Environment-friendly PE film stretching heating structure

Abstract

The application belongs to the technical field of film stretching processing equipment, and discloses an environment-friendly heating structure for PE film stretching, which comprises a heating box, the side walls on both sides of the heating box are provided with through holes for the PE film to pass through, the side walls on the other two sides of the heating box are provided with rotating discs penetratingly, two rotating discs are provided with a heating pipe penetratingly and fixedly and in an annular structure, heating rollers are rotatably arranged on the pipe bodies on both sides of the heating pipe, the PE film passes between the two heating rollers, the upper side wall of the PE film is attached to the side wall of the upper heating roller, the lower side wall of the PE film is attached to the side wall of the lower heating roller, and a film passing mechanism for automatically conveying the PE film from one side of the heating box to the other side of the heating box is arranged in the heating box. The application improves the prior art, avoids manual film passing, is convenient for the staff to use, and reduces the difficulty of film passing.

Description

Technical Field

[0001] This utility model relates to the technical field of membrane stretching equipment, and in particular to an environmentally friendly heating structure for stretching PE membrane. Background Technology

[0002] PE film, or polyethylene film, is characterized by its excellent moisture resistance and low moisture permeability. A blown film machine is a device that heats and melts PE plastic particles and then blows them into a film. After the film is blown, it needs to be stretched and laminated to achieve the desired state, and this process also requires heating the film.

[0003] Chinese utility model patent CN222590681U discloses an environmentally friendly heating structure for stretching PE film, including a shell. The shell has a first heating chamber and a second heating chamber at its two ends. The shell also includes a protrusion forming an upward airflow channel with the shell. The protrusion has a downward airflow channel. The shell contains a duct with two outlets located on the upper and lower sides of the first heating chamber. A first heating roller and a second heating roller pass through the first and second heating chambers, respectively. There are two downward airflow channels located at the two ends of the second heating roller. A first auxiliary roller group is provided at both ends of the upward airflow channel. A second auxiliary roller group is provided at both ends of the shell. Both the first and second auxiliary roller groups consist of two auxiliary roller shafts.

[0004] The existing heating structure has a fixed layout of heating chamber and heating rollers. After each roll of PE film is stretched, when switching to the next roll, one end of the new film needs to be manually passed through the space between the heating rollers and the through hole of the equipment. The operation is cumbersome and inconvenient, which increases the difficulty of threading the film. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides an environmentally friendly heating structure for stretching PE film.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an environmentally friendly heating structure for stretching PE film, including a heating box, through holes for PE film to pass through on both sides of the heating box, and turntables through the other two sides of the heating box, with a heating tube fixed to the turntables and forming an annular structure through both turntables, and heating rollers rotatably sleeved on both sides of the heating tube, the PE film passing between the two heating rollers, the upper sidewall of the PE film adhering to the sidewall of the upper heating roller, and the lower sidewall of the PE film adhering to the sidewall of the lower heating roller, and a film-passing mechanism for automatically transporting the PE film from one side of the heating box to the other side of the heating box is provided inside the heating box.

[0007] By adopting the above technical solution, when another roll or batch of PE film needs to be threaded after one roll or batch of PE film has been stretched, one end of the PE film is first passed through one of the through holes. Then, the PE film is installed on the threading mechanism. The threading mechanism then automatically transports the PE film from one side of the heating box to the other side. During this process, the PE film will pass through the heating tube and between the two heating rollers. Finally, the PE film is removed from the threading mechanism and passed out of the heating box through another through hole. No manual threading is required, which is convenient for workers and reduces the difficulty of threading.

[0008] Furthermore, the film-passing mechanism includes a film-passing assembly, which includes two linear modules respectively fixed to the inner walls of both sides of the heating chamber, a lower clamping plate fixed to the moving ends of the two linear modules and located below the PE film, two vertical rods fixed to the top of the lower clamping plate, and an upper clamping plate that slides with the two vertical rods and is located above the PE film. Both linear modules pass through the inner side of the heating tube. The film-passing mechanism also includes a lifting assembly for driving the upper clamping plate to rise and fall.

[0009] By adopting the above technical solution, one end of the PE film is first passed between the lower clamping plate and the upper clamping plate. Then, the lifting component works to lower the upper clamping plate and clamp the PE film. Next, the linear module works to move its moving end to move the lower clamping plate toward another through hole, thereby realizing the operation of passing the PE film through the hole.

