PE plastic tarpaulin heat sealing device and method based on plastic recovery

Abstract

The invention discloses a PE plastic tarpaulin heat sealing device and method based on plastic recycling. The PE plastic tarpaulin heat sealing device comprises two vertical plates which are symmetrically arranged, a belt which circularly operates in the vertical direction is installed between the two vertical plates, a slotting roller is installed under the belt, a pressing roller is installed below the side of the belt, and a shaping assembly is installed above the pressing roller. An oil coating assembly is mounted at the bottom of the shaping assembly; a fire row combustor is installed below the position between the pressing and covering roller and the belt, a tarpaulin winding mechanism is installed above the vertical plate, and PE plastic rubber and a basalt fiber net are subjected to heat sealing to form PE plastic tarpaulin which is wound upwards through the tarpaulin winding mechanism. The problems that a traditional PE plastic tarpaulin is poor in tensile strength and tear resistance and insufficient in high temperature resistance are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of tarpaulins, and in particular to a PE plastic tarpaulin heat-sealing device and method based on plastic recycling. Background Art

[0002] Tarpaulins are a commonly used covering and protective material in many fields, including industry, agriculture, and daily life. They are widely used in scenarios such as cargo transportation covering, construction site protection, and outdoor storage protection. Traditional PE plastic tarpaulins are mainly made from a single PE plastic. Although they have certain water resistance and flexibility, which can meet basic waterproof and dustproof requirements, they have significant physical performance defects. Their tensile strength and tear resistance are limited. When subjected to large external forces and friction, they are prone to damage and tearing, which shortens the tarpaulin's service life and makes it unsuitable for harsh operating environments such as heavy-load transportation and strong winds.

[0003] To improve tarpaulin performance, some technologies employ the addition of reinforcing materials to PE plastic. However, due to issues like material compatibility, the reinforcement effect is limited, making it difficult to fundamentally improve the tarpaulin's mechanical properties. As for heat resistance, traditional PE plastic tarpaulins are prone to softening, deformation, aging, and brittleness in high-temperature environments, especially after prolonged exposure to the sun. This degrades their waterproofing and weakens their structural strength, significantly limiting their application in high-temperature operating environments and for extended outdoor use.

[0004] Furthermore, from a resource and environmental perspective, traditional tarpaulin production relies on large quantities of new plastic raw materials, which not only increases production costs but also leads to resource depletion and environmental pollution. Existing technologies for recycled plastics have shortcomings in improving product performance and ensuring stable production, making it difficult to achieve efficient and high-quality recycling of waste plastics.

[0005] Therefore, how to effectively improve the tensile strength, tear resistance, and high temperature resistance of PE plastic tarpaulins, while also achieving the rational utilization of waste plastics, has become a pressing issue in the current tarpaulin production field. Therefore, we propose a PE plastic tarpaulin heat-sealing device and method based on plastic recycling. Summary of the Invention

[0006] In order to solve the problems of poor tensile strength and tear resistance and insufficient high temperature resistance of traditional PE plastic tarpaulins, the purpose of the present invention is to provide a PE plastic tarpaulin heat sealing device and method based on plastic recycling.

[0007] To achieve the above objectives, the present invention adopts the following technical solutions: a PE plastic tarpaulin heat-sealing device based on plastic recycling, comprising two symmetrically arranged vertical plates, a belt circulating in a vertical direction installed between the two vertical plates, a slit roller with adjustable height installed directly below the belt, a pressing roller with adjustable height installed below the side of the belt, a shaping assembly with adjustable angle installed above the pressing roller, and an oiling assembly installed at the bottom of the shaping assembly for applying oil to the surface of the pressing roller; the pressing roller is located 45 degrees below the semicircle below the belt, a fire bar burner is installed below the pressing roller and the belt, a first support rod is installed on the side of the belt opposite to the pressing roller, and a second support rod is installed on the side of the pressing roller opposite to the belt, a tarpaulin reeling mechanism is installed above the vertical plates, a PE plastic rubber passes downward between the first support rod and the belt, and a basalt fiber mesh passes downward between the pressing roller and the second support rod. After heat sealing, the PE plastic rubber and the basalt fiber mesh form a PE plastic tarpaulin, which is reeled upward by the tarpaulin reeling mechanism.

[0008] Preferably, a first rectangular hole is provided on the side wall of the vertical plate near the bottom, and a second rectangular hole is provided on the side wall above the first rectangular hole; a lifting block is slidably sleeved on the inner wall of the second rectangular hole, a first hydraulic cylinder is fixedly installed in the first rectangular hole, the telescopic end of the first hydraulic cylinder is fixedly connected to the bottom of the lifting block, the end of the slit roller is rotatably installed on the side wall of the lifting block through a connecting shaft, a first motor is fixedly installed on the lifting block, the output shaft of the first motor is axially connected to the connecting shaft at one end of the slit roller, and a plurality of slit blades arranged in a ring array are fixedly provided on the outer wall of the slit roller.

[0009] Preferably, the inner walls at both ends of the belt are engaged with two driving rollers, and the two ends of the driving rollers are rotatably installed on the side walls of the two vertical plates through connecting shafts. The side walls of the vertical plates are installed with a second motor, and the output shaft of the second motor is connected to the connecting shaft at one end of the driving roller. The inner wall of the belt is slidably connected to a fixed plate, and the two side walls of the fixed plate are fixedly connected to the side walls of the two vertical plates. The upper and lower ends of the fixed plate are respectively provided with arc grooves that are slidably connected to the outer walls of the driving rollers.

