Preparation process of flame-retardant plastic weather-resistant color master batch

Abstract

The invention relates to the technical field of color master batch preparation, and particularly discloses a flame-retardant plastic weather-resistant color master batch preparation process, an extruding and cooling link of color master batch is completed by using an extruder and a cooling tank, and when a color master batch strip extruded by the extruder is deformed, a machine head of the extruder is cleaned by using a cleaning mechanism; the color master strips before and after cleaning are in a continuous state; wherein the cleaning mechanism comprises a moving seat, and a moving assembly can move in the direction close to or away from the machine head and is arranged on the cooling tank; the cooling and gettering assembly is arranged in the moving seat and is used for cooling, shaping and cleaning impurities of the blocking material at the outlet of the machine head; a part of the compensation assembly can be movably arranged in the moving seat; the scraping assembly is located in the moving seat in the direction close to the machine head; the power assembly is fixedly arranged on the cooling tank, connected to the movable base and used for driving the movable base to move. The invention aims to effectively clean impurities on the machine head under the condition of not interrupting production.

Description

Technical Field

[0001] The invention relates to the technical field of masterbatch preparation, in particular to a process for preparing flame-retardant plastic weather-resistant masterbatch. Background Art

[0002] In the field of preparation of plastic weather-resistant masterbatch, although the extruder can mix and extrude a variety of raw materials, due to the large differences in the characteristics of the various auxiliary materials involved, such as flame retardants, etc., it is easy to cause uneven mixing in the mixing process due to insufficient stirring and different material specific gravity; at the same time, the unreasonable layout and power setting of the heating components inside the extruder will cause uneven heating of the material, and the instability of the feeding system and the difference in feeding speed of each part will also cause inconsistent feeding speed; these factors combined make the material frequently appear abnormal component aggregation at the die outlet, forming impurities and adhering to the die outlet; this situation directly causes the output masterbatch to be bent, spiral or other irregular shapes, seriously affecting the product quality and appearance; the traditional solution is mostly to stop the machine to clean the die impurities, but this will not only interrupt the production process and reduce production efficiency, but also cause a great waste of resources; and frequent shutdown and start-up will also damage the equipment itself, increase the equipment maintenance cost and maintenance frequency, which is not conducive to the application and promotion of the plastic weather-resistant masterbatch preparation process in large-scale production, so there is an urgent need for a technical solution that can effectively clean the die impurities without interrupting production to overcome the defects of the existing process. Summary of the invention

[0003] The embodiment of the present application provides a process for preparing a flame-retardant plastic weather-resistant masterbatch, the main purpose of which is to effectively clean impurities in the machine head without interrupting production.

[0004] To achieve the above-mentioned purpose, the embodiment of the present application provides a flame-retardant plastic weather-resistant masterbatch preparation process, which has an extruder and a cooling tank to complete the extrusion cooling link of the masterbatch. When the masterbatch extruded by the extruder is deformed, a cleaning mechanism is used to clean the head of the extruder, and the masterbatch before and after cleaning is in a continuous state; Wherein, the cleaning mechanism includes a movable seat and further includes: A moving assembly, which is capable of moving toward or away from the machine head, is disposed on the cooling groove and is connected to the outer side of the moving seat; A cooling impurity absorption component is arranged in the movable seat and is used to cool and shape the blocked material at the outlet of the die head and to clean the impurities; A compensation component, part of which is movably disposed in the movable seat and in contact with each of the masterbatch strips; A scraping assembly is located in the movable seat in a direction close to the machine head; A power assembly is fixedly mounted on the cooling tank and connected to the moving seat, and is used to drive the moving seat to move; The drive controller is signal-connected to the power component, the compensation component and the cooling and impurity-gettering component.

[0005] In a feasible embodiment, the cooling and impurity absorption component includes: an air suction hole is opened in the inner wall of the movable seat, the outer end of the air suction hole is connected to an air suction pump, and the air suction pump signal is connected to the drive controller; a snap-fit ​​groove is opened in the movable seat at one end facing the machine head, and matches the shape and position of the machine head; a debris collecting groove is opened in the inner wall of the bottom end of the snap-fit ​​groove, and the debris collecting groove is located below the machine head outlet when the machine head is docked; an air inlet hole is opened in the inner wall of the movable seat; one end of a plurality of cooling holes is arranged corresponding to each of the machine head outlets, and the other ends of the plurality of cooling holes are all connected to the air inlet hole.

