CN115847883A - Method and device for preparing high-toughness PP-R plastic pipeline by using vibration-temperature composite field annealing - Google Patents

Abstract

The invention discloses a method and device for preparing high-toughness PP-R plastic pipes by using vibration-temperature composite field annealing. The method includes 1) weighing raw materials according to the formula, mixing them evenly, and sending them to a single-screw extruder for extrusion molding , to obtain the original PP‑R pipe; 2) Put the original PP‑R pipe in a closed box with a vibration‑temperature compound field, the box is equipped with a vibration field source, and the temperature in the box is controllable and adjustable. The residence time in the vibration-temperature compound field airtight box is 5 to 30 minutes; 3) After the vibration-temperature compound field treatment, the PP-R pipe is cooled to obtain a PP-R pipe resistant to low temperature brittleness. The invention also discloses the structure of the vibration temperature composite field device. By adopting vibration and temperature composite field to process PP-R pipe, the speed is fast, the vibration field and temperature field are controllable, clean and hygienic; the residual internal stress of the pipe is fully eliminated, and the low-temperature brittleness of plastic products is effectively solved. Unaffected, saving costs.

Description

A method of preparing high-toughness PP-R plastic pipes using vibration-temperature composite field annealing Method and device

technical field

The invention belongs to the field of polymer composite material processing, and in particular relates to a method and a device for preparing high-toughness PP-R plastic pipes by using vibration-temperature composite field annealing.

Background technique

Random copolymer polypropylene (PP-R) has good heat resistance, pressure resistance and high temperature creep properties. Compared with other plastics, it also has great advantages in terms of environmental protection and the complexity of processing technology. Therefore, it has been widely used in the industrial field in recent years, especially in the application of indoor and outdoor cold and hot water pipes. However, PP-R pipes have the problem of low-temperature brittleness, that is, they are prone to brittle fracture when impacted at low temperatures. During the extrusion and shaping process of PP-R raw materials, due to the high pressure and high shear force, the molecular chains undergo drastic changes, and the molecules are frozen before the molecules are completely restored to the disordered and relaxed natural state, resulting in residual orientation stress. , which is the main reason for the low temperature brittleness of PP-R pipes.

At present, methods such as blending/filling modification and annealing are mostly used to improve its low-temperature brittleness. The blending/filling modification of PP-R raw materials can improve the impact resistance, but other properties will be affected and decreased, so it is difficult to guarantee the long-term performance. Proper annealing treatment can solve the residual stress in the matrix during polymer processing, thereby improving the comprehensive mechanical properties of the material.

Heat treatment is a commonly used annealing method. CN105252793 A provides a random copolymerization polypropylene (PP-R) pipe annealing process. By putting the formed PP-R pipe into a drying car, multi-channel heating and cooling are performed. To achieve the purpose of eliminating internal stress. The vibration treatment method is usually used for metal workpieces, by applying a specific cyclic load to the metal workpiece for a certain period of time at a given frequency, so as to achieve the process of residual stress homogenization. The feature of this process is that it can homogenize some residual stress of the workpiece, and has the characteristics of short processing cycle, energy saving and environmental protection, and high processing efficiency.

However, unlike metal workpieces, PP-R pipes have high flexibility. The traditional vibration treatment method has a small instantaneous action surface of the product, and has a good stress relief effect on metal workpieces with relatively high rigidity and easy to transmit vibration, but basically has no effect on plastic products with high elasticity and difficult to transmit vibration. Therefore, it is necessary to achieve stress relief for plastic products by increasing the area of action of vibration on the product. In addition, although single heat treatment and vibration treatment can be used to remove the residual stress of the product, the effect of single heat treatment or vibration treatment is still not good. Furthermore, in the case of single heat treatment, when it is necessary to obtain a suitable effect, the required heat treatment time is longer and the energy consumption is larger.

Contents of the invention

The conventional PP-R annealing process in the prior art is cumbersome, and the annealing time is long, the efficiency is low, and the cost is high. The invention provides a method and device for preparing high-toughness PP-R plastic pipes by using vibration-temperature compound field annealing. The method is simple and easy to operate, and the vibration field can be uniformly applied to the PP-R pipes. Under the action of the vibration field, dynamic stress is generated on the surface and inside of the product. When the superposition of dynamic stress and internal residual stress is greater than the yield limit of the material, the lattice slips, and the material produces a small plastic deformation, so as to eliminate and homogenize the residual stress. The role of heat treatment, supplemented by heat treatment, can effectively and quickly solve the problem of low temperature brittleness of PP-R pipes without affecting other properties of the product.