[0010] Preferably, a second hydraulic cylinder is fixedly installed on the side wall of the vertical plate near the bottom, and the telescopic end at the top of the second hydraulic cylinder is fixedly connected to a lifting plate, a sleeve is rotatably inserted into the side wall of the lifting plate, a rotating shaft is rotatably sleeved on the inner wall of the sleeve, and a mounting plate is fixedly sleeved on the outer wall; one end of the rotating shaft is fixedly connected to the end of the pressing roller; a third motor is fixedly installed on one of the lifting plates, and the output shaft of the third motor is axially connected to the end of the rotating shaft, and a fourth motor is fixedly installed on the other lifting plate, and the output end of the fourth motor is axially connected to one of the sleeves.

[0011] Preferably, the shaping component includes a shaping plate fixedly mounted on the side wall of the mounting plate, the side wall of the shaping plate near the bottom is arc-shaped, and the downward extension line of the arc wall is tangent to the outer wall of the pressing roller; the bottom of the shaping plate is also arc-shaped, and the inner wall of the arc is slidingly connected to the outer wall of the pressing roller; a third rectangular hole is provided on the side wall of the shaping plate near the top, and a metal heat conducting plate is fixedly sleeved on the inner wall of the third rectangular hole near the belt side, the side wall of the metal heat conducting plate near the belt side is flush with the side of the shaping plate, and the side wall located inside the third rectangular hole is fixedly connected to a number of heat sinks arranged laterally, and a cover plate is fixedly connected to the port of the third rectangular hole away from the metal heat conducting plate, a cross-flow fan is fixedly mounted on the side wall of the shaping plate, and an air outlet connected to the interior of the third rectangular hole is provided on the other side; the air outlet end of the cross-flow fan is connected to the interior of the third rectangular hole.

[0012] Preferably, the oiling assembly includes an oil tank provided inside the shaping plate, and also includes a filling slot provided at the bottom of the shaping plate; the inner wall of the oil tank is vertically fixedly connected to a guide rod, the outer wall of the guide rod is slidably connected to a strip plate, the outer wall of the guide rod located above the strip plate is provided with a spring pressed against the top surface of the strip plate, the bottom of the strip plate is fixedly connected to a number of evenly arranged columns, the outer wall of the column is provided with an oil pouring slot, the column slides vertically downward to be connected to the bottom of the oil tank, and its bottom extends to the inside of the filling slot; the shaping plate is located at the filling A movable rod is slidably connected to the bottom of the groove side, the top of the movable rod is fixedly connected to the bottom of the strip plate, and its bottom is a hemispherical surface; the interior of the filling groove is filled with sponge, and the bottom of the sponge is tightly pressed against the outer wall of the pressing roller. Annular grooves are provided on the outer walls of both ends of the pressing roller, and arc-shaped protrusions are fixedly connected to the outer walls of the annular grooves, and the arc-shaped protrusions are tightly pressed against the bottom of the movable rod. The pressing roller is hollow, and a spiral heating rod is fixedly installed inside; the pressing roller is made of metal heat-conducting material; a refueling port connected to the oil tank is provided on the shaping plate.

[0013] Preferably, the fire bar burner is a bidirectional fire bar, and its flame spraying direction is respectively toward the axis direction of the semicircular turning point below the belt and the axis direction of the pressing roller.

[0014] Preferably, the side wall of the vertical plate is fixedly connected to a first mounting block, and the side wall of the first mounting block is rotatably connected to the end of the first support rod; the side wall of the mounting plate is fixedly connected to a second mounting block, and the end of the second support rod is rotatably connected to the side wall of the second mounting block.

[0015] Preferably, an open groove is provided on the side wall of the vertical plate near the top, and the bottom of the open groove is set as a semicircular arc. The tarpaulin rolling mechanism includes a third hydraulic cylinder fixedly installed on the top of the vertical plate, and a fifth motor is fixedly installed on the telescopic end of the bottom of the third hydraulic cylinder. The output end shaft of the fifth motor is connected to the first gear. The tarpaulin rolling mechanism also includes a support shaft rotatably installed at the bottom of the open groove, and the outer wall of the support shaft is fixedly sleeved with a second gear and a winding wheel. The second gear is driven down by the third hydraulic cylinder to engage with the first gear.

[0016] A method for heat-sealing PE plastic tarpaulin based on plastic recycling comprises the following steps:

[0017] Step 1: Flip the shaping component to the horizontal position, and at the same time, the pressing roller descends to leave a gap, the slit roller descends, and the PE plastic rubber passes downward between the first support rod and the belt, and then passes through between the belt and the slit roller, and between the belt and the fire grate burner in sequence. The basalt fiber mesh passes downward through the pressing roller and the second support rod, and then passes through between the pressing roller and the fire grate burner. The PE plastic rubber and the basalt fiber mesh are laminated and pass through the pressing roller and the belt together, and are reeled in by the tarpaulin reeling mechanism. The pressing roller rises and resets to press the basalt fiber mesh, the shaping component is flipped to the vertical position, and the slit roller rises.

