A type of integrated machine for sustainable mulching and recycling of plastic film composites

Abstract

This invention relates to the field of agricultural machinery, specifically to an integrated machine for sustainable mulching and recycling of plastic film composites. It includes a main frame, a plastic film guide mounted on the main frame, a drying and impurity removal device, a plastic film impurity removal device, a plastic film recycling and rolling device, a recycling film roll placement rack, and a plastic film composite covering device. The plastic film guide includes a guide shell mounted on the main frame, guide support rods, and a film conveying guide belt and a plastic film slide rod mounted on the guide shell. The drying and impurity removal device includes an air compressor and two air channels mounted on the main frame. The plastic film impurity removal device includes a shell mounted on the main frame and a main body of the device installed inside the shell. The main body includes a vibration impurity removal device, a drive shaft, a slide rod, three sets of silicone scrapers, and a cleaning brush. This invention can significantly improve the mechanization level and operational efficiency of sustainable mulching cultivation technology.

Description

Technical Field

[0001] This invention relates to the field of agricultural machinery, specifically to an integrated machine for sustainable mulching and recycling of plastic film composites. Background Technology

[0002] Currently, mulching for dryland maize is one of the important cultivation measures for maize production in rainfed dryland areas. While mulching brings positive effects such as increased yield, the stable molecular structure of polyethylene makes ordinary mulch film difficult to decompose naturally in farmland. After cultivation, mulch film fragments left in the field can damage the soil environment, affecting crop seed germination, hindering root growth, and producing microplastics, among other negative effects. While biodegradable mulch film can effectively solve the problem of mulch film residue pollution caused by ordinary mulching, it is easily affected by the environment, and its actual coverage period often fails to meet the needs of agricultural production. Furthermore, using biodegradable mulch film alone is more expensive than using ordinary mulch film. Composite strip mulch film, which combines the features of ordinary and biodegradable mulch film, is prone to cracking at the junction of the two materials due to their different molecular structures, thus losing its covering function. Some composite strip mulch films also crack between the strips during the mulching process, limiting their application in production.

[0003] The sustainable mulch film cultivation technology uses a combination of narrow-width ordinary mulch film and biodegradable mulch film for mulching. Fertilizer is applied through biodegradable mulch film strips while ordinary mulch film strips are left unfertilized. Crops are planted on the biodegradable mulch film strips, keeping the ordinary mulch film strips intact. This effectively utilizes the good water and heat retention function of ordinary mulch film and the water and heat regulation function of biodegradable mulch film. Compared with ordinary mulch film mulching, it significantly reduces mulch film residue in farmland, simplifies the recycling of ordinary mulch film, facilitates reuse, and significantly reduces the amount of mulch film and fertilizer used and input costs. However, currently there is no supporting machinery that integrates mulch film mulching and recycling, which affects the mechanization level and efficiency of the sustainable mulch film cultivation technology. Summary of the Invention

[0004] To address the aforementioned issues, this invention provides an integrated machine for sustainable mulching and recycling of plastic film composites, which can significantly improve the mechanization and operational efficiency of sustainable mulching cultivation technology.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A sustainable mulch film recycling and mulching integrated machine includes a main frame, a mulch film guide frame installed on the main frame, an air drying and impurity removal device, a mulch film impurity removal device, a mulch film recycling and rolling device, a recycling film roll placement rack, and a mulch film composite covering device.

[0007] The mulch film guide frame includes a guide frame housing, guide frame support rods, and a mulch film conveying guide belt and a mulch film slide rod mounted on the guide frame housing. The guide frame housing is mounted on the main frame via the guide frame support rods. A mulch film guide clamp is installed on the mulch film conveying guide belt, and a transmission mechanism is installed at each of the upper and lower ends. The mulch film guide clamp is equipped with a silicone film clamp (the silicone material is to prevent the clamp from damaging the mulch film) for clamping the head of the mulch film. A set of transmission mechanisms drives the mulch film guide clamp holding the mulch film to be conveyed from the ground surface towards the transmission mechanism above, and drives the empty mulch film guide clamp to be conveyed from the transmission mechanism above towards the ground surface. The mulch film slide rod is a sleeve structure, with the middle rod fixed and the outer sleeve moving with the direction of the mulch film, serving to support and slide the mulch film.

