A method for foaming environmentally friendly polyurethane foam

Abstract

This invention belongs to the field of polyurethane foam technology, specifically an environmentally friendly polyurethane foam foaming method, including the following steps: taking appropriate amounts of catalyst, foam stabilizer, foaming agent, cell opener, and flame retardant as required; through the structural design of the scraper, after mixing and stirring, the material will remain on the inner wall of the barrel and be difficult to clean; starting the second motor, the second motor drives the second rotating column to rotate, the second rotating column drives the third gear to rotate, the third gear drives the ring gear and scraper to rotate, the scraper can clean the inner wall of the barrel, scraping off the material adhering to the inner wall of the barrel; at the same time, the first bevel gear and the second bevel gear can drive the first rotating plate to rotate, the first rotating plate drives the piston rod and piston block to reciprocate in the piston cylinder through the connecting rod and the horizontal plate, which can continuously input air into the water tank, the air pressure in the water tank increases, and water can be delivered into the horizontal pipe and discharged from the outlet to clean the stirring rod.

Description

Technical Field

[0001] This invention relates to the field of polyurethane foam technology, specifically an environmentally friendly polyurethane foam foaming method. Background Technology

[0002] Polyurethane foam is made by polymerizing and foaming isocyanates and hydroxyl compounds. Polyurethane foam has excellent elasticity, softness, elongation and compressive strength, good chemical stability, resistance to many solvents and oils, excellent wear resistance, and also has excellent processability, heat insulation and adhesion properties. Mixing and stirring devices are required in the production process of polyurethane foam.

[0003] Existing mixing devices typically consist of a mixing tank, a motor, a mixing shaft, and a mixing rod. Multiple raw materials to be mixed are put into the mixing tank, the motor is started, and the motor drives the mixing shaft and mixing rod to rotate. The mixing rod can mix and stir the multiple raw materials.

[0004] However, current mixing devices cannot remove residual material from the inner wall of the mixing tank and the mixing rod. After mixing, material remains on the inner wall of the mixing tank and the mixing rod, which is difficult to clean. Therefore, an environmentally friendly polyurethane foam foaming method is proposed to address the above problems. Summary of the Invention

[0005] The technical solution adopted by this invention to solve its technical problem is: a foaming method for environmentally friendly polyurethane foam, comprising the following steps:

[0006] S1: Take appropriate amounts of catalyst, foam stabilizer, foaming agent, cell opener and flame retardant as required, add them to the mixing and stirring device, and mix the materials thoroughly and evenly through the mixing and stirring device at a certain speed to obtain mixture X. Cool mixture X to 15℃ and set aside.

[0007] S2: Add an appropriate amount of isocyanate to the mixing and stirring device as required, so that mixture X and isocyanate are fully mixed and homogeneous to obtain mixture Y;

[0008] S3: Use a high-pressure foaming machine to mix the mixture Y obtained in S2 with the polymeric isocyanate to prepare polyurethane foam.

[0009] Preferably, the mixing and stirring device in S1 specifically comprises: a barrel body, four support columns fixedly connected to the bottom of the barrel body, a feed pipe fixedly connected to the top of the barrel body, a discharge pipe fixedly connected to the bottom of the barrel body, valves installed on both the feed pipe and the discharge pipe, a first support frame fixedly connected to the top of the barrel body, a first motor fixedly connected to the first support frame, a first rotating column fixedly connected to the output shaft of the first motor, the bottom end of the first rotating column being rotatably connected to the top of the barrel body via a bearing, a first gear fixedly connected to the surface of the first rotating column, a stirring shaft rotatably connected to the barrel body via a bearing, a second gear fixedly connected to the surface of the stirring shaft, the second gear meshing with the first gear, and multiple stirring rods fixedly connected to the surface of the stirring shaft.

