Multi-scraper rotary melt filter

Abstract

The invention discloses a multi-scraper rotary melt filter, and relates to the field of melt filtration. The multi-scraper rotary melt filter comprises a filter shell part, a rotary extrusion mechanism is arranged in the filter shell part, the filter shell part comprises a middle shell and a discharge port formed in the outer wall of the middle shell, a feed port is formed in one end of the middle shell, and a waste discharge screw is arranged at the other end of the middle shell. According to the rotary melt filter with the multiple scrapers, the multiple arc-shaped blades are attached to the inner wall of the filter screen to rotationally scrape waste materials through rotation of the rotary roller mounted at the tail end of an extruder, the filter screen is used for filtering, and the multiple arc-shaped blades are annularly arranged in multiple rows; and the waste materials immediately enter the positions of the next set of arc-shaped blades after leaving the previous set of arc-shaped blades, continuous waste material scraping is achieved, it is guaranteed that the waste materials can rapidly and effectively enter the conical waste storage cavity, the waste materials are prevented from blocking the filter screen, and the filtering efficiency and the material recovery rate are improved.

Description

Technical Field

[0001] The invention relates to the technical field of melt filtration, in particular to a multi-blade rotary melt filter. Background Art

[0002] Melt filter is a kind of filter used in the processing of molten materials. It can continuously filter large particles or other impurities in the melt through the filter element to obtain fine and pure molten material, so as to make the quality of the subsequent condensation of the melt to make the product more reliable.

[0003] However, the existing melt filter is usually installed at the discharge end of the extruder. The natural pressure of the extruder causes the melt to move inside the filter. During the movement, fine materials in the melt pass through the filter and are discharged from the discharge port, while waste materials are blocked by the filter and move forward to the slag discharge area. In this process, large particles of impurities in the melt will adhere to the filter screen, affecting the filtering effect and speed. At the same time, when the impurities clog the filter screen, the melt will not have time to complete the filtration and enter the waste area, resulting in waste of melt materials. For this reason, a multi-blade rotary melt filter is specially provided to solve the above problems. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention provides a multi-blade rotary melt filter, which solves the problem that large particles of impurities in the melt will adhere to the filter screen, affecting the filtering effect and speed. At the same time, when the impurities clog the filter screen, the melt will enter the waste area before completing the filtration, resulting in waste of melt material.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a multi-blade scraper rotary melt filter, comprising a filter housing, a rotary extrusion mechanism is arranged inside the filter housing, the filter housing comprises a middle section housing and a discharge port opened on the outer wall of the middle section housing, a feed port is arranged at one end of the middle section housing, and a waste discharge screw is arranged at the other end of the middle section housing; The rotary extrusion mechanism includes a rotary filter pressurizing element and a supporting mesh cylinder arranged outside the rotary filter pressurizing element, wherein the supporting mesh cylinder is fixedly arranged with the middle section housing, and a discharge chamber connected with the discharge port is arranged between the two; The inner wall of the supporting mesh cylinder is provided with a filter screen, and an extrusion chamber connected to the feed port is provided between the filter screen and the rotary filter pressurizing element; The waste discharge screw is coaxially fixed with the rotary filter pressurizing element, and the waste discharge screw is arranged at the end of the extrusion chamber for discharging large particles of waste; The outer surface of the rotary filter pressurizing element is provided with a plurality of arc-shaped blades, and the plurality of groups of arc-shaped blades are attached to the inner wall of the filter screen and rotate around the axis of the rotary filter pressurizing element to scrape off waste materials; The arc-shaped blades are inclined toward one side along the axial direction of the rotary filter pressurizing element, and the tail ends of the first group of arc-shaped blades exceed the ends of the second group of arc-shaped blades.

[0006] Preferably, an upper head is fixedly installed at one end of the middle section shell, and the feed port is opened on the outer surface of the upper head. A lower head is fixedly installed at the other end of the middle section shell, and the lower head is sleeved on the outside of the waste discharge screw. Cooling mechanisms are installed at both ends of the middle section shell.

