EP1720693A1 - Dispositif de filtrage d'un fluide, en particulier d'une matiere plastique fluidifiee - Google Patents

Dispositif de filtrage d'un fluide, en particulier d'une matiere plastique fluidifiee

Info

Publication number
EP1720693A1
EP1720693A1 EP04790031A EP04790031A EP1720693A1 EP 1720693 A1 EP1720693 A1 EP 1720693A1 EP 04790031 A EP04790031 A EP 04790031A EP 04790031 A EP04790031 A EP 04790031A EP 1720693 A1 EP1720693 A1 EP 1720693A1
Authority
EP
European Patent Office
Prior art keywords
channel
filter
fluid
discharge
bolt
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.)
Withdrawn
Application number
EP04790031A
Other languages
German (de)
English (en)
Inventor
Harald Pohl
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Maag Pump Systems GmbH
Original Assignee
Maag Pump Systems Textron 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 Maag Pump Systems Textron GmbH filed Critical Maag Pump Systems Textron GmbH
Publication of EP1720693A1 publication Critical patent/EP1720693A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/69—Filters or screens for the moulding material
    • B29C48/691—Arrangements for replacing filters, e.g. with two parallel filters for alternate use
    • B29C48/6912—Arrangements for replacing filters, e.g. with two parallel filters for alternate use the filters being fitted on a single rectilinearly reciprocating slide
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion

Definitions

  • the present invention relates to a device for filtering a fluid, in particular for filtering a liquefied plastic, with the features of the preamble of patent claim 1 and a corresponding filter arrangement with the features of the preamble of patent claim 17.
  • thermoplastic liquefied plastics In order to filter fluids and in particular to filter thermoplastic liquefied plastics, it is known to use devices of different designs.
  • DE 196 12 790 C describes a corresponding device for filtering a fluid, two plate-like filters arranged in pairs in the flow path of the fluid to be filtered and transversely to its flow direction being provided between a fluid supply channel and a fluid discharge channel slidable bolt, which is arranged in a corresponding housing fluid-tight, are mounted.
  • both plate-like filters are flowed through, so that accordingly both plate-like filters are available for filtering.
  • the Device furthermore the possibility of bringing the bolt into a second position by axially displacing it, in this second position a filter filtering the fluid and the second filter being flowed through in the opposite direction to the flow during filtering, so that dirt particles from the Surface of the second filter can be detached and removed to the outside.
  • this second position which is also referred to as the cleaning position or regeneration position
  • DE 35 27 173 C proposes a filter device which has at least two bolts which are axially displaceable independently of one another in a housing, each bolt being provided with two plate-like filters in each case. It is possible in the known device to bring about a further position of the plate-like filters by axially displacing the bolts independently of one another next to the filtering position (first position), in which all four plate-like filters filter the fluid, in this further one Position of the plate-like filter, a filter can be arranged outside the housing, so that this one filter must be replaced accordingly, while the other three remaining filters filter the fluid at this time.
  • a backwashing position in which a plate-like filter opposite to the flow direction during filtering is cleaned with a partial flow of the filtered fluid during the ongoing filtering process, does not enable the device known from DE 35 27 173 C, so that in comparison to that of the device known from DE 196 12 790 C, a much more frequent replacement of the plate-like filter is required.
  • the device known from DE 35 27 173 C always requires two bolts, which on the one hand results in an increased space requirement in comparison to a filtering device with one bolt and on the other hand makes the filtering device considerably more expensive.
  • the present invention has for its object to provide a device for filtering the specified type, in particular a device for filtering liquefied, thermoplastic material, which enables permanent continuous operation with a particularly simple construction.
  • the device according to the invention for filtering a fluid in particular for filtering a liquefied and preferably also a thermoplastic, has at least one fluid supply channel and at least one fluid discharge channel, with at least two in the flow path of the fluid to be filtered and transverse to its flow direction between the fluid supply channel and the fluid discharge channel , plate-like filters arranged at a distance from one another are provided.
