A plastic film heat-sealing device

Abstract

The present invention discloses a plastic film thermal sealing device, which includes an installation component, a power component, a first safety door component, a second safety door component, and a sealing rod component. The installation component includes installation side plates and a housing. There is a channel in the middle of the housing. The first safety door components are respectively arranged at the top and bottom of the above-mentioned channel. The first safety door component arranged at the top of the channel is connected to the above-mentioned power component. The second safety door components are respectively arranged at the top and bottom of the above-mentioned channel. The second safety door component arranged at the top of the channel is connected to the power component. The sealing rod components are respectively arranged at the top and bottom of the above-mentioned channel. The sealing rod component arranged at the top of the channel is connected to the power component. One use of an embodiment of the present invention is to avoid scalding workers, improve safety, and reduce the labor intensity of workers in stretching and fixing plastic films.

Description

Technical Field

[0001] The present disclosure generally relates to the field of plastic sealing, and more particularly to a plastic film thermal sealing device. Background Art

[0002] Plastic films are films made of polyvinyl chloride, polyethylene, polypropylene, polystyrene, and other resins, which are used for packaging and as a coating layer. Plastic packaging and plastic packaging products are taking up an increasingly large share in the market. Especially composite plastic flexible packaging has been widely applied in the fields of food, medicine, chemical industry, etc., among which food packaging accounts for the largest proportion, such as beverage packaging, frozen food packaging, cooked food packaging, fast food packaging, etc. Currently, heat sealing is required for sealing the interfaces during the use of plastic films.

[0003] A heat sealer is a device that uses various external conditions to heat the sealing part of a plastic film to a viscous flow state, and with a certain pressure, fuses two layers of the film into one body, which maintains a certain strength and sealing performance after cooling.

[0004] Traditional vertical plastic heat sealers usually adopt upper and lower hot melt pressing rods. The lower hot melt pressing rod is fixed on the machine frame, and the upper hot melt pressing rod is connected to a transmission cylinder. When the plastic film to be processed and fused passes between the upper and lower hot melt pressing rods, the transmission cylinder pushes the upper hot melt pressing rod to the lower hot melt pressing rod to press the plastic film. At this time, the two hot melt pressing rods heat up to melt the plastic film, so that two or more layers of plastic films can be hot melt pressed together. However, in the actual use process, when hot melt pressing the plastic film, workers need to straighten both sides of the plastic film and then insert it between the upper and lower hot melt pressing rods to ensure that the hot melt - formed plastic bags are more regular and beautiful. However, since the upper and lower hot melt pressing rods are completely exposed, there is a risk of scalding during the process of workers hot melting the plastic film. Moreover, in industrial production, workers stretch the plastic film for a long time, resulting in a relatively high labor intensity. At the same time, the existing technical solutions are difficult to cooperate with other devices, thus it is difficult to achieve production automation and the applicable range is relatively narrow. Summary of the Invention

[0005] An object of an embodiment of the present invention is to provide a plastic film thermal sealing device to avoid scalding workers, improve safety, and reduce the labor intensity of workers for stretching and fixing the plastic film.

[0006] In one aspect, a plastic film thermal sealing device is described, including a mounting component, which includes mounting side plates and a housing. The middle of the housing has a channel that runs through from the front to the back of the housing, through which the material to be sealed can pass. The mounting side plates are fixedly installed on both sides inside the above-mentioned housing; a power component, which is arranged at the upper part inside the above-mentioned housing and is fixedly connected to the mounting side plates; a first safety door component, which is respectively arranged at the top and bottom of the above-mentioned channel. The first safety door components arranged at the top and bottom of the channel are arranged oppositely. The first safety door component arranged at the top of the channel can slide vertically relative to the housing, and the first safety door component arranged at the top of the channel is driven by the power component to slide vertically. The first safety door component arranged at the bottom of the channel is fixedly installed with the above-mentioned housing; a second safety door component, which is arranged parallel to the above-mentioned first safety door component on the back side of the first safety door component. The second safety door component is respectively arranged at the top and bottom of the above-mentioned channel. The first safety door components arranged at the top and bottom of the channel are arranged oppositely. The second safety door component arranged at the top of the channel can slide vertically relative to the housing, and the second safety door component arranged at the top of the channel is driven by the power component to slide vertically. The second safety door component arranged at the bottom of the channel is fixedly installed with the above-mentioned housing; and a sealing rod component, configured to heat-seal the plastic film, which is arranged between the above-mentioned first safety door component and the second safety door component. The sealing rod components are respectively arranged at the top and bottom of the above-mentioned channel. The sealing rod components arranged at the top and bottom of the channel are arranged oppositely. The sealing rod component arranged at the top of the channel is driven by the above-mentioned power component to slide vertically, and the sealing rod component arranged at the bottom of the channel is fixedly installed with the above-mentioned housing.

