Mpp power tube and its production extruder

Abstract

The present application relates to the technical field of extruders, and discloses an mpp power tube and an extruder for producing the same, wherein the mpp power tube comprises the following raw materials in parts by weight: 70-100 parts of polypropylene, 20-40 parts of composite fillers and 1-7 parts of a silane coupling agent; the extruder for producing the mpp power tube comprises a base, an extrusion module, a driving module and a feeding module, the extrusion module and the driving module are both installed on the upper portion of the base, and the output end of the driving module is in transmission connection with the input end of the extrusion module; when the hot air in the material cylinder flows upward and back to roast the raw materials, the lifting mechanism drives the feeding groove two to lift up, so that the feeding groove one and the feeding groove two are separated, the high-temperature hot air can diffuse to the outside through the space between the feeding groove one and the feeding groove two, the continuous heating of the raw materials by heat conduction is avoided, the probability of the raw materials being roasted, softened and bonded into lumps is reduced, the worker can conveniently clean the feeding groove two, and the worker is prevented from being scalded by the high-temperature hot air.

Description

Technical Field

[0001] This invention belongs to the field of extruder technology, specifically relating to an MPP power pipe and its production extruder. Background Technology

[0002] MPP power pipes are widely used in municipal power grids, community power distribution, and road cable pre-laying projects due to their excellent high temperature resistance, external pressure resistance, insulation and corrosion resistance.

[0003] The industry generally uses single-screw extruders to complete the continuous extrusion molding of MPP pipes. The entire extrusion production line relies on the heating components on the outer wall of the extrusion barrel and the dual heating of the screw material shearing friction to melt and plasticize the polypropylene-based MPP granule raw material, and then obtain the finished pipe through die sizing, cooling traction, and fixed-length cutting.

[0004] During continuous mass production operation, the extrusion barrel is continuously heated at high temperatures by the external heating components. Simultaneously, the screw rotates at high speed driven by the drive module. The material generates significant frictional heat due to the extrusion and shearing friction between the screw and the barrel, resulting in a barrel temperature much higher than the ambient temperature at the feeding module, creating a significant longitudinal temperature gradient. The heated air and volatile gases inside the barrel experience a rapid temperature increase, and their density decreases significantly after thermal expansion. This generates a strong natural convection effect under buoyancy, causing the high-temperature, low-density gas to move upwards along the barrel's inner cavity. The feeding module, directly connected to the barrel's inner cavity through the feed port, provides a path of least resistance for the rising airflow. This creates a directional reverse airflow from inside the barrel through the feed port to the inner cavity of the feeding funnel. The high-temperature airflow flows into the inside of the feeding funnel. Since the MPP raw material particles have a low melting point, prolonged exposure to the upward-moving high-temperature airflow causes the particle surface to melt and soften prematurely. The softened material becomes more viscous. The material is highly susceptible to adhesion and clumping upon contact. This clumping gradually accumulates at the bottom of the feed hopper, continuously reducing the cross-sectional area for material flow. This can lead to product quality defects such as inconsistent feed flow rate, unstable extrusion, and excessive pipe wall thickness deviation; in severe cases, it can completely block the feed channel. While some existing extrusion equipment incorporates a simple air-cooling structure on the outer wall of the feed hopper, this only provides surface cooling and cannot prevent the high-temperature airflow from directly contacting the internal raw materials. The hot airflow can still penetrate the gaps in the raw materials and continue to bake the particles, resulting in very limited effectiveness in preventing clumping and blockage. A few solutions use extended feed pipes to insulate against heat, but this significantly increases the probability of material blockage, further complicating cleaning and hindering the rapid release of the backflowing hot airflow. Once a blockage occurs, the entire production line must be shut down, requiring manual disassembly of the hopper and removal of the clumped material. This drastically shortens continuous production time, increases maintenance costs, and severely reduces overall pipe production efficiency. Summary of the Invention

[0005] This invention provides an MPP power pipe and its production extruder, solving the technical problems mentioned in the background art.

[0006] This invention provides an MPP power pipe comprising the following raw materials in parts by weight: 70-100 parts polypropylene, 20-40 parts composite filler, 1-7 parts silane coupling agent, 4-10 parts lubricant, 7-10 parts stabilizer, 3-10 parts CPE resin, 5-10 parts plasticizer, 3-5 parts benzoylbenzene, and 5-10 parts polysuccinic acid, prepared by mixing and extrusion molding processes.

