US20120234749A1 - Filter Element, Filter Device and Method for Producing a Filter Element - Google Patents

Filter Element, Filter Device and Method for Producing a Filter Element Download PDF

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Publication number
US20120234749A1
US20120234749A1 US13/464,251 US201213464251A US2012234749A1 US 20120234749 A1 US20120234749 A1 US 20120234749A1 US 201213464251 A US201213464251 A US 201213464251A US 2012234749 A1 US2012234749 A1 US 2012234749A1
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United States
Prior art keywords
filter
end sections
terminal edges
filter element
plastic casing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
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US13/464,251
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English (en)
Inventor
Michael Maier
Klaus Gehwolf
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Mann and Hummel GmbH
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Mann and Hummel GmbH
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Filing date
Publication date
Application filed by Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Assigned to MANN+HUMMEL GMBH reassignment MANN+HUMMEL GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GEHWOLF, KLAUS, MAIER, MICHAEL
Publication of US20120234749A1 publication Critical patent/US20120234749A1/en
Priority to US14/524,786 priority Critical patent/US9566731B2/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14065—Positioning or centering articles in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/111—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
    • B01D46/521—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B29C45/14336—Coating a portion of the article, e.g. the edge of the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/70—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/543—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles
    • B29C66/5432—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining more than two hollow-preforms to form said hollow articles joining hollow covers and hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7234—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer
    • B29C66/72343—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a barrier layer for liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2265/00—Casings, housings or mounting for filters specially adapted for separating dispersed particles from gases or vapours
    • B01D2265/04—Permanent measures for connecting different parts of the filter, e.g. welding, glueing or moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/14—Filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material

