Environment-friendly PVC plastic sheet calender production line

Abstract

The application relates to an environment-friendly PVC plastic sheet calender production line, which comprises a machine base, a cutting mechanism, a material guiding mechanism, a calender mechanism and a cooling roller are sequentially arranged on the machine base; a portal frame is arranged on the machine base; the cutting mechanism comprises a cutter seat which is arranged on the portal frame in a lifting mode; a cutter for cutting waste materials is arranged on the cutter seat; the cutting mechanism further comprises a driving assembly arranged on the portal frame; the driving assembly is linked with the cutter seat and is used for driving the cutter seat to lift; a cutting table is arranged below the cutter seat on the machine base; a discharging mechanism is arranged between the cutting table and the material guiding mechanism; the application has the effects of realizing automatic recovery of waste materials, cleaning the waste materials more timely, improving the cleaning efficiency, guaranteeing the sheet quality and improving the production efficiency.

Description

Technical Field

[0001] This application relates to the technical field of PVC plastic sheet production equipment, and in particular to an environmentally friendly PVC plastic sheet calendering production line. Background Technology

[0002] Currently, PVC sheet calendering is the core process for producing polyvinyl chloride (PVC) sheets. First, thermoplastic plastics (such as PVC, PE, PP, PC, etc.) are heated and plasticized using an extruder. The material is then extruded from a die with a specific cross-sectional shape. The resulting material is relatively thick and uneven in thickness. Therefore, it needs to be calendered into a continuous, uniform sheet shape using one or more sets of heated rollers. The calendered sheet is then cooled by cooling rollers to set its shape and maintain dimensional stability. Finally, the cooled and shaped finished sheet is rolled into a tube.

[0003] When material is first extruded from the die, it is affected by factors such as the internal temperature of the die. At this time, the produced material is prone to instability in thickness, width, and surface quality. The edges are prone to curling and burrs, failing to meet the requirements of a finished product. Therefore, it is usually considered waste and needs to be cut off. However, calenders in related technologies typically use cutters to cut off the waste. The cut-off waste usually needs to be manually cleaned. Manual cleaning is slow and inefficient. If the waste is not removed from the machine in time, the waste remaining on the machine will cause secondary damage to the subsequent finished sheets, ultimately affecting the quality of the sheets and reducing production efficiency to some extent. Summary of the Invention

[0004] This application provides an environmentally friendly PVC plastic sheet calendering production line, which can automatically recycle waste, clean up waste more promptly, improve cleaning efficiency, ensure sheet quality, and improve production efficiency.

[0005] The environmentally friendly PVC plastic sheet calendering production line provided in this application adopts the following technical solution:

[0006] An environmentally friendly PVC plastic sheet calendering production line includes a machine base, on which a cutting mechanism, a guiding mechanism, a calendering mechanism, and a cooling roller are sequentially arranged. A gantry frame is mounted on the machine base. The cutting mechanism includes a knife holder that is lifted and lowered on the gantry frame, and a cutter for cutting waste material is mounted on the knife holder. The cutting mechanism also includes a drive assembly mounted on the gantry frame, which is linked to the knife holder and used to drive the knife holder to rise and fall. A cutting table is mounted on the machine base below the knife holder. A discharge mechanism is arranged between the cutting table and the guiding mechanism. The discharge mechanism includes a discharge plate rotatably mounted on the machine base and a discharge cylinder rotatably mounted on the machine base. The rotation shaft of the discharge plate is horizontally arranged, and the piston rod of the discharge cylinder is rotatably connected to the discharge plate. The discharge cylinder is used to drive the discharge plate to flip. A collection box is mounted on the machine base below the cutting table to collect waste material falling from the discharge plate.

[0007] Preferably, the cutter holder is provided with an extension platform located above the unloading mechanism. A pressure plate facing the unloading plate is provided on the extension platform. Multiple sets of guide rods are provided on the pressure plate, and the guide rods are movably inserted through the extension platform. A first spring is sleeved on the outside of the guide rod. The first spring extends and retracts along the length of the guide rod. One end of the first spring abuts against the extension platform, and the other end of the first spring abuts against the pressure plate. The first spring is used to push the pressure plate downward in a direction away from the extension platform.

[0008] Preferably, the cutting table has a limiting flange on the side wall facing the unloading plate, and the unloading plate has a relief groove on the side wall facing the limiting flange. The limiting flange is located on the rotation path of the relief groove. When the unloading plate is flipped to a horizontal state, the limiting flange contacts the bottom wall of the relief groove, and the upper surface of the unloading plate is in a horizontal state.

