Biaxial stretching device for polypropylene film

Abstract

The utility model discloses a biaxial stretching device for polypropylene film, including support plate, protection cabin, liquid spray cover and stretcher casing, liquid spray cover is provided in the lateral part of stretcher casing, the protection cabin is provided in the upper end of liquid spray cover, the protection cabin is provided with draught fan inside, the liquid spray cover is provided with the liquid spray cover inside, the liquid spray cover is provided with the liquid spray cover inside, and the liquid spray cover is provided with the liquid spray cover inside. One end of the induced draft fan is fixedly connected with the exterior of the liquid spraying cover, a heating bin is arranged on the side portion of the protection bin, the side portion of the heating bin is fixedly connected with one end of the induced draft fan, an electric heating bar is arranged in the heating bin, a heat preservation layer is arranged on the inner wall of the heating bin and corresponds to the electric heating bar, and an air outlet disc is arranged on the lower portion of the heating bin. And the upper end of the air outlet disc is fixedly connected with the lower end of the heating bin, and an oil storage bin is arranged on the upper portion of the top end of the liquid spraying cover. According to the utility model, the film can be easily protected, and the film protection effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of polypropylene films, in particular to a bidirectional stretching device for polypropylene films. Background Art

[0002] Polypropylene film is a common plastic film, which is made of propylene polymerization. It has excellent physical, chemical and mechanical properties and is widely used in various fields of manufacturing industry. Polypropylene film can be made by extrusion or blow molding. In the packaging industry, it is mainly used to make various food packaging bags, fresh-keeping bags, cling film, medical packaging, daily chemical packaging, etc. In addition, it is also widely used in electrical appliances, automobiles, construction, decoration and packaging. Therefore, the biaxial stretching device for polypropylene film plays an important role.

[0003] Conventional biaxial stretching devices for polypropylene films have some disadvantages. They cannot form a protective layer on the surface of the film, which can easily cause the film to be exposed to the air for a long time and be contaminated with bacteria, thus affecting the quality of the film. Utility Model Content

[0004] The utility model aims to provide a biaxial stretching device for polypropylene film to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a biaxial stretching device for polypropylene film, comprising a support plate, a protective bin, a liquid spray hood and a stretching machine housing, wherein the liquid spray hood is arranged on the side of the stretching machine housing, the protective bin is arranged at the upper end inside the liquid spray hood, an induced draft fan is arranged inside the protective bin, and one end of the induced draft fan is fixedly connected to the outside of the liquid spray hood, a heating bin is arranged on the side of the protective bin, and the side of the heating bin is fixedly connected to one end of the induced draft fan, an electric heating rod is arranged inside the heating bin, and an insulation layer is arranged on the inner wall of the heating bin corresponding to the electric heating rod, under the action of the induced draft fan, an airflow is formed, and the airflow is introduced into the heating bin through the induced draft fan, and due to the heating effect of the electric heating rod, the air can be heated to form hot air.

[0006] Preferably, an air outlet plate is provided at the lower part of the heating bin, and the upper end of the air outlet plate is fixedly connected to the lower end of the heating bin, and hot air is ejected through the air outlet plate. Since the through holes at the lower end of the air outlet plate are evenly distributed, the hot air can dry the film evenly and enhance the adhesion of the oil film.

[0007] Preferably, an oil storage bin is provided on the upper portion of the top of the liquid spray hood, and a liquid guide tube is connected to the side of the oil storage bin, and a solenoid valve is provided on the liquid guide tube, through which the flow rate of the derived oil can be adjusted.

[0008] Preferably, an extraction pump is provided on the upper part of the top of the liquid spray hood, and one end of the extraction pump is fixedly connected to one end of the liquid guide tube. Under the action of the extraction pump, the oil passes through the liquid guide tube and is discharged through the extraction pump 11.

[0009] Preferably, a spray disc is provided at the upper end of the interior of the spray hood, and a liquid outlet pipe is connected between the upper end of the spray disc and one end of the extraction pump. The oil is introduced into the spray disc through the liquid outlet pipe to spray the surface of the film. Since the through holes at the lower end of the spray disc are small and evenly distributed, it is conducive to uniform spraying of the oil. Therefore, the side of the film sprayed with oil will not be affected by the growth of bacteria and can be rolled up as the outer side.

[0010] Preferably, a discharging roller is arranged at one end inside the liquid spray hood, and the support plate is arranged on the side of the discharging roller corresponding to the air outlet plate.

[0011] Preferably, a bracket is fixed between the lower end of the support plate and the lower end of the interior of the liquid spray hood, and protective rollers are provided at both ends of the support plate.

[0012] Preferably, a steering roller is provided on the side of the support plate, and an oil receiving roller is provided on the side of the steering roller corresponding to the spraying disc, and the film receives the sprayed oil on the spraying disc and then deflects through the steering roller.