[0007] Preferably, the cooling mechanism comprises: A die seal sleeve is fixed to the outside of the upper die, and one end of the die seal sleeve extends to the inside of the upper die; A material unloading cooling jacket, which is arranged on the outer side of the lower machine head; The head sealing sleeve and the material discharging cooling sleeve are both provided with hollow cooling chambers inside, and the outer side of the hollow cooling chamber is provided with a coolant circulation joint.

[0008] Preferably, a waste discharge pipe is fixedly installed inside one end of the lower head away from the middle shell, the waste discharge screw is rotatably connected to the inside of the waste discharge pipe, and the lower material cooling jacket is fixedly installed on the outer surface of the waste discharge pipe.

[0009] Preferably, a supporting cone is fixedly mounted on the outer surface of the inner end of the waste discharge screw, a conical waste storage cavity is formed between the supporting cone and the inner wall of the lower head, and the conical waste storage cavity is connected to the interior of the waste discharge pipe.

[0010] Preferably, an annular feed cavity is formed between the die head sealing sleeve and the inner wall of the upper die head, and two ends of the annular feed cavity are respectively connected to the feed port and the extrusion chamber.

[0011] Preferably, a rotation drive mechanism is provided inside the head sealing sleeve, and the rotation drive mechanism comprises: A drive shaft mounted on the end of the rotary filter press; A bearing cover chamber, which is fixedly arranged on the outer end surface of the engine head sealing sleeve; A tapered bearing, which is fixedly mounted between the drive shaft and the bearing cover chamber; The engine head sealing group is fixedly mounted on the outer surface of the driving shaft, and the engine head sealing group and the inner wall of the engine head sealing sleeve are arranged to rotate and seal; The machine head wear-resistant sleeve is installed on the outer surface of the connection between the rotary filter pressurizing component and the driving shaft, and the machine head wear-resistant sleeve is rotatably arranged with the inner wall of the machine head sealing sleeve.

[0012] Preferably, the rotary filtering pressure element includes a roller, the arc-shaped blade is installed on the outer surface of the roller, the two ends of the roller are respectively integrally formed with a driving connection part and a transmission connection part, and the supporting cone and the head wear-resistant sleeve are respectively fixedly installed on the two ends of the roller.

[0013] Preferably, a drive joint is integrally formed at the end of the drive shaft, and the drive joint is movably connected to the drive connecting part. A transmission joint is fixedly integrally formed at the end of the waste discharge screw, and the transmission joint is movably connected to the transmission connecting part.

[0014] Preferably, an assembly station is provided on the side of the arc-shaped blade facing the rotating roller, a spring member is installed inside the assembly station, the other end of the spring member is fixed inside the rotating roller, and a beveled scraping notch is provided on the side of the arc-shaped blade away from the rotating roller.

[0015] The invention discloses a multi-blade rotary melt filter, which has the following beneficial effects: 1. The multi-blade scraper rotary melt filter squeezes the melt into the feed port through low pressure, and then drives the roller to rotate through the driving shaft, so that multiple arc-shaped blades are fitted to the inner wall of the filter screen and rotate. The arc-shaped blades contact the material, so that fine materials pass through the filter screen and enter the discharge chamber, while coarse materials and impurities that do not pass through the filter screen are scraped off by the arc-shaped blades, so that the impurities move quickly to one end of the conical waste storage cavity. Since the multiple arc-shaped blades are arranged in multiple rows and rings, and the end of the previous group of arc-shaped blades is higher than the front end of the next group of arc-shaped blades, the waste material immediately enters the position of the next group of arc-shaped blades after leaving the previous group of arc-shaped blades, so that the waste residue can quickly enter the conical waste storage cavity, avoiding clogging the filter screen to affect the filtration speed and efficiency, thereby improving the filtration efficiency and material recovery rate.

[0016] 2. The multi-blade scraper rotary melt filter is provided with cooling mechanisms at both the upper head and the lower head. Cooling water circulates through the coolant circulation joint to reduce the temperature at the waste discharge pipe and the rotary drive mechanism, so that the material in the spiral groove of the waste discharge screw is converted from a melt state to a solid state, ensuring continuous and effective extrusion, while also avoiding leakage caused by excessive temperature at the head sealing group leading to seal failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative work.

