TPU micro-foaming sheet production equipment

Abstract

The TPU micro-foaming sheet production equipment comprises a frame body, a feeding bin, a drying bin and a storage bin which are sequentially connected are fixedly arranged on the frame body, a frame body is fixedly arranged in the feeding bin, one end of a conveyor A is connected with the feeding bin, the other end of the conveyor A extends to the storage bin through the drying bin, the frame body is located above the conveyor A, a conveyor B is located above the conveyor A, and the frame body is located above the conveyor B; the distance between the lower end face of the conveyor B and the upper end face of the conveyor A ranges from 3 mm to 50 mm, one end of the conveyor B is arranged on the side, close to the feeding bin, of the drying bin, the other end of the conveyor B extends to the storage bin, the hot-air blower is located on the lower portion of the drying bin, and an air outlet of the hot-air blower is connected with the drying bin and located on the lower portion of the conveyor A. The air outlet is formed in the upper portion of the drying bin. Conveying belts of the conveyor A and the conveyor B are nylon drying mesh belts, hot air can penetrate through the nylon drying mesh belts to directly act on TPU particles through the air permeability of the nylon drying mesh belts to dry the TPU particles, the working efficiency is high, the moisture content of the TPU particles is reduced, and the foaming quality is improved.

Description

Technical field:

[0001] The present application relates to the technical field of TPU micro-foam sheet production, and in particular to a TPU micro-foam sheet production device. Background technology:

[0002] The TPU micro-foam sheet production equipment includes a first-stage twin-screw extruder 2, a second-stage single-screw extruder 3, a supercritical carbon dioxide injection device 4, a die head 5, a three-roll calender 6, a cooling roller device 7, a traction trimming device 8 and an automatic winder 9, which are connected in sequence. The supercritical carbon dioxide injection device 4 is used to accurately inject the foaming agent into the twin-screw extruder, and the excellent plasticizing and mixing capabilities of the twin screw are used to evenly mix a trace amount of the foaming agent with the material. Through the temperature control adjustment of the single-screw extruders 2 and 3, the material reaches the strength required for foaming, and then extrude it through the die head 5 to form a micro-foam sheet with uniform pores, and then pass through the three-roll calender 6 and the cooling roller device 7 in sequence to cool and shape the sheet, and finally pass through the traction trimming device 8, and then collect the sheet into a roll through the three-station automatic winder 9.

[0003] The existing equipment directly puts TPU particles into the twin-screw extruder for melting. Since the molecular structure of TPU material particles contains many hydrophilic groups, once TPU is exposed to the air, it will slowly absorb moisture in the air. TPU particles with high water content enter the twin-screw extruder for melting, which will cause uneven subsequent foaming and seriously affect the quality of the sheet. Utility model content:

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A TPU micro-foam sheet production equipment, comprising:

[0006] A frame, on which a feed bin, a drying bin and a storage bin connected in sequence are fixedly arranged;

[0007] A material storage frame with upper and lower openings, the frame is fixedly arranged in the feed bin;

[0008] Conveyor A, one end of conveyor A is connected to the feeding bin, and the other end extends to the storage bin through the drying bin, and the frame is located above conveyor A;

[0009] Conveyor B, conveyor B is located above conveyor A, the distance between the lower end surface of conveyor B and the upper end surface of conveyor A is 3-50mm, and one end of conveyor B is set on the side of the drying bin close to the feed bin, and the other end extends to the storage bin;

[0010] Hot air blower, the hot air blower is located at the lower part of the drying bin, and the hot air blower outlet is connected to the drying bin and located at the lower part of conveyor A;

[0011] Air outlet: the air outlet is opened at the upper part of the drying chamber;

[0012] The conveyor belts of conveyor A and conveyor B are both nylon drying mesh belts.

[0013] Furthermore, the horizontal cross-sectional width of the frame is smaller than the width of conveyor A, and a discharge port is provided at the lower part of the frame near the drying bin. The height of the discharge port is the same as the distance between the lower end face of conveyor B and the upper end face of conveyor A, and the gap between the lower part of the frame and the upper end face of conveyor A is less than 2 mm.

[0014] Furthermore, conveyor A and conveyor B both include a driven roller, a driving roller, a support roller and a reduction motor. The driven roller is arranged between the driving roller and the support roller. The driven roller is connected to the driving roller through a nylon drying mesh belt, and the driving roller is connected to the output shaft of the reduction motor.

[0015] Furthermore, the drying bin includes a body and a bin cover fixed to the upper end surface of the body, the bin cover is connected to the body, and the bin cover is arranged in a trapezoidal platform structure;

[0016] The air outlet is arranged on the upper end surface of the compartment cover.

[0017] Furthermore, an exhaust fan is provided at the air outlet, and the air inlet of the exhaust fan is connected to the air outlet.

[0018] Furthermore, the hot air blower comprises a centrifugal fan, a cover body is arranged at the air outlet of the centrifugal fan in a fixed structure manner, a heating pipe is arranged in the cover body, and the other end of the cover body is connected to the drying bin.

