A multi-material blending equipment for TPU material modification

Abstract

The invention discloses a multi-material blending device for TPU material modification, and specifically relates to the technical field of material blending and modification. The invention drives a movable shaft to rotate by a motor, so that a stirring frame can stir the raw materials. When the raw materials are stirred, the stirring frame can be kept in contact with the inner wall of a reactor to avoid raw material residue, which is beneficial to the cleaning of the reactor. Secondly, when the raw materials are stirred and mixed, the raw materials can be drained to the top for discharge through spiral blades, and the circulation can be carried out so that the upper and lower raw materials can be convected to achieve uniform mixing. The heaters are distributed in a spiral shape inside the reactor, so that the raw materials flowing from top to bottom can be evenly heated by the spiral heaters, and the raw materials are heated layer by layer by multiple heaters, so that the raw materials are heated more fully, and the raw materials flowing horizontally and flowing up and down can maintain heating uniformity. Moreover, through multi-directional heating, not only sufficient heating is achieved, but also the reaction efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of material blending and modification, and more particularly to a multi-material blending device for TPU material modification. Background Art

[0002] TPU stands for thermoplastic polyurethane elastomer. It is a special material that combines the high elasticity of rubber with the molding processability of thermoplastic plastics. It has the advantages of good mechanical strength, wear resistance, oil resistance, low temperature resistance, high elasticity, etc. At the same time, the raw materials are green and environmentally friendly, and the application field is broad. With the development of social needs, traditional single TPU materials can no longer meet the needs of production and life. Therefore, TPU needs to be modified to improve its shortcomings such as heat resistance, aging resistance, flame retardancy, and antistatic effect.

[0003] TPU can be blended and modified with other polymers to combine the performance advantages of each polymer component and make up for the performance defects and deficiencies of any single component. In addition, the cost of TPU is relatively high. By blending with other materials, the cost of raw materials can be reduced and economic benefits can be improved without affecting the overall performance.

[0004] At present, in the process of blending and modifying TPU, blending equipment is often needed to mix different materials. At present, although the blending equipment in the existing technology can achieve the mixing of raw materials, the short-term mixing effect is poor, and it is generally heated at the bottom, which makes the heating of different positions not uniform. At the same time, in the process of mixing the materials, air or dust can easily enter the blending equipment, making it easy for bubbles or impurities to appear in the mixed materials, affecting the quality of the finished product. Therefore, it is of great significance to study a new multi-material blending equipment for TPU material modification to solve the above problems. Summary of the Invention

[0005] In order to overcome the above-mentioned defects, the present invention provides a multi-material blending equipment for TPU material modification. The technical problem to be solved by the present invention is: the blending effect of the blending equipment in the prior art is poor in a short time, and the heating of different positions is not uniform enough. At the same time, in the process of mixing the materials, air or dust can easily enter the interior of the blending equipment, making it easy for bubbles or impurities to appear in the mixed materials, affecting the quality of the finished product.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-material blending device for TPU material modification, comprising a reactor, a conveying stirring component is built into the inner cavity of the reactor, the conveying stirring component runs through the reaction cover, the conveying stirring component is located inside the feeding barrel, and the outside of the feeding barrel is fixedly connected to a plurality of heaters around the circumference of the feeding barrel, and the plurality of heaters are arranged longitudinally on the outside of the feeding barrel, the feeding barrel is fixedly connected to the middle position below the reaction cover, and the plurality of heaters are in a spiral shape, and the plurality of heaters are located in the reactor. The inner cavity of the reactor, and the upper part of the reactor is connected and fixed to the reaction cover by a plurality of fixing bolts arranged in a circular ring, a feed hopper is installed above the reaction cover and on the left side of the conveying stirring assembly, the bottom of the feed hopper is communicated with the upper opening of the reactor, an automatic flip cover assembly for controlling the flipping of the feed cover is installed on the feed hopper, a vacuum generator is installed above the feed cover and on the left side of the start control assembly, the bottom end of the vacuum generator is communicated with the opening of the feed hopper, and the start control assembly is installed through the upper part of the feed cover;