[0018] Figure 1It is a schematic diagram of the overall outer surface structure of the present invention; Figure 2 It is a schematic diagram of the overall side structure of the present invention; Figure 3 It is a cross-sectional view of the overall internal structure of the present invention; Figure 4 It is a schematic diagram of the outer surface structure of the rotary extruding mechanism of the present invention; Figure 5 This is a schematic diagram of the outer surface structure of the roller of the present invention; Figure 6 This is a cross-sectional view of the internal structure of the roller of the present invention; Figure 7 It is a schematic diagram of the outer surface structure of the transmission joint of the present invention; Figure 8 This is a schematic diagram of the outer surface structure of the drive joint of the present invention; Fig. 9 This is a cross-sectional view of the internal structure of the lower head of the present invention; Fig.10 This is a cross-sectional view of the internal structure of the upper machine head of the present invention; Fig.11 It is a schematic diagram of the outer surface structure of the arc-shaped blade of the present invention.

[0019] In the figure: 1. filter housing; 11. middle housing; 12. upper head; 13. feed port; 14. discharge port; 15. annular feed chamber; 16. discharge chamber; 17. support cone; 18. conical waste storage chamber; 19. waste discharge pipe; 110. waste discharge screw; 111. lower head; 112. transmission joint; 2. rotary drive mechanism; 21. drive shaft; 22. bearing cover chamber; 23. tapered bearing; 24. head seal group; 25. drive Joint; 26, machine head wear-resistant sleeve; 3, cooling mechanism; 31, machine head sealing sleeve; 32, unloading cooling sleeve; 33, hollow cooling chamber; 34, coolant circulation joint; 4, rotary extrusion mechanism; 41, rotary filter pressure member; 411, roller; 412, arc blade; 413, spring member; 414, transmission connection; 415, drive connection; 416, assembly station; 417, bevel scraper notch; 42, filter screen; 43, support mesh cylinder. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are 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.

[0021] The embodiment of the present application provides a multi-blade rotary melt filter to solve the problem that large particles of impurities in the melt will adhere to the filter screen, affecting the filtering effect and speed. At the same time, when the impurities clog the filter screen, the melt will enter the waste area before completing the filtration, resulting in waste of melt material.

[0022] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0023] The embodiment of the invention discloses a multi-blade rotary melt filter.

[0024] According to the attached Figure 1-11 As shown, it includes a filter housing 1, a rotary extrusion mechanism 4 is arranged inside the filter housing 1, the filter housing 1 includes a middle housing 11 and a discharge port 14 opened on the outer wall of the middle housing 11, a feed port 13 is arranged at one end of the middle housing 11, and a waste discharge screw 110 is arranged at the other end of the middle housing 11; The rotary extrusion mechanism 4 includes a rotary filter pressurizing member 41 and a support mesh cylinder 43 disposed outside the rotary filter pressurizing member 41. The support mesh cylinder 43 is fixedly disposed with the middle section housing 11, and a discharge chamber 16 connected with the discharge port 14 is disposed between the two. The inner wall of the supporting mesh cylinder 43 is provided with a filter screen 42, and an extrusion chamber connected to the feed port 13 is provided between the filter screen 42 and the rotary filter pressurizing member 41; The waste discharge screw 110 is coaxially fixed with the rotary filter pressurizing element 41, and the waste discharge screw 110 is arranged at the end of the extrusion chamber for discharging large particles of waste; The outer surface of the rotary filter pressurizing element 41 is provided with a plurality of arc-shaped blades 412. The plurality of arc-shaped blades 412 are attached to the inner wall of the filter screen 42 and rotate around the axis of the rotary filter pressurizing element 41 to scrape off waste materials. The arc-shaped blades 412 are inclined toward one side along the axial direction of the rotary filter pressurizing element 41 , and the tail of the first group of arc-shaped blades 412 exceeds the tip of the second group of arc-shaped blades 412 .

[0025] An upper head 12 is fixedly installed at one end of the middle shell 11, and a feed port 13 is opened on the outer surface of the upper head 12. A lower head 111 is fixedly installed at the other end of the middle shell 11, and the lower head 111 is sleeved on the outside of the waste discharge screw 110. Cooling mechanisms 3 are installed at both ends of the middle shell 11.

