Trimming device and trimming process used after EPP plate forming

Abstract

The invention relates to the technical field of trimming devices, and discloses a trimming device and a trimming process used after EPP plate forming, the trimming device comprises a base, a mounting frame, a conveying roller and a trimming mechanism, the mounting frame is fixedly mounted on the upper surface of the base, an upper pressing conveying mechanism is arranged in the mounting frame, the conveying roller is mounted on the upper surface of the base, and the trimming mechanism is arranged on the upper surface of the base. The trimming mechanism is installed on one side of the base, and the upper pressing conveying mechanism comprises a conveying chain, a suction cup lifting track and a negative pressure suction cup. According to the edge trimming device, the upward pressing conveying mechanism is arranged, a conveying chain is used for controlling a negative pressure suction cup to annularly move in the moving direction of the conveying chain, and the negative pressure suction cup is controlled to move to the heights of different positions through a suction cup lifting track, so that the negative pressure suction cup can press an EPP plate from the upper portion when entering a low-position track; and the EPP plate is pulled to move along with the suction cup through negative pressure between the negative pressure suction cup and the EPP plate, and therefore it is guaranteed that the EPP plate can only move in the moving direction of the negative pressure suction cup.

Description

Technical Field

[0001] The invention relates to the technical field of trimming devices, in particular to a trimming device and a trimming process for EPP plates after forming. Background Art

[0002] EPP board is a high-polypropylene foam resin material that produces countless independent bubbles through physical foaming and has excellent cushioning properties. EPP board is usually made of polypropylene particles through pre-pressing, molding, cooling, demolding and other processes. During molding, EPP material may overflow from the edge of the mold, resulting in burrs on the edge of the EPP board. Therefore, the molded EPP board needs to be trimmed.

[0003] Chinese patent CN112536839B discloses a polytetrafluoroethylene (EPP) sheet trimming device. By setting rollers and traction members, it is convenient to control the movement of the EPP sheet so that the cutting knife can cut and trim both sides of the EPP sheet. However, when using the device to trim the EPP sheet, one end of the EPP sheet needs to be connected to the traction member, which is more troublesome to operate. In addition, since the device limits the EPP sheet from the side through the clamping member, and since different positions on the side of the EPP sheet may have burrs or unevenness of different sizes, the EPP sheet may rotate and swing at a small angle when the EPP sheet is towed to move, which may cause errors in trimming by the cutting wheel. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a trimming device and a trimming process for EPP sheets after forming, which has the advantages of limiting the moving direction of the EPP sheets and does not require manual installation and traction, thereby solving the problems mentioned in the above background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A trimming device comprises a base, a mounting frame, a conveying roller and a trimming mechanism, wherein the mounting frame is fixedly mounted on the upper surface of the base, an upward pressure conveying mechanism is arranged inside the mounting frame, the conveying roller is mounted on the upper surface of the base, the trimming mechanism is mounted on one side of the base, the upward pressure conveying mechanism comprises a conveying chain, a suction cup lifting track and a negative pressure suction cup, the conveying chain is arranged above the conveying roller, and the length direction of the conveying chain is parallel to the conveying direction of the conveying roller, the negative pressure suction cup moves horizontally with the conveying chain, a sliding rod is slidably mounted on the suction cup lifting track, and the negative pressure suction cup moves up and down with the sliding rod; The suction cup lifting track includes a high-position track and a low-position track, the two ends of the high-position track and the low-position track are smoothly connected, the negative pressure suction cup gradually approaches the conveying roller when moving from the high-position track to the low-position track and squeezes with the upper surface of the EPP sheet to achieve negative pressure adsorption, and the negative pressure suction cup gradually moves away from the conveying roller when moving from the low-position track to the high-position track; A suction cup board-detaching mechanism is installed on one side of the base, and the suction cup board-detaching mechanism is used to prevent the adsorbed EPP board from moving upward along with the negative pressure suction cup.

[0006] Preferably, sprockets, conveying shafts and driving motors are provided at both ends of the conveying chain, the sprockets are meshingly connected to the conveying chains, the two ends of the conveying shafts are respectively rotatably connected to the top of the mounting frame and the upper surface of the base, and the conveying shaft is fixedly connected to the sprockets, the driving motor is fixedly mounted on the upper surface of the mounting frame, and the driving end of the driving motor is fixedly connected to one of the conveying shafts; the number of the conveying chains is not less than two, and translation tubes are equidistantly fixed on the outer side surfaces of the conveying chains, and the upper and lower ends of one side wall of the translation tubes are respectively fixedly connected to different conveying chains.