[0013] Compared with the prior art, the utility model has the following beneficial effects: it is easy to protect the film and has good film protection effect;

[0014] (1) The flow rate of the oil can be adjusted by the solenoid valve. Under the action of the extraction pump, the oil passes through the liquid guide tube and is extracted by the extraction pump. The oil is then introduced into the spray plate through the outlet pipe to spray the surface of the film. Since the through holes at the lower end of the spray plate are small and evenly distributed, it is conducive to uniform spraying of the oil. Therefore, the side of the film sprayed with oil will not be affected by the growth of bacteria, and the film is easy to protect.

[0015] (2) Under the action of the induced draft fan, an airflow is formed, which is introduced into the heating chamber through the induced draft fan. Due to the heating effect of the electric heating rod, the air can be heated to form hot air, which is ejected through the air outlet plate. Since the through holes at the lower end of the air outlet plate are evenly distributed, the hot air can dry the film evenly, which is conducive to enhancing the adhesion of the oil film and has a good protective effect on the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 3 For the utility model Figure 1The enlarged structural diagram at A in the middle;

[0019] Figure 4 This is a schematic diagram of the heating chamber and the protection chamber structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the support plate and protective roller structure of the utility model;

[0021] In the figure: 1. Oil storage bin; 2. Spray hood; 3. Discharge roller; 4. Bracket; 5. Support plate; 6. Steering roller; 7. Oil receiving roller; 8. Stretching machine housing; 9. Spraying plate; 10. Liquid outlet pipe; 11. Extraction pump; 12. Draft fan; 13. Protection bin; 14. Air outlet disc; 15. Heating bin; 16. Insulation layer; 17. Electric heating rod; 18. Liquid guide pipe; 19. Solenoid valve; 20. Protection roller.

[0022] Detailed description of the invention Barrel

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-5 The utility model provides an embodiment: a biaxial stretching device for polypropylene film, comprising a support plate 5, a protective bin 13, a liquid spraying hood 2 and a stretching machine housing 8, wherein the liquid spraying hood 2 is arranged on the side of the stretching machine housing 8, the protective bin 13 is arranged at the upper end inside the liquid spraying hood 2, an induced draft fan 12 is arranged inside the protective bin 13, and one end of the induced draft fan 12 is fixedly connected to the outside of the liquid spraying hood 2, a heating bin 15 is arranged on the side of the protective bin 13, and the side of the heating bin 15 is fixedly connected to one end of the induced draft fan 12, an electric heating rod 17 is arranged inside the heating bin 15, and an insulation layer 16 is arranged on the inner wall of the heating bin 15 corresponding to the electric heating rod 17;

[0025] When in use, under the action of the induced draft fan 12, an airflow is formed, and the airflow is introduced into the heating chamber 15 through the induced draft fan 12. Due to the heating effect of the electric heating rod 17, the air can be heated to form hot air;

[0026] An air outlet plate 14 is provided at the lower part of the heating chamber 15, and the upper end of the air outlet plate 14 is fixedly connected to the lower end of the heating chamber 15;

[0027] When in use, hot air is ejected through the air outlet plate 14. Since the through holes at the lower end of the air outlet plate 14 are evenly distributed, the hot air is conducive to drying the film evenly, which is conducive to enhancing the adhesion of the oil film.

[0028] An oil storage tank 1 is provided at the top of the liquid spraying cover 2, and a liquid guide tube 18 is connected to the side of the oil storage tank 1, and a solenoid valve 19 is provided on the liquid guide tube 18;

[0029] When in use, the flow rate of the oil can be adjusted by the solenoid valve 19;

[0030] An extraction pump 11 is provided at the upper portion of the top of the liquid spraying cover 2, and one end of the extraction pump 11 is fixedly connected to one end of the liquid guiding tube 18;

[0031] When in use, under the action of the extraction pump 11, the oil passes through the liquid guide tube 18 and is discharged through the extraction pump 11;

[0032] A spraying disc 9 is provided at the upper end of the liquid spraying cover 2, and a liquid outlet pipe 10 is connected between the upper end of the spraying disc 9 and one end of the extraction pump 11;

[0033] When in use, the oil is introduced into the spraying disc 9 through the liquid outlet pipe 10 and sprayed on the surface of the film. Since the through holes at the lower end of the spraying disc 9 are small and evenly distributed, it is conducive to spraying the oil evenly. Therefore, the side of the film sprayed with oil will not be affected by bacteria and can be rolled up as the outer side.