  • the at least two plate-like filters are supported by an axially displaceable bolt, which is located in a housing bore in the filter device.
  • the device is arranged fluid-tight, such that the at least two filters simultaneously between a first position in which the at least two filters filter the fluid and a second position in which at least one filter of the at least two filters opposite to the direction of flow of the fluid when filtering, a partial flow of the filtered fluid is flowed through and thereafter this partial flow can be removed from the device to the atmosphere, while the other filter or filters filter or filter the fluid are movable.
  • the movement of the filter from the first position to the second position or vice versa is brought about in the device according to the invention by an axial displacement of the bolt.
  • a further axial displacement of the pin in the device according to the invention allows the at least two filters to be brought into a third position, in which third position at least one filter of the at least two filters is in an exchange position in which it is freely accessible from the outside while the at least one other filter is filtering the fluid.
  • the device according to the invention differs from the closest prior art according to DE 196 12 790 C in that in the third position, ie the exchange position, at least one filter is no longer covered by the device housing and is therefore freely accessible from the outside is, so that this at least one filter can be replaced and replaced by a fresh, unloaded filter, while at this time, ie in this current position (third position) of the axially displaceable bolt, the fluid to be filtered continuously flows through the at least one other filter is, so that an interruption of the filtering process in the device according to the invention does not take place even if a filter is replaced and replaced by an unloaded, fresh filter, which is not possible in the state of the art according to DE 196 12 790 C mentioned at the beginning or in the prior art according to DE 35 27 173 C always requires at least two bolts, each with at least two filters arranged in pairs.
  • the terms used here upstream and downstream always denote those positions which are located in the flow direction of the fluid to be filtered.
  • the term bolt not only includes the cylindrical bolt described in the previously cited prior art, but also covers those bolts which have a rectangular cross section, such cross-sectionally rectangular bolts also being referred to in the present field of art as flat slides which are axial are slidably and fluid-tight in a suitably adapted rectangular recess in the housing. Alignment in the sense of the present text means that there is in any case at least one flow connection for the fluid flowing through these channels between the channels which are aligned with one another.
  • the device according to the invention also allows filtering polymeric melts within predetermined pressure tolerance values, since if a predetermined pressure rise upstream of the 5 plate-like filters is exceeded, either the relevant plate-type filter is transferred to the second position and thus an automatic regeneration thereof or this plate-like filter is moved into its third position so that it can be exchanged for a new, uri-soiled filter,
  • Device according to the invention depending on the speed of the axial displacement of the bolt, is particularly easily possible to prevent considerable pressure surges in the polymer melt, such pressure surges easily leading to an undesirable chemical or physical change in the polymer melts, particularly in the case of sensitive materials . Because of the compact design of the device according to the invention, it can be used due to a limited space requirement, so that it can also be replaced easily and without great effort by conventional filtering devices.
  • a first, particularly advantageous development of the device according to the invention provides that a supply of the fluid to be filtered to at least one filter and... Over the entire axial sliding distance of the one bolt between the first position, the second and the third position a guide of filtered fluid downstream of one filter is ensured.
  • the device according to the invention preferably has a housing that, seen in the flow direction of the fluid to be filtered, the fluid supply channel, followed by the housing bore, which is arranged essentially perpendicular to the flow direction of the fluid in the fluid supply channel and which receives the axially displaceable bolt, and subsequently has the fluid discharge channel, such an embodiment of the device according to the invention being characterized in particular by a simple construction which can be realized with few parts.
  • At least two filters arranged axially apart from one another are provided in the single, axially displaceable bolt.
  • a particularly inexpensive and simple and trouble-free embodiment of the device according to the invention provides that the only axially displaceable pin has only two filters arranged axially apart, this pin then relative to the housing from the first position axially into the second position and from the second position into the third position and vice versa, so that either filter filters the fluid to be filtered in the first position, in the second position a filter filters the fluid while the other filters are flowed through by a partial flow of the filtered fluid opposite to the direction of the filter flow and are thus cleaned (regenerated), or that one filter filters the fluid, while the other filter is at this time located outside the housing and is thus freely accessible, so that then an exchange of the other filt it can be done against an unloaded filter.