[0006] In a feasible embodiment, the compensation component includes: a driving motor is fixed at the top of the moving seat; a transmission box is fixed inside the moving seat, and its top is the power input end, and the power input end is connected to the output end of the driving motor; an export roller is rotatably arranged in the inner wall of the moving seat away from the machine head; a first gear is fixedly arranged at the end of the export roller and meshed with the output gear at the bottom of the transmission box; a second gear is meshed and connected to the first gear; a worm is rotatably arranged in the inner cavity in the middle of the moving seat, and is fixedly connected to the second gear.

[0007] In a feasible embodiment, the scraping assembly includes: a first baffle plate perpendicular to the discharge direction of the masterbatch, the first baffle plate is arranged in the movable seat; the second baffle plate is arranged in the movable seat next to the first baffle plate; and a transmission inner cavity is formed between the second baffle plate and the first baffle plate, and the worm is located in the transmission inner cavity; one end of a plurality of transmission cylinders can extend into the outlet of the machine head, and the other end extends toward the other end of the movable seat and is fixed to the first baffle plate; a plurality of worm gears are rotatably mounted on the outer side of the outer wall of each transmission cylinder, and mesh with the worm gear; an extension cylinder is rotatably mounted on the outer side of the outer wall of the transmission cylinder, one end of the extension cylinder is fixedly connected to the worm gear, and the other end movably passes through the second baffle plate; a plurality of scrapers are fixed in an inclined state axially and equidistantly on the end of the extension cylinder close to one end of the machine head.

[0008] In a feasible embodiment, chamfers are provided on the inner walls at both ends of the transfer tube, and one end of the transfer tube that can extend into the outlet of the machine head is sharp. A stress sensor is also provided between the transfer tube and the first baffle, and the signal output end of the stress sensor is connected to the drive controller. The stress sensor is used to sense the abnormal state of the masterbatch during operation.

[0009] In a feasible implementation manner, a position sensor is further provided on the head of the extruder, and the position sensor corresponds to the outer wall of the movable seat and is used to sense the moving position of the movable seat.

[0010] In a feasible implementation, the ends of the plurality of scrapers close to the die head are located in the same plane, and all of the scrapers can fit on the outer wall at the die head outlet.

[0011] In a feasible embodiment, a plurality of export wheels are arranged on the export roller, each of which has an export groove in the middle, a rubber film is arranged on the inner wall of each export groove, and the rubber film contacts the outer wall of the bottom end of the masterbatch.

[0012] The present application provides a flame-retardant and weather-resistant plastic masterbatch preparation process, which can clean the extruder head without interrupting the production of the masterbatch through the setting of a cleaning mechanism, effectively maintaining the continuous state of the masterbatch before and after cleaning, greatly improving the continuity of the production process, and avoiding a significant reduction in production efficiency due to shutdown for cleaning impurities in the head; a cooling and impurity suction component is provided to cool, shape and clean impurities generated at the outlet of the head due to material mixing, heating, and uneven feeding, effectively preventing further adhesion of impurities, ensuring the quality of the output material, and making the quality of the subsequently extruded masterbatch stable and the shape standardized, significantly improving the product quality; a compensation component is provided to ensure that the masterbatch will not experience production interruption or accumulation during the cleaning process, further enhancing the stability of the production process; a scraping component is provided to thoroughly remove residual impurities on the surface of the head, so the present application overall improves the reliability and economy of the flame-retardant and weather-resistant plastic masterbatch preparation process, and provides strong technical support for large-scale industrial production. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A schematic diagram of the three-dimensional structure of a cleaning mechanism and a cooling tank in the process for preparing a flame-retardant plastic weather-resistant masterbatch provided in an embodiment of the present application is shown; Figure 2 A schematic structural diagram showing a cleaning mechanism in a cleaning position in a process for preparing a flame-retardant plastic weather-resistant masterbatch provided in an embodiment of the present application; Figure 3 A schematic diagram of the structure of a mobile assembly provided in an embodiment of the present application is shown; Figure 4 A schematic diagram of the structure of the lead-out roller provided in an embodiment of the present application is shown; Figure 5 A schematic diagram of the structure of a first gear and a second gear provided in an embodiment of the present application is shown; Figure 6 A schematic diagram of the structure of a cooling gettering assembly provided in an embodiment of the present application is shown; Figure 7 A schematic diagram of the structure of the cooling hole provided in an embodiment of the present application is shown; Figure 8 A schematic diagram of the structure of a scraping assembly and a worm provided in an embodiment of the present application is shown; Fig. 9 A schematic diagram of the structure of a scraping assembly provided in an embodiment of the present application is shown; Fig.10 A schematic structural diagram of a debris collecting tank provided in an embodiment of the present application is shown.