[0026] The cooling mechanism 3 includes a head sealing sleeve 31 and a material-discharging cooling sleeve 32. The head sealing sleeve 31 is fixed to the outside of the upper head 12, and one end of the head sealing sleeve 31 extends to the inside of the upper head 12; the material-discharging cooling sleeve 32 is arranged on the outer side of the lower head 111; the head sealing sleeve 31 and the material-discharging cooling sleeve 32 are both provided with a hollow cooling chamber 33 inside, and a coolant circulation joint 34 is provided outside the hollow cooling chamber 33. A waste discharge pipe 19 is fixedly mounted inside one end of the lower head 111 away from the middle section shell 11, and the waste discharge screw 110 is rotatably connected to the inside of the waste discharge pipe 19, and the material-discharging cooling sleeve 32 is fixedly installed on the outer surface of the waste discharge pipe 19.

[0027] The cooling water is circulated through the unloading cooling jacket 32 ​​to reduce the temperature of the waste discharge pipe 19, thereby reducing the temperature of the material in the spiral groove of the waste discharge screw 110, so that it is converted from a molten state to a solid state. The spiral groove of the waste discharge screw 110 is designed at a certain angle to ensure that material is discharged only when the waste discharge screw 110 rotates. When in use, when the drive shaft 21 drives the roller 411 to rotate, it simultaneously drives the waste discharge screw 110 to rotate, so as to realize the spiral conveying of waste outward.

[0028] The coolant circulates through the hollow cooling chamber 33 in the head sealing sleeve 31 to absorb heat, thereby reducing the temperature of the head sealing group 24, ensuring that the plastic melt will not leak out through the gap between the drive shaft 21 and the head sealing group 24. The head sealing group 24 is sealed with a combined packing, which is composed of a copper gasket and a non-metallic thermal insulation gasket in this case.

[0029] A support cone 17 is fixedly mounted on the outer surface of the inner end of the waste discharge screw 110 , and a conical waste storage cavity 18 is formed between the support cone 17 and the inner wall of the lower head 111 , and the conical waste storage cavity 18 is connected to the inside of the waste discharge pipe 19 .

[0030] An annular feed cavity 15 is formed between the die head sealing sleeve 31 and the inner wall of the upper die head 12 , and two ends of the annular feed cavity 15 are respectively connected to the feed port 13 and the extrusion chamber.

[0031] The interior of the head sealing sleeve 31 is provided with a rotary drive mechanism 2, which includes a drive shaft 21, a bearing cover chamber 22, a tapered bearing 23, a head sealing assembly 24 and a head wear-resistant sleeve 26. The drive shaft 21 is installed at the end of the rotary filter pressurizing component 41; the bearing cover chamber 22 is fixedly arranged on the outer end surface of the head sealing sleeve 31; the tapered bearing 23 is fixedly installed between the drive shaft 21 and the bearing cover chamber 22; the head sealing group 24 is fixedly installed on the outer surface of the drive shaft 21, and the head sealing group 24 and the inner wall of the head sealing sleeve 31 are rotatingly sealed; the head wear-resistant sleeve 26 is installed on the outer surface of the connection between the rotary filter pressurizing component 41 and the drive shaft 21, and the head wear-resistant sleeve 26 and the inner wall of the head sealing sleeve 31 are rotatably arranged.

[0032] The tapered bearing 23 is provided to offset the axial thrust of the plastic melt on the drive shaft 21. When working, there is a certain pressure inside the filter, which will force the drive shaft 21 to move backward. This thrust must be offset, so the tapered bearing 23 is provided. This structure can also use a thrust bearing or a thrust sliding bearing.

[0033] The rotary filtering pressure element 41 includes a roller 411, an arc-shaped blade 412 is installed on the outer surface of the roller 411, and a driving connection part 415 and a transmission connection part 414 are integrally formed at both ends of the roller 411. The support cone 17 and the head wear-resistant sleeve 26 are fixedly installed at the two ends of the roller 411 respectively.