[0007] The sealing rod component includes a supporting aluminum plate; a heating wire, which is arranged on the side of the supporting aluminum plate close to the material to be sealed; a heating wire fixing component, configured to fix the above-mentioned heating wire on the surface of the supporting aluminum plate, and the heating wire fixing component is arranged on both sides of the supporting aluminum plate.

[0008] The power component includes a fixing rod, which is fixedly installed at the top inside the above-mentioned side mounting plate; and a first power component, which is fixedly installed at the bottom of the above-mentioned fixing rod. The first power component is connected to the supporting aluminum plate of the sealing rod component arranged at the top of the channel.

[0009] The first safety door component includes a first safety door plate; and a first flexible part, which is fixedly installed at the part of the first safety door plate close to the material side; the second safety door component includes a second safety door plate; and a second flexible part, which is fixedly installed at the part of the second safety door plate close to the material side.

[0010] The power assembly further includes a mounting plate fixedly mounted on the main body of the first power component; a second power component fixedly mounted on the upper surface of the mounting plate, and an output end of the second power component is connected to a second safety door plate of the second safety door assembly provided at the top of the channel; and a third power component fixedly mounted on the upper surface of the mounting plate, and an output end of the third power component is connected to a first safety door plate of the first safety door assembly provided at the top of the channel.

[0011] To prevent the plastic film from sticking to the heating wire during the heat sealing process, preferably, the sealing rod assembly in the present invention further includes a Teflon cloth wrapped around the outer surface of the heating wire. The Teflon tape has a smooth surface, good anti-sticking property, chemical corrosion resistance, high temperature resistance and excellent insulation performance. By pasting the Teflon cloth on the outer surface of the heating wire, the corrosion resistance of the heating wire can be improved, and at the same time, during the heat sealing process, it can prevent the plastic film from sticking to the heating wire and being difficult to clean.

[0012] To avoid damaging the plastic film during the heat sealing process, preferably, a silica gel pad is provided between the heating wire and the supporting aluminum plate. The force generated when the slidable sealing rod assembly provided at the top of the channel contacts the sealing rod assembly provided at the bottom of the channel is reduced under the buffering action of the silica gel pad, which can avoid damaging the plastic film due to excessive pressure during the heat sealing process.

[0013] To prevent the sealing rod assembly provided at the top of the channel from shifting during the vertical sliding process, the power assembly further includes a guide rail fixedly mounted on the outer side surface of the mounting side plate; and a connecting portion fixedly mounted on both sides of the supporting aluminum plate of the sealing rod assembly provided at the top of the channel, and the connecting portion is connected to the guide rail through a slider. The sealing rod provided at the top of the channel slides vertically along the direction of the guide rail. By guiding the vertical sliding of the sealing rod assembly through the guide rail, it can avoid the sealing rod assembly from shifting during the sliding process and improve the movement accuracy.

[0014] To prevent the first installation door assembly and the second safety door assembly provided at the top of the channel from shifting during sliding, the power assembly further includes two sets of connecting rods respectively connected to the above-mentioned first safety door panel and second safety door panel. One end of each connecting rod away from the above-mentioned first and second safety door panels penetrates through the installation plate upward, and a limiting portion is installed at this end to connect the connecting rods connected to different safety door panels. The connecting rods guide the vertical sliding of the first safety door assembly and the second safety door assembly provided at the top of the channel, which can prevent the first installation door assembly and the second safety door assembly provided at the top of the channel from shifting during sliding. At the same time, when the first installation door assembly and the second safety door assembly provided at the top of the channel slide to the maximum stroke, the limiting portion forms an interface with the installation plate, preventing the first installation door assembly and the second safety door assembly provided at the top of the channel from continuing to slide, restricting the movement stroke of the first installation door assembly and the second safety door assembly provided at the top of the channel, avoiding over-stroke movement of the first installation door assembly and the second safety door assembly provided at the top of the channel, and improving safety.