[0009] Preferably, the pressure plate is provided with positioning posts located outside the unloading plate, and the positioning posts are symmetrically arranged on both sides of the pressure plate; a material-taking plate is movably inserted between the positioning posts, and a second spring is sleeved on the positioning posts, the second spring being used to push the material-taking plate downward; when the unloading plate is flipped to a horizontal state, a retraction groove is formed between the limiting protrusion and the inner sidewall of the clearance groove, which is directly opposite to the material-taking plate, and the material-taking plate is inserted into the retraction groove, the upper surface of the material-taking plate inserted into the retraction groove being lower than the upper surface of the unloading plate; a material channel for waste material to pass through is formed between the material-taking plate and the pressure plate.

[0010] Preferably, the base is provided with a baffle seat located below the unloading plate. Multiple sets of pushers are movably arranged at intervals on the unloading plate. Each pusher is provided with a third spring, which drives the pusher to press down until the upper surface of the pusher is flush with the upper surface of the unloading plate. Rollers are rotatably provided on the side wall of the pusher facing the baffle seat, and the baffle seat is located on the path of the rollers flipping downwards.

[0011] Preferably, the material guiding mechanism includes a mounting frame mounted on a gantry frame, a material guiding seat mounted on the mounting frame, and a material guiding roller driven by a motor rotatably mounted on the material guiding seat; a first cylinder is mounted on the mounting frame, the piston rod of the first cylinder is mounted on the material guiding seat, and the first cylinder is used to drive the material guiding seat to rise and fall.

[0012] Preferably, the material guiding mechanism further includes a guide roller rotatably mounted on the machine base, the guide roller being located below the guide drum; the material guiding mechanism further includes a bidirectional lead screw rotatably mounted on the machine base, the two ends of the bidirectional lead screw being symmetrically provided with adjusting seats, the bidirectional lead screw passing through and threadedly connected to the adjusting seats; a guide rail is provided on the machine base, the length of the guide rail extending along the length direction of the bidirectional lead screw; the adjusting seats are slidably mounted on the guide rail along the length direction of the guide rail; a limit roller is rotatably mounted on the adjusting seat, the rotation axis of the limit roller being vertically arranged.

[0013] Preferably, the calendering mechanism includes a first calendering roller rotatably mounted on a machine base, and a second calendering roller mounted above the first calendering roller; a support frame is mounted on the machine base, and the support frame is symmetrically arranged on both sides of the first calendering roller; a second cylinder is mounted on the support frame, and a rotating seat is mounted on the piston rod of the second cylinder; the second calendering roller is rotatably mounted on the rotating seat, and the second cylinder is used to drive the second calendering roller to rise and fall.

[0014] Preferably, a support rod is provided between the two upright seats, and a cleaning frame is mounted on the outside of the support rod. A cleaning seat is provided at the bottom of the cleaning frame, located below the first calendering cylinder. A scraper facing the bottom wall of the first calendering cylinder is provided on the cleaning seat, and a chip discharge groove is also provided on the cleaning seat to collect waste chips falling from the first calendering cylinder. A connecting frame is provided between the cleaning frame and the guide seat, and the cleaning frame and the guide seat are linked together through the connecting frame.

[0015] Preferably, a connecting rod is also provided between the two upright seats, and a cleaning plate is rotatably provided on the outside of the connecting rod. A cleaning cloth is provided on the side wall of the cleaning plate facing the second calendering roller. A waist-shaped hole is provided through the other end of the cleaning plate. An insertion rod is provided on the cleaning frame and the insertion rod is inserted into the waist-shaped hole.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] The unloading mechanism enables automatic recycling of waste materials, making waste removal more timely, improving cleaning efficiency, ensuring sheet quality, and increasing production efficiency.

[0018] The waste material on the unloading plate can be pushed off the unloading plate more smoothly by the pusher, effectively preventing the waste material from being difficult to fall off due to being too tightly attached to the upper surface of the unloading plate.

[0019] By adjusting the spacing between the left and right limit rollers to match the width of the finished sheet, the sheet on the guide roller can be ensured to not deviate when it is conveyed backward under the limit of the limit rollers on both sides.

[0020] The scraper can clean the waste residue on the surface of the first calendering roller without stopping the equipment. The waste will eventually fall into the waste collection box. The outer surface of the second calendering roller can be wiped clean with a cleaning cloth to ensure the cleanliness of the sheet. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0022] Figure 2 yes Figure 1 A partial structural diagram highlighting the cutting mechanism is shown in the image.

