A thermoplastic honeycomb production line

Abstract

The present invention discloses a thermoplastic honeycomb production line for forming thermoplastic honeycomb profiles. The production line includes a thermoplastic extrusion unit, a plastic forming unit, a gluing unit, a slitting unit, a twisting unit, a gathering unit, a heat sealing unit, and a cooling and shaping unit, which are arranged in sequence. Through this production line, the profile is first formed, glued, longitudinally cut into strips, bonded, and cross-cut, thereby completing the processing and forming of the thermoplastic honeycomb profile. The present invention can produce thermoplastic honeycomb profiles of various heights according to demand, and the thickness of the vertical ribs of the thermoplastic honeycomb profile is also easy to adjust, so thermoplastic honeycomb profiles with various vertical rib thicknesses can be produced. At the same time, the size of the polygonal cavity of the honeycomb can also be adjusted. Therefore, thermoplastic honeycomb profiles with more sizes and higher load-bearing capacity can be produced through this production line. It can be widely used in the field of processing thermoplastic honeycomb profiles.

Description

Technical Field

[0001] The invention relates to the technical field of thermoplastic material processing and molding, in particular to a thermoplastic honeycomb production line. Background Art

[0002] Honeycomb plastic sheet materials have been used for over a decade and are widely used due to their numerous excellent properties, including light weight, high strength, impact resistance, aging resistance, water absorption, corrosion resistance, mildew resistance, and shock absorption. Currently, the processing methods and equipment for thermoplastic honeycomb bodies primarily utilize the technology and equipment covered by a priority patent filed in my country by the Research and Development Department of the Catholic University of Leuven on November 21, 2005. Chinese patent application number 2005800393512, entitled "Semi-enclosed thermoplastic honeycomb body and its production method and equipment," comprehensively protects the structure, processing methods, and equipment of the thermoplastic honeycomb. Consequently, domestic manufacturers currently need to purchase or license the materials from authorized Chinese agents of the research and development department. This results in high production costs for thermoplastic honeycomb sheet materials, severely hindering their widespread application. To break the monopoly of foreign technology on the production and processing of thermoplastic honeycomb materials, research and development of thermoplastic honeycomb processing technologies and methods is necessary to break down technical barriers and enhance the domestic and international competitiveness of Chinese companies. Existing longitudinally folded honeycomb profiles are difficult to fold and form as the thickness of the honeycomb ribs and the height of the honeycomb increase. Typically, the thickness of the honeycomb ribs (the outer wall of the honeycomb) is 0.50-1mm, and the height of a typical honeycomb product is 20mm. As a result, the load-bearing capacity of the honeycomb profile is significantly restricted. Summary of the Invention

[0003] The purpose of the present invention is to provide a thermoplastic honeycomb production line to change the existing thermoplastic honeycomb molding method, so as to solve the problem that the existing thermoplastic honeycomb profile processing equipment and methods can only process thermoplastic honeycombs with low height and small rib thickness, and the thermoplastic honeycomb profile has poor bearing capacity.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a thermoplastic honeycomb production line for forming thermoplastic honeycomb profiles, comprising:

[0005] A sheet extrusion unit, which extrudes the molten material to obtain a continuous plastic sheet;

[0006] The plastic forming unit causes the continuous plastic sheet to undergo plastic deformation, forming alternating transverse grooves and transverse convex grooves on the sheet, thereby obtaining a continuous profile with a transverse concave-convex structure;

[0007] The slitting unit slits the profile into multiple strips along the conveying direction of the profile and conveys them horizontally forward;

[0008] The twisting unit adjusts the horizontally conveyed strip profile, twists it vertically and conveys it forward;

[0009] The closing and forming unit closes the vertically arranged strip-shaped profiles together so that adjacent strip-shaped profiles are combined with each other to form a group of closed polygonal cavities;

[0010] The heat-sealing and shaping unit heats the band-shaped profiles brought together to form a continuous thermoplastic honeycomb profile.

[0011] The cooling and shaping unit cools the heat-sealed profile and bonds adjacent strip-shaped profiles together to form a thermoplastic honeycomb profile.

[0012] Specifically, the plastic forming unit includes a forming roller arranged on the plastic sheet transmission path and rotating around its own axis, and the surface of the forming roller is alternately distributed with forming grooves for forming transverse grooves and forming ribs for forming transverse convex grooves.

