A flame-retardant polypropylene microporous composite material preparation extrusion molding platform

Abstract

The invention relates to the technical field of flame-retardant polypropylene microporous composite material processing equipment, and discloses an extrusion molding platform for preparing flame-retardant polypropylene microporous composite material, comprising a machine base, an extrusion barrel and a heating mechanism, wherein the extrusion barrel is fixedly connected to the inside of the machine base, the heating mechanism is arranged in the inside of the extrusion barrel, the outer wall of the extrusion barrel is fixedly connected to an extrusion motor, and the output shaft of the extrusion motor is fixedly connected to an extrusion rod; when a second cleaning scraper and a first cleaning scraper rotate on the surface of a uniform extrusion filter screen, a material solution adhered to the surfaces of both sides of the uniform extrusion filter screen can be scraped off, so as to prevent the molten material from clogging the uniform extrusion filter screen, so as to enable the uniform extrusion filter screen to always maintain a uniform filtering efficiency, and to prevent the flow rate of the molten material from being reduced; and the second cleaning scraper can scrape off unmelted material particles adhered to the surface of the uniform extrusion filter screen, so as to further prevent the unmelted material particles from clogging the uniform extrusion filter screen.

Description

Technical Field

[0001] The invention relates to the technical field of flame-retardant polypropylene microporous composite material processing equipment, in particular to an extrusion molding platform for preparing flame-retardant polypropylene microporous composite material. Background Art

[0002] Flame-retardant polypropylene microporous composite material is a material with great application value. It takes polypropylene as the main matrix and introduces microporous structure through special process. The existence of these micropores gives the material many excellent properties, such as low density, good heat insulation and sound absorption performance, etc. At the same time, in order to improve its fire safety, flame retardants are specially added to make it have excellent flame retardant properties. When facing dangerous situations such as fire, this material can effectively prevent the spread of flames and reduce the losses and harm caused by fire. When extruding the flame-retardant polypropylene microporous composite material, an extrusion molding platform is required;

[0003] However, when the extrusion molding platform in the prior art melts and moves the flame-retardant polypropylene microporous composite material inside the extruder, the residence time of the material in the extruder is not sufficient. Due to the influence of factors such as the operating speed of the extruder, the material is quickly pushed to the next link before it has time to be completely heated and melted, resulting in some particles of the flame-retardant polypropylene microporous composite material in the extruder not having time to be completely transformed into a molten state, resulting in a small part of the flame-retardant polypropylene microporous composite material being in an unmelted particle state. When the flame-retardant polypropylene microporous composite material in the unmelted particle state is extruded through the extruder head, the flame-retardant polypropylene microporous composite material in the unmelted particle state will form a surface convexity after extrusion, and the surface convexity of the flame-retardant polypropylene microporous composite material after molding will affect the extrusion molding effect and extrusion molding quality of the material. Therefore, it is necessary to provide an extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material to solve the above problems. Summary of the invention

[0004] The main purpose of the present invention is to provide an extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material, which can effectively solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: an extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material, comprising a machine base, an extrusion barrel and a heating mechanism, wherein the extrusion barrel is fixedly connected to the inside of the machine base, the heating mechanism is arranged inside the extrusion barrel, the outer wall of the extrusion barrel is fixedly connected to an extrusion motor, the output shaft of the extrusion motor is fixedly connected to an extrusion rod, the end of the extrusion rod away from the extrusion motor passes through the inside of the extrusion barrel, the outer wall of the extrusion rod is fixedly connected to an extrusion spiral blade, an extrusion head is arranged at the end of the extrusion barrel away from the extrusion motor, a uniform feeding component for uniformly feeding materials and improving filtering when feeding materials is arranged inside the machine base, and a uniform extrusion component for repeatedly filtering the melted material and improving the uniformity of material extrusion is arranged inside the extrusion head.

[0006] As a further improvement of the above scheme, the uniform extrusion component includes a locking sleeve 1 rotatably connected to the outer wall of the extrusion barrel, a locking sleeve 2 is fixedly connected to the outer wall of the extrusion head, a locking screw groove is provided on the outer wall of the locking sleeve 1, a locking screw strip is fixedly connected to the side of the locking sleeve 2 close to the locking sleeve 1, and the end of the locking screw strip away from the locking sleeve 2 is threadedly connected to the inside of the locking screw groove, a fixing ring is fixedly connected to the inner wall of the extrusion head, a uniform extrusion filter is fixedly connected to the inner wall of the fixing ring, a fixing rod is rotatably connected to the inside of the uniform extrusion filter, a fixing groove is provided inside the fixing rod, and a pulling rod is fixedly connected to the inner wall of the fixing groove A stretch spring, one end of the stretch spring away from the locking sleeve is fixedly connected to a pull plate, the side of the pull plate away from the stretch spring is fixedly connected to a pull rod, the end of the pull rod away from the pull plate is symmetrically fixedly connected to four connecting plates, the four connecting plates are respectively fixedly connected to a cleaning scraper 1 and a rotating protrusion on one side close to the uniform extrusion filter, the side of the fixed ring away from the locking sleeve is symmetrically fixedly connected to four fixed protrusions, the outer side of the fixed rod is symmetrically fixedly connected to four cleaning scrapers 2, the tip positions of the cleaning scrapers 2 all hit the outer wall of the uniform extrusion filter, and the tip positions of the cleaning scraper 1 all hit the outer wall of the uniform extrusion filter.

