CN107856275B - Double-screen back flushing self-cleaning continuous filter - Google Patents

Double-screen back flushing self-cleaning continuous filter Download PDF

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Publication number
CN107856275B
CN107856275B CN201711031145.8A CN201711031145A CN107856275B CN 107856275 B CN107856275 B CN 107856275B CN 201711031145 A CN201711031145 A CN 201711031145A CN 107856275 B CN107856275 B CN 107856275B
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CN
China
Prior art keywords
filter body
discharge
suction block
flow channel
suction
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Active
Application number
CN201711031145.8A
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Chinese (zh)
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CN107856275A (en
Inventor
梁斌
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Jingcheng Times Zhejiang Mold Machinery Co ltd
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Jingcheng Times Zhejiang Mold Machinery Co ltd
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Priority to CN201711031145.8A priority Critical patent/CN107856275B/en
Publication of CN107856275A publication Critical patent/CN107856275A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/27Cleaning; Purging; Avoiding contamination
    • B29C48/2725Cleaning; Purging; Avoiding contamination of filters
    • B29C48/2735Cleaning; Purging; Avoiding contamination of filters using scrapers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25Component parts, details or accessories; Auxiliary operations
    • B29C48/36Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50Details of extruders
    • B29C48/69Filters or screens for the moulding material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filtration Of Liquid (AREA)

Abstract

The invention provides a double-screen back flushing self-cleaning continuous filter, which comprises a filter body, wherein a flow channel cavity is arranged in the filter body, and left and right flow channels extend from the flow channel cavity; the front side of the filter body is provided with a feed inlet, the rear side of the filter body is provided with a discharge outlet, and the left flow channel and the right flow channel are converged in the filter body and then discharged through the discharge outlet; the region that is close to left and right sides in the runner cavity installs the filter screen, be provided with the pipeline of installation row material screw rod in the runner cavity about along the direction respectively, row material screw rod front end is connected with the suction block, suction block openly contacts with the filter screen, row material screw rod rear end is provided with bevel gear, filter body upside is provided with drive arrangement, drive arrangement's transmission shaft stretches into in the filter body its front end passes through bevel gear and row material screw rod rear end bevel gear meshing transmission, filter body downside is provided with the waste material and discharges the runner, waste material is discharged the runner top and is located row material screw rod rear end department, both ends are connected with sealed hatch door about the filter body.