[0007] The conveying stirring assembly includes a movable shaft, a spiral blade is fixedly connected to the outside of the movable shaft and along the length of the movable shaft, and the spiral blade and the movable shaft are both located in the inner cavity of the feeding barrel, the bottom end of the movable shaft is fixedly connected to a stirring frame, and the stirring frame fits in the inner cavity of the reactor, the automatic flip cover assembly includes an electric push rod, the telescopic end of the electric push rod is fixedly connected to the fixed block, the upper part of the fixed block is fixedly connected to the sliding rod, the top of the sliding rod is slidably connected to the groove, and the groove is arc-shaped and opened along the length of the roller body, the roller body is fixedly connected to the rotating structure, the rotating structure is fixedly connected to the feed cover, and the feed cover is fixedly connected to a second switch below one end face of the feed cover away from the rotating structure, the lower part of the second switch is fit between the connecting block, and the connecting block is fixedly connected to the feed hopper.

[0008] As a further solution of the present invention: the reactor is embedded in a fixed bracket, the fixed bracket includes an upper hollow plate, a lower bottom frame and four support members, and the upper hollow plate and the lower bottom frame bracket are fixedly connected by the four support members.

[0009] As a further solution of the present invention: a temperature monitor is installed through the top of the reaction cover, and the detection end of the temperature monitor is located at the upper opening position of the reactor, the bottom of the reactor is connected to the discharge valve, and the outside of the feed cylinder and the position near the bottom of the reaction cover are connected to multiple discharge pipes, and the multiple discharge pipes are arranged along the outer circumferential surface of the feed cylinder.

[0010] As a further solution of the present invention: the movable shaft is rotatably connected to a first bearing, and the first bearing is embedded and installed in the middle position of the reaction cover.

[0011] As a further solution of the present invention: the top end of the movable shaft passes through the first bearing and is fixedly connected to the output shaft of the motor, the two sides of the motor are fixedly connected to the two mounting plates, and the two mounting plates are fixedly installed at the top position of the reaction cover.

[0012] As a further solution of the present invention: the stirring frame includes four L-shaped rods connected to each other, and the longitudinal rods of the four L-shaped rods are slidably fitted with the inner cavity of the reactor, and the four L-shaped longitudinal rods are fixedly connected to a plurality of stirring rods on one side away from the inner wall of the reactor, and the stirring rods are arranged longitudinally up and down, and each transversely arranged stirring rod is staggered with multiple heaters.

[0013] As a further solution of the present invention: the electric push rod is installed on a fixed seat, the fixed seat is fixedly connected to the back of the feed hopper, the rotating structure includes a connecting shaft, the connecting shaft is fixedly connected to the feed cover, the connecting shaft is rotatably connected to the second bearing, and the second bearing is fixedly connected to the feed hopper through a support block.

[0014] As a further solution of the present invention: the electric push rod is installed on a fixed seat, the fixed seat is fixedly connected to the back of the feed hopper, the rotating structure includes a connecting shaft, the connecting shaft is fixedly connected to the feed cover, the connecting shaft is rotatably connected to the second bearing, and the second bearing is fixedly connected to the feed hopper through a support block.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention drives the movable shaft to rotate by a motor, so that the stirring frame can stir the raw materials, and the stirring frame can be kept in contact with the inner wall of the reactor when the raw materials are stirred, so as to avoid raw material residue and facilitate the cleaning of the reactor. Secondly, when the raw materials are stirred and mixed, the spiral blades can be used to guide the raw materials to the upper side for discharge, so that the upper and lower raw materials can be convected and evenly mixed. Moreover, the heaters are distributed in a spiral shape inside the reactor, so that the raw materials flowing from top to bottom can be evenly heated by the spiral heaters, and the raw materials are heated layer by layer by multiple heaters, so that the raw materials are heated more fully, so that the raw materials flowing horizontally and flowing up and down can maintain heating uniformity, and through multiple directions, not only sufficient heating is achieved, but also the reaction efficiency is improved.