[0023] Figure 3 This is a schematic diagram highlighting a portion of the unloading mechanism;

[0024] Figure 4 This is a magnified schematic diagram highlighting the partial structure of the cutting table and the unloading plate;

[0025] Figure 5 This is an enlarged schematic diagram highlighting a portion of the guard plate's structure;

[0026] Figure 6 This is a schematic diagram highlighting a portion of the material guiding mechanism;

[0027] Figure 7 This is a schematic diagram highlighting a portion of the rolling mill mechanism;

[0028] Figure 8 This is a schematic diagram highlighting a portion of the cleaning rack's structure.

[0029] Explanation of reference numerals in the attached drawings: 1. Machine base; 10. Gantry frame; 100. Smooth rod; 102. Chip collection box; 11. Cutting table; 12. Material collection box; 13. Limiting flange; 14. Guard seat; 15. Guide rail; 16. Stand base; 17. Second cylinder; 18. Rotating seat; 19. Support rod; 2. Cutting mechanism; 20. Knife holder; 21. Cutting knife; 22. Drive assembly; 220. Linkage frame; 3. Material guiding mechanism; 30. Mounting frame; 31. Material guiding seat; 32. Material guiding roller; 33. First cylinder; 34. Material guiding roller; 35. Double-acting lead screw; 350. Handwheel; 36. Adjusting seat; 37. Limiting roller; 4. Pressing... 40. Calendering mechanism; 41. First calendering roller; 5. Cooling roller; 6. Unloading mechanism; 60. Unloading plate; 61. Unloading cylinder; 62. Relief groove; 63. Pushing component; 64. Third spring; 65. Roller; 7. Extension table; 70. Pressure plate; 71. Guide rod; 72. First spring; 73. Positioning column; 730. Second spring; 74. Picking plate; 75. Relief groove; 76. Material channel; 8. Cleaning frame; 80. Cleaning seat; 81. Scraper; 82. Chip discharge groove; 83. Connecting frame; 84. Connecting rod; 85. Cleaning plate; 86. Cleaning cloth; 87. Waist-shaped hole; 88. Insert rod. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] This application discloses an environmentally friendly PVC plastic sheet calendering production line.

[0032] Reference Figure 1 , Figure 2 The environmentally friendly PVC plastic sheet calendering production line includes a machine base 1. Along the sheet discharge direction, a cutting mechanism 2, a guiding mechanism 3, a calendering mechanism 4, and multiple cooling rollers 5 are sequentially arranged on the machine base 1. A gantry frame 10 is fixedly mounted on the machine base 1. The cutting mechanism 2 includes a knife holder 20 vertically mounted on the gantry frame 10, and a cutter 21 for cutting waste material is fixedly installed on the knife holder 20.

[0033] like Figure 2As shown, the cutting mechanism 2 also includes a drive assembly 22 mounted on the gantry frame 10. The drive assembly 22 is linked to the cutter holder 20 and is used to drive the cutter holder 20 to move up and down vertically. The drive assembly 22 includes a linkage frame 220 rotatably mounted on the gantry frame 10 and a hydraulic cylinder rotatably mounted on the top of the gantry frame 10. The piston rod of the hydraulic cylinder is rotatably connected to the upper end of the linkage frame 220, and the lower end of the linkage frame 220 is rotatably connected to the cutter holder 20. Two sets of guide rods 100 are also fixedly mounted on the gantry frame 10. The two sets of guide rods 100 are symmetrically arranged on the left and right sides of the cutter holder 20. The length of the guide rods 100 is vertical, and there are two guide rods 100 in the same set, which are symmetrically arranged on the front and rear sides of the cutter holder 20.

[0034] like Figure 2 As shown, the tool holder 20 is movably mounted outside the two sets of guide rods 100 along the length of the guide rod 100. When the piston rod of the hydraulic cylinder extends, the linkage frame 220 rotates, causing the tool holder 20 to rise along the length of the guide rod 100. Conversely, when the piston rod of the hydraulic cylinder retracts, the linkage frame 220 rotates in the opposite direction, causing the tool holder 20 to move downward along the length of the guide rod 100.

[0035] like Figure 2 , Figure 3 As shown, a cutting table 11 is fixedly mounted on the machine base 1, located below the knife holder 20. A material unloading mechanism 6 is provided between the cutting table 11 and the material guiding mechanism 3. The material unloading mechanism 6 includes a material unloading plate 60 rotatably mounted on the machine base 1 and a material unloading cylinder 61 mounted on the machine base 1. The rotation axis of the material unloading plate 60 is horizontally positioned, and the material unloading cylinder 61 is located below the material unloading plate 60. The bottom of the material unloading cylinder 61 is rotatably mounted on the machine base 1, and the piston rod of the material unloading cylinder 61 rotates with the bottom of the material unloading plate 60. The material unloading cylinder 61 is used to drive the material unloading plate 60 to rotate up and down around the rotation axis.