  • each filter is arranged in a cavity that extends through the bolt material and extends essentially at right angles to the bolt axis.
  • the positioning of each filter is provided so that the filter plane is approximately parallel to the axis plane of the bolt and preferably in the radial center thereof, so that the filter area is maximized accordingly, the filter in particular being designed as a circular filter surface.
  • locking elements are assigned to the filter, so that the filter is detachably held within the cavity.
  • a sandwich-like filter arrangement which comprises a retainer plate in the direction of flow of the fluid to be filtered, the plate-like filter, which can be arranged in one or more layers, and then a sieve plate, which simplifies the exchange offers to hold this sandwich-like filter arrangement detachably in the cavity.
  • each supply part channel and one discharge part channel are assigned to each filter, wherein in the first position of the bolt to be axially displaced, both supply part channels are aligned with the fluid supply channel and both discharge part channels are aligned with the fluid discharge channel, so that on the one hand in the first position (filtering position) via the fluid supply channel and the two, so that aligned supply subchannels, the fluid to be filtered can be fed to each filter and after filtration the filtered fluid can be removed from the device via the two discharge subchannels and the fluid discharge channel aligned therewith , In the second position (regeneration position) of the bolt, the supply subchannel is aligned with a filter and the discharge subchannel with the same filter the fluid supply channel or fluid discharge channel, while the discharge subchannel of the other filter is also connected to the common fluid discharge channel.
  • the other filter is not in flow connection with the fluid supply channel, but is only connected to a drain channel provided in the housing, so that part of the filtered fluid flows counter to the flow direction when filtering through the other filter and over the filter , Drain channel can be removed from the device.
  • L0 is sufficient for the other filter to be freed of adhering dirt particles and thus to be regenerated.
  • this embodiment has a further, essential advantage, which can be seen in the fact that at no time is the flow path of the fluid to be filtered from the fluid inlet channel to the fluid outlet channel interrupted, so that there is also no flow blockage in one of the previously listed three positions can occur and thus effective and simple risk of bursting on the extruder and / or on the device according to the invention is excluded.
  • feed part channels and the discharge part channels extend essentially in the direction of displacement of the bolt, such a development of the device according to the invention has a very compact design with a minimized length of the feed part channels and discharge part channels.
  • the feed sub-channels are each arranged at a radial distance from one another.
  • the term radial distance means that in particular one feed part channel or one discharge part channel is assigned to an upper edge area and the other feed part channel or the other discharge part channel is assigned to the lower edge area ,
  • the feed subchannels or the discharge subchannels are aligned parallel to the bolt axis, which means nothing else that the feed subchannels or discharge subchannels are positioned parallel to the axial displacement direction of the bolt and are designed as predominantly rectilinear channels.
  • a structurally very simple and therefore also inexpensive and with high precision embodiment of the device according to the invention proposes that the feed part channels and / or the discharge part channels are provided in the bolt.
  • the feed part channels and / or the discharge part channels are designed as cylindrical bores through the bolt material.
  • the supply part channels and / or the discharge part channels, preferably the supply part channels and also the discharge part channels are each formed as an axially extending recess in the bolt jacket, so that these are axial extending recesses with the inner wall of the housing bore then design the corresponding supply part channels and discharge part channels.
  • the respective axially extending recess are each formed as an axially extending recess in the bolt jacket, so that these are axial extending recesses with the inner wall of the housing bore then design the corresponding supply part channels and discharge part channels.