[0014] In the figure: 10, cooling trough, 20, support rod, 30, extruder, 40, cleaning mechanism, 50, masterbatch, 31, head, 32, position sensor, 41, moving component, 42, cooling and impurity suction component, 43, compensation component, 44, power component, 45, scraping component, 421, air suction hole, 422, snap-fit ​​groove, 423, impurity collection groove, 424, air inlet, 425, cooling hole, 431, driving motor, 432, transmission box, 433, lead-out roller, 434, first gear, 435, second gear, 436, worm, 451, transfer cylinder, 452, worm wheel, 453, extension cylinder, 454, scraper, 455, first baffle, 456, second baffle. DETAILED DESCRIPTION

[0015] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0016] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0017] Example 1 See also Figures 1 to 10As shown, an embodiment of the present application provides a flame-retardant plastic weather-resistant masterbatch preparation process, which has an extruder 30 and a cooling tank 10 to complete the extrusion cooling process of the masterbatch. When the masterbatch 50 extruded by the extruder 30 is deformed, the cleaning mechanism 40 is used to clean the head 31 of the extruder 30, and the masterbatch 50 before and after cleaning is in a continuous state.

[0018] In the preparation process of flame-retardant plastic weather-resistant masterbatch, the extruder 30 is responsible for mixing and extruding a variety of raw materials, and the cooling tank 10 is used to cool and shape the newly extruded high-temperature masterbatch 50. The cooling tank 10 is provided with a plurality of support rods 20 for supporting and preventing the masterbatch 50 from bottoming out. During the extrusion process, due to the different characteristics of the various auxiliary materials used (such as the addition of flame retardants), the mixing may be uneven due to insufficient stirring, differences in material specific gravity, etc.; at the same time, the distribution and power setting of the heating components inside the extruder 30 may cause uneven heating of the material; furthermore, the stability of the feeding system and the difference in feeding speed of each part may also lead to uneven feeding speed. These factors combined make it easy for some components of the material to aggregate abnormally at the outlet of the die head 31, and then form impurities attached to the outlet of the die head 31, which will cause the masterbatch 50 produced by the material to be curved, spiral or other irregular shapes. When the masterbatch 50 extruded by the extruder 30 is deformed, the cleaning mechanism 40 is activated. This cleaning mechanism 40 can ensure that the production of the masterbatch 50 is not interrupted, that is, while ensuring that the masterbatch 50 before and after cleaning is in a continuous state, the head 31 is cleaned to ensure that the masterbatch subsequently extruded by the extruder 30 is of stable quality and standardized in shape, effectively improving the reliability and product quality of the entire plastic weather-resistant masterbatch preparation process, and avoiding adverse consequences such as reduced production efficiency and waste of resources caused by frequent shutdowns for cleaning due to impurity problems in the head 31.

