Filter device for recycled resin

Abstract

To provide a filter device for regenerated resin.SOLUTION: Disclosed is a filter device for a recycled resin, in which a replacement cycle of a filter is significantly reduced, and a filtering process and a discharging process of a target recycled resin injected in a molten state are smoothly performed even in a large amount of processing. In a filter apparatus for recycled resin according to the present invention, a first scrapper, a first filter plate, a first orifice plate, a second orifice plate, a second filter plate, and a second scrapper are sequentially coupled to a shaft in a main body having the shaft therein and a closed rear surface, and an opening / closing device, a first inlet, a second inlet, an outlet, a first waste outlet, and a second waste outlet are provided in the main body.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a filter device for recycled resin, and more particularly to a filter device that replaces a screen filter that has been used in the past when producing recycled resin. [Background technology]

[0002] A large number of plastic products are consumed every year, and most of them are discarded after use. Technology to periodically collect and recycle these products is expected to play an important role in a circular economy system.

[0003] In order to recycle plastic products, the target recyclable items are melted at the appropriate temperature and filtered to remove foreign matter such as metals, wood components, fiber components, and minerals as waste.

[0004] Conventionally, a screen filter, also known as a mesh net, has been used in the filtering process for recycling plastic products, but this has problems such as insufficient pressure resistance required when filtering molten recycled resin, frequent replacement due to clogging caused by the waste being filtered, and poor process efficiency.

[0005] Therefore, Patent Document 1 discloses an automatic filter mesh die that uses an impeller to sweep out and separate foreign matter adhering to the filter mesh, and then separates and continuously discharges the foreign matter and liquid recycled plastic. However, there is no space between the rear surface inside the main body and the filter mesh, which makes it difficult to smoothly perform the filtering and discharge processes of the liquid recycled plastic, making it difficult to process a relatively large amount of recycled plastic at a high yield. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Korean Patent No. 10-1609482 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention provides a filter device for recycled resin that significantly reduces the filter replacement cycle and enables smooth filtering and discharging of the target recycled resin injected in a molten state even when processing a large amount of material. [Means for solving the problem]

[0008] In order to solve the above problem, the present invention provides a main body having a shaft therein and a closed rear surface, a first scraper that rotates by rotation of the shaft, a first filter plate having a plurality of first holes formed on an inner surface that contacts the scraper and a plurality of second holes larger than the first holes formed on an outer surface, a first orifice plate having a plurality of through holes formed thereon, an inner surface that contacts the outer surface of the first filter plate, first grooves protruding from the inner surface between the plurality of through holes, and second grooves protruding from the outer surface between the plurality of through holes and having a height larger than the first grooves, a second orifice plate having a plurality of through holes formed thereon, an inner surface that contacts the outer surface of the first orifice plate, second grooves protruding from the inner surface between the plurality of through holes, and first grooves protruding from the outer surface between the plurality of through holes and having a height smaller than the second grooves, and a second filter plate having a plurality of second holes formed on an inner surface that contacts the second orifice plate, and a plurality of first holes smaller than the second holes formed on the outer surface. a plate; a second scraper in contact with the outer surface of the second filter plate and rotated by rotation of the shaft; an opening / closing device provided on the front surface of the main body; a first inlet formed on one side of the main body and communicating with a first injection chamber between the rear surface and the first filter plate, and a second inlet formed on the other side of the main body and communicating with a discharge chamber between the first orifice plate and the second orifice plate; a first waste discharge port formed on the bottom surface of the main body and communicating with the first injection chamber between the rear surface and the first filter plate, and a second waste discharge port formed on the bottom surface of the main body and communicating with the first injection chamber between the rear surface and the first filter plate, and a second waste discharge port formed on the bottom surface of the main body and communicating with the second injection chamber between the opening / closing device and the second filter plate, wherein the first scrubber, the first filter plate, the first orifice plate, the second orifice plate, the second filter plate, and the second scraper are sequentially coupled to the shaft.