  • .5 subchannels are not only easy to manufacture but can also be cleaned very easily and unproblematically, since they are then freely accessible over their entire axial length when the bolt has been moved out of the housing bore so far that the housing no longer has the axially extending recesses from-
  • the fluid supply has a channel division in the region of the bolt, forming a first feed channel and a second feed channel, the number of feed channels depending on the number of feed subchannels. If, for example, the device according to the invention has three supply subchannels in a pin, the fluid supply channel in the area of the pin is divided accordingly into three supply channels, the angle of these supply channels relative to one another and in particular the angle ⁇ of the first supply channel relative to the second supply channel between 15 ° and 90 °, preferably between 30 ° and 60 °, varies. It was found here that if the aforementioned angles were observed, the fluid to be filtered, which was supplied via the fluid supply channel, was evenly distributed over the supply channels, so that, accordingly, all filters in the bolt were also supplied with a constant fluid volume flow.
  • the fluid discharge channel in the area of the bolt has a channel division with formation of a first discharge channel and one second discharge channel, the number of discharge channels corresponding to the number of filters, as explained above for the channel division of the fluid supply channel.
  • the angle ⁇ of the first discharge channel relative to the second discharge channel varies between 15 ° and 90 °, preferably between 30 ° and 60 °, these aforementioned angles ⁇ ensuring that on the one hand the filtered fluid can flow out uniformly in the first position of the bolt and in the second position of the bolt, a partial flow of the filtered fluid flows through the respective plate-like filter in the opposite direction to the flow direction of the fluid during filtration and can thereby remove dirt from this filter.
  • a fundamentally different embodiment of the device according to the invention provides that the fluid supply channel and / or the fluid discharge channel have a dovetail-shaped widening in the area of the bolt, the end region of the dovetail-shaped widening having a sealing surface the bolt jacket.
  • the end region of the dovetail-shaped expansion is adapted to the curvature of the bolt shell and lies on the bolt shell in a fluid-tight manner, so that the feed part channels or discharge part channels arranged at a radial distance are continuously fed with fluid to be filtered or fluid which has already been filtered, as a result of which Embodiment, the channel division of the fluid supply channel or the fluid discharge channel is replaced.
  • a dovetail-shaped widening of the fluid supply channel in the region of the bolt or a dovetail-shaped widening of the fluid discharge channel in the region of the bolt is particularly appropriate if the bolt is provided with more than two plate-like filters, so that the channel division of the fluid supply channel is then produced
  • the formation of a corresponding number of supply channels and / or the creation of the channel division of the fluid discharge channel, with the formation of a corresponding number of discharge channels can be omitted, which considerably reduces the design and the manufacturing outlay.
  • such a dovetail-shaped widening can be cleaned much more easily and unproblematically compared to a corresponding number of supply channels or discharge channels.
  • the pin has two plate-like filters, the device according to the invention having a fluid supply channel, preferably arranged in the housing, which in the area of the pin divides a channel to form a first supply channel and one two has th feed channel.
  • the first feed channel is aligned with a first feed part channel and the second feed channel with a second feed part channel, the first feed part channel opening into the cavity of a first filter and the second feed part channel opening into the cavity of the second filter.
  • Downstream of the first filter includes a first discharging sub-channel and downstream of the second filter is followed by a second • dissipation sub-channel, wherein the first discharge sub-channel in a first discharge channel and second discharge sub-channel in a second discharge channel open.
  • the first discharge channel and the second discharge channel then combine to form the common fluid discharge channel, as seen in the flow direction of the filtered fluid.
  • the fluid supply channel has a channel division in the region of the pin, forming the first supply channel and the second supply channel, the first supply channel being aligned with the first partial feed channel in the second position of the pin and the second feed channel is closed by the bolt. Furthermore, the first supply subchannel opens into the cavity of the first filter, the first discharge subchannel being connected downstream of the first filter and the second discharge subchannel being connected downstream of the second filter, such that the first discharge subchannel enters the first discharge channel and the second discharge subchannel into the second discharge channel open.
  • the first discharge channel and the second discharge channel combine to form the common fluid discharge channel, the space of the cavity located upstream of the second filter being aligned with a discharge channel through which a partial flow loaded with dirt particles detached from the second filter emerges from the housing and thus to the atmosphere is dissipatable.
