A molten plastic filtration assembly and method of filtration thereof

Abstract

The application relates to the field of injection molding and discloses a molten plastic filtering assembly, which comprises a rack, a filtering assembly and a recycling assembly arranged on the rack, an input pipeline connected to a molten plastic input end of the filtering assembly, an impurity output end of the filtering assembly connected with an impurity input end of the recycling assembly, and a connecting pipeline arranged between a molten plastic output end of the filtering assembly and a molten plastic output end of the recycling assembly to realize connection, wherein an output pipeline is arranged on the connecting pipeline; the filtering assembly comprises an outer cylinder body, a side support arranged at one open end of the outer cylinder body, an installation ring sleeved at the other open end, a filtering sleeve arranged between the installation ring and the side support, a sleeve hole arranged on an end face of the side support, a connecting shaft sleeved in the sleeve hole, a circular disc arranged at one end of the connecting shaft and extending into the filtering sleeve, a scraper shell arranged on one side of the circular disc, an open side of the scraper shell facing the inner wall of the filtering sleeve, a screw arranged in the scraper shell, and the outer surface of the screw close to the inner wall of the filtering sleeve.

Description

Technical Field

[0001] This invention relates to the field of injection molding, specifically to the field of molten plastic filtration, and particularly to a molten plastic filtration assembly and its filtration method. Background Technology

[0002] Molten plastic filtration is a core step in ensuring product quality during plastic extrusion, recycling, and granulation. Its main purpose is to remove impurities such as gel, unmelted material, carbides, metal fragments, paper scraps, wood chips, and sand from the melt.

[0003] The screenless filter head is one of the existing molten plastic filtration solutions. Simply put, traditional screen filters are prone to clogging after a period of use, requiring shutdown and screen replacement. The screenless filter head, however, can achieve automatic slag discharge and can operate continuously for days or even weeks. Furthermore, the core of the screenless filter head is a highly wear-resistant alloy filter sleeve with numerous fine micropores, coupled with a constantly rotating scraper. Molten plastic flows out from the micropores of the filter sleeve, while impurities larger than the pore size are trapped inside. Simultaneously, the rotating scraper scrapes the impurities off the inner wall of the filter sleeve and pushes them into a nearby impurity storage chamber. When the impurity storage chamber is full, the system automatically opens the valve to discharge the impurities.

[0004] While screenless slag removal can achieve automatic slag discharge and extend working time, it still has some shortcomings. Specifically: on the one hand, some molten plastic will be pushed into the impurity storage chamber along with impurities, resulting in serious loss of good material; on the other hand, molten plastic is equivalent to a viscous liquid, and a certain pressure is required to push it through the micropores of the filter sleeve during filtration. In other words, the environmental pressure inside the filter sleeve is relatively high. Under the influence of this pressure, some impurities are easily squeezed into the micropores. These impurities are partially or entirely located in the micropores and are difficult to be scraped off by the scraper. Even if the scraper has a strong scraping force and scrapes off these impurities, the micropores are easily damaged by the impurities during the scraping process, and the filter sleeve is prone to damage over time.

[0005] Based on the above, the present invention proposes a molten plastic filter assembly and its filtration method. Summary of the Invention

[0006] To address the problems mentioned in the background above, the present invention provides a molten plastic filter assembly and a filtration method thereof.

[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows.

[0008] A molten plastic filter assembly includes a frame on which a filter assembly and a recovery assembly are mounted. An input pipe is connected to the molten plastic input end of the filter assembly. The impurity output end of the filter assembly is connected to the impurity input end of the recovery assembly, and a valve three is provided at the connection. The molten plastic output end of the filter assembly and the molten plastic output end of the recovery assembly are connected by a connecting pipe, a valve two and an output pipe are provided on the connecting pipe, and a valve one is provided at the connection between the output pipe and the connecting pipe.

[0009] The filter assembly includes an outer cylinder and a side sleeve. A side support is provided at one open end of the outer cylinder, and an installation ring is fitted at the other open end. A filter sleeve is provided between the installation ring and the side support.