[0007] In a preferred embodiment, the MPP power pipe comprises the following raw materials in parts by weight: 90 parts polypropylene, 40 parts composite filler, 6 parts silane coupling agent, 8 parts lubricant, 10 parts stabilizer, 8 parts CPE resin, 6 parts plasticizer, 5 parts benzoylbenzene, and 8 parts polysuccinic acid.

[0008] In a preferred embodiment, the MPP power pipe comprises the following raw materials in parts by weight: 80 parts polypropylene, 30 parts composite filler, 5 parts silane coupling agent, 6 parts lubricant, 8 parts stabilizer, 6 parts CPE resin, 8 parts plasticizer, 3 parts benzoylbenzene, and 6 parts polysuccinic acid.

[0009] In a preferred embodiment, the MPP power pipe comprises the following raw materials in parts by weight: 75 parts polypropylene, 25 parts composite filler, 6 parts silane coupling agent, 4 parts lubricant, 6 parts stabilizer, 8 parts CPE resin, 5 parts plasticizer, 4 parts benzoylbenzene, and 9 parts polysuccinic acid.

[0010] This invention provides an extruder for producing MPP power pipes, including a base, an extrusion module, a drive module, and a feeding module. The extrusion module and the drive module are both installed on the upper part of the base. The output end of the drive module and the input end of the extrusion module are connected by a transmission. The feeding module is installed on the upper part of the extrusion module and includes a first feeding groove and a second feeding groove. The first feeding groove is fixedly connected to the upper part of the extrusion module, and the second feeding groove is located on the upper part of the first feeding groove. The axis of the first feeding groove and the axis of the second feeding groove are collinear, and the second feeding groove is driven to move vertically reciprocating.

[0011] In a preferred embodiment, a lifting mechanism is provided on the upper part of the extrusion module. The lifting mechanism is used to drive the feed trough 2 to move vertically back and forth. The lifting mechanism includes two electric push rods 1. The electric push rods 1 are fixed on the upper part of the extrusion module and arranged vertically. The output end of the electric push rods 1 is fixedly connected to one side of the feed trough 2.

[0012] In a preferred embodiment, the lifting mechanism further includes multiple limiting rods and multiple fixing plates. The fixing plates are symmetrically distributed on both sides of the feed trough. The limiting rods are slidably connected to the fixing plates and are arranged vertically. The lower end of the limiting rods is fixedly connected to the extrusion module.

[0013] In a preferred embodiment, a closing mechanism is provided between the second feed trough and the first feed trough. The closing mechanism includes two sliding plates, which are arranged horizontally and slidably connected to the second feed trough. The two sliding plates are driven to slide horizontally towards each other.

[0014] In a preferred embodiment, the closing mechanism further includes two limiting plates, which are fixedly connected to the lower sides of the feed trough two, and the two limiting plates are arranged in parallel. The upper part of the sliding plate one has two limiting grooves, which are T-shaped structures. The groove direction of the limiting groove is consistent with the length direction of the sliding plate one. The limiting plate is located in the limiting groove and forms a sliding guide cooperation with the limiting groove.

[0015] In a preferred embodiment, the sliding plate is provided with a plurality of vent holes, which are arranged in an array on the side of the sliding plate away from the limiting plate.

[0016] The beneficial effects of this invention are as follows: 1. This invention utilizes the cooperation of feed trough one and feed trough two. During normal production, feed trough two descends to fit against feed trough one, forming a complete feeding channel to ensure continuous feeding of raw materials. When the hot airflow inside the barrel flows upward to bake the raw materials, the lifting mechanism drives feed trough two to rise, separating feed trough one and feed trough two, forming an open heat dissipation gap between them. The high-temperature hot airflow that surges upward from the extrusion barrel can directly diffuse outward through the gap between the two sections of the trough, preventing the high-temperature hot airflow from entering feed trough two and burning the workers cleaning feed trough two. This completely opens up the hot airflow discharge channel, preventing the heat conduction between feed trough one and feed trough two from continuously heating the raw materials, reducing the probability of the raw materials being baked, softened, or clumped together. At the same time, it facilitates workers cleaning feed trough two and prevents the high-temperature hot airflow from burning workers.