  • the fluid supply channel has a channel division in the region of the pin, forming the first supply channel and the second supply channel, the first and second supply channels with the cavity of the first being in the third position of the pin Filters align.
  • the first and second discharge channels follow downstream of the first filter, the bolt in its third position projecting axially out of the housing bore to such an extent that the second
  • Filter which in this position of the bolt does not come into contact with fluid to be filtered or filtered fluid, is freely accessible from the outside, so that this second filter can be removed from the corresponding cavity and replaced by a correspondingly new or externally cleaned filter.
  • the present invention further relates to a filter arrangement for filtering a fluid, in particular for filtering a liquefied, preferably thermoplastic, with which it is possible to filter fluids without interruption over an unlimited production period.
  • the filter arrangement according to the invention for filtering a fluid in particular for filtering a liquefied, preferably thermoplastic, provides that the filter arrangement has at least two, preferably two to six, devices according to the invention, as described in detail above, the fluid supply channels and the fluid discharge channels of the at least two devices according to the invention are combined into a single fluid feed channel and into a single fluid discharge channel.
  • the filter arrangement according to the invention has all the advantages as described at the beginning for the device according to the invention.
  • the filter arrangement according to the invention allows a continuous, permanent and uninterrupted filtering of fluids, preferably a filtering of liquefied plastics, since each individual device is designed in such a way that uninterrupted filtering is ensured even if a plate-like filter is in pairs in a bolt arranged plate-like filter is backwashed (regenerated) with a partial flow of filtered fluid in the second position of the respective bolt or if a filter of the filters arranged in pairs in the bolt is positioned in the third position of the bolt outside the housing and is replaced there with a new filter ,
  • a particularly space-saving embodiment provides a development of the filter arrangement according to the invention described above, in which two to six devices according to the invention are arranged in a common housing.
  • the filter arrangement according to the invention has all the advantages, as are detailed in the above description for the device according to the invention, so that reference is made to avoid repetition.
  • Figure 1 is a perspective front view, ie a view from the upstream side of the embodiment of the device according to the invention, with the housing partially removed;
  • Figure 2 is a rear perspective view, i.e. a view from the outflow side, of the pin shown only partially in Figure 1 in its first position (filtering position);
  • Figure 3 is a front perspective view, i.e. a view from the upstream side, of the pin only partially shown in Figure 1 in its first position (filtering position);
  • FIG. 4 shows a perspective front view (inflow side) of the bolt in a second position (regenerator position), in which a plate-like filter filters the fluid while the other plate-like filter is backwashed;
  • Figure 5 is a rear perspective view (outflow side) of the pin in the second position (regenerator position) in which a plate-like filter filters the fluid while the other plate-like filter is backwashed;
  • Figure 6 is a front perspective view (upstream side) of the pin in a third position (replacement position) in which a plate-like filter filters the fluid while the other plate-like filter is being replaced;
  • FIG. 7 shows a perspective rear view (outflow side) of the bolt in the third position (replacement position), in which one plate-like filter filters the fluid while the other plate-like filter is replaced.
  • FIG. 1 shows a perspective front view of the device, generally designated 1, for filtering a fluid, in particular for filtering a liquefied plastic, the device 1 having a housing 2, which extends from the inlet opening of a common fluid supply channel 3 to the outlet opening of a common one Fluid discharge channel 4 extends, the housing 2 covering the fluid discharge channel 4 in FIG. 1, since the common fluid discharge channel 4 is positioned on the rear side of the housing 2.
  • the housing 2 is provided with a cylindrical housing bore 7, in which a bolt 8 is arranged in a fluid-tight manner, the bolt 8 in the axial direction, i.e. in the direction of arrow 19 and vice versa, is displaceable such that the bolt 8 can assume a first position (filtering position), a second position (regeneration position) and a third position (replacement position).
  • the bolt 8 is preferably assigned hydraulic elements (not shown) which position the bolt 8 exactly in the three positions mentioned above.
  • this fluid to be filtered is first fed to the device 1 via the fluid feed channel 3, the fluid feed channel 3 being in a first feed channel 15 and a second feed channel 16 divides.