[0010] The end face of the side support is provided with a sleeve hole, and a connecting shaft is fitted inside the sleeve hole. One end of the connecting shaft extends into the filter sleeve and is provided with an annular disk on the outside. A scraper shell is provided on the side of the annular disk away from the side support. The extension direction of the scraper shell is parallel to the axis of the filter sleeve. The scraper shell is open on the side facing the inner wall of the filter sleeve. An auger is provided inside the scraper shell, and the outer surface of the auger is close to the inner wall of the filter sleeve.

[0011] As a further improvement and optimization of the present invention, an annular region is formed between the outer wall of the filter sleeve and the inner wall of the outer cylinder, and a connector is provided on the outer surface of the side support. The end of the connector is connected to the connecting pipe, and the connector and the annular region are connected by a connecting channel provided in the side support.

[0012] The open end of the side sleeve is connected to the end of the outer cylinder with an installation ring. The closed end of the side sleeve is coaxially provided with a side nozzle, and the end of the side nozzle is connected to the valve.

[0013] The side sleeve is fitted with a rotating body one and a rotating body two. The rotating body one is close to the mounting ring, and a connecting hole is provided through the end face of the rotating body one. One end of the rotating body two is provided with a connecting groove that communicates with the connecting hole, and the other end is provided with a side hole coaxially for realizing the connection groove and the side nozzle.

[0014] As a further improvement and optimization of the present invention, the connecting shaft is hollow, and the other end of the connecting shaft is rotatably connected to the input pipe. The annular disk and the end of the filter sleeve are rotatably fitted. A fixed gear is provided in the area between the side support and the annular disk, and the fixed gear is connected to the side support.

[0015] One end of the auger extends into the area between the side support and the annular disc, and is equipped with a gear that meshes with the fixed gear. The other end of the auger passes through the connecting hole and is movably connected to the bottom of the connecting groove.

[0016] As a further improvement and optimization of the present invention, a main motor for driving the connecting shaft to rotate is provided on the frame.

[0017] As a further improvement and optimization of the present invention, multiple scraper shells are arranged in an array along the circumferential direction of the annular disk, and multiple augers and connecting holes are correspondingly arranged.

[0018] As a further improvement and optimization of the present invention, the open end of the scraper shell is configured as an arc shape that fits against the inner wall of the filter sleeve. The two sides of the open end of the scraper shell along the circumferential direction of the connecting shaft are respectively named the first side and the second side. The first side is located directly in front of the second side along the rotation direction of the connecting shaft, and a notch is provided on the first side.

[0019] As a further improvement and optimization of the present invention, the recycling component includes a fixed base, which consists of two fixed plates distributed vertically, and a circular mounting area is formed between the two fixed plates. A rotating disk is installed in the mounting area, and the rotating disk is driven to rotate by an auxiliary motor set on the fixed base.

[0020] The end face of the fixed base is arranged with two through holes in a circumferential direction. The two through holes are a recovery hole and a slag removal hole, respectively. The end face of the rotating disk is arranged with two mounting holes in a circumferential direction. Each mounting hole is equipped with a filter screen. Initially, the two mounting holes are located in the two through holes, respectively.

[0021] The upper opening of the recovery hole is equipped with a connector, which is connected to the connecting pipe. The lower opening of the recovery hole is equipped with a recovery cylinder, and the outer surface of the recovery cylinder is equipped with a recovery nozzle. The end of the recovery nozzle is connected to valve three.

[0022] As a further improvement and optimization of the present invention, the outer surface of the filter screen extends downward with a raised edge, which is connected to the mounting hole.

[0023] A filtration method for a molten plastic filter assembly includes the following steps:

[0024] Step 1: Molten plastic enters the filter sleeve through the input pipe and connecting shaft. Then, the molten plastic passes through the micropores of the filter sleeve and is output through the annular area, connecting channel, nozzle, connecting pipe and output pipe. Impurities remain on the inner wall of the filter sleeve.