[0007] As a further improvement of the above scheme, the uniform extrusion component also includes a plug-in slot opened at the end of the extrusion rod away from the extrusion motor, the end of the fixed rod close to the locking sleeve is fixedly connected to the plug-in rod, the end of the plug-in rod away from the fixed rod is plugged into the inside of the plug-in slot, the side of the connecting plate away from the cleaning scraper one is fixedly connected to the cleaning scraper three, the middle position of the side of the connecting plate away from the cleaning scraper one is fixedly connected to the mixing blade, and the tips of the cleaning scraper three are in contact with the inner wall of the extruder head.

[0008] As a further improvement of the above scheme, the uniform feeding assembly includes a support rod fixedly connected to the inner wall of the extrusion barrel, the top of the support rod is fixedly connected to a sealing box, the top of the base is fixedly connected to a feed pipe, the bottom end of the feed pipe is fixedly connected to the extrusion barrel, the outer wall of the extrusion rod is fixedly connected to a bevel gear 1, the inner wall of the sealing box is fixedly connected to a support plate, the interior of the support plate is rotatably connected to a rotating shaft, the bottom end of the rotating shaft is fixedly connected to a bevel gear 2, the bevel gear 2 and the bevel gear 1 are meshed with each other, the outer wall of the rotating shaft is slidably connected to a moving rod, the interior of the feed pipe is slidably connected to a sub-screen plate, the moving rod is rotatably connected to the inside of the sub-screen plate, the outer wall of the moving rod is respectively fixedly connected to a mixing rod and a material discharge scraper in a circumferential array, the tips of the bottom of the material discharge scraper are all in contact with the upper surface of the sub-screen plate, a limiting slide groove is provided inside the moving rod, the outer side of the rotating shaft is fixedly connected to a limiting convex strip, and the limiting convex strip and the rotating shaft are both slidably connected to the inside of the limiting slide groove.

[0009] As a further improvement of the above scheme, the uniform feeding assembly also includes a limit rod symmetrically fixedly connected to the inside of the sealed box, a movable plate is slidably connected to the inside of the sealed box, the movable plate is slidably connected to the outer wall of the limit rod, the bottom end of the movable rod is rotatably connected to the inside of the movable plate, the outer wall of the extrusion rod is fixedly connected to an eccentric wheel, the top of the eccentric wheel abuts against the bottom of the movable plate, the outer wall of the limit rod is sleeved with a compression spring, the two ends of the compression spring are respectively fixedly connected to the movable plate and the inner wall of the sealed box, and the movable rod is slidably connected to the inside of the sealed box.

[0010] As a further improvement of the above solution, a sealing ring is fixedly connected to the adjacent sides of the extrusion barrel and the extrusion head, and the adjacent sides of the two sealing rings are in contact with each other.

[0011] As a further improvement of the above solution, the limiting convex strip and the limiting sliding groove are both in a cross shape, and the unloading scraper is distributed in a cross shape.

[0012] As a further improvement of the above scheme, the plug-in slot and the plug-in rod are both cross-shaped, and the connecting plate, cleaning scraper one, cleaning scraper two, cleaning scraper three, mixing blade, fixed protrusion and rotating protrusion are all distributed in a cross shape.

[0013] As a further improvement of the above solution, the locking sleeve 1, the locking sleeve 2, the locking screw groove, the locking screw strip and the sealing ring are all in the shape of a ring.

[0014] As a further improvement of the above solution, the ends of the fixed protrusion and the rotating protrusion that are close to each other are both in arc shape, and the shape of the cleaning scraper three is also in arc shape.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The locking sleeve 1 and the locking sleeve 2 can achieve a certain sealing effect on the connection between the extruder barrel and the extruder head during the connection process. The threaded connection between the locking screw groove and the locking screw strip can increase the tightness of the connection between the locking sleeve 1 and the locking sleeve 2 through the self-locking effect of the thread, further reduce the gas entry while preventing material overflow, and improve the connection sealing effect between the locking sleeve 1 and the locking sleeve 2. The blocking force generated by the cross shape of the plug-in groove and the plug-in rod during the plug-in process can transmit the power of the extruder rod to the fixed rod, so that the fixed rod can transmit the power. The uniform extrusion filter and the fixing ring are arranged inside the extruder head, and the uniform extrusion filter can filter the unmelted particles in the material, so that the melted material enters the inside of the extruder head through the aperture of the uniform extrusion filter, and the filtering effect of the uniform extrusion filter can isolate the unmelted material particles in the extruder barrel. The inside of the extruder head prevents the unmelted material particles from entering the inside of the extruder head and being extruded. At the same time, the residence time of the unmelted material particles is further increased, so that the unmelted material particles are further heated by the heating mechanism in the extruder barrel, so that the unmelted material particles can be fully melted. Compared with the prior art of directly extruding the material through the extruder head, the direct extrusion will contain particles that are not completely melted, resulting in partial protrusions on the surface of the extruded material, and the direct extrusion is prone to unstable extrusion due to the accumulation of adhesion on the inner wall, and the discharge of the extruded material is uneven. These can be effectively removed by uniform extrusion filter filtering and scraping operations, making the product purer and the performance more stable and reliable. The separation of the unmelted material particles can prevent the surface protrusions when the material is extruded through the extruder head, which can fundamentally improve the extrusion molding quality of the material, reduce the unqualified rate of the material, and reduce the cost of the material to a certain extent.

