Preparation process of weather-resistant PE modified material

Abstract

The application relates to the technical field of PE material production, and discloses a preparation process of weather-resistant PE modified material, which is applied to a preparation device of the weather-resistant PE modified material, the preparation device comprises a tank body, a support is fixedly installed at the top of the tank body, a motor is fixedly installed in the middle of the top wall of the support, an output shaft of the motor is fixedly installed with a cylinder, a stirring rod is fixedly connected to the bottom of the cylinder. The PE modified material obtained as a surface layer material can reduce the water absorption rate of the profile, achieves the purpose of improving aging and resisting pollution, is not easy to fade, is not easy to wear, and can realize accelerated exchange and circulation of the tank body and external air in the preparation process, carries away the heat in the tank body, and when the heat emission is accelerated in the preparation process, the material can be prevented from flowing to the outside through the air outlet and being wasted.

Description

Technical Field

[0001] This invention belongs to the field of PE material production technology, and specifically relates to a preparation process for a weather-resistant modified PE material. Background Technology

[0002] Polyethylene (PE) is a thermoplastic resin obtained by polymerizing ethylene. Industrially, it also includes copolymers of ethylene with small amounts of α-olefins. Polyethylene is odorless, non-toxic, and has a waxy feel. It possesses excellent low-temperature resistance (minimum operating temperature can reach -100 to -70℃), good chemical stability, and is resistant to most acids and alkalis (except oxidizing acids). It is insoluble in common solvents at room temperature, has low water absorption, and excellent electrical insulation. However, existing PE materials, when applied to profile surfaces, do not effectively improve the water absorption rate of the profiles, do not address the aging problem, and offer little help in preventing contamination. Therefore, it is necessary to invent a preparation process for weather-resistant modified PE materials to solve these problems. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a preparation process for weather-resistant modified PE materials, thereby resolving the issues raised in the background section.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A preparation process for weather-resistant modified PE material is applied to a preparation device for weather-resistant modified PE material. The preparation device includes a tank, a support fixedly installed on the top of the tank, a motor fixedly installed in the middle of the top wall of the support, a cylinder fixedly installed on the output shaft of the motor, a stirring rod fixedly connected to the bottom of the cylinder, an opening on the top of the tank, a pressure plate installed in the opening, the pressure plate being sleeved on the outside of the cylinder, a sealing ring provided on both the inner and outer rings of the pressure plate, the sealing rings abutting against the cylinder and the inner wall of the tank, air outlets equidistantly arranged around the cylinder, an air inlet pipe communicating with the inside of the tank being fixedly installed equidistantly around the outside of the tank, a one-way valve provided inside the air inlet pipe and the air outlet, and a drive assembly for driving the up-and-down reciprocating motion of the pressure plate on the outside.

[0006] The preparation process of the weather-resistant modified PE material includes the following steps:

[0007] S1. Weigh the following raw materials according to the component ratio: HDPE 1-98%, propylene glycol butyl ether 1-8%, wear-resistant agent 1-60%, matting agent 0.1-15%, lubricant 0-10%, antistatic agent 1-15%, hexamethylenetetramine 1-14%, heat stabilizer 0.01-9%, UV stabilizer 0.01-9%; the UV stabilizer is a mixture of sodium acetate, chlorinated polyethylene and methylparaben; the wear-resistant agent is a mixture of various components including hydroxyl silicone oil, nano zinc oxide, titanium nitride powder and graphene oxide.

[0008] S2. The HDPE, abrasion resistant agent, and heat stabilizer are mixed according to the formula ratio and added to the reaction vessel. After stirring thoroughly at 100-110℃, propylene glycol butyl ether is added, and the reaction is continued for 2-2.5 hours. After the reaction is completed, the mixture is dried to obtain material mixture A. The matting agent, antistatic agent, hexamethylenetetramine, and UV stabilizer are mixed according to the formula ratio and stirred at 60-70℃ for 1-1.5 hours. After drying and cooling, material mixture B is obtained.

[0009] S3. Place the mixture A and mixture B obtained in step S2 into the tank (1) and stir at high speed. Set the drying temperature of the mixer to 150℃~180℃ and the mixing time to 2-3 hours. After naturally cooling to 40℃, discharge the material. During the cooling process, drive the pressure plate (6) to reciprocate through the drive component, thereby accelerating the exchange of air between the tank (1) and the outside world, so that the temperature can be cooled down faster.