Description

Double-screen back flushing self-cleaning continuous filter
Technical Field
The invention relates to a filter, in particular to a double-screen back-flushing self-cleaning continuous filter.
Background
At present, plastic flat wire drawing units, plastic round wire drawing units, plastic extrusion film coating units, plastic film blowing units, plastic calendaring units and other plastic extruders are manufactured, sold and used at home and abroad, plastic raw materials in a molten state are filtered before being extruded to a die head for molding by the plastic extruder, the most common melt filtering structure is the current state, most of the current state of the art, a filter screen is required to be replaced frequently, but the filtering efficiency of the filter screen is lower, particularly when the plastic reworked material is used, the filter screen is replaced frequently due to more impurities, the labor intensity of replacing the filter screen is high, raw materials and electric energy are wasted, the cost and unnecessary trouble are increased, and the normal production is seriously influenced when the filter screen is stopped for replacing.
Disclosure of Invention
In order to solve the problems, the invention provides the double-screen back flushing self-cleaning continuous filter, which can utilize the combination of two filter screens arranged in one melt filter to work respectively in the production process, greatly improves the productivity of the filter, and utilizes the self-cleaning plastic melt filter for discharging the sewage through the rotation of a screw rod, so that the structure is compact, the filtering efficiency of the filter screen can be greatly improved, and meanwhile, the filter screen is convenient to replace.
The technical scheme of the invention is that the double-screen back flushing self-cleaning continuous filter comprises a filter body, wherein a flow channel cavity is arranged in the filter body, and left and right flow channels extend from left and right sides of the flow channel cavity; the front side of the filter body is provided with a feed inlet communicated with the flow channel cavity, the rear side of the filter body is provided with a discharge outlet, and the left flow channel and the right flow channel are converged in the filter body and then discharged through the discharge outlet; the filter is characterized in that a filter screen plate is installed in the area, which is close to the left side and the right side, in the flow channel cavity, a pipeline for installing a discharge screw is respectively arranged in the flow channel cavity along the left-right direction, the discharge screw is installed in the pipeline, the front end of the discharge screw is connected with a suction block, the front surface of the suction block is contacted with the filter screen plate, the rear end of the discharge screw is provided with a bevel gear, the upper side of the filter body is provided with a driving device, the front end of a driving shaft of the driving device stretches into the filter body, and then the front end of the driving device is meshed with the bevel gear at the rear end of the discharge screw to drive, a waste discharge flow channel is arranged at the lower side of the filter body, the top of the waste discharge flow channel is positioned at the rear end of the discharge screw, and the left end and the right ends of the filter body are connected with sealing cabin doors.
Preferably, a suction port is arranged on one side of the suction block, which is contacted with the filter screen plate, a discharge port is arranged on one side of the suction block, which is far away from the filter screen plate, the discharge screw is a hollow screw with a hollow inside, one end of an inner hole of the discharge screw is communicated with the discharge port, and the other end of the inner hole of the discharge screw is communicated with the waste discharge runner.
Preferably, the middle part of the suction block is provided with a mounting hole connected with a discharge screw, the suction port is a sewage storage tank which is arranged along the length direction on the front surface of the suction block and positioned at two sides of the mounting hole, and the sewage storage tank is communicated with a discharge port on the back surface of the suction block.
Preferably, a suction screw is arranged in the waste storage tank of the suction block, and the suction screw and the discharge screw are vertically arranged and are in meshed transmission through a bevel gear.
Preferably, the part of the front surface of the suction block, which is positioned at the lower side of the sewage storage tank, is inwards sunken along the length direction, the sunken part is provided with a scraping blade, the side wall of the sewage storage tank adjacent to the scraping blade is provided with a pore channel for the material to flow through, and the front end surface of the scraping blade is flush with the front surface of the suction block.
Preferably, the part of the front surface of the suction block, which is positioned at the lower side of the sewage storage tank, is provided with a plurality of suction holes, and the bottoms of the suction holes are communicated with the sewage storage tank.