[0009] The present invention also provides a filter device for recycled resin, wherein the first scraper and the second scraper are S-shaped scrapers.

[0010] The present invention also provides a filter device for recycled resin, characterized in that a flow path is formed between the first hole and the second hole.

[0011] The present invention also provides a filter device for recycled resin, wherein the first groove has a continuous cross section around the axis.

[0012] The present invention also provides a filter device for recycled resin, wherein the second groove has a discontinuous cross section around the axis.

[0013] The present invention also provides a filter device for recycled resin, characterized in that the main body has a fixed key formed on its inner surface, and the first filter plate, the first orifice plate, the second orifice plate, and the second filter plate each have a fixed key groove formed therein and are coupled to the corresponding fixed key to prevent rotation.

[0014] The present invention also provides a recycled resin filter device, further comprising: a gasket ring that is axially coupled between the rear surface and the first scraper; a disc spring that contacts the second scraper in the front direction; a spline lock that is gear-coupled to the shaft while contacting the disc spring to transmit torque; and a scraper nut that is nut-coupled to the spline lock, wherein the disc spring, the spline lock, and the scraper nut are coupled to the shaft in order.

[0015] The present invention also provides a filter device for recycled resin, wherein a waste discharge assembly is flange-coupled to the first waste discharge outlet and the second waste discharge outlet, the waste discharge assembly having a first waste discharge connection port and a second waste discharge connection port that are connected to the lower part of the first waste discharge outlet and the second waste discharge outlet, respectively, and the waste discharge assembly has a discharge passage in which a screw connected to a driving means is installed at the lower part of the first waste discharge connection port and the second waste discharge connection port. [Effects of the Invention]

[0016] According to the present invention, a filter device for recycled resin can be provided, which has a filter plate, an orifice plate, and a scraper, which can be made of a metal material, combined inside the main body, and the scraper scrapes foreign matter remaining on the surface of the filter plate and removes it through a waste discharge outlet, thereby significantly reducing the filter replacement cycle.

[0017] In addition, the filter plate has a plurality of first holes formed on its inner surface and a plurality of second holes larger than the first holes formed on its outer surface, the orifice plate has second grooves protruding from its inner surface between the plurality of through holes and first grooves protruding from its outer surface between the plurality of through holes and having a height smaller than the second grooves, and two sets of scrubbers, filter plates, and orifice plates are installed facing each orifice plate, thereby gradually increasing the space in which the molten recycled resin can temporarily remain after passing through the filter plate and the orifice plate, thereby enabling the filtering and discharging processes of the recycled resin injected in a molten state to be performed smoothly even when processing a large amount of recycled resin. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view showing an example of a filter device for recycled resin according to the present invention; [Figure 2] 1 is an exploded perspective view showing an example of a filter device for recycled resin according to the present invention. [Figure 3] 1 is a diagram showing an example of a side cross section of a main body in a filter device for recycled resin according to the present invention. FIG. [Figure 4] 1 is a view showing an example of one side of a main body of a filter device for recycled resin according to the present invention; [Figure 5] 10 is a view showing an example of the other side of the main body in the recycled resin filter device according to the present invention. FIG. [Figure 6]3 is a diagram showing an example of the plan view of a first filter plate and a second filter plate in the recycled resin filter device according to the present invention. FIG. [Figure 7] 3 is a diagram showing an example of the rear surfaces of a first filter plate and a second filter plate in the recycled resin filter device according to the present invention. FIG. [Figure 8] 3 is a diagram showing an example of a cross section of a first filter plate and a second filter plate in the filter device for recycled resin according to the present invention. FIG. [Figure 9] 3 is a diagram showing an example of the planar surfaces of a first orifice plate and a second orifice plate in the filter device for recycled resin according to the present invention. FIG. [Figure 10] 3 is a diagram showing an example of the rear surface of a first orifice plate and a second orifice plate in the filter device for recycled resin according to the present invention. FIG. [Figure 11] 1 is a plan view of an example of a waste discharge assembly in a recycled resin filter device according to the present invention; FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, if it is determined that a detailed description of related prior art may obscure the gist of the present invention, such detailed description will be omitted. In the drawings, parts that are not relevant to the description will be omitted in order to clearly describe the present invention, and similar parts will be given similar reference numerals throughout the specification, and the direction of the detailed configuration of the present invention will be described with reference to the drawings. Furthermore, throughout the specification, when a part "comprises" a certain element, this does not mean that it may exclude other elements, but that it may further include other elements, unless otherwise specified.