[0036] like Figure 3 , Figure 4 As shown, the tool holder 20 is equipped with an extension platform 7 located directly above the unloading mechanism 6. A pressure plate 70 is horizontally mounted on the extension platform 7, facing the unloading plate 60. Multiple sets of guide rods 71 ​​are vertically arranged at intervals on the top of the pressure plate 70, with each set of guide rods 71 ​​parallel to each other. The top of each guide rod 71 movably passes through the extension platform 7, and a first spring 72 is sleeved on the outside of each guide rod 71. The first spring 72 extends and retracts along the length of the guide rod 71. The upper end of the first spring 72 abuts against the bottom wall of the extension platform 7, and the lower end of the first spring 72 abuts against the upper surface of the pressure plate 70. In its natural state, the first spring 72 pushes the pressure plate 70 downwards in a direction away from the extension platform 7.

[0037] like Figure 4As shown, a limiting flange 13 is integrally formed on the side wall of the cutting table 11 facing the unloading plate 60. A relief groove 62 is provided on the edge side wall of the unloading plate 60 facing the limiting flange 13. The limiting flange 13 is located on the path of the relief groove 62 as it flips upward. When the unloading plate 60 is flipped to a horizontal state, the limiting flange 13 contacts the bottom wall of the relief groove 62, and at this time the upper surface of the unloading plate 60 is in a horizontal state.

[0038] like Figure 3 , Figure 4 as well as Figure 5 As shown, two positioning posts 73 are fixedly installed on the outer wall of the pressure plate 70 facing the knife holder 20, located outside the unloading plate 60. The positioning posts 73 are vertically oriented and symmetrically arranged on the left and right sides of the pressure plate 70. A material-receiving plate 74 is movably inserted between the two positioning posts 73, and the material-receiving plate 74 is positioned below the pressure plate 70, moving up and down along the length of the positioning posts 73. A second spring 730 is sleeved on the outside of the positioning posts 73, located above the material-receiving plate 74. The second spring 730 extends and retracts along the direction of the material-receiving plate 74. The upper end of the second spring 730 abuts against the lower surface of the pressure plate 70, and the lower end of the second spring 730 abuts against the upper surface of the material-receiving plate 74. In its natural state, the second spring 730 is used to push the material-receiving plate 74 downward.

[0039] like Figure 4 , Figure 5 As shown, when the unloading plate 60 is flipped to a horizontal state, a retraction groove 75 is formed between the limiting protrusion 13 and the inner wall of the relief groove 62, which is directly opposite to the upper picking plate 74. The retraction groove 75 is used for the picking plate 74 to be inserted into the retraction groove 75 from top to bottom. When the pressure plate 70 moves down synchronously with the knife holder 20 to be in contact with the upper surface of the horizontal unloading plate 60, the picking plate 74 will be inserted into the retraction groove 75, and the bottom wall of the picking plate 74 will abut against the bottom wall of the relief groove 62. The second spring 730 is in a compressed state, and the upper surface of the picking plate 74 is lower than the upper surface of the unloading plate 60.

[0040] like Figure 4 , Figure 5 As shown, due to the presence of the second spring 730, a material channel 76 for waste material to pass through is formed between the material receiving plate 74 and the pressure plate 70. When the waste material needs to be cut, the unloading plate 60 is first flipped to a horizontal position by the unloading cylinder 61, and then the waste material is pushed onto the cutting table 11, ensuring that the waste material passes through the material channel 76, and finally placed flat on the unloading plate 60. Subsequently, the blade holder 20 is controlled to move downward, at which time the pressure plate 70 will move downward synchronously with the blade holder 20 until the pressure plate 70 presses the waste material down firmly onto the unloading plate 60, thereby ensuring the stability of the waste material during cutting and effectively preventing the waste material from lifting up during the cutting process. As the blade holder 20 moves further downward, the cutter 21 can cut the waste material.