[0017] 2. The rotation of the fixed rod drives the connecting plate, the first cleaning scraper, the second cleaning scraper and the rotating protrusion to rotate synchronously with the fixed rod. Since the tips of the second cleaning scraper and the first cleaning scraper are respectively in contact with the two sides of the uniform extrusion filter, when the second cleaning scraper and the first cleaning scraper rotate on the surface of the uniform extrusion filter, the material solution adhered to the surfaces of both sides of the uniform extrusion filter can be scraped off, thereby preventing the melted material from clogging the uniform extrusion filter. The uniform extrusion filter can always maintain a uniform filtering efficiency and prevent the flow rate of the melted material from being reduced. The second cleaning scraper can scrape off the unmelted material particles adhered to the surface of the uniform extrusion filter, thereby further preventing the unmelted material particles from clogging the uniform extrusion filter.

[0018] 3. When the rotation of the fixed rod drives the connecting plate, the cleaning scraper 1 and the rotating protrusion to rotate synchronously on the side inclined surface of the fixed protrusion, the rotating protrusion can be continuously rotated at the round end of the fixed protrusion through the inclined surface of the rotating protrusion and the fixed protrusion and the arc shape, and the connecting plate and the cleaning scraper 1 are synchronously moved through the protruding distance of the rotating protrusion and the fixed protrusion, and the pulling plate, the pulling rod, the connecting plate, the cleaning scraper 1 and the rotating protrusion are pulled to reset through the tension of the stretching spring, and the cleaning scraper 1 and the connecting plate are reciprocated on the surface of the uniform extrusion filter screen to resist and separate, so that the cleaning scraper 1 and the connecting plate can produce a vibration effect, which can be used to melt the material adhered to the surface of the uniform extrusion filter screen. While scraping, the vibration effect can further vibrate and remove the molten material adhering to the surface of the uniform extrusion filter, which can further assist in removing the molten material adhering to the surface of the uniform extrusion filter. When the cleaning scraper three and the mixing blade follow the synchronous rotation of the connecting plate, the shape of the cleaning scraper three is the same as the shape of the inner wall of the extrusion head, so that the molten material adhering to the inner wall of the extrusion head can be scraped off by the cleaning scraper three, and the mixing blade follows the rotation of the connecting plate in the molten material inside the extrusion head. The filtered molten material can be further mixed by the mixing blade, which further improves the uniformity of the molten material discharge when the material is extruded.

[0019] 4. The material placed in the feed pipe can be initially filtered through the sub-screen plate in the uniform feeding assembly. Impurities larger than the material particles can be separated out through the sub-screen plate. At the same time, the agglomerated material can be separated through the sub-screen plate, so that part of the material and the non-agglomerated material can fall into the inside of the extruder through the aperture of the sub-screen plate, which can keep the feed of the material pure. Pure materials can ensure that the extruded products have better uniformity and consistency. When the material is on the surface of the sub-screen plate, the blocking force generated by the limit slide and limit convex strip between the rotating shaft and the moving rod keeps the moving rod continuously. Rotate on the surface of the sub-screen plate to make the mixing rod on the outer wall of the moving rod and the feeding scraper rotate synchronously. The rotation of multiple mixing rods can mix the unfiltered materials and perform preliminary preparation of the agglomerated materials in the materials. The feeding scraper can scrape off the materials blocked on the surface of the sub-screen plate, which can improve the filtering effect and crush and break up the agglomerated materials accumulated on the surface of the sub-screen plate again, effectively preventing the agglomerated materials from entering the extrusion barrel, and making the materials after breaking up be heated more evenly, which is beneficial for all materials to fully reach the melting temperature, thereby ensuring the uniformity of the quality of the extrudate.

[0020] 5. When the eccentric wheel rotates continuously, the ends of the eccentric wheel that are farther and closer to the extrusion rod rotate respectively under the moving plate, and the eccentric wheel pushes the moving plate and the internal moving rod to move up and down continuously, and the up and down movement generates a vibration effect, and the vibration effect can push the sub-screen plate, mixing rod, sub-screen plate and unloading scraper to move up and down synchronously, and the vibration effect of the up and down movement can effectively break the stratification or uneven distribution state between the materials, so that different flame retardants, polypropylene and other materials are fully mixed, ensuring the consistency of the performance of each part of the extruded product, preventing the inconsistency of the proportion of local material components, and avoiding the resulting local performance defects of the extruded product. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a cross-sectional view of the overall internal structure of the present invention;

[0024] Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement in the middle;

[0025] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0026] Figure 5 It is a schematic diagram of the uniform extrusion filter structure of the present invention;

[0027] Figure 6 It is a schematic diagram of the side structure of the uniform extrusion molding component of the present invention;

[0028] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at C in the middle;

[0029] Figure 8 It is a schematic diagram of the structure of the uniform feeding component of the present invention.

[0030] In the figure: 1. Machine base; 2. Extrusion barrel; 3. Extrusion head; 4. Extrusion rod; 5. Extrusion spiral blade; 6. Extrusion motor;

[0031] 7. Uniform feeding assembly: 71. Moving plate; 72. Support rod; 73. Sealing box; 74. Bevel gear 1; 75. Support plate; 76. Rotating shaft; 77. Bevel gear 2; 78. Moving rod; 79. Screen plate; 710. Mixing rod; 711. Unloading scraper; 712. Eccentric wheel; 713. Limit rod;

[0032] 714, compression spring; 715, limiting slide groove; 716, limiting convex strip; 8, feed pipe;

[0033] 9. Uniform extrusion molding components: 91. Locking sleeve 1; 92. Locking sleeve 2; 93. Locking screw groove; 94. Locking screw strip; 95. Sealing ring; 96. Plug-in groove; 97. Plug-in rod; 98. Uniform extrusion filter; 99. Fixing rod; 910. Fixing groove; 911. Tension spring; 912. Pull plate;