[0017] 2. The present invention achieves a sealed connection by closing the feed cover and the feed hopper, and then extracts the air in the reactor through a vacuum generator to maintain the vacuum state of the reactor, thereby preventing air from entering and causing bubbles in the raw materials, and also preventing impurities from entering, thereby ensuring the quality of the raw material and finished product;

[0018] 3. When the present invention uses the vacuum generator to evacuate the air, the sealing plug overcomes the elastic force of the spring and moves downward under the action of air pressure, so that the sealing plug pushes the first switch downward to contact the bottom of the inner wall of the cylindrical tube. At this time, the motor can be operated, and it can be more intuitive to know that the reactor is in a vacuum state at this time, avoiding the problem of starting the motor when it is not in a vacuum state, which leads to a decrease in the quality of the raw materials when they are mixed. In addition, when the reactor leaks, the elastic force of the spring can drive the sealing plug to reset upward, so that the first switch is separated from the cylindrical tube, so that the motor operation can be controlled in time to reduce the problem of further deterioration of the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the three-dimensional cross-sectional structure of the reactor of the present invention;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the reaction cover of the present invention;

[0022] Figure 4 It is a three-dimensional structural diagram of the heater of the present invention;

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the spiral blade of the present invention;

[0024] Figure 6 It is a schematic diagram of the three-dimensional cross-sectional structure of the feed hopper of the present invention;

[0025] Figure 7 It is a three-dimensional structural diagram of the automatic flip cover assembly of the present invention;

[0026] In the figure: 1. Reactor; 2. Fixed bracket; 3. Reactor cover; 4. Temperature monitor; 5. Conveying stirring assembly; 51. Motor; 52. First bearing; 53. Movable shaft; 54. Spiral blade; 55. Stirring frame; 56. Stirring rod; 6. Automatic flip cover assembly; 61. Fixed seat; 62. Electric push rod; 63. Roller; 64. Fixed block; 65. Sliding rod; 66. Groove; 67. Connecting shaft; 68. Second bearing; 7. Discharge valve; 8. Start control assembly; 81. Cylinder; 82. First switch; 83. Sealing plug; 84. Spring; 85. Connecting port; 9. Conveying barrel; 10. Discharge pipe; 11. Heater; 12. Feed hopper; 13. Feed cover; 14. Second switch; 15. Connecting block; 16. Vacuum generator. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] like Figure 1-7 As shown, the present invention provides a multi-material blending device for TPU material modification, including a reactor 1, which is embedded in a fixed bracket 2. The fixed bracket 2 includes an upper hollow plate, a lower bottom frame and four support members. The upper hollow plate and the lower bottom frame bracket are fixedly connected by the four support members. The four support members can connect the lower bottom frame and the upper hollow plate, thereby enabling the erection of the upper hollow plate. At the same time, the assembly between the support members, the upper hollow plate and the lower bottom frame can ensure the stability of the reactor 1.

[0029] A conveyor-type stirring assembly 5 is built into the inner cavity of the reactor 1, and the conveyor-type stirring assembly 5 passes through the reaction cover 3. A temperature monitor 4 is installed above the reaction cover 3, and the detection end of the temperature monitor 4 is located at the upper opening of the reactor 1. The temperature monitor 4 can monitor the temperature in the reactor 1, which is convenient for real-time temperature acquisition and can be intuitively understood by the staff;

[0030] The bottom of the reactor 1 is connected to the discharge valve 7. A plurality of discharge pipes 10 are connected to the outside of the feed cylinder 9 and near the bottom of the reaction cover 3. The plurality of discharge pipes 10 are arranged along the outer circumference of the feed cylinder 9. The discharge valve 7 can be opened to discharge the reacted raw materials, which is convenient for the discharge of the raw materials. The circular arrangement of the discharge pipes 10 can ensure that the raw materials are evenly dispersed and discharged, which is beneficial to the uniform mixing of the raw materials.