[0008] The air-drying and impurity removal device includes an air compressor and two air ducts installed on the main frame. One end of each air duct is connected to the air outlet of the air compressor, and the other end is respectively equipped with a No. 1 air-drying port and a No. 2 air-drying port. The air compressor draws in air through the air inlet, compresses the air, and then transports it to the No. 1 and No. 2 air-drying ports. The air is then rapidly sprayed out from the No. 1 and No. 2 air-drying ports to air-dry both the upper and lower surfaces of the recycled mulch film on the mulch film guide frame, while simultaneously air-drying and removing loosely adhered impurities from the film surface.

[0009] The mulch film removal device includes an outer shell mounted on a main frame and a main body of the mulch film removal device installed inside the outer shell. The main body of the mulch film removal device includes a vibrating removal device, a drive shaft, a slide rod, three sets of silicone scrapers, and a cleaning brush. The mulch film is transported to the drive shaft inside the mulch film removal device by a film conveyor belt mounted on a mulch film guide frame, and then conveyed to the slide rod by the drive shaft. During the conveying process to the slide rod, the vibrating removal device vibrates up and down to remove impurities such as soil. The mulch film moves upward through the drive shaft and slide rod to the outlet of the outer shell. During this process, the three sets of silicone scrapers remove tightly attached impurities from the mulch film. A set of vertically linked cleaning brushes is provided between the first set of silicone scrapers and the second set of silicone scrapers to clean up impurities such as soil and dust.

[0010] The plastic film recycling and rolling device includes a main body installed on the main frame. After the plastic film passes through the outlet of the outer shell, it is rolled onto the replaceable rolling drum of the recycling and rolling device. The rolling drum is driven by mechanical movement to roll the plastic film onto the rolling drum. The plastic film recycling and rolling device is equipped with a weight sensor. When the weight of the recycled plastic film reaches the set value or a piece of plastic film is rolled up, the plastic film is cut by the plastic film cutter, and the plastic film is naturally recycled. Then the rolling drum is replaced to continue recycling plastic film until the plastic film is recycled.

[0011] The composite mulch film covering device includes a pressing soil lifting device, a shallow rotary tillage machine, a composite mulch film covering device, a joint covering mechanism, a pressing plow, and a pressing wheel, all installed sequentially on the main frame. The composite mulch film covering device is equipped with two sets of covering devices, and each set of covering devices can be replaced with 2 or 3 covering devices as needed. The two sets of covering devices are installed in opposite directions.

[0012] The edge-pressing soil is transported from the farmland to the joint covering mechanism via an edge-pressing soil lifting device. The joint covering mechanism then covers the joint between the polyethylene mulch film and the biodegradable mulch film to prevent the joint from opening or being blown open by the wind, thus affecting the operation. A shallow rotary tillage machine is connected after the edge-pressing soil lifting device to level the ground, which facilitates the laying of the mulch film. After the mulch film is covered, the edge-pressing plow buries the edge of the mulch film in the soil, and the rolling roller compacts the edge to prevent the mulch film from being blown away by the wind.

[0013] Furthermore, when the membrane conveyor belt transports the mulch film from the bottom to the upper drive, the membrane guide clamp opens. After the membrane conveyor belt travels from the top to the lower drive and touches the mulch film, the membrane guide clamp closes, holding the head of the mulch film and reciprocating to transport the mulch film.

[0014] Furthermore, the recycled plastic film is placed on a recycling film roll placement rack, which is located between the plastic film recycling and rolling device and the edge soil lifting device.

[0015] Furthermore, the main body of the plastic film recycling and rolling device includes a main body shell, a plastic film recycling and rolling device, an adjustable weight sensor, a plastic film recycling and rolling diameter limiter, and a plastic film cutter. The plastic film recycling and rolling device adopts a detachable and replaceable film rolling drum. The rolling drum is connected to the main body of the rolling device through a film rolling shaft with a limit slot and a pressure and weight transmission sensor. The plastic film cutter is set on the film rolling shaft. When the pressure and weight transmission sensor reaches the set value and issues a command, the film rolling shaft stops rotating, and the plastic film cutter works to cut the plastic film.

