Environment-friendly water-soluble packaging film manufacturing device

Abstract

The utility model belongs to the technical field of water-soluble film manufacturing, and particularly relates to an environment-friendly water-soluble packaging film manufacturing device which comprises a hot melting tank, a film carrying conveying belt and a liquid distribution roller which are sequentially arranged from top to bottom, the hot melting tank is communicated with a shovel type hopper, the shovel type hopper is of an inclined triangular structure, and the lower end opening of the shovel type hopper is provided with a radian attached to the outer circle of the liquid distribution roller. Two parallel tensioning rollers are arranged above the film carrying conveying belt, ventilation openings are formed in the end faces of the two tensioning rollers, a cooling fan is arranged above the two tensioning rollers, the cooling fan faces the area, located between the two tensioning rollers, of a belt of the film carrying conveying belt, and an air guide plate with holes is horizontally arranged under the cooling fan. Scraper knives are fixed to the two ends of the air guide plate with the holes, and blades of the two scraper knives face the lower arc faces of the two tensioning rollers correspondingly. According to the utility model, molten mixed materials are cooled into films and tensioned at two points, cold air is blown to a tensioning area to be idle and wasted, and the cold air is separated from the molten mixed materials.

Description

Technical Field

[0001] The utility model belongs to the technical field of water-soluble film manufacturing, and particularly relates to a device for manufacturing an environmentally friendly water-soluble packaging film. Background Art

[0002] Water-soluble films are manufactured using water-soluble polymers such as PVA (polyvinyl alcohol) and PEO (polyethylene oxide) as raw materials, along with other additives, and then processed by melt extrusion or solution flow methods. Melt extrusion requires strict temperature control during the extrusion process, requiring both high equipment and operator experience, making it less widely used.

[0003] The solution flow method heats the mixture into a molten liquid, distributes it along a wide-mouthed flow channel onto cooling rollers, and then uses a non-stick conveyor belt to pull it toward the far end. In this way, the molten mixture is continuously spread out to form a film, allowing for continuous production.

[0004] When the water-soluble film is being pulled, the first cooling is performed using a cooling roller, and a cold air channel is set at the far end for the final cooling. There is a blank area between the two cooling spaces, so that the film material in this area only dissipates heat naturally. This makes it inconvenient to cool the entire process during production, resulting in a certain amount of idle waste. Utility Model Content

[0005] The purpose of the utility model is to provide an environmentally friendly water-soluble packaging film manufacturing device, which takes into account the cooling of the molten mixture into a film and two-point tensioning, blows cold air towards the tensioning area to avoid idle waste, and separates the cold air from the molten mixture.

[0006] The technical solutions adopted by this utility model are as follows:

[0007] A device for manufacturing environmentally friendly water-soluble packaging film, comprising a hot melt tank, a film carrier conveyor belt and a liquid distributing roller arranged in sequence from top to bottom, the hot melt tank is connected to a shovel-type hopper, the shovel-type hopper is an inclined triangular structure and the lower port has an arc that fits the outer circle of the liquid distributing roller, two mutually parallel tensioning rollers are arranged above the film carrier conveyor belt, the end faces of the two tensioning rollers are provided with ventilation holes, and cooling fans are arranged above the two tensioning rollers, the cooling fans facing the film carrier conveyor belt are located between the two tensioning rollers In the area between the films, the discharge port of the hot melt tank is opened to allow the molten mixture to flow to the liquid distribution roller and spread it out. The liquid distribution roller sends the film-shaped molten mixture toward the film-carrying conveyor belt. At the same time, the two tensioning rollers cooperate with the film-carrying conveyor belt to squeeze the molten mixture and take away the heat of the molten mixture, taking into account the cooling of the molten mixture into a film and two-point tensioning. The cooling fan is then used to blow cold air toward the tensioning area, which facilitates rapid cooling of the film and avoids idle waste in the tensioning area. The two tensioning rollers block the cold wind to prevent the cold wind from blowing away the molten mixture on the liquid distribution roller.

[0008] As a preferred solution, a perforated air guide plate is horizontally arranged directly below the cooling fan, and scrapers are fixed at both ends of the perforated air guide plate. The two scraper blades are respectively facing the lower arc surfaces of the two tensioning rollers. The number of cooling fans is set to three, which are respectively facing the three holes on the perforated air guide plate. In this way, the cold air blown out passes through the three holes and can diffuse laterally to cover as large an area as possible, so that the perforated air guide plate guides the cold air while scraping off the mixed material residue adhering to the two tensioning rollers through the scrapers, thereby reducing the workload of manual cleaning of the tensioning rollers.