[0010] S4. The raw materials obtained in step S3 are added to a granulator for heating, kneading and bonding. The length-to-diameter ratio of the granulator is 33:52, the granulation temperature is 180-250℃, and the screw speed is 300-500r / min. PE modified material is obtained by water cutting pellets.

[0011] Furthermore, the percentage content of each component of the wear-resistant agent is as follows: 10-30% hydroxyl silicone oil, 5-15% nano zinc oxide, 11-29% titanium nitride powder, and 6-24% graphene oxide; the percentage content of each component of the UV stabilizer is as follows: a mixture of 20-45% sodium acetate, 15-35% chlorinated polyethylene, and 20-28% methylparaben.

[0012] Furthermore, the preparation process of the wear-resistant agent is as follows: hydroxyl silicone oil, titanium nitride powder and graphene oxide are added to a mixer in proportion, heated to 100-140℃ and stirred evenly, then nano zinc oxide and hydrazine hydrate solution are added, refluxed for 3-4.5 hours, and the wear-resistant agent is obtained by distillation, washing and drying.

[0013] Furthermore, the drive assembly includes pressure rods symmetrically fixedly mounted on the pressure plate. The pressure rods have a T-shaped cross-section and are slidably inserted into the bracket. A first spring is sleeved on the outside of the pressure rods and above the bracket. A horizontal plate is fixedly mounted on the output shaft of the motor. A rotating shaft is rotatably mounted on the horizontal plate. A round rod is fixedly mounted on the outside of the rotating shaft. A torsion spring is sleeved on the rotating shaft. The two ends of the torsion spring are fixedly connected to the rotating shaft and the horizontal plate, respectively. A stop bar is fixedly mounted on the bottom of the horizontal plate. The stop bar fits against the round rod. Pressure blocks are fixedly mounted equidistantly around the top of the pressure plate. One side of the pressure block has an arc surface.

[0014] Furthermore, a sleeve block is fixedly fitted on the outside of the stirring rod, and an annular groove is opened on the outer side of the sleeve block. An annular frame is slidably installed in the annular groove, and a filter screen is fixedly installed inside the annular frame. The annular frame and the cylinder are fixedly connected by a pair of telescopic tubes. The air outlet is located between the pair of telescopic tubes. The annular frame and the top wall of the annular groove are fixedly connected by multiple second springs. A lifting rod is fixedly installed on the outside of the annular frame, and a lifting assembly for driving the lifting rod to rise is provided on the inner wall of the tank.

[0015] Furthermore, the lifting assembly includes a top block, a first inclined surface on the side of the top block near the lifting rod, a second inclined surface on the side of the top block away from the first inclined surface, a rectangular rod fixedly installed on one side of the top block, a mounting bracket sleeved on the outside of the rectangular rod, the mounting bracket being fixedly connected to the rectangular rod by a third spring, one end of the mounting bracket being fixedly installed on the inner wall of the tank, the number of top blocks corresponding to the pressure blocks, and the top blocks being located between adjacent pressure blocks.

[0016] Furthermore, the inner wall of the tank is provided with a cavity, and the cavity is provided with an electric heating mesh.

[0017] Furthermore, the upper outer side of the tank is provided with a feed inlet, the feed inlet is internally threaded with a cover plate, the outer side of the tank is provided with a temperature monitor, the bottom of the tank is provided with a discharge pipe, and the discharge pipe is provided with a solenoid valve.

[0018] The technical effects and advantages of this invention are as follows:

[0019] 1. The modified PE material obtained by this invention, when used as a surface material, can reduce the water absorption rate of the profile, thereby improving aging resistance and pollution resistance, and is also wear-resistant and not prone to fading.

[0020] 2. During the preparation process, the present invention can realize the accelerated exchange and circulation between the tank and the outside air, remove the heat inside the tank, accelerate cooling, and during the accelerated air flow, the stirring rod stirs the material to better dissipate the heat inside the material, thereby improving the heat dissipation effect of the material.