[0034] A driving joint 25 is integrally formed at the end of the driving shaft 21 , and the driving joint 25 is movably connected to the driving connection part 415 . A transmission joint 112 is fixedly integrally formed at the end of the waste discharge screw 110 , and the transmission joint 112 is movably connected to the transmission connection part 414 .

[0035] An assembly station 416 is provided on the side of the arc-shaped blade 412 facing the rotating roller 411, and a spring member 413 is installed inside the assembly station 416. The other end of the spring member 413 is fixedly arranged inside the rotating roller 411. A beveled scraper groove 417 is provided on the side of the arc-shaped blade 412 away from the rotating roller 411. The beveled scraper groove 417 reduces the contact area between the arc-shaped blade 412 and the filter screen, thereby effectively scraping off impurities on the inner wall of the filter screen 42.

[0036] Working principle: When the device is in use, the feed port 13 is connected to the extruder, and the melt enters the filter under the natural pressure of the extruder. At the same time, an external drive component is installed at the end of the drive shaft 21 to make the drive shaft 21 start to rotate. At this time, the external melt enters the extrusion chamber through the annular feed cavity 15, and the melt moves along the extrusion chamber to the conical waste storage cavity 18 under the action of pressure. At this time, the drive shaft 21 drives the roller 411 to rotate, so that a plurality of arc-shaped blades 412 are attached to the inner wall of the filter screen 42 for rotation, and under the action of the spring member 413, the arc-shaped blades 412 are tightly attached to the inner wall of the filter screen 42. At this time, the waste residue attached to the inner wall of the filter screen 42 is quickly scraped off by the arc-shaped blades 412, so that the residue material is in a spiral movement state as a whole. In this process, the fine material passes through the filter screen 42 and enters the discharge chamber 16, and is finally discharged through the discharge port 14, while the coarse material and impurities that have not passed through the filter screen 42 are pushed forward into the conical waste storage chamber 18, and then spirally extruded outward through the waste discharge screw 110. In this process, since the multiple arc blades 412 are arranged in multiple rows of rings, and the end of the previous group of arc blades 412 is higher than the front end of the next group of arc blades 412, this allows the material to immediately enter the end position of the next group of arc blades 412 after leaving the previous group of arc blades 412, thereby achieving continuous scraping of waste and avoiding missing scraping of waste, thereby ensuring that when the material enters the conical waste storage chamber 18, most of the material can be filtered and collected, thereby improving the filtration efficiency and material recovery rate.

[0037] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A multi-blade scraper rotary melt filter, comprising a filter housing (1), wherein a rotary extrusion mechanism (4) is arranged inside the filter housing (1). It is characterized by: The filter housing (1) comprises a middle housing (11) and a discharge port (14) provided on the outer wall of the middle housing (11); a feed port (13) is provided at one end of the middle housing (11); and a waste discharge screw (110) is provided at the other end of the middle housing (11); The rotary extrusion mechanism (4) comprises a rotary filter pressurizing element (41) and a supporting mesh cylinder (43) arranged outside the rotary filter pressurizing element (41); the supporting mesh cylinder (43) is fixedly arranged on the middle section housing (11), and a discharge chamber (16) connected to the discharge port (14) is arranged between the two; The inner wall of the supporting mesh cylinder (43) is provided with a filter mesh (42), and an extrusion chamber connected to the feed port (13) is provided between the filter mesh (42) and the rotary filter pressurizing element (41); The waste discharge screw (110) is coaxially fixed to the rotary filter pressurizing element (41), and the waste discharge screw (110) is arranged at the end of the extrusion chamber for discharging large particles of waste; The outer surface of the rotary filter pressurizing element (41) is provided with a plurality of arc-shaped blades (412), and the plurality of groups of arc-shaped blades (412) are attached to the inner wall of the filter screen (42) and rotate around the axis of the rotary filter pressurizing element (41) to scrape off waste materials; The arc-shaped blades (412) are inclined toward one side along the axial direction of the rotary filter pressurizing element (41), and the tail ends of the first group of arc-shaped blades (412) exceed the ends of the second group of arc-shaped blades (412).