Preferably, a mounting hole connected with a discharge screw is formed in one side end of the suction block, the suction port is a sewage storage tank arranged in the length direction on the front surface of the suction block at one side of the mounting hole, and the sewage storage tank is communicated with a discharge port on the back surface of the suction block.
Preferably, the part of the front surface of the suction block, which is positioned at the lower side of the sewage storage tank, is provided with a groove along the length direction, scraping blades are obliquely arranged on the groove, the side wall of the sewage storage tank adjacent to the scraping blades is provided with a pore channel for the material to flow through, and the front end surface of the scraping blades is flush with the front surface of the suction block.
In the production process, the invention can utilize one melt filter to be provided with the combination of two filter screens to work respectively, thereby greatly improving the productivity of the filter, and the self-cleaning plastic melt filter for discharging the dirt through the rotation of the screw rod is utilized, so that the structure is compact, the filtering efficiency of the filter screen can be greatly improved, and meanwhile, the filter screen is convenient to replace.
Drawings
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a vertical cross-sectional view of the present invention;
FIG. 3 is a horizontal cross-sectional view of the present invention;
FIG. 4 is a schematic diagram of the direct connection structure of the suction screw and the discharge screw in the present invention;
FIG. 5 is a schematic view of a first construction of an absorbent block according to the present invention;
FIG. 6 is a schematic structural view of a second suction block according to the present invention;
FIG. 7 is a schematic view of the back side structure of a second suction block according to the present invention;
FIG. 8 is a schematic structural view of a third suction block according to the present invention;
FIG. 9 is a schematic structural view of a fourth suction block according to the present invention;
wherein: 1-a filter body; 2-a runner cavity; 3-left flow channel; 4-right flow channel; 5-a feed inlet; 6, a discharge hole; 7-a filter screen plate; 8-a discharge screw; 9-a suction block; 10-a driving device; 11-a waste discharge flow channel; 12-sealing the cabin door; 13, a material suction port; 14-a discharge hole; 15-mounting holes; 16-a waste storage tank; 17-a suction screw; 18, a scraping blade; 19-a suction hole.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 4, the invention provides a double-screen back flushing self-cleaning continuous filter, which comprises a filter body 1, wherein a flow channel cavity 2 is arranged in the filter body 1, and left and right flow channels 3 and 4 extend from left and right sides of the flow channel cavity 2; the front side of the filter body 1 is provided with a feed port 5 communicated with the runner cavity 2, the rear side of the filter body 1 is provided with a discharge port 6, and the left runner 3 and the right runner 4 are converged in the filter body 1 and then discharged through the discharge port 6; the filter is characterized in that a filter screen 7 is installed in the region, which is close to the left side and the right side, in the flow channel cavity 2, a pipeline for installing a discharge screw 8 is respectively arranged in the flow channel cavity 2 along the left-right direction, a gap for passing materials is reserved between the discharge screw 8 and the inner wall of the pipeline, the discharge screw 8 is installed in the pipeline, the front end of the suction screw 9 is connected with the suction block 9, the front surface of the suction block 9 is contacted with the filter screen 7, the rear end of the discharge screw 8 is provided with a bevel gear, the upper side of the filter body 1 is provided with a driving device 10, the front end of a driving shaft of the driving device 10 stretches into the filter body 1 to be meshed and driven with the bevel gear at the rear end of the discharge screw 8 through the bevel gear, the lower side of the filter body 1 is provided with a waste discharge flow channel 11, the top of the waste discharge flow channel 11 is positioned at the rear end of the discharge screw 8, the left end and the right end of the filter body 1 is detachably and hermetically connected with a sealing cabin door 12, a suction port 13 is arranged on one side, which is contacted with the filter screen 7, a discharge port 14 is arranged on one side, which is far from the filter screen 7, the discharge port 14 is communicated with the outer wall gap of the discharge screw 8, and the waste material is communicated with the hollow screw 8.
As shown in fig. 5, preferably, a mounting hole 15 connected with the discharge screw 8 is formed in the middle of the suction block 9, the suction port 13 is a waste storage tank 16 arranged along the length direction on the front surface of the suction block 9 at two sides of the mounting hole 15, and the waste storage tank 16 is communicated with the discharge port 14 on the back surface of the suction block 9.