[0018] In step 2, the heat sealing device operates, the slitting roller rotates to slit the PE plastic rubber, and the slitted PE plastic rubber bends at the turning point at the bottom of the belt, and the slit opens. The fire row burner is ignited, spraying fire on the PE plastic rubber and the basalt fiber mesh. The flame heats the PE plastic rubber at the slit and heats the basalt fiber mesh at the same time.

[0019] Step 3: The pressing roller rotates to press the heated basalt fiber mesh into the hot-melt PE plastic rubber, and at the same time, the oiling component coats the surface of the pressing roller with oil;

[0020] In step 4, the PE plastic rubber after being pressed into the basalt fiber mesh gradually changes from a curved shape to a vertical shape. During the conversion process, the seam at the slit gradually closes, and the basalt fiber mesh is completely buried in the hot melt rubber of the PE plastic rubber; and the shaping component presses the PE plastic rubber after being pressed into the basalt fiber mesh between the belts, and after pressing and shaping to form a PE plastic tarpaulin, it is rolled up by the tarpaulin rolling mechanism.

[0021] Compared with the prior art, the present invention achieves the following beneficial effects:

[0022] 1. The present invention forms a PE plastic tarpaulin by heat-sealing PE plastic rubber and basalt fiber mesh. The PE plastic tarpaulin not only retains the waterproof and flexible properties of the PE plastic rubber, but also greatly improves the tensile strength, tear resistance and high temperature resistance of the tarpaulin due to the embedding of the basalt fiber mesh, and is resistant to sun exposure, effectively extending the service life of the tarpaulin.

[0023] 2. The present invention uses a slit roller to slit the PE plastic rubber. The slitted PE plastic rubber is bent under the belt, and the slit is opened, so that the inner wall of the slit of the PE plastic rubber can fully contact the flame of the fire grate burner, so that it is evenly heated and melted.

[0024] 3. The present invention uniformly heats the basalt fiber mesh through the flame of the fire row burner, thereby preventing the hot melt plastic from solidifying prematurely due to the low temperature of the basalt fiber mesh, and allowing the basalt fiber mesh to fully fuse with the hot melt plastic at a high temperature.

[0025] 4. The present invention presses the basalt fiber mesh into the hot-melt PE plastic rubber, gradually transforms the curved shape into a vertical shape, and gradually closes the seam at the slit, so that the basalt fiber mesh is completely buried in the hot-melt rubber of the PE plastic rubber.

[0026] 5. The present invention heats the surface of the coating roller and the oil on its outer wall by heating with a spiral heating rod, thereby preventing the hot melt plastic from solidifying prematurely due to the low surface temperature of the coating roller.

[0027] 6. In the present invention, the oil coating assembly realizes automatic coating of oil on the surface of the pressing roller through the cooperation of the arc-shaped protrusion and the movable rod when the pressing roller rotates, effectively avoiding adhesion between the pressing roller and the hot-melt plastic. At the same time, the oil is coated and pressed on the basalt fiber mesh and PE plastic rubber by the pressing roller, which can play a heat-insulating role and avoid excessive heat dissipation at the arc surface near the bottom of the shaping plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0029] Figure 1 It is a schematic structural diagram of the present invention as a whole;

[0030] Figure 2 This is a schematic diagram of the overall structure of one side of the first support rod of the present invention;

[0031] Figure 3 This is a schematic diagram of the thermal synthesis of the PE plastic tarpaulin of the present invention;

[0032] Figure 4 It is a structural schematic diagram of the belt of the present invention;

[0033] Figure 5 It is a structural schematic diagram of the slit roller of the present invention;

[0034] Figure 6 It is a structural schematic diagram of the pressing roller of the present invention;

[0035] Figure 7A schematic structural diagram of the spiral heating rod of the present invention;

[0036] Figure 8 A schematic diagram of the position of the fire row burner of the present invention;

[0037] Figure 9 It is a structural schematic diagram of the fire row burner of the present invention;

[0038] Figure 10 It is a structural schematic diagram of the oiling assembly of the present invention;

[0039] Figure 11 It is a structural schematic diagram of the shaping component of the present invention.

[0040] In the figure: 1. Vertical plate; 101. First rectangular hole; 102. Second rectangular hole; 103. Open slot; 2. Belt; 201. Driving roller; 202. Second motor; 203. Fixed plate; 3. Slit roller; 301. Lifting block; 302. First hydraulic cylinder; 303. First motor; 4. Pressing roller; 401. Second hydraulic cylinder; 402. Lifting plate; 403. Sleeve; 404. Rotating shaft; 405. Mounting plate; 406. Third motor; 407. Fourth motor; 408. Annular groove; 409. Arc-shaped protrusion; 410. Spiral heating rod; 5. Shaping assembly; 501. Shaping plate; 502. Third rectangular hole; 503. Metal heat conducting plate; 504. Heat sink; 505. Cover plate; 506, cross-flow fan; 507, air outlet; 6, oiling assembly; 601, oil tank; 602, filling tank; 603, guide rod; 604, strip plate; 605, spring; 606, column; 607, oil pouring tank; 608, movable rod; 609, sponge; 7, fire grate burner; 8, first support rod; 801, first mounting block; 9, second support rod; 901, second mounting block; 10, tarpaulin rewinding mechanism; 1001, third hydraulic cylinder; 1002, fifth motor; 1003, first gear; 1004, support shaft; 1005, second gear; 1006, rewinding wheel; 11, PE plastic rubber; 12, basalt fiber mesh; 13, PE plastic tarpaulin. DETAILED DESCRIPTION