[0021] 3. During the preparation process, this invention accelerates heat dissipation while preventing materials from moving to the outside through the air outlet and causing waste. Attached Figure Description

[0022] Figure 1 A schematic diagram of the tank body according to an embodiment of the present invention is shown;

[0023] Figure 2 A schematic diagram of a portion of the structure of an embodiment of the present invention is shown. Figure 1 ;

[0024] Figure 3 An embodiment of the present invention is shown. Figure 2 Enlarged structural diagram at point A in the middle;

[0025] Figure 4 A cross-sectional view of the tank body according to an embodiment of the present invention is shown;

[0026] Figure 5 An embodiment of the present invention is shown. Figure 4 Enlarged structural diagram at point B;

[0027] Figure 6 A schematic diagram of a portion of the structure of an embodiment of the present invention is shown. Figure 2 ;

[0028] Figure 7 An embodiment of the present invention is shown. Figure 6 Enlarged structural diagram at point C;

[0029] Figure 8 A schematic diagram of a portion of the structure of an embodiment of the present invention is shown. Figure 3 ;

[0030] Figure 9 An embodiment of the present invention is shown. Figure 8 Enlarged structural diagram at point D;

[0031] In the diagram: 1. Tank body; 2. Support; 3. Motor; 4. Cylinder; 5. Stirring rod; 6. Pressure plate; 7. Air outlet; 8. Air inlet pipe; 9. One-way valve; 10. Pressure rod; 11. First spring; 12. Horizontal plate; 13. Round rod; 14. Torsion spring; 15. Stop bar; 16. Pressure block; 17. Sleeve block; 18. Ring frame; 19. Filter screen; 20. Telescopic tube; 21. Second spring; 22. Lifting rod; 23. Top block; 24. First inclined plane; 25. Second inclined plane; 26. Rectangular rod; 27. Mounting bracket; 28. Third spring; 29. ​​Electric heating grid; 30. Temperature monitor. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0033] This invention provides a preparation process for weather-resistant modified PE materials, and an apparatus for preparing weather-resistant modified PE materials, such as... Figures 1 to 9 As shown, the preparation device includes a tank 1, a bracket 2 is fixedly installed on the top of the tank 1, a motor 3 is fixedly installed in the middle of the top wall of the bracket 2, a cylinder 4 is fixedly installed on the output shaft of the motor 3, a stirring rod 5 is fixedly connected to the bottom of the cylinder 4, an opening is opened on the top of the tank 1, a pressure plate 6 is provided in the opening, the pressure plate 6 is sleeved on the outside of the cylinder 4, both the inner and outer rings of the pressure plate 6 are provided with sealing rings, the sealing rings abut against the cylinder 4 and the inner wall of the tank 1, air outlets 7 are equidistantly arranged around the cylinder 4, an air inlet pipe 8 communicating with the inside is fixedly installed equidistantly around the outside of the tank 1, both the air inlet pipe 8 and the air outlet 7 are provided with one-way valves 9, and a drive assembly for driving the up-and-down reciprocating motion is provided on the outside of the pressure plate 6;

[0034] In use, the motor 3 is started, causing its output shaft to rotate forward, driving the cylinder 4 and stirring rod 5 to rotate, thus mixing the raw materials in the tank 1. After completion, the motor 3 is started again, causing its output shaft to rotate in reverse, cooperating with the drive assembly to drive the pressure plate 6 to move up and down reciprocally. When the pressure plate 6 descends, it forces the air in the tank 1 outward. At this time, the one-way valve 9 located in the air outlet 7 opens, and the one-way valve 9 located in the air inlet pipe 8 closes. The air in the tank 1, carrying heat, is discharged to the outside through the air outlet 7. When the pressure plate 6 rises, it draws air into the tank 1. The one-way valve 9 in the air outlet 7 is closed, and the one-way valve 9 in the air inlet pipe 8 is opened. Outside air enters the tank 1 through the air inlet pipe 8. With the up-and-down reciprocating motion of the pressure plate 6, the same principle applies, causing outside air to continuously enter the tank 1 and then be discharged through the air outlet 7. This accelerates the flow of internal air, allowing air to exchange with outside air, carrying away heat from the tank 1, and accelerating cooling. In addition, during the process of accelerating air flow, the stirring rod 5 stirs the material, allowing the heat inside the material to dissipate better and improving the heat dissipation effect of the material.