As shown in fig. 6 and 7, preferably, a suction screw 17 is installed in the sewage storage tank 16 of the suction block 9, and the suction screw 17 is vertically arranged with the discharge screw 8 and is engaged with the discharge screw 8 through a bevel gear. The suction screw 17 is synchronously driven by the discharge screw through a bevel gear, and the impurity-containing sewage in the sewage storage tank 16 is quickly conveyed into the inner hole or the outer wall gap of the discharge screw 8.
Preferably, the part of the front surface of the suction block 9 located at the lower side of the sewage storage tank 16 is recessed inwards along the length direction, the recessed part is provided with a scraping blade 18, the side wall of the sewage storage tank 16 adjacent to the scraping blade 18 is provided with a pore channel for the material to flow through, and the front end surface of the scraping blade 18 is flush with the front surface of the suction block 9.
Preferably, the front of the suction block 9 is provided with a plurality of suction holes 19 at the lower side of the sewage storage tank 16, and the bottom of the suction holes 19 is communicated with the sewage storage tank 16.
In actual selection, the scraping blade 18 or the sucking hole 19 is arranged at the lower side of the left dirt storage tank 16, the scraping blade 18 or the sucking hole 19 is arranged at the lower side of the right dirt storage tank 16, and the left and right sides are combined for use, so that no influence is generated.
As shown in fig. 8, preferably, an installation hole 15 connected with the discharge screw 8 is formed at an end portion on one side of the suction block 9, the suction port 13 is a waste storage tank 16 arranged along a length direction on the front surface of the suction block 9 on one side of the installation hole 15, and the waste storage tank 16 is communicated with the discharge port 14 on the back surface of the suction block 9.
As shown in fig. 9, preferably, the portion of the front surface of the suction block 9 located at the lower side of the sewage storage tank 16 is provided with a groove along the length direction, the groove is obliquely provided with scraping blades 18, the side wall of the sewage storage tank 16 adjacent to the scraping blades 18 is provided with a hole channel through which the material flows, and the front end surface of the scraping blades 18 is level with the front surface of the suction block 9.
In the working state, molten materials are injected from a feed inlet 5 of the filter body 1, flow left and right after entering the runner cavity 2, are filtered through a filter screen plate 7, are converged through a left runner 3 or a right runner 4 and are discharged from a discharge outlet 6, and impurities in the materials can be accumulated at the filter screen plate 7 to block meshes of the filter screen plate 3 during the working; the driving device 10 drives the transmission shaft to rotate, the bevel gear drives the discharge screw 8 to rotate, the discharge screw 8 drives the suction block 9 to rotate, the suction block 9 sucks impurities into the suction port 13 along with a small part of materials when scraping the filter screen 7, the impurities are discharged through the discharge port 14, one part of discharged waste is discharged into the waste discharge runner 11 at the rear end of the discharge screw 8 through the inner hole of the discharge screw 8, the other part of waste is discharged through a gap between the external thread of the discharge screw 8 and the inner wall of the pipeline, and finally the waste is discharged into the upper end of the waste discharge runner 11, and finally the waste is discharged out of the filter through the waste discharge runner 11. In the process, the suction block 9 rotates 360 degrees around the discharge screw rod 8, because the periphery of the suction port 13 on the front side of the suction block 9 is tightly attached to the filter screen plate 7, when the material is extruded, a high-pressure situation is formed on the periphery of the whole suction block 9, but because of the sealing effect of the periphery of the suction port 13 of the suction block 9, a near-vacuum space area is formed inside the suction port 13, under the effect of back pressure, a small part of the material can flow back into the suction block 9 after passing through the filter screen plate 7, and impurities attached to meshes of the filter screen plate 7 are backflushed into the suction port 13 and discharged into the waste discharge flow channel 11 through an inner hole or an outer wall gap of the discharge screw rod 8, and finally the filter is discharged. In the process, the suction screw rod 17 is arranged in the suction port 13, and the suction screw rod 17 and the discharge screw rod 8 are in meshed transmission through the bevel gear, so that the waste discharge efficiency in the suction port 13 is further improved, and the waste in the suction port 13 is promoted to be rapidly discharged into the inner hole or the outer wall gap of the discharge screw rod 8. In addition, the arrangement of the scraping blade 18 and the suction holes 19 further enhances the further adsorption effect of the suction block 9 on the dirt containing impurities.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, but any simple modification, equivalent variation or modification made to the above embodiments according to the technical principles of the present invention still falls within the scope of the technical solutions of the present invention.