[0019] Among them, the cleaning mechanism 40 includes a moving seat, and also includes a moving component 41, a cooling and impurity-absorbing component 42, a compensation component 43, a power component 44, a scraping component 45 and a drive controller. The moving component 41 can be moved close to or away from the head 31 and is arranged on the cooling groove 10, and is connected to the outside of the moving seat; the cooling and impurity-absorbing component 42 is arranged in the moving seat, and is used to cool and shape the blocked material at the outlet of the head 31 and clean the impurities; part of the compensation component 43 can be movably arranged in the moving seat and contact each masterbatch 50; the scraping component 45 is located in the moving seat close to the head 31; the power component 44 is fixedly mounted on the cooling groove and connected to the moving seat, and is used to drive the moving seat to move; the drive controller signal is connected to the power component 44, the compensation component 43 and the cooling and impurity-absorbing component 42.

[0020] Specifically, the extruder 30 and the cooling tank 10 cooperate to complete the masterbatch extrusion cooling process; when the extruded masterbatch 50 is deformed, the cleaning mechanism 40 is activated; the moving component 41 drives the moving seat to approach the head 31 according to the instruction of the drive controller, and the cooling and impurity absorption component 42 first cools down the impurities gathered at the outlet of the head 31 due to material mixing, heating, and uneven feeding, so as to shape them, prevent further diffusion, and clean up the impurities to ensure the quality of the discharge; at the same time, the compensation component 43 is in close contact with the masterbatch 50, and maintains the masterbatch 50 during the movement of the moving seat. Continuous, avoiding production interruption or accumulation; the scraping component 45 then scrapes the residual impurities on the surface of the head 31 to thoroughly clean the head 31; the power component 44 provides power for the movement of the moving seat in the whole process, and the driving controller fully regulates the operating parameters of the power component 44 and the working sequence of the cooling and impurity absorption component 42 and the compensation component 43 to ensure that all components work together efficiently, which can effectively solve the impurity problem at the outlet of the head 31, maintain the stability of the discharge shape and the reliability of the quality, ensure the continuous stability of the masterbatch preparation process, and improve the product qualification rate and production efficiency.

[0021] like Figure 3 , Figure 4 , Figures 6 to 10 As shown, in some examples, further, the cooling and impurity absorption component 42 includes: an air extraction hole 421, a snap-fit ​​groove 422, a collection groove 423, an air inlet hole 424 and a plurality of cooling holes 425, the air extraction hole 421 is opened in the inner wall of the movable seat, the outer end of the air extraction hole 421 is connected to an air extraction pump, and the air extraction pump signal is connected to the drive controller; the snap-fit ​​groove 422 is opened in the end of the movable seat facing the direction of the machine head 31, and matches the shape and position of the machine head 31; the impurity collection groove 423 is opened in the inner wall of the bottom end of the snap-fit ​​groove 422, and the impurity collection groove 423 is located below the outlet of the machine head 31 when docking with the machine head 31; the air inlet hole 424 is opened in the inner wall of the movable seat; one end of the plurality of cooling holes 425 is arranged corresponding to the outlet of each machine head 31, and the other ends of the plurality of cooling holes 425 are all connected to the air inlet hole 424.

[0022] Specifically, in the cooling impurity suction component 42, the buckling groove 422 plays a dual role of positioning and sealing. Its shape and position are completely matched with the head 31. When the moving seat is close to the head 31, it can be tightly buckled, so that a relatively closed and stable space is formed between the head 31 and the moving seat, ensuring the effectiveness of subsequent operations; after the scraping component 45 scrapes off the impurities at the outlet of the head 31 to form material debris, the cooling hole 425 begins to play a role; the air inlet 424 is connected to the outside air, and after the air pump is started, the cooling gas flows into the cooling hole 425 through the air inlet 424. One end of the cooling hole 425 corresponds precisely to the outlet of each head 31, and the material at the outlet of the head 31 is cooled and shaped (the internal material is still Continue to output), the material after cooling and shaping is easier to scrape and clean; at this time, the suction hole 421 generates suction under the drive of the suction pump, and the suction pump is controlled by the drive controller signal. The suction force will cause the material debris scraped after cooling and shaping to flow into the collecting groove 423 below the inner wall of the bottom end of the buckle groove 422, and then be discharged to the outside of the equipment; in this way, the cooling and suction component 42 effectively solves the problem of cleaning impurities at the outlet of the head 31, ensures the quality of the masterbatch 50 subsequently extruded by the extruder 30 is stable, and the discharge shape is standardized, which significantly improves the stability of the plastic weather-resistant masterbatch preparation process, reduces product quality defects and production interruptions caused by impurities in the head 31, thereby greatly improving the overall masterbatch preparation efficiency.