[0034] 913. Pull rod; 914. Connecting plate; 915. Cleaning scraper 1; 916. Cleaning scraper 2; 917. Fixing ring; 918. Fixing protrusion; 919. Cleaning scraper 3; 920. Mixing blade; 921. Rotating protrusion. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 8 As shown, the present invention provides an embodiment: an extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material, comprising a machine base 1, an extrusion barrel 2 and a heating mechanism, the extrusion barrel 2 is fixedly connected to the inside of the machine base 1, the heating mechanism is arranged inside the extrusion barrel 2, the outer wall of the extrusion barrel 2 is fixedly connected to an extrusion motor 6, the output shaft of the extrusion motor 6 is fixedly connected to an extrusion rod 4, the end of the extrusion rod 4 away from the extrusion motor 6 passes through the inside of the extrusion barrel 2, the outer wall of the extrusion rod 4 is fixedly connected to an extrusion spiral blade 5, an extrusion head 3 is arranged at the end of the extrusion barrel 2 away from the extrusion motor 6, a uniform feeding component 7 for uniformly feeding materials and improving the filtering of materials during feeding is arranged inside the machine base 1, and a uniform extrusion component 9 for repeatedly filtering the melted material and improving the uniformity of material extrusion is arranged inside the extrusion head 3;

[0037] The uniform extrusion assembly 9 includes a locking sleeve 91 rotatably connected to the outer wall of the extrusion barrel 2, a locking sleeve 92 is fixedly connected to the outer wall of the extrusion head 3, a locking screw groove 93 is provided on the outer wall of the locking sleeve 91, a locking screw strip 94 is fixedly connected to the side of the locking sleeve 92 close to the locking sleeve 91, and the end of the locking screw strip 94 away from the locking sleeve 92 is threadedly connected to the inside of the locking screw groove 93, a fixing ring 917 is fixedly connected to the inner wall of the extrusion head 3, a uniform extrusion filter 98 is fixedly connected to the inner wall of the fixing ring 917, a fixing rod 99 is rotatably connected to the inside of the uniform extrusion filter 98, a fixing groove 910 is provided inside the fixing rod 99, a tension spring 911 is fixedly connected to the inner wall of the fixing groove 910, and the tension spring 911 is away from the locking A pull plate 912 is fixedly connected to one end of the sleeve 91, and a pull rod 913 is fixedly connected to the side of the pull plate 912 away from the tension spring 911, and four connecting plates 914 are symmetrically fixedly connected to the end of the pull rod 913 away from the pull plate 912, and a cleaning scraper 915 and a rotating protrusion 921 are fixedly connected to the side of the four connecting plates 914 close to the uniform extrusion filter 98, respectively, and four fixed protrusions 918 are symmetrically fixedly connected to the side of the fixing ring 917 away from the locking sleeve 91, and four cleaning scrapers 916 are symmetrically fixedly connected to the outer side of the fixing rod 99, and the tip positions of the cleaning scrapers 916 all abut against the outer wall of the uniform extrusion filter 98, and the tip positions of the cleaning scrapers 915 all abut against the outer wall of the uniform extrusion filter 98;

[0038] The uniform extrusion assembly 9 also includes a plug-in slot 96 provided at the end of the extrusion rod 4 away from the extrusion motor 6, a plug-in rod 97 is fixedly connected to the end of the fixed rod 99 close to the locking sleeve 1 91, and the end of the plug-in rod 97 away from the fixed rod 99 is plugged into the inside of the plug-in slot 96, a cleaning scraper 3 919 is fixedly connected to the side of the connecting plate 914 away from the cleaning scraper 1 915, a mixing blade 920 is fixedly connected to the middle position of the side of the connecting plate 914 away from the cleaning scraper 1 915, and the tip of the cleaning scraper 3 919 abuts against the inner wall of the extruder head 3;

[0039] A sealing ring 95 is fixedly connected to the side where the extrusion barrel 2 and the extrusion head 3 are close to each other, and the sides where the two sealing rings 95 are close to each other are in conflict with each other;

[0040] Specifically, by repeatedly stretching and resetting the cleaning scraper 915 in the uniform extrusion component 9, the cleaning scraper 915 can generate a vibration force, and the vibration force of the cleaning scraper 915 can continuously rotate and hit the surface of the uniform extrusion filter 98, so that while scraping off the material adhering to the surface of the uniform extrusion filter 98, the material inside the uniform extrusion filter 98 can be vibrated and dropped off by the vibration force, which can further quickly drop and scrape off the material on the surface and inside of the uniform extrusion filter 98. The setting of the uniform extrusion filter 98 can separate the unmelted granular material in the extrusion barrel 2 in the extrusion barrel 2, and prevent the unmelted material particles from entering the interior of the extrusion head 3, thereby fundamentally preventing the situation where there are bulges on the surface of the material during extrusion molding, and fundamentally improving the extrusion molding quality of the material;

[0041] When the connecting plate 914 rotates, the cleaning scraper 3 919 and the mixing blade 920 fixedly connected thereto are driven to rotate synchronously. The tip of the cleaning scraper 3 919 is in contact with the inner wall of the extruder head 3, and the shape of the cleaning scraper 3 919 matches the shape of the inner wall of the extruder head 3, so that the material adhering to the inner wall of the extruder head 3 can be further scraped off. The mixing blade 920 rotates in the filtered material, so that the filtered material can be further mixed evenly, and the uniformity of the material can be further improved before the material is extruded and molded. The accumulation of adhesions can easily lead to problems such as uneven material extrusion and pressure fluctuations. Scraping off the materials adhering to the inner wall of the extruder head 3 can prevent the accumulation of these materials from affecting the shape and size of the extrusion channel, keeping the extrusion process stable, and avoiding the adverse effects of long-term adhesion of the material on the extruder head 3, such as erosion, reducing the damage of the adhesions to the extruder head 3, reducing the risk of wear and failure, and further improving the extrusion molding quality of the material.