[0035] The preparation process of the weather-resistant modified PE material includes the following steps:

[0036] S1. Weigh the following raw materials according to the component ratio: HDPE 1-98%, propylene glycol butyl ether 1-8%, abrasion resistant agent 1-60%, matting agent 0.1-15%, lubricant 0-10%, antistatic agent 1-15%, hexamethylenetetramine 1-14%, heat stabilizer 0.01-9%, UV stabilizer 0.01-9%; the UV stabilizer is a mixture of sodium acetate, chlorinated polyethylene and methylparaben; the abrasion resistant agent is a mixture of various components including hydroxyl silicone oil, nano zinc oxide, titanium nitride powder and graphene oxide.

[0037] S2. HDPE, abrasion resistant agent, and heat stabilizer are mixed according to the formula ratio and added to the reactor. After stirring thoroughly at 100-110℃, propylene glycol butyl ether is added, and the reaction is continued for 2-2.5 hours. After the reaction is completed, the mixture is dried to obtain material mixture A. Matting agent, antistatic agent, hexamethylenetetramine, and UV stabilizer are mixed according to the formula ratio and stirred at 60-70℃ for 1-1.5 hours. After drying and cooling, material mixture B is obtained.

[0038] S3. Place the mixture A and mixture B obtained in step S2 into tank 1 and stir at high speed. Set the drying temperature of the mixer to 150℃~180℃ and the mixing time to 2-3 hours. After naturally cooling to 40℃, discharge the material. During the cooling process, drive the pressure plate 6 to reciprocate through the drive component, thereby accelerating the exchange of air between the tank 1 and the outside world, so that the temperature can be lowered faster.

[0039] S4. The raw materials obtained in step S3 are added to a granulator for heating, kneading and bonding. The length-to-diameter ratio of the granulator is 33:52, the granulation temperature is 180-250℃, and the screw speed is 300-500r / min. PE modified material is obtained by water cutting pellets.

[0040] The percentage content of each component in the wear-resistant agent is as follows: 10-30% hydroxyl silicone oil, 5-15% nano zinc oxide, 11-29% titanium nitride powder and 6-24% graphene oxide; the percentage content of each component in the UV stabilizer is as follows: a mixture of 20-45% sodium acetate, 15-35% chlorinated polyethylene and 20-28% methylparaben.

[0041] The added abrasion-resistant agents and stabilizers give the material wear resistance and corrosion resistance, while antistatic agents, lubricants, UV stabilizers, and matting agents enable the co-extruded profiles to have a good glossy appearance, antistatic properties, and improved feel and texture. Notably, the raw material composition does not contain fillers, wood flour, or wood fiber, thus improving the profile's water absorption rate and consequently reducing aging and staining resistance.

[0042] Using this process to obtain PE modified material as a surface material can reduce the water absorption rate of the profile, thereby improving aging resistance and pollution resistance, and also making it wear-resistant and less prone to fading.

[0043] The preparation process of the wear-resistant agent is as follows: hydroxyl silicone oil, titanium nitride powder and graphene oxide are added to a mixer in proportion, heated to 100-140℃ and stirred evenly, then nano zinc oxide and hydrazine hydrate solution are added, and the mixture is refluxed for 3-4.5 hours. The wear-resistant agent is obtained by distillation, washing and drying.

[0044] like Figures 1 to 3As shown, the drive assembly includes pressure rods 10 symmetrically fixedly mounted on pressure plate 6. The cross-sectional shape of pressure rod 10 is T-shaped. Pressure rod 10 is slidably inserted into bracket 2. A first spring 11 is sleeved on the outside of pressure rod 10 and above bracket 2. A horizontal plate 12 is fixedly mounted on the output shaft of motor 3. A rotating shaft is rotatably mounted on the horizontal plate 12. A round rod 13 is fixedly mounted on the outside of the rotating shaft. A torsion spring 14 is sleeved on the rotating shaft. The two ends of the torsion spring 14 are fixedly connected to the rotating shaft and the horizontal plate 12, respectively. A stop rod 15 is fixedly mounted on the bottom of the horizontal plate 12. The stop rod 15 fits against the round rod 13. Pressure blocks 16 are fixedly mounted equidistantly around the top of pressure plate 6. One side of the pressure block 16 has an arc surface.