Definitions

  • This disclosure relates generally to a filter element, in particular with multi-layer filter media, for example, nonwoven filter materials. Moreover, a filter device and a method for producing filter elements are also disclosed.
  • filter for example, in the automotive field, fluids such as fuels, operating media or passenger compartment air, often folded or pleated nonwoven filter materials are used. In this connection, it is often required to connect various edges or end sections of these flat filter materials with each other.
  • Known filter elements are produced, for example, from initially zigzag-folded filter material sheets that are formed to a tubular body. In order to close the tubular body, the terminal fold sections must be connected with each other in a fluid-tight way.
  • the present invention has the object to provide an improved filter element, in particular with connected terminal fold sections of filter bellows media.
  • the filter element has opposed end sections of a filter material sheet that are connected fluid-tightly with each other wherein a molded and/or extruded plastic casing encloses the terminal edges of the end sections.
  • the molded and/or extruded plastic casing seals in this connection the end sections or terminal edges that are connected to each other.
  • the plastic casing encloses the terminal edges across their entire length. In this way, a fluid-tight connection between terminal fold sections resting on each other is achieved when the filter material is folded in a zigzag shape in order to form an endless fold bellows.
  • the plastic casing is applied by means of an injection molding process about and/or on the terminal edges.
  • the plastic casing is applied by means of an extrusion method about and/or on the terminal edges.
  • the proposed plastic casing encloses the sections to be connected to each other completely.
  • filter material in particular nonwoven filter materials and/or filter paper are conceivable.
  • a starting material in general sheets of an appropriate nonwoven filter material or filter paper or a combination thereof are cut, folded and subsequently the end sections are connected to each other. In this way, an endless fold bellows results that is processed further.
  • a filter element has accordingly a flat filter material with at least two end sections wherein the two end sections are secured to each other and no open terminal edges exist because the molded and/or extruded plastic casing encloses both terminal edges of the end sections.
  • the filter material can have several layers wherein, for example, between the layers an absorbent material such as active carbon particles can be filled in.
  • an absorbent material such as active carbon particles
  • filter media are employed that between two layers have active carbon particles that absorb dirt or odor.
  • multi-layer filter media one achieves by the plastic casing that the layers will not fray or particles introduced between the layers will not fall out of the filter element.
  • a filter device that has a corresponding filter element and is embodied as an operating medium filter, for example, a fuel filter, oil filter, or an air or passenger compartment filter for a motor vehicle.
  • an operating medium filter for example, a fuel filter, oil filter, or an air or passenger compartment filter for a motor vehicle.
  • the filter element can be provided in particular between an upper and a lower cover. These are referred to also as filter end disks between which a zigzag-folded filter bellows is provided.
  • the plastic casing can be of the same material as the upper and the lower covers or the employed end disks. Since the end disks must be resistant relative to the media to be filtered, for example, gasoline or lubricants, the same material lends itself in regard to selecting the plastic casing. In this way, it is not necessary to select other, for example, matching adhesives that may also make disposal of a soiled filter more difficult.
  • a method for producing a filter element is proposed.
  • enclosing by molding of opposed terminal edges of end sections of a filter material sheet with a plastic casing for forming an endless bellows or a connection of opposed terminal edges by an extrusion process is carried out.
  • the method comprises that the end sections are resting flat on each other.
  • the filter material sheet can be folded multiple times in a zigzag shape parallel to the terminal edges.
  • the terminal edges are enclosed completely by molding across their entire length. Prior to molding, the end sections are pressed against each other. Moreover, pressing against each other can also be realized during molding.
  • pressing against each other is done by an injection molding tool.
  • Pressing edges can be integrated into the injection molding tool that, on the one hand, secure the filter material surfaces resting on each other and, on the other hand, form a cavity for the plastic material to be injected.
  • These pressing edges can be adjusted at any spacing relative to the terminal edges of the end sections so that the area of the end sections and terminal edges that are to be enclosed by the plastic material can be easily adjusted.
  • FIG. 1 is a perspective illustration of a first embodiment of a filter element
  • FIG. 2 is a perspective illustration of a second embodiment of the filter element
  • FIG. 3 is of cross-sectional illustration of the second embodiment of a filter element
  • FIG. 4 is a schematic illustration of an embodiment of a filter device
  • FIG. 5 presented illustrations for explaining variants of a manufacturing process for filter elements
  • FIG. 6 is a cross-sectional illustration of an alternative embodiment of a filter element
  • FIG. 7 is a section illustration of an embodiment of a manufacturing arrangement for filter elements.
  • FIG. 8 is a section illustration of an embodiment of an extrusion tube for use in the manufacturing arrangement.
  • FIG. 1 shows a first embodiment of a filter element.
  • the filter element 1 is formed of a sheet of a flat filter medium, for example, a nonwoven filter material.
  • a flat filter medium for example, a nonwoven filter material.
  • rectangular nonwoven filter material sheets are formed such that end sections of the sheet 3 rest against each other.
  • the plastic casing 5 is indicated in cross-hatching.
  • the filter element 1 can be inserted, for example, in a filter device into a filter cup so that the fluid to be filtered, for example, fuel, oil but also air, can pass through the filter medium and is purified thereby.
  • the molded plastic casing 5 encloses fluid-tightly the respective two end sections connected to each other across the entire length L or, in the illustration of FIG. 1 , across the entire height.
  • FIG. 2 shows a perspective illustration of a second embodiment wherein a filter element 10 is formed of a zigzag-folded nonwoven filter material.
  • This zigzag-folded filter material is formed to a bellows 2 in that end sections or terminal fold sections 3 are connected to each other by the molded plastic material as a casing 5 . Because of the zigzag folding a larger surface area of the filter material in the filter element 10 is provided.
  • the connection of the end sections 3 of the flat filter material is explained in the following Figures in more detail.
  • FIG. 3 a cross-section of the embodiment illustrated in FIG. 2 of a filter element is shown.
  • one is looking onto the fold profile in the orientation of FIG. 2 from above or downward onto the fold bellows. Accordingly, folds 6 and 15 with opposite orientation result.
  • the two terminal fold sections 3 A, 3 B are connected to each other and sealed relative to each other by the plastic casing 5 that is produced by a plastic injection molding method.