[0041] After the waste material is cut, the cutter holder 20 will gradually move upwards. At the same time, the pressure plate 70 and the take-up plate 74 will also move upwards synchronously with the cutter holder 20. As the take-up plate 74 gradually moves upwards from the retraction groove 75, it will lift one side of the waste material upwards. At this time, the waste material will tilt. When the tilt angle of the waste material exceeds the maximum tilt angle, the waste material will slide off the take-up plate 74 under its own gravity and eventually fall completely onto the unloading plate 60. Then, the unloading cylinder 61 will flip the side of the unloading plate 60 closest to the cutting table 11 downwards. At this time, the waste material will fall off the tilted unloading plate 60 under its own gravity.

[0042] like Figure 2 , Figure 3 As shown, a collection box 12 is placed on the machine base 1 below the cutting table 11. The collection box 12 is used to collect waste material that falls from the unloading plate 60. The unloading mechanism 6 realizes automatic recycling of waste material, making waste cleaning more timely, improving cleaning efficiency, ensuring sheet quality, and improving production efficiency.

[0043] like Figure 4 , Figure 5 As shown, a baffle seat 14 is fixedly installed on the base 1 below the unloading plate 60. The upper surface of the baffle seat 14 is inclined downwards towards the collection box 12. Multiple sets of pusher members 63 are movably arranged on the unloading plate 60 at intervals along its length. A third spring 64 is sleeved on each pusher member 63 below the unloading plate 60. The third spring 64 extends and retracts along the sliding direction of the pusher member 63 on the unloading plate 60. The upper end of the third spring 64 abuts against the bottom wall of the unloading plate 60, and the lower end of the third spring 64 abuts against the pusher member 63. The third spring 64 drives the pusher member 63 to press down until the upper surface of the pusher member 63 is flush with the upper surface of the unloading plate 60. A roller 65 is rotatably installed on the bottom side wall of the baffle seat 14, and the baffle seat 14 is located on the path of the roller 65 as it rotates downwards.

[0044] When the unloading cylinder 61 flips the unloading plate 60 downwards towards the side near the cutting table 11, the roller 65 will gradually flip towards the direction of the baffle seat 14. Eventually, the roller 65 will come into contact with the inclined upper surface of the baffle seat 14. As the unloading plate 60 flips further, the roller 65 will push the third spring 64 to gradually compress. The top of the pusher 63 will protrude from the upper surface of the unloading plate 60. At this time, the waste material on the unloading plate 60 can fall off the unloading plate 60 more smoothly under the push of the pusher 63, effectively preventing the waste material from falling off smoothly due to being too tightly attached to the upper surface of the unloading plate 60.

[0045] like Figure 6As shown, the material guiding mechanism 3 includes a mounting frame 30 fixedly mounted on the gantry frame 10. A material guiding seat 31 is provided at the bottom of the mounting frame 30, and a material guiding roller 32 driven by a motor is rotatably mounted on the material guiding seat 31. A first cylinder 33 is fixedly mounted on the mounting frame 30, and the piston rod of the first cylinder 33 is fixedly mounted on the top of the material guiding seat 31. The first cylinder 33 is used to drive the material guiding seat 31 to move up and down in the vertical direction.

[0046] like Figure 6 As shown, the material guiding mechanism 3 also includes two guide rollers 34 rotatably mounted on the machine base 1, arranged horizontally side by side. The guide rollers 34 are located directly below the guide drum 32. The material guiding mechanism 3 also includes a bidirectional lead screw 35 rotatably mounted on the machine base 1, located below the guide rollers 34. The left and right ends of the bidirectional lead screw 35 are symmetrically provided with opposite external threads, and the two ends of the bidirectional lead screw 35 are symmetrically provided with adjusting seats 36. The bidirectional lead screw 35 passes through and is threadedly connected to the adjusting seats 36. The end of the bidirectional lead screw 35 is coaxially fixed with a handwheel 350 for the operator to drive the bidirectional lead screw 35 to rotate.

[0047] like Figure 6 As shown, two sets of parallel guide rails 15 are fixedly mounted on the base 1, symmetrically arranged on the front and rear sides of the adjusting seat 36. The length of the guide rails 15 extends along the length direction of the bidirectional lead screw 35. The front and rear sides of the adjusting seat 36 are slidably mounted on the corresponding guide rails 15, and the adjusting seat 36 slides along the length direction of the guide rails 15. Two limiting rollers 37 facing the guide seat 31 are rotatably mounted on the adjusting seat 36. The rotation axis of the limiting rollers 37 is vertically arranged, and the limiting rollers 37 are symmetrically arranged on the front and rear sides of the adjusting seat 36.

