WO2015158581A1 - Élément de filtre - Google Patents

Élément de filtre Download PDF

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Publication number
WO2015158581A1
WO2015158581A1 PCT/EP2015/057568 EP2015057568W WO2015158581A1 WO 2015158581 A1 WO2015158581 A1 WO 2015158581A1 EP 2015057568 W EP2015057568 W EP 2015057568W WO 2015158581 A1 WO2015158581 A1 WO 2015158581A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter element
plastic
filter
individual
filter material
Prior art date
Application number
PCT/EP2015/057568
Other languages
German (de)
English (en)
Inventor
Hartmut Harr
Original Assignee
Mahle International Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mahle International Gmbh filed Critical Mahle International Gmbh
Publication of WO2015158581A1 publication Critical patent/WO2015158581A1/fr

Links

Classifications

    • 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
    • B01D46/523—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material using folded, pleated material with means for maintaining spacing between the pleats or folds
    • 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
    • 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
    • B01D29/23—Supported filter elements arranged for outward flow filtration
    • B01D29/232—Supported filter elements arranged for outward 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
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/12—Pleated filters
    • B01D2201/127—Pleated filters with means for keeping the spacing between the pleats

Definitions

  • the present invention relates to a filter element for purifying a fluid according to the preamble of claim 1.
  • the invention also relates to a method for producing a fold-stabilizing plastic net.
  • a filter element according to the invention for the purification of a fluid consisting of a zigzag folded filter material and a support grid, which is in contact with the filter material over the entire surface.
  • end discs are provided, wherein the connection between the end plate and the filter element takes place by melting or foaming.
  • wrinkle stabilization provided with adhesive wetted thread, wherein the adhesive causes an adhesion between the pleat tips and the thread and wherein the thread extends from one end face to the other end face and extends substantially parallel.
  • the present invention therefore deals with the problem of providing an improvement or at least an alternative embodiment for a filter element of the generic type, which in particular is simple and inexpensive to manufacture and also withstands high pressures.
  • the present invention is based on the general idea of covering a zigzag folded filter material of a filter element with a curable plastic mesh for wrinkle stabilization, said plastic mesh having a plurality of undirected webs extending above and between individual fold backs of the filter material and at contact points with the Filter material are glued to this.
  • a curable plastic mesh for wrinkle stabilization
  • the plastic network is sprayed, for example by means of a nozzle pressurized with compressed air on the plane formed by the individual fold backs and glued when sprayed with the contact points with the filter material.
  • a one-component plastic or a two-component plastic is used.
  • these may in particular include polyamides (PA), polyethersulfones (PES) or amorphous polyalphaolefins (APAO).
  • PA polyamides
  • PES polyethersulfones
  • APAO amorphous polyalphaolefins
  • Amorphous polyalphaolefins in contrast to other polyolefins, are completely amorphous, ie can not be crystallized. They are therefore used in particular for the production of hot melt adhesives (hotmelts) and hotmelt adhesives. Substances used.
  • the major monomer for these amorphous polyalphaolefins is polypropylene.
  • APAOs have good adhesive properties especially on non-polar surfaces and are also resistant to high and low temperatures as well as the influence of moisture.
  • Polyamides PA
  • PA Polyamides
  • Polyamides are due to their excellent strength and toughness for use in the plastic network described above, since they can take over the plastic network important stiffening function.
  • Polyamides also have good chemical resistance to organic solvents.
  • Polyethersulfone (PES) is transparent and chemically resistant, with high thermal resistance and high resistance to chemicals.
  • PES Polyethersulfone
  • the enumerated plastics are only to be regarded purely as examples, so that of course other plastics suitable for this purpose can be used to produce the fold-stabilizing plastic net.
  • a grip area may be provided, in which the webs and thus the plastic network are denser than in a remaining area.
  • the grip area can be arranged adjacent to an end disk. In this way, a reliable and at the same time easy gripping of the filter element, for example, be achieved in an exchange.
  • the grip area can be realized, especially for larger filter elements (commercial vehicle air filter applications) by a thicker / denser spraying of the hot melt there.
  • the following parameters are relevant: air pressure of the spray nozzle, the viscosity of the hot melt, which is influenced by the temperature and the spraying time. The higher the air pressure and the higher the temperature, the finer the bars will be. ever lower the air pressure or the temperature, the thicker the webs.
  • the webs thicker in the grip area than in the remaining area, which serves only for wrinkle stabilization.
  • the same web thickness can be used, however, be sprayed denser on the filter element by a longer spraying time and thus the grip area can be strengthened.
  • the filter elements with the two regions can be produced, inter alia, by the following methods:
  • the nozzle can be adjusted axially.
  • a nozzle with constant air pressure and temperature is used.
  • nozzles for the grip area are set differently from the above parameters than the nozzles for the pure wrinkle stabilization, that is, the remaining area.