[0010] Furthermore, the number of lifting components is equal to the number of linear modules and their positions correspond one-to-one. The lifting components include a limiting block fixed to the upper end of the vertical rod, a spring fixed between the limiting block and the upper clamping plate, a connecting column fixed to the linear module and in an inverted isosceles trapezoidal structure, and a lifting plate set on the upper clamping plate. The side wall of the lifting plate abuts against one of the inclined sides of the connecting column.

[0011] By adopting the above technical solution, during the movement of the lower clamping plate from one through hole to another, the vertical rod fixed to the lower clamping plate, the upper clamping plate connected to the vertical rod, the limiting block connected to the vertical rod, the spring fixed to the limiting block, and the lifting plate connected to the upper clamping plate all move. First, the lifting plate moves from the inclined side of one side of the vertical rod to the bottom of the connecting column. During this process, the lifting plate is forced to lower the upper clamping plate, and the spring is gradually stretched until the upper clamping plate is pressed against the top of the PE film. Finally, the lifting plate moves from the bottom of the connecting column to the inclined side of the other side of the connecting column. During this process, the spring gradually contracts and returns to its original position, thereby causing the upper clamping plate connected to the spring and the lifting plate connected to the upper clamping plate to rise and return to their original position until the upper clamping plate separates from the top of the PE film, thus realizing the operation of clamping or releasing the PE film.

[0012] Furthermore, the heating box is provided with a heating mechanism, which includes a heating assembly. The heating assembly includes a heating box fixed to the top of the heating box, an oil outlet pipe fixed and connected to one side wall of the heating box, a first telescopic pipe fixed and connected to the oil outlet pipe, and a heating plate fixed inside the heating box. The other end of the first telescopic pipe is connected to one end of the heating pipe. The heating mechanism also includes an oil return assembly for draining the heating oil in the heating pipe back into the heating box.

[0013] By adopting the above technical solution, the heating plate heats the oil in the heating box, the oil outlet pipe, the first telescopic pipe, and the heating pipe. The heat is transferred to the surface of the heating roller and heats the PE film that passes through it for subsequent stretching operations.

[0014] Furthermore, the oil return assembly includes an oil pump fixed to the top of the heating box, an oil inlet pipe fixed and connected to the oil inlet end of the oil pump, and a second telescopic pipe fixed and connected to the oil inlet pipe. The other end of the second telescopic pipe is connected to the other end of the heating pipe, and the oil outlet end of the oil pump is connected to the inside of the heating box.

[0015] By adopting the above technical solution, when the oil pump is working, the oil in the heating tube will pass through the second telescopic tube, the oil inlet pipe, and the oil inlet and outlet of the oil pump in sequence, and be discharged back into the heating box for circulating heating of the oil.

[0016] Furthermore, both turntables are rotatably connected to the heating box, which is equipped with a rotating mechanism. The rotating mechanism includes a rotating assembly, which includes a drive box fixed to one side wall of the heating box, an arc rack fixed to one of the turntables and coaxially arranged with the turntable, and a linear rack slidably arranged on the drive box and meshing with the arc rack. The rotating mechanism also includes a displacement assembly for driving the linear rack to move.

[0017] By adopting the above technical solution, when the displacement component is working, it drives the linear rack to move, which in turn drives the arc rack meshing with the linear rack, the turntable fixed with the arc rack, the heating tube fixed with the turntable, and the heating roller fixed with the heating tube to rotate. The tension of the heating roller on the PE film can be adjusted according to the specific stretching requirements.

[0018] Furthermore, the displacement assembly includes a threaded rod rotatably mounted in the drive housing and threadedly connected to a linear rack, a limiting rod fixed in the drive housing and slidingly engaged with the linear rack, and a motor fixed to the drive housing and driving the threaded rod to rotate.

[0019] By adopting the above technical solution, when the motor is working, it drives the threaded rod to rotate, and under the limit of the limit rod, the purpose of linear rack movement can be achieved.

[0020] Furthermore, the lifting plate is rotatably mounted on the upper clamping plate.

[0021] By adopting the above technical solution, the frictional force when the lifting plate comes into contact with the connecting column is reduced.