[0031] The conveying stirring assembly 5 is located inside the feeding barrel 9, and a plurality of heaters 11 are fixedly connected to the outside of the feeding barrel 9 around the circumferential surface of the feeding barrel 9, and the plurality of heaters 11 are arranged longitudinally on the outside of the feeding barrel 9. The feeding barrel 9 is fixedly connected to the middle position below the reaction cover 3, and the plurality of heaters 11 are spiral in shape. The plurality of heaters 11 are all located in the inner cavity of the reactor 1. The heaters 11 can heat the raw materials, and the plurality of heaters 11 are arranged longitudinally so that the raw materials can be fully heated in multiple layers in a flowing manner from top to bottom. The spiral arrangement of the heaters 11 can increase the heating area and reduce the heating blind area, so that the raw materials can be fully and evenly heated.

[0032] The top of the reactor 1 is connected and fixed to the reaction cover 3 by a plurality of fixing bolts arranged in a circular shape. The fixing bolts are used to fix the reaction cover 3 and the reactor 1, thereby maintaining the tightness between the reaction cover 3 and the reactor 1, so that the reactor 1 can be kept sealed.

[0033] A feed hopper 12 is installed above the reaction cover 3 and on the left side of the conveyor stirring assembly 5. The bottom of the feed hopper 12 is connected to the upper opening of the reactor 1. The feed hopper 12 is designed to be wide at the top and narrow at the bottom, which facilitates the injection operation.

[0034] The feed hopper 12 is provided with an automatic flip cover assembly 6 for controlling the flipping of the feed cover 13. A vacuum generator 16 is installed above the feed cover 13 and on the left side of the start control assembly 8. The operation of the vacuum generator 16 can extract the air in the reactor 1 and maintain the vacuum of the reactor 1, thereby avoiding the problem of bubbles appearing during the mixing and stirring of the raw materials, thereby avoiding the deterioration of the raw materials. Secondly, when the reactor 1 is maintained in vacuum, the sealing plug 83 is affected by the air pressure to overcome the elastic force of the spring 84, so that the first switch 82 contacts the cylindrical barrel 81 downward, thereby smoothly connecting the circuit of the motor 51.

[0035] The bottom end of the vacuum generator 16 is connected to the opening of the feed hopper 12, and the start-up control component 8 is installed above the feed cover 13. The start-up control component 8 includes a cylindrical barrel 81, which is installed in the feed cover 13. Two communication ports 85 are provided at the bottom of the cylindrical barrel 81. The two communication ports 85 are connected to the opening above the feed hopper 12. A sealing plug 83 is slidably fitted in the inner cavity of the cylindrical barrel 81. A first switch 82 is fixedly installed below the sealing plug 83. A spring 84 is fixedly connected between the upper wall of the inner cavity of the cylindrical barrel 81 and the upper wall of the inner cavity of the cylindrical barrel 81. An opening communicating with the inner cavity of the cylindrical barrel 81 is provided above the cylindrical barrel 81. The first switch 82 can be turned on and off. The working state of the reactor 51 is controlled. Secondly, the design of the communication port 85 can be connected with the feed hopper 12, so that air circulation can be achieved, and the sealing plug 83 can maintain the sealing between the inner cavity of the cylindrical barrel 81, and the opening can ensure that the air above the sealing plug 83 can circulate with the outside air, so that the sealing plug 83 can move smoothly. When the reactor 1 leaks, the elastic force of the spring 84 can drive the sealing plug 83 to reset upward, so that the sealing plug 83 drives the first switch 82 upward away from the cylindrical barrel 81. At this time, the circuit of the motor 51 can be disconnected, avoiding the problem of bubbles generated by the continued rotation of the stirring rod 56. It can be achieved through automation, and the entire operation is simple and convenient.

[0036] The conveyor stirring assembly 5 includes a movable shaft 53, which is rotatably connected to a first bearing 52. The first bearing 52 is embedded in the middle of the reaction cover 3. The top of the movable shaft 53 passes through the first bearing 52 and is fixedly connected to the output shaft of the motor 51. The two sides of the motor 51 are fixedly connected to two mounting plates. The two mounting plates are fixedly mounted on the top of the reaction cover 3. The mounting plates can lock the position of the motor 51 to ensure the stability of the motor 51, while the first bearing 52 can ensure the stable rotation of the movable shaft 53.