[0045] When the output shaft of motor 3 rotates forward, it moves the horizontal plate 12, the rotating shaft, and the round rod 13 accordingly. After the round rod 13 comes into contact with the pressure block 16, the round rod 13 rotates with the rotating shaft, causing the torsion spring 14 to deform to generate a force, which makes the round rod 13 avoid the pressure block 16. When the round rod 13 leaves the pressure block 16, the torsion spring 14 returns to its original position with the rotating shaft and the round rod 13, thus ensuring the normal rotation of the output shaft of motor 3. When the output shaft of motor 3 rotates in reverse, the round rod 13 comes into contact with the arc surface of the pressure block 16. At this time, due to the presence of the stop bar 15, the round rod 13 cannot deflect. Subsequently, the movement of the round rod 13 causes the arc surface to press the pressure block 16, which in turn lowers the pressure plate 6 and the pressure rod 10, compressing the first spring 11 and causing it to deform and generate force. When the round rod 13 leaves the pressure block 16, the first spring 11 releases its force, causing the pressure rod 10, the pressure plate 6, and the pressure block 16 to rise and reset. As the round rod 13 continuously contacts and separates from the pressure block 16, the up-and-down reciprocating motion of the pressure plate 6 can be realized.

[0046] like Figures 4 to 8 As shown, a sleeve block 17 is fixedly fitted on the outside of the stirring rod 5. An annular groove is opened on the outside of the sleeve block 17. An annular frame 18 is slidably installed in the annular groove. A filter screen 19 is fixedly installed inside the annular frame 18. The annular frame 18 and the cylinder 4 are fixedly connected by a pair of telescopic tubes 20. The air outlet 7 is located between the pair of telescopic tubes 20. The annular frame 18 and the top wall of the annular groove are fixedly connected by multiple second springs 21. A lifting rod 22 is fixedly installed on the outside of the annular frame 18. A lifting assembly for driving the lifting rod 22 to rise is provided on the inner wall of the tank 1.

[0047] The output shaft of motor 3 reverses, causing cylinder 4, stirring rod 5, sleeve block 17, second spring 21, annular frame 18, and lifting rod 22 to rotate. When the cylinder 13 is not in contact with the pressure block 16, the lifting assembly drives the lifting rod 22, causing it to rise along with the annular frame 18 and filter screen 19, compressing the second spring 21 and generating force. Then, the lifting assembly releases its drive on the lifting rod 22, and the second spring 21 releases its force, causing the annular frame 18 and filter screen 19 to descend. The annular frame 18 impacts the bottom wall of the annular groove, generating vibration, which is transmitted to the filter screen 19. Subsequently, the cylinder 13 and pressure block... The arc surface of 16 contacts the pressure plate 6, causing it to descend and expel the air from the tank 1. At this time, the air in the tank 1 passes through the filter screen 19 to filter out the floating material and is discharged to the outside. The material remains on the filter screen 19. When the round rod 13 separates from the pressure plate 16, the pressure plate 6 rises and resets, and air is replenished into the tank 1. At this time, the lifting component drives the lifting rod 22 again, which can vibrate the filter screen 19 in the same way, so that the material on the filter screen 19 can be shaken off. The subsequent process is the same as above. Throughout the process, the material can be prevented from moving to the outside through the air outlet 7 with the air flow, thus avoiding waste.

[0048] like Figures 4 to 8 As shown, the lifting assembly includes a top block 23. The top block 23 has a first inclined surface 24 on the side near the lifting rod 22 and a second inclined surface 25 on the side away from the first inclined surface 24. A rectangular rod 26 is fixedly installed on one side of the top block 23. A mounting bracket 27 is sleeved on the outside of the rectangular rod 26. The mounting bracket 27 is fixedly connected to the rectangular rod 26 by a third spring 28. One end of the mounting bracket 27 is fixedly installed on the inner wall of the tank body 1. The number of top blocks 23 corresponds to the number of pressure blocks 16. The top blocks 23 are located between adjacent pressure blocks 16. The second inclined surface 25 is set towards the annular frame 18.