[0025] At the same time, the connecting shaft rotates together with the scraper shell and the auger. With the cooperation of the fixed gear and the split gear, the auger rotates around its own axis. Through the cooperation of the auger rotating around the connecting shaft and the auger rotating around its own axis, the impurities left on the inner wall of the filter sleeve are pulled and enter the recovery component through the connecting hole, connecting groove, side hole and side nozzle.

[0026] Step 2: The recycling component performs secondary filtration on the impurities and the molten plastic that entered the recycling component along with the impurities. The molten plastic after secondary filtration is output through the connecting pipe and the output pipe, while the impurities remain in the recycling component.

[0027] Compared with the prior art, the beneficial effects of this invention are as follows:

[0028] Technical effect 1: By combining the filtration and recycling components, it is possible to filter impurities from molten plastic without losing too much good material.

[0029] Furthermore, the entire filtration process can be carried out continuously without stopping the machine, thereby providing a continuous and uninterrupted material supply to the injection molding machine.

[0030] Technical effect 2: In this case, by driving the auger to revolve and rotate, it is possible to achieve a comprehensive and thorough cleaning of impurities from the filter sleeve.

[0031] Technical effect 3: with Figure 6 Taking the perspective as an example, the auger rotates clockwise. Therefore, impurities on the inner wall of the filter sleeve can enter the scraper shell through the notch and be pulled away by the rotation of the auger. During this process: the molten plastic in the filter sleeve needs to be pushed by pressure, but because the auger in the scraper shell is continuously pulling the impurities and some of the molten plastic away, on the one hand, the scraper shell can isolate the pressure of the molten plastic flowing outward through the filter sleeve and pushing the impurities against the inner wall of the filter sleeve. On the other hand, the auger's continuous unidirectional movement of pulling the impurities and some of the molten plastic towards the recycling component will generate a fluid negative pressure, which will cause the impurities attached to the inner wall of the filter sleeve to detach from the inner wall of the filter sleeve and flow towards the recycling component together. The combination of the two can not only better achieve the impurity cleaning work, but also further reduce the damage to the filter sleeve during impurity cleaning.

[0032] Technical effect 4: In this case, the faster the auger revolves around the center, the faster it rotates on its own axis. Therefore, initially, there are fewer impurities on the inner wall of the filter sleeve, so the revolution and rotation can be slower to reduce the amount of molten plastic carried out. After a preset time, there are more impurities on the inner wall of the filter sleeve, so the revolution and rotation can be accelerated to pull the impurities out in time.

[0033] Furthermore, a high-temperature pressure sensor can be installed inside the filter sleeve to monitor pressure fluctuations in real time. If the pressure value is greater than the preset value, it indicates that the micropores of the filter sleeve are blocked and the rotation needs to be accelerated. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the present invention;

[0035] Figure 2 This is a cross-sectional view of the present invention;

[0036] Figure 3 This is a cross-sectional view of the filter component;

[0037] Figure 4 This is a schematic diagram of the scraper unit;

[0038] Figure 5 Cross-sectional views of solid of revolution one and solid of revolution two;

[0039] Figure 6 Cross-sectional view of the filter sleeve, scraper housing, and auger;

[0040] Figure 7 A cross-sectional view of the recycled components;

[0041] Figure 8 This is a sectional view of the mounting base.

[0042] The labels in the attached diagram are:

[0043] 100. Frame; 101. Input pipe; 102. Output pipe; 103. Connecting pipe; 104. Valve 1; 105. Valve 2; 106. Valve 3; 107. Main motor; 108. Slag storage box; 200. Filter assembly; 201. Outer cylinder; 202. Side support; 203. Side sleeve; 204. Mounting ring; 205. Filter sleeve; 206. Annular area; 207. Connecting nozzle; 208. Connecting channel; 209. Side nozzle; 210. Rotating body 1; 211. 212. Rotating body 2; 213. Connecting hole; 214. Connecting groove; 215. Scraper unit; 216. Connecting shaft; 217. Circular disc; 218. Scraper housing; 219. Screwdriver; 220. Fixed gear; 221. Dividing gear; 222. Notch; 300. Recycling assembly; 301. Recycling cylinder; 302. Recycling nozzle; 303. Auxiliary motor; 304. Fixed base; 305. Through hole; 306. Rotating disc; 307. Filter screen; 308. Protruding edge; 309. Connector. Detailed Implementation