In order to achieve the above object, the technical scheme that the present invention takes is:

A method for preparing high-toughness PP-R plastic pipes using vibration-temperature compound field annealing, comprising the steps of:

1) Weigh the raw materials according to the formula, mix them evenly and send them to the single-screw extruder for extrusion molding to obtain the original PP-R pipe;

2) Put the original PP-R pipe in the vibration-temperature compound field airtight box. The vibration field source is set in the box. The temperature inside the box is controllable and adjustable. The original PP-R pipe is placed in the vibration-temperature compound field airtight box The residence time in is 5～30min;

3) Cool the PP-R pipe after the vibration-temperature compound field treatment to obtain a PP-R pipe resistant to low temperature brittleness.

Further, when the single-screw extruder extrudes the PP-R pipe in step 1), the barrel temperature of the extruder is 170-210°C, the die head temperature is 170-210°C, and the melt temperature is ≤250°C.

Further, the vibration field source in the vibration-temperature compound field airtight box can be provided by an ultrasonic generator or a vibrator.

Furthermore, the vibration-temperature compound field airtight box provided by the ultrasonic generator as the vibration field source uses water as the vibration transmission medium and heating medium, and the PP-R pipe is directly immersed in the water tank, and the ultrasonic power of the ultrasonic generator is 240W-3000W , The ultrasonic frequency is 25-80kHz, the water temperature is controllable, the temperature control range is 50-95°C, and the pipe residence time is 5-30min.

Further, the vibration-temperature compound field airtight box provided by the ultrasonic generator as the vibration field source is a temperature-controllable ultrasonic airtight water tank, with an electric heating tube inside the box and an electronic constant temperature outside the box. Temperature controller and ultrasonic controller, the top of the box is provided with a flip-type opening and closing opening, the bottom of the box is installed with an ultrasonic generator, the ultrasonic generator is connected to several ultrasonic transducers, and the other end of the ultrasonic transducer is connected to the amplitude The other end of the horn is connected to the ultrasonic welding head. The inside of the box is also provided with a porous partition and a limiting porous plate. The limiting porous plate is movably arranged above the porous partition to limit the plastic products.

Further, the vibration-temperature compound field airtight box provided by the ultrasonic generator as the source of the vibration field is also provided with a water inlet and a water outlet on the outside of the box to facilitate water inlet and outlet; a cylinder is arranged on the outside of the box, so The cylinder is used to control the opening and closing of the flip-type opening and closing port.

Further, the vibration-temperature compound field airtight box provided by the vibration exciter, the exciter is connected to the vibration table, the PP-R pipe is placed on the vibration table and fixed with a clamp, and the temperature field is heated by hot air or infrared The tube is provided, the exciting force of the exciter is 3-10kN, the temperature of the oven is 50-110°C, and the residence time of the tube is 5-30min;

Further, the vibration-temperature compound field airtight box provided by the vibration exciter, the inner wall of the box is provided with an infrared heating tube, and the box is also connected with a vibration system and an electronic constant temperature controller. The system includes an exciter, a sensor, a vibration controller and an excitation table. The exciter includes a permanent magnet speed regulating motor, an eccentric mass and an eccentric box, and the eccentric mass and the eccentric box are connected to the vibration rod of the permanent magnet speed regulating motor And it is arranged inside the box body, the vibration table is fixedly arranged on the upper part of the eccentric box, the rubber pad is fixedly arranged on the lower part of the eccentric box, the fixture is arranged on the vibration table, and the sensor is fixedly arranged under the vibration table, and the vibration control The vibration controller is arranged on the permanent magnet speed regulating motor, and the vibration controller is electrically connected with the vibration exciter and the sensor.

Further, the PP-R pipe treated by the vibration-temperature compound field is naturally cooled at room temperature.

Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

a) The present invention uses vibration and temperature composite field to process PP-R pipes, which is uniform and fast, and the vibration field and temperature field are controllable, clean and hygienic, and pollution-free;

b) The present invention uses a vibration and temperature composite field to process the extruded PP-R pipe, which saves processing time, fully eliminates the residual internal stress of the pipe, and can effectively solve the low-temperature brittleness of plastic products, and other properties of the pipe are not affected impact and cost savings.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the vibration-temperature compound field airtight box of the present invention (the source of the vibration field is an ultrasonic generator);

Fig. 2 is the side view of Fig. 1;

Fig. 3 is a schematic diagram of A-A section structure in Fig. 2;

Fig. 4 is a schematic structural diagram of a vibration-temperature compound field airtight box of the present invention (the source of the vibration field is a vibrator);

Fig. 5 is the front view of Fig. 4;

FIG. 6 is a schematic diagram of the B-B cross-sectional structure in FIG. 5 .

In the figure: 1. Ultrasonic airtight water tank; 2. Water inlet; 3. Water outlet; 4. Electric heating tube; 5. Electronic constant temperature controller; 6. Ultrasonic controller; 9. Ultrasonic transducer; 10. Horn; 11. Ultrasonic welding head; 12. Porous partition; 13. Limiting porous plate; 14. Box; 15. Cylinder; 16. Airtight oven; 15. Infrared heating tube; 18. Cabinet; 19. Electronic constant temperature controller; 20. Exciter; 21. Sensor; 22. Vibration controller; 23. Fixture; ; 26, eccentric block; 27, eccentric box; 28, rubber pad.

Detailed ways

The technical solution of the present invention will be described clearly and completely through the following examples. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

A kind of method of the present invention utilizes vibration-temperature composite field annealing to prepare high-toughness PP-R plastic pipeline, comprises the following steps:

1) Weigh the raw materials according to the formula, mix them evenly and send them to the single-screw extruder for extrusion molding to obtain the original PP-R pipe;

2) Put the original PP-R pipe in the vibration-temperature compound field airtight box, the box is equipped with a vibration field source, the temperature inside the box can be controlled and adjustable, and the original PP-R pipe is sealed in the vibration-temperature compound field The residence time in the box is 5 to 30 minutes;

3) Cool the PP-R pipe after the vibration-temperature compound field treatment to obtain a PP-R pipe resistant to low temperature brittleness.

The vibration field source in the preparation method of the present invention can be provided in two ways, one is that the vibration field source is an ultrasonic generator; the other is that the vibration field source is a vibrator.

Aspects of the device of the present invention, the pipe extruder is a conventional single-screw extruder, which is a conventional device, and will not be described in detail here;

For the vibration-temperature compound field device, when the source of the vibration field is an ultrasonic generator, the structure of the device is as follows: As shown in Figure 1-3, the structure of the vibration-temperature compound field closed box is a temperature-controllable ultrasonic airtight water tank 1, and the ultrasonic airtight The inner side of the box body 14 of the water tank 1 is provided with an electric heating tube 4, the outer side of the box body 14 is provided with an electronic constant temperature temperature controller 5 and an ultrasonic controller 6, and the top of the box body 14 is provided with a flip-type opening and closing port 7, and the box body 14 An ultrasonic generator 8 is installed at the bottom, and the ultrasonic generator 8 is connected with several ultrasonic transducers 9, and the other end of the ultrasonic transducer 9 is connected with the horn 10, and the other end of the horn 10 is connected with the ultrasonic horn 11, and the box body The inner side of 14 is also provided with a porous partition 12 and a limiting porous plate 13, and the limiting porous plate 13 is movably arranged above the porous partition 12 to limit the plastic products. A water inlet 2 and a water outlet 3 are also provided on the outside of the casing 14 to facilitate water inlet and outlet; a cylinder 15 is arranged on the outside of the casing 14, and the cylinder 15 is used to control the opening and closing of the flip-type opening and closing port 7.