Claims (2)

1. The utility model provides a two otter board back flush self-cleaning continuous filter, includes filter body (1), its characterized in that: a flow passage cavity (2) is arranged in the filter body (1), and left and right flow passages (3, 4) extend from left and right sides of the flow passage cavity (2); the front side of the filter body (1) is provided with a feed inlet (5) communicated with the flow channel cavity (2), the rear side of the filter body (1) is provided with a discharge outlet (6), and the left flow channel (3) and the right flow channel (4) are converged in the filter body (1) and then discharged through the discharge outlet (6); the filter is characterized in that a filter screen plate (7) is arranged in the area, close to the left side and the right side, in the flow channel cavity (2), a pipeline for installing a discharge screw (8) is arranged in the flow channel cavity (2) along the left-right direction, the discharge screw (8) is installed in the pipeline, the front end of the discharge screw is connected with a suction block (9), the front surface of the suction block (9) is in contact with the filter screen plate (7), the rear end of the discharge screw (8) is provided with a bevel gear, a driving device (10) is arranged on the upper side of the filter body (1), the front end of a driving shaft of the driving device (10) stretches into the filter body (1) and is meshed with a bevel gear at the rear end of the discharge screw (8) through the bevel gear, a waste discharge flow channel (11) is arranged on the lower side of the filter body (1), and the top of the waste discharge flow channel (11) is positioned at the rear end of the discharge screw (8), and the left end and the right end of the filter body (1) are connected with sealing cabin doors (12); a suction port (13) is formed in one side, contacted with the filter screen plate (7), of the suction block (9), a discharge port (14) is formed in one side, far away from the filter screen plate (7), of the suction block (9), the discharge screw (8) is a hollow screw with a hollow inside, one end of an inner hole of the discharge screw (8) is communicated with the discharge port (14), and the other end of the inner hole of the discharge screw is communicated with the waste discharge runner (11); the middle part of the suction block (9) is provided with a mounting hole (15) connected with a discharge screw (8), the suction opening (13) is a sewage storage tank (16) which is arranged along the length direction on the front surface of the suction block (9) at two sides of the mounting hole (15), and the sewage storage tank (16) is communicated with a discharge opening (14) at the back surface of the suction block (9); a sewage storage tank (16) of the sewage suction block (9) is internally provided with a sewage suction screw (17), and the sewage suction screw (17) and the sewage discharge screw (8) are vertically arranged and are in meshed transmission through a bevel gear; the front of the suction block (9) is positioned at the position of the lower side of the sewage storage tank (16) and is inwards sunken along the length direction, a scraping blade (18) is arranged at the sunken position, a pore channel for the material to flow through is arranged on the side wall of the sewage storage tank (16) adjacent to the scraping blade (18), the front end surface of the scraping blade (18) is flush with the front of the suction block (9), or a plurality of suction holes (19) are arranged at the position of the front of the suction block (9) positioned at the lower side of the sewage storage tank (16), and the bottoms of the suction holes (19) are communicated with the sewage storage tank (16).
2. The utility model provides a two otter board back flush self-cleaning continuous filter, includes filter body (1), its characterized in that: a flow passage cavity (2) is arranged in the filter body (1), and left and right flow passages (3, 4) extend from left and right sides of the flow passage cavity (2); the front side of the filter body (1) is provided with a feed inlet (5) communicated with the flow channel cavity (2), the rear side of the filter body (1) is provided with a discharge outlet (6), and the left flow channel (3) and the right flow channel (4) are converged in the filter body (1) and then discharged through the discharge outlet (6); the filter is characterized in that a filter screen plate (7) is arranged in the area, close to the left side and the right side, in the flow channel cavity (2), a pipeline for installing a discharge screw (8) is arranged in the flow channel cavity (2) along the left-right direction, the discharge screw (8) is installed in the pipeline, the front end of the discharge screw is connected with a suction block (9), the front surface of the suction block (9) is in contact with the filter screen plate (7), the rear end of the discharge screw (8) is provided with a bevel gear, a driving device (10) is arranged on the upper side of the filter body (1), the front end of a driving shaft of the driving device (10) stretches into the filter body (1) and is meshed with a bevel gear at the rear end of the discharge screw (8) through the bevel gear, a waste discharge flow channel (11) is arranged on the lower side of the filter body (1), and the top of the waste discharge flow channel (11) is positioned at the rear end of the discharge screw (8), and the left end and the right end of the filter body (1) are connected with sealing cabin doors (12); a suction port (13) is formed in one side, contacted with the filter screen plate (7), of the suction block (9), a discharge port (14) is formed in one side, far away from the filter screen plate (7), of the suction block (9), the discharge screw (8) is a hollow screw with a hollow inside, one end of an inner hole of the discharge screw (8) is communicated with the discharge port (14), and the other end of the inner hole of the discharge screw is communicated with the waste discharge runner (11); the end part of one side of the suction block (9) is provided with a mounting hole (15) connected with a discharge screw (8), the suction port (13) is a sewage storage tank (16) which is arranged on the front surface of the suction block (9) at one side of the mounting hole (15) along the length direction, and the sewage storage tank (16) is communicated with a discharge port (14) at the back surface of the suction block (9); the front of the suction block (9) is provided with a groove along the length direction, scraping blades (18) are obliquely arranged on the groove, the side wall of the suction block (9) adjacent to the scraping blades (18) is provided with a pore channel for the material to flow through, and the front end face of the scraping blades (18) is flush with the front of the suction block (9).
CN201711031145.8A 2017-10-30 2017-10-30 Double-screen back flushing self-cleaning continuous filter Active CN107856275B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711031145.8A CN107856275B (en) 2017-10-30 2017-10-30 Double-screen back flushing self-cleaning continuous filter