[0041] The following describes the implementation of the present invention through specific embodiments. People skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0042] See also Figures 1 to 11. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the efficacy and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0043] The present invention provides a technical solution: a PE plastic tarpaulin heat-sealing device based on plastic recycling, which is mainly composed of two symmetrically arranged vertical plates 1 to form a basic frame. A belt 2 that circulates in the vertical direction is installed between the two vertical plates 1, and the operation of the belt 2 is driven by two driving rollers 201 whose inner walls are meshed at both ends. The two ends of the driving roller 201 are rotatably installed on the side walls of the two vertical plates 1 through a connecting shaft. A second motor 202 is installed on the side wall of the vertical plate 1. The output shaft of the second motor 202 is connected to the connecting shaft at one end of the driving roller 201, thereby driving the driving roller 201 to rotate, and then driving the belt 2 to circulate. In order to ensure the stability of the belt 2, a fixed plate 203 is slidably connected to the inner wall of the belt 2. The two side walls of the fixed plate 203 are fixedly connected to the side walls of the two vertical plates 1, and the upper and lower ends of the fixed plate 203 are respectively provided with arc grooves that are slidably connected to the outer wall of the driving roller 201.

[0044] A height-adjustable slit roller 3 is installed directly below the belt 2, and a height-adjustable pressing roller 4 is installed to the side and below. An adjustable-angle shaping assembly 5 is installed above the pressing roller 4, and an oiling assembly 6 is installed at the bottom of the shaping assembly 5. The pressing roller 4 is located 45 degrees below the semicircle below the belt 2. A fire bar burner 7 is installed below the pressing roller 4 and the belt 2. A first support rod 8 is installed to the side of the belt 2 opposite the pressing roller 4, and a second support rod 9 is installed to the side of the pressing roller 4 opposite the belt 2. A tarpaulin rewinding mechanism 10 is installed above the vertical plate 1. During operation, a PE plastic rubber sheet 11 passes downward between the first support rod 8 and the belt 2, and a basalt fiber mesh 12 passes downward between the pressing roller 4 and the second support rod 9. The PE plastic rubber sheet 11 and the basalt fiber mesh 12 are heat-sealed to form a PE plastic tarpaulin 13, which is then reeled upward by the tarpaulin rewinding mechanism 10.

[0045] A first rectangular hole 101 is formed in the side wall of the vertical plate 1 near the bottom, and a second rectangular hole 102 is formed in the side wall above the first rectangular hole 101. A lifting block 301 is slidably mounted on the inner wall of the second rectangular hole 102. A first hydraulic cylinder 302 is fixedly mounted in the first rectangular hole 101. The telescopic end of the first hydraulic cylinder 302 is fixedly connected to the bottom of the lifting block 301. The telescopic movement of the first hydraulic cylinder 302 enables the lifting block 301 to slide up and down within the second rectangular hole 102. The end of the slitting roller 3 is rotatably mounted on the side wall of the lifting block 301 via a connecting shaft. A first motor 303 is fixedly mounted on the lifting block 301, and the output shaft of the first motor 303 is axially connected to the connecting shaft at one end of the slitting roller 3. A plurality of slitting blades are fixedly mounted in an annular array on the outer wall of the slitting roller 3. When the first motor 303 is activated, it drives the slitting roller 3 to rotate, and the slitting blades can slit the PE plastic rubber 11 passing between the belt 2 and the slitting roller 3. Furthermore, the height of the slitting roller 3 can be adjusted by the first hydraulic cylinder 302 according to actual needs.

[0046] A second hydraulic cylinder 401 is fixedly mounted on the side wall of the vertical plate 1 near the bottom. The top telescopic end of the second hydraulic cylinder 401 is fixedly connected to a lifting plate 402. The extension and retraction of the second hydraulic cylinder 401 controls the lifting and lowering of the lifting plate 402. A sleeve 403 is rotatably connected to the side wall of the lifting plate 402. A rotating shaft 404 is rotatably connected to the inner wall of the sleeve 403, while a mounting plate 405 is fixedly connected to the outer wall. One end of the rotating shaft 404 is fixedly connected to the end of the pressing roller 4. A third motor 406 is fixedly mounted on one of the lifting plates 402. The output shaft of the third motor 406 is axially connected to the end of the rotating shaft 404. When the third motor 406 is activated, the rotating shaft 404 drives the pressing roller 4 to rotate. A fourth motor 407 is fixedly mounted on the other lifting plate 402. The output end of the fourth motor 407 is axially connected to one of the sleeves 403. The fourth motor 407 drives the sleeve 403 to rotate, which in turn drives the mounting plate 405 to rotate, thereby achieving angle adjustment of the shaping assembly 5. At the same time, the pressing roller 4 is hollow and has a spiral heating rod 410 fixedly installed inside. The pressing roller 4 is made of metal heat-conducting material. When the spiral heating rod 410 is heated, it can heat the surface of the pressing roller 4 and the oil on its outer wall to avoid the low surface temperature of the pressing roller 4 causing the hot melt plastic to solidify prematurely.