[0044] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0045] Reference Figure 1 and Figure 2 A molten plastic filter assembly includes a frame 100, on which a filter assembly 200 and a recovery assembly 300 are disposed, wherein:

[0046] An input pipe 101 is connected to the molten plastic input end of the filter assembly 200. The impurity output end of the filter assembly 200 is connected to the impurity input end of the recovery assembly 300, and a valve 106 is provided at the connection. The molten plastic output end of the filter assembly 200 and the molten plastic output end of the recovery assembly 300 are connected by a connecting pipe 103. A valve 105 and an output pipe 102 are provided on the connecting pipe 103. The valve 105 is close to the recovery assembly 300. A valve 104 is provided at the connection between the output pipe 102 and the connecting pipe 103.

[0047] In use, molten plastic enters the filter assembly 200 through the input pipe 101. Impurities are pulled by the scraper unit 214 in the filter assembly 200 and move into the recovery assembly 300. The molten plastic passes through the micropores of the filter sleeve 205 of the filter assembly 200 and is output through the molten plastic output end of the filter assembly 200, the connecting pipe 103 and the output pipe 102.

[0048] Meanwhile, some of the molten plastic that flows along with the impurities is recovered by the recycling component 300 and output through the connecting pipe 103 and the output pipe 102, while the impurities are ultimately left in the recycling component 300.

[0049] Filter component 200:

[0050] Reference Figures 3-6 The filter assembly 200 includes an outer cylinder 201 and a side sleeve 203.

[0051] A side support 202 is provided at one open end of the outer cylinder 201, and an installation ring 204 is coaxially sleeved inside the other open end of the outer cylinder 201. A filter sleeve 205 is provided between the installation ring 204 and the side support 202. An annular region 206 is formed between the outer wall of the filter sleeve 205 and the inner wall of the outer cylinder 201. Furthermore, a connector 207 is provided on the outer surface of the side support 202. The end of the connector 207 is connected to the connecting pipe 103. The connector 207 and the annular region 206 are connected by a connecting channel 208 provided in the side support 202.

[0052] The open end of the side sleeve 203 is connected to the end of the outer cylinder 201 where the mounting ring 204 is provided. The closed end of the side sleeve 203 is coaxially provided with a side nozzle 209. Furthermore, the side sleeve 203 is fitted with a first rotating body 210 and a second rotating body 211. The first rotating body 210 is close to the mounting ring 204, and a connecting hole 212 is provided through the end face of the first rotating body 210. The second rotating body 211 is provided with a connecting groove 213 at one end facing the mounting ring 204. The connecting groove 213 communicates with the connecting hole 212. The other end of the second rotating body 211 is coaxially provided with a side hole, which is used to realize the communication between the connecting groove 213 and the side nozzle 209.

[0053] Reference Figure 3 The filter assembly 200 also includes a scraper unit 214.

[0054] Specifically, refer to Figure 4 The end face of the side support 202 is provided with a sleeve hole, which is coaxial with the filter sleeve 205.

[0055] The scraper unit 214 includes a connecting shaft 215 fitted inside the sleeve hole. The connecting shaft 215 is a hollow shaft. One end of the connecting shaft 215 is rotatably connected to the input pipe 101, and the other end extends into the filter sleeve 205. A circular disc 216 is coaxially arranged on the outside. The circular disc 216 is rotatably engaged with the end of the filter sleeve 205. No micropores are provided near the end of the filter sleeve 205.

[0056] The frame 100 is equipped with a main motor 107 for driving the connecting shaft 215 to rotate. A fixed gear 219 is provided in the area between the side support 202 and the annular disk 216. The fixed gear 219 is connected to the side support 202 and is coaxial with the annular disk 216.