[0049] When the output shaft of motor 3 reverses, the lifting rod 22 moves to contact the first inclined surface 24 of the top block 23. As the lifting rod 22 moves, it rises along the first inclined surface 24, thereby bringing the annular frame 18 and the filter screen 19 up and compressing the second spring 21 to deform and generate force. When the lifting rod 22 leaves the top block 23, the second spring 21 releases its force and brings the annular frame 18 and the filter screen 19 down. The annular frame 18 hits the bottom wall of the annular groove and generates vibration, which is transmitted to the filter screen 19. Subsequently, as the lifting rod 22 continues to move, the filter screen 19 can be continuously vibrated. When the output shaft of motor 3 rotates forward, the lifting rod 22 moves accordingly and contacts the second inclined surface 25, which, together with the second inclined surface 25, squeezes the rectangular rod 26 to contract and compress the third spring 28 to deform and generate force, so that the top block 23 avoids the lifting rod 22 and ensures the rotation of the output shaft of motor 3. When the lifting rod 22 separates from the top block 23, the third spring 28 releases its force and returns the rectangular rod 26 and the top block 23 to their original positions.

[0050] like Figure 4As shown, the inner wall of the tank 1 is provided with a cavity, and the cavity is provided with an electric heating grid 29.

[0051] The tank 1 can be heated by activating the electric heating network 29.

[0052] like Figure 4 As shown, a feed inlet is provided on the upper outer side of the tank body 1, and a cover plate is threaded into the feed inlet. A temperature monitor 30 is provided on the outer side of the tank body 1, and a discharge pipe is provided at the bottom of the tank body 1, with a solenoid valve inside the discharge pipe.

[0053] Raw materials can be poured into tank 1 through the inlet. The cover plate is rotated to connect with the inlet. The temperature monitor 30 can monitor the temperature inside tank 1 to understand whether the heating temperature has reached the requirements. When discharging, the solenoid valve is opened and the internal material is discharged through the discharge pipe.