[0020] Figures 1 and 2 are oblique and exploded oblique views showing an example of a recycled resin filter device according to the present invention; Figures 3 and 5 are respectively views showing an example of a side cross section, one side, and the other side of the main body in a recycled resin filter device according to the present invention; Figures 6 to 8 are respectively views showing an example of the plan, back, and cross section of the first filter plate and the second filter plate in a recycled resin filter device according to the present invention; Figures 9 and 10 are respectively views showing an example of the plan and back of the first orifice plate and the second orifice plate in a recycled resin filter device according to the present invention; and Figure 11 is a view showing an example of the plan of a waste discharge assembly in a recycled resin filter device according to the present invention.

[0021] 1 to 11, a filter device 100 for recycled resin according to the present invention includes a main body 110 having a shaft 111 therein and a closed rear surface 101, to which a first scraper 120, a first filter plate 130, a first orifice plate 140, a second orifice plate 150, a second filter plate 160, and a second scraper 170 are sequentially coupled. The main body is also provided with an opening / closing device 112, a first inlet 113, a second inlet 114, an outlet 115, a first waste outlet 116, and a second waste outlet 117.

[0022] In the present invention, the combination of the scrappers 120, 170, the filter plates 130, 160, and the orifice plates 140, 150 is provided in two sets: the first scrapper 120, the first filter plate 130, and the first orifice plate 140 are provided in one set, and the second scraper 170, the second filter plate 160, and the second orifice plate 150 are provided in another set.

[0023] The first filter plate 130 is a component that filters the molten target recycled resin from the first injection chamber 106 formed on one side of the main body 110, and has a plurality of first holes 131 formed on its inner surface that contacts the first scraper 120, and a plurality of second holes 132 that are larger than the first holes 131 formed on its outer surface.

[0024] The diameters of the first holes 131 and the second holes 132 may be appropriately determined depending on the condition of the recycled resin to be filtered. For example, the diameter of the first holes 131 may be 0.1 to 5 mm, and the diameter of the second holes 132 may be 10 to 50 mm. The first holes 131 and the second holes 132 may be formed entirely on the inner and outer surfaces of the first filter plate 130. Herein, the terms "inner surface" and "outer surface" refer to the rear and front surfaces of the interior of the main body 110, respectively, and will be used interchangeably hereinafter.

[0025] The second holes 132 may be connected to a plurality of the first holes 131, and recycled resin filtered through the first holes 131 that are not connected to the second holes 132 is discharged to the second holes 132 along a flow path 132 formed between the first holes 131 and the second holes 132. The flow path 133 and the second holes 132 provide a space where the recycled resin that has passed through the first holes 131 can temporarily stay, and the space where the recycled resin stays can be further expanded by connecting to a space between first grooves 141 protruding and formed on the inner surface of an adjacent first orifice plate 140, which will be described later.

[0026] The shapes of the first holes 131 and the second holes 132 are not particularly limited, and may be, for example, circular or honeycomb.

[0027] The first scraper 120 is installed in close contact with the inner surface of the first filter plate 130 and serves to scrape foreign matter remaining on the surface without passing through the first filter plate 130 and drop the scraped foreign matter to the lower end inside the main body 110. The first scraper 120 rotates by rotation of a shaft 111, and the speed of the shaft 111 can be adjusted by a reducer 105, so that the rotation speed of the first scraper 120 can also be adjusted.