[0037] A spiral blade 54 is fixedly connected to the outside of the movable shaft 53 and along the length of the movable shaft 53, and the spiral blade 54 and the movable shaft 53 are both located in the inner cavity of the feeding barrel 9. The spiral blade 54 can convey the raw materials, so that the raw materials can be convected from top to bottom, which can improve the reaction efficiency and facilitate the uniform heating of the raw materials. At the same time, the feeding barrel 9 can ensure that the raw materials are smoothly delivered to the upper part of the inner cavity of the reactor 1 and discharged;

[0038] The bottom end of the movable shaft 53 is fixedly connected to a stirring frame 55, which includes four mutually connected L-shaped rods, and the longitudinal rods of the four L-shaped rods are slidably fitted with the inner cavity of the reactor 1. The four L-shaped longitudinal rods are fixedly connected to a plurality of stirring rods 56 on one side away from the inner wall of the reactor 1, and the stirring rods 56 are arranged longitudinally up and down, and each transversely arranged stirring rod 56 is staggered with multiple heaters 11. The stirring frame 55 fits in the inner cavity of the reactor 1. The multiple groups of L-shaped bars can increase the stirring area, facilitate the turbulence of the raw materials, and cooperate with the use of the stirring rods 56 to achieve a better stirring effect on the raw materials. Secondly, the stirring rods 56 and the heaters 11 are staggered so that they do not affect each other.

[0039] The automatic flip cover assembly 6 includes an electric push rod 62, which is installed on a fixing base 61. The fixing base 61 is fixedly connected to the back of the feed hopper 12. The fixing base 61 can fix the electric push rod 62, so that the stability of the electric push rod 62 is improved.

[0040] The rotating structure includes a connecting shaft 67, which is fixedly connected to the feed cover 13. The connecting shaft 67 is rotatably connected to the second bearing 68, and the second bearing 68 is fixedly connected to the feed hopper 12 through a support block. The telescopic end of the electric push rod 62 is fixedly connected to the fixed block 64, and the upper part of the fixed block 64 is fixedly connected to the slide bar 65. The top of the slide bar 65 is slidably connected to the groove 66. The groove 66 is arc-shaped and opened along the length of the roller body 63. The roller body 63 is fixedly connected to the rotating structure, and the rotating structure is fixedly connected to the feed cover 13. The feed cover 13 is fixedly connected to the lower part of one end face away from the rotating structure. The second switch 14, the lower part of the second switch 14 is fitted with the connecting block 15, the connecting block 15 is fixedly connected to the feed hopper 12, and the electric push rod 62 retracts and can control the movement of the slide rod 65 through the connection of the fixed block 64. Since the groove 66 is a curved ring design, the slide rod 65 can rotate along the curved surface of the groove 66, which can drive the roller body 63 to rotate, and the roller body 63 can drive the connecting shaft 67 to rotate, and the feed cover 13 flips and fits tightly on the feed to achieve the purpose of sealing. Secondly, the flipping of the feed cover 13 can drive the second switch 14 to contact the connecting block 15, which can directly control the operation of the vacuum generator 16.

[0041] Working principle of the present invention:

[0042] When mixing, first add the raw materials into the reactor 1 through the feed hopper 12. After the raw materials are added, the electric push rod 62 is controlled to shorten, so that the electric push rod 62 drives the fixed block 64 to retract, so that the fixed block 64 drives the slide 65 to move, so that the slide 65 slides around the arc surface of the groove 66. At the same time, the slide 65 drives the roller body 63 to rotate, so that the roller body 63 drives the connecting shaft 67 to rotate, so that the connecting shaft 67 drives the feed cover 13 to rotate, so that the feed cover 13 is turned over and pressed tightly against the top of the feed hopper 12, so that the feed cover 13 3 and the connecting block 15, so that the second switch 14 controls the operation of the vacuum generator 16, so that the vacuum generator 16 extracts the air inside the reactor 1. As the air inside the reactor 1 decreases, the air pressure causes the sealing plug 83 to move downward against the elastic force of the spring 84, so that the sealing plug 83 drives the first switch 82 to move downward, so that the first switch 82 contacts the lower arm of the inner cavity of the cylindrical tube 81 downward, so that the first switch 82 can connect to the circuit of the motor 51, and at the same time, the reactor 1 remains in a vacuum state.