[0042] The uniform feeding assembly 7 includes a support rod 72 fixedly connected to the inner wall of the extrusion barrel 2, the top of the support rod 72 is fixedly connected to a sealing box 73, the top of the base 1 is fixedly connected to a feed pipe 8, the bottom end of the feed pipe 8 is fixedly connected to the extrusion barrel 2, the outer wall of the extrusion rod 4 is fixedly connected to a bevel gear 1 74, the inner wall of the sealing box 73 is fixedly connected to a support plate 75, the inner rotation of the support plate 75 is connected to a rotating shaft 76, the bottom end of the rotating shaft 76 is fixedly connected to a bevel gear 2 77, the bevel gear 2 77 and the bevel gear 1 74 are meshed with each other, and the outer wall of the rotating shaft 76 is slidable. The movable rod 78 is movably connected, and the inner part of the feed pipe 8 is slidably connected with the sub-screen plate 79. The movable rod 78 is rotatably connected to the inner part of the sub-screen plate 79. The outer wall of the movable rod 78 is respectively fixedly connected with the mixing rods 710 and the material scraper 711 in a circumferential array. The tip of the bottom of the material scraper 711 is in contact with the upper surface of the sub-screen plate 79. A limited sliding groove 715 is provided inside the movable rod 78. The outer side of the rotating shaft 76 is fixedly connected with a limited convex strip 716. The limited convex strip 716 and the rotating shaft 76 are both slidably connected to the inner part of the limited sliding groove 715.

[0043] The uniform feeding assembly 7 also includes a limiting rod 713 symmetrically fixedly connected to the inside of the sealing box 73, a moving plate 71 is slidably connected to the inside of the sealing box 73, the moving plate 71 is slidably connected to the outer wall of the limiting rod 713, the bottom end of the moving rod 78 is rotatably connected to the inside of the moving plate 71, an eccentric wheel 712 is fixedly connected to the outer wall of the extrusion rod 4, the top of the eccentric wheel 712 abuts against the bottom of the moving plate 71, the outer wall of the limiting rod 713 is sleeved with a compression spring 714, the two ends of the compression spring 714 are respectively fixedly connected to the moving plate 71 and the inner wall of the sealing box 73, and the moving rod 78 is slidably connected to the inside of the sealing box 73;

[0044] Specifically, the rotation of the moving rod 78 in the uniform feeding assembly 7 drives the mixing rod 710 and the unloading scraper 711 fixedly connected thereto to rotate synchronously, and when the unloading scraper 711 rotates on the surface of the sub-screen plate 79, the agglomerated materials blocked on the surface of the sub-screen plate 79 can be scraped off, which can prevent the agglomerated materials from blocking the sub-screen plate 79. At the same time, the unloading scraper 711 can crush and break up the agglomerated materials on the surface of the sub-screen plate 79, and the sub-screen plate 79 can separate the agglomerated materials and impurities larger than the material particles, so that the unclumped materials and the filtered materials can pass through the sub-screen plate 79 to enter the interior of the extruder 2 more evenly, and the mixing rod 710 can continuously rotate in the material, and the mixing rod 710 has the effect of breaking up some of the clumped materials again, and the vibration force generated by the continuous rotation and up and down sliding of the sub-screen plate 79, the feed scraper 711, the moving rod 78, and the mixing rod 710 can more effectively break up the agglomeration state of the material, so that various additives such as flame retardants are fully and evenly mixed with the polypropylene matrix, ensuring that the flame retardant and other properties are uniformly distributed throughout the material, helping to form a more uniform microporous structure, improving the thermal insulation, sound insulation and other properties of the material, avoiding unstable performance due to local structural differences, preventing local aggregation or separation of certain components, and ensuring the uniformity of the overall performance of the material. Uniform feeding makes the flow of the melt during extrusion more stable, reducing pressure fluctuations and extrusion defects.

[0045] Reference Figure 2 , Figure 3 and Figure 8 As shown, the limiting convex strip 716 and the limiting sliding groove 715 are both in the shape of a cross, and the unloading scraper 711 is distributed in a cross shape;

[0046] Reference Figure 2 and Figure 6 As shown, the plug slot 96 and the plug rod 97 are both in a cross shape, and the connecting plate 914, the cleaning scraper 1 915, the cleaning scraper 2 916, the cleaning scraper 3 919, the mixing blade 920, the fixed protrusion 918 and the rotating protrusion 921 are all distributed in a cross shape;

[0047] Reference Figure 4 , Figure 5 and Figure 6 As shown, the shapes of the locking sleeve 1 91, the locking sleeve 2 92, the locking screw groove 93, the locking screw strip 94 and the sealing ring 95 are all ring-shaped;

[0048] Reference Figure 5 , Figure 6 and Figure 7 As shown, the ends of the fixed protrusion 918 and the rotating protrusion 921 that are close to each other are both in arc shape, and the shape of the cleaning scraper 919 is also in arc shape;

[0049] In combination with the above preferred embodiments, the working principle of the present invention is as follows:

[0050] In the initial state, the eccentric wheel 712 is in a conflicting state with the movable plate 71, the compression spring 714 is in an uncompressed state, the locking sleeve 1 91 and the locking sleeve 2 92 are not connected, the locking screw groove 93 and the locking screw strip 94 are not connected, the plug-in groove 96 and the plug-in rod 97 are not plugged in, the tension spring 911 is in an unstretched state, the rotating protrusion 921 and the fixed protrusion 918 are not in a conflicting state, the cleaning scraper three 919 is in a conflicting state with the inner wall of the extrusion head 3, and the cleaning scraper one 915 is in a conflicting state with the uniform extrusion filter 98.