[0017] 2. This invention, through the cooperation of sliding plate one and the drive mechanism, closes the two sliding plates one before lifting the feed trough two, pre-closing the bottom discharge port of feed trough two, thus completely holding the MPP raw material inside feed trough two. During the lifting process, the raw material will not fall into the gap between feed trough one and feed trough two, completely avoiding the accumulation of fallen raw material at the top of the high-temperature feed trough one, and preventing raw material from getting stuck between feed trough one and feed trough two, causing the problem of raw material carbonization between them. When cleaning feed trough two, the lumps and carbonized residues are intercepted by the sliding plates in feed trough two and will not fall into feed trough one and extrusion barrel. This prevents hard coke blocks from scratching the inner wall of extrusion barrel and clogging the gap of extrusion screws during screw conveying, avoiding extrusion screw jamming and shutdown, protecting the core components of the extrusion host, and extending the service life of the equipment. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of the present invention.

[0019] Figure 2 This is a cross-sectional view of the extrusion module of the present invention.

[0020] Figure 3 This is a schematic diagram of the feed trough of the present invention.

[0021] Figure 4 This is a cross-sectional view of the feed trough of the present invention.

[0022] Figure 5 This is the invention Figure 4 Enlarged view of point A in the middle.

[0023] Figure 6 This is a schematic diagram of the sliding plate of the present invention.

[0024] Figure 7 This is a cross-sectional view of the feeding module of the present invention.

[0025] Figure 8 This is the present invention. Figure 7 Enlarged view of point B in the middle.

[0026] In the diagram: 1. Base; 2. Extrusion module; 21. Outer shell; 22. Extrusion barrel; 23. Extrusion screw; 24. Heating assembly; 3. Drive module; 4. Feeding module; 41. Feeding trough one; 411. Receiving shell; 42. Feeding trough two; 5. Lifting mechanism; 51. Electric push rod one; 52. Limiting rod; 53. Fixing plate; 6. Closing mechanism; 61. Sliding plate one; 611. Limiting groove; 612. Passive groove; 62. Limiting plate; 7. Drive mechanism; 71. Electric push rod two; 72. Sliding plate two. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0028] Example 1 An MPP power pipe comprises the following raw materials in parts by weight: 70-100 parts polypropylene, 20-40 parts composite filler, 1-7 parts silane coupling agent, 4-10 parts lubricant, 7-10 parts stabilizer, 3-10 parts CPE resin, 5-10 parts plasticizer, 3-5 parts benzoylbenzene, and 5-10 parts polysuccinic acid, prepared by mixing and extrusion molding processes.

[0029] Example 2 An MPP power pipe comprises the following raw materials in parts by weight: 90 parts polypropylene, 40 parts composite filler, 6 parts silane coupling agent, 8 parts lubricant, 10 parts stabilizer, 8 parts CPE resin, 6 parts plasticizer, 5 parts benzoylbenzene, and 8 parts polysuccinic acid.

[0030] Example 3 An MPP power pipe comprises the following raw materials in parts by weight: 80 parts polypropylene, 30 parts composite filler, 5 parts silane coupling agent, 6 parts lubricant, 8 parts stabilizer, 6 parts CPE resin, 8 parts plasticizer, 3 parts benzoylbenzene, and 6 parts polysuccinic acid.

[0031] Example 4 An MPP power pipe comprises the following raw materials in parts by weight: 75 parts polypropylene, 25 parts composite filler, 6 parts silane coupling agent, 4 parts lubricant, 6 parts stabilizer, 8 parts CPE resin, 5 parts plasticizer, 4 parts benzoylbenzene, and 9 parts polysuccinic acid.

[0032] Example 5 like Figure 1 , Figure 2 As shown, an extruder for producing MPP power pipes includes a base 1, an extrusion module 2, a drive module 3, and a feeding module 4. The extrusion module 2 and the drive module 3 are both installed on the upper part of the base 1. The output end of the drive module 3 is connected to the input end of the extrusion module 2. The feeding module 4 is installed on the upper part of the extrusion module 2 and includes a first feeding groove 41 and a second feeding groove 42. The first feeding groove 41 is fixedly connected to the upper part of the extrusion module 2, and the second feeding groove 42 is located on the upper part of the first feeding groove 41. The axis of the first feeding groove 41 and the axis of the second feeding groove 42 are collinear, and the second feeding groove 42 moves vertically reciprocally under drive.