[0022] In summary, the present invention has the following beneficial effects: In this application, through the improvement of the prior art, manual film threading is not required, which makes it easier for staff to use and also reduces the difficulty of film threading. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0024] Figure 2 This is a cross-sectional schematic diagram of an embodiment of the present invention used to highlight the internal structure of the drive box;

[0025] Figure 3 This is a structural diagram illustrating the internal structure of the heating box in an embodiment of this utility model;

[0026] Figure 4 This is a schematic diagram illustrating the connection structure between the circular arc rack and the straight rack in an embodiment of this utility model;

[0027] Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0028] In the diagram: 1. Heating box; 2. Through hole; 3. Turntable; 4. Heating tube; 5. Heating roller; 6. Film threading mechanism; 61. Film threading assembly; 611. Linear module; 612. Lower clamping plate; 613. Vertical rod; 614. Upper clamping plate; 62. Lifting assembly; 621. Limiting block; 622. Spring; 623. Connecting column; 624. Lifting plate; 7. Heating mechanism; 71. Heating assembly; 711. Heating box; 712. Oil outlet pipe; 713. First telescopic pipe; 714. Heating plate; 72. Oil return assembly; 721. Oil pump; 722. Oil inlet pipe; 723. Second telescopic pipe; 8. Rotating mechanism; 81. Rotating assembly; 811. Drive box; 812. Circular arc rack; 813. Linear rack; 82. Displacement assembly; 821. Threaded rod; 822. Limiting rod; 823. Motor. Detailed Implementation

[0029] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0030] like Figure 1-5 As shown in the embodiment of this application, an environmentally friendly heating structure for stretching PE film is disclosed, including a heating box 1, a film-passing mechanism 6, a heating mechanism 7, and a rotating mechanism 8. Both sides of the heating box 1 have through holes 2 for the PE film to pass through. Turntables 3 are also provided on the other two sides of the heating box 1, and heating pipes 4, fixed to the turntables 3 and forming a ring structure, are provided through both turntables 3. Both turntables 3 are rotatably connected to the heating box 1. Heating rollers 5 are rotatably sleeved on both sides of the heating pipes 4, and the PE film passes between the two heating rollers 5. The upper sidewall of the PE film is in contact with the sidewall of the upper heating roller 5, and the lower sidewall of the PE film is in contact with the sidewall of the lower heating roller 5. After one roll or batch of PE film is stretched, when another roll or batch of PE film needs to be threaded, first pass one end of the PE film through one of the through holes 2, then install the PE film on the threading mechanism 6. Next, the threading mechanism 6 works to automatically transport the PE film from one side of the heating box 1 to the other side of the heating box 1. During this process, the PE film will pass through the heating pipe 4 and between the two heating rollers 5. Finally, the PE film is removed from the threading mechanism 6 and passed out of the heating box 1 through another through hole 2. No manual threading is required, which is convenient for workers and reduces the difficulty of threading.

[0031] The film-passing mechanism 6 is installed inside the heating chamber 1. The film-passing mechanism 6 is used to automatically transport the PE film from one side of the heating chamber 1 to the other side. The film-passing mechanism 6 includes a film-passing assembly 61 and a lifting assembly 62. The film-passing assembly 61 includes a linear module 611, a lower clamping plate 612, vertical rods 613, and an upper clamping plate 614. Two linear modules 611 are provided, and the two linear modules 611 are respectively fixed to the inner walls on both sides of the heating chamber 1. Both linear modules 611 pass through the inner side of the heating pipe 4. The lower clamping plate 612 is fixed to the moving ends of the two linear modules 611 and is located below the PE film. Two vertical rods 613 are provided, and both vertical rods 613 are fixed to the top of the lower clamping plate 612. The upper clamping plate 614 is slidably engaged with both vertical rods 613 and is located above the PE film. First, one end of the PE film is passed between the lower clamping plate 612 and the upper clamping plate 614. Then, the lifting assembly 62 works to lower the upper clamping plate 614 and clamp the PE film. Next, the linear module 611 works to move its moving end to move the lower clamping plate 612 toward another through hole 2, thereby realizing the operation of passing the PE film through the hole.