When the vibration field source is an exciter, the structure of the device is as follows: as shown in Figure 4-6, the vibration-temperature composite field airtight box includes an airtight oven 16, and the inner wall of the box body 18 of the airtight oven 16 is provided with an infrared heating tube 17 , the box 18 is also connected with a vibration system and an electronic constant temperature controller 19, the vibration system includes a vibrator 20, a sensor 21, a vibration controller 22 and a vibration table 24, and the vibrator 20 includes a permanent Magnetic speed regulating motor 25, eccentric block 26 and eccentric box 27, eccentric block 26 and eccentric case 27 are connected on the vibrating bar of permanent magnet speed regulating motor 25 and are arranged on the inside of box body 18, and described excitation table 24 is fixedly arranged On the upper part of the eccentric box 27, the lower part of the eccentric box 27 is fixedly provided with a rubber pad 28, a clamp 23 is provided on the excitation table 24, a sensor 21 is fixedly provided below the excitation table 24, and the vibration controller 22 is arranged on the permanent magnet speed control system. On the motor 25 , the vibration controller 22 is electrically connected with the vibrator 20 and the sensor 21 . Through the cooperation of the vibration table 24 and the clamp 23, the contact area between the vibration system and the product is increased, and the internal stress can be eliminated better.

Concrete preparation example is as follows:

Embodiment 1 (blank control example)

Weigh the raw materials according to the formula, mix them evenly and send them into the single-screw extruder. The barrel temperature of the extruder is 200°C, and the die head temperature is 200°C. After extrusion molding, the original PP-R pipe (pipe size: dn20mm, en2 .8mm).

Example 2

Weigh the raw materials according to the formula, mix them evenly and send them into the single-screw extruder. The barrel temperature of the extruder is 170°C, and the die head temperature is 170°C. After extrusion molding, the original PP-R pipe (pipe size: dn20mm, en2 .8mm). Send the original PP-R pipe into the ultrasonic closed water tank, the ultrasonic frequency is 25kHz, the ultrasonic power is 900W, the temperature of the water tank is 50°C, and the residence time of the original PP-R pipe in the ultrasonic closed water tank is 30min. The PP-R pipe treated in an ultrasonic water bath is taken out for natural cooling to obtain a PP-R pipe resistant to low temperature brittleness.

Example 3

Weigh the raw materials according to the formula, mix them evenly and send them into the single-screw extruder. The barrel temperature of the extruder is 210°C, and the die head temperature is 210°C. After extrusion molding, the original PP-R pipe (pipe size: dn20mm, en2 .8mm). Send the original PP-R pipe into the ultrasonic closed water tank, the ultrasonic frequency is 80kHz, the ultrasonic power is 1200W, the temperature of the water tank is 95°C, and the residence time of the original PP-R pipe in the ultrasonic closed water tank is 5min. The PP-R pipe treated in an ultrasonic water bath is taken out for natural cooling to obtain a PP-R pipe resistant to low temperature brittleness.

Example 4

Weigh the raw materials according to the formula, mix them evenly and send them into the single-screw extruder. The barrel temperature of the extruder is 190°C, and the die head temperature is 190°C. After extrusion molding, the original PP-R pipe (pipe size: dn20mm, en2 .8mm). Send the original PP-R pipe into the ultrasonic airtight water tank, the ultrasonic frequency is 40kHz, the ultrasonic power is 600W, the water tank temperature is 80°C, and the residence time of the original PP-R pipe in the ultrasonic airtight water tank is 15 minutes. The PP-R pipe treated in an ultrasonic water bath is taken out for natural cooling to obtain a PP-R pipe resistant to low temperature brittleness.

Example 5

Weigh the raw materials according to the formula, mix them evenly and send them into the single-screw extruder. The barrel temperature of the extruder is 200°C, and the die head temperature is 200°C. After extrusion molding, the original PP-R pipe (pipe size: dn20mm, en2 .8mm). Send the original PP-R pipe into the ultrasonic closed water tank, the ultrasonic frequency is 40kHz, the ultrasonic power is 900W, the temperature of the water tank is 80°C, and the residence time of the original PP-R pipe in the ultrasonic closed water tank is 10 minutes. The PP-R pipe treated in an ultrasonic water bath is taken out for natural cooling to obtain a PP-R pipe resistant to low temperature brittleness.

Example 6

Weigh the raw materials according to the formula, mix them evenly and send them into the single-screw extruder. The barrel temperature of the extruder is 170°C, and the die head temperature is 170°C. After extrusion molding, the original PP-R pipe (pipe size: dn20mm, en2 .8mm). Send the original PP-R pipe into a closed oven with a vibration field provided by a vibrator, and fix it on the vibration table. The excitation force of the vibrator is 10kN, and the temperature of the oven is 50°C. The residence time in the closed oven was 30 min. The PP-R pipe treated by the vibration exciter is taken out for natural cooling to obtain a PP-R pipe resistant to low temperature brittleness.