[0043] Then, the motor 51 is controlled to operate so that the motor 51 drives the movable shaft 53 to rotate, so that the movable shaft 53 drives the spiral blade 54 to rotate, so that the spiral blade 54 drives the stirring frame 55 to rotate, so that the stirring frame 55 rotates in contact with the inner cavity of the reactor 1, and the stirring frame 55 drives the stirring rod 56 to rotate to stir and mix the raw materials. At the same time, the heater 11 operates to heat the raw materials. When the spiral blade 54 rotates, the spiral blade 54 transports the raw materials upward, so that the raw materials enter the discharge pipe 10 through the feed cylinder 9, and are discharged into the upper part of the reactor 1 through the discharge pipe 10, so that the raw materials can pass through the upper and lower heaters 11 from top to bottom in sequence, so that the heater 11 can evenly heat the raw materials. Under the stirring action of the stirring rod 56 and the stirring frame 55, and the conveying action of the spiral blade 54, the raw materials can flow in multiple directions, so that the raw materials can be reacted more efficiently.

[0044] When a gas leak occurs in the reactor 1, gas enters the reactor 1. At this time, the elastic tension of the spring 84 can drive the sealing plug 83 to reset upward, so that the sealing plug 83 drives the first switch 82 to move upward, so that the first switch 82 is separated from the cylindrical tube 81. At this time, the first switch 82 disconnects the circuit of the motor 51, and the gas leakage condition can be checked in time.

[0045] Finally, a few points should be explained: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, which can be a mechanical connection or an electrical connection, or two

[0046] The internal connectivity of a component can be direct. "Up," "Down," "Left," and "Right" are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change.

[0047] Secondly: The drawings of the embodiments disclosed in the present invention only involve structures related to the embodiments disclosed in the present invention. Other structures may refer to conventional designs. The same embodiment and different embodiments of the present invention may be combined with each other without conflict.