[0013] Furthermore, the torsion unit includes a torsion platform, a group of steering rollers arranged at intervals on the torsion platform, the steering rollers are arranged perpendicular to the conveying direction of the plastic profile, each steering roller is provided with a row of steering grooves, and the steering grooves on the steering rollers gradually narrow along the conveying direction of the strip profile.

[0014] To ensure that the cut profile is adjusted in the set direction, one side wall of the adjustment groove is a vertical surface, and the other side wall is a guiding inclined surface; the directions of the two adjacent adjustment grooves on the same adjustment roller are opposite.

[0015] To facilitate the closing of separated sheets, the closing and forming unit includes a closing and forming platform, a left control plate, a right control plate, an upper limit roller and a bottom support platform or support roller arranged on the closing and forming platform, and the distance between the left control plate and the right control plate gradually narrows along the conveying direction of the strip profile.

[0016] In order to ensure that the stripped profiles are bonded together and flat, the heat-sealing and shaping unit includes:

[0017] A heating device heats the closed profiles to bond the contacting profiles together;

[0018] The leveling device is used to level the strip profiles bonded together to make the profiles flat.

[0019] Furthermore, a cross-cutting device for cutting the profile transversely is provided after the cooling and shaping unit.

[0020] In order to ensure the reliability of the combination of the strip profiles, a gluing unit is further provided after the plastic forming unit, and the gluing unit applies glue to the matching overlapping surfaces of the transverse groove and the transverse convex groove.

[0021] In order to ensure the effect of profile forming, a main air suction channel is provided inside the forming roller, and a group of air suction holes connected to the main air suction channel are provided at the bottom of the forming groove; a vacuum device is provided at the main air suction channel.

[0022] Preferably, a transition frame is provided between the plastic molding unit and the gluing unit.

[0023] In order to ensure that the two adjacent strip profiles can form a closed polygonal cavity after closing, a waveform phase adjustment mechanism of the strip profile is also provided on the torsion platform before the steering roller. The waveform phase adjustment mechanism includes a front support roller and a rear support roller, a lower pressure roller pressed on the strip profile between the front support roller and the rear support roller, and the lower pressure roller is rotatably mounted on the roller mounting arm. A slider is fixedly provided at the other end of the roller mounting arm. A mounting beam is provided on the torsion platform, and a group of mounting plates are provided on the mounting beam. A rotating screw is vertically provided on the mounting plate, and a screw nut cooperating with the rotating screw is provided on the slider.

[0024] The beneficial effects of the present invention are as follows: The production line of the present invention can quickly complete the processing and forming of thermoplastic honeycomb bodies, with fewer process steps and low processing costs. The present invention can produce thermoplastic honeycomb profiles of various heights according to demand, and the thickness of the vertical ribs of the thermoplastic honeycomb profiles can also be easily adjusted, so thermoplastic honeycomb profiles with various vertical rib thicknesses can be produced. At the same time, the size of the polygonal cavity of the honeycomb body can also be adjusted. Therefore, the production line can produce thermoplastic honeycomb profiles with more sizes and higher load-bearing capacities, thereby resolving the problem that existing equipment and methods can only produce thermoplastic honeycombs with low height and small vertical rib thickness, and the thermoplastic honeycomb profiles have low load-bearing capacity and limited scope of use.

[0025] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Schematic diagram of the production line adopted in the present invention.

[0027] Figure 2 It is a side view of the forming roller in the present invention.

[0028] Figure 3 for Figure 2 A partial enlarged view of middle A.

[0029] Figure 4 It is a schematic diagram of the cooperation between the vacuum device and the forming roller in the present invention.

[0030] Figure 5 for Figure 4 A partial enlarged view of B.

[0031] Figure 6 It is a partial schematic diagram of the cooperation between the vacuum pipe and the mounting plate in the present invention.

[0032] Figure 7 Schematic diagram of the partial structure of the profile of the plastic sheet after being formed by the plastic forming unit in the present invention.

[0033] Figure 8 It is a structural schematic diagram of the glue coating machine in the present invention.

[0034] Figure 9 It is a schematic diagram of the three-dimensional structure of the first active traction roller in the present invention.

[0035] Figure 10 It is a schematic diagram of the three-dimensional structure of the first flower roller traction machine in the present invention.

[0036] Figure 11 It is a schematic diagram of the three-dimensional structure of the second flower roller traction machine in the present invention.

[0037] Figure 12 It is a schematic diagram of the three-dimensional structure of the slitting machine in the present invention.

[0038] Figure 13 It is a schematic diagram of the three-dimensional structure of the torsion platform in the present invention.