[0007] Preferably, the suction cup lifting track is arranged on the inner side of the conveying chain, and a support frame is fixedly installed between the two ends of the suction cup lifting track, and the support frame is fixedly installed on the upper surface of the base.

[0008] Preferably, an internal threaded tube is fixedly mounted on one end of the slide rod, the internal threaded tube is slidably sleeved inside the translation tube, a vertical sliding hole is opened at one end of the translation tube, and the slide rod is slidably connected to the vertical sliding hole.

[0009] Preferably, the internal thread of the internal threaded tube is connected to a threaded rod, the lower end of the threaded rod is fixedly connected to the top of the negative pressure suction cup, and the upper end of the threaded rod is fixedly mounted with a knob.

[0010] Preferably, a mounting groove is provided on the upper surface of the base, and the two ends of the conveying roller are rotatably connected to the inner walls of both sides of the mounting groove, and the adjacent conveying rollers are connected through a transmission pulley.

[0011] Preferably, the trimming mechanism includes a slide seat, a slide plate, a trimming shaft, a trimming grinding wheel, a trimming motor and a screw rod, the slide seat is fixedly mounted on a side wall of the base, the slide plate is slidably mounted on the upper surface of the slide seat, the trimming shaft is rotatably mounted on one end of the slide plate, the trimming grinding wheel is fixedly mounted on the trimming shaft, the trimming motor is fixedly mounted on the other end of the slide plate, and the driving end of the trimming motor is connected to the trimming shaft through a transmission pulley, the screw rod is rotatably connected to a side wall of the base and one end of the slide seat at the same time, and the screw rod is threadedly connected to the slide plate.

[0012] Preferably, a fixed guide wheel is provided on one side of the upper surface of the base close to the mounting frame, and an adjustable guide wheel is provided on the other side of the upper surface of the base, the adjustable guide wheel comprises a support, a guide rod, a parallel plate, a roller and a screw, the support is fixedly mounted on a side wall of the base, the guide rod is slidably mounted on both sides of the support, the parallel plate is fixedly mounted on one end of the guide rod facing the inside of the base, the roller is rotatably mounted on a side wall of the parallel plate, and the rollers are mounted on the parallel plate in a linear array, one end of the screw is rotatably connected to the parallel plate, and the screw is threadedly connected to the support.

[0013] Preferably, the suction cup detaching mechanism includes a support plate, a guide rod, a pressure plate, a pressure wheel and a bolt. The support plate is fixedly mounted on a side wall of the base, the guide rod is slidably mounted on both sides of the support plate, the pressure plate is fixedly mounted on the upper end of the guide rod, the pressure wheel is rotatably mounted on the lower surface of the pressure plate, the bolt is rotatably mounted on one end of the pressure plate, and the lower end of the bolt is threadedly connected to the support plate, and the suction cup detaching mechanism is arranged on one side of the transition position from the low-position track to the high-position track.

[0014] The present invention also discloses a trimming process for EPP sheet after forming, and the specific steps are as follows: Place the formed EPP sheet on one side of the conveyor roller; The EPP sheet moves with the conveying roller to a position close to the low-position track, and the negative pressure suction cup moving downward squeezes the upper surface of the EPP sheet, forming a negative pressure between the inner cavity of the negative pressure suction cup and the upper surface of the EPP sheet; The EPP sheet is transported by the conveying roller and the negative pressure suction cup and moved close to the trimming mechanism for trimming; When the trimmed EPP sheet approaches the other end of the low-position track, the negative pressure suction cup adsorbed on the upper surface thereof moves upward and separates from the EPP sheet.