[0016] The present invention has the following beneficial effects:

[0017] This invention can complete the following operations in one go: plastic film recycling, shallow rotary tillage, shallow straw mulching, composite mulching of biodegradable plastic film and ordinary plastic film, and soil covering. It can ensure the integrated operation of plastic film composite mulching and recycling, and has good effects on plastic film recycling, composite mulching, and reduction of plastic film residue. It can meet the requirements of reducing the application cost of biodegradable plastic film and 100% recycling of ordinary plastic film, and can provide a basic guarantee for sustainable mechanized mulching of plastic film composite.

[0018] In practical applications, the aforementioned sustainable mulch film recycling and composite mulching require separate operations. Simultaneously, strip fertilization is applied over previously planted biodegradable mulch film strips. When applying biodegradable mulch film in these separate operations, it must accurately cover the previously planted strips. However, positioning is difficult after rotary tillage in farmland, making it extremely difficult to control the biodegradable mulch film to accurately cover the previously planted strips. This invention can complete the recycling of ordinary mulch film strips and the accurate covering of biodegradable mulch film strips in a single operation. Attached Figure Description

[0019] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of the structure of an integrated machine for sustainable mulching and recycling of plastic film composites according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of the guide frame housing in an embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the connection structure between the guide frame support rod and the mulch film slide rod in an embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the structure of the diaphragm conveyor belt in an embodiment of the present invention.

[0024] Figure 5 This is a schematic diagram of the diaphragm guide clip in an embodiment of the present invention.

[0025] Figure 6 This is a schematic diagram of the air-drying and impurity removal device in an embodiment of the present invention.

[0026] Figure 7 This is a schematic diagram of the structure of the plastic film removal device in an embodiment of the present invention.

[0027] Figure 8 This is a schematic diagram of the structure of the plastic film recycling and rolling device in an embodiment of the present invention.

[0028] Figure 9 This is a schematic diagram of three different arrangements of the covering device in an embodiment of the present invention. Detailed Implementation

[0029] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention. These all fall within the scope of protection of the present invention.

[0030] like Figures 1-8 As shown, an embodiment of the present invention provides a sustainable mulch film composite covering and recycling integrated machine, which includes a main frame 1, a mulch film guide frame 2 installed on the main frame, an air drying and impurity removal device 4, a mulch film impurity removal device 6, a mulch film recycling and rolling device 7, a recycling film roll placement rack 14, and a mulch film composite covering device.

[0031] The mulch film guide frame 2 includes a guide frame housing 21, a guide frame support rod 22, and a mulch film conveying guide belt 23 and a mulch film slide rod 24 mounted on the guide frame housing 21. The guide frame housing 21 is mounted on the main frame 1 via the guide frame support rod 22. A mulch film guide clamp 231 is mounted on the mulch film conveying guide belt 23, and a transmission mechanism is mounted at both the upper and lower ends. The mulch film guide clamp 231 is equipped with a silicone film clamp head (the silicone material is used to prevent the clamp head from damaging the mulch film) for clamping the head of the mulch film 14. A set of transmission mechanisms 25 drives the mulch film guide clamp 231 holding the mulch film to be conveyed from the ground surface to the transmission mechanism 25 above, and drives the empty mulch film guide clamp 231 to be conveyed from the transmission mechanism 25 above to the ground surface. The mulch film slide rod 24 is a sleeve structure, with the middle rod fixed and the outer sleeve moving with the direction of the mulch film, playing the role of supporting and sliding the mulch film.

[0032] The air-drying and impurity removal device 4 includes an air compressor 41 and two air channels 42 installed on the main frame. One end of each air channel 42 is connected to the air outlet of the air compressor 41, and the other end is respectively equipped with a first air-drying port 3 and a second air-drying port 5. The air compressor draws in air through the air inlet 43, and after compression, the air is transported to the first air-drying port 3 and the second air-drying port 5 through the air channels 42. The air is then rapidly sprayed out from the first air-drying port and the second air-drying port to air-dry the upper and lower surfaces of the recycled mulch film on the mulch film guide frame 2, and at the same time, air-drying and removing impurities that are not tightly adhered to the film surface.