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Application Number Priority Date Filing Date Title
CN201711031145.8A CN107856275B (en) 2017-10-30 2017-10-30 Double-screen back flushing self-cleaning continuous filter

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CN107856275A CN107856275A (en) 2018-03-30
CN107856275B true CN107856275B (en) 2023-11-28

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109747076A (en) * 2019-03-20 2019-05-14 杜常德 A kind of plastic molten melt filter device
CN117162438B (en) * 2022-10-31 2024-04-30 无锡市瑞澳矿业科技有限公司 Production equipment for rubber hose for conveying high-wear-resistance ore pulp and application method of production equipment

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Publication number Priority date Publication date Assignee Title
DE3716707A1 (en) * 1987-05-19 1988-12-01 Harald Pohl Continuously operating melt-filter system for coextrusion systems
US6227380B1 (en) * 1996-12-05 2001-05-08 Helmut Bacher Device for filtering fluids containing impurities
JP2004283804A (en) * 2003-03-25 2004-10-14 Cosmo Koki Co Ltd Apparatus for removing impurities in fluid pipe
KR100557985B1 (en) * 2005-05-14 2006-03-06 제이케이이앤씨 주식회사 A wastewater filtering equipment
KR20080032059A (en) * 2008-03-18 2008-04-14 주식회사 알피노필터링시스템 Water filtering apparatus with two-way flushing type screen
CN202208103U (en) * 2011-08-22 2012-05-02 浙江精诚模具机械有限公司 Continuous filter provided with distribution screw rods and used for melt purification of plastic extrusion system
EP2602087A1 (en) * 2011-12-06 2013-06-12 FARE' S.p.A. Apparatus and process for filtering plastic materials
CN207310486U (en) * 2017-10-30 2018-05-04 浙江精诚模具机械有限公司 Double web plates are inverse to rinse automatically cleaning continuous filter

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716707A1 (en) * 1987-05-19 1988-12-01 Harald Pohl Continuously operating melt-filter system for coextrusion systems
US6227380B1 (en) * 1996-12-05 2001-05-08 Helmut Bacher Device for filtering fluids containing impurities
JP2004283804A (en) * 2003-03-25 2004-10-14 Cosmo Koki Co Ltd Apparatus for removing impurities in fluid pipe
KR100557985B1 (en) * 2005-05-14 2006-03-06 제이케이이앤씨 주식회사 A wastewater filtering equipment
KR20080032059A (en) * 2008-03-18 2008-04-14 주식회사 알피노필터링시스템 Water filtering apparatus with two-way flushing type screen
CN202208103U (en) * 2011-08-22 2012-05-02 浙江精诚模具机械有限公司 Continuous filter provided with distribution screw rods and used for melt purification of plastic extrusion system
EP2602087A1 (en) * 2011-12-06 2013-06-12 FARE' S.p.A. Apparatus and process for filtering plastic materials
CN207310486U (en) * 2017-10-30 2018-05-04 浙江精诚模具机械有限公司 Double web plates are inverse to rinse automatically cleaning continuous filter

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