[0010] Preferably, a second support frame is fixedly connected to the top of the barrel, a second motor is fixedly connected to the second support frame, a second rotating column is fixedly connected to the output shaft of the second motor, the second rotating column is rotatably connected to the barrel through a bearing, a third gear is fixedly connected to the bottom end of the second rotating column, and a ring gear is rotatably connected to the inner wall of the barrel, with two scrapers fixedly connected to the ring gear, and the scrapers contacting the inner wall of the barrel.

[0011] Preferably, a first fixing plate is fixedly connected to the top of the barrel, and a first rotating shaft is rotatably connected to the first fixing plate via a bearing. A first bevel gear is fixedly connected to one end of the first rotating shaft, and a second bevel gear is fixedly connected to the surface of the second rotating column. The second bevel gear meshes with the first bevel gear. A first rotating plate is fixedly connected to the other end of the first rotating shaft, and a connecting rod is rotatably connected to the first rotating plate via a pin. A horizontal plate is rotatably connected to the top end of the connecting rod via a pin. A piston cylinder is provided above the barrel, and a piston rod is slidably inserted into the piston cylinder. The top end of the piston rod is fixedly connected to the horizontal plate, and a piston block is fixedly connected to the bottom end of the piston rod. An air inlet pipe is connected and fixedly connected to the piston cylinder, and an air inlet one-way valve is installed on the air inlet pipe. An air outlet pipe is connected and fixedly connected to the piston cylinder, and an air outlet one-way valve is installed on the air outlet pipe.

[0012] Preferably, four support rods are fixedly connected to the top of the barrel, and a water tank is fixedly connected to the top of the four support rods. The piston cylinder is fixedly connected to the water tank via a mounting plate. The air outlet pipe is connected to the water tank. A water inlet pipe is connected to the water tank. A water outlet pipe is connected to the water tank. A connecting block is fixedly connected to one end of the water outlet pipe. The bottom of the connecting block is rotatably connected to the top of the stirring shaft via a bearing. A water inlet channel is provided inside the stirring shaft. A horizontal pipe is fixedly connected to the top of the stirring rod. One end of the horizontal pipe is connected to the water inlet channel. Multiple water outlet holes are provided on the horizontal pipe.

[0013] Preferably, a plurality of arc-shaped pipes communicating with the water outlet are fixedly connected to the horizontal pipe, and four blocking membranes are fixedly connected to the inner wall of one end of the horizontal pipe and the arc-shaped pipes. The blocking membranes are elastic and used to block water. An arc-shaped guide plate is fixedly connected to the horizontal pipe.

[0014] Preferably, a second fixing plate is fixedly connected to the top of the barrel, and a second rotating shaft is rotatably connected to the second fixing plate via a bearing. A third bevel gear is fixedly connected to one end of the second rotating shaft, and the third bevel gear meshes with the second bevel gear. A second rotating plate is fixedly connected to the other end of the second rotating shaft. Two guide rods are fixedly connected to the top of the barrel, and a lifting block is slidably connected to the two guide rods. A limit opening is provided on the lifting block. A fixing column is fixedly connected to the second rotating plate, and the fixing column is slidably connected within the limit opening. Two connecting plates are fixedly connected to the lifting block, and a fixing rod is fixedly connected to one end of the connecting plate. Two L-shaped plates are fixedly connected to the top of the barrel, and a folding plate is rotatably connected to the L-shaped plates via a vertical plate and a pin. A slope is provided at the bottom of one end of the folding plate. The fixing rod is located below one end of the folding plate. A connecting column is fixedly connected to the folding plate, and an impact ball is fixedly connected to one end of the connecting column. A spring is fixedly connected between the top of the L-shaped plate and the folding plate.

[0015] Preferably, the inner wall of the barrel is provided with an annular groove, and four sliders are fixedly connected to the annular gear, the sliders being slidably connected in the annular groove.

[0016] Preferably, the piston cylinder has a first circular hole at its top, and the piston rod slides through the first circular hole.