  • the present invention is further based on the general idea of specifying a method for producing a folding-stabilizing plastic mesh on a filter element, wherein in this method plastic is sprayed by means of a nozzle pressurized with compressed air on a plane formed by the individual pleats back of the zigzag folded filter material and thereby glued to the contact points with the filter material and then cured tet.
  • plastic is sprayed by means of a nozzle pressurized with compressed air on a plane formed by the individual pleats back of the zigzag folded filter material and thereby glued to the contact points with the filter material and then cured tet.
  • the spraying of the plastic mesh allows a significantly simplified production and at the same time a significantly improved wrinkle stabilization, since the network can not only absorb forces along its longitudinal direction as the thread, but with respect to the power is formed almost homogeneous.
  • the individual fold backs are held at significantly more points, whereby the folding stability can be significantly increased.
  • the individual webs of the plastic network also extend into the spaces between the individual folds and there are glued to the filter material, whereby the sprayed plastic network is not only two-dimensional, but actually three-dimensional.
  • the application or spraying of the liquid plastic thread to the plastic network is manufacturing technology simple, the subsequently cured plastic network ensures optimal wrinkle stabilization.
  • FIG. 1 shows a possible embodiment of a filter element according to the invention
  • FIG. 2 shows a detail of an outer circumferential surface of the filter element according to FIG. 1, FIG.
  • FIG 3 is a detailed view of the plastic network shown in FIG 2,
  • Fig. 4 is a representation as in Fig. 1, but with an additional grip area.
  • a filter element 1 according to the invention which in the present case is in the form of a ring filter element but can also have a different shape as well, has a zigzag folded filter material 2.
  • a cured plastic mesh 3 applied with a variety of undirected webs 4, wherein the webs 4 extend in an undirected manner above and between individual fold back 5 and bonded via contact points 6 with the filter material 2.
  • the fold backs 5 and the contact points 6 are shown in FIG. 1, they can be seen much better in FIGS. 2 and 3.
  • the plastic mesh 3 extends essentially over a plane formed by the individual fold back 5, which represents a curved plane in a design of the filter element 1 as a ring filter element.
  • Individual bars 4 The plastic net 3 can also extend into intermediate spaces 7 of the individual folds, ie between the individual fold backs 5 and be glued there to the filter material 2.
  • the plastic network 3 in particular one-component and two-component plastics are used, in particular for example polyamide (PA), polyethersulfone (PES) or an amorphous polyalphaolefin (APAO).
  • PA polyamide
  • PES polyethersulfone
  • APAO amorphous polyalphaolefin
  • the filter element 1 is constructed in the usual way and has two end plates 8, 9, which close the end face of the filter material 2 by gluing them to the front side of the filter material 2 or the filter material. 2 is foamed into the end plates 8, 9.
  • a handle portion 10 is provided, in which the webs 4 and thus the plastic network 3 are denser than in a remaining area 1 1.
  • the grip region 10 can be arranged adjacent to an end disk 8. In this way, a reliable and at the same time easy gripping of the filter element 1, for example in an exchange can be achieved.
  • the grip area 10 can be realized, especially for larger filter elements (commercial vehicle air filter applications), by a thicker / more dense spraying of the hot melt there.
  • the production of the folding-stabilizing plastic net 3 on the filter element 1 is carried out as follows: First, the filter element 1 is produced in the usual way, wherein this can have, for example, an unscratched but long-known inner frame on an inner circumferential surface.
  • Plastic hotmelt
  • a nozzle pressurized with compressed air which lays in a plane of the zigzag-folded filter material 2 formed by the individual fold backs 5 and bonds and hardens at the contact points 6 described above with the filter material 2.
  • an effective and homogeneous stiffening in the form of a plastic net 3 is provided on the outer circumferential surface of the filter element 1.
  • the grip area 10 can be realized, especially for larger filter elements (commercial vehicle air filter applications), by a thicker / more dense spraying of the hot melt there.
  • the following parameters are relevant: air pressure of the spray nozzle, the viscosity of the hot melt, which is influenced by the temperature and the spray duration.
  • the higher the air pressure and the higher the temperature the finer are the webs 4.
  • the lower the air pressure or the temperature the thicker the webs are 4.
  • the webs 4 can be made thicker to its realization be as in the remaining area 1 1, which serves only for wrinkle stabilization.
  • the same web thickness can also be used, however, sprayed more densely onto the filter element 1 by a longer spraying time and thus the grip area 10 can be strengthened.
  • the filter elements 1 can be produced with the two regions 10, 11, inter alia, by means of the following methods:
  • the filter element 1 rotates and is also axially displaced.
  • the nozzle can be adjusted axially.
  • a nozzle with constant air pressure and temperature is used.
  • the nozzles for the grip area 10 are set differently from the above parameters than the nozzles for the pure wrinkle stabilization, that is, the remaining area 11.
  • the inventive plastic mesh 3 which causes a stiffening of the individual folds of the filter material 2 with its non-directional webs 4, it can be ensured in particular even at high pressures that the filter material 2 is not pushed together, thereby reducing its filter performance is reduced.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Materials (AREA)