[0054] Working principle: When in use, starting motor 3 causes its output shaft to rotate clockwise, rotating cylinder 4 and stirring rod 5, thus mixing the raw materials in tank 1. The clockwise rotation of motor 3's output shaft also moves the horizontal plate 12, rotating shaft, and round rod 13. After the round rod 13 contacts the pressure block 16, the rotation of the rotating shaft causes the torsion spring 14 to deform, generating a force that allows the round rod 13 to avoid the pressure block 16. When the round rod 13 leaves the pressure block 16, the torsion spring 14, along with the rotating shaft and round rod 13, returns to its original position. After ensuring the normal rotation of the output shaft of motor 3, start motor 3 to reverse its output shaft. When the output shaft of motor 3 reverses, the round rod 13 comes into contact with the arc surface of the pressure block 16. At this time, due to the presence of the stop rod 15, the round rod 13 cannot deflect. Subsequently, the movement of the round rod 13 causes the arc surface to press the pressure block 16, causing it to descend along with the pressure plate 6 and the pressure rod 10, compressing the first spring 11 and causing it to deform and generate force. When the round rod 13 leaves the pressure block 16, the first spring 11 releases its force. As the pressure rod 10, pressure plate 6, and pressure block 16 rise and reset, the pressure plate 6 can move up and down repeatedly as the round rod 13 continuously contacts and separates from the pressure block 16. When the pressure plate 6 descends, it forces the air in the tank 1 outward. At this time, the one-way valve 9 in the air outlet 7 opens and the one-way valve 9 in the air inlet pipe 8 closes. The air in the tank 1, carrying heat, is discharged to the outside through the air outlet 7. When the pressure plate 6 rises, it draws air into the tank 1. At this time, the one-way valve 9 in the air outlet 7 closes and the one-way valve 9 in the air inlet pipe 8 opens. Outside air enters the tank 1 through the air inlet pipe 8. With the reciprocating motion of the pressure plate 6, the same principle applies, causing outside air to continuously enter the tank 1 and then be discharged through the air outlet 7. This accelerates the flow of internal air, allowing air to exchange with outside air, carrying away the heat in the tank 1, and accelerating cooling. During the process of accelerating air flow, the stirring rod 5 stirs the material, allowing the heat in the material to dissipate better and improving the heat dissipation effect of the material.The output shaft of motor 3 reverses, causing cylinder 4, stirring rod 5, sleeve block 17, second spring 21, ring frame 18, and lifting rod 22 to rotate. Before the round rod 13 contacts the pressure block 16, the lifting rod 22 moves to contact the first inclined surface 24 of the top block 23. As the lifting rod 22 moves, it rises along the first inclined surface 24, thereby causing the ring frame 18 and filter screen 19 to rise and compress the second spring 21, causing it to deform and generate force. When the lifting rod 22 leaves the top block 23, the second spring 21 releases its force, causing the ring frame 18 and filter screen 19 to descend. The ring frame 18 hits the bottom wall of the annular groove, generating vibration, which is transmitted to the filter screen 19. Subsequently, the round rod 13 contacts the arc surface of the pressure block 16, driving the pressure plate 6 to descend and expel the air in the tank 1. At this time, the air in the tank 1 passes through the filter screen 19 to filter out the floating material and is discharged to the outside. The material remains on the filter screen 19. When the round rod 13 separates from the pressure block 16, following the same principle, the pressure plate 6 rises and resets. Air is then added to the tank 1. The lifting rod 22 continues to contact and separate from the top block 23. As the lifting rod 22 continues to move, the filter screen 19 vibrates continuously, preventing clogging and dislodging the material into the lower material compartment. This process continues on the same principle, preventing material from being wasted by flowing air through the outlet 7. When the motor 3 output shaft rotates forward, the lifting rod 22 moves accordingly, contacting the second inclined surface 25. This causes the second inclined surface 25 to compress the rectangular rod 26, causing it to contract and compress the third spring 28, generating force that allows the top block 23 to avoid the lifting rod 22, ensuring the rotation of the motor 3 output shaft. When the lifting rod 22 separates from the top block 23, the third spring 28 releases its force, resetting the rectangular rod 26 and the top block 23.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A preparation process for a weather-resistant modified PE material, characterized in that: An apparatus for preparing weather-resistant modified PE materials is provided. The apparatus includes a tank (1), a bracket (2) is fixedly installed on the top of the tank (1), a motor (3) is fixedly installed in the middle of the top wall of the bracket (2), a cylinder (4) is fixedly installed on the output shaft of the motor (3), a stirring rod (5) is fixedly connected to the bottom of the cylinder (4), an opening is provided on the top of the tank (1), a pressure plate (6) is provided in the opening, the pressure plate (6) is sleeved on the outside of the cylinder (4), a sealing ring is provided on both the inner and outer rings of the pressure plate (6), the sealing ring abuts against the cylinder (4) and the inner wall of the tank (1), an air outlet (7) is provided equidistantly around the cylinder (4), an air inlet pipe (8) communicating with the inside of the tank (1) is fixedly installed equidistantly around the outside of the tank (1), a one-way valve (9) is provided inside the air inlet pipe (8) and the air outlet (7), and a drive assembly for driving the up-and-down reciprocating motion is provided on the outside of the pressure plate (6). The preparation process of the weather-resistant modified PE material includes the following steps: S1. Weigh the following raw materials according to the component ratio: HDPE 1-98%, propylene glycol butyl ether 1-8%, wear-resistant agent 1-60%, matting agent 0.1-15%, lubricant 0-10%, antistatic agent 1-15%, hexamethylenetetramine 1-14%, heat stabilizer 0.01-9%, UV stabilizer 0.01-9%; the UV stabilizer is a mixture of sodium acetate, chlorinated polyethylene and methylparaben; the wear-resistant agent is a mixture of various components including hydroxyl silicone oil, nano zinc oxide, titanium nitride powder and graphene oxide. S2. The HDPE, abrasion resistant agent, and heat stabilizer are mixed according to the formula ratio and added to the reaction vessel. After stirring thoroughly at 100-110℃, propylene glycol butyl ether is added, and the reaction is continued for 2-2.5 hours. After the reaction is completed, the mixture is dried to obtain material mixture A. The matting agent, antistatic agent, hexamethylenetetramine, and UV stabilizer are mixed according to the formula ratio and stirred at 60-70℃ for 1-1.5 hours. After drying and cooling, material mixture B is obtained. S3. Place the mixture A and mixture B obtained in step S2 into the tank (1) and stir at high speed. Set the drying temperature of the mixer to 150℃~180℃ and the mixing time to 2-3H. After naturally cooling to 40℃, discharge the material. During the cooling process, drive the pressure plate (6) through the drive component to reciprocate, thereby accelerating the exchange of air between the tank (1) and the outside world, so that the temperature can be cooled down faster. S4. Add the raw material obtained in step S3 to a granulator for heating, kneading and bonding. The length-to-diameter ratio of the granulator is 33:52, the granulation temperature is 180-250℃, and the screw speed is 300-500r / min. PE modified material is obtained by water cutting pellets. The drive assembly includes pressure rods (10) symmetrically fixedly installed on the pressure plate (6). The pressure rods (10) have a T-shaped cross section. The pressure rods (10) are slidably inserted into the bracket (2). A first spring (11) is sleeved on the outside of the pressure rods (10) and above the bracket (2). A horizontal plate (12) is fixedly installed on the output shaft of the motor (3). A rotating shaft is rotatably installed on the horizontal plate (12). A round rod (13) is fixedly installed on the outside of the rotating shaft. A torsion spring (14) is sleeved on the rotating shaft. The two ends of the torsion spring (14) are fixedly connected to the rotating shaft and the horizontal plate (12) respectively. A stop bar (15) is fixedly installed at the bottom of the horizontal plate (12). The stop bar (15) is in contact with the round rod (13). A pressure block (16) is fixedly installed around the top of the pressure plate (6) at equal intervals. One side of the pressure block (16) is provided with an arc surface. The stirring rod (5) is fixedly fitted with a sleeve block (17), and an annular groove is provided on the outer side of the sleeve block (17). An annular frame (18) is slidably installed in the annular groove. A filter screen (19) is fixedly installed inside the annular frame (18). The annular frame (18) and the cylinder (4) are fixedly connected by a pair of telescopic tubes (20). The air outlet (7) is located between the pair of telescopic tubes (20). The annular frame (18) and the top wall of the annular groove are fixedly connected by multiple second springs (21). A lifting rod (22) is fixedly installed on the outside of the annular frame (18). The inner wall of the tank (1) is provided with a lifting assembly for driving the lifting rod (22) to rise.