[0039] Figure 14 It is a front view of the steering roller in the present invention.

[0040] Figure 15 for Figure 14 A partial enlarged view of C in the middle.

[0041] Figure 16 It is a schematic diagram of the three-dimensional structure of the waveform phase adjustment mechanism in the present invention.

[0042] Figure 17 It is a schematic diagram of the partial assembly three-dimensional structure of the pressing roller in the present invention.

[0043] Figure 18 It is a schematic diagram of the three-dimensional structure of the gathering platform in the present invention.

[0044] Figure 19 This is a three-dimensional schematic diagram of the strip profile after cutting in step S3 of the present invention.

[0045] Figure 20 Schematic diagram of the three-dimensional structure of the strip profile after twisting in step S4 of the present invention.

[0046] Figure 21This is a schematic diagram of the three-dimensional structure after folding and forming in step S5 of the present invention. DETAILED DESCRIPTION

[0047] Examples, such as Figure 1 As shown, a thermoplastic honeycomb production line is used to form thermoplastic honeycomb profiles. The production line includes a thermoplastic extrusion unit 1, a plastic molding unit 2, a gluing unit 3, a slitting unit 4, a twisting unit 5, a gathering unit 6, a heat sealing unit 7, and a cooling and shaping unit 8, which are arranged in sequence.

[0048] The method for forming a thermoplastic honeycomb profile using the production line comprises the following steps:

[0049] S1: Sheet extrusion molding, extruding the molten material through the thermoplastic extrusion unit 1 to obtain a continuous plastic sheet;

[0050] S2: Plastic forming, the continuous plastic sheet is plastically deformed by the plastic forming unit 2, and alternately arranged transverse grooves and transverse convex grooves are formed on the sheet to obtain a continuous profile with a transverse concave-convex structure, such as Figure 7 As shown;

[0051] S3: Cutting: The profile is cut into multiple strips along the conveying direction of the profile by the cutting unit 4 and conveyed horizontally forward; the width of the cut strip is the same as the height of the thermoplastic honeycomb after processing, that is, the width of the strip is the same as the height of the thermoplastic honeycomb to be processed. Figure 19 As shown;

[0052] S4: Twisting. The parallel conveyed strip profiles are adjusted by the twisting unit 5 so that they are twisted 90 degrees to a vertical direction and conveyed forward. The twisting directions of two adjacent strip profiles are the same or opposite. Then, the waveform phase of the strip profiles is adjusted so that the bottom edges of the transverse grooves of the two adjacent strip profiles are aligned with each other or the bottom edges of the transverse grooves of the two adjacent strip profiles are aligned with the top edges of the transverse convex grooves. Figure 20 shown.

[0053] S5: Closing and forming, the vertically arranged profiles are gathered together by the closing and forming unit 6, so that the adjacent strip profiles cooperate with each other to form a group of closed polygonal cavities. The polygonal cavity in this embodiment preferably adopts but is not limited to a hexagonal structure, such as Figure 21 As shown;

[0054] S6: Heat-sealing and shaping. The heat-sealing and shaping unit 7 bonds the combined strips of profiles together to form a continuous thermoplastic honeycomb profile. Specifically, either gluing or surface welding can be used, or both methods can be used simultaneously. When gluing is used, the mating surfaces of the transverse grooves and transverse protrusions of the sheet need to be coated with glue before heat-sealing. This gluing step is preferably performed before the slitting step, with the entire sheet coated with glue for ease of processing and handling.

[0055] S7: Cooling and shaping: The heat-sealed profile is cooled by the cooling and shaping unit 8 so that adjacent strip-shaped profiles are bonded together to form a thermoplastic honeycomb profile.

[0056] The production line of the present invention and its supporting processing method flow can realize rapid prototyping of thermoplastic honeycomb profiles, and have good process stability and high product qualification rate.

[0057] In order to better understand the present invention, the present invention is described in detail below in conjunction with a specific production line structure.

[0058] The thermoplastic extrusion unit 1 of the present invention is a commonly used device in the industry. It primarily includes an extrusion die 11. Plastic particles are melted by heating and then extruded through the die opening of the extrusion die 11 to form a continuous plastic sheet 100. At this point, the plastic sheet 100 has a high degree of plasticity due to its high temperature. Under the influence of its own weight, the formed plastic sheet enters the plastic forming unit 2 below for shaping.