Abstract

L'invention concerne un élément de filtre (1) pour la purification d'un fluide, comprenant un matériau de filtre (2) plié en zigzag. La caractéristique essentielle de l'invention est que le réseau en plastique (3) durci servant à la stabilisation des plis est muni d'une multitude d'âmes non orientées (4), les âmes (4) courant de manière non orientée au-dessus et entre les dos des plis individuels (5), et étant collées au matériau de filtre (2) au niveau de points de contact (6), ce qui permet d'obtenir une stabilisation des plis nettement plus simple et simultanément meilleure.
PCT/EP2015/057568 2014-04-15 2015-04-08 Élément de filtre WO2015158581A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014207252.2 2014-04-15
DE102014207252.2A DE102014207252A1 (de) 2014-04-15 2014-04-15 Filterelement

Publications (1)

Publication Number Publication Date
WO2015158581A1 true WO2015158581A1 (fr) 2015-10-22

Family

ID=52823627

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/057568 WO2015158581A1 (fr) 2014-04-15 2015-04-08 Élément de filtre

Country Status (2)

Country Link
DE (1) DE102014207252A1 (fr)
WO (1) WO2015158581A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5814219A (en) * 1995-04-21 1998-09-29 Donaldson Company, Inc. Pleated filter having a planar sheet of randomly arranged filaments to maintain pleat spacing
US20040163372A1 (en) * 2003-02-25 2004-08-26 Nguyen Ledu Q. Environmentally friendly air filter for an internal combustion engine
EP1862206A1 (fr) * 2006-05-29 2007-12-05 Mann+Hummel Gmbh Elément de filtre destiné au nettoyage d'un fluide
US20080016836A1 (en) * 2004-03-17 2008-01-24 Nordic Air Filtration A/S Method Of Manufacturing A Filter Element

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3692184A (en) * 1970-10-07 1972-09-19 Carborundum Co Filter cartridge and pack therefor and method of making same
DE19800683B4 (de) * 1998-01-10 2005-02-24 Inatec Innovative Auftragstechnologie Gmbh Verfahren und Vorrichtung zum kontinuierlichen Auftragen eines Klebstoffes auf die Kanten von faltenförmigen Filtermaterialien, sowie damit hergestellte Filter
DE202004003326U1 (de) 2004-03-01 2004-08-12 Mann + Hummel Gmbh Filterelement zur Reinigung eines Fluides

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5814219A (en) * 1995-04-21 1998-09-29 Donaldson Company, Inc. Pleated filter having a planar sheet of randomly arranged filaments to maintain pleat spacing
US20040163372A1 (en) * 2003-02-25 2004-08-26 Nguyen Ledu Q. Environmentally friendly air filter for an internal combustion engine
US20080016836A1 (en) * 2004-03-17 2008-01-24 Nordic Air Filtration A/S Method Of Manufacturing A Filter Element
EP1862206A1 (fr) * 2006-05-29 2007-12-05 Mann+Hummel Gmbh Elément de filtre destiné au nettoyage d'un fluide

Also Published As

Publication number Publication date
DE102014207252A1 (de) 2015-10-15

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