[0017] Preferably, the lifting block has two second circular holes, and the guide rod passes through the second circular holes.

[0018] The advantages of this invention are:

[0019] 1. This invention, through the structural design of the scraper, addresses the issue that after mixing and stirring, material residue remains on the inner wall of the mixing tank and is difficult to clean. The second motor is activated, driving the second rotating column to rotate. The second rotating column drives the third gear to rotate, which in turn drives the ring gear and scraper to rotate. The scraper cleans the inner wall of the tank, removing the material adhering to it. Simultaneously, the first and second bevel gears drive the first rotating plate to rotate. The first rotating plate, through a connecting rod and a horizontal plate, drives the piston rod and piston block to reciprocate within the piston cylinder. This continuously introduces air into the water tank, increasing the air pressure and allowing water to be pumped into the horizontal pipe and discharged from the outlet, cleaning the stirring rod. This solves the problem that current mixing devices cannot remove residual material from the inner wall of the mixing tank and the stirring rod.

[0020] 2. Through the structural design of the impact ball, the present invention enables the second rotating shaft and the second rotating plate to rotate during the scraper cleaning of the inner wall of the barrel. The second rotating plate drives the lifting block to reciprocate in the vertical direction through the fixed column and the limiting port. The lifting block drives the fixed rod to move. During the downward movement of the fixed rod, the fixed rod will press one end of the folded plate, the spring is compressed, and the impact ball moves away from the stirring shaft. When the fixed rod is not in contact with the folded plate, under the action of the spring, the impact ball suddenly hits the stirring shaft. The impact generates vibration, which can make the material on the stirring rod fall down quickly. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a cross-sectional view of the barrel body of the present invention;

[0024] Figure 3 This is one of the partial three-dimensional structural schematic diagrams of the present invention;

[0025] Figure 4 This is a schematic cross-sectional view of the piston cylinder of the present invention;

[0026] Figure 5 This is a front view of the barrel body of the present invention;

[0027] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0028] Figure 7 This is a schematic cross-sectional view of the horizontal tube of the present invention;

[0029] Figure 8 This is a second partial three-dimensional structural schematic diagram of the present invention;

[0030] Figure 9 This is a front view schematic diagram of the lifting block of the present invention.

[0031] In the diagram: 1. Barrel body; 2. Support column; 3. Feed pipe; 4. Discharge pipe; 5. First support frame; 6. First motor; 7. First rotating column; 8. First gear; 9. Stirring shaft; 10. Second gear; 11. Third bevel gear; 12. Stirring rod; 13. Second support frame; 14. Second motor; 15. Second rotating column; 16. Third gear; 17. Ring gear; 18. Scraper; 19. First fixed plate; 20. First rotating shaft; 21. First bevel gear; 22. Second bevel gear; 23. First rotating plate; 24. Connecting rod; 25. Horizontal plate; 26. Piston cylinder; 27. Piston rod; 28. Piston block; 29. ​​Air inlet pipe; 30. One-way air inlet. 31. Valve; 32. Air outlet pipe; 33. Air outlet check valve; 34. Support rod; 35. Water tank; 36. Water inlet pipe; 37. Water outlet pipe; 38. Connecting block; 39. Water inlet channel; 40. Horizontal pipe; 41. Water outlet hole; 42. Baffle membrane; 43. Arc-shaped pipe; 44. Arc-shaped guide plate; 45. Second fixed plate; 46. Second rotating shaft; 47. Guide rod; 48. Lifting block; 49. Limiting port; 50. Fixed column; 51. Connecting plate; 52. Fixed rod; 53. L-shaped plate; 54. Folded plate; 55. Connecting column; 56. Impact ball; 57. Spring; 58. Annular groove; 59. Slider; 60. First round hole; 61. Second round hole. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1-4 As shown, an environmentally friendly polyurethane foam foaming method includes the following steps:

[0034] S1: Take appropriate amounts of catalyst, foam stabilizer, foaming agent, cell opener and flame retardant as required, add them to the mixing and stirring device, and mix the materials thoroughly and evenly through the mixing and stirring device at a certain speed to obtain mixture X. Cool mixture X to 15℃ and set aside.