2. The multi-blade rotary melt filter according to claim 1, characterized in that: An upper head (12) is fixedly mounted on one end of the middle shell (11), the feed port (13) is opened on the outer surface of the upper head (12), a lower head (111) is fixedly mounted on the other end of the middle shell (11), the lower head (111) is sleeved on the outside of the waste discharge screw (110), and cooling mechanisms (3) are mounted on both ends of the middle shell (11).

3. The multi-blade rotary melt filter according to claim 2, characterized in that: The cooling mechanism (3) comprises: A die seal sleeve (31) is fixed to the outside of the upper die (12), and one end of the die seal sleeve (31) extends to the inside of the upper die (12); A material unloading cooling jacket (32) disposed on the outer side surface of the lower machine head (111); The head sealing sleeve (31) and the material discharging cooling sleeve (32) are both provided with a hollow cooling chamber (33) inside, and a coolant circulation joint (34) is provided outside the hollow cooling chamber (33).

4. The multi-blade rotary melt filter according to claim 3, characterized in that: A waste discharge pipe (19) is fixedly mounted inside one end of the lower machine head (111) away from the middle shell (11), the waste discharge screw (110) is rotatably connected to the inside of the waste discharge pipe (19), and the lower material cooling jacket (32) is fixedly mounted on the outer surface of the waste discharge pipe (19).

5. The multi-blade rotary melt filter according to claim 4, characterized in that: A supporting cone (17) is fixedly mounted on the outer surface of the inner end of the waste discharge screw (110), and a conical waste storage cavity (18) is formed between the supporting cone (17) and the inner wall of the lower machine head (111), and the conical waste storage cavity (18) is connected to the interior of the waste discharge pipe (19).

6. The multi-blade rotary melt filter according to claim 3, characterized in that: An annular feed cavity (15) is formed between the die head sealing sleeve (31) and the inner wall of the upper die head (12), and two ends of the annular feed cavity (15) are respectively connected to the feed port (13) and the extrusion chamber.

7. The multi-blade rotary melt filter according to claim 5, characterized in that: A rotary drive mechanism (2) is arranged inside the machine head sealing sleeve (31), and the rotary drive mechanism (2) comprises: A drive shaft (21) mounted on the end of a rotary filter pressurizing element (41); A bearing cover chamber (22) fixedly disposed on the outer end surface of the engine head sealing sleeve (31); A tapered bearing (23) fixedly mounted between the drive shaft (21) and the bearing cover chamber (22); A machine head sealing group (24) is fixedly mounted on the outer surface of the driving shaft (21), and the machine head sealing group (24) is arranged to rotate and seal with the inner wall of the machine head sealing sleeve (31); The head wear-resistant sleeve (26) is mounted on the outer surface of the connection between the rotary filter pressurizing element (41) and the drive shaft (21), and the head wear-resistant sleeve (26) is rotatably arranged with the inner wall of the head sealing sleeve (31).

8. The multi-blade rotary melt filter according to claim 7, characterized in that: The rotary filtering pressure element (41) comprises a roller (411), the arc-shaped blade (412) is mounted on the outer surface of the roller (411), the two ends of the roller (411) are respectively integrally formed with a driving connection part (415) and a transmission connection part (414), and the supporting cone (17) and the head wear-resistant sleeve (26) are respectively fixedly mounted on the two ends of the roller (411).

9. The multi-blade rotary melt filter according to claim 8, characterized in that: A drive joint (25) is integrally formed at the end of the drive shaft (21), and the drive joint (25) is movably engaged with the drive connection portion (415). A transmission joint (112) is fixedly integrally formed at the end of the waste discharge screw rod (110), and the transmission joint (112) is movably engaged with the transmission connection portion (414).

10. The multi-blade rotary melt filter according to claim 8, characterized in that: An assembly station (416) is provided on the side of the arc-shaped blade (412) facing the rotating roller (411), a spring member (413) is installed inside the assembly station (416), the other end of the spring member (413) is fixedly arranged inside the rotating roller (411), and a beveled scraping notch (417) is provided on the side of the arc-shaped blade (412) away from the rotating roller (411).

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