[0033] The mulch film removal device 6 includes a housing 66 mounted on a main frame and a main body of the mulch film removal device mounted inside the housing 66. The main body of the mulch film removal device includes a vibration removal device 61, a drive shaft 62, a slide bar 63, three sets of silicone scrapers 64, and a cleaning brush 65. The mulch film 14 is transported to the drive shaft 62 inside the mulch film removal device 6 by a film conveyor belt 23 mounted on the mulch film guide frame 2. The drive shaft 62 then transmits the mulch film 14 to the slide bar 63. During the transmission to the slide bar 63, the vibration removal device 61 vibrates up and down to remove impurities such as soil. The mulch film 14 moves upward to the outlet of the housing 66 via the drive shaft 62 and the slide bar 63. During this process, the three sets of silicone scrapers 64 remove tightly attached impurities from the mulch film 14. A set of vertically linked cleaning brushes 65 is provided between the first set of silicone scrapers and the second set of silicone scrapers to clean up impurities such as soil and dust.

[0034] The plastic film recycling and rolling device 7 includes a main body mounted on the main frame. After the plastic film passes through the outlet of the outer shell, it is rolled onto a replaceable rolling drum 71 of the recycling and rolling device. The rolling drum is driven by mechanical movement to roll the plastic film onto the rolling drum 71. The plastic film recycling and rolling device is equipped with a weight sensor 72. When the weight of the recycled plastic film reaches a set value or a roll of plastic film is completed, the plastic film is cut by the plastic film cutter 73, and the plastic film recycling is completed naturally. Then the rolling drum is replaced to continue recycling plastic film until the plastic film recycling is completed. The recycled plastic film can be placed on the recycling film roll placement rack, which is located between the plastic film recycling and rolling device and the edge soil lifting device.

[0035] The composite mulch film covering device includes a pressing soil lifting device 8, a shallow rotary tillage machine 9, a composite mulch film covering device 10, a joint covering soil mechanism 11, a pressing plow 12, and a pressing wheel 13, all installed sequentially on the main frame. The composite mulch film covering device 10 has two sets of covering devices. Each set of covering devices can be replaced with 2-panel or 3-panel covering devices as needed. The two sets of covering devices are installed in opposite directions. Taking a 2-panel covering device as an example, in the first set, covering device 1 is on the left and covering device 2 is to the right rear of covering device 1. In the second set, covering device 1 is on the right and covering device 2 is to the left rear of covering device 1. When it is necessary to lay a composite of 1 biodegradable mulch film and 1 polyethylene mulch film, a 2-panel composite mulch film covering device is used. The biodegradable mulch film is installed on the No. 1 frame and the polyethylene mulch film is installed on the No. 2 frame. The biodegradable mulch film is laid first and the polyethylene mulch film is laid later. The edge of the polyethylene mulch film covers the edge of the biodegradable mulch film. When the machinery using the first set of covering devices needs to change direction at the end of the field, it is switched to the second set of covering devices to ensure that the edge of the polyethylene mulch film always covers the biodegradable mulch film.

[0036] The edge soil is lifted from the farmland to the joint covering mechanism 11 by the edge soil lifting device 8. The joint covering mechanism 11 covers the joint of the polyethylene film and the biodegradable film to prevent the joint from opening or being blown open by the wind, which would affect the operation. The edge soil lifting device 8 is connected to a shallow rotary tillage machine 9. The shallow rotary tillage machine 9 flattens the ground to facilitate the laying of the film. After the film is covered, the edge of the film is buried in the soil by the edge plow and the edge is compacted by the roller to prevent the film from being blown away by the wind.

[0037] In this embodiment, when the membrane conveyor belt 23 conveys the mulch film from the bottom to the upper drive, the membrane guide clamp 231 opens. After the membrane conveyor belt 23 moves from the top to the lower drive and touches the mulch film, the membrane guide clamp 231 closes, holding the head of the mulch film 14 and conveying the mulch film back and forth.