[0032] The lifting assembly 62 is used to drive the upper clamping plate 614 to rise and fall. The lifting assembly 62 includes a limiting block 621, a spring 622, a connecting column 623, and a lifting plate 624. The number of lifting assemblies 62 is equal to the number of linear modules 611, and their positions correspond one-to-one. The limiting block 621 is fixed to the upper end of the vertical rod 613. The spring 622 is fixed between the limiting block 621 and the upper clamping plate 614. The connecting column 623 is fixed to the linear module 611 and has an inverted isosceles trapezoidal structure. The lifting plate 624 is disposed on the upper clamping plate 614, and the side wall of the lifting plate 624 abuts against one of the inclined sides of the connecting column 623. As the lower clamping plate 612 moves from one through hole 2 towards another through hole 2, it drives the vertical rod 613 fixed to the lower clamping plate 612, the upper clamping plate 614 connected to the vertical rod 613, the limiting block 621 connected to the vertical rod 613, the spring 622 fixed to the limiting block 621, and the lifting plate 624 connected to the upper clamping plate 614 to move. First, the lifting plate 624 moves from the inclined side of the vertical rod 613 to the bottom of the connecting column 623. During this process, the lifting plate 624 is forced to move the upper clamping plate 612. As plate 614 descends, spring 622 is gradually stretched until the upper clamping plate 614 is pressed tightly against the top of the PE film. Finally, lifting plate 624 moves from the bottom of connecting column 623 to the inclined side of the other side of connecting column 623. During this process, spring 622 gradually contracts and returns to its original position, causing the upper clamping plate 614 connected to spring 622 and the lifting plate 624 connected to the upper clamping plate 614 to rise and return to their original position until the upper clamping plate 614 separates from the top of the PE film, thereby realizing the operation of clamping or releasing the PE film.

[0033] A heating mechanism 7 is mounted on the heating box 1 and includes a heating assembly 71 and an oil return assembly 72. The heating assembly 71 includes a heating box 711, an oil outlet pipe 712, a first telescopic pipe 713, and a heating plate 714. The heating box 711 is fixed to the top of the heating box 1. The oil outlet pipe 712 is fixed to and connected to one side wall of the heating box 711, and the first telescopic pipe 713 is fixed to and connected to the oil outlet pipe 712. The other end of the first telescopic pipe 713 is connected to one end of the heating pipe 4, and the heating plate 714 is fixed inside the heating box 711. The heating plate 714 heats the oil inside the heating box 711, the oil outlet pipe 712, the first telescopic pipe 713, and the heating pipe 4. The heat is transferred to the surface of the heating roller 5 and heats the passing PE film for subsequent stretching operations.

[0034] The oil return assembly 72 is used to return the heating oil in the heating tube 4 back to the heating box 711. The oil return assembly 72 includes an oil pump 721, an oil inlet pipe 722, and a second telescopic pipe 723. The oil pump 721 is fixed to the top of the heating box 711, and its outlet end is connected to the inside of the heating box 711. The oil inlet pipe 722 is fixed and connected to the inlet end of the oil pump 721. The second telescopic pipe 723 is fixed and connected to the inlet pipe 722, and its other end is connected to the other end of the heating tube 4. When the oil pump 721 is working, the oil in the heating tube 4 will pass through the second telescopic pipe 723, the oil inlet pipe 722, and the inlet and outlet ends of the oil pump 721 in sequence, and then be returned to the heating box 711 for circulating heating.

[0035] A rotating mechanism 8 is mounted on the heating chamber 1. The rotating mechanism 8 includes a rotating component 81 and a displacement component 82. The rotating component 81 includes a drive housing 811, an arc rack 812, and a linear rack 813. The drive housing 811 is fixed to one side wall of the heating chamber 1. The arc rack 812 is fixed to one of the turntables 3 and is coaxially arranged with the turntable 3. The linear rack 813 is slidably arranged on the drive housing 811 and meshes with the arc rack 812. When the displacement component 82 is working, it drives the linear rack 813 to move, which in turn drives the arc rack 812 meshing with the linear rack 813, the turntable 3 fixed with the arc rack 812, the heating tube 4 fixed with the turntable 3, and the heating roller 5 fixed with the heating tube 4 to rotate. The tension of the heating roller 5 on the PE film can be adjusted according to the specific stretching requirements.

[0036] The displacement assembly 82 is used to drive the linear rack 813 to move. The displacement assembly 82 includes a threaded rod 821, a limiting rod 822, and a motor 823. The threaded rod 821 is rotatably mounted in the drive housing 811 and threadedly connected to the linear rack 813. The limiting rod 822 is fixed in the drive housing 811 and slides with the linear rack 813. The motor 823 is fixed to the drive housing 811 and drives the threaded rod 821 to rotate. When the motor 823 is working, it drives the threaded rod 821 to rotate. Under the limitation of the limiting rod 822, the linear rack 813 can move.

