center end face of the movable plate 14. A first bidirectional screw 19 is rotatably connected inside the first groove 18. A first motor 20 is fixedly installed at one end of the first bidirectional screw 19, and the first motor 20 is located outside the movable plate 14. Both ends of the first bidirectional screw 19 are threaded with threaded plates 21. Clamping plates 22 are fixedly installed at the outer ends of the two threaded plates 21. Circular holes 23 are formed inside the outer ends of the two clamping plates 22. A film take-up roller 24 is rotatably connected between the two circular holes 23. Preferably, the first groove 18 facilitates the placement of the first bidirectional screw 19 in the center end face of the movable plate 14, the first bidirectional screw 19 facilitates the placement of the threaded plates 21 in the first groove 18, and the first motor 20 facilitates the driving of the first bidirectional screw 19 to rotate in the center end face of the movable plate 14. The plate 21 has clamping plates 22 on both sides of the outer end of the movable plate 14. The clamping plates 22 facilitate clamping the take-up roller 24 at the outer end of the movable plate 14. The round holes 23 facilitate the fixed installation of the take-up roller 24 between the two clamping plates 22. The take-up roller 24 facilitates the winding of the film. The first motor 20 is started to drive the first bidirectional screw 19 to rotate in the first groove 18. The rotation of the first bidirectional screw 19 facilitates the movement of the two threaded plates 21 closer or further away in the first groove 18. The movement of the two threaded plates 21 closer or further away facilitates the movement of the two clamping plates 22 closer or further away on the outer end of the movable plate 14. The movement of the two clamping plates 22 closer or further away facilitates the movement of the two round holes 23 closer or further away. This facilitates the fixed installation of take-up rollers 24 of different lengths on the outer end of the movable plate 14, thereby facilitating the winding of films of different lengths.

[0020] Furthermore, the bubble-pressing assembly includes a second groove 25 laterally formed inside the two connecting rods 7. A second bidirectional screw 26 is laterally rotatably connected inside each of the two second grooves 25. A second motor 27 is fixedly mounted at one end of each of the two second bidirectional screws 26, and the two second motors 27 are respectively located outside the two connecting rods 7. Threaded blocks 28 are threaded onto both ends of each of the two second bidirectional screws 26. A bubble-pressing roller 29 is longitudinally fixedly connected between the two sets of threaded blocks 28. Preferably, the second grooves 25 facilitate the placement of the second bidirectional screws 26 inside the connecting rods 7, facilitate the placement of the threaded blocks 28 within the second grooves 25, and facilitate the placement of the second motors 27. 7 facilitates the rotation of the second bidirectional screw 26 inside the connecting rod 7. The threaded block 28 facilitates the placement of the bubble-pressing roller 29 outside the connecting rod 7. The bubble-pressing roller 29 facilitates the pressing of bubbles into the film. By starting the two second motors 27, the two second bidirectional screws 26 can be rotated within the two second grooves 25. The rotation of the two second bidirectional screws 26 facilitates the movement of the two sets of threaded blocks 28 closer or further apart within the two second grooves 25. The movement of the two sets of threaded blocks 28 closer or further apart facilitates the movement of the two bubble-pressing rollers 29 closer or further apart between the two moving plates 14, thereby facilitating the adjustment of the distance between the two bubble-pressing rollers 29 and thus facilitating the adjustment of the bubble-pressing distance of the film.