[0015] To improve the automation degree of the equipment, preferably, the equipment further includes a control panel for controlling the operation of the above-mentioned power assembly, setting heating parameters, and pressing time. The control panel is fixedly installed on the outer surface of the above-mentioned housing. By setting the operating parameters of the heat-sealing equipment through the control panel and controlling the operation of the equipment according to the parameters, the intelligent degree of the equipment is improved, making the equipment more convenient to operate.

[0016] The present invention has the following advantages:

[0017] Before the sealing rod assembly slides down, the power assembly first drives the front and rear safety door assemblies to slide vertically to seal the front and rear sides of the channel. The safety door assemblies press and fix the plastic film, thus avoiding the staff from stretching and tightening the plastic film for a long time and at high frequencies to fix the plastic film, reducing the labor intensity. Subsequently, the power assembly drives the sealing rod assembly to slide vertically in the sealed space formed by the safety door assembly and the housing to heat-seal the plastic film, realizing the safe advancement of the plastic film heat-sealing work and improving the safety of the plastic film heat-sealing.

[0018] Pasting the Teflon cloth on the outer surface of the heating wire can improve the corrosion resistance of the heating wire. At the same time, during the heat-sealing process, it can prevent the plastic film from adhering to the heating wire during the heat-sealing process, which is difficult to clean.

[0019] When the slidable sealing rod assembly provided at the top of the channel contacts the sealing rod assembly provided at the bottom of the channel, the generated force is reduced under the buffering action of the silicone pad, which can avoid damaging the plastic film due to excessive pressure during the heat-sealing process.

[0020] The connecting rod guides the vertical sliding of the first safety door assembly and the second safety door assembly provided at the top of the passage, which can prevent the first installation door assembly and the second safety door assembly provided at the top of the passage from shifting during the sliding process. At the same time, when the first installation door assembly and the second safety door assembly provided at the top of the passage slide to the maximum stroke, the limiting portion forms an interface with the mounting plate, preventing the first installation door assembly and the second safety door assembly provided at the top of the passage from continuing to slide, restricting the movement stroke of the first installation door assembly and the second safety door assembly provided at the top of the passage, avoiding the over-stroke movement of the first installation door assembly and the second safety door assembly provided at the top of the passage, and improving safety.

[0021] The operating parameters of the heat-sealing device are set through the control panel, and the operation of the device is controlled according to the parameters, which improves the intelligence level of the device and makes the device more convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Illustrates a first structural schematic diagram of the heat-sealing device;

[0023] Figure 2 Illustrates Figure 1 A second structural schematic diagram of the heat-sealing device shown;

[0024] Figure 3 Illustrates Figure 1 An internal structural schematic diagram of the heat-sealing device shown;

[0025] Figure 4 Illustrates Figure 3 A schematic diagram of the sealing rod assembly descending in the heat-sealing device shown;

[0026] Figure 5 Illustrates Figure 3 A schematic diagram of the safety door assembly descending in the heat-sealing device shown;

[0027] Figure 6 Illustrates Figure 3 A schematic diagram of the sealing rod assembly and the safety door assembly descending in the heat-sealing device shown;

[0028] Figure 7 Illustrates Figure 1 A structural schematic diagram of the sealing rod assembly in the heat-sealing device shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application and should not be construed as a limitation of the present application.

[0030] In this document, relational terms such as first and second are used solely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device.

[0031] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, further definition and explanation thereof is not required in subsequent figures. In the description of the present invention, the terms "first", "second", etc. are used only for descriptive distinction and should not be construed as indicating or implying relative importance.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "arranged", "connected" and "coupled" shall be construed broadly. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention may be understood according to specific circumstances.

[0033] Reference will now be made specifically to representative embodiments shown in the drawings. It should be understood that the following description is not intended to limit the embodiments to one preferred embodiment. On the contrary, it is intended to cover alternative forms, modifications and equivalents that may be included within the spirit and scope of the described embodiments as defined by the appended claims.

[0034] Figure 1 、 2 An example of a plastic film heat-sealing device that can be improved by incorporating embodiments of the present invention is illustrated. Like the other appended Figure 1 drawings, this drawing is shown for illustrative purposes and does not limit the possible embodiments or claims of the present invention.