[0047] The shaping assembly 5 includes a shaping plate 501 fixedly mounted on the side wall of the mounting plate 405. The side wall of the shaping plate 501 near the bottom is curved, and its downward extension is tangent to the outer wall of the pressing roller 4. At this point, the PE plastic rubber 11, after being pressed into the basalt fiber mesh 12, gradually transforms from a curved shape to a vertical shape. During this transformation, the slits at the openings gradually close, completely burying the basalt fiber mesh 12 in the hot-melt rubber of the PE plastic rubber 11. The bottom of the shaping plate 501 is also curved, and the inner wall of this arc is in sliding connection with the outer wall of the pressing roller 4, ensuring a tight fit between the shaping plate 501 and the pressing roller 4.

[0048] A third rectangular hole 502 is formed on the sidewall of the shaping plate 501 near the top. A metal heat conducting plate 503 is fixedly mounted on the inner wall of the third rectangular hole 502 near the belt 2. The sidewall of the metal heat conducting plate 503 near the belt 2 is flush with the side of the shaping plate 501, and a plurality of horizontally arranged heat sinks 504 are fixedly connected to the sidewall of the metal heat conducting plate 503 located inside the third rectangular hole 502. A cover plate 505 is fixedly connected to the end of the third rectangular hole 502 away from the metal heat conducting plate 503. A crossflow fan 506 is fixedly mounted on the sidewall of the shaping plate 501, and an air outlet 507 is provided on the other side of the shaping plate 501, which is connected to the interior of the third rectangular hole 502. The air outlet of the crossflow fan 506 is connected to the interior of the third rectangular hole 502. When the cross-flow fan 506 is working, air flow is sent into the third rectangular hole 502, and the air flow takes away the heat from the heat sink 504 and the metal heat conducting plate 503. The metal heat conducting plate 503 absorbs the heat when the PE plastic tarpaulin adheres to it is heat-sealed, causing it to harden quickly. The air flow after absorbing heat is discharged from the air outlet 507.

[0049] The oiling assembly 6 comprises an oil tank 601 located within the shaping plate 501 and a filling tank 602 located at the bottom of the shaping plate 501. The oil tank 601 is filled with methyl silicone oil. A guide rod 603 is vertically fixedly connected to the inner wall of the oil tank 601. A strip plate 604 is slidably connected to the outer wall of the guide rod 603. The outer wall of the guide rod 603, located above the strip plate 604, is sheathed with a spring 605 that abuts against the top surface of the strip plate 604. Several evenly spaced columns 606 are fixedly connected to the bottom of the strip plate 604. The outer walls of the columns 606 are defined by oil pouring grooves 607. The columns 606 slide vertically downward through the bottom of the oil tank 601, and their bottoms extend into the interior of the filling tank 602. A movable rod 608 is slidably connected to the bottom of the shaping plate 501, located on the side of the filling groove 602. The top of the movable rod 608 is fixedly connected to the bottom of the strip plate 604, and its bottom is hemispherical. The filling groove 602 is filled with sponge 609, the bottom of which presses against the outer wall of the pressing roller 4. The outer wall of the pressing roller 4 has annular grooves 408 at both ends. The outer wall of the annular grooves 408 is fixedly connected to the outer wall of the annular grooves 408, and the arc-shaped protrusions 409 are tightly connected to the bottom of the movable rod 608.

[0050] When the coating roller 4 rotates, the curved protrusion 409 lifts the movable rod 608, and the strip plate 604 lifts the column 606, allowing the oil pouring groove 607 to flow into the oil tank 601. The oil in the oil tank 601 flows into the pouring groove 607 and is then drained into the sponge 609. After the curved protrusion 409 leaves the movable rod 608, the downward pressure of the spring 605 causes the pouring groove 607 to drop out of the oil tank 601, blocking the oil from entering the filling groove 602. The oil absorbed by the sponge 609 is coated on the outer wall of the coating roller 4, preventing the coating roller 4 from adhering to the hot-melt plastic. The shaping plate 501 is provided with a refueling port connected to the oil tank 601 to facilitate refilling of the oil in the oil tank 601.

[0051] The fire bar burner 7 is a bidirectional fire bar, spraying flames toward the axis of the semicircular bend below the belt 2 and the axis of the pressing roller 4. One direction of the fire spraying toward the axis of the semicircular bend below the belt 2 ensures that the inner wall of the slit PE plastic rubber 11 is fully exposed to the flames, resulting in uniform heating and melting. The other direction of the fire spraying toward the axis of the pressing roller 4 heats the PE plastic rubber 11 and basalt fiber mesh 12 near the pressing roller 4, ensuring a heat-sealing effect.

[0052] The side wall of the vertical plate 1 is fixedly connected to the first mounting block 801, and the side wall of the first mounting block 801 is rotatably connected to the end of the first support rod 8; the side wall of the mounting plate 405 is fixedly connected to the second mounting block 901, and the side wall of the second mounting block 901 is rotatably connected to the end of the second support rod 9, which facilitates the insertion and guidance of the PE plastic rubber 11 and the basalt fiber mesh 12.