[0009] As a preferred solution, two baffles distributed in an eight-shape are fixed on both sides of the hole of the perforated air guide plate. The baffles are arranged above the film-carrying conveyor belt. The cold air is diffused by the inclined surface guided by the baffles to cover a larger area. At the same time, each stream of cold air is separated so that they flow independently to the film to prevent deviation.

[0010] As a preferred solution, suspension rods are fixed to the four corners of the lower surface of the cooling fan, and the ends of the suspension rods away from the cooling fan are fixed to the upper surface of the air guide plate with holes. The suspension rods are used to support the cooling fan upward and keep a distance from the air guide plate with holes, so as to facilitate the cleaning of the cooling fan and leave installation space for the air guide plate with holes. In particular, the holes of the air guide plate with holes can be equipped with dust-proof mesh.

[0011] As a preferred solution, a synchronous belt is provided between the ends of the two tensioning rollers away from the vents, and one end of one of the tensioning rollers is connected to a drive motor, which provides power. The synchronous belt is transmitted between the two tensioning rollers to achieve synchronous rotation and squeeze the film.

[0012] As a preferred solution, a cold air duct is axially inserted in the middle of the two vents, and the air inlet of the cold air duct is connected to the air-conditioning fresh air system, which can transport the air-conditioned cold air to the vents to take away the heat of the two tensioning rollers and realize the cooling of the two tensioning rollers.

[0013] As a preferred solution, a weir is provided at one end of the film carrier conveyor belt away from the tensioning roller, and the lower end of the weir has a cutting edge parallel to the liquid distribution roller. The belt of the film carrier conveyor belt is scraped off through the cutting edge to prevent it from sticking into the tensioning area, thereby improving the safety of film cooling and molding.

[0014] The technical effects achieved by this utility model are:

[0015] The utility model opens the discharge port of the hot melt tank to allow the molten mixture to flow onto the liquid distributing roller and be spread out. The liquid distributing roller sends the film-shaped molten mixture toward the film-carrying conveyor belt. At the same time, the two tensioning rollers cooperate with the film-carrying conveyor belt to squeeze the molten mixture and take away the heat of the molten mixture, taking into account the cooling of the molten mixture into a film and the two-point tensioning. Then, the heat dissipation fan is used to blow cold air toward the tensioning area, which facilitates the rapid cooling of the film and avoids the idle waste of the tensioning area. In addition, the two tensioning rollers block the cold wind to prevent the cold wind from blowing away the molten mixture on the liquid distributing roller.

[0016] The number of the cooling fans of the utility model is set to three, which are respectively facing the three holes on the perforated air guide plate, so that the cold air blown out passes through the three holes and can be diffused laterally to cover a larger area as possible, so that the perforated air guide plate guides the cold air while scraping off the mixed material residues adhering to the two tensioning rollers through the scraper, reducing the workload of manual cleaning of the tensioning rollers. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a front view of an environmentally friendly water-soluble packaging film manufacturing device of the utility model;

[0018] Figure 2 This is a top view of an environmentally friendly water-soluble packaging film manufacturing device of the utility model;

[0019] Figure 3 This is a bottom view of the air guide plate with holes of the utility model;

[0020] Figure 4 It is a cross-sectional view of the hot melt tank of the present utility model.

[0021] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0022] 1. Hot melt tank; 2. Film carrier conveyor belt; 3. Liquid distribution roller; 4. Shovel hopper; 5. Tensioning roller; 6. Ventilation port; 7. Cooling fan; 8. Perforated air guide plate; 9. Shovel blade; 10. Baffle; 11. Suspension rod; 12. Synchronous belt; 13. Drive motor; 14. Cold air duct; 15. Weir. DETAILED DESCRIPTION

[0023] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is described in detail below with reference to the following embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention and does not strictly limit the scope of protection of the present invention.

[0024] like Figures 1-4As shown, an environmentally friendly water-soluble packaging film manufacturing device includes a hot melt tank 1, a film-carrying conveyor belt 2 and a liquid distributing roller 3 arranged in sequence from top to bottom, and also includes a steel structure frame. The hot melt tank 1 is grounded through an external steel frame. The film-carrying conveyor belt 2 and the liquid distributing roller 3 are both rotatably installed inside the steel structure frame through bearings. The hot melt tank 1 is connected to a shovel-type hopper 4 through an alloy bellows. The shovel-type hopper 4 is an inclined triangular structure and the lower port has an arc that fits the outer circle of the liquid distributing roller 3. Two mutually parallel tensioning rollers 5 are arranged above the film-carrying conveyor belt 2. The two tensioning rollers 5 are rotatably installed inside the steel structure frame through bearings. Ventilation holes 6 are opened on the end faces of the two tensioning rollers 5. A cooling fan 7 is arranged above the two tensioning rollers 5. The cooling fan 7 faces the film-carrying conveyor belt 2. The belt is located in the area between the two tensioning rollers 5.