  • the plastic casing 5 encloses completely the terminal edges 4 A, 4 B of the terminal fold sections 3 A, 3 B. From the interior of the fold bellows no fluid can escape through the end sections 3 A, 3 B that are connected to each other.
  • FIG. 4 shows a filter device 11 , for example, as a fuel filter, that is embodied with an afore described filter element 10 .
  • the filter device or the fuel filter 13 comprises a fold bellows 2 formed of a zigzag-folded filter material and secured between two covers 12 , 13 .
  • the fold bellows corresponds to a filter element 10 where two end sections are fluid-tightly connected to each other by the molded plastic casing 5 .
  • the upper cover 13 is provided with a connector 16 that has an opening 17 .
  • the fluid to be filtered can flow, for example, in the direction of arrow 18 into the interior of the fold bellows 10 and flow out through the folds of the filter material.
  • the filter element can be inserted into a filter cup or can be embodied as an angular bellows.
  • the covers 12 , 13 are also referred to as end disks.
  • FIG. 5 serve for explaining the variants of the manufacturing process for corresponding filter elements.
  • a flat filter material sheet 2 is provided.
  • the filter material sheet 2 is of a rectangular shape, for example.
  • the opposed end sections 3 A, 3 B are thus to be connected to each other so that a tubular filter element body is formed.
  • the terminal edges 4 A, 4 B are thus placed against each other.
  • the filter material sheet is first pleated or folded. This is illustrated in FIG. 5B .
  • FIG. 5B There are different methods known for folding filter materials in a zigzag shape. For example, oppositely engaging folding blades can be used that produce folds in different orientation 6 , 15 in the filter sheets. Also, rotating blade arrangements are known.
  • FIG. 5B a folded filter material sheet is illustrated wherein the end sections 3 A, 3 B now correspond to the terminal fold sections 3 A, 3 B.
  • FIG. 5C shows a cross-sectional illustration, similar to FIG. 3 .
  • the zigzag-shaped filter material sheet is bent such that the two end sections 3 A, 3 B rest flat on each other.
  • the terminal edges 4 A, 4 B form a common terminal edge.
  • FIG. 5D shows schematically in cross-section a two-part injection molding tool 7 A. 7 B.
  • the injection molding tool for example, can press like a clamp by means of the pressing edges 14 A, 14 B the two end sections 3 A, 3 B onto or against each other.
  • a cavity is formed about the terminal fold edges 4 A, 4 B.
  • FIG. 5E The two injection molding tool parts 7 A, 7 B enclose in this connection a cavity 9 .
  • the liquid plastic material is now introduced under pressure.
  • FIG. 5F shows how the solidified plastic material after injection molding is still within the injection mold 7 A, 7 B.
  • the solidified plastic material forms thus a plastic casing 5 , indicated in FIG. 5F by crosshatching.
  • the spacing of the pressing edges 14 A, 14 B from the terminal edges 4 A, 4 B of the end sections 3 A, 3 B can be matched as desired to the respective conditions. If the endless bellows seam connection along the edges 4 A, 4 B is to be especially robust, it is possible to enlarge the spacing or the surface that is enclosed by the plastic material.
  • FIG. 6 shows a section illustration of an alternative embodiment for end sections or terminal edges of a filter material sheet that are to be connected to each other. Here, multi-layer filter media are illustrated. FIG. 6 shows only the end sections with terminal edges enclosed by the casing 5 in cross-section.
  • the filter material sheet that is formed to an endless bellows has two layers 2 A, 2 B of a nonwoven filter material. Between the layers 2 A, 2 B, for example, active carbon particles 19 are strewn that serve as an absorber.
  • the casing 5 is formed of molded plastic material.
  • FIG. 6 also shows that the terminal edges 4 A, 4 B of the filter material sheet 2 A, 2 B are enclosed by the casing 5 . This means in particular that the activated carbon particles 19 cannot fall out.
  • FIGS. 7 and 8 show an arrangement for performing an alternative variant of the manufacturing process for a filter element.
  • the manufacturing arrangement 20 has an extruder device 33 that serves for providing liquid plastic material.
  • a cylinder 21 is provided with heating elements 25 wherein in the interior of the extruder cylinder or extruder tube 21 an advancing worm 34 is provided.
  • the advancing worm 34 serves for conveying granular plastic material 23 , filled in by means of a hopper 22 into the interior of the cylinder 21 , to the right in the orientation of FIGS. 7 to 8 .
  • melting of the granular plastic material or of the plastic granulates by heating elements 25 is realized.
  • the drive action of the conveying worm 34 is realized by means of a motor 27 that is coupled by a shaft 29 to a reduction gearbox 28 .
  • a tool 26 is coupled that is also heated.
  • liquid plastic material is ready in the tool 26 for enclosing the end sections resting against each other.
  • a slitted tube 30 is used.
  • the longitudinally slitted tube 30 serves for holding the terminal edges or end sections of the filter material together and, at the same time, they serve as a mold or tool for the plastic casing.
  • the tube 30 is illustrated in cross-section.
  • the tube 30 has a slot in which the terminal fold sections 3 A and 3 B of the filter material are clamped. Because of the tubular shape the two tubular sections 14 A, 14 B are pressing like a clamp the two filter material layers 3 A, 3 B onto each other. Within the tube, moreover, as indicated by the dash-dotted lines, a profile can be formed.
  • the zigzag-folded or pleated filter material can be inserted into the tube slit 35 (compare FIG. 7 ). Subsequently, into the interior of the tube 30 the liquid plastic material is introduced. After cooling, a plastic casing 5 results about the terminal edges 4 A, 4 B and parts of the terminal sections 3 A, 3 B.
  • filter elements 10 are clamped in the tubular slit 35 or are provided with the plastic casing 5 .
  • the several filter elements 10 in the orientation of FIG. 7 to the right, can be separated from each other by a cutting device 32 .
  • the extrusion tube 30 and the cutting device 32 are supported on supports 31 .
  • the slitted tube can be provided at the inner side with a coating in order to reduce adhesion of the liquid plastic material.
  • the inner side of the tube can be provided with any type of a profile in order to realize, for example, desired geometries for the casing.
  • the proposed measures for closing off the end sections or manufacturing processes of filter elements and filter devices provide a particular seal-tightness of this bellows seam connection or the connection of the end sections. Moreover, an improved visual appearance is provided because no further auxiliary means such as clamps or adhesive are used. Moreover, in particular in the manufacture of a filter, generally no additional further material is required therein so that processing can be realized particularly cost-efficiently.
  • a plastic material as a casing that is used, for example, in the covers or end disks of the filter device, disposal of the corresponding filters is also possible in a particularly simple and inexpensive way.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Materials (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Filtration Of Liquid (AREA)
US13/464,251 2009-11-05 2012-05-04 Filter Element, Filter Device and Method for Producing a Filter Element Abandoned US20120234749A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US14/524,786 US9566731B2 (en) 2009-11-05 2014-10-27 Filter element, filter device and method for producing a filter element