[0057] A scraper shell 217 is provided on the side of the annular disk 216 away from the side support 202. The extension direction of the scraper shell 217 is parallel to the axis of the filter sleeve 205. The scraper shell 217 is open on the side facing the inner wall of the filter sleeve 205. An auger 218 is provided inside the scraper shell 217. The outer surface of the auger 218 is close to the inner wall of the filter sleeve 205. One end of the auger 218 extends into the area between the side support 202 and the annular disk 216 and is provided with a dividing gear 220 that meshes with the fixed gear 219. The other end of the auger 218 passes through the connecting hole 212 and is movably connected to the bottom of the connecting groove 213.

[0058] Preferred embodiments, refer to Figure 6 The open end of the scraper housing 217 is configured as an arc-shaped surface that fits against the inner wall of the filter sleeve 205. The two sides of the open end of the scraper housing 217 along the circumferential direction of the connecting shaft 215 are respectively named the first side and the second side. The first side is located directly in front of the second side along the rotation direction of the connecting shaft 215. A notch 221 is provided on the first side to allow for... Figure 6 Taking the perspective as an example, if the connecting shaft 215 rotates clockwise, then the first side will be located to the right of the second side.

[0059] The working process of filter component 200:

[0060] Molten plastic enters the filter sleeve 205 through the input pipe 101 and the connecting shaft 215. Then, the molten plastic passes through the micropores of the filter sleeve 205 and is output through the annular area 206, the connecting channel 208, the nozzle 207, the connecting pipe 103, and the output pipe 102, while impurities remain on the inner wall of the filter sleeve 205.

[0061] At the same time, the main motor 107 drives the connecting shaft 215 to rotate. The connecting shaft 215, along with the scraper shell 217 and the auger 218, rotates together, which is called revolution. Meanwhile, with the cooperation of the fixed gear 219 and the dividing gear 220, the auger 218 rotates around its own axis, which is called rotation. The two work together to pull the impurities left on the inner wall of the filter sleeve 205 and enter the recovery assembly 300 through the connecting hole 212, the connecting groove 213, the side hole, and the side nozzle 209.

[0062] Its technological advantages lie in:

[0063] Technical effect 1: In this case, by driving the auger to revolve and rotate, it is possible to achieve a comprehensive and thorough cleaning of impurities from the filter sleeve.

[0064] Technical effect 2: with Figure 6 Taking the perspective as an example, the auger rotates clockwise. Therefore, impurities on the inner wall of the filter sleeve can enter the scraper shell through the notch and be pulled away by the rotation of the auger. During this process: the molten plastic in the filter sleeve needs to be pushed by pressure, but because the auger in the scraper shell is continuously pulling the impurities and some of the molten plastic away, on the one hand, the scraper shell can isolate the pressure of the molten plastic flowing outward through the filter sleeve and pushing the impurities against the inner wall of the filter sleeve. On the other hand, the auger's continuous unidirectional movement of pulling the impurities and some of the molten plastic towards the recycling component will generate a fluid negative pressure, which will cause the impurities attached to the inner wall of the filter sleeve to detach from the inner wall of the filter sleeve and flow towards the recycling component together. The combination of the two can not only better achieve the impurity cleaning work, but also further reduce the damage to the filter sleeve during impurity cleaning.

[0065] Technical effect 3: In this case, the faster the auger revolves around the center, the faster it rotates on its own axis. Therefore, initially, there are fewer impurities on the inner wall of the filter sleeve, so the revolution and rotation can be slower to reduce the amount of molten plastic carried out. After a preset time, there are more impurities on the inner wall of the filter sleeve, so the revolution and rotation can be accelerated to pull the impurities out in time.

[0066] Component 300:

[0067] Reference Figure 7 and Figure 8 The recycling component 300 includes a fixed base 304, which consists of two fixed plates distributed vertically. A circular mounting area is formed between the two fixed plates. A rotating disk 306 is installed in the mounting area and is driven to rotate by an auxiliary motor 303.

[0068] The end face of the fixed base 304 is provided with two through holes 305 arranged in a circumferential direction, and named the recovery hole and the slag removal hole respectively. The end face of the rotating disk 306 is provided with two mounting holes arranged in a circumferential direction. A filter screen 307 is provided in each of the two mounting holes. Initially, the two mounting holes are coaxially located in the two through holes 305 respectively.