[0048] The operator can rotate the handwheel 350 to drive the bidirectional lead screw 35 to rotate synchronously. As the bidirectional lead screw 35 rotates, the adjusting seats 36 located on both sides of the bidirectional lead screw 35 will move synchronously towards or away from each other along the length of the guide rail 15. By adjusting the distance between the left and right limiting rollers 37 to match the width of the finished sheet, the limiting rollers 37 can ensure that the sheet on the guide roller 34 will not deviate when it is conveyed backward. By controlling the first cylinder 33 to lower the guide roller 32 into contact with the surface of the sheet on the guide roller 34, and then starting the motor to control the rotation of the guide roller 32, the sheet can be conveyed backward under the drive of the guide roller 32.

[0049] like Figure 6 , Figure 7As shown, the calendering mechanism 4 includes a first calendering roller 40 rotatably mounted on the machine base 1. The first calendering roller 40 rotates under the drive of an external motor. The calendering mechanism 4 also includes a second calendering roller 41 mounted above the first calendering roller 40. Two support seats 16 are fixedly mounted on the machine base 1, symmetrically arranged on the left and right sides of the first calendering roller 40. A second cylinder 17 is fixedly mounted on the top of each support seat 16. A rotating seat 18 is fixedly mounted on the piston rod of the second cylinder 17. The rotating shaft of the second calendering roller 41 is rotatably mounted on its respective opposite rotating seat 18. The second cylinders 17 on both sides are used to synchronously drive the second calendering roller 41 to rise and fall vertically. During operation, by passing the sheet material between the first calendering roller 40 and the second calendering roller 41, as the first calendering roller 40 rotates, the first calendering roller 40 and the second calendering roller 41 can calender the sheet material into a continuous sheet of uniform thickness.

[0050] like Figure 7 , Figure 8 As shown, multiple parallel support rods 19 are fixedly mounted between the two upright bases 16, and the length of the support rods 19 extends horizontally. A cleaning frame 8 is mounted on the outside of each support rod 19, and a cleaning seat 80 located directly below the first calendering roller 40 is fixedly mounted at the bottom of the cleaning frame 8. The upper surface of the cleaning seat 80 is curved to form a scraper 81 facing the bottom wall of the first calendering roller 40.

[0051] like Figure 7 , Figure 8 As shown, the cleaning seat 80 is also equipped with a chip discharge trough 82, which is used to collect the waste chips falling from the first calendering roller 40. A chip collection box 102 is slidably mounted on the machine base 1, located directly below the bottom opening of the chip discharge trough 82. The chip collection box 102 is used to collect the waste chips falling from the bottom opening of the chip discharge trough 82, and the chip collection box 102 can be pulled out from the machine base 1. A connecting frame 83 is fixedly installed between the cleaning frame 8 and the guide seat 31, and the cleaning frame 8 and the guide seat 31 are linked together through the connecting frame 83. When the guide seat 31 is lifted upward under the drive of the first cylinder 33, the connecting frame 83 will drive the cleaning frame 8 to rise synchronously until the scraper 81 is in contact with the bottom wall of the first calendering roller 40. As the first calendering roller 40 rotates, the scraper 81 can clean the waste chips remaining on the surface of the first calendering roller 40 without stopping the machine. The waste chips will eventually fall into the chip collection box 102.

[0052] like Figure 7 , Figure 8As shown, a horizontally arranged connecting rod 84 is fixedly installed between the two upright bases 16. A cleaning plate 85 is rotatably mounted on the outside of the connecting rod 84. A cleaning cloth 86 is detachably mounted on the side wall of the cleaning plate 85 facing the second calendering roller 41. A waist-shaped hole 87 passes through the end of the cleaning plate 85 away from the second calendering roller 41. An insertion rod 88 is fixedly mounted on the cleaning frame 8 and inserted into the waist-shaped hole 87. When the connecting frame 83 drives the cleaning frame 8 to rise synchronously, the insertion rod 88 will lift the end of the cleaning plate 85 away from the second calendering roller 41 upward along the waist-shaped hole 87. At this time, the end of the cleaning plate 85 near the second calendering roller 41 will rotate downward around the connecting rod 84 until the cleaning cloth 86 is rotated to be in contact with the outer surface of the second calendering roller 41. The outer surface of the second calendering roller 41 can be wiped and cleaned by the cleaning cloth 86, ensuring the cleanliness of the sheet.

[0053] like Figure 1 As shown, the cooling roller 5 is rotatably mounted on the machine base 1 and located behind the discharge port of the first calendering roller 40. The calendered sheet is sequentially wound around the outside of each cooling roller 5. The cooling roller 5 is used to cool and shape the calendered sheet.