[0015] Beneficial Effects Compared with the prior art, the present invention provides a trimming device and a trimming process for EPP sheet after forming, which has the following beneficial effects: 1. The trimming device, by setting an upper pressure conveying mechanism, uses a conveying chain to control the negative pressure suction cup to move in a circular manner along the moving direction of the conveying chain, and controls the height of the negative pressure suction cup when it moves to different positions through a suction cup lifting track, so that the negative pressure suction cup can press the EPP sheet from above when it enters the low-position track, and pulls the EPP sheet to move with the suction cup through the negative pressure between the negative pressure suction cup and the EPP sheet, thereby ensuring that the EPP sheet can only move in the moving direction of the negative pressure suction cup, so that there will be no untrimmed situation during trimming. At the same time, when using the device, it is only necessary to place the EPP sheet on the conveying roller, and the negative pressure suction cup can automatically clamp and push the EPP sheet to move during the movement process, and after the trimming is completed, the negative pressure suction cup can automatically separate from the EPP sheet, effectively reducing the degree of manual participation in the trimming operation; 2. The trimming device is provided with a translation tube, an internal threaded tube, a vertical sliding hole and a threaded rod. When the height of the slider changes, the slider slides inside the vertical sliding hole, driving the internal threaded tube and the threaded rod to move up and down inside the translation tube, thereby changing the height of the negative pressure suction cup. At the same time, since the internal threaded tube is threadedly connected to the threaded rod, the height of the negative pressure suction cup can be adjusted by rotating the threaded rod when the slider is inside the low-position track, so that EPP sheets of different thicknesses can be automatically trimmed by the trimming device; 3. The trimming device is provided with a high-position track and a low-position track. When the slider is in the low-position track, the distance between the suction cup and the base is small. At this time, the suction cup can adsorb the top of the EPP sheet. When the slider moves to the inside of the high-position track, the distance between the suction cup and the base increases. With the setting of the suction cup detaching mechanism, when the slider moves from the low-position track to the high-position track, the pressure wheel presses the upper surface of the EPP sheet, so that the EPP sheet cannot move upward with the suction cup. Therefore, after the trimming of the EPP sheet is completed, it can be quickly separated from the negative pressure suction cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is one of the three-dimensional structural schematic diagrams of the trimming device of the present invention; Figure 2 It is a three-dimensional structural cross-sectional view of the trimming device of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged local structure at point A in the middle; Figure 4 For the present invention Figure 2 A magnified schematic diagram of the local structure at B in the middle; Figure 5 For the present invention Figure 2 A magnified schematic diagram of the local structure at C in the middle; Figure 6 For the present invention Figure 2 A magnified schematic diagram of the local structure at D in the middle; Figure 7 It is a schematic diagram of the exploded structure of the trimming device of the present invention; Figure 8 This is the second schematic diagram of the three-dimensional structure of the trimming device of the present invention.

[0017] In the figure: 1. Base; 11. Mounting slot; 2. Mounting frame; 3. Upper pressure conveying mechanism; 31. Conveying chain; 32. Suction cup lifting track; 321. High-position track; 322. Low-position track; 33. Negative pressure suction cup; 331. Threaded rod; 332. Knob; 34. Translation tube; 341. Vertical slide hole; 35. Slide rod; 351. Internal threaded tube; 36. Sprocket; 37. Conveying shaft; 38. Driving motor; 39. Support frame; 4. Conveyor roller; 5. Trimming mechanism; 51. Sliding seat; 52. Slide plate; 53. Trimming shaft; 54. Trimming grinding wheel; 55. Trimming motor; 56. Screw rod; 6. Fix the guide wheel; 7. Adjustable guide wheel; 71. Support; 72. Guide rod; 73. Parallel plate; 74. Roller; 75. Screw; 8. Suction cup release mechanism; 81. Support plate; 82. Guide rod; 83. Pressing plate; 84. Pressing wheel; 85. Bolt. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8 The present invention provides a trimming device, including a base 1, a mounting frame 2, a conveying roller 4 and a trimming mechanism 5. The mounting frame 2 is fixedly mounted on the upper surface of the base 1, and an upper pressure conveying mechanism 3 is arranged inside the mounting frame 2. The conveying roller 4 is mounted on the upper surface of the base 1, and the trimming mechanism 5 is mounted on one side of the base 1. The upper pressure conveying mechanism 3 includes a conveying chain 31, a suction cup lifting track 32 and a negative pressure suction cup 33. The conveying chain 31 is arranged above the conveying roller 4, and the length direction of the conveying chain 31 is parallel to the conveying direction of the conveying roller 4. The negative pressure suction cup 33 moves horizontally with the conveying chain 31. A sliding rod 35 is slidably mounted on the suction cup lifting track 32, and the negative pressure suction cup 33 moves up and down with the sliding rod 35. The suction cup lifting track 32 includes a high track 321 and a low track 322, and the two ends of the high track 321 and the low track 322 are smoothly connected. The negative pressure suction cup 33 gradually approaches the conveying roller 4 during the movement from the high track 321 to the low track 322 and is pressed against the upper surface of the EPP sheet to achieve negative pressure adsorption. The negative pressure suction cup 33 gradually moves away from the conveying roller 4 during the movement from the low track 322 to the high track 321. A suction cup board-releasing mechanism 8 is installed on one side of the base 1 , and the suction cup board-releasing mechanism 8 is used to prevent the sucked EPP board from moving upward along with the negative pressure suction cup 33 .