[0035] S2: Add an appropriate amount of isocyanate to the mixing and stirring device as required, so that mixture X and isocyanate are fully mixed and homogeneous to obtain mixture Y;

[0036] S3: Use a high-pressure foaming machine to mix the mixture Y obtained in S2 with the polymeric isocyanate to prepare polyurethane foam.

[0037] The mixing and stirring device in S1 specifically comprises: a barrel body 1, a first motor 6, a first gear 8, a stirring shaft 9, a second gear 10, and a stirring rod 12. Four support columns 2 are fixedly connected to the bottom of the barrel body 1. A feed pipe 3 is fixedly connected to the top of the barrel body 1, through which various raw materials are fed into the barrel body 1. A discharge pipe 4 is fixedly connected to the bottom of the barrel body 1. Valves are installed on both the feed pipe 3 and the discharge pipe 4. A first support frame 5 is fixedly connected to the top of the barrel body 1, and a first motor 6 is fixedly connected to the first support frame 5. A first rotating column 7 is fixedly connected to the output shaft of the first motor 6. The bottom end of the first rotating column 7 is rotatably connected to the top of the barrel 1 via a bearing. A first gear 8 is fixedly attached to the surface of the first rotating column 7. When the first motor 6 is started, the first motor 6 drives the first rotating column 7 and the first gear 8 to rotate. A stirring shaft 9 is rotatably connected to the barrel 1 via a bearing. A second gear 10 is fixedly attached to the surface of the stirring shaft 9. The second gear 10 meshes with the first gear 8. The first gear 8 drives the second gear 10 and the stirring shaft 9 to rotate. A plurality of stirring rods 12 are fixedly attached to the surface of the stirring shaft 9. The second stirring shaft 9 drives the stirring rods 12 to rotate. The stirring rods 12 mix and stir the various raw materials.

[0038] A second support frame 13 is fixedly connected to the top of the barrel 1. A second motor 14 is fixedly connected to the second support frame 13. A second rotating column 15 is fixedly connected to the output shaft of the second motor 14. The second rotating column 15 is rotatably connected to the barrel 1 through a bearing. A third gear 16 is fixedly connected to the bottom end of the second rotating column 15. After mixing and stirring, the mixture is discharged from the discharge pipe 4 into the barrel 1. Material will adhere to the inner wall of the barrel 1 and the stirring rod 12. The second motor 14 is started, and the second motor 14 drives the second rotating column 15 and the third gear 16 to rotate. A ring gear 17 is rotatably connected to the inner wall of the barrel 1. Two scrapers 18 are fixedly connected to the ring gear 17. The scrapers 18 contact the inner wall of the barrel 1. The third gear 16 drives the ring gear 17 and the scrapers 18 to rotate. The scrapers 18 clean the inner wall of the barrel 1 and scrape off the material adhering to the inner wall of the barrel 1.