[0054] The operating principle is as follows: When waste material needs to be cut, the unloading plate 60 is first flipped to a horizontal position by the unloading cylinder 61. Then, the waste material is pushed onto the cutting table 11, ensuring that it passes through the material channel 76, and finally placed flat on the unloading plate 60. Subsequently, the cutter holder 20 is controlled to move downwards. At this time, the pressure plate 70 will move downwards synchronously with the cutter holder 20 until the pressure plate 70 presses the waste material down firmly onto the unloading plate 60, thereby ensuring the stability of the waste material during cutting and effectively preventing the waste material from lifting up during the cutting process. As the cutter holder 20 moves further downwards, the cutter 21 can cut the waste material.

[0055] After the waste material is cut, the cutter holder 20 will gradually move upwards. Simultaneously, the pressure plate 70 and the take-up plate 74 will also move upwards in sync with the cutter holder 20. As the take-up plate 74 gradually moves upwards from the retraction groove 75, it will lift one side of the waste material upwards. At this point, the waste material will tilt. When the tilt angle exceeds the maximum tilt angle, the waste material will slide off the take-up plate 74 under its own gravity and eventually fall completely onto the unloading plate 60. Then, the unloading cylinder 61 will flip the side of the unloading plate 60 closest to the cutting table 11 downwards. The waste material will then fall off the tilted unloading plate 60 under its own gravity. A collection box 12 is placed on the machine base 1 below the cutting table 11. The collection box 12 is used to collect the waste material that falls off the unloading plate 60. The unloading mechanism 6 realizes automatic waste recycling, making waste cleaning more timely, improving cleaning efficiency, ensuring sheet quality, and increasing production efficiency.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An environmentally friendly PVC plastic sheet calendering production line, comprising an organic base (1), characterized in that: The machine base (1) is sequentially provided with a cutting mechanism (2), a material guiding mechanism (3), a calendering mechanism (4), and a cooling roller (5); the machine base (1) is provided with a gantry frame (10), the cutting mechanism (2) includes a knife holder (20) that is lifted and lowered on the gantry frame (10), and the knife holder (20) is provided with a cutter (21) for cutting waste material; the cutting mechanism (2) also includes a drive assembly (22) that is provided on the gantry frame (10), the drive assembly (22) is linked with the knife holder (20) and is used to drive the knife holder (20) to lift and lower; the machine base (1) A cutting table (11) is provided below the knife holder (20). A material unloading mechanism (6) is provided between the cutting table (11) and the material guiding mechanism (3). The material unloading mechanism (6) includes a material unloading plate (60) rotatably mounted on the machine base (1) and a material unloading cylinder (61) rotatably mounted on the machine base (1). The rotation axis of the material unloading plate (60) is horizontally arranged. The piston rod of the material unloading cylinder (61) is rotatably connected to the material unloading plate (60). The material unloading cylinder (61) is used to drive the material unloading plate (60) to flip. A cutting table (11) is provided on the machine base (1). The lower collection box (12) is used to collect waste material falling from the unloading plate (60); the knife holder (20) is provided with an extension platform (7) located above the unloading mechanism (6), the extension platform (7) is provided with a pressure plate (70) facing the unloading plate (60), the pressure plate (70) is provided with multiple sets of guide rods (71), the guide rods (71) are movably inserted on the extension platform (7); a first spring (72) is sleeved on the outside of the guide rod (71), the first spring (72) extends and retracts along the length direction of the guide rod (71); the first spring (72) One end of the first spring (72) abuts against the extension platform (7), and the other end of the first spring (72) abuts against the pressure plate (70). The first spring (72) is used to push the pressure plate (70) downward in the direction away from the extension platform (7). The pressure plate (70) is provided with a positioning post (73) located outside the unloading plate (60). The positioning posts (73) are symmetrically arranged on both sides of the pressure plate (70). The picking plate (74) is movably inserted between the positioning posts (73). The second spring (730) is sleeved on the positioning posts (73). The second spring (730) is used to push the picking plate (74) downward.

2. The environmentally friendly PVC plastic sheet calendering production line according to claim 1, characterized in that: The cutting table (11) is provided with a limiting flange (13) on the side wall facing the unloading plate (60), and the unloading plate (60) is provided with a relief groove (62) on the side wall facing the limiting flange (13). The limiting flange (13) is located on the rotation path of the relief groove (62). When the unloading plate (60) is flipped to a horizontal state, the limiting flange (13) and the bottom wall of the relief groove (62) come into contact with each other. At this time, the upper surface of the unloading plate (60) is in a horizontal state.