[0019] One end of the heating tube extends to the outside of the cover body, and a protective cover for protecting the heating tube is arranged outside the cover body.

[0020] Furthermore, a bracket is fixedly arranged at the lower part of the centrifugal fan.

[0021] The beneficial effects of the utility model are as follows: a material outlet is arranged in the frame, and the nylon drying mesh belt of the conveyor A is used for conveying, so that the TPU particles in the frame are evenly dispersed on the conveyor A in thickness, and the moisture in the TPU particles is dried by a hot air blower through the air permeability of the nylon drying mesh belt, and the hot air with water vapor is discharged through the air outlet, so that the moisture content of the TPU particles is reduced and the foaming quality is improved. Description of the drawings:

[0022] Figure 1 It is a schematic diagram of the main structure of the dehumidification and drying equipment of the utility model.

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the utility model hot air blower.

[0024] Figure 3 It is a schematic diagram of the structure of the whole set of equipment of the utility model from a top view.

[0025] In the figure:

[0026] 1. Vacuum feeder, 2. First-stage twin-screw extruder, 3. Second-stage single-screw extruder, 4. Supercritical carbon dioxide injection device, 5. Special head, 6. Three-roll calender, 7. Cooling roller device, 8. Traction trimming device, 9. Three-station automatic winder, 10. Frame, 11. Feed bin, 12. Drying bin, 13. Storage bin, 14. Frame, 15. Conveyor A, 16. Conveyor B, 17. Support roller, 18. Exhaust fan, 19. Centrifugal fan, 20. Cover, 21. Heating tube, 22. Protective cover, 23. Bracket. Specific implementation method:

[0027] In order to make the purpose, technical scheme and advantages of the implementation of the utility model clearer, the utility model will now be further described in detail with reference to the accompanying drawings and the following examples so that the public can better understand the implementation method of the utility model. The specific implementation scheme of the utility model is as follows:

[0028] A TPU micro-foam sheet production equipment includes a frame 10, on which a feed bin 11, a drying bin 12 and a storage bin 13 connected in sequence are fixedly arranged, and a frame 14 is fixedly arranged in the feed bin 11, and the frame 14 is a cylindrical structure with upper and lower openings; one end of a conveyor A15 is connected to the feed bin 11, and the other end extends to the storage bin 13 through the drying bin 12, and the frame 14 is located above the conveyor A15; a conveyor B16 is located above the conveyor A15, and the distance between the lower end surface of the conveyor B16 and the upper end surface of the conveyor A15 is 3 mm in this embodiment, and in other embodiments In the embodiment, the discharge thickness can be adjusted according to the moisture content of the TPU particles. The lower the moisture content, the thicker the thickness, such as 10mm, 20mm, 30mm, 40mm, 50mm, and one end of the conveyor B16 is arranged on the side of the drying bin 12 close to the feed bin 11, and the other end extends to the storage bin 13; the conveyor belts of the conveyor A15 and the conveyor B16 are both nylon drying mesh belts. Through the air permeability of the nylon drying mesh belts, the hot air can penetrate it and directly act on the TPU particles to dry them, with high working efficiency, and the cooperation of the two conveyors can prevent the TPU particles from being blown away.

[0029] It should be noted that the horizontal cross-sectional width of the frame 14 is smaller than the width of the conveyor A15 to prevent the TPU particles from escaping from the outside of the conveyor; a discharge port is provided at the lower part of the frame 14 close to the drying bin 12, and the height of the discharge port is the same as the distance between the lower end face of the conveyor B16 and the upper end face of the conveyor A15. Except for the discharge port, the lower part of the frame 14 has a certain gap with the upper end face of the conveyor A15 to avoid contact and friction between the lower part of the frame 14 and the conveyor A15, and to ensure that the TPU particles do not leak out.

[0030] Specifically, conveyor A15 and conveyor B16 both include a driven roller, a driving roller, a support roller 17 and a reduction motor. The driven roller is arranged between the driving roller and the support roller 17. The driven roller is connected to the driving roller through a nylon drying mesh belt, and the driving roller is connected to the output shaft of the reduction motor.

[0031] The hot air blower is located at the lower part of the drying bin 12, and the air outlet of the hot air blower is connected to the drying bin 12 and is located at the lower part of the conveyor A15. The hot air blower includes a centrifugal fan 19, and a cover body 20 is arranged at the air outlet of the centrifugal fan 19 in a fixed structure manner. A heating pipe 21 is arranged in the cover body 20, and the other end of the cover body 20 is connected to the drying bin 12, and the TPU particles are dried by the hot air blower.

[0032] One end of the heating tube 21 extends to the outside of the cover body 20 , and a protective cover 22 for protecting the heating tube 21 is provided on the outside of the cover body 20 to prevent people from being injured by accidental contact.