[0048] Finally: The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A multi-material blending device for TPU material modification, comprising a reactor (1), characterized in that: The reactor (1) A conveying stirring assembly (5) is built into the inner cavity of the reactor (1), and the conveying stirring assembly (5) passes through the reaction cover (3). The conveying stirring assembly (5) is located inside the feeding cylinder (9), and the outside of the feeding cylinder (9) is fixedly connected with a plurality of heaters (11) around the circumferential surface of the feeding cylinder (9), and the plurality of heaters (11) are arranged longitudinally on the outside of the feeding cylinder (9). The feeding cylinder (9) is fixedly connected to the middle position below the reaction cover (3), and the shape of the plurality of heaters (11) is spiral. The plurality of heaters (11) are all located in the inner cavity of the reactor (1), and the upper part of the reactor (1) is fixed by a plurality of fixing bolts arranged in a circular ring. The reactor (1) is connected and fixed to the reaction cover (3); a feed hopper (12) is installed above the reaction cover (3) and on the left side of the conveying stirring assembly (5); the bottom of the feed hopper (12) is connected to the upper opening of the reactor (1); an automatic flip cover assembly (6) for controlling the flipping of the feed cover (13) is installed on the feed hopper (12); a vacuum generator (16) is installed above the feed cover (13) and on the left side of the start control assembly (8); the bottom end of the vacuum generator (16) is connected to the opening of the feed hopper (12); and the start control assembly (8) is installed above the feed cover (13); The conveying stirring assembly (5) includes a movable shaft (53), a spiral blade (54) is fixedly connected to the outside of the movable shaft (53) and along the length of the movable shaft (53), and the spiral blade (54) and the movable shaft (53) are both located in the inner cavity of the feeding barrel (9), and the bottom end of the movable shaft (53) is fixedly connected to a stirring frame (55), and the stirring frame (55) fits in the inner cavity of the reactor (1). The automatic flip cover assembly (6) includes an electric push rod (62), and the telescopic end of the electric push rod (62) is fixedly connected to the fixed block (64). The fixed block (64) is fixedly connected to the movable shaft (53). The top of the fixed block (64) is fixedly connected to the slide bar (65), the top of the slide bar (65) is slidably connected to the groove (66), the groove (66) is arc-shaped and opened along the length of the roller body (63), the roller body (63) is fixedly connected to the rotating structure, the rotating structure is fixedly connected to the feed cover (13), and the feed cover (13) is fixedly connected to the bottom of one end face away from the rotating structure with a second switch (14), the bottom of the second switch (14) is in contact with the connecting block (15), and the connecting block (15) is fixedly connected to the feed hopper (12); The electric push rod (62) is installed on the fixed seat (61) through the fixed seat (61), and the fixed seat (61) is fixedly connected to the back of the feed hopper (12). The rotating structure includes a connecting shaft (67), and the connecting shaft (67) is fixedly connected to the feed cover (13). The connecting shaft (67) is rotatably connected to the second bearing (68), and the second bearing (68) is fixedly connected to the feed hopper (12) through a support block. The start control assembly (8) includes a cylindrical barrel (81), which is installed in the feed cover (13) through the cylindrical barrel (81), and two communication ports (85) are opened at the bottom of the cylindrical barrel (81), and the two communication ports (85) are connected to the opening above the feed hopper (12). A sealing plug (83) is slidably fitted in the inner cavity of the cylindrical barrel (81), and a first switch (82) is fixedly installed below the sealing plug (83). A spring (84) is fixedly connected between the upper part of the sealing plug (83) and the upper wall of the inner cavity of the cylindrical barrel (81). An opening is opened above the cylindrical barrel (81) and is connected to the inner cavity of the cylindrical barrel (81); and, The feed cover (13) is turned over and pressed tightly against the top of the feed hopper (12), so that the second switch (14) on the feed cover (13) is squeezed with the connecting block (15), so that the second switch (14) controls the operation of the vacuum generator (16); the operation of the vacuum generator (16) extracts the air inside the reactor (1), so that the sealing plug (83) overcomes the elastic force of the spring (84) and moves downward, so that the sealing plug (83) drives the first switch (82) to move downward, so that the first switch (82) contacts the lower arm of the inner cavity of the cylindrical barrel (81) downward, so that the first switch (82) can be connected to the motor (51) circuit of the movable shaft (53).

2. The multi-material blending equipment for TPU material modification according to claim 1, characterized in that: The reactor (1) is embedded and installed in a fixed bracket (2). The fixed bracket (2) comprises an upper hollow plate, a lower bottom frame and four supporting members. The upper hollow plate and the lower bottom frame bracket are fixedly connected via the four supporting members.

3. The multi-material blending equipment for TPU material modification according to claim 1, characterized in that: A temperature monitor (4) is installed through the top of the reaction cover (3), and the detection end of the temperature monitor (4) is located at the upper opening position of the reactor (1). The bottom of the reactor (1) is connected to the discharge valve (7). The outside of the feeding cylinder (9) and the position close to the bottom of the reaction cover (3) are connected to multiple discharge pipes (10), and the multiple discharge pipes (10) are arranged along the outer peripheral surface of the feeding cylinder (9).

4. The multi-material blending equipment for TPU material modification according to claim 1, characterized in that: The movable shaft (53) is rotatably connected to the first bearing (52), and the first bearing (52) is embedded and installed in the middle position of the reaction cover (3).

5. The multi-material blending equipment for TPU material modification according to claim 4, characterized in that: The top end of the movable shaft (53) passes through the first bearing (52) and is fixedly connected to the output shaft of the motor (51). Both sides of the motor (51) are fixedly connected to two mounting plates, and the two mounting plates are fixedly installed at the top position of the reaction cover (3).

6. The multi-material blending equipment for TPU material modification according to claim 1, characterized in that: The stirring frame (55) includes four mutually connected L-shaped rods, and the longitudinal rods of the four L-shaped rods are slidably fitted with the inner cavity of the reactor (1). The longitudinal rods of the four L-shaped rods away from the inner wall of the reactor (1) are fixedly connected to a plurality of stirring rods (56), and the stirring rods (56) are arranged longitudinally up and down, and each transversely arranged stirring rod (56) is staggered with the plurality of heaters (11).

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