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102009052123.2 2009-11-05
DE102009052123A DE102009052123A1 (de) 2009-11-05 2009-11-05 Filterelement, Filtereinrichtung und Verfahren zum Herstellen eines Filterelements
PCT/EP2010/066880 WO2011054919A1 (de) 2009-11-05 2010-11-05 Filterelement, filtereinrichtung und verfahren zum herstellen eines filterelements

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/066880 Continuation WO2011054919A1 (de) 2009-11-05 2010-11-05 Filterelement, filtereinrichtung und verfahren zum herstellen eines filterelements

Related Child Applications (1)

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US14/524,786 Division US9566731B2 (en) 2009-11-05 2014-10-27 Filter element, filter device and method for producing a filter element

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US20180236378A1 (en) * 2016-03-07 2018-08-23 Mcmaster University Laterally-fed membrane chromatography device
CN109890478A (zh) * 2016-10-27 2019-06-14 曼·胡默尔有限公司 液体清洁元件、液体清洁系统和用于生产液体清洁元件的方法

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USD844103S1 (en) * 2017-01-18 2019-03-26 Yoshida Tekko Kabushiki Kaisha Filtration drum
CN106964218A (zh) * 2017-04-17 2017-07-21 台州绿之源环保股份有限公司 一种空气净化器及其制备方法
CN110448973B (zh) * 2019-08-07 2021-09-17 九江七所精密机电科技有限公司 一种锥形筒式空气滤芯及其制作工艺

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EP2496330B1 (de) 2015-10-14
KR20130004239A (ko) 2013-01-09
EP2496330A1 (de) 2012-09-12
CN102596353B (zh) 2016-01-20
US9566731B2 (en) 2017-02-14
DE102009052123A1 (de) 2011-05-12
US20150115500A1 (en) 2015-04-30
PL2496330T3 (pl) 2016-04-29
CN102596353A (zh) 2012-07-18
WO2011054919A1 (de) 2011-05-12

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