[0059] like Figures 2 to 6 As shown, the plastic forming unit 2 includes a forming roller 21, and the plastic sheet enters the forming roller 21 from above. The forming roller 21 is provided with a driving source and can rotate around the axial direction. The length of the forming roller 21 is not less than the width of the plastic sheet 100 extruded from the extrusion die 11. The surface of the forming roller 21 is alternately distributed with forming grooves 211 for forming transverse grooves 200 and forming ribs 212 for forming transverse convex grooves 300. The plastic sheet 100 extruded from the extrusion die 11 forms a group of alternating transverse grooves 200 and transverse convex grooves 300 under the action of the forming grooves 211 and the forming ribs 212, thereby obtaining a continuous profile 400 with a transverse concave-convex structure, as shown in FIG. Figure 7 The bottom surface of the molding groove 211 and the upper surface of the molding rib 212 have the same width.

[0060] In order to ensure that the plastic sheet 100 can be formed along the shape of the forming groove 211 after falling on the forming roller 21, and to ensure the forming effect, suction holes 213 are distributed on the bottom surface of the forming groove 211, and a main suction duct 214 is provided in the forming roller 21. The main suction duct 214 is connected to a vacuum device 22. The main suction duct 214 is sucked by the vacuum device 22, so that the suction holes 213 generate negative pressure suction, and the plastic sheet 100 falling on the forming roller 21 is sucked into the forming groove 211, so that the plastic sheet 100 can fit into the forming groove 211.

[0061] The coordination structure between the vacuum device 22 and the forming roller 21 is as follows: the vacuum device 22 is fixedly mounted on one side of the forming roller 21 and is provided with two vacuum pipes 221. The nozzles of the two vacuum pipes 221 respectively engage with the two end surfaces of the forming roller 21, and the nozzles of the vacuum pipes 221 are located on both sides of the blanking area where the plastic sheet 100 enters the forming roller 21. The forming roller 21 is provided with a main air intake duct 214 corresponding to each forming groove 211. The main air intake duct 214 is a through-hole structure arranged along the axial direction of the forming roller 21 and extending through the entire forming roller 21. The nozzles of the vacuum pipes 221 can simultaneously cover one or more main air intake ducts 214. The vacuum pipes 221 on both sides simultaneously draw air from the main air intake ducts 214, thereby ensuring uniform negative pressure within the forming groove 211. The nozzle of the vacuum pipe 221 is in contact with the end surface of the forming roller 21 and can move relative to it, that is, the forming roller 21 can rotate by overcoming the suction force of the vacuum pipe 221. Figure 5 、 Figure 6 As shown, the nozzle of the vacuum evacuation pipe 221 is connected to an elastic, wear-resistant plastic sealing ring 222 (such as silicone, polytetrafluoroethylene, etc.). The elastic, wear-resistant plastic sealing ring 222 presses against the end surface of the forming roller 21, and the two rotate in frictional engagement. Mounting plates 223 are provided on either side of the forming roller 21. The mounting plates 223 are fixedly mounted on the bearing seat (not shown) of the forming roller 21. The mounting plates 223 are provided with holes for the vacuum evacuation pipe 221 to pass through, allowing the vacuum evacuation pipe 221 to move back and forth axially. A connecting plate 224 is fixedly mounted on the elastic, wear-resistant plastic sealing ring 222. A spring guide post 225 is mounted on the connecting plate 224. The mounting plate 223 is provided with a guide post hole, through which the other end of the spring guide post 225 extends. The spring guide post 225 is provided with an ejector spring 226, which is pressed between the mounting plate 223 and the connecting plate 224. When the elastic wear-resistant plastic sealing ring 222 is worn, the ejection spring 226 ejects the connecting plate 224 so that the elastic wear-resistant plastic sealing ring 222 is always pressed against the forming roller 21 .

[0062] The above-mentioned vacuum structure is a preferred solution, but is not limited to this solution. As long as the suction structure can generate negative pressure adsorption force on the molding groove 211, it falls within the protection scope of the present invention.

[0063] In addition, in order to ensure that the plastic sheet 100 does not deviate from the forming roller 21 during the falling process, a side pressure roller 23 is provided on the feeding side of the forming roller 21. The side pressure roller 23 is a smooth roller, and its function is to guide the plastic sheet 100 so that the plastic sheet 100 rests on the forming roller 21.