[0038] In this embodiment, the plastic film guide frame can be set according to usage requirements. Different guide frames can be set up, such as 1 set or 2 sets, or only 1 set of guide frames can be set up, and the left and right sides can be set up according to the requirements.

[0039] In this specific implementation, the plastic film to be recycled is first placed on the plastic film guide frame using clips. The guide frame's drive mechanism pulls the film to the drying and impurity removal device. An air compressor draws in air through the inlet, compresses it, and then delivers it through the air duct to drying ports one and two. The air is then rapidly sprayed from these ports to dry both sides of the recycled film on the guide frame, simultaneously removing loosely adhered impurities. The film then enters the impurity removal device via a drive shaft. During its transport to the slide bar, the vibrating impurity removal device vibrates back and forth to remove soil and other impurities. The film then... The drive shaft and slide rod move upwards to the outlet of the outer casing. During this process, three sets of silicone scrapers remove tightly adhered impurities from the mulch film. Between the first and second sets of silicone scrapers, there is a set of vertically linked cleaning brushes used to clean dirt, dust, and other impurities. After the mulch film passes through the outlet of the outer casing, it is wound onto a replaceable winding drum of the recycling and winding device. The mechanical movement drives the winding drum to rotate, winding the mulch film onto the drum. The mulch film recycling and winding device is equipped with a weight sensor. When the weight of the recycled mulch film reaches the set value or a roll of mulch film is completed, the mulch film is cut by a cutter, and the mulch film is naturally recycled. Then, the winding drum is replaced to continue recycling the mulch film until all the mulch film is recycled.

[0040] While recycling the plastic film, a composite covering operation of biodegradable plastic film and polyethylene plastic film is carried out. Two composite plastic film covering devices are used. The biodegradable plastic film is installed on frame 1 and the polyethylene plastic film is installed on frame 2. The biodegradable plastic film is laid first and the polyethylene plastic film is laid later. The edge of the polyethylene plastic film covers the edge of the biodegradable plastic film. When the machine using the first covering device needs to change direction at the end of the field, it is switched to the second covering device to cover, so that the edge of the polyethylene plastic film always covers the biodegradable plastic film. The edge-pressing soil is transported from the farmland to the joint covering mechanism via an edge-pressing soil lifting device. The joint covering mechanism then covers the joint between the polyethylene mulch film and the biodegradable mulch film, preventing the joint from opening or being blown away by the wind, which would affect the operation. A shallow rotary tillage machine is connected after the edge-pressing soil lifting device. The shallow rotary tillage machine levels the ground to facilitate the laying of the mulch film. After the mulch film is covered, the edge-pressing plow buries the edge of the mulch film in the soil, and the rolling roller compacts the edge to prevent the mulch film from being blown away by the wind. This achieves accurate coverage of ordinary mulch film strips and biodegradable mulch film strips in one operation.