[0039] A first fixing plate 19 is fixedly connected to the top of the barrel 1. A first rotating shaft 20 is rotatably connected to the first fixing plate 19 via a bearing. A first bevel gear 21 is fixedly connected to one end of the first rotating shaft 20. A second bevel gear 22 is fixedly connected to the surface of the second rotating column 15, and the second bevel gear 22 meshes with the first bevel gear 21. A first rotating plate 23 is fixedly connected to the other end of the first rotating shaft 20. During the rotation of the scraper 18, the second rotating column 15 drives the first rotating shaft 20 to rotate through the second bevel gear 22 and the first bevel gear 21. The first rotating shaft 20 drives the first rotating plate 23 to rotate. A connecting rod 24 is rotatably connected to the first rotating plate 23 via a pin. A horizontal plate 25 is rotatably connected to the top of the connecting rod 24 via a pin. A piston cylinder 26 is provided above the 1, and a piston rod 27 is slidably inserted into the piston cylinder 26. The top end of the piston rod 27 is fixedly connected to the horizontal plate 25. The first rotating plate 23 drives the horizontal plate 25 and the piston rod 27 to reciprocate in the vertical direction through the connecting rod 24. A piston block 28 is fixedly connected to the bottom end of the piston rod 27, and the piston rod 27 drives the piston block 28 to move. An air inlet pipe 29 is connected and fixedly connected to the piston cylinder 26. An air inlet one-way valve 30 is installed on the air inlet pipe 29. An air outlet pipe 31 is connected and fixedly connected to the piston cylinder 26. An air outlet one-way valve 32 is installed on the air outlet pipe 31. Due to the function of the air inlet one-way valve 30 and the air outlet one-way valve 32, the piston cylinder 26 can continuously supply air to the water tank 34, and the air pressure in the water tank 34 increases.

[0040] Four support rods 33 are fixedly connected to the top of the barrel 1, and a water tank 34 is fixedly connected to the top of the four support rods 33. The piston cylinder 26 is fixedly connected to the water tank 34 via a mounting plate. The air outlet pipe 31 is connected to the water tank 34. A water inlet pipe 35 is connected to the water tank 34, and a water outlet pipe 36 is connected to the water tank 34. A connecting block 37 is fixedly connected to one end of the water outlet pipe 36. The bottom of the connecting block 37 is rotatably connected to the top of the stirring shaft 9 via a bearing. The stirring shaft 9 has a water inlet channel 38, and the top of the stirring rod 12 is fixedly connected to a horizontal tube 39. One end of the horizontal tube 39 is connected to the water inlet channel 38, and multiple water outlet holes 40 are opened on the horizontal tube 39. When the air pressure in the water tank 34 increases, the water in the water inlet channel 38 and the horizontal tube 39 can push open the barrier membrane 41 when the piston block 28 descends each time, and the water will continuously enter the horizontal tube 39. The water will continuously spray out from the water outlet holes 40 and the arc-shaped tube 42.

[0041] Multiple arc-shaped pipes 42 connected to the water outlet 40 are fixedly connected to the horizontal pipe 39. Four blocking membranes 41 are fixedly connected to the inner wall of one end of the horizontal pipe 39 and the arc-shaped pipes 42. The blocking membranes 41 are elastic and used to block the water. An arc-shaped guide plate 43 is fixedly connected to the horizontal pipe 39. When the air pressure in the water tank 34 increases, the water in the water inlet channel 38 and the horizontal pipe 39 can push aside the blocking membranes 41 when the piston block 28 descends. The water sprayed out of the arc-shaped pipes 42 is guided by the arc-shaped guide plate 43 and sprayed onto the stirring rod 12 to wash away the material attached to the stirring rod 12.