[0051] When working:

[0052] When the staff inserts one end of the plug rod 97 into the plug groove 96, the side of the locking sleeve 2 92 and the locking sleeve 1 91 close to each other is in a state of conflict, and then the staff manually rotates the locking sleeve 1 91, so that the locking screw strip 94 is threadedly connected to the inside of the locking screw groove 93 under the action of the thread, and the locking sleeve 1 91 and the locking sleeve 2 92 can be tightly locked through the self-locking effect of the thread, and at the same time, the extrusion head 3 and the extrusion barrel 2 can be tightly conflicted with each other;

[0053] When the staff puts the material inside the feed pipe 8, the staff electrically controls the extrusion motor 6 to start through the controller, and the extrusion motor 6 drives the extrusion rod 4 fixedly connected thereto to rotate. The rotation of the extrusion rod 4 synchronously drives the fixed rod 99 to rotate through the blocking force generated by the cross shape of the plug-in slot 96 and the plug-in rod 97. At the same time, the rotation of the extrusion rod 4 drives the bevel gear 1 74 and the eccentric wheel 712 fixedly connected thereto to rotate synchronously. The rotation of the bevel gear 1 74 drives the bevel gear 2 77 meshing therewith to rotate synchronously. The rotation of the bevel gear 2 77 drives the rotating shaft 76 fixedly connected thereto to rotate synchronously. The rotation of the rotating shaft 76 drives the sliding moving rod 78 to rotate synchronously through the blocking force generated by the cross shape of the limiting slide groove 715 and the limiting convex strip 716, and the moving The rotation of the rod 78 drives the mixing rod 710 and the material discharging scraper 711 fixedly connected thereto to rotate synchronously. When the material discharging scraper 711 rotates on the surface of the sub-screen plate 79, the agglomerated materials blocked on the surface of the sub-screen plate 79 can be scraped off, which can prevent the agglomerated materials from blocking the sub-screen plate 79. At the same time, the agglomerated materials on the surface of the sub-screen plate 79 can be crushed and dispersed by the material discharging scraper 711, and the agglomerated materials and impurities larger than the material particles can be separated by the sub-screen plate 79, so that the non-agglomerated materials and the filtered materials can pass through the sub-screen plate 79 more evenly into the interior of the extruder 2. The mixing rod 710 continuously rotates in the material, so that the partially agglomerated materials can be dispersed again by the mixing rod 710.

[0054] When the cam 712 is at a position far from the center of the extruder rod 4, the movable plate 71 is pushed to slide on the surface of the limit rod 713 by the eccentric distance of the cam 712, and the upward sliding of the movable plate 71 drives the movable rod 78 connected to its rotation to slide upward synchronously, and the upward sliding of the movable plate 71 drives the sub-screen plate 79 connected to its rotation, the mixing rod 710 fixedly connected to it and the scraper 711 to slide upward in the feed pipe 8 synchronously, and the compression spring 714 is in a compressed state at this time, and when the cam 712 is at a position near the center of the extruder rod 4, the movable plate 71 is pushed to slide on the outer wall of the limit rod 713 by the compression rebound force of the compression spring 714 itself, and the downward sliding of the limit rod 713 drives the movable rod 78 connected to its rotation to slide downward synchronously, and the downward sliding of the movable rod 78 drives the sub-screen plate 79 connected to its rotation, the mixing rod 710 fixedly connected to it and the scraper 711 to slide upward in the feed pipe 8 The material scraper 711 slides down in the feed pipe 8 synchronously, and the vibration force generated by the up and down sliding of the sub-screen plate 79, the material scraper 711, the moving rod 78, and the mixing rod 710 while continuously rotating, the up and down vibration and rotational force can more effectively break the agglomeration state of the material, so that various additives such as flame retardants are fully mixed with the polypropylene matrix, ensuring that the flame retardant and other properties are uniformly distributed throughout the material, which helps to form a more uniform microporous structure, improve the thermal insulation, sound insulation and other properties of the material, avoid local structural differences causing unstable performance, prevent local aggregation or separation of certain components, and ensure the uniformity of the overall performance of the material. Uniform feeding makes the flow of the melt during extrusion more stable, reduces pressure fluctuations and extrusion defects, and the sub-screen plate 79 can intercept impurities and larger particles that are not fully mixed, making the extruded material purer, reducing quality problems caused by impurities, such as bubbles, defects, etc., and improving the product's pass rate and reliability;