[0053] The side wall of the vertical panel 1, near the top, is provided with an open slot 103, the bottom of which is a semicircular arc. The tarpaulin reeling mechanism 10 includes a third hydraulic cylinder 1001 fixedly mounted on the top of the vertical panel 1. A fifth motor 1002 is fixedly mounted on the telescopic end of the bottom of the third hydraulic cylinder 1001. The output end of the fifth motor 1002 is axially connected to a first gear 1003. The tarpaulin reeling mechanism 10 also includes a support shaft 1004 rotatably mounted on the bottom of the open slot 103. A second gear 1005 and a reel 1006 are fixedly sleeved on the outer wall of the support shaft 1004. When the PE plastic tarpaulin 13 needs to be reeled in, the third hydraulic cylinder 1001 drives the second gear 1005 downward to engage with the first gear 1003. The fifth motor 1002 is activated, and the meshing transmission between the first gear 1003 and the second gear 1005 drives the reel 1006 to rotate, thereby reeling in the PE plastic tarpaulin 13.

[0054] A method for heat-sealing PE plastic tarpaulin based on plastic recycling, comprising the following steps:

[0055] S1, Preparation:

[0056] The shaping assembly 5 is flipped horizontally. The fourth motor 407 drives the sleeve 403 to rotate, driving the mounting plate 405 to rotate, thereby achieving horizontal flipping of the shaping assembly 5. Simultaneously, the pressing roller 4 is lowered to create a gap. The second hydraulic cylinder 401 controls the lowering of the lifting plate 402, which in turn drives the pressing roller 4 downward. The slit roller 3 is lowered, and the first hydraulic cylinder 302 controls the lowering of the lifting block 301, causing the slit roller 3 to descend. The PE plastic rubber sheet 11 is then passed downward between the first support rod 8 and the belt 2, then between the belt 2 and the slit roller 3, and then between the belt 2 and the fire grate burner 7. The basalt fiber mesh 12 is passed downward through the pressing roller 4 and the second support rod 9, and then between the pressing roller 4 and the fire grate burner 7. The PE plastic rubber sheet 11 and the basalt fiber mesh 12 are then aligned and passed together between the pressing roller 4 and the belt 2, where they are then reeled up by the tarpaulin reeling mechanism 10. Afterwards, the pressing roller 4 rises and resets to press the basalt fiber mesh 12, and the lifting plate 402 is controlled to rise by the second hydraulic cylinder 401; the shaping component 5 is flipped to vertical, and the sleeve 403 is driven to rotate by the fourth motor 407, driving the mounting plate 405 to rotate, thereby realizing the vertical flipping of the shaping component 5; the slit roller 3 rises, and the lifting block 301 is controlled to rise by the first hydraulic cylinder 302 to make the slit roller 3 rise.

[0057] S2, heat sealing operation:

[0058] Each unit of the heat sealing device operates. The slitting roller 3 rotates to slit the PE plastic rubber sheet 11. The first motor 303 is activated, driving the slitting roller 3 to rotate, and the slitting blades slit the PE plastic rubber sheet 11. The slit PE plastic rubber sheet 11 bends at the bend at the bottom of the belt 2, causing the slit to open. The fire bar burner 7 ignites, spraying flames onto the PE plastic rubber sheet 11 and the basalt fiber mesh 12. The flames melt the PE plastic rubber sheet 11 at the slit and simultaneously heat the basalt fiber mesh 12.

[0059] S3, pressing operation:

[0060] The pressing roller 4 rotates, pressing the heated basalt fiber mesh 12 into the hot-melt PE plastic rubber 11. The third motor 406 is activated, driving the pressing roller 4 to rotate via the rotating shaft 404, thus achieving the pressing operation. Simultaneously, the oiling assembly 6 applies oil to the surface of the pressing roller 4. As the pressing roller 4 rotates, the arc-shaped protrusion 409 cooperates with the movable rod 608 to automatically apply the oil, preventing adhesion between the pressing roller 4 and the hot-melt plastic.

[0061] S4, shaping and rolling:

[0062] After the basalt fiber mesh 12 is pressed into the PE plastic rubber 11, it gradually changes from a curved shape to a vertical shape. During the conversion process, the slits at the slits gradually close, completely burying the basalt fiber mesh 12 in the hot melt rubber of the PE plastic rubber 11. The shaping component 5 presses the PE plastic rubber 11 after the basalt fiber mesh 12 is pressed into the belts 2, and performs pressing and shaping to form the PE plastic tarpaulin 13. During the shaping process, the cross-flow fan 506 works, so that the metal heat conducting plate 503 absorbs the heat when the PE plastic tarpaulin is heat-sealed, accelerating its hardening. After the shaping is completed, the tarpaulin reeling mechanism 10 reels it upwards, the third hydraulic cylinder 1001 drives the second gear 1005 to descend and engage with the first gear 1003, and the fifth motor 1002 starts, driving the reeling wheel 1006 to rotate, thereby reeling the PE plastic tarpaulin 13.

[0063] Through the above specific embodiments, the PE plastic tarpaulin heat-sealing device and method based on plastic recycling described in the present invention can efficiently and stably achieve the heat sealing of PE plastic rubber and basalt fiber mesh, and produce PE plastic tarpaulin with reliable quality.