[0028] In order to improve the foreign matter removal performance of the first scraper 120, which is rotated in this manner, it is preferable that the shape of the first scraper 120 is S-shaped as shown in the drawing, but it is not limited to this and may be formed in the shape of two to four curved blades.

[0029] The first orifice plate 140 supports the first filter plate 130 and ensures a retention space for the recycled resin filtered by the first filter plate 130, thereby maintaining smooth filtering by the first filter plate 130. Also, the size of the discharge chamber 108, which is a retention space for the recycled resin before it is discharged, is ensured to be larger than the space between the first filter plate 130 and the first orifice plate 140, thereby enabling smooth filtering and discharge of the recycled resin injected in a molten state even when processing a large amount of recycled resin.

[0030] In detail, the first orifice plate 140 has a plurality of through holes 143 formed therein, and its inner surface is in contact with the outer surface of the first filter plate 130. First grooves 141 are protruded from the inner surface between the plurality of through holes 143, and second grooves 142, the height of which is greater than that of the first grooves 141, are protruded from the outer surface between the plurality of through holes 143.

[0031] The diameter of the through holes 143 may be determined appropriately depending on the state of the recycled resin to be filtered, and may be larger than the first holes 131 and smaller than the second holes 132. For example, the diameter of the through holes 143 may be 2 to 20 mm. The through holes 143 may be formed entirely through the inner and outer surfaces of the first orifice plate 140.

[0032] The first groove 141 and the second groove 142 are respectively formed to protrude from the inner and outer surfaces of the first orifice plate 140 together with partition walls. As described above, the first groove 141 ensures a retention space for the recycled resin filtered by the first filter plate 130, and the second groove 142 ensures that the size of the discharge chamber 108 is larger than the space between the first filter plate 130 and the first orifice plate 140.

[0033] The heights of the first groove 141 and the second groove 142 may be appropriately determined depending on the condition of the target recycled resin. For example, the height of the first groove 141 may be 1 to 5 mm, and the height of the second groove 142 may be 3 to 10 mm.

[0034] In this case, it is preferable that the first groove 141 is formed so that the cross section is continuous around the axis, so that the recycled resin that has passed through the first filter plate 130 can quickly flow into the through holes 143 without mixing with other resins as much as possible.

[0035] On the other hand, it is preferable that the second groove 142 is formed so that the cross section is discontinuous around the axis, so that the recycled resin can be smoothly discharged through the discharge port 115 while expanding the space of the discharge chamber 108 by forming the second groove 142.

[0036] The second filter plate 160 is a component that filters the molten target recycled resin from the second injection chamber 107 formed on one side of the main body 110, and has a plurality of second holes 132 formed on its inner surface that contacts the first orifice plate 140, and a plurality of first holes 131 that are smaller than the second holes 132 formed on its outer surface.

[0037] The diameters of the first holes 131 and the second holes 132 may be appropriately determined depending on the state of the recycled resin to be filtered, for example, the diameter of the first holes 131 may be 0.1 to 5 mm, and the diameter of the second holes 132 may be 10 to 50 mm. The first holes 131 and the second holes 132 may be formed entirely on the outer and inner surfaces of the second filter plate 160, respectively.

[0038] The second holes 132 may be connected to a plurality of the first holes 131, and recycled resin filtered through the first holes 131 that are not connected to the second holes 132 is discharged to the second holes 132 along a flow path 132 formed between the first holes 131 and the second holes 132. The flow path 133 and the second holes 132 provide a space where the recycled resin that has passed through the first holes 131 can temporarily stay, and the space where the recycled resin stays can be further expanded by connecting to a space between first grooves 141 that are protruded and formed on the inner surface of the adjacent second orifice plate 150, which will be described later.