[0033] Specifically, the upper part of the extrusion module 2 is provided with a lifting mechanism 5. The lifting mechanism 5 is used to drive the feed trough 42 to move vertically back and forth. The lifting mechanism 5 includes two electric push rods 51. The electric push rods 51 are fixed on the upper part of the extrusion module 2. The electric push rods 51 are arranged vertically. The output end of the electric push rods 51 is fixedly connected to one side of the feed trough 42. It should be added that the lifting mechanism 5 also includes multiple limit rods 52 and multiple fixing plates 53. The fixing plates 53 are symmetrically distributed on both sides of the feed trough 42. The limit rods 52 are slidably connected to the fixing plates 53. The limit rods 52 are arranged vertically, and the lower end of the limit rods 52 is fixedly connected to the extrusion module 2. Additionally, the extrusion module 2 includes at least an extrusion screw 23, an extrusion barrel 22, a heating assembly 24, and a housing 21. The heating assembly 24 is installed on the outer wall of the extrusion barrel 22. The extrusion screw 23 is rotatably connected to the extrusion barrel 22. The extrusion barrel 22 is fixedly connected to the base 1. The extrusion barrel 22 has a feed hole, and a feed groove 41 is correspondingly provided to the feed hole. The feed groove 41 is fixedly connected to the extrusion barrel 22. The housing 21 is fixedly connected to the extrusion barrel 22. The two electric push rods 51 and multiple limiting rods 52 are divided into two groups. Each group includes one electric push rod 51 and two limiting rods 52. One group of electric push rods 51 and two limiting rods 52 is installed on the housing 21, and the other group of electric push rods 51 and two limiting rods 52 is installed on the base 1 (see reference). Figure 2 ); It should be added that the drive module 3 includes at least a motor and a reducer. The reducer is installed on the upper part of the base 1, and the motor is fixedly connected to the base 1. The drive end of the motor is driven to the input end of the reducer, and the output end of the reducer is driven to the extrusion screw 23. By driving the reducer to rotate through the motor, the high-speed, low-torque power of the motor can be converted into high-torque, low-speed rotation power, thereby driving the extrusion screw 23 to rotate. This is existing technology and will not be described in detail. It should be added that a through hole is provided in the middle of the fixing plate 53, and the limiting rod 52 is located inside the through hole and forms a sliding guide engagement with the through hole, that is, the limiting rod 52 is slidably connected to the fixing plate 53 through the through hole; It should be added that the second feed trough 42 has a rising state and a falling state. The falling state is the initial state of the second feed trough 42. When the second feed trough 42 is in the falling state, the lower part of the second feed trough 42 abuts against the upper part of the first feed trough 41, the electric actuator 51 is in the retracted state, and the fixing plate 53 is located in the middle of the limiting rod 52. Figure 3 As shown; when the second feed trough 42 is in the rising state, there is a gap between the second feed trough 42 and the first feed trough 41, the first electric push rod 51 is in the extended state, and the fixing plate 53 is located above the limiting rod 52 (not shown).