[0020] As can be seen from the above, an upper pressure conveying mechanism 3 is set, and the conveying chain 31 is used to control the negative pressure suction cup 33 to move in a circular manner along the moving direction of the conveying chain 31, and the height of the negative pressure suction cup 33 when it moves to different positions is controlled by the suction cup lifting track 32, so that the negative pressure suction cup 33 can press the EPP sheet from above when it enters the low-position track 322, and the negative pressure between the negative pressure suction cup 33 and the EPP sheet pulls the EPP sheet to move with the negative pressure suction cup 33, thereby ensuring that the EPP sheet can only move in the moving direction of the negative pressure suction cup 33, so that there will be no untrimmed situation during trimming. At the same time, when using the device, it is only necessary to place the EPP sheet on the conveying roller 4, and the negative pressure suction cup 33 can automatically clamp and push the EPP sheet to move during the movement. Moreover, by setting the suction cup board-detaching mechanism 8, the negative pressure suction cup 33 can automatically separate from the EPP sheet after the trimming is completed, which effectively reduces the degree of manual participation in the trimming operation. In this embodiment, since the high-level rail 321 and the low-level rail 322 are smoothly connected, and the low-level rail 322 is only arranged directly above the conveying roller 4, and the high-level rail 321 is arranged in a C shape, when the EPP sheet is placed on one side of the conveying roller 4, the interval between the upper negative pressure suction cup 33 and the conveying roller 4 is large enough to facilitate the insertion of the EPP sheet. When the EPP sheet moves a distance on the conveying roller 4 and reaches the transition position between the high-level rail 321 and the low-level rail 322, a negative pressure suction cup 33 reaches this position through the conveying of the conveying chain 31. Under the action of the sliding rod 35, this negative pressure suction cup 33 moves downward, gradually approaches the EPP sheet and presses the EPP sheet.

[0021] When using the device, the formed EPP sheet is placed on one side of the conveying roller 4; the EPP sheet moves with the conveying roller 4 to a position close to the low-level track 322, and the negative pressure suction cup 33 moving downward squeezes the upper surface of the EPP sheet, forming a negative pressure between the inner cavity of the negative pressure suction cup 33 and the upper surface of the EPP sheet; the EPP sheet is conveyed by the conveying roller 4 and the negative pressure suction cup 33 and moves close to the trimming mechanism 5 for trimming; when the trimmed EPP sheet approaches the other end of the low-level track 322, the negative pressure suction cup 33 adsorbed on its upper surface moves upward and separates from the EPP sheet.

[0022] Embodiment 2: Figure 2 , Figure 7 and Figure 8 As shown, the difference between this embodiment and the above-mentioned embodiment lies in that sprockets 36, conveying shafts 37 and driving motors 38 are provided at both ends of the conveying chain 31, the sprockets 36 are meshingly connected with the conveying chain 31, the two ends of the conveying shaft 37 are rotatably connected with the top of the mounting frame 2 and the upper surface of the base 1 respectively, and the conveying shaft 37 is fixedly connected with the sprocket 36, the driving motor 38 is fixedly mounted on the upper surface of the mounting frame 2, and the driving end of the driving motor 38 is fixedly connected with one of the conveying shafts 37; the number of conveying chains 31 is not less than two, and translation tubes 34 are equidistantly fixed on the outer side surface of the conveying chain 31, and the upper and lower ends of one side wall of the translation tube 34 are fixedly connected with different conveying chains 31 respectively.