[0021] In this invention, during use, plastic raw materials are first poured into the feeding section 2, allowing them to enter the melting section 1 for melting. The melted plastic granules are then blown into a film by the blow molding section 3. After the film is cooled by the air ring 5, two second motors 27 are activated to drive two second bidirectional screws 26 to rotate within two second grooves 25. The rotation of the two second bidirectional screws 26 drives two sets of threaded blocks 28 to move closer or further away within the two second grooves 25. This movement of the threaded blocks 28 drives two bubble-pressing rollers 29 to move closer or further away between two moving plates 14, thus facilitating the adjustment of the distance between the two bubble-pressing rollers 29 and the bubble-pressing distance of the film. The film is then pressed by the bubble-pressing rollers 29 after the two adjusted distances are adjusted. The film is then guided by the guide roller 9. Finally, the servo motor 12 is activated to drive the threaded rod 11 to rotate between two fixed blocks 10. The rotation of the threaded rod 11 drives the moving block 13 to rotate between the two fixed blocks 10. The moving block 13 moves up and down, causing the moving plate 14 to move up and down between the two fixed blocks 10. This facilitates the up and down movement of the take-up roller 24 on the moving plate 14, thereby facilitating the adjustment of the height of the take-up roller 24 on the moving plate 14. This allows the film to be wound up by the take-up roller 24 after the height is adjusted, and also facilitates the adjustment of the height of the take-up mechanism to accommodate films of different lengths. After winding is completed, the first motor 20 is started to drive the first bidirectional screw 19 to rotate in the first groove 18. The rotation of the first bidirectional screw 19 causes the two threaded plates 21 to move closer or further away in the first groove 18. The movement of the two threaded plates 21 causes the two clamping plates 22 to move closer or further away on the outer end of the moving plate 14. The movement of the two clamping plates 22 causes the two round holes 23 to move closer or further away, thereby facilitating the disassembly of the take-up roller 24 after winding, and facilitating the replacement of the length of the take-up roller 24 inside the take-up mechanism.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A film blowing machine for plastic bag production comprising a melt section (1), characterized in that: The top side of the melt part (1) is fixedly provided with an inlet part (2), the other side of the top of the melt part (1) is fixedly provided with a blow molding part (3), the upper end of the blow molding part (3) is fixedly provided with a bubble stabilizing frame (4), the top of the bubble stabilizing frame (4) is fixedly provided with a wind ring (5), one side of the wind ring (5) is fixedly provided with a cooling device (6), and the cooling device (6) is fixedly arranged on the side end of the bubble stabilizing frame (4), the upper end of the bubble stabilizing frame (4) is transversely fixedly provided with two connecting rods (7), a bubble pressing assembly is fixedly arranged between the two connecting rods (7) and located above the wind ring (5), the top side of each of the two connecting rods (7) is vertically fixedly provided with a supporting rod (8), the top of the two supporting rods (8) is fixedly and connectively provided with a guide roller (9) above the side end of the bubble stabilizing frame (4). The bottom side of the melt part (1) and the top side of the side end of the bubble stabilizing frame (4) are fixedly provided with fixed blocks (10), and the two fixed blocks (10) are arranged in alignment, a threaded rod (11) is vertically and rotatably connected between the two fixed blocks (10), one end of the threaded rod (11) is fixedly provided with a servo motor (12), and the servo motor (12) is located outside the fixed block (10) at the bottom, and a moving block (13) is threadedly arranged on the surface of the threaded rod (11), and a moving plate (14) is fixedly arranged on the outer surface of the moving block (13).

2. The film blowing machine for plastic bag production according to claim 1, characterized by, The inner sides of the two ends of the moving plate (14) are fixedly provided with sliding blocks (15), the bottom sides of the two ends of the melt part (1) and the top sides of the two ends of the side end of the bubble stabilizing frame (4) are fixedly provided with mounting plates (16), and the two groups of mounting plates (16) are vertically fixedly provided with sliding rods (17), and the two sliding blocks (15) are respectively slidably arranged on the two sliding rods (17).

3. The film blowing machine for producing plastic bags according to claim 2, wherein A first recess (18) is formed in the center end face of the moving plate (14), a first bidirectional screw rod (19) is rotatably connected in the first recess (18), one end of the first bidirectional screw rod (19) is fixedly provided with a first motor (20), and the first motor (20) is located outside the moving plate (14), and threaded plates (21) are threadedly arranged at the two ends of the first bidirectional screw rod (19), clamping plates (22) are fixedly arranged at the outer ends of the two threaded plates (21), circular holes (23) are formed in the inner sides of the outer ends of the two clamping plates (22), and a film collecting roller (24) is rotatably connected between the two circular holes (23).

4. The film blowing machine for producing plastic bags according to claim 3, wherein The bubble pressing assembly comprises second recesses (25) formed in the interiors of the two connecting rods (7), second bidirectional screw rods (26) are transversely and rotatably connected in the interiors of the two second recesses (25), one end of each of the two second bidirectional screw rods (26) is fixedly provided with a second motor (27), and the two second motors (27) are respectively located outside the two connecting rods (7), threaded blocks (28) are threadedly arranged at the two ends of the two second bidirectional screw rods (26), and a bubble pressing roller (29) is fixedly and longitudinally connected between the two groups of threaded blocks (28).

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