[0034] When the device is operating normally, feed trough 2 42 is in its initial state, that is, feed trough 2 42 is in a descending state. At this time, feed trough 2 42 is attached to the upper part of feed trough 1 41, and feed trough 1 41 and feed trough 2 42 form a smooth flow channel. The motor starts and drives the reducer to run, and the reducer drives the extrusion screw 23 to rotate. At this time, the raw material produced by the electric tube is put into feed trough 2 42. The raw material can be transferred from feed trough 1 41 and feed trough 2 42 into the extrusion barrel 22. Through the rotation of the extrusion screw 23, the raw material is pushed to move towards the outlet end of the extrusion barrel 22. During the material movement, the friction between the extrusion screw 23 and the extrusion barrel 22... The friction and extrusion process generates high temperatures, melting the solid raw material into a molten state. The molten material is then discharged from the outlet of the extrusion cylinder 22. The resulting billet is introduced into a cooling device to cool it. After cooling, the billet is cut to a fixed length, thus realizing the production of power tubes. When the material at the feed port of the extrusion cylinder 22 heats the air and surges upwards from the discharge port, this high-temperature hot airflow may heat the raw material inside feed troughs 41 and 42, causing the raw material to soften. The softened material may then adhere to each other, potentially clogging the lower part of feed troughs 41 and 42. In this case, [further action is needed]. To stop the machine and remove the adhering raw material in feed trough 41 and feed trough 42, to prevent the material from softening further due to continuous heating during the cleaning process, move this part of the material away from the extrusion cylinder 22. Start the electric actuator 51 to push feed trough 42 upwards, disengaging it from feed trough 41. At this point, the lower end of feed trough 42 is no longer in contact with feed trough 41, and the high temperature of feed trough 41 cannot transfer heat to feed trough 42. This prevents the raw material inside feed trough 42 from softening due to heat. Simultaneously, because the space between feed trough 41 and feed trough 42 is opened, the material... The unobstructed space between the two provides a channel for the high-temperature hot airflow to leave the extrusion barrel 22, allowing the high-temperature hot airflow to leave from one side of the feed trough 2 42, which is conducive to heat dissipation and can also prevent the high-temperature hot airflow from entering the feed trough 2 42 and scalding the workers cleaning the feed trough 2 42. Through the cooperation of the feed trough 1 41 and the feed trough 2 42, the feed trough 2 42 descends and fits against the feed trough 1 41 during normal production, forming a complete feeding channel to ensure continuous feeding of raw materials. When the hot airflow in the barrel flows upward to bake the raw materials, the lifting mechanism 5 drives the feed trough 2 42 to rise, so that the feed trough 1 41 and the feed trough 2 42 separate, forming an open heat dissipation gap between them.The high-temperature hot airflow rising upwards from the extrusion cylinder 22 can diffuse directly outwards through the gap between the two sections of the tank, preventing the hot airflow from entering the second feed trough 42 and scalding the workers cleaning it. This completely clears the hot airflow exhaust channel, preventing continuous heating of the raw material through heat conduction between the first feed trough 41 and the second feed trough 42, reducing the probability of the raw material being baked, softened, or clumped together. It also facilitates cleaning the second feed trough 42 and prevents workers from being scalded by the hot airflow.

[0035] Example 6 In the above embodiment, if the feed trough 2 42 is directly driven to rise from the descending state to the rising position, the bottom discharge channel of feed trough 2 42 will be completely open. The MPP particles and agglomerated materials inside feed trough 2 42 will easily fall downwards and accumulate in the gap between feed trough 1 41 and feed trough 2 42, and in the upper area of ​​feed trough 1 41. Feed trough 1 41 is directly connected to the high-temperature extrusion cylinder 22. The material falling into the gap will be continuously baked by the residual heat of the cylinder for a long time, gradually melting, carbonizing and coking. The carbonized coke will not only block the heat exchange gap between the two feed troughs, hindering the outward dissipation of the backflowing high-temperature hot air, and aggravating the problem of premature softening and blockage of raw materials, but will also fall into the gap after the equipment resumes production. Inside the extrusion barrel 22, hard coke blocks can easily scratch the inner wall of the barrel and jam the extrusion screw 23 after entering the screw extrusion channel, causing the screw to jam and stop. At the same time, carbonized impurities mixed into the molten material can cause defects such as black spots, holes, and uneven wall thickness in the MPP power pipe, which greatly increases the frequency of equipment maintenance and pipe scrapping losses, and increases the operation and maintenance cost of the production line. Therefore, in order to solve the above technical problems, in this embodiment, a closing mechanism 6 is provided between the second feed trough 42 and the first feed trough 41. The closing mechanism 6 includes two sliding plates 61, which are arranged horizontally and slidably connected to the second feed trough 42. The two sliding plates 61 are driven to slide horizontally in opposite directions.