[0034] A steering roller 6 is provided on the side of the support plate 5, and an oil receiving roller 7 is provided on the side of the steering roller 6 corresponding to the spraying disc 9;

[0035] When in use, the film receives the sprayed oil on the spray disc 9 and then turns through the turning roller 6;

[0036] A bracket 4 is fixed between the lower end of the support plate 5 and the lower end of the inside of the liquid spraying cover 2, and protective rollers 20 are provided at both ends of the support plate 5;

[0037] When in use, the film passes through the support plate 5 for drying, and the surface of the protective roller 20 is curved to avoid pulling the film and facilitate the movement of the film;

[0038] A discharge roller 3 is disposed at one end of the liquid spraying cover 2, and a support plate 5 is disposed on the side of the discharge roller 3 corresponding to the air outlet plate 14;

[0039] When in use, the film passes through the discharge roller 3 and then is reeled up;

[0040] When the embodiment of the present application is in use: first, the film receives the sprayed oil on the spray disc 9, then turns through the turning roller 6, the film passes through the support plate 5 for drying, the surface of the protective roller 20 is curved to avoid pulling the film and facilitate the movement of the film, the film passes through the discharge roller 3, and then is rolled up. At the same time, the flow rate of the derived oil can be adjusted by the solenoid valve 19. Under the action of the extraction pump 11, the oil passes through the liquid guide pipe 18 and is discharged through the extraction pump 11. The oil is then introduced into the spray disc 9 through the liquid outlet pipe 10 to spray the surface of the film. Due to the through hole at the lower end of the spray disc 9 It is in small shape and evenly distributed, which is conducive to uniform spraying of oil. Therefore, the side of the film sprayed with oil will not be affected by the growth of bacteria and can be rolled up as the outer side. Subsequently, under the action of the induced draft fan 12, an airflow is formed, and the airflow is introduced into the heating chamber 15 through the induced draft fan 12. Due to the heating effect of the electric heating rod 17, the air can be heated to form hot air, and the hot air is ejected through the air outlet plate 14. Since the through holes at the lower end of the air outlet plate 14 are evenly distributed, the hot air can dry the film evenly, which is conducive to enhancing the adhesion of the oil film. In summary, the device is easy to protect the film and has a good film protection effect.

Claims

1. A biaxial stretching device for polypropylene film, characterized in that: The invention comprises a support plate (5), a protective chamber (13), a liquid spray hood (2) and a stretching machine housing (8), wherein the liquid spray hood (2) is arranged on the side of the stretching machine housing (8), the protective chamber (13) is arranged at the upper end inside the liquid spray hood (2), an induced draft fan (12) is arranged inside the protective chamber (13), and one end of the induced draft fan (12) is fixedly connected to the outside of the liquid spray hood (2), a heating chamber (15) is arranged on the side of the protective chamber (13), and the side of the heating chamber (15) is fixedly connected to one end of the induced draft fan (12), an electric heating rod (17) is arranged inside the heating chamber (15), and an insulation layer (16) is arranged on the inner wall of the heating chamber (15) corresponding to the electric heating rod (17).

2. A biaxial stretching device for polypropylene film according to claim 1, characterized in that: An air outlet plate (14) is provided at the lower part of the heating chamber (15), and the upper end of the air outlet plate (14) is fixedly connected to the lower end of the heating chamber (15).

3. The biaxial stretching device for polypropylene film according to claim 1, characterized in that: An oil storage bin (1) is arranged at the upper part of the top of the liquid spraying cover (2), and a liquid guide tube (18) is connected to the side of the oil storage bin (1), and a solenoid valve (19) is arranged on the liquid guide tube (18).

4. A biaxial stretching device for polypropylene film according to claim 3, characterized in that: An extraction pump (11) is provided at the upper portion of the top end of the liquid spraying cover (2), and one end of the extraction pump (11) is fixedly connected to one end of the liquid guiding tube (18).

5. A biaxial stretching device for polypropylene film according to claim 4, characterized in that: A spray disc (9) is provided at the upper end of the interior of the liquid spray cover (2), and a liquid outlet pipe (10) is connected between the upper end of the spray disc (9) and one end of the extraction pump (11).

6. A biaxial stretching device for polypropylene film according to claim 5, characterized in that: A discharge roller (3) is arranged at one end inside the liquid spray cover (2), and the support plate (5) is arranged on the side of the discharge roller (3) corresponding to the air outlet plate (14).

7. A biaxial stretching device for polypropylene film according to claim 6, characterized in that: A bracket (4) is fixed between the lower end of the support plate (5) and the lower end of the interior of the liquid spraying cover (2), and protective rollers (20) are provided at both ends of the support plate (5).

8. A biaxial stretching device for polypropylene film according to claim 7, characterized in that: A steering roller (6) is provided on the side of the support plate (5), and an oil receiving roller (7) is provided on the side of the steering roller (6) corresponding to the spraying disc (9).

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