[0035] The attached drawing includes an installation component 400, a power component 500, a first safety door component 100, a second safety door component 300, and a sealing rod component 200. The installation component 400 includes installation side plates 406 and a housing 403. There is a channel 407 in the middle of the housing 403 that penetrates from the front of the housing to the back of the housing 403, and the material to be sealed can pass through this channel 407. The installation side plates 406 are fixedly installed on both sides inside the above-mentioned housing 403. The power component 500 is arranged in the upper part inside the above-mentioned housing 403 and is fixedly connected to the installation side plates 406. The first safety door components 100 are respectively arranged at the top and bottom of the above-mentioned channel 407. The first safety door components 100 arranged at the top and bottom of the channel 407 are arranged opposite to each other. The first safety door component 100 arranged at the top of the channel 407 is connected to the above-mentioned power component 500, and the first safety door component 100 arranged at the bottom of the channel 407 is fixedly installed with the above-mentioned housing 403. The second safety door component 300 is arranged parallel to the above-mentioned first safety door component 100 on the back side of the first safety door component 100. The second safety door components 300 are respectively arranged at the top and bottom of the above-mentioned channel 407. The first safety door components 300 arranged at the top and bottom of the channel are arranged opposite to each other. The second safety door component 300 arranged at the top of the channel is connected to the power component 500, and the second safety door component 300 arranged at the bottom of the channel 407 is fixedly installed with the above-mentioned housing 403. The sealing rod component 200 is arranged between the above-mentioned first safety door component 100 and the second safety door component 300. The sealing rod components 200 are respectively arranged at the top and bottom of the above-mentioned channel 407. The sealing rod components 200 arranged at the top and bottom of the channel 407 are arranged opposite to each other. The sealing rod component 200 arranged at the top of the channel is connected to the power component 500, and the sealing rod component 200 arranged at the bottom of the channel 407 is fixedly installed with the above-mentioned housing 403.

[0036] As Figure 7 shown, the sealing rod component 200 includes a support aluminum plate 201, a heating wire 204, and a heating wire fixing component 206. The heating wire 204 is fixedly installed on the side of the support aluminum plate 201 close to the material to be sealed. The heating wire fixing component 206 is arranged on both sides of the support aluminum plate 201, and the above-mentioned heating wire 204 is fixed on the surface of the support aluminum plate 201 in a snap-fastening manner. An end cover 205 is wrapped outside the heating wire fixing component 206, and all components of the heating wire fixing component 206 are wrapped inside through this end cover 205. While protecting the heating wire fixing component 206, it can prevent the components of the heating wire fixing component 206 from falling off.

[0037] As Figures 3 - 6As shown, the first safety door assembly 100 includes a first safety door panel 101 and a first flexible part 102, and the first flexible part 102 is fixedly installed on the side of the first safety door panel 101 close to the material; the second safety door assembly 300 includes a second safety door panel 301 and a second flexible part 302, and the first flexible part 302 is fixedly installed on the side of the second safety door panel 301 close to the material.

[0038] As Figures 3 - 6 shown, the power assembly 500 includes a fixed rod 509, a first power component 501, a mounting plate 508, a second power component 502 and a third power component 503. The fixed rod 509 is fixedly installed at the inner top of the side mounting plate 506. The first power component 501 is fixedly installed at the bottom of the fixed rod 509, and the first power component 501 is connected to the support aluminum plate 201 of the sealing rod assembly 200 arranged at the top of the channel. The mounting plate 508 is fixedly installed on the main body of the first power component 501. The second power component 502 is fixedly installed on the upper surface of the mounting plate 508, and the output end of the second power component 502 is connected to the second safety door panel 301 of the second safety door assembly 300 arranged at the top of the channel. The third power component 503 is fixedly installed on the upper surface of the mounting plate 508, and the output end of the third power component 503 is connected to the first safety door panel 101 of the first safety door assembly 100 arranged at the top of the channel. Among them, the above-mentioned first power component, second power component and third power component 503 include but are not limited to cylinders, electric cylinders, hydraulic cylinders or other power devices capable of driving a component to move linearly.

[0039] In the present invention, the second power component drives the second safety door panel to slide vertically downward, and the third power component drives the third safety door panel to slide vertically downward to seal the front and rear sides of the channel. The safety door assembly presses and fixes the plastic film, thereby avoiding the staff from stretching and tightening the plastic film for a long time and at a high frequency to fix the plastic film, reducing the labor intensity. When the safety door arranged at the top of the channel touches the plastic film, the flexible part will buffer the extrusion of the safety door acting on the plastic film, reduce the instantaneous pressure and avoid damaging the plastic film. The flexible part in this embodiment includes but is not limited to rubber pads, silica gel pads and other components capable of elastic deformation. Subsequently, the first power component drives the sealing rod assembly to slide vertically in the sealing space formed by the safety door assembly and the housing to heat-seal the plastic film, realizing the safe advancement of the plastic film heat-sealing work and improving the safety of the plastic film heat-sealing.