[0039] The second scraper 170 is installed in close contact with the outer surface of the second filter plate 160 and serves to scrape foreign matter remaining on the surface without passing through the second filter plate 160 and drop the scraped foreign matter to the lower end inside the main body 110. The second scraper 170 rotates by the rotation of a shaft 111, and the speed of the shaft 111 can be adjusted by a reducer 105, so that the rotation speed of the second scraper 170 can also be adjusted.

[0040] In order to improve the foreign matter removal performance of the second scraper 170, which is rotated in this manner, it is preferable that the shape of the second scraper 170 is S-shaped as shown in the drawing, but it is not limited to this and may be formed in the shape of two to four curved blades.

[0041] The second orifice plate 150 supports the second filter plate 160 and ensures a retention space for the recycled resin filtered by the second filter plate 160, thereby maintaining smooth filtering by the second filter plate 160. Also, the size of the discharge chamber 108, which is a retention space for the recycled resin before it is discharged, is ensured to be larger than the space between the second filter plate 160 and the second orifice plate 150, thereby enabling smooth filtering and discharge processes of the recycled resin injected in a molten state even when processing a large amount of recycled resin.

[0042] In detail, the second orifice plate 150 has a plurality of through holes 143 formed therein, its inner surface contacting the outer surface of the first orifice plate 140, second grooves 142 protruding from the inner surface between the plurality of through holes 143, and first grooves 141 protruding from the outer surface between the plurality of through holes 143, the height of which is smaller than that of the second grooves 142.

[0043] The diameter of the through holes 143 may be determined appropriately depending on the state of the recycled resin to be filtered, and may be larger than the first holes 131 and smaller than the second holes 132. For example, the diameter of the through holes 143 may be 2 to 20 mm. The through holes 143 may be formed entirely through the inner and outer surfaces of the second orifice plate 150.

[0044] The first groove 141 and the second groove 142 are respectively formed to protrude from the outer surface and the inner surface of the second orifice plate 150 together with partition walls. As described above, the first groove 141 ensures a retention space for the recycled resin filtered by the second filter plate 160, and the second groove 142 ensures that the size of the discharge chamber 108 is larger than the space between the second filter plate 160 and the second orifice plate 150. The outer surface of the first orifice plate 140 and the inner surface of the second orifice plate 150 are installed facing each other.

[0045] The heights of the first groove 141 and the second groove 142 may be appropriately determined depending on the condition of the target recycled resin. For example, the height of the first groove 141 may be 1 to 5 mm, and the height of the second groove 142 may be 3 to 10 mm.

[0046] In this case, it is preferable that the first groove 141 is formed so that the cross section is continuous around the axis, so that the recycled resin that has passed through the second filter plate 160 can quickly flow into the through holes 143 without mixing with other resins as much as possible.

[0047] On the other hand, it is preferable that the second groove 142 is formed so that the cross section is discontinuous around the axis, so that the recycled resin can be smoothly discharged through the discharge port 115 while expanding the space of the discharge chamber 108 by forming the second groove 142.

[0048] As described above, the first scraper 120 and the second scraper 170 are configured to rotate with the rotation of the shaft 111, but the first filter plate 130, the first orifice plate 140, the second orifice plate 150, and the second filter plate 160 are configured not to rotate with the rotation of the shaft 111.

[0049] To this end, the main body 110 has a fixed key 118 (only the fixed key of the second orifice plate is shown in the drawings) formed on its inner surface, and the first filter plate 130, the first orifice plate 140, the second orifice plate 150, and the second filter plate 160 have fixed key grooves 134, 141, 151, and 161 formed therein, respectively, which can be coupled to the corresponding fixed keys 118 to prevent rotation.

[0050] In the present invention, in addition to the set of the first scraper 120, the first filter plate 130, and the first orifice plate 140, and the other set of the second scraper 170, the second filter plate 160, and the second orifice plate 160, parts for finishing the rear surface 101 and the front surface 102 of the main body may be provided.