[0042] A second fixing plate 44 is fixedly connected to the top of the barrel body 1. A second rotating shaft 45 is rotatably connected to the second fixing plate 44 via a bearing. A third bevel gear 11 is fixedly connected to one end of the second rotating shaft 45, and the third bevel gear 11 meshes with a second bevel gear 22. A second rotating plate 46 is fixedly connected to the other end of the second rotating shaft 45. A second rotating column 15 drives the second rotating shaft 45 to rotate through the second bevel gear 22 and the third bevel gear 11. The second rotating shaft 45 drives the second rotating plate 46 to rotate. Two guide rods 47 are fixedly connected, and a lifting block 48 is slidably connected to the two guide rods 47. A limit port 49 is provided on the lifting block 48. A fixing post 50 is fixedly connected to the second rotating plate 46, and the fixing post 50 is slidably connected within the limit port 49. The second rotating plate 46 drives the lifting block 48 to reciprocate vertically through the fixing post 50. Two connecting plates 51 are fixedly connected to the lifting block 48, and a fixing rod 52 is fixedly connected to one end of each connecting plate 51. The lifting block 48 drives the connecting plates 51 and... The fixed rod 52 reciprocates vertically. When the fixed rod 52 moves upward, it contacts the inclined surface of the folded plate 54. Two L-shaped plates 53 are fixedly connected to the top of the barrel 1. Folded plates 54 are rotatably connected to the L-shaped plates 53 via vertical plates and pins. One end of the folded plate 54 has an inclined surface. The fixed rod 52 is located below one end of the folded plate 54. A connecting post 55 is fixedly connected to the folded plate 54. An impact ball 56 is fixedly connected to one end of the connecting post 55. The L-shaped plate 54... A spring 57 is fixed between the top of the 3 and the folded plate 54. When the fixing rod 52 presses the folded plate 54, the spring 57 is stretched, and the fixing rod 52 can move upward smoothly. When the fixing rod 52 moves downward, it can press one end of the folded plate 54, and the spring 57 is compressed. When the fixing rod 52 is not in contact with the folded plate 54, the folded plate 54 will suddenly move back under the action of the spring 57, and the impact ball 56 will impact the stirring shaft 9. The impact generates vibration, which can accelerate the material falling off the stirring rod 12.

[0043] The inner wall of the barrel 1 is provided with an annular groove 58. Four sliders 59 are fixedly connected to the annular gear 17. The sliders 59 are slidably connected in the annular groove 58. During the movement of the scraper 18, the sliders 59 slide in the annular groove 58, which plays a limiting role.

[0044] The piston cylinder 26 has a first circular hole 60 at its top. The piston rod 27 slides through the first circular hole 60. During the movement of the piston block 28, the piston rod 27 slides in the first circular hole 60, limiting the piston block 28 in the vertical direction.

[0045] The lifting block 48 has two second circular holes 61, and the guide rod 47 passes through the second circular holes 61. During the movement of the lifting block 48, the guide rod 47 slides in the second circular holes 61, limiting the lifting block 48 in the vertical direction.