[0023] like Figure 3 , Figure 4 , Figure 5 and Figure 8 As shown, in some examples, further, the compensation component 43 includes: a driving motor 431, a transmission box 432, an export roller 433, a first gear 434, a second gear 435 and a worm 436, the driving motor 431 is fixed at the top of the moving seat; the transmission box 432 is fixed inside the moving seat, and its top is the power input end, and the power input end is connected to the output end of the driving motor 431; the export roller 433 is rotatably arranged in the inner wall of the moving seat away from the machine head 31; the first gear 434 is fixedly arranged at the end of the export roller 433, and is meshed with the output gear at the bottom of the transmission box 432; the second gear 435 is meshed and connected to the first gear 434; the worm 436 is rotatably arranged in the inner cavity in the middle of the moving seat, and is fixedly connected to the second gear 435.

[0024] In this example, specifically, the driving motor 431 is fixed at the top of the moving seat as a power source. During the cleaning process of the machine head 31, the driving motor 431 receives a signal from the driving controller to start, and the output end of the driving motor 431 is connected to the power input end of the top of the transmission box 432. The transmission box 432 converts the power of the driving motor 431 and transmits the power to the output gear at the bottom. The output gear is meshed with the first gear 434 fixed at the end of the lead-out roller 433, thereby driving the lead-out roller 433 to rotate; the lead-out roller 433 is rotatably arranged on the inner wall of the moving seat away from the machine head 31. During the rotation, a traction effect is generated on the masterbatch 50, so as to prevent the masterbatch 50 from stagnation or breakage during the cleaning process of the machine head 31, and maintain the continuity of the masterbatch 50; the first gear 434 is meshed with the second gear 435, and the second gear 435 drives the worm 436 to rotate in the inner cavity of the middle part of the moving seat, and the rotation of the worm 436 can further drive the scraping assembly 45, so that the multiple scrapers 454 in the scraping assembly 45 have the power to continuously rotate, thereby effectively removing impurities at the outlet of the machine head 31, and ensuring the stability and reliability of the preparation process of the anti-flame retardant plastic weather-resistant masterbatch.

[0025] like Figure 3 , Figure 7 , Figure 8 and Fig. 9 As shown, in some examples, further, the scraping assembly 45 includes: multiple transfer cylinders 451, multiple worm gears 452, extension cylinders 453, multiple scrapers 454, a first baffle 455 and a second baffle 456, the first baffle 455 is perpendicular to the discharge direction of the masterbatch 50, and the first baffle 455 is arranged in the moving seat; the second baffle 456 is arranged in the moving seat next to the first baffle 455, and a transmission inner cavity is formed between the second baffle 456 and the first baffle 455, and the worm 436 is located in the transmission inner cavity; one end of the multiple transfer cylinders 451 can extend into the outlet of the machine head 31, and ... The other end of the transfer cylinder 451 extends toward the other end of the moving seat, and the multiple transfer cylinders 451 are all fixed to the first baffle 455; the multiple worm gears 452 are rotatably sleeved on the outer side of the outer wall of each transfer cylinder 451 and meshed with the worm 436; the extension cylinder 453 is rotatably sleeved on the outer side of the outer wall of the transfer cylinder 451, one end of the extension cylinder 453 is fixedly connected to the worm gear 452, and the other end of the extension cylinder 453 is movable through the second baffle 456; the multiple scrapers 454 are fixed in an inclined state on the end of the extension cylinder 453 close to one end of the machine head 31 along the axial direction at equal distances.