[0051] That is, the rear surface 101 may be provided with a gasket ring 1091, and the front surface 102 may be provided with a disc spring 1092, a spline lock 1093, a scraper nut 1094, and an opening / closing device 112 in this order.

[0052] The gasket ring 1091 is attached to the shaft 111 on the rear surface 101 of the main body to prevent leakage of materials and to stably fasten parts connected to the shaft. The disc spring 1092 is closely installed on the second scraper 170 to maintain tensile and fastening forces of parts connected to the shaft 111, the spline lock 1093 is in contact with the disc spring 1092 and is gear-coupled with the shaft 111 to transmit torque, and the scraper nut 1094 is nut-coupled with the spline lock 1093 to complete the assembly. The opening and closing device 112 may be hingedly installed on the front surface 102 of the main body.

[0053] The first injection port 113 and the second injection port 114 are formed on one side 103 of the main body 110 and are inlets through which the molten target recycled resin is injected. The first injection port 112 is formed to communicate with the first injection chamber 106 between the rear surface 101 and the first filter plate 130, and the second injection port 114 is formed to communicate with the second injection chamber 107 between the opening / closing device 112 and the second filter plate 160.

[0054] In this case, the first injection port 113 and the second injection port 114 may be connected by one pipe, but of course they may also be connected by separate pipes. Melting and injection of the recycled resin are performed by a separately provided heating device and driving means, which are obvious to those skilled in the art and will not be described in detail.

[0055] The discharge port 115 is formed on the other side 104 of the body 110 and serves as an outlet for discharging the filtered recycled resin, and is formed to communicate with the discharge chamber 108 between the first orifice plate 140 and the second orifice plate 150.

[0056] In this case, the outlets 115 may be connected by one pipe, but of course they may also be connected by separate pipes. The discharge of recycled resin is performed by a driving means, which is obvious to those skilled in the art and will not be described in detail.

[0057] The first waste discharge port 116 and the second waste discharge port 117 are formed on the bottom surface of the main body 110 and are outlets for discharging foreign matter that has fallen on the filter plates 130 and 160, respectively. The first waste discharge port 116 is formed to communicate with the first injection chamber 106 between the rear surface 101 and the first filter plate 130, and the second waste discharge port 117 is formed to communicate with the second injection chamber 107 between the opening / closing device 112 and the second filter plate 160.

[0058] The foreign matter discharged through the first waste discharge port 116 and the second waste discharge port 117 may be discharged to the outside through the waste discharge assembly 180 .

[0059] The waste discharge assembly 180 includes a first waste discharge connection port 181 and a second waste discharge connection port 182 that are connected to the bottom of the first waste discharge port 116 and the second waste discharge port 117, respectively, and may be flange-coupled to the bottom of the main body 110.

[0060] In this case, a waste discharge passage 185 having a screw 184 connected to a driving means 183 may be provided below the first waste discharge connection port 181 and the second waste discharge connection port 182. The foreign matter discharged through the first waste discharge port 116 and the second waste discharge port 117 only contains a portion of molten recycled resin, but as the screw 184 rotates, the solid foreign matter is pushed into the screw 184, and the molten recycled resin in a fluid phase is pushed out and flows through or backflows, and then flows back into the filter plates 130 and 160, thereby further improving the yield.

[0061] The present invention has been described in detail with reference to the drawings, but the description of the present invention is for illustrative purposes only, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention.

[0062] Therefore, the scope of the present invention is indicated by the claims below rather than the above description of the invention, and all modifications and variations derived from the meaning, scope and equivalents of the claims should be interpreted as being included within the scope of the present invention. [Explanation of symbols]