[0069] The upper opening of the recycling hole is equipped with a connector 309, which is connected to the connecting pipe 103.

[0070] A recycling cylinder 301 is provided at the lower opening of the recycling hole. A recycling nozzle 302 is provided on the outer surface of the recycling cylinder 301. The end of the recycling nozzle 302 is connected to the side nozzle 209 and a valve 3 106 is provided at the connection.

[0071] The working process of recycling component 300:

[0072] Impurities and some molten plastic will enter the recycling cylinder 301 through the side nozzle 209 and the recycling nozzle 302. When the recycling cylinder 301 is full, the molten plastic will pass through the corresponding filter screen 307 and be output through the connecting pipe 103 and the output pipe 102, while the impurities will remain on the filter screen 307.

[0073] After the preset time, the auxiliary motor 303 drives the rotating disk 306 to rotate 180 degrees, causing the two filter screens 307 to exchange positions. The filter screens 307 that were previously covered with impurities are cleaned at the cleaning holes. The cleaning method can use existing technology and will not be described in detail.

[0074] In a preferred embodiment, during the rotation of the rotating disk 306 and the interchange of positions of the two filter screens 307, the lower surface of the filter screen 307 comes into contact with the upper surface of the fixing plate that forms the fixing base 304 and is located below it, causing impurities to be scraped off and fall into the collection cylinder 301. Therefore, the impurity cleaning is ineffective. To solve this problem, refer to... Figure 8 The outer surface of the filter screen 307 has a downward-facing protrusion 308, which is connected to the mounting hole. In this way, the lower surface of the filter screen 307 is always lower than the upper surface of the fixing plate located below, thus preventing the above-mentioned problem from occurring.

[0075] Furthermore, refer to Figure 1 Below the slag removal hole is a slag storage box 108, which is used to collect impurities.

[0076] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A molten plastic filter assembly, comprising a frame (100), wherein a filter assembly (200) and a recovery assembly (300) are disposed on the frame (100), characterized in that, An input pipe (101) is connected to the molten plastic input end of the filter assembly (200). The impurity output end of the filter assembly (200) is connected to the impurity input end of the recovery assembly (300), and a valve three (106) is provided at the connection. The molten plastic output end of the filter assembly (200) and the molten plastic output end of the recovery assembly (300) are connected through a connecting pipe (103). A valve two (105) and an output pipe (102) are provided on the connecting pipe (103). A valve one (104) is provided at the connection between the output pipe (102) and the connecting pipe (103). The filter assembly (200) includes an outer cylinder (201) and a side sleeve (203). A side support (202) is provided at one open end of the outer cylinder (201), and an installation ring (204) is sleeved at the other open end. A filter sleeve (205) is provided between the installation ring (204) and the side support (202). The end face of the side support (202) is provided with a sleeve hole, and a connecting shaft (215) is sleeved in the sleeve hole. One end of the connecting shaft (215) extends into the filter sleeve (205) and is provided with a circular disc (216) on the outside. A scraper shell (217) is provided on the side of the circular disc (216) away from the side support (202). The extension direction of the scraper shell (217) is parallel to the axis of the filter sleeve (205). The scraper shell (217) is open on the side facing the inner wall of the filter sleeve (205). An auger (218) is provided inside the scraper shell (217). The outer surface of the auger (218) is close to the inner wall of the filter sleeve (205).

2. The molten plastic filter assembly according to claim 1, characterized in that, An annular region (206) is formed between the outer wall of the filter sleeve (205) and the inner wall of the outer cylinder (201). A connector (207) is provided on the outer surface of the side support (202). The end of the connector (207) is connected to the connecting pipe (103). The connector (207) and the annular region (206) are connected by a connecting channel (208) provided in the side support (202). The open end of the side sleeve (203) is connected to the end of the outer cylinder (201) where the mounting ring (204) is provided. The closed end of the side sleeve (203) is coaxially provided with a side nozzle (209), and the end of the side nozzle (209) is connected to the valve three (106). The side sleeve (203) is fitted with a rotating body one (210) and a rotating body two (211). The rotating body one (210) is close to the mounting ring (204). The end face of the rotating body one (210) is provided with a connecting hole (212). One end of the rotating body two (211) is provided with a connecting groove (213) that communicates with the connecting hole (212), and the other end is coaxially provided with a side hole for communicating with the connecting groove (213) and the side nozzle (209).