[0026] During the cleaning process, the first baffle 455 is perpendicular to the discharge direction of the masterbatch strip 50 and is placed in the moving seat, and together with the adjacent second baffle 456, a transmission cavity is constructed to ensure that the internal transmission components are in a good working environment and avoid affecting the contact with the masterbatch material; the ends of the multiple transfer cylinders 451 can penetrate into the outlet of the machine head 31 as the moving seat moves, thereby isolating the outlet of the machine head 31 from the masterbatch strip 50, and the other end of the transfer cylinder 451 is fixed to the first baffle 455, so that the entire scraping assembly 45 is stable; when the machine head 31 needs to be cleaned, the worm 436 starts to rotate in the transmission cavity, and the worm 436 engages with the multiple worm wheels 452 sleeved on the outer wall of the extension cylinder 453, driving the worm wheels 452 to rotate; and the extension cylinder 453 is sleeved on the outer wall of the transfer cylinder 451 One end is fixedly connected to the worm gear 452, and as the worm gear 452 rotates, the extension tube 453 also rotates accordingly; a plurality of scrapers 454 are fixed to the extension tube 453 near one end of the head 31 and are inclined and evenly distributed along the axial direction. Under the rotation of the extension tube 453, the impurities at the outlet of the head 31 are efficiently scraped off. The scraping action can be carried out in the process of the moving seat approaching the head 31, gradually removing the impurities layer by layer, or after the moving seat is completely engaged with the head 31, the impurities of the head 31 can be removed, thereby ensuring that the head 31 of the extruder 30 is clean and tidy, making the masterbatch 50 have a regular shape and meet the quality standards, enhancing the stability of the preparation process of the flame retardant plastic weather-resistant masterbatch, effectively avoiding product quality defects caused by impurities, improving production efficiency and reducing production costs.

[0027] like Figure 3 , Figure 6 , Figure 7 and Fig. 9 As shown, in some examples, further, chamfers are provided on the inner walls at both ends of the transfer tube 451, and one end of the transfer tube 451 that can extend into the outlet of the machine head 31 is sharp, and a stress sensor is also provided between the transfer tube 451 and the first baffle 455. The signal output end of the stress sensor is connected to the drive controller, and the stress sensor is used to sense the abnormal state of the masterbatch 50 during operation.

[0028] In this example, the chamfers of the inner walls at both ends of the transfer cylinder 451 can reduce the friction resistance of the masterbatch 50 when it moves inside (especially when the transfer cylinder 451 enters the outlet of the head 31), making the material transmission smoother; the sharp end of the transfer cylinder 451 extending into the outlet of the head 31 facilitates more accurate segmentation of the impurity area and the output area, thereby improving the effect of scraping off impurities; the stress sensor is arranged between the transfer cylinder 451 and the first baffle 455. When the masterbatch 50 moves in the transfer cylinder 451, if an abnormal state occurs, such as deformation of the masterbatch 50 due to impurity blockage, after entering the subsequent transfer cylinder 451, the stress sensor can keenly sense this change and transmit the signal to the drive controller; after receiving the signal, the drive controller can start the cleaning working state of the outlet of the head 31 according to the preset program. Therefore, through the setting of this example, the abnormality of the masterbatch 50 in the preparation process can be discovered in time, and the continuous and stable production of the masterbatch 50 can be guaranteed through automated control means, effectively reducing the product quality problems caused by the abnormality of the masterbatch 50.

[0029] In some examples, further, a position sensor 32 is provided on the head 31 of the extruder 30 , and the position sensor 32 corresponds to the outer wall of the moving seat and is used to sense the moving position of the moving seat.

[0030] In this example, the position sensor 32 is installed on the head 31 and corresponds to the outer wall of the moving seat. Its core function is to monitor the moving position of the moving seat. In the entire plastic weather-resistant masterbatch preparation process, when the head 31 needs to be cleaned, the power component 44 drives the moving seat to move to the end of the head 31, and the position sensor 32 senses the position data of the moving seat, thereby transmitting the collected position data to the drive controller, and the drive controller determines whether the moving seat has reached a predetermined working position, such as the best position close to the head 31 for cleaning operations or a safe standby position away from the head 31. Through this precise position perception and feedback mechanism, it is ensured that the moving seat can be accurately positioned in different working stages, so that the cooling and impurity absorption component 42, the scraping component 45, etc. can efficiently clean and maintain the head 31 at the right time and position. This not only avoids problems such as incomplete cleaning or damage to the head 31 caused by the position deviation of the moving seat, but also ensures the seamless connection between the cleaning process and the extrusion production process, effectively improving the degree of automation of the entire process, thereby improving production efficiency and reducing production costs.