[0063] 100: Filter device for recycled resin 101: Rear 102:Front 103: One side 104: Other side 105: Reducer 106: First injection chamber 107: Second injection chamber 108: Exhaust chamber 1091: Gasket ring 1092: Disc spring 1093: Spline lock 1094: Scrapper Nut 110:Main body 111: Axis 112: Switchgear 113: 1st injection port 114:Second injection port 115: Outlet 116: 1st waste outlet 117:Second waste outlet 118: Fixed Key 120: First Scrapper 130: First filter plate 131: 1st hole 132:Second hole 133: Flow path 134, 141, 151, 161: Fixed keyway 140: First orifice plate 141: First Groove 142: Second Groove 143:Through hole 150: Second orifice plate 160: Second filter plate 170: Second Scrapper 180: Waste discharge assembly 181: First waste discharge connection port 182: Second waste discharge connection port 183: Driving means 184: Screw 185: Waste discharge passage

Claims

1. a main body having an internal shaft and a closed rear surface; a first scraper that rotates by rotation of the shaft; a first filter plate having a plurality of first holes formed on an inner surface contacting the first scraper and a plurality of second holes larger than the first holes formed on an outer surface; a first orifice plate having a plurality of through holes formed therein, the first orifice plate having an inner surface in contact with the outer surface of the first filter plate, first grooves formed on the inner surface between the plurality of through holes and second grooves formed on the outer surface between the plurality of through holes and having a height greater than that of the first grooves; a second orifice plate having a plurality of through holes formed therein, an inner surface of the second orifice plate contacting the outer surface of the first orifice plate, second grooves protruding from the inner surface between the plurality of through holes, and first grooves protruding from the outer surface between the plurality of through holes, the height of which is smaller than that of the second grooves; a second filter plate having a plurality of second holes formed on an inner surface contacting the second orifice plate and a plurality of first holes smaller than the second holes formed on an outer surface; a second scraper that contacts the outer surface of the second filter plate and rotates by rotation of the shaft; an opening / closing device provided on the front surface of the main body; a first injection port formed on one side of the body and communicating with a first injection chamber between the rear surface and the first filter plate, and a second injection port formed on one side of the body and communicating with a second injection chamber between the opening / closing device and the second filter plate; an outlet formed on the other side of the body and communicating with an outlet chamber between the first orifice plate and the second orifice plate; a first waste discharge port formed on the bottom surface of the body and communicating with a first injection chamber between the rear surface and the first filter plate, and a second waste discharge port formed on the bottom surface of the body and communicating with a second injection chamber between the opening / closing device and the second filter plate; wherein the first scraper, the first filter plate, the first orifice plate, the second orifice plate, the second filter plate, and the second scraper are sequentially coupled to the shaft.

2. 2. The recycled resin filter device according to claim 1, wherein the first scraper and the second scraper are S-shaped scrapers.

3. 2. The filter device for recycled resin according to claim 1, wherein a flow path is formed between the first hole and the second hole.

4. 2. The filter device for recycled resin according to claim 1, wherein the first groove has a cross section that is continuous around the axis.

5. 2. The filter device for recycled resin according to claim 1, wherein the second groove has a discontinuous cross section around the axis.

6. 2. The filter device for recycled resin according to claim 1, wherein the main body has an internal fixed key formed thereon, and the first filter plate, the first orifice plate, the second orifice plate, and the second filter plate each have a fixed key groove formed therein to be coupled to the corresponding internal fixed key to prevent rotation.

7. a gasket ring axially coupled and finished between the rear surface and the first scraper; a disc spring in contact with the second scraper in the direction of the front surface; a spline lock that is in contact with the disc spring and is gear-coupled with the shaft to transmit torque; a scraper nut that is nut-coupled with the spline lock; 2. The recycled resin filter device according to claim 1, further comprising: the disc spring, the spline lock, and the scraper nut are coupled to the shaft in sequence.

8. a waste discharge assembly including a first waste discharge connection port and a second waste discharge connection port respectively connected to a lower portion of the first waste discharge outlet and the second waste discharge outlet, the waste discharge assembly being flange-coupled; 2. The filter device for recycled resin according to claim 1, wherein the waste discharge assembly has a discharge passage in which a screw connected to a driving means is installed at a lower portion of the first waste discharge connection port and the second waste discharge connection port.

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