[0036] Additionally, the closing mechanism 6 also includes two limiting plates 62, which are fixedly connected to the lower sides of the second feed trough 42. The two limiting plates 62 are arranged in parallel. The upper part of the first sliding plate 61 has two limiting grooves 611. The limiting grooves 611 have a T-shaped structure. The groove direction of the limiting grooves 611 is consistent with the length direction of the first sliding plate 61. The limiting plates 62 are located in the limiting grooves 611 and form a sliding guide cooperation with the limiting grooves 611. That is, the first sliding plate 61 is slidably connected to the limiting plate 62 through the limiting grooves 611, that is, the first sliding plate 61 is slidably connected to the second feed trough 42. The first sliding plate 61 has multiple exhaust holes, which are arranged in an array on the side of the first sliding plate 61 away from the limiting plates 62. Specifically, the side wall of the feed trough 41 is provided with two receiving shells 411, which are arranged opposite to each other. The receiving shells 411 are hollow structures, and the internal space of the receiving shells 411 is connected to the internal space of the feed trough 41. The sliding plate 61 is located inside the receiving shell 411. A driving mechanism 7 is provided on one side of the receiving shell 411. The driving mechanism 7 is used to drive the two sliding plates 61 to slide horizontally towards each other. Specifically, the drive mechanism 7 includes two sliding plates 72 and two electric push rods 71. The sliding plates 72 are located inside the housing 411. The electric push rods 71 ​​are fixedly connected to the housing 411. The drive end of the electric push rods 71 ​​passes through the housing 411 and is fixedly connected to the sliding plates 72. The sliding plates 72 are slidably connected to the sliding plate 61. It should be added that a passive groove 612 is provided on the side of the sliding plate 61 near the electric actuator 71. The sliding plate 72 is arranged vertically and is located inside the passive groove 612. It forms a sliding guide engagement with the passive groove 612, that is, the sliding plate 72 is slidably connected to the sliding plate 61 through the passive groove 612. It should be added that the two sliding plates 61 have closed and open states. The open state is the initial state of the sliding plates 61. When the two sliding plates 61 are in the open state, the feed chute 42 is in the descending state, and the two sliding plates 61 are moving away from each other (see reference). Figure 6 The limiting plate 62 is located inside the limiting groove 611, away from one end of the electric push rod 71. The sliding plate 61 is located inside the receiving shell 411, and the sliding plate 61 is located below the sliding plate 72. When the sliding plate 61 is in the closed state, the feed chute 42 is in the raised state, and the two sliding plates 61 abut against each other (see reference). Figure 7 The limiting plate 62 is located in the limiting groove 611 near one end of the electric push rod 71, and the sliding plate 61 is located above the sliding plate 72.

[0037] Before the feed trough 2 42 moves upward, that is, before switching from the descending state to the ascending state, the electric actuators 2 71 on both sides of the feed trough 1 41 are activated. The electric actuators 2 71 push the two sliding plates 2 72 closer together. The movement of the sliding plates 2 72 pushes the sliding plate 1 61 along the limiting plate 62, meaning the two sliding plates 1 61 slide closer together. The limiting plate 62 keeps the sliding plates 1 61 moving horizontally during this process. When the two sliding plates 1 61 are pressed together, that is, when the sliding plates 1 61 switch from the open state to the closed state, the lower part of the feed trough 2 42 is blocked by the two sliding plates 1 61, preventing the raw material from moving downwards. Then... When the electric actuator 51 is activated, it pushes the feed trough 42 upward, separating it from the feed trough 42. This means the feed trough 42 switches from a descending state to a rising state. During this process, the feed trough 42 drives the sliding plate 61 to move upward synchronously. At this time, the opposite ends of the two sliding plates 61 slide along the outer wall of the sliding plate 72, allowing them to move upward. When the feed trough 42 reaches its highest point, i.e., when it is in the rising state, the sliding plates 61 are positioned on the upper part of the inner wall of the receiving shell 411. Because the lower part of the feed trough 42 is blocked by the two sliding plates 61, the feed trough 42 and the feed trough 42 are separated. The space between feed troughs 41 is separated, and there is a gap between feed trough 42 and feed trough 41. The high-temperature hot air flow in the extrusion barrel 22 can move upward and leave through multiple exhaust holes on the sliding plate 61. That is, the high-temperature air moves upward from feed trough 41 and passes through the exhaust holes, and then leaves between feed trough 41 and feed trough 42. This prevents agglomerated or carbonized material in feed trough 42 from entering the interior of the extrusion barrel 22 when cleaning feed trough 42. Through the cooperation of sliding plate 61 and drive mechanism 7, before raising feed trough 42, the two sliding plates 61 are closed to pre-close the bottom discharge port of feed trough 42, thus removing the MPP material in the trough. The material is completely held inside the second feed trough 42; during the lifting and raising process, the material will not fall into the gap between the first feed trough 41 and the second feed trough 42, completely avoiding the accumulation of fallen material at the top of the high-temperature first feed trough 41, and preventing the material from getting stuck between the first feed trough 41 and the second feed trough 42, causing the material to carbonize between them; when cleaning the second feed trough 42, the lumps and carbonized residues are intercepted by the sliding plate inside the second feed trough 42 and will not fall into the first feed trough 41 and the extrusion barrel 22; this prevents hard coke blocks from scratching the inner wall of the extrusion barrel 22 and blocking the gap of the extrusion screw 23 during screw conveying, avoiding the extrusion screw 23 from jamming and stopping the machine, protecting the core components of the extrusion host, and extending the service life of the equipment.