Example 7

Weigh the raw materials according to the formula, mix them evenly and send them into the single-screw extruder. The barrel temperature of the extruder is 210°C, and the die head temperature is 210°C. After extrusion molding, the original PP-R pipe (pipe size: dn20mm, en2 .8mm). Send the original PP-R pipe into a closed oven with a vibration field provided by a vibrator, and fix it on the vibration table. The excitation force of the vibrator is 3kN, and the temperature of the oven is 110°C. The residence time in the closed oven was 5 min. The PP-R pipe treated with the vibrator is taken out for natural cooling to obtain a PP-R pipe resistant to low temperature brittleness.

Example 8

Weigh the raw materials according to the formula, mix them evenly and send them into the single-screw extruder. The barrel temperature of the extruder is 190°C, and the die head temperature is 190°C. After extrusion molding, the original PP-R pipe (pipe size: dn20mm, en2 .8mm). Send the original PP-R pipe into a closed oven with a vibration field source provided by a vibrator, and fix it on the vibration table. The excitation force of the vibrator is 3kN, and the temperature of the oven is 80°C. The residence time in the closed oven is 10min. The PP-R pipe treated by the vibration exciter is taken out for natural cooling to obtain a PP-R pipe resistant to low temperature brittleness.

Example 9

Weigh the raw materials according to the formula, mix them evenly and send them into the single-screw extruder. The barrel temperature of the extruder is 200°C, and the die head temperature is 200°C. After extrusion molding, the original PP-R pipe (pipe size: dn20mm, en2 .8mm). Send the original PP-R pipe into a closed oven with a vibration field source provided by a vibrator, and fix it on the vibration table. The excitation force of the vibrator is 5kN, and the oven temperature is 80°C. The original PP-R pipe The residence time in the closed oven is 10min. The PP-R pipe treated by the vibration exciter is taken out for natural cooling to obtain a PP-R pipe resistant to low temperature brittleness.

Embodiment 10 (heat treatment comparison group)

Weigh the raw materials according to the formula, mix them evenly and send them into the single-screw extruder. The barrel temperature of the extruder is 200°C, and the die head temperature is 200°C. After extrusion molding, the original PP-R pipe (pipe size: dn20mm, en2 .8mm). Send the original PP-R pipe into an oven at 110°C for 2 hours. The purely heat-treated PP-R pipe is taken out for natural cooling to obtain a PP-R pipe resistant to low temperature brittleness.

Drop hammer impact performance and hydrostatic performance experiments on PP-R pipes:

Table 1 Hammer head mass: 1.5kg; treatment conditions: 0°C water bath ≥ 15min; drop hammer height: 1m.

Table 2 Leakage and rupture time of pipes under hydrostatic pressure at 20°C and 16MPa (ring stress).

It can be seen from the test results that the drop hammer impact performance and hydrostatic performance of PP-R pipes treated by the vibration-temperature mixed field are improved to varying degrees. In addition, compared with the pure heat treatment effect, the treatment time is shorter and less inferior to the effect of heat treatment. Since the pure heat treatment process takes a long time and consumes a lot of energy, the process of the present application shortens the treatment time and reduces energy consumption while ensuring the effect.

Claims (10)

1. The method for preparing the high-toughness PP-R plastic pipeline by using the vibration-temperature composite field annealing is characterized by comprising the following steps of:

1) Weighing raw materials according to a formula, uniformly mixing, and then sending into a single-screw extruder for extrusion molding to obtain an original PP-R pipe;

2) Placing an original PP-R pipe in a vibration-temperature composite field closed box, wherein a vibration field source is arranged in the box body, the internal temperature of the box body is controllable and adjustable, and the retention time of the original PP-R pipe in the vibration-temperature composite field closed box is 5-30min;

3) And cooling the PP-R pipe subjected to vibration-temperature composite field treatment to obtain the PP-R pipe resistant to low-temperature brittleness.

2. The method for preparing the high-toughness PP-R plastic pipe by using the vibration-temperature composite field annealing as claimed in claim 1, wherein when the PP-R pipe is extruded by the single-screw extruder in the step 1), the barrel temperature of the extruder is 170-210 ℃, the die head temperature is 170-210 ℃, and the melt temperature is less than or equal to 250 ℃.