[0037] The lifting plate 624 is rotatably mounted on the upper clamping plate 614. This reduces the friction when the lifting plate 624 contacts the connecting column 623.

[0038] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An environmentally friendly heating structure for stretching PE film, comprising a heating box (1), wherein through holes (2) are provided on both sides of the sidewalls of the heating box (1), characterized in that: Turntables (3) are installed through the side walls on both sides of the heating box (1). A heating tube (4) fixed to the turntable (3) is installed through the two turntables (3). Heating rollers (5) are rotatably sleeved on both sides of the heating tube (4). A film-passing mechanism (6) is provided inside the heating box (1) for automatically transporting the PE film from one side of the heating box (1) to the other side of the heating box (1).

2. The environmentally friendly heating structure for stretching PE film according to claim 1, characterized in that: The film-piercing mechanism (6) includes a film-piercing assembly (61), which includes two linear modules (611) fixed to the inner walls of the heating box (1) on both sides, a lower clamping plate (612) fixed to the moving ends of the two linear modules (611) and located below the PE film, two vertical rods (613) fixed to the top of the lower clamping plate (612), and an upper clamping plate (614) that slides with the two vertical rods (613) and is located above the PE film. Both linear modules (611) pass through the inner side of the heating tube (4). The film-piercing mechanism (6) also includes a lifting assembly (62) for driving the upper clamping plate (614) to rise and fall.

3. The environmentally friendly heating structure for stretching PE film according to claim 2, characterized in that: The number of lifting components (62) is equal to the number of linear modules (611) and their positions correspond one-to-one. The lifting components (62) include a limiting block (621) fixed to the upper end of the vertical rod (613), a spring (622) fixed between the limiting block (621) and the upper clamping plate (614), a connecting column (623) fixed to the linear module (611) and in an inverted isosceles trapezoidal structure, and a lifting plate (624) set on the upper clamping plate (614). The side wall of the lifting plate (624) abuts against one of the inclined sides of the connecting column (623).

4. The environmentally friendly heating structure for stretching PE film according to claim 1, characterized in that: The heating box (1) is provided with a heating mechanism (7), which includes a heating component (71). The heating component (71) includes a heating box (711) fixed to the top of the heating box (1), an oil outlet pipe (712) fixed and connected to one side wall of the heating box (711), a first telescopic pipe (713) fixed and connected to the oil outlet pipe (712), and a heating plate (714) fixed inside the heating box (711). The other end of the first telescopic pipe (713) is connected to one end of the heating pipe (4). The heating mechanism (7) also includes an oil return component (72) for draining the heating oil in the heating pipe (4) back into the heating box (711).

5. The environmentally friendly heating structure for stretching PE film according to claim 4, characterized in that: The oil return assembly (72) includes an oil pump (721) fixed to the top of the heating box (711), an oil inlet pipe (722) fixed and connected to the oil inlet end of the oil pump (721), and a second telescopic pipe (723) fixed and connected to the oil inlet pipe (722). The other end of the second telescopic pipe (723) is connected to the other end of the heating pipe (4), and the oil outlet end of the oil pump (721) is connected to the inside of the heating box (711).

6. The environmentally friendly heating structure for stretching PE film according to claim 1, characterized in that: Both of the turntables (3) are rotatably connected to the heating box (1). The heating box (1) is provided with a rotating mechanism (8). The rotating mechanism (8) includes a rotating component (81). The rotating component (81) includes a drive box (811) fixed to one side wall of the heating box (1), an arc rack (812) fixed to one of the turntables (3) and coaxially arranged with the turntable (3), and a straight rack (813) slidably arranged on the drive box (811) and meshing with the arc rack (812). The rotating mechanism (8) also includes a displacement component (82) for driving the straight rack (813) to move.

7. The environmentally friendly heating structure for stretching PE film according to claim 6, characterized in that: The displacement assembly (82) includes a threaded rod (821) rotatably mounted in the drive box (811) and threadedly connected to the linear rack (813), a limiting rod (822) fixed in the drive box (811) and slidingly engaged with the linear rack (813), and a motor (823) fixed on the drive box (811) and driving the threaded rod (821) to rotate.

8. The environmentally friendly heating structure for stretching PE film according to claim 3, characterized in that: The lifting plate (624) is rotatably mounted on the upper clamping plate (614).

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