[0064] In addition, the transverse groove 200 and the transverse convex groove 300 can also be formed by a structure in which the forming roller 21 and the side pressure roller 23 are meshed with each other. That is, a forming tooth structure that cooperates with the forming groove 211 is provided on the side pressure roller 23. Since this structure has particularly high requirements for the precision of the forming teeth, it is difficult to process. If the cooperation is not in place, the formed transverse groove 200 will not meet the requirements. At the same time, after forming, the plastic sheet loses its forming force and is therefore easily deformed under the action of external forces. The forming stability is poorer than that of negative pressure forming. Using a negative pressure vacuum structure, multiple forming grooves can be kept in a negative pressure state at the same time, and the formed transverse groove 200 can be adsorbed in the forming groove 211 and transported forward, thereby improving the forming stability.

[0065] After the forming roller 21, a transition frame 20 is provided. The transition frame 20 is a rectangular frame structure with a set of rotating support rollers provided on the transition frame 20. The transition frame 20 is mainly used to provide the profile 400 with a cooling time so that the profile is cooled and formed. After the transition frame 20, the profile 400 is sent to the gluing unit 3 through the profile pulling device 30 to apply hot melt glue to the mating surface of the transverse groove 200 and the transverse convex groove 300. Figure 8 As shown, the gluing unit 3 includes a gluing machine 31, which is equipped with two gluing rollers 32. The two gluing rollers 32 act on the front and back sides of the profile 400, and simultaneously apply glue to the mating overlapping surfaces of the transverse groove 200 and the transverse convex groove 300. A gluing machine structure that applies glue on one side can also be used, that is, applying glue to the mating overlapping surfaces of the transverse groove 200 or the transverse convex groove 300. To ensure reliable contact between the gluing rollers 32 and the transverse groove 200 or the transverse convex groove 300, the gluing machine 31 is also equipped with a set of guide rollers 33. This is a conventional design structure of the gluing machine 31 and will not be described in detail here.

[0066] The profile traction device 30 includes a first active traction roller 3001 and first auxiliary guide rollers 3002 located on both sides of the first active traction tube 3001. The first active traction roller 3001 is an active roller, which is connected to a driving device to drive the first active traction roller 3001 to rotate. Figure 9As shown, the first active traction roller 3001 is provided with forming grooves and forming ribs having the same structure as the forming roller 21, so that the transverse grooves 200 and transverse ribs 300 of the profile engage with the first active traction roller 3001 and drive the profile 400 forward. The first auxiliary guide roller 3002 is also connected to a drive device and rotates at the same speed as the first active traction roller 3001. Both the first active traction roller 3001 and the first auxiliary guide roller 3002 adopt an active rotation structure, which can prevent the profile 400 from being subjected to stress, stretching and deformation during transportation.

[0067] The profile 400 after being coated with glue enters the slitting unit 4, and the profile 400 is cut along the conveying direction by the slitting unit 4 to form multiple strip profiles 500, such as Figure 18 As shown, the width of the strip profile 500 is the same as the height of the thermoplastic honeycomb profile 600 to be formed. The slitting unit 4 includes a slitting machine 41, and a first pattern roller traction machine 40 between the glue coating machine 31 and the slitting machine 41. Figure 10 As shown, the first pattern roller traction machine 40 includes a main traction pattern roller 4001 and auxiliary traction rollers 4002 located on both sides of the main traction pattern roller 4001. The structure of the main traction pattern roller 4001 is the same as that of the first active traction roller 3001. The auxiliary traction roller 4002 is a smooth roller structure. The main traction pattern roller 4001 and the auxiliary traction roller 4002 are both powered rollers with the same linear speed. After the profile 400 comes out of the glue coating machine 31, it enters the auxiliary traction roller 4002 on one side, then winds around the main traction pattern roller 4001, and finally is led out from the auxiliary traction roller 4002 on the other side and enters the wind cutter 41. Figure 12 As shown, the slitting machine 41 includes an upper slitting roller 411 and a lower slitting roller 412 that cooperate with each other. The profile 400 passes between the upper slitting roller 411 and the lower slitting roller 412 to achieve slitting. The upper slitting roller 411 is provided with a set of slits 4111. The lower slitting roller 412 is a thin sheet structure that cooperates with the slits 4111 on the upper slitting roller 411 to achieve slitting. Front and rear profile guide rollers 413 and 414 are respectively provided in front and rear of the upper slitting roller 411 and the lower slitting roller 412. The slitting of the profile 400 can be completed by a single slitting machine 41. That is, the width of the strip profile 500 cut by the single slitting machine 41 is the same as the height of the thermoplastic honeycomb profile 600 to be formed. When the profile 400 is relatively wide and the strip profile 500 to be cut is relatively narrow, the pulling force applied to the profile 400 during a single cut is high, potentially causing deformation. A multi-pass slitting method can be used. That is, after a single cut, the strip profile 500 is wind-cut again until the desired width is achieved. Using multiple passes can reduce the pulling force applied to the profile 400 and prevent deformation after slitting.