[0064] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

1. A PE plastic tarpaulin heat-sealing device based on plastic recycling, comprising two symmetrically arranged vertical plates (1), characterized in that: A belt (2) that circulates in the vertical direction is installed between the two vertical plates (1), a slit roller (3) with adjustable height is installed directly below the belt (2), a pressing roller (4) with adjustable height is installed on the side and lower part of the belt (2), a shaping component (5) with adjustable angle is installed above the pressing roller (4), and an oiling component (6) is installed at the bottom of the shaping component (5) for applying oil to the surface of the pressing roller (4); the pressing roller (4) is located at 45 degrees below the semicircle below the belt (2), and a fire bar burner (7) is installed below between the pressing roller (4) and the belt (2). A first support rod (8) is installed on the side of the belt (2) relative to the other side of the pressing roller (4), and a second support rod (9) is installed on the side of the pressing roller (4) relative to the other side of the belt (2). A tarpaulin reeling mechanism (10) is installed above the vertical plate (1). A PE plastic rubber (11) passes downward between the first support rod (8) and the belt (2), and a basalt fiber mesh (12) passes downward between the pressing roller (4) and the second support rod (9). The PE plastic rubber (11) and the basalt fiber mesh (12) are heat-sealed to form a PE plastic tarpaulin (13) and are reeled upward by the tarpaulin reeling mechanism (10).

2. The PE plastic tarpaulin heat sealing device based on plastic recycling according to claim 1, characterized in that: The side wall of the vertical plate (1) near the bottom is provided with a first rectangular hole (101), and the side wall above the first rectangular hole (101) is provided with a second rectangular hole (102); the inner wall of the second rectangular hole (102) is slidably sleeved with a lifting block (301), a first hydraulic cylinder (302) is fixedly installed in the first rectangular hole (101), the telescopic end of the first hydraulic cylinder (302) is fixedly connected to the bottom of the lifting block (301), the end of the slit roller (3) is rotatably installed on the side wall of the lifting block (301) through a connecting shaft, a first motor (303) is fixedly installed on the lifting block (301), the output shaft of the first motor (303) is axially connected to the connecting shaft at one end of the slit roller (3), and the outer wall of the slit roller (3) is fixedly provided with a plurality of slit blades arranged in a ring array.

3. The PE plastic tarpaulin heat sealing device based on plastic recycling according to claim 1, characterized in that: Two driving rollers (201) are engaged with the inner walls at both ends of the belt (2), and the two ends of the driving roller (201) are rotatably mounted on the side walls of the two vertical plates (1) through a connecting shaft. A second motor (202) is mounted on the side wall of the vertical plate (1), and the output shaft of the second motor (202) is axially connected to the connecting shaft at one end of the driving roller (201). The inner wall of the belt (2) is slidably connected to a fixed plate (203), and the two side walls of the fixed plate (203) are fixedly connected to the side walls of the two vertical plates (1). The upper and lower ends of the fixed plate (203) are respectively provided with arc grooves that are slidably connected to the outer walls of the driving roller (201).

4. The PE plastic tarpaulin heat sealing device based on plastic recycling according to claim 1, characterized in that: A second hydraulic cylinder (401) is fixedly installed on the side wall of the vertical plate (1) near the bottom, and a telescopic end at the top of the second hydraulic cylinder (401) is fixedly connected to a lifting plate (402). A sleeve (403) is rotatably inserted into the side wall of the lifting plate (402), and a rotating shaft (404) is rotatably sleeved on the inner wall of the sleeve (403), and a mounting plate (405) is fixedly sleeved on the outer wall thereof; one end of the rotating shaft (404) is fixedly connected to the end of the pressing roller (4); a third motor (406) is fixedly installed on one of the lifting plates (402), and the output shaft of the third motor (406) is axially connected to the end of the rotating shaft (404); a fourth motor (407) is fixedly installed on the other lifting plate (402), and the output end of the fourth motor (407) is axially connected to one of the sleeves (403).

5. The PE plastic tarpaulin heat sealing device based on plastic recycling according to claim 4, characterized in that: The shaping assembly (5) includes a shaping plate (501) fixedly mounted on the side wall of the mounting plate (405), the side wall of the shaping plate (501) near the bottom is arc-shaped, and the downward extension line of the arc-shaped wall is tangent to the outer wall of the pressing roller (4); the bottom of the shaping plate (501) is also arc-shaped, and the inner wall of the arc is slidably connected to the outer wall of the pressing roller (4); the side wall of the shaping plate (501) near the top is provided with a third rectangular hole (502), and the inner wall of the third rectangular hole (502) near the side of the belt (2) is fixedly sleeved with a metal heat conducting plate (503), and the metal heat conducting plate (5 03) The side wall close to the belt (2) is flush with the side of the shaping plate (501), and the side wall located inside the third rectangular hole (502) is fixedly connected to a plurality of heat sinks (504) arranged laterally, and the port of the third rectangular hole (502) away from the metal heat conducting plate (503) is fixedly connected to a cover plate (505), a cross-flow fan (506) is fixedly installed on the side wall of the shaping plate (501), and an air outlet (507) connected to the inside of the third rectangular hole (502) is provided on the other side; the air outlet end of the cross-flow fan (506) is connected to the inside of the third rectangular hole (502).