[0025] Furthermore, the liquid outlet of the hot melt tank 1 faces the side of the liquid distributing roller 3 close to the film carrier conveyor belt 2, so that the liquid distributing roller 3 coats the molten mixture in the direction of the tensioning roller 5.

[0026] Furthermore, a distance is left between the lower surfaces of the two tensioning rollers 5 and the upper surface of the film-carrying conveyor belt 2. This distance is preferably 0.5 mm in this embodiment to ensure that the thickness of the environmentally friendly water-soluble packaging film formed after two extrusions is kept as uniform as possible.

[0027] Through the above structure, during production, water-soluble polymer materials and additives are put into the hot melt tank 1 in a certain proportion, heated and melted into a liquid by an external heater, and the discharge port of the hot melt tank 1 is opened to allow the molten mixture to flow to the liquid distribution roller 3 for spreading. The liquid distribution roller 3 sends the film-shaped molten mixture in the direction of travel of the film carrier conveyor belt 2. At the same time, the lower surfaces of the two tensioning rollers 5 also rotate in the direction of travel of the film carrier conveyor belt 2, which can cooperate with the film carrier conveyor belt 2 to extrude the molten mixture and take away the heat of the molten mixture, taking into account the cooling of the molten mixture into a film and two-point tensioning. The cooling fan 7 is then used to blow cold air toward the tensioning area, which facilitates rapid cooling of the film and avoids idle waste of the tensioning area. The two tensioning rollers 5 block the cold wind to prevent the cold wind from blowing away the molten mixture on the liquid distribution roller 3.

[0028] The film is limited by the steel structure frame on both sides to maintain a certain width, and its thickness will remain uniform under the uniform extrusion of the two film-carrying conveyor belts 2, and the overall squareness is good, so that the environmentally friendly water-soluble packaging film can be made with good regularity.

[0029] Refer to the attached Figure 1 and Figure 3 The distance between the film carrier conveyor belt 2 and the liquid distribution roller 3 is less than 0.1 mm, which reduces the overflow of the molten mixture toward the back of the liquid distribution roller 3 and makes the molten mixture flow toward the tensioning roller 5 as much as possible.

[0030] Refer to the attached Figure 1 and Figure 3A perforated air guide plate 8 is horizontally arranged directly below the cooling fan 7. Shovel blades 9 are fixed at both ends of the perforated air guide plate 8. Both sides of the perforated air guide plate 8 are fixed to the steel structure frame by bolts. The blades of the two scrapers 9 are respectively facing the lower arc surfaces of the two tensioning rollers 5. The number of cooling fans 7 is set to three, which are respectively facing the three holes on the perforated air guide plate 8. In this way, the cold air blown out passes through the three holes and can be diffused horizontally to cover a larger area as much as possible. While the perforated air guide plate 8 guides the cold air, the scraper 9 scrapes off the mixed material residue adhering to the two tensioning rollers 5, reducing the workload of manually cleaning the tensioning rollers 5.

[0031] Refer to the attached Figure 1 and Figure 3 Two baffles 10 distributed in an eight-shape are fixed on both sides of the perforated air guide plate 8. The baffles 10 are arranged above the film conveyor belt 2. The cold air is diffused by the inclined surface of the baffle 10 to cover a larger area. At the same time, each cold air is separated so that they flow to the film independently to prevent deviation.

[0032] Refer to the attached Figure 1 and Figure 3 The four corners of the lower surface of the cooling fan 7 are fixed with suspension rods 11, and the ends of the suspension rods 11 away from the cooling fan 7 are fixed to the upper surface of the perforated air guide plate 8. The suspension rods 11 are used to support the cooling fan 7 upward and keep a distance from the perforated air guide plate 8, which is convenient for cleaning the cooling fan 7 and leaves installation space for the perforated air guide plate 8. In particular, the holes of the perforated air guide plate 8 can be equipped with dustproof mesh.

[0033] Refer to the attached Figure 1 and Figure 2 A synchronous belt 12 is provided between the ends of the two tensioning rollers 5 away from the vent 6, and one end of one of the tensioning rollers 5 is connected to a drive motor 13, wherein the film carrier conveyor belt 2 and the liquid distribution roller 3 are driven by two rotating motors respectively. The external heater of the hot melt tank 1 and the two rotating motor drive motors 13 are respectively connected to the industrial computer of the processing station through relay signals, and are uniformly controlled by the program. The drive motor 13 provides power, and the synchronous belt 12 is transmitted between the two tensioning rollers 5 to achieve synchronous rotation and extrude the film.