[0046] Working principle: During use, multiple raw materials are fed into the barrel 1 through the feed pipe 3. The first motor 6 is started, which drives the first rotating column 7 and the first gear 8 to rotate. The first gear 8 drives the second gear 10 and the stirring shaft 9 to rotate. The second stirring shaft 9 drives the stirring rod 12 to rotate, and the stirring rod 12 mixes and stirs the multiple raw materials. After mixing and stirring, the mixture is discharged from the barrel 1 through the discharge pipe 4. Material will adhere to the inner wall of the barrel 1 and the stirring rod 12. The second motor 14 is started, which drives the second rotating column 15 and the third gear 16 to rotate. The third gear 16 drives the ring gear 17 and the scraper. As scraper 18 rotates, it cleans the inner wall of barrel 1, scraping off the material adhering to the inner wall. During the rotation of scraper 18, the second rotating column 15 drives the first rotating shaft 20 to rotate via the second bevel gear 22 and the first bevel gear 21. The first rotating shaft 20 drives the first rotating plate 23 to rotate. The first rotating plate 23 drives the horizontal plate 25 and piston rod 27 to reciprocate in the vertical direction via the connecting rod 24. The piston rod 27 drives the piston block 28 to move. Due to the action of the air inlet check valve 30 and the air outlet check valve 32, the piston cylinder 26 can continuously supply air to the water tank 34, increasing the air pressure inside the water tank 34 and opening the water inlet channel. Water in the horizontal tube 38 and 39 can push aside the obstruction of the blocking membrane 41 each time the piston block 28 descends, allowing water to continuously enter the horizontal tube 39. Water will continuously spray out from the water outlet 40 and the arc-shaped tube 42. The water sprayed from the arc-shaped tube 42 is guided by the arc-shaped guide plate 43 and sprayed onto the stirring rod 12, washing away the material adhering to it. Simultaneously, the second rotating column 15 drives the second rotating shaft 45 to rotate via the second bevel gear 22 and the third bevel gear 11. The second rotating shaft 45 drives the second rotating plate 46 to rotate, and the second rotating plate 46 drives the lifting block 48 to reciprocate vertically via the fixed column 50. 8 drives the connecting plate 51 and the fixed rod 52 to reciprocate in the vertical direction. When the fixed rod 52 moves upward, it will contact the inclined surface of the folded plate 54. The fixed rod 52 presses the folded plate 54, and the spring 57 is stretched, allowing the fixed rod 52 to move upward smoothly. When the fixed rod 52 moves downward, it can press one end of the folded plate 54, and the spring 57 is compressed. When the fixed rod 52 is not in contact with the folded plate 54, the folded plate 54 will suddenly move back under the action of the spring 57, and the impact ball 56 will impact the stirring shaft 9. The impact generates vibration, which can accelerate the material falling off the stirring rod 12.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A method for foaming environmentally friendly polyurethane foam, characterized in that: Includes the following steps: S1: Take appropriate amounts of catalyst, foam stabilizer, foaming agent, cell opener and flame retardant as required, add them to the mixing and stirring device, and mix the materials thoroughly and evenly through the mixing and stirring device at a certain speed to obtain mixture X. Cool mixture X to 15℃ and set aside. S2: Add an appropriate amount of isocyanate to the mixing and stirring device as required, so that mixture X and isocyanate are fully mixed and homogeneous to obtain mixture Y; S3: Use a high-pressure foaming machine to mix the mixture Y obtained in S2 with the polymeric isocyanate to prepare polyurethane foam; The mixing and stirring device in S1 is specifically as follows: The mixing and stirring device includes a barrel (1), four support columns (2) are fixedly connected to the bottom of the barrel (1), a feed pipe (3) is connected to the top of the barrel (1), a discharge pipe (4) is connected to the bottom of the barrel (1), valves are installed on the feed pipe (3) and the discharge pipe (4), a first support frame (5) is fixedly connected to the top of the barrel (1), a first motor (6) is fixedly connected to the first support frame (5), a first rotating column (7) is fixedly connected to the output shaft of the first motor (6), the bottom end of the first rotating column (7) is rotatably connected to the top of the barrel (1) through a bearing, a first gear (8) is fixedly connected to the surface of the first rotating column (7), a stirring shaft (9) is rotatably connected to the barrel (1) through a bearing, a second gear (10) is fixedly connected to the surface of the stirring shaft (9), the second gear (10) meshes with the first gear (8), and multiple stirring rods (12) are fixedly connected to the surface of the stirring shaft (9). A second support frame (13) is fixedly connected to the top of the barrel (1), a second motor (14) is fixedly connected to the second support frame (13), a second rotating column (15) is fixedly connected to the output shaft of the second motor (14), the second rotating column (15) is rotatably connected to the barrel (1) through a bearing, a third gear (16) is fixedly connected to the bottom end of the second rotating column (15), and a ring gear (17) is rotatably connected to the inner wall of the barrel (1), and two scrapers (18) are fixedly connected to the ring gear (17), the scrapers (18) are in contact with the inner wall of the barrel (1); A first fixing plate (19) is fixedly connected to the top of the barrel (1). A first rotating shaft (20) is rotatably connected to the first fixing plate (19) via a bearing. A first bevel gear (21) is fixedly connected to one end of the first rotating shaft (20). A second bevel gear (22) is fixedly connected to the surface of the second rotating column (15). The second bevel gear (22) meshes with the first bevel gear (21). A first rotating plate (23) is fixedly connected to the other end of the first rotating shaft (20). A connecting rod (24) is rotatably connected to the first rotating plate (23) via a pin. The top of the connecting rod (24) A horizontal plate (25) is rotatably connected by a pin. A piston cylinder (26) is provided above the barrel body (1). A piston rod (27) is slidably inserted on the piston cylinder (26). The top end of the piston rod (27) is fixedly connected to the horizontal plate (25). A piston block (28) is fixedly connected to the bottom end of the piston rod (27). An air inlet pipe (29) is connected and fixedly connected to the piston cylinder (26). An air inlet check valve (30) is installed on the air inlet pipe (29). An air outlet pipe (31) is connected and fixedly connected to the piston cylinder (26). An air outlet check valve (32) is installed on the air outlet pipe (31). Four support rods (33) are fixed to the top of the barrel (1), and a water tank (34) is fixed to the top of the four support rods (33). The piston cylinder (26) is fixed to the water tank (34) through the mounting plate. The air outlet pipe (31) is connected to the water tank (34). A water inlet pipe (35) is connected to the water tank (34). A water outlet pipe (36) is connected to the water tank (34). A connecting block (37) is fixed to one end of the water outlet pipe (36). The bottom of the connecting block (37) is rotatably connected to the top of the stirring shaft (9) through a bearing. A water inlet channel (38) is opened inside the stirring shaft (9). A horizontal pipe (39) is fixed to the top of the stirring rod (12). One end of the horizontal pipe (39) is connected to the water inlet channel (38). Multiple water outlet holes (40) are opened on the horizontal pipe (39).