[0041] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A composite sustainable mulch film recycling machine, characterized in that: It includes a main frame, a plastic film guide frame installed on the main frame, an air-drying and impurity removal device, a plastic film impurity removal device, a plastic film recycling and rolling device, a recycling film roll placement rack, and a plastic film composite covering device; The mulch film guide frame includes a guide frame housing, guide frame support rods, and a mulch film conveying guide belt and a mulch film sliding rod mounted on the main frame. The guide frame housing is mounted on the main frame via the guide frame support rods. A mulch film guide clamp is installed on the mulch film conveying guide belt, and a transmission mechanism is installed at each of the upper and lower ends. The mulch film guide clamp is equipped with a silicone mulch film clamp for holding the mulch film head. A set of transmission mechanisms drives the mulch film guide clamp holding the mulch film to be conveyed from the ground surface towards the transmission mechanism above, and drives the empty mulch film guide clamp to be conveyed from the transmission mechanism above towards the ground surface. The mulch film sliding rod is a sleeve structure, with the middle rod fixed and the outer sleeve moving with the direction of the mulch film, serving to support and slide the mulch film. The air drying and impurity removal device includes an air compressor and two air ducts installed on the main frame. One end of each air duct is connected to the air outlet of the air compressor, and the other end is respectively equipped with a No. 1 air drying port and a No. 2 air drying port. The air compressor draws in air through the air inlet, compresses the air, and then transports it through the air ducts to the No. 1 air drying port and the No. 2 air drying port. The No. 1 air drying port and the No. 2 air drying port spray the air at high speed onto the upper and lower surfaces of the recycled mulch film on the mulch film guide frame. The mulch film removal device includes a housing mounted on a main frame and a main body of the mulch film removal device installed inside the housing. The main body of the mulch film removal device includes a vibration removal device, a drive shaft, a slide rod, three sets of silicone scrapers, and a cleaning brush. The mulch film is transported to the drive shaft inside the mulch film removal device by a film conveyor belt mounted on a mulch film guide frame, and then conveyed to the slide rod by the drive shaft. During the conveying process to the slide rod, the vibration removal device vibrates up and down to remove impurities. Then, the mulch film moves upward to the outlet of the housing via the drive shaft and the slide rod. During this process, the three sets of silicone scrapers remove tightly attached impurities from the mulch film. A set of vertically linked cleaning brushes is provided between the first set of silicone scrapers and the second set of silicone scrapers for cleaning impurities. The plastic film recycling and rolling device includes a main body installed on the main frame. After the plastic film passes through the outlet of the outer shell, it is rolled onto a replaceable rolling drum of the recycling and rolling device. The rolling drum is driven by mechanical movement to roll the plastic film onto the rolling drum. The plastic film recycling and rolling device is equipped with a weight sensor. When the weight of the recycled plastic film reaches a set value or a roll of plastic film is completed, the plastic film is cut by the plastic film cutter, and the plastic film recycling is completed naturally. Then the rolling drum is replaced to continue recycling plastic film until the plastic film recycling is completed. The composite mulch film covering device includes a soil lifting and conveying device, a shallow rotary tillage machine, a composite mulch film covering device, a joint covering mechanism, a soil pressing plow, and a pressing wheel, all installed sequentially on the main frame. The composite mulch film covering device has two sets of covering devices, each set consisting of two covering devices, installed in opposite directions. In the first set, the No. 1 cover frame is on the left, and the No. 2 cover frame is to the right rear of the No. 1 cover frame. In the second set, the No. 1 cover frame is on the right, and the No. 2 cover frame is to the left rear of the No. 1 cover frame. When it is necessary to lay a composite of 1 biodegradable mulch film and 1 polyethylene mulch film, the biodegradable mulch film is installed on the No. 1 cover frame, and the polyethylene mulch film is installed on the No. 2 cover frame. The biodegradable mulch film is laid first, followed by the polyethylene mulch film, with the edge of the polyethylene mulch film covering the edge of the biodegradable mulch film. The edge-pressing soil is transported from the farmland to the joint covering mechanism via an edge-pressing soil lifting device. The joint covering mechanism then covers the joint between the polyethylene mulch film and the biodegradable mulch film to prevent the joint from opening or being blown open by the wind, thus affecting the operation. A shallow rotary tillage machine is connected after the edge-pressing soil lifting device to level the ground, which facilitates the laying of the mulch film. After the mulch film is covered, the edge-pressing plow buries the edge of the mulch film in the soil, and the rolling roller compacts the edge to prevent the mulch film from being blown away by the wind. When the membrane conveyor belt transports the mulch film from the bottom to the upper drive machine, the membrane guide clamp opens. After the membrane conveyor belt moves from the top to the lower drive machine and touches the mulch film, the membrane guide clamp closes, holding the head of the mulch film and reciprocating to transport the mulch film. The recycled plastic film is placed on the recycling film roll placement rack, which is located between the plastic film recycling and rolling device and the edge soil lifting device. The main body of the plastic film recycling and rolling device includes a main body shell, a plastic film recycling and rolling device, an adjustable weight sensor, a plastic film recycling and rolling diameter limiter, and a plastic film cutter. The plastic film recycling and rolling device adopts a detachable and replaceable film rolling drum. The rolling drum is connected to the main body of the rolling device through a film rolling shaft with a limit slot and a pressure and weight transmission sensor. The plastic film cutter is set on the film rolling shaft. When the pressure and weight transmission sensor issues a command when the set value is reached, the film rolling shaft stops rotating, and the plastic film cutter works to cut the plastic film.

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