[0023] As can be seen from the above, the drive motor 38 drives the conveying shaft 37 to rotate, so that the sprocket 36 drives the conveying chain 31 to rotate, thereby driving the translation tube 34 connected to the conveying chain 31 to move in a circular direction in the horizontal direction. Since the number of conveying chains 31 is not less than two, the translation tube 34 is connected to different conveying chains 31 at least at two positions, which makes the translation tube 34 more stable when moving and less prone to tilting and shaking.

[0024] The suction cup lifting track 32 is arranged inside the conveying chain 31 , and a support frame 39 is fixedly installed between the two ends of the suction cup lifting track 32 , and the support frame 39 is fixedly installed on the upper surface of the base 1 .

[0025] It can be seen from the above that the suction cup lifting rail 32 can be fixed by providing the support frame 39 .

[0026] The upper surface of the base 1 is provided with a mounting groove 11 , and the two ends of the conveying roller 4 are rotatably connected to the inner walls of the mounting groove 11 , and the adjacent conveying rollers 4 are connected through a transmission pulley.

[0027] It can be seen from the above that when the EPP sheet is adsorbed by the negative pressure suction cup 33, friction occurs between the lower surface of the EPP sheet and the conveying roller 4, thereby pushing the conveying roller 4 to rotate. Through the setting of the transmission pulley, the conveying rollers 4 on both sides that are not squeezed by the negative pressure suction cup 33 will also rotate, thereby conveying the EPP sheet that is not in contact with the negative pressure suction cup 33 to move.

[0028] Embodiment 3: Figure 2 and Figure 3 As shown, the difference between this embodiment and the above embodiment is that an internal threaded tube 351 is fixedly installed at one end of the sliding rod 35, and the internal threaded tube 351 is slidably sleeved inside the translation tube 34. A vertical sliding hole 341 is opened at one end of the translation tube 34, and the sliding rod 35 is slidably connected to the vertical sliding hole 341.

[0029] As can be seen from the above, since the internal threaded tube 351 is slidably installed inside the translation tube 34, the slide rod 35 is slidably connected to the vertical slide hole 341, so that the slide rod 35 will not tilt, and can pull the internal threaded tube 351 up and down when the slide rod 35 changes height.

[0030] The internal thread of the internal threaded tube 351 is connected with a threaded rod 331 , the lower end of the threaded rod 331 is fixedly connected to the top of the negative pressure suction cup 33 , and the upper end of the threaded rod 331 is fixedly mounted with a knob 332 .

[0031] As can be seen from the above, since the threaded rod 331 is threadedly connected to the internal threaded tube 351, rotating the threaded rod 331 can adjust the height of the negative pressure suction cup 33. Therefore, when using the device to trim EPP sheets of different thicknesses, the height of the negative pressure suction cup 33 can be adjusted by rotating the threaded rod 331 when the sliding rod 35 is in the low-position track 322.

[0032] Embodiment 4: Figure 4 and Figure 5 As shown, the difference between this embodiment and the above embodiment is that the trimming mechanism 5 includes a slide 51, a slide plate 52, a trimming shaft 53, a trimming grinding wheel 54, a trimming motor 55 and a screw 56. The slide 51 is fixedly mounted on a side wall of the base 1, the slide plate 52 is slidably mounted on the upper surface of the slide 51, the trimming shaft 53 is rotatably mounted on one end of the slide plate 52, the trimming grinding wheel 54 is fixedly mounted on the trimming shaft 53, the trimming motor 55 is fixedly mounted on the other end of the slide plate 52, and the driving end of the trimming motor 55 is connected to the trimming shaft 53 through a transmission pulley, the screw 56 is rotatably connected to a side wall of the base 1 and one end of the slide 51 at the same time, and the screw 56 is threadedly connected to the slide plate 52.

[0033] As can be seen from the above, by providing the rotating screw 56 , the slide plate 52 can be slid, thereby moving the position of the trimming grinding wheel 54 , so as to facilitate trimming of EPP plates of different widths.