3. The molten plastic filter assembly according to claim 2, characterized in that, The connecting shaft (215) is hollow. The other end of the connecting shaft (215) is rotatably connected to the input pipe (101). The annular disk (216) is rotatably fitted to the end of the filter sleeve (205). A fixed gear (219) is provided in the area between the side support (202) and the annular disk (216). The fixed gear (219) is connected to the side support (202). One end of the auger (218) extends into the area between the side support (202) and the annular disk (216) and is provided with a split gear (220) that meshes with the fixed gear (219). The other end of the auger (218) passes through the connecting hole (212) and is movably connected to the bottom of the connecting groove (213).

4. The molten plastic filter assembly according to claim 3, characterized in that, The frame (100) is equipped with a main motor (107) for driving the connecting shaft (215) to rotate.

5. A molten plastic filter assembly according to claim 3, characterized in that, Multiple scraper shells (217) are arranged in an array along the circumference of the annular disk (216), and multiple augers (218) and connecting holes (212) are also arranged accordingly.

6. A molten plastic filter assembly according to claim 3, characterized in that, The open end of the scraper shell (217) is set to be an arc shape that fits against the inner wall of the filter sleeve (205). The two sides of the open end of the scraper shell (217) along the circumferential direction of the connecting shaft (215) are named the first side and the second side, respectively. The first side is located directly in front of the second side along the rotation direction of the connecting shaft (215). A notch (221) is provided on the first side.

7. A molten plastic filter assembly according to claim 2 or 6, characterized in that, The recycling component (300) includes a fixed base (304), which consists of two fixed plates distributed vertically, forming a circular mounting area between the two fixed plates. A rotating disk (306) is installed in the mounting area, and the rotating disk (306) is driven to rotate by an auxiliary motor (303) mounted on the fixed base (304). The end face of the fixed base (304) is provided with two through holes (305) arranged in a circumferential direction. The two through holes (305) are respectively the recovery hole and the slag removal hole. The end face of the rotating disk (306) is provided with two mounting holes arranged in a circumferential direction. A filter screen (307) is provided in each of the two mounting holes. Initially, the two mounting holes are located in the two through holes (305). The upper opening of the recovery hole is provided with a connector (309), which is connected to the connecting pipe (103). The lower opening of the recovery hole is provided with a recovery cylinder (301), and the outer surface of the recovery cylinder (301) is provided with a recovery nozzle (302). The end of the recovery nozzle (302) is connected to the valve three (106).

8. A molten plastic filter assembly according to claim 7, characterized in that, The outer surface of the filter screen (307) has a downwardly extending flange (308), which is connected to the mounting hole.

9. The filtration method for a molten plastic filter assembly as described in claim 6, characterized in that, Includes the following steps: Step 1: Molten plastic enters the filter sleeve (205) through the input pipe (101) and the connecting shaft (215). Then, the molten plastic passes through the micropores of the filter sleeve (205) and is output through the annular area (206), the connecting channel (208), the nozzle (207), the connecting pipe (103), and the output pipe (102). Impurities remain on the inner wall of the filter sleeve (205). At the same time, the connecting shaft (215) rotates together with the scraper shell (217) and the auger (218). With the cooperation of the fixed gear (219) and the split gear (220), the auger (218) rotates around its own axis. Through the cooperation of the auger (218) rotating around the connecting shaft (215) and the auger (218) rotating around its own axis, the impurities left on the inner wall of the filter sleeve (205) are pulled and enter the recovery assembly (300) through the connecting hole (212), the connecting groove (213), the side hole and the side nozzle (209). Step 2: The recycling component (300) performs secondary filtration on the impurities and the molten plastic that enters the recycling component (300) along with the impurities. The molten plastic after secondary filtration is output through the connecting pipe (103) and the output pipe (102), while the impurities remain in the recycling component (300).

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