[0068] When multi-pass slitting is adopted, multiple groups of slitting machines 41 are arranged at intervals on the route of the profile 400. The present invention takes two-pass slitting as an example, wherein one slitting machine 41 is arranged in the first pass, and two wind slitting machines 41 are arranged side by side in the second pass, and a second flower roller traction machine 50 is arranged between the first slitting machine 41 and the second wind slitting machine 41. The second flower roller traction machine 50 includes a second main traction flower roller 5001 and a second auxiliary traction roller 5002. The second auxiliary traction roller 5002 is provided with a first limiting groove 5003. The width of the first limiting groove 5003 is adapted to the width of the strip profile 500 after one slitting, thereby ensuring that the strip profile 500 after one slitting travels along the set route, such as Figure 11 The second slitting machine 41 differs from the first slitting machine 41 in that the upper blade roller 411 of the second air slitting machine 41 is provided with a set of second limiting grooves 4112 having the same width as the strip profile 500 after the first slitting, the front profile guide roller 413 is provided with a third limiting groove 4131 having the same width as the strip profile 500 after the first slitting, and the rear profile guide roller 414 is provided with a fourth limiting groove (not shown) having the same width as the strip profile 500 after the second slitting.

[0069] The strip-shaped profile 500 after being cut is transported forward in a horizontal direction and enters the twisting unit 5. The twisting unit 5 adjusts each strip-shaped profile 500 so that the strip-shaped profile 500 is transported in a vertical direction instead of a horizontal direction. Figure 20 As shown, the strip-shaped profile 500 is rotated 90°, and the rotation directions of two adjacent strip-shaped profiles 500 can be the same or opposite.

[0070] like Figures 13 to 15As shown, the twisting unit 5 comprises a twisting platform 51 and a set of steering rollers 52 spaced apart on the twisting platform 51. The steering rollers 52 are arranged perpendicular to the conveying direction of the strip profile 500. Each steering roller 52 is equipped with a row of steering grooves 53. The steering grooves 53 on the same steering roller are identical in structure, and adjacent steering grooves 53 can be arranged in the same or opposite directions. One sidewall of each steering groove 53 is a vertical surface 531, and the other sidewall is a guide slope 532. The strip profile 500 rests on the guide slope 532 to enter the steering roller 52 and be conveyed forward. The steering grooves 53 on adjacent steering rollers 52 gradually narrow along the conveying direction of the strip profile 500, while the slope of the guide slope 532 gradually increases until it becomes vertical. This allows the same strip profile 500 to be gradually adjusted from a horizontal position to a vertical position under the action of the steering grooves 53 on multiple steering rollers 52. At the same time, the distance between two adjacent steering grooves 53 gradually decreases along the conveying direction of the strip profile 500, so that the distance between the strip profiles 500 that finally come out of the last steering roller 52 of the torsion platform 51 is less than the width of the strip profile 500, so that in the subsequent conveying process, even if the strip profile 500 is tilted in a certain way, it will lean against the strip profile 500 on the side, and will not cause the strip profile 500 to return to the horizontal direction.

[0071] The strip profiles 500 adjusted to a vertical state enter the closing and forming unit 6, which brings the vertically arranged strip profiles 500 together so that adjacent strip profiles 500 cooperate with each other to form a group of closed polygonal cavities 700, such as Figure 21 shown.

[0072] To ensure that adjacent strips 500 form a closed polygonal cavity 700 after closing, a waveform phase adjustment mechanism 60 for the strips 500 is provided on the torsion platform 51 before the steering roller 52. This mechanism is used to adjust the travel distance of each strip 500, so that the bottom edges of the transverse grooves 200 of adjacent strips 500 align with each other, or the bottom edges of the transverse grooves 200 and the top edges of the transverse protrusions 300 of adjacent strips 500 align with each other during closing. A third pattern roller tractor 70 is provided between the waveform phase adjustment mechanism 60 and the slitting machine 41. The structure of the third pattern roller tractor 70 is identical to that of the second pattern roller tractor 50, except that the width of the first limiting groove 4003 is adapted to the width of the strip 500 after secondary slitting.