3. The method for preparing the high-toughness PP-R plastic pipeline by using the vibration-temperature composite field annealing as claimed in claim 1, wherein the vibration field source in the vibration-temperature composite field closed box is provided by an ultrasonic generator.

4. The method for preparing the high-toughness PP-R plastic pipeline by using the vibration-temperature composite field annealing as claimed in claim 3, wherein an ultrasonic generator is used as a closed box of a vibration field source, water is used as a vibration propagation medium and a heating medium, the PP-R pipe is directly immersed in the water tank, the ultrasonic power of the ultrasonic generator is 240W-3000W, the ultrasonic frequency is 25-80kHz, the water temperature is controllable, the temperature control range is 50-95 ℃, and the pipe residence time is 5-30min.

5. The method for preparing the high-toughness PP-R plastic pipeline by using the vibration-temperature composite field annealing is characterized in that the vibration-temperature composite field closed box is an ultrasonic closed water tank (1) with the temperature controllable, an electric heating pipe (4) is arranged on the inner side of a box body (14) of the ultrasonic closed water tank (1), an electronic constant temperature controller (5) and an ultrasonic controller (6) are arranged on the outer side of the box body (14), a flip type opening and closing opening (7) is arranged on the upper surface of the box body (14), an ultrasonic generator (8) is arranged at the bottom of the box body (14), the ultrasonic generator (8) is connected with a plurality of ultrasonic transducers (9), the other ends of the ultrasonic transducers (9) are connected with an amplitude transformer (10), the other ends of the amplitude transformer (10) are connected with an ultrasonic welding head (11), a porous partition plate (12) and a limiting porous plate (13) are further arranged on the inner side of the box body (14), and the limiting porous plate (13) is movably arranged above the porous partition plate (12) to limit the plastic product.

6. The device for removing the internal stress of the plastic product through the composite ultrasonic-thermal treatment according to claim 5, wherein a water inlet (2) and a water outlet (3) are further arranged on the outer side of the box body (14) to facilitate water inlet and outlet; an air cylinder (15) is arranged on the outer side of the box body (14), and the air cylinder (15) is used for controlling the opening and closing of the flip type opening and closing opening (7).

7. The method for preparing the high-toughness PP-R plastic pipeline by using the vibration-temperature composite field annealing as claimed in claim 1, wherein a vibration field source in the vibration-temperature composite field closed box is provided by a vibration exciter.

8. The method for preparing the high-toughness PP-R plastic pipeline by using the vibration-temperature composite field annealing as claimed in claim 7, wherein a vibration exciter is used as a closed box of a vibration field source, the vibration exciter is connected with an excitation table, the PP-R pipe is placed on the excitation table and fixed by a clamp, the temperature field is provided by a hot air or infrared heating pipe, the excitation force of the vibration exciter is 3-10 kN, the temperature of an oven is 50-110 ℃, and the stay time of the pipe is 5-30min.

9. The method for preparing the high-toughness PP-R plastic pipeline by using the vibration-temperature composite field annealing as claimed in claim 8, wherein the vibration-temperature composite field closed box comprises a closed oven (16), the inner wall of the box body (18) of the closed oven (16) is provided with an infrared heating pipe (17), the box body (18) is further connected with a vibration system and an electronic constant temperature controller (19), the vibration system comprises a vibration exciter (20), a sensor (21), a vibration controller (22) and an excitation table (24), the vibration exciter (20) comprises a permanent magnet speed regulating motor (25), an eccentric block (26) and an eccentric box (27), the eccentric block (26) and the eccentric box (27) are connected to a vibration rod of the permanent magnet speed regulating motor (25) and arranged in the box body (18), the excitation table (24) is fixedly arranged at the upper part of the eccentric box (27), the lower part of the eccentric box (27) is fixedly provided with a rubber pad (28), the excitation table (24) is provided with a clamp (23), the sensor (21) is fixedly arranged below the excitation table (24), and the vibration controller (22) is connected with the vibration controller (20) and the electric controller (21).

10. The method for manufacturing the high-toughness PP-R plastic pipeline by using the vibration-temperature composite field annealing as claimed in claim 1, wherein the PP-R pipe subjected to the vibration-temperature composite field treatment is naturally cooled at room temperature.

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