3. The environmentally friendly PVC plastic sheet calendering production line according to claim 2, characterized in that: When the unloading plate (60) is flipped to a horizontal state, a retraction groove (75) is formed between the limiting protrusion (13) and the inner sidewall of the relief groove (62), which is directly opposite to the picking plate (74). The picking plate (74) is inserted into the retraction groove (75), and the upper surface of the picking plate (74) inserted into the retraction groove (75) is lower than the upper surface of the unloading plate (60). A material channel (76) for waste material to pass through is formed between the picking plate (74) and the pressure plate (70).

4. The environmentally friendly PVC plastic sheet calendering production line according to claim 1, characterized in that: The base (1) is provided with a baffle seat (14) located below the unloading plate (60). Multiple sets of pusher parts (63) are movably arranged on the unloading plate (60) in a sequentially spaced manner. A third spring (64) is provided on the pusher part (63). The third spring (64) is used to drive the pusher part (63) to press down until the upper surface of the pusher part (63) is flush with the upper surface of the unloading plate (60). A roller (65) is rotatably provided on the side wall of the pusher part (63) facing the baffle seat (14). The baffle seat (14) is located on the path of the roller (65) flipping downward.

5. The environmentally friendly PVC plastic sheet calendering production line according to claim 1, characterized in that: The material guiding mechanism (3) includes a mounting frame (30) mounted on a gantry frame (10), a material guiding seat (31) mounted on the mounting frame (30), and a material guiding roller (32) driven by a motor rotatably mounted on the material guiding seat (31); a first cylinder (33) is mounted on the mounting frame (30), the piston rod of the first cylinder (33) is mounted on the material guiding seat (31), and the first cylinder (33) is used to drive the material guiding seat (31) to rise and fall.

6. The environmentally friendly PVC plastic sheet calendering production line according to claim 5, characterized in that: The material guiding mechanism (3) further includes a guide roller (34) rotatably mounted on the machine base (1), the guide roller (34) being located below the guide drum (32); the material guiding mechanism (3) further includes a bidirectional lead screw (35) rotatably mounted on the machine base (1), the two ends of the bidirectional lead screw (35) being symmetrically provided with adjustment seats (36), the bidirectional lead screw (35) being threaded through and connected to the adjustment seats (36); the machine base (1) is provided with a guide rail (15), the length of the guide rail (15) extending along the length direction of the bidirectional lead screw (35); the adjustment seat (36) is slidably mounted on the guide rail (15) along the length direction of the guide rail (15); a limit roller (37) is rotatably mounted on the adjustment seat (36), the rotation axis of the limit roller (37) being vertically mounted.

7. The environmentally friendly PVC plastic sheet calendering production line according to claim 6, characterized in that: The rolling mechanism (4) includes a first rolling roller (40) rotatably mounted on a machine base (1) and a second rolling roller (41) mounted above the first rolling roller (40); a stand (16) is mounted on the machine base (1), and the stand (16) is symmetrically mounted on both sides of the first rolling roller (40); a second cylinder (17) is mounted on the stand (16), and a rotating seat (18) is mounted on the piston rod of the second cylinder (17); the second rolling roller (41) is rotatably mounted on the rotating seat (18), and the second cylinder (17) is used to drive the second rolling roller (41) to rise and fall.

8. The environmentally friendly PVC plastic sheet calendering production line according to claim 7, characterized in that: A support rod (19) is provided between the two upright seats (16). A cleaning frame (8) is mounted on the outside of the support rod (19). A cleaning seat (80) is provided at the bottom of the cleaning frame (8) below the first calendering roller (40). A scraper (81) facing the bottom wall of the first calendering roller (40) is provided on the cleaning seat (80). A chip discharge groove (82) is also provided on the cleaning seat (80). The chip discharge groove (82) is used to receive the waste chips falling from the first calendering roller (40). A connecting frame (83) is provided between the cleaning frame (8) and the guide seat (31). The cleaning frame (8) and the guide seat (31) are linked through the connecting frame (83).

9. The environmentally friendly PVC plastic sheet calendering production line according to claim 8, characterized in that: A connecting rod (84) is also provided between the two upright seats (16). A cleaning plate (85) is rotatably provided on the outside of the connecting rod (84). A cleaning cloth (86) is provided on the side wall of the cleaning plate (85) facing the second calendering roller (41). A waist-shaped hole (87) is provided through the other end of the cleaning plate (85). An insertion rod (88) is provided on the cleaning frame (8). The insertion rod (88) is inserted into the waist-shaped hole (87).

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