[0073] like Figure 16 、 Figure 17As shown, the waveform phase adjustment mechanism 60 includes a front support roller 6001 and a rear support roller 6002, and a downward pressure roller 6003 that presses against the strip profile 500 between the support rollers 6001 and 6002. The travel distance of the strip profile 500 is changed by adjusting the downward pressure of the downward pressure roller 6003. The specific mounting structure of the downward pressure roller 6003 is as follows: a mounting crossbeam 54 is provided on the torsion platform 51, a set of mounting plates 55 are provided on the mounting crossbeam 54, and a rotating screw 56 is vertically mounted on the mounting plates 55. The downward pressure roller 6003 is rotatably mounted on a roller mounting arm 6004. A slider 6005 is provided at one end of the roller mounting arm 6004. A screw nut (not shown) is provided on the slider 6005 to cooperate with the rotating screw 56. A rotating handle 57 is also provided at the upper end of the rotating screw 56. Operating the rotating handle 57 rotates the screw rod 56, and the screw nut drives the slider 6005 up and down, thereby adjusting the height of the pressing roller 6003. Both the front support roller 6001 and the rear support roller 6002 are provided with a fifth limiting groove 6006 adapted to the strip profile 500. To avoid a crowded arrangement where all the pressing rollers 6003 are mounted on a single mounting beam 54, multiple mounting beams 54 can be spaced apart to stagger the pressing rollers 6003 of each strip profile 500.

[0074] like Figure 18 As shown, the gathering unit 6 includes a gathering platform 61, a left control plate 62, a right control plate 63, an upper limit roller 64, and a bottom support platform or support roller 65. The width of the strip profile 500 at the inlet between the left control plate 62 and the right control plate 63 is adapted to the width of the strip profile 500 at the outlet of the twisting unit 5. The distance between the left control plate 62 and the right control plate 63 gradually narrows along the conveying direction of the profile, thereby gradually gathering the strip profile 500 together. When the strip profile 500 is discharged from the outlet of the gathering platform 61, all the strip profiles 500 are transported forward side by side. The upper limit roller 64 is used to limit the height of the strip profile 500 to prevent the strip profile 500 from being forced upward during the gathering process.

[0075] The gathered strip-shaped profiles 500 enter the heat-sealing and shaping unit 7. The hot-melt adhesive applied by the adhesive coating unit 3 to the mating overlapping surfaces of the transverse grooves 200 and transverse protrusions 300 is heated to melt, thereby bonding the two adjacent strip-shaped profiles 500 together, thereby forming a thermoplastic honeycomb profile 600. The heat-sealing and shaping unit 7 includes a heating device 71 and a leveling device 72 disposed after the heating device 71. The heating device 71 heats the gathered strip-shaped profiles 500 to melt the hot-melt adhesive and bond the contacting profiles. The leveling device 72 further leveled the bonded profiles to maintain a consistent and flat height. The leveling device 72 comprises a set of cooperating upper and lower leveling rollers 721 and 722.

[0076] A cooling and shaping unit 8 is provided after the leveling device 72 to rapidly cool the formed thermoplastic honeycomb body. The cooling and shaping unit 8 preferably employs an air cooler to cool and shape the formed thermoplastic honeycomb body using cold air. The cooling and shaping unit 8 includes a set of cooling fans 81 that blow air toward the upper and lower surfaces of the thermoplastic honeycomb body 600.

[0077] Following the cooling and shaping unit 8, a cross-cutting device 9 is provided for cutting the profile transversely into desired lengths. This device comprises at least a transverse cutter 91 that moves vertically. This structure is conventional and will not be described in detail here. The thermoplastic honeycomb profile 600 is cut into a predetermined length by the cross-cutting device 9. The vertical ribs 800 of the thermoplastic honeycomb profile 600 refer to the outer wall of the polygonal cavity 700, and the thickness of the vertical ribs 800 corresponds to the thickness of the outer wall of the polygonal cavity 700.

[0078] The heat-sealing and shaping unit 7, the cooling and shaping unit 8, and the cross-cutting device 9 are all equipped with conveyor rollers. Furthermore, a limiting structure is provided to limit the width of the thermoplastic honeycomb profile 600 to ensure the quality of the thermoplastic honeycomb profile 600. The conveyor rollers and limiting structure are of conventional design and will not be described in detail here.