[0034] A fixed guide wheel 6 is provided on one side of the upper surface of the base 1 close to the mounting frame 2, and an adjustable guide wheel 7 is provided on the other side of the upper surface of the base 1. The adjustable guide wheel 7 includes a support 71, a guide rod 72, a parallel plate 73, a roller 74 and a screw 75. The support 71 is fixedly mounted on a side wall of the base 1, the guide rod 72 is slidably mounted on both sides of the support 71, the parallel plate 73 is fixedly mounted on one end of the guide rod 72 facing the inside of the base 1, the roller 74 is rotatably mounted on a side wall of the parallel plate 73, and the rollers 74 are mounted on the parallel plate 73 in a linear array, one end of the screw 75 is rotatably connected to the parallel plate 73, and the screw 75 is threadedly connected to the support 71.

[0035] As can be seen from the above, when the screw 75 is rotated, the distance between the roller 74 and the fixed guide wheel 6 changes, so that EPP sheets of different widths can be clamped. In this embodiment, the fixed guide wheel 6 and the adjustable guide wheel 7 are used to limit the EPP sheet before the negative pressure suction cup 33 squeezes the EPP sheet, which can assist in manually aligning the side of the EPP sheet.

[0036] Embodiment 5: Figure 6 As shown, the difference between this embodiment and the above embodiment is that the suction cup disengaging mechanism 8 includes a support plate 81, a guide rod 82, a pressure plate 83, a pressure wheel 84 and a bolt 85. The support plate 81 is fixedly mounted on a side wall of the base 1, the guide rod 82 is slidably mounted on both sides of the support plate 81, the pressure plate 83 is fixedly mounted on the upper end of the guide rod 82, the pressure wheel 84 is rotatably mounted on the lower surface of the pressure plate 83, the bolt 85 is rotatably mounted on one end of the pressure plate 83, and the lower end of the bolt 85 is threadedly connected to the support plate 81, and the suction cup disengaging mechanism 8 is arranged on one side of the transition position from the low-position rail 322 to the high-position rail 321.

[0037] As can be seen from the above, the height of the pressure wheel 84 can be adjusted by rotating the bolt 85, thereby limiting EPP sheets of different thicknesses, so that when the negative pressure suction cup 33 rises, the EPP sheet will not be lifted by the negative pressure suction cup 33.

[0038] Example 6: Please refer to Figure 1 - Figure 8 The present invention also discloses a trimming process for EPP sheet after forming, and the specific steps are as follows: Place the formed EPP sheet on one side of the conveying roller 4; The EPP sheet moves with the conveying roller 4 to a position close to the low-position track 322, and the negative pressure suction cup 33 moving downward squeezes the upper surface of the EPP sheet, forming a negative pressure between the inner cavity of the negative pressure suction cup 33 and the upper surface of the EPP sheet; The EPP sheet is transported by the conveying roller 4 and the negative pressure suction cup 33 and moves close to the trimming mechanism 5 for trimming; When the trimmed EPP sheet approaches the other end of the low-position track 322, the negative pressure suction cup 33 adsorbed on the upper surface thereof moves upward and separates from the EPP sheet.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A trimming device, comprising a base, a mounting frame, a conveying roller and a trimming mechanism, wherein the mounting frame is fixedly mounted on the upper surface of the base, an upward pressure conveying mechanism is arranged inside the mounting frame, the conveying roller is mounted on the upper surface of the base, and the trimming mechanism is mounted on one side of the base, characterized in that: The upper pressure conveying mechanism includes a conveying chain, a suction cup lifting track and a negative pressure suction cup. The conveying chain is arranged above the conveying roller, and the length direction of the conveying chain is parallel to the conveying direction of the conveying roller. The negative pressure suction cup moves horizontally with the conveying chain. A sliding rod is slidably installed on the suction cup lifting track, and the negative pressure suction cup moves up and down with the sliding rod. The suction cup lifting track includes a high-position track and a low-position track, the two ends of the high-position track and the low-position track are smoothly connected, the negative pressure suction cup gradually approaches the conveying roller when moving from the high-position track to the low-position track and squeezes with the upper surface of the EPP sheet to achieve negative pressure adsorption, and the negative pressure suction cup gradually moves away from the conveying roller when moving from the low-position track to the high-position track; A suction cup board-detaching mechanism is installed on one side of the base, and the suction cup board-detaching mechanism is used to prevent the adsorbed EPP board from moving upward along with the negative pressure suction cup.