[0055] When the extrusion rod 4 rotates, the blocking force generated by the cross shape of the plug slot 96 and the plug rod 97 drives the fixed rod 99 to rotate synchronously. The rotation of the fixed rod 99 drives the internal tension spring 911, the pull plate 912, the pull rod 913, the connecting plate 914, the cleaning scraper 1 915 and the cleaning scraper 2 916 to rotate synchronously. At this time, the tips of the cleaning scraper 1 915 and the cleaning scraper 2 916 respectively contact the two sides of the uniform extrusion filter 98. The cleaning scraper 1 915 and the cleaning scraper 2 916 can scrape the material on both sides of the uniform extrusion filter 98 to prevent the material from clogging the uniform extrusion filter 98, thereby effectively improving the extrusion efficiency of the material. The connecting plate 914 drives the cleaning scraper 1 91 5 and the rotating protrusion 921 rotate synchronously, and when the circular end of the rotating protrusion 921 rotates at the circular end of the fixed protrusion 918, the protruding distance between the rotating protrusion 921 and the fixed protrusion 918 can push the cleaning scraper 915 and the connecting plate 914 fixedly connected thereto to move, so that the tip of the cleaning scraper 915 is separated from the uniform extrusion filter 98, and the movement of the connecting plate 914 drives the pull rod 913 fixedly connected thereto to be pulled out from the inside of the fixed rod 99, and the pulling of the pull rod 913 drives the pull plate 912 and the tension spring 911 fixedly connected thereto to be pulled out synchronously, and at this time the tension spring 911 is in a stretched state, and the connecting plate 914 drives the cleaning scraper 915 and the rotating protrusion fixed thereto to be pulled out synchronously, and the tension spring 911 is in a stretched state at this time, and the cleaning scraper 915 and the rotating protrusion fixed thereto to be pulled out synchronously. 921 continues to rotate, so that the rotating protrusion 921 is separated from the round end of the fixed protrusion 918. At this time, when the tension spring 911 has no protruding thrust, the tension spring 911 drives the pull plate 912 fixedly connected to it to slide inside the fixed rod 99 through its own rebound tension force. The sliding of the pull plate 912 drives the pull rod 913 fixedly connected to it to reset synchronously. The reset of the pull rod 913 drives the connecting plate 914 and the cleaning scraper 915 fixedly connected to it to reset synchronously. The reset of the cleaning scraper 915 drives the rotating protrusion 921 fixedly connected to it to reset, so that the tip of the cleaning scraper 915 is reset to contact the surface of the uniform extrusion filter 98, and the cleaning scraper 915 is repeatedly stretched and reset. The cleaning scraper 915 can generate a vibration force, and the vibration force of the cleaning scraper 915 can continuously rotate and strike the surface of the uniform extrusion filter 98, so that while scraping off the material adhering to the surface of the uniform extrusion filter 98, the material inside the uniform extrusion filter 98 can be vibrated and dropped off by the vibration force, which can further quickly drop and scrape off the material on the surface and inside of the uniform extrusion filter 98. The setting of the uniform extrusion filter 98 can separate the unmelted granular material in the extrusion barrel 2 in the extrusion barrel 2, and prevent the unmelted material particles from entering the interior of the extrusion head 3, thereby fundamentally preventing the situation where the surface of the material is bulged during extrusion molding, and fundamentally improving the extrusion molding quality of the material;

[0056] When the connecting plate 914 rotates, the cleaning scraper 3 919 and the mixing blade 920 fixedly connected thereto are driven to rotate synchronously. The tip of the cleaning scraper 3 919 is in contact with the inner wall of the extruder head 3, and the shape of the cleaning scraper 3 919 matches the shape of the inner wall of the extruder head 3, so that the material adhering to the inner wall of the extruder head 3 can be further scraped off. The mixing blade 920 rotates in the filtered material, so that the filtered material can be further mixed evenly, and the uniformity of the material can be further improved before the material is extruded and molded. The accumulation of adhesions can easily lead to problems such as uneven material extrusion and pressure fluctuations. Scraping off the materials adhering to the inner wall of the extruder head 3 can prevent the accumulation of these materials from affecting the shape and size of the extrusion channel, keeping the extrusion process stable, and avoiding the adverse effects of long-term adhesion of the material on the extruder head 3, such as erosion, reducing the damage of the adhesions to the extruder head 3, reducing the risk of wear and failure, and further improving the extrusion molding quality of the material.