[0079] Furthermore, when the heat-sealing and shaping step S6 employs surface welding, the gluing step can be omitted. The gluing unit 3 can be removed from the apparatus, and the heating device 71 in the heat-sealing and shaping unit 7 can be replaced with a surface welding device. Surface welding involves melting the upper and lower surfaces of the combined strip profile 500 together at high temperatures. Alternatively, the strip profile 500 can be joined together using both gluing and surface welding. This method includes the gluing unit 3 and utilizes a surface welding device in the heat-sealing and shaping unit 7 for heating and melting.

[0080] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described method. Any non-substantial improvements made using the method concepts and technical solutions of the present invention, or any direct application of the above-described concepts and technical solutions to other situations without modification, fall within the scope of protection of the present invention.

Claims

1. A thermoplastic honeycomb production line for forming thermoplastic honeycomb profiles, comprising: A sheet extrusion unit, which extrudes the molten material to obtain a continuous plastic sheet; The plastic forming unit causes the continuous plastic sheet to undergo plastic deformation, forming alternating transverse grooves and transverse convex grooves on the sheet, thereby obtaining a continuous profile with a transverse concave-convex structure; The slitting unit slits the profile into multiple strips along the conveying direction of the profile and conveys them horizontally forward; The twisting unit adjusts the horizontally conveyed strip profile so that it is twisted vertically and conveyed forward; the twisting unit includes a twisting platform and a group of steering rollers arranged at intervals on the twisting platform. The steering rollers are arranged perpendicular to the conveying direction of the plastic profile. Each steering roller is provided with a row of steering grooves. The steering grooves on the steering rollers gradually narrow along the conveying direction of the strip profile. The closing and forming unit closes the vertically arranged strip-shaped profiles together so that adjacent strip-shaped profiles are combined with each other to form a group of closed polygonal cavities; The heat-sealing and shaping unit heats the band-shaped profiles brought together to form a continuous thermoplastic honeycomb profile.

2. The thermoplastic honeycomb production line according to claim 1, characterized in that: A cooling and shaping unit for cooling and shaping the formed thermoplastic honeycomb profile and a cross-cutting device for cutting the continuous thermoplastic honeycomb profile transversely are further provided after the heat-sealing and shaping unit.

3. The thermoplastic honeycomb production line according to claim 1, characterized in that: The plastic forming unit comprises a forming roller arranged on a plastic sheet transmission path and rotating around its own axis. Forming grooves for forming transverse grooves and forming ribs for forming transverse convex grooves are alternately distributed on the surface of the forming roller.

4. The thermoplastic honeycomb production line according to claim 1, characterized in that: One side wall of the steering groove is a vertical surface, and the other side wall is a guiding inclined surface; the directions of two adjacent steering grooves on the same steering roller are opposite or the same.

5. The thermoplastic honeycomb production line according to claim 1, characterized in that: The closing and forming unit includes a closing and forming platform, a left control plate, a right control plate, an upper limit roller and a bottom support platform or support roller arranged on the closing and forming platform, and the distance between the left control plate and the right control plate gradually narrows along the conveying direction of the strip profile.

6. The thermoplastic honeycomb production line according to claim 1, characterized in that: The heat sealing and shaping unit comprises: Heat sealing device, which heats the gathered profiles to bond the contacting profiles together; The leveling device is used to level the strip profiles bonded together to make the profiles flat.

7. The thermoplastic honeycomb production line according to claim 1, characterized in that: A gluing unit is further provided after the plastic forming unit, and the gluing unit applies glue to the matching overlapping surfaces of the transverse groove or the transverse convex groove.

8. The thermoplastic honeycomb production line according to claim 3, characterized in that: A main air suction channel is provided inside the forming roller, and a group of air suction holes communicating with the main air suction channel are provided at the bottom of the forming groove; a vacuum device is provided at the connection of the main air suction channel.

9. The thermoplastic honeycomb production line according to claim 4, characterized in that: A waveform phase adjustment mechanism for the strip profile is also provided on the torsion platform before the steering roller. The waveform phase adjustment mechanism includes a front support roller and a rear support roller, a downward pressure roller pressed on the strip profile between the front support roller and the rear support roller, and the downward pressure roller is rotatably mounted on the roller mounting arm. A slider is fixedly provided on the other end of the roller mounting arm. A mounting beam is provided on the torsion platform, and a group of mounting plates are provided on the mounting beam. A rotating screw is vertically provided on the mounting plate, and a screw nut cooperating with the rotating screw is provided on the slider.

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