2. The preparation process of the weather-resistant modified PE material according to claim 1, characterized in that: The wear-resistant agent has the following percentage content: 10-30% hydroxyl silicone oil, 5-15% nano zinc oxide, 11-29% titanium nitride powder, and 6-24% graphene oxide; the UV stabilizer has the following percentage content: a mixture of 20-45% sodium acetate, 15-35% chlorinated polyethylene, and 20-28% methylparaben.

3. The preparation process of the weather-resistant modified PE material according to claim 2, characterized in that: The preparation process of the wear-resistant agent is as follows: hydroxyl silicone oil, titanium nitride powder and graphene oxide are added to a mixer in a certain proportion, heated to 100-140℃ and stirred evenly, then nano zinc oxide and hydrazine hydrate solution are added, and the mixture is refluxed for 3-4.5 hours. The wear-resistant agent is obtained by distillation, washing and drying.

4. The preparation process of the weather-resistant modified PE material according to claim 1, characterized in that: The lifting assembly includes a top block (23), a first inclined surface (24) on the side of the top block (23) near the lifting rod (22), a second inclined surface (25) on the side of the top block (23) away from the first inclined surface (24), a rectangular rod (26) fixedly installed on one side of the top block (23), a mounting bracket (27) sleeved on the outside of the rectangular rod (26), the mounting bracket (27) being fixedly connected to the rectangular rod (26) by a third spring (28), one end of the mounting bracket (27) being fixedly installed on the inner wall of the tank (1), the number of top blocks (23) corresponding to the pressure blocks (16), and the top blocks (23) being located between adjacent pressure blocks (16).

5. The preparation process of the weather-resistant modified PE material according to claim 1, characterized in that: The inner wall of the tank (1) is provided with a cavity, and the cavity is provided with an electric heating grid (29).

6. The preparation process of the weather-resistant modified PE material according to claim 1, characterized in that: The upper outer side of the tank (1) is provided with a feed inlet, and the feed inlet is threaded with a cover plate. The outer side of the tank (1) is provided with a temperature monitor (30), and the bottom of the tank (1) is provided with a discharge pipe, and the discharge pipe is provided with a solenoid valve.

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