[0040] To prevent the plastic film from sticking to the heating wire 204 during the heat sealing process, a layer of Teflon cloth 203 is wrapped around the outer surface of the heating wire 206 in the present invention. Since the surface of the Teflon cloth is smooth, it has good anti-adhesion, chemical corrosion resistance, high temperature resistance, and excellent insulation performance. Therefore, pasting the Teflon cloth on the outer surface of the heating wire can improve the corrosion resistance of the heating wire 206, and at the same time, prevent the plastic film from sticking to the heating wire 204 during the heat sealing process, which is difficult to clean up.

[0041] To avoid damaging the plastic film during the heat sealing process, a silica gel pad 202 is provided between the heating wire 206 and the supporting aluminum plate 201 in the present invention. The force generated when the slidable sealing rod assembly provided at the top of the channel contacts the sealing rod assembly provided at the bottom of the channel is reduced under the buffering action of the silica gel pad, which can avoid damaging the plastic film due to excessive pressure during the heat sealing process.

[0042] To avoid the sealing rod assembly provided at the top of the channel from shifting during the vertical sliding process, the power assembly 500 of the present invention further includes a guide rail 506 and a connecting portion 507. The guide rail 506 is fixedly installed on the outer side of the above-mentioned installation side plate 406, and the connecting portion 507 is fixedly installed on both sides of the supporting aluminum plate 201 of the sealing rod assembly 200 provided at the top of the above-mentioned channel 407, and the connecting portion 507 is connected to the above-mentioned guide rail 506 through a slider. The sealing rod provided at the top of the channel slides vertically along the direction of the guide rail 506, and the vertical sliding of the sealing rod assembly is guided by the guide rail 506, avoiding the sealing rod assembly from shifting during the sliding process and improving the movement accuracy.

[0043] To avoid the first installation door assembly and the second safety door assembly provided at the top of the channel from shifting during the sliding process, the power assembly 500 of the present invention further includes two connecting rods 505 respectively connected to the above-mentioned first safety door plate 101 and the second safety door plate 301. The ends of the connecting rods 505 far from the above-mentioned first and second safety door plates both pass through the installation plate 508, and a limiting portion 504 is installed at this end to connect the connecting rods 505 connecting different safety door plates. The connecting rods 505 guide the vertical sliding of the first safety door assembly and the second safety door assembly provided at the top of the channel, which can avoid the first installation door assembly and the second safety door assembly provided at the top of the channel from shifting during the sliding process. At the same time, the limiting portion 504 forms an interface with the installation plate 508 when the first installation door assembly and the second safety door assembly provided at the top of the channel slide to the maximum stroke, preventing the first installation door assembly and the second safety door assembly provided at the top of the channel from continuing to slide, limiting the movement stroke of the first installation door assembly and the second safety door assembly provided at the top of the channel, and avoiding the first installation door assembly and the second safety door assembly provided at the top of the channel from moving beyond the stroke, improving the safety.

[0044] To improve the automation level of the device, the present invention further includes a control panel 404 for controlling the operation of the above-mentioned power components, setting heating parameters and pressing time. The control panel 404 is fixedly installed on the outer surface of the above-mentioned housing 403. An electrical box 401 is also fixedly installed at the bottom of the housing 403. The electrical box 401 is provided with an electrical control device that responds to the command signals and parameters of the above-mentioned control panel 404. A moving device 402 can also be provided at the bottom of the electrical box 401. The moving device 402 includes, but is not limited to, an AGV cart, universal wheels or other devices or mechanisms that can move the device. By setting the operating parameters of the heat-sealing device through the control panel 404 and controlling the operation of the device according to the parameters, the intelligence level of the device is improved, making the device more convenient to operate.

[0045] The foregoing description of the embodiments of the invention has been presented for purposes of illustration and description. The description is not intended to be exhaustive or to limit the invention to the precise form disclosed; numerous modifications and variations are possible in light of the above teachings. The embodiments were chosen and described in order to best explain the principles of the invention and its practical application, to thereby enable others skilled in the art to best utilize the invention in various embodiments and with various modifications as are suited to the particular use contemplated. It will thus be understood that the invention is intended to cover all modifications and equivalents falling within the scope of the appended claims.