[0038] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. An MPP power conduit, characterized in that, The raw materials include the following parts by weight: 70-100 parts polypropylene, 20-40 parts composite filler, 1-7 parts silane coupling agent, 4-10 parts lubricant, 7-10 parts stabilizer, 3-10 parts CPE resin, 5-10 parts plasticizer, 3-5 parts benzoylbenzene, and 5-10 parts polysuccinic acid, which are prepared by mixing and extrusion molding processes.

2. The MPP power conduit according to claim 1, characterized in that, The raw materials include the following parts by weight: 90 parts polypropylene, 40 parts composite filler, 6 parts silane coupling agent, 8 parts lubricant, 10 parts stabilizer, 8 parts CPE resin, 6 parts plasticizer, 5 parts benzoylbenzene, and 8 parts polysuccinic acid.

3. The MPP power conduit according to claim 1, characterized in that, The raw materials include the following parts by weight: 80 parts polypropylene, 30 parts composite filler, 5 parts silane coupling agent, 6 parts lubricant, 8 parts stabilizer, 6 parts CPE resin, 8 parts plasticizer, 3 parts benzoylbenzene, and 6 parts polysuccinic acid.

4. An MPP power conduit according to claim 1, characterized in that, The raw materials include the following parts by weight: 75 parts polypropylene, 25 parts composite filler, 6 parts silane coupling agent, 4 parts lubricant, 6 parts stabilizer, 8 parts CPE resin, 5 parts plasticizer, 4 parts benzoylbenzene, and 9 parts polysuccinic acid.

5. An MPP power pipe production extruder as described in claim 1, comprising a base (1), an extrusion module (2), a drive module (3), and a feeding module (4), wherein the extrusion module (2) and the drive module (3) are both installed on the upper part of the base (1), the output end of the drive module (3) is connected to the input end of the extrusion module (2) via a transmission connection, and the feeding module (4) is installed on the upper part of the extrusion module (2), characterized in that, The feeding module (4) includes a feeding trough one (41) and a feeding trough two (42). The feeding trough one (41) is fixedly connected to the upper part of the extrusion module (2), and the feeding trough two (42) is set on the upper part of the feeding trough one (41). The axis of the feeding trough one (41) and the axis of the feeding trough two (42) are collinear. The feeding trough two (42) is driven to move vertically back and forth.

6. An extruder for producing MPP power pipes according to claim 5, characterized in that, The upper part of the extrusion module (2) is provided with a lifting mechanism (5). The lifting mechanism (5) is used to drive the feed trough (42) to move vertically back and forth. The lifting mechanism (5) includes two electric push rods (51). The electric push rods (51) are fixed on the upper part of the extrusion module (2). The electric push rods (51) are arranged vertically. The output end of the electric push rods (51) is fixedly connected to one side of the feed trough (42).

7. An extruder for producing MPP power pipes according to claim 6, characterized in that, The lifting mechanism (5) also includes multiple limiting rods (52) and multiple fixing plates (53). The fixing plates (53) are symmetrically distributed on both sides of the feed trough (42). The limiting rods (52) are slidably connected to the fixing plates (53). The limiting rods (52) are arranged vertically, and the lower end of the limiting rods (52) is fixedly connected to the extrusion module (2).

8. An extruder for producing MPP power pipes according to claim 7, characterized in that, A closing mechanism (6) is provided between the second feed trough (42) and the first feed trough (41). The closing mechanism (6) includes two sliding plates (61). The sliding plates (61) are arranged horizontally and are slidably connected to the second feed trough (42). The two sliding plates (61) are driven to slide horizontally towards each other.

9. An extruder for producing MPP power pipes according to claim 8, characterized in that, The closing mechanism (6) also includes two limiting plates (62). The two limiting plates (62) are fixedly connected to the lower sides of the feed trough (42). The two limiting plates (62) are arranged in parallel. The upper part of the sliding plate (61) has two limiting grooves (611). The limiting grooves (611) are T-shaped structures. The groove direction of the limiting grooves (611) is consistent with the length direction of the sliding plate (61). The limiting plates (62) are located in the limiting grooves (611) and form a sliding guide fit with the limiting grooves (611).

10. An extruder for producing MPP power pipes according to claim 9, characterized in that, Multiple vent holes are provided on the sliding plate (61), and the multiple vent holes are arranged in an array on the side of the sliding plate (61) away from the limiting plate (62).

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