6. The PE plastic tarpaulin heat sealing device based on plastic recycling according to claim 1, characterized in that: The oiling assembly (6) includes an oil tank (601) provided inside the shaping plate (501), and a filling groove (602) provided at the bottom of the shaping plate (501); the inner wall of the oil tank (601) is vertically fixedly connected to a guide rod (603), the outer wall of the guide rod (603) is slidably connected to a strip plate (604), the outer wall of the guide rod (603) located above the strip plate (604) is provided with a spring (605) pressed against the top surface of the strip plate (604), the bottom of the strip plate (604) is fixedly connected to a plurality of evenly arranged columns (606), the outer wall of the columns (606) is provided with an oil pouring groove (607), the columns (606) are vertically slid downwardly connected to the bottom of the oil tank (601), and the bottom of the columns extends to the inside of the filling groove (602); the shaping plate (501 ) A movable rod (608) is slidably connected to the bottom of the side of the filling groove (602), the top of the movable rod (608) is fixedly connected to the bottom of the strip plate (604), and its bottom is a hemispherical setting; the interior of the filling groove (602) is filled with sponge (609), the bottom of the sponge (609) is pressed against the outer wall of the pressing roller (4), and the outer walls of both ends of the pressing roller (4) are provided with annular grooves (408), the outer walls of the annular grooves (408) are fixedly connected with arc-shaped protrusions (409), and the arc-shaped protrusions (409) are pressed against the bottom of the movable rod (608), the pressing roller (4) is hollow, and a spiral heating rod (410) is fixedly installed inside; the pressing roller (4) is made of metal heat-conducting material; the shaping plate (501) is provided with a refueling port connected to the oil tank (601).

7. The PE plastic tarpaulin heat sealing device based on plastic recycling according to claim 1, characterized in that: The fire bar burner (7) is a bidirectional fire bar, and its flame spraying direction is respectively toward the axis direction of the semicircular turning point below the belt (2) and the axis direction of the pressing roller (4).

8. The PE plastic tarpaulin heat sealing device based on plastic recycling according to claim 4, characterized in that: The side wall of the vertical plate (1) is fixedly connected to a first mounting block (801), and the side wall of the first mounting block (801) is rotatably connected to the end of the first support rod (8); the side wall of the mounting plate (405) is fixedly connected to a second mounting block (901), and the end of the second support rod (9) is rotatably connected to the side wall of the second mounting block (901).

9. The PE plastic tarpaulin heat sealing device based on plastic recycling according to claim 1, characterized in that: The side wall of the vertical plate (1) near the top is provided with an open groove (103), and the bottom of the open groove (103) is arranged in a semicircular arc. The tarpaulin reeling mechanism (10) includes a third hydraulic cylinder (1001) fixedly mounted on the top of the vertical plate (1), a fifth motor (1002) fixedly mounted on the telescopic end of the bottom of the third hydraulic cylinder (1001), and the output end of the fifth motor (1002) is connected to a first gear (1003). The tarpaulin reeling mechanism (10) also includes a support shaft (1004) rotatably mounted on the bottom of the open groove (103), and the outer wall of the support shaft (1004) is fixedly sleeved with a second gear (1005) and a reeling wheel (1006), and the second gear (1005) is driven by the third hydraulic cylinder (1001) to descend and engage with the first gear (1003).

10. A heat-sealing method for PE plastic tarpaulin based on plastic recycling, characterized in that: The PE plastic tarpaulin heat sealing device based on plastic recycling according to any one of claims 1 to 8 comprises the following steps: Step 1: flip the shaping component (5) to the horizontal position, and at the same time, the pressing roller (4) is lowered to leave a gap, the slit roller (3) is lowered, the PE plastic rubber (11) passes downward between the first support rod (8) and the belt (2), and then passes between the belt (2) and the slit roller (3), and between the belt (2) and the fire grate burner (7) in sequence, the basalt fiber mesh (12) passes downward between the pressing roller (4) and the second support rod (9), and then passes between the pressing roller (4) and the fire grate burner (7), the PE plastic rubber (11) and the basalt fiber mesh (12) fit together and pass between the pressing roller (4) and the belt (2), and are wound by the tarpaulin winding mechanism (10); the pressing roller (4) rises and resets to press the basalt fiber mesh (12), the shaping component (5) is flipped to the vertical position, and the slit roller (3) rises; Step 2: Each unit of the heat sealing device is operated, the slit roller (3) rotates to slit the PE plastic rubber (11), the slitted PE plastic rubber (11) bends at the turning point at the bottom of the belt (2), and the slit is opened, the fire row burner (7) is ignited, and the PE plastic rubber (11) and the basalt fiber mesh (12) are sprayed with fire, and the flame heats the PE plastic rubber (11) at the slit and heats the basalt fiber mesh (12) at the same time; Step 3: The pressing roller (4) rotates to press the heated basalt fiber mesh (12) into the hot-melt PE plastic rubber (11), and at the same time, the oiling component (6) coats the surface of the pressing roller (4) with oil; In step 4, the PE plastic rubber (11) after being pressed into the basalt fiber mesh (12) is gradually transformed from a curved shape to a vertical shape. During the transformation process, the slits at the slits are gradually closed, and the basalt fiber mesh (12) is completely buried in the hot melt rubber of the PE plastic rubber (11); and the shaping component (5) presses the PE plastic rubber (11) after being pressed into the basalt fiber mesh (12) between the belts (2), and after pressing and shaping to form a PE plastic tarpaulin (13), the tarpaulin reeling mechanism (10) reels it upwards.

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