[0057] It should be noted that, 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 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 a process, method, article or 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, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material, comprising a machine base (1), an extrusion barrel (2) and a heating mechanism, wherein the extrusion barrel (2) is fixedly connected to the inside of the machine base (1), and the heating mechanism is arranged inside the extrusion barrel (2), characterized in that: The outer wall of the extrusion barrel (2) is fixedly connected to an extrusion motor (6), the output shaft of the extrusion motor (6) is fixedly connected to an extrusion rod (4), the end of the extrusion rod (4) away from the extrusion motor (6) penetrates the interior of the extrusion barrel (2), the outer wall of the extrusion rod (4) is fixedly connected to an extrusion spiral blade (5), the end of the extrusion barrel (2) away from the extrusion motor (6) is provided with an extrusion head (3), the interior of the base (1) is provided with a uniform feeding component (7) for uniformly feeding the material and improving the filtering of the material during feeding, and the interior of the extrusion head (3) is provided with a uniform extrusion component (9) for repeatedly filtering the melted material and improving the uniformity of the material extrusion; The uniform extrusion assembly (9) comprises a locking sleeve (91) rotatably connected to the outer wall of the extrusion barrel (2); the outer wall of the extrusion head (3) is fixedly connected to a locking sleeve (92); the outer wall of the locking sleeve (91) is provided with a locking screw groove (93); the side of the locking sleeve (92) close to the locking sleeve (91) is fixedly connected to a locking screw strip (94); the end of the locking screw strip (94) away from the locking sleeve (92) is threadedly connected to the inside of the locking screw groove (93); the inner wall of the extrusion head (3) is fixedly connected to a fixing ring (917); the inner wall of the fixing ring (917) is fixedly connected to a uniform extrusion filter (98); the inside of the uniform extrusion filter (98) is rotatably connected to a fixing rod (99); the inside of the fixing rod (99) is provided with a fixing groove (910); the inner wall of the fixing groove (910) is fixedly connected to a tension spring (911); the tension spring (911) is fixedly connected to the inner wall of the fixing ring (917); 11) A pull plate (912) is fixedly connected to one end away from the locking sleeve (91), and a pull rod (913) is fixedly connected to one side of the pull plate (912) away from the tension spring (911), and four connecting plates (914) are symmetrically fixedly connected to one end of the pull rod (913) away from the pull plate (912), and a cleaning scraper (915) and a rotating protrusion (921) are respectively fixedly connected to one side of the four connecting plates (914) close to the uniform extrusion filter (98), and four fixed protrusions (918) are symmetrically fixedly connected to one side of the fixing ring (917) away from the locking sleeve (91), and four cleaning scrapers (916) are symmetrically fixedly connected to the outer side of the fixing rod (99), and the tip of each cleaning scraper (916) abuts against the outer wall of the uniform extrusion filter (98), and the tip of each cleaning scraper (915) abuts against the outer wall of the uniform extrusion filter (98); The uniform extrusion assembly (9) further comprises a plug-in slot (96) provided at the end of the extrusion rod (4) away from the extrusion motor (6); the end of the fixed rod (99) close to the locking sleeve (91) is fixedly connected to the plug-in rod (97); the end of the plug-in rod (97) away from the fixed rod (99) is plugged into the inside of the plug-in slot (96); the side of the connecting plate (914) away from the cleaning scraper (915) is fixedly connected to the cleaning scraper (919) three; the middle position of the side of the connecting plate (914) away from the cleaning scraper (915) is fixedly connected to the mixing blade (920); the tip of the cleaning scraper (919) abuts against the inner wall of the extruder head (3).

2. The extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material according to claim 1, characterized in that: The uniform feeding assembly (7) comprises a support rod (72) fixedly connected to the inner wall of the extrusion barrel (2), the top end of the support rod (72) is fixedly connected to a sealing box (73), the top end of the machine base (1) is fixedly connected to a feed pipe (8), the bottom end of the feed pipe (8) is fixedly connected to the extrusion barrel (2), the outer wall of the extrusion rod (4) is fixedly connected to a bevel gear 1 (74), the inner wall of the sealing box (73) is fixedly connected to a support plate (75), the inner part of the support plate (75) is rotatably connected to a rotating shaft (76), the bottom end of the rotating shaft (76) is fixedly connected to a bevel gear 2 (77), the bevel gear 2 (77) and the bevel gear 1 (74) are meshed with each other, and the rotating shaft (7 6), the outer wall of the feed pipe (8) is slidably connected to a moving rod (78), the inner part of the feed pipe (8) is slidably connected to a sub-screen plate (79), the moving rod (78) is rotatably connected to the inner part of the sub-screen plate (79), the outer wall of the moving rod (78) is respectively fixedly connected to a mixing rod (710) and a material discharge scraper (711) in a circular array, the tip of the bottom of the material discharge scraper (711) is in contact with the upper surface of the sub-screen plate (79), a limiting slide groove (715) is provided inside the moving rod (78), the outer side of the rotating shaft (76) is fixedly connected to a limiting convex strip (716), and the limiting convex strip (716) and the rotating shaft (76) are both slidably connected to the inner part of the limiting slide groove (715).

3. The extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material according to claim 2, characterized in that: The uniform feeding assembly (7) also includes a limiting rod (713) symmetrically fixedly connected to the inside of the sealing box (73); the inside of the sealing box (73) is slidably connected to a movable plate (71); the movable plate (71) is slidably connected to the outer wall of the limiting rod (713); the bottom end of the movable rod (78) is rotatably connected to the inside of the movable plate (71); the outer wall of the extrusion rod (4) is fixedly connected to an eccentric wheel (712); the top end of the eccentric wheel (712) abuts against the bottom of the movable plate (71); the outer wall of the limiting rod (713) is sleeved with a compression spring (714); the two ends of the compression spring (714) are respectively fixedly connected to the movable plate (71) and the inner wall of the sealing box (73); the movable rod (78) is slidably connected to the inside of the sealing box (73).

4. The extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material according to claim 1, characterized in that: A sealing ring (95) is fixedly connected to each of the adjacent sides of the extrusion cylinder (2) and the extrusion head (3), and the adjacent sides of the two sealing rings (95) are in contact with each other.

5. The extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material according to claim 2, characterized in that: The limiting convex strip (716) and the limiting sliding groove (715) are both in the shape of a cross, and the material removal scraper (711) is distributed in the shape of a cross.

6. The extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material according to claim 1, characterized in that: The plug-in slot (96) and the plug-in rod (97) are both in a cross shape, and the connecting plate (914), the first cleaning scraper (915), the second cleaning scraper (916), the third cleaning scraper (919), the mixing blade (920), the fixed protrusion (918) and the rotating protrusion (921) are all distributed in a cross shape.

7. The extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material according to claim 4, characterized in that: The locking sleeve 1 (91), the locking sleeve 2 (92), the locking screw groove (93), the locking screw strip (94) and the sealing ring (95) are all in the shape of a ring.

8. The extrusion molding platform for preparing a flame-retardant polypropylene microporous composite material according to claim 6, characterized in that: The ends of the fixed protrusion (918) and the rotating protrusion (921) that are close to each other are both in an arc shape, and the shape of the cleaning scraper three (919) is also in an arc shape.

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