[0034] Refer to the attached Figure 1 and Figure 2 A cold air duct 14 is axially inserted in the middle of the two vents 6. The outside of the cold air duct 14 is fixed to the steel structure frame by a metal pipe clamp. The air inlet of the cold air duct 14 is connected to the air conditioning fresh air system, which can transport the air-conditioned cold air to the vents 6 to take away the heat of the two tensioning rollers 5 and realize the cooling of the two tensioning rollers 5.

[0035] Refer to the attached Figure 1 and Figure 2A weir 15 is provided at one end of the film carrier conveyor belt 2 away from the tensioning roller 5. The lower end of the weir 15 has a cutting edge parallel to the liquid distribution roller 3. The belt of the film carrier conveyor belt 2 is scraped off through the cutting edge to prevent it from sticking into the tensioning area, thereby improving the safety of film cooling and molding.

[0036] Furthermore, the waste residue scraped off by the cutting edge can be cleaned regularly with tools such as clamps, for example, once per shift, and a work plan can be formulated.

[0037] Furthermore, a slag discharge port can be provided on the flow-blocking weir 15 , so that the waste slag can slide along the inclined surface of the cutting edge toward the slag discharge port, thereby being discharged and separated from the film-carrying conveyor belt 2 .

[0038] The working principle of the present invention is as follows: when working, the discharge port of the hot melt tank 1 is opened to allow the molten mixture to flow to the liquid distributing roller 3 and spread out, and the liquid distributing roller 3 sends the film-shaped molten mixture toward the direction of travel of the film carrier conveyor belt 2. At the same time, the lower surfaces of the two tensioning rollers 5 also rotate toward the direction of travel of the film carrier conveyor belt 2, which can cooperate with the film carrier conveyor belt 2 to extrude the molten mixture and take away the heat of the molten mixture, taking into account the cooling of the molten mixture into a film and two-point tensioning, and then using the cooling fan 7 to blow cold air toward the tensioning area, which facilitates rapid cooling of the film and avoids idle waste of the tensioning area, and the two tensioning rollers 5 block the cold wind to prevent the cold wind from blowing away the molten mixture on the liquid distributing roller 3.

[0039] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. An environmentally friendly water-soluble packaging film manufacturing device, comprising a hot melt tank (1), a film carrier conveyor belt (2) and a liquid dispensing roller (3) arranged in sequence from top to bottom, characterized in that: The hot melt tank (1) is connected to a shovel-type hopper (4), which is in an inclined triangular structure and has a lower port with an arc that fits the outer circle of the liquid-dispensing roller (3). Two mutually parallel tensioning rollers (5) are arranged above the film-carrying conveyor belt (2), and the end faces of the two tensioning rollers (5) are provided with ventilation holes (6). A cooling fan (7) is arranged above the two tensioning rollers (5), and the cooling fan (7) faces the area of ​​the film-carrying conveyor belt (2) between the two tensioning rollers (5).

2. The environmentally friendly water-soluble packaging film manufacturing device according to claim 1, characterized in that: A perforated air guide plate (8) is horizontally arranged directly below the cooling fan (7), and scrapers (9) are fixed at both ends of the perforated air guide plate (8), with the blades of the two scrapers (9) facing the lower arc surfaces of the two tensioning rollers (5) respectively.

3. The device for manufacturing an environmentally friendly water-soluble packaging film according to claim 2, characterized in that: Two baffles (10) distributed in an eight-shaped pattern are fixed on both sides of the hole of the perforated air guide plate (8), and the baffles (10) are both arranged above the film-carrying conveyor belt (2).

4. The device for manufacturing an environmentally friendly water-soluble packaging film according to claim 2, characterized in that: Suspended rods (11) are fixed to the four corners of the lower surface of the heat dissipation fan (7), and the ends of the suspended rods (11) away from the heat dissipation fan (7) are fixed to the upper surface of the air guide plate (8) with holes.

5. The device for manufacturing an environmentally friendly water-soluble packaging film according to claim 1, characterized in that: A synchronous belt (12) is sleeved between the ends of the two tensioning rollers (5) away from the vent (6), and one end of one of the tensioning rollers (5) is transmission-connected to a drive motor (13).

6. The device for manufacturing an environmentally friendly water-soluble packaging film according to claim 1, characterized in that: A cold air pipe (14) is axially inserted between the two ventilation openings (6).

7. The device for manufacturing an environmentally friendly water-soluble packaging film according to claim 1, characterized in that: A flow-blocking weir (15) is provided at one end of the film-carrying conveyor belt (2) away from the tensioning roller (5), and a lower end of the flow-blocking weir (15) has a cutting edge parallel to the liquid-distributing roller (3).

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