Claims

1. A plastic film heat-sealing device, characterized in that, including an installation component, which includes installation side plates and a housing. A channel runs through the housing from the front to the back in the middle of the housing, through which the material to be sealed can pass. The installation side plates are fixedly installed on both sides inside the above-mentioned housing; a power component, which is arranged at the upper part inside the above-mentioned housing and is fixedly connected to the installation side plates; a first safety door component, which is respectively arranged at the top and bottom of the above-mentioned channel. The first safety door components arranged at the top and bottom of the channel are arranged opposite to each other. The first safety door component arranged at the top of the channel can slide vertically relative to the housing. The first safety door component arranged at the top of the channel is driven by the power component to slide vertically. The first safety door component arranged at the bottom of the channel is fixedly installed with the above-mentioned housing; a second safety door component, which is arranged parallel to the above-mentioned first safety door component on the back side of the first safety door component. The second safety door component is respectively arranged at the top and bottom of the above-mentioned channel. The first safety door components arranged at the top and bottom of the channel are arranged opposite to each other. The second safety door component arranged at the top of the channel can slide vertically relative to the housing. The second safety door component arranged at the top of the channel is driven by the power component to slide vertically. The second safety door component arranged at the bottom of the channel is fixedly installed with the above-mentioned housing; and a sealing rod component, configured to heat-seal a plastic film. The sealing rod component is arranged between the above-mentioned first safety door component and the second safety door component. The sealing rod components are respectively arranged at the top and bottom of the above-mentioned channel. The sealing rod components arranged at the top and bottom of the channel are arranged opposite to each other. The sealing rod component arranged at the top of the channel is driven by the above-mentioned power component to slide vertically. The sealing rod component arranged at the bottom of the channel is fixedly installed with the above-mentioned housing; The sealing rod component includes a supporting aluminum plate; a heating wire, which is arranged on the side of the supporting aluminum plate close to the material to be sealed; a heating wire fixing component, configured to fix the above-mentioned heating wire on the surface of the supporting aluminum plate. The heating wire fixing component is arranged on both sides of the supporting aluminum plate; The sealing rod component further includes a Teflon cloth wrapped around the outer surface of the above-mentioned heating wire; The power component includes a fixing rod, which is fixedly installed at the inner top of the side installation plate; and a first power part, which is fixedly installed at the bottom of the above-mentioned fixing rod. The first power part is connected to the supporting aluminum plate of the sealing rod component arranged at the top of the channel; The first safety door component includes a first safety door plate; and a first flexible part, which is fixedly installed at the side of the first safety door plate close to the material; The second safety door component includes a second safety door plate; and a second flexible part, which is fixedly installed at the side of the second safety door plate close to the material.

2. The plastic film heat-sealing device according to claim 1, characterized in that, A silica gel pad is arranged between the heating wire and the supporting aluminum plate.

3. A plastic film heat-sealing device according to claim 1, characterized in that, The power component further includes a guide rail, which is fixedly installed on the outer side surface of the above-mentioned installation side plate; and a connecting part, which is fixedly installed on both sides of the supporting aluminum plate of the sealing rod component arranged at the top of the channel, and the connecting part is connected to the above-mentioned guide rail through a slider.

4. A plastic film heat-sealing device according to claim 1, characterized in that, The power component further includes Mounting plate, which is fixedly mounted on the main body of the first power component; Second power component, which is fixedly mounted on the upper surface of the above-mentioned mounting plate, and the output end of the second power component is connected to the second safety door panel of the second safety door assembly arranged at the top of the channel; And Third power component, which is fixedly mounted on the upper surface of the above-mentioned mounting plate, and the output end of the third power component is connected to the first safety door panel of the first safety door assembly arranged at the top of the channel.

5. A plastic film heat-sealing device according to claim 4, characterized in that, The power assembly further includes two groups of connecting rods respectively connected to the above-mentioned first safety door panel and second safety door panel. The ends of the connecting rods far from the first safety door panel and second safety door panel respectively pass through the mounting plate upwards, and a limiting part is installed at this end to connect the connecting rods connecting different safety door panels.

6. A plastic film heat-sealing device according to any one of claims 1 to 5, characterized in that, The device further includes a control panel for controlling the operation of the above-mentioned power assembly, setting heating parameters and pressing time, and the control panel is fixedly mounted on the outer surface of the above-mentioned housing.

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