[0033] It should be noted that a bracket 23 is fixedly provided at the lower part of the centrifugal fan 19 to increase the height and avoid dust inhalation caused by the air inlet of the centrifugal fan 19 being close to the ground.

[0034] The drying bin 12 includes a main body and a bin cover fixed on the upper end surface of the main body. The bin cover is connected to the main body and has a trapezoidal structure. The air outlet is arranged on the upper end surface of the bin cover, and an exhaust fan 18 is arranged at the air outlet. The air inlet of the exhaust fan 18 is connected to the air outlet to accelerate the discharge of water vapor.

[0035] It should be noted that each bin is separately arranged, and there is a passage between adjacent bins for the conveyor to pass through. Under the dual action of the centrifugal fan 19 and the exhaust fan 18, the water vapor entering the feed bin 11 and the storage bin 13 through the passage can be ignored.

[0036] The working principle and working process of the utility model are as follows: TPU particle raw materials are placed in the frame 14, and the conveyor A15, conveyor B16 and hot air blower are started. The TPU particles are taken out from the discharge port by the friction force of the nylon drying mesh belt. The TPU particles are conveyed into between the conveyor A15 and the conveyor B16. The centrifugal fan 19 blows the external air to the heating tube to form hot air to dehumidify the TPU particles in the conveyor. The dehumidified TPU particles are conveyed to the storage bin 13 and conveyed to the primary twin-screw extruder 2 through the vacuum feeder 1 to continue the subsequent work.

[0037] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "left", "right", "front", "back", "lower left", "upper right", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Although the present invention has been described according to a limited number of embodiments, those skilled in the art, with the benefit of the above description, should understand that other embodiments can be conceived within the scope of the present invention described thereby.

Claims

1. A TPU micro-foam sheet production equipment, characterized in that: include: A frame (10), on which a feed bin (11), a drying bin (12) and a storage bin (13) are fixedly provided, which are connected in sequence; A material storage frame (14) with upper and lower openings, the frame (14) being fixedly arranged in the material feeding bin (11); A conveyor A (15), one end of the conveyor A (15) is connected to the feed bin (11), and the other end of the conveyor A (15) extends to the storage bin (13) through the drying bin (12), and the frame (14) is located above the conveyor A (15); A conveyor B (16), the conveyor B (16) is located above the conveyor A (15), the distance between the lower end surface of the conveyor B (16) and the upper end surface of the conveyor A (15) is in the range of 3-30 mm, and one end of the conveyor B (16) is arranged on the side of the drying bin (12) close to the feeding bin (11), and the other end extends to the storage bin (13); A hot air blower, the hot air blower is located at the lower part of the drying chamber (12), and the hot air blower outlet is connected to the drying chamber (12) and is located at the lower part of the conveyor A (15); An air outlet, which is provided at the upper part of the drying chamber (12); The conveyor belts of conveyor A (15) and conveyor B (16) are both nylon drying mesh belts.

2. A TPU micro-foam sheet production equipment according to claim 1, characterized in that: The horizontal cross-sectional width of the frame (14) is smaller than the width of the conveyor A (15). A discharge port is provided at the lower portion of the frame (14) near the drying bin (12). The height of the discharge port is the same as the distance between the lower end surface of the conveyor B (16) and the upper end surface of the conveyor A (15). The gap between the lower portion of the frame (14) and the upper end surface of the conveyor A (15) is less than 2 mm.

3. A TPU micro-foam sheet production equipment according to claim 2, characterized in that: The conveyor A (15) and the conveyor B (16) both comprise a driven roller, a driving roller, a support roller (17) and a reduction motor. The driven roller is arranged between the driving roller and the support roller (17). The driven roller is connected to the driving roller via a nylon drying mesh belt. The driving roller is connected to the output shaft of the reduction motor.

4. The TPU micro-foam sheet production equipment according to claim 1, characterized in that: The drying bin (12) comprises a main body and a bin cover fixed on the upper end surface of the main body, the bin cover is connected to the main body and is arranged in a trapezoidal platform structure; The air outlet is arranged on the upper end surface of the compartment cover.

5. The TPU micro-foam sheet production equipment according to claim 4, characterized in that: An exhaust fan (18) is arranged at the air outlet, and the air inlet of the exhaust fan (18) is connected to the air outlet.

6. The TPU micro-foam sheet production equipment according to claim 1, characterized in that: The hot air blower comprises a centrifugal fan (19), a cover body (20) is arranged at the air outlet of the centrifugal fan (19) in a fixed structure manner, a heating pipe (21) is arranged in the cover body (20), and the other end of the cover body (20) is connected to the drying chamber (12); One end of the heating tube (21) extends to the outside of the cover body (20), and a protective cover (22) for protecting the heating tube (21) is arranged outside the cover body (20).

7. The TPU micro-foam sheet production equipment according to claim 6, characterized in that: A bracket (23) is fixedly arranged at the lower part of the centrifugal fan (19).

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