[0031] like Figures 8 to 10 As shown, in some examples, further, the ends of the multiple scrapers 454 close to the head 31 are located in the same plane, and all the scrapers 454 can be attached to the outer wall at the outlet of the head 31.

[0032] It can be understood that when working, when the scraping assembly 45 is started, as the worm gear 452 drives the extension tube 453 to rotate, the scraper 454 rotates synchronously; because the scraper 454 is in the same plane and fits tightly against the outer wall of the outlet of the machine head 31, it can evenly and comprehensively contact the impurities at the outlet of the machine head 31; during the rotation process, the scraper 454 effectively scrapes away the impurities attached to the outlet of the machine head 31 by virtue of its close contact and relative movement with the outlet of the machine head 31, avoiding the problem of impurity residue caused by uneven distribution or loose fitting of the scraper 454, ensuring the cleaning effect of the outlet of the machine head 31, so that the subsequently extruded masterbatch 50 will not have irregular shape or quality defects due to the impurities in the machine head 31, thereby improving the stability of the preparation process of the anti-flame retardant plastic weather-resistant masterbatch.

[0033] like Figure 4 , Figure 5 and Figure 8 As shown, in some examples, further, a plurality of export wheels are arranged on the export roller 433, each export wheel has an export groove in the middle, a rubber film is arranged on the inner wall of each export groove, and the rubber film contacts the outer wall of the bottom end of the masterbatch 50.

[0034] In this example, the multiple export wheels on the export roller 433 are responsible for pulling the masterbatch 50; the export groove in the middle of each export wheel provides a stable conveying track for the masterbatch 50, so that it is not easy to deviate during the export process and is correctly guided by force; the rubber film on the inner wall of the export groove is in contact with the outer wall of the bottom end of the masterbatch 50. On the one hand, the softness of the rubber film can increase the friction between the rubber film and the masterbatch 50, ensuring that the masterbatch 50 can be stably pulled when the machine head 31 is cleaned, maintaining the continuous production state of the masterbatch 50; on the other hand, the rubber film can play a buffering and protective role, avoiding damage to the masterbatch 50 due to hard contact during the traction process, ensuring the appearance quality and internal structural integrity of the masterbatch 50, and improving the reliability and product quality of the preparation process of flame-retardant plastic weather-resistant masterbatch.

[0035] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or electronic device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or electronic device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or electronic device including the elements.

[0036] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A process for preparing flame-retardant plastic weather-resistant masterbatch, comprising an extruder (30) and a cooling tank (10) for completing the extrusion and cooling of the masterbatch, characterized in that: When the masterbatch extruded by the extruder (30) is deformed, the head (31) of the extruder (30) is cleaned using a cleaning mechanism (40), and the masterbatch (50) before and after cleaning is ensured to be in a continuous state; Wherein, the cleaning mechanism (40) comprises a movable seat and further comprises: A movable assembly (41) capable of moving toward or away from the machine head (31), disposed on the cooling groove (10), and connected to the outer side of the movable seat; A cooling impurity suction component (42) is arranged in the movable seat and is used to cool and shape the blocked material at the outlet of the die head (31) and to clean the impurities; A compensation component (43), a portion of the compensation component (43) being movably disposed in the movable seat and in contact with each of the masterbatch strips (50); A scraping assembly (45) is located in the movable seat in a direction close to the machine head (31); A power assembly (44) is fixedly mounted on the cooling tank (10) and connected to the moving seat, and is used to drive the moving seat to move; The drive controller is signal-connected to the power component (44), the compensation component (43), and the cooling and impurity-gettering component (42).