2. A trimming device according to claim 1, characterized in that: Sprockets, conveying shafts and driving motors are provided at both ends of the conveying chain. The sprockets are meshingly connected to the conveying chains. The two ends of the conveying shafts are rotatably connected to the top of the mounting frame and the upper surface of the base respectively, and the conveying shaft is fixedly connected to the sprockets. The driving motor is fixedly mounted on the upper surface of the mounting frame, and the driving end of the driving motor is fixedly connected to one of the conveying shafts. The number of the conveying chains is not less than two, and translation tubes are equidistantly fixed on the outer side surfaces of the conveying chains, and the upper and lower ends of one side wall of the translation tubes are fixedly connected to different conveying chains respectively.

3. The trimming device according to claim 1, characterized in that: The suction cup lifting track is arranged on the inner side of the conveying chain, and a support frame is fixedly installed between the two ends of the suction cup lifting track, and the support frame is fixedly installed on the upper surface of the base.

4. The trimming device according to claim 2, characterized in that: An internal threaded tube is fixedly mounted on one end of the slide rod, and the internal threaded tube is slidably sleeved inside the translation tube. A vertical sliding hole is opened at one end of the translation tube, and the slide rod is slidably connected to the vertical sliding hole.

5. The trimming device according to claim 4, characterized in that: The internal thread of the internal threaded tube is connected with a threaded rod, the lower end of the threaded rod is fixedly connected to the top of the negative pressure suction cup, and the upper end of the threaded rod is fixedly installed with a knob.

6. The trimming device according to claim 1, characterized in that: The upper surface of the base is provided with a mounting groove, the two ends of the conveying roller are rotatably connected to the inner walls of the mounting groove on both sides, and the adjacent conveying rollers are connected through a transmission belt wheel.

7. The trimming device according to claim 1, characterized in that: The trimming mechanism includes a slide seat, a slide plate, a trimming shaft, a trimming grinding wheel, a trimming motor and a screw rod. The slide seat is fixedly mounted on a side wall of the base, the slide plate is slidably mounted on the upper surface of the slide seat, the trimming shaft is rotatably mounted on one end of the slide plate, the trimming grinding wheel is fixedly mounted on the trimming shaft, the trimming motor is fixedly mounted on the other end of the slide plate, and the driving end of the trimming motor is connected to the trimming shaft through a transmission pulley, the screw rod is rotatably connected to a side wall of the base and one end of the slide seat at the same time, and the screw rod is threadedly connected to the slide plate.

8. The trimming device according to claim 1, characterized in that: A fixed guide wheel is provided on one side of the upper surface of the base close to the mounting frame, and an adjustable guide wheel is provided on the other side of the upper surface of the base, the adjustable guide wheel comprises a support, a guide rod, a parallel plate, a roller and a screw, the support is fixedly mounted on a side wall of the base, the guide rod is slidably mounted on both sides of the support, the parallel plate is fixedly mounted on one end of the guide rod facing the inside of the base, the roller is rotatably mounted on a side wall of the parallel plate, and the rollers are mounted on the parallel plate in a linear array, one end of the screw is rotatably connected to the parallel plate, and the screw is threadedly connected to the support.

9. The trimming device according to claim 1, characterized in that: The suction cup detaching mechanism includes a support plate, a guide rod, a pressure plate, a pressure wheel and a bolt. The support plate is fixedly mounted on a side wall of the base, the guide rod is slidably mounted on both sides of the support plate, the pressure plate is fixedly mounted on the upper end of the guide rod, the pressure wheel is rotatably mounted on the lower surface of the pressure plate, the bolt is rotatably mounted on one end of the pressure plate, and the lower end of the bolt is threadedly connected to the support plate, and the suction cup detaching mechanism is arranged on one side of the transition position from the low-position track to the high-position track.

10. A trimming process for EPP sheet after forming, using a trimming device as claimed in any one of claims 1 to 9, characterized in that: The specific steps are: Place the formed EPP sheet on one side of the conveyor roller; The EPP sheet moves with the conveying roller to a position close to the low-position track, and the negative pressure suction cup moving downward squeezes the upper surface of the EPP sheet, forming a negative pressure between the inner cavity of the negative pressure suction cup and the upper surface of the EPP sheet; The EPP sheet is transported by the conveying roller and the negative pressure suction cup and moved close to the trimming mechanism for trimming; When the trimmed EPP sheet approaches the other end of the low-position track, the negative pressure suction cup adsorbed on the upper surface thereof moves upward and separates from the EPP sheet.

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