2. The method for foaming environmentally friendly polyurethane foam according to claim 1, characterized in that: The horizontal tube (39) is fixed with a plurality of arc-shaped tubes (42) that communicate with the water outlet (40). Four blocking membranes (41) are fixed to the inner wall of one end of the horizontal tube (39) and the arc-shaped tubes (42). The blocking membranes (41) are elastic and used to block water. An arc-shaped guide plate (43) is fixed to the horizontal tube (39).

3. The method for foaming environmentally friendly polyurethane foam according to claim 2, characterized in that: A second fixed plate (44) is fixedly connected to the top of the barrel (1). A second rotating shaft (45) is rotatably connected to the second fixed plate (44) via a bearing. A third bevel gear (11) is fixedly connected to one end of the second rotating shaft (45), and the third bevel gear (11) meshes with the second bevel gear (22). A second rotating plate (46) is fixedly connected to the other end of the second rotating shaft (45). Two guide rods (47) are fixedly connected to the top of the barrel (1). A lifting block (48) is slidably connected to the two guide rods (47). A limit port (49) is opened on the lifting block (48). A fixed column (50) is fixedly connected to the second rotating plate (46). The fixed column (50) slides... The lifting block (48) is connected to the limit port (49). Two connecting plates (51) are fixedly connected to the lifting block (48). A fixing rod (52) is fixedly connected to one end of the connecting plate (51). Two L-shaped plates (53) are fixedly connected to the top of the barrel (1). A folded plate (54) is rotatably connected to the L-shaped plate (53) through a vertical plate and a pin. A slope is provided at the bottom of one end of the folded plate (54). The fixing rod (52) is located below one end of the folded plate (54). A connecting column (55) is fixedly connected to the folded plate (54). An impact ball (56) is fixedly connected to one end of the connecting column (55). A spring (57) is fixedly connected between the top of the L-shaped plate (53) and the folded plate (54).

4. The method for foaming environmentally friendly polyurethane foam according to claim 3, characterized in that: The inner wall of the barrel (1) is provided with an annular groove (58), and four sliders (59) are fixedly connected to the annular gear (17). The sliders (59) are slidably connected in the annular groove (58).

5. The method for foaming environmentally friendly polyurethane foam according to claim 4, characterized in that: The piston cylinder (26) has a first circular hole (60) at its top, and the piston rod (27) slides through the first circular hole (60).

6. The method for foaming environmentally friendly polyurethane foam according to claim 5, characterized in that: The lifting block (48) has two second circular holes (61), and the guide rod (47) passes through the second circular holes (61).

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