2. The process for preparing the flame retardant plastic weather-resistant masterbatch according to claim 1, characterized in that: The cooling impurity gettering assembly (42) comprises: An air extraction hole (421) is provided in the inner wall of the movable seat, an outer end of the air extraction hole (421) is connected to an air extraction pump, and a signal of the air extraction pump is connected to the drive controller; A buckling groove (422) is provided at one end of the movable seat in a direction facing the machine head (31) and matches the shape and position of the machine head (31); A debris collecting groove (423) is provided in the inner wall of the bottom end of the locking groove (422); when the debris collecting groove (423) is docked with the machine head (31), it is located below the outlet of the machine head (31); An air inlet (424) is provided in the inner wall of the movable seat; A plurality of cooling holes (425), one end of the plurality of cooling holes (425) being arranged corresponding to an outlet of each of the machine heads (31), and the other ends of the plurality of cooling holes (425) being connected to the air inlet hole (424).

3. The process for preparing the flame retardant plastic weather-resistant masterbatch according to claim 2, characterized in that: The compensation component (43) comprises: A driving motor (431) is fixed on the top of the moving seat; A transmission box (432) is fixed inside the moving seat, and its top end is a power input end, and the power input end is connected to the output end of the driving motor (431); A lead-out roller (433) is rotatably arranged in an inner wall of a side of the movable seat away from the machine head (31); A first gear (434) is fixedly mounted on the end of the lead-out roller (433) and meshes with an output gear at the bottom end of the transmission box (432); A second gear (435) meshingly connected to the first gear (434); The worm (436) is rotatably disposed in the middle inner cavity of the movable seat and is fixedly connected to the second gear (435).

4. The process for preparing the flame retardant plastic weather-resistant masterbatch according to claim 3, characterized in that: The scraping assembly (45) comprises: A first baffle (455) is perpendicular to the discharge direction of the masterbatch (50), and the first baffle (455) is arranged in the movable seat; A second baffle (456) is disposed in the movable seat beside the first baffle (455) and forms a transmission inner cavity between the second baffle and the first baffle (455), and the worm (436) is located in the transmission inner cavity; A plurality of transfer tubes (451), one end of the plurality of transfer tubes (451) being able to extend into the outlet of the machine head (31), and the other end of the plurality of transfer tubes (451) extending toward the other end of the movable seat and being fixed to the first baffle (455); A plurality of worm wheels (452) are rotatably sleeved on the outer side of the outer wall of each transmission cylinder (451) and mesh with the worm (436); An extension tube (453) is rotatably sleeved on the outer side of the outer wall of the transmission tube (451), one end of the extension tube (453) is fixedly connected to the worm gear (452), and the other end of the extension tube (453) movably penetrates the second baffle (456); A plurality of scrapers (454) are fixed in an inclined state at equal intervals along the axial direction on an end portion of the extension tube (453) close to one end of the machine head (31).

5. The process for preparing the flame retardant plastic weather-resistant masterbatch according to claim 4, characterized in that: Chamfers are provided on the inner walls at both ends of the transfer tube (451); one end of the transfer tube (451) that can extend into the outlet of the machine head (31) is sharp; a stress sensor is also provided between the transfer tube (451) and the first baffle (455); a signal output end of the stress sensor is connected to the drive controller; the stress sensor is used to sense an abnormal state of the masterbatch (50) during operation.

6. The process for preparing the flame retardant plastic weather-resistant masterbatch according to claim 4, characterized in that: A position sensor (32) is also provided on the head (31) of the extruder (30); the position sensor (32) corresponds to the outer wall of the movable seat and is used to sense the moving position of the movable seat.

7. The process for preparing the flame retardant plastic weather-resistant masterbatch according to claim 4, characterized in that: The ends of the plurality of scrapers (454) close to the machine head (31) are located in the same plane, and all of the scrapers (454) can fit on the outer wall at the outlet of the machine head (31).

8. The process for preparing the flame retardant plastic weather-resistant masterbatch according to claim 4, characterized in that: The export roller (433) is provided with a plurality of export wheels, each of which has an export groove in the middle, and a rubber film is provided on the inner wall of each of the export grooves, the rubber film being in contact with the outer wall of the bottom end of the masterbatch (50).

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