  • These two supply channels 15 and 16 are arranged at an angle ⁇ , which in the embodiment shown is approximately 50 °.
  • the fluid to be filtered passes from the first feed channel 15 into the first feed subchannel 12 and from the second feed channel 16 into the second feed subchannel 11, whereby these two feed sub-channels 11 and 12 are each formed as an axially extending recess in the bolt casing of the bolt '. 8 Together with the inner wall of the housing bore 7, these two recesses, which are positioned at a radial distance from one another, form the first and second supply subchannels 12 and 11, the first supply subchannel 12 being only partially recognizable in FIG. 1, while FIG. 3 shows these two openings - Fully maps channels 12 and 11.
  • the cavities 9 and 10 in the embodiment shown, in each case as a cylindrical through-hole, which is vertical runs to the axis of the bolt 8, is formed and serves to receive the plate-like filters 5 and 6. Only the right-hand plate-like filter 5 is shown in FIG. 1, and only the corresponding cavities 9 and 10 are shown in FIG. 2, but not the plate-like filters 5 and 6 themselves.
  • the fluid to be filtered passes through the plate-like filters 5 and 6 (not shown) and is therefore present as a filtered fluid.
  • the filtered fluid then flows from the area of the cavities 9 and 10 located downstream of the filters 5 and 6 into the first discharge part channel 13 and into the second discharge part. channel 14, wherein the first discharge duct 13 is assigned to the filter 6 and the second discharge duct 14 to the filter 5.
  • These two discharge subchannels 13 and 14 open into the first discharge channel 18 and the second discharge channel 17, respectively.
  • the first and second discharge channels 18 and 17 in turn combine in the flow direction of the now filtered fluid in the fluid discharge channel 4.
  • the first discharge channel 18 is arranged relative to the second discharge channel 17 in the embodiment shown in FIG. 2 at an angle ⁇ of approximately 50 °.
  • the two discharge subchannels 13 and 14 are each formed as an axially extending recess in the bolt jacket, so that these cutouts together with the inner walls of the housing bore 7 the respective discharge subchannel 13 or 14 train.
  • Figures 1 to 3 show the device 1 in the first position of the bolt 8 which can be displaced axially in the direction of arrow 19 and vice versa, ie in this first position both plate-like filters 5 and 6 are used for filtering the fluid and in particular for filtering the liquefied one
  • the liquefied plastic is supplied by means of an extruder which is arranged upstream of the fluid supply channel 3 and whose outlet opens into this fluid supply channel 3, while the filtered fluid, in particular the liquefied plastic, is fed via the fluid discharge channel 4 ( Figure 2) removed from the device 1 and from there, for example, to a nozzle or to a tool (not shown).
  • FIGS. 4 and 5 depict the bolt in its second position (regeneration position), the second position being opposed by a displacement of the bolt 8 to the direction of arrow 19 (FIG. 1).
  • the first feed channel 15 is closed fluid-tight at the end by a section of the bolt 8, so that accordingly the fluid feed via the first feed subchannel 12 and thus to the left-hand plate-like filter 6 is interrupted.
  • this axial displacement of the bolt 8 from its first position into the second position brings the space of the cavity 10 upstream of the plate-like filter 6 into communication with a drain channel 20, the drain channel 20 protruding from the housing 2 and opening into the atmosphere ,
  • the inflow of fluid to be filtered takes place via the fluid feed channel 3, the second feed channel 16 and the second feed subchannel 11, so that the fluid to be filtered flows through the plate-like filter 5, as can be seen from FIG.
  • the now filtered fluid passes from the area of the cavity 9 via the second discharge subchannel 14 into the second discharge channel 17, a partial flow of filtered fluid due to the back pressure prevailing in the fluid discharge channel 4 (caused by a nozzle or a tool that follows it) ) via the first discharge duct 18 and the associated first discharge part duct 13 into the area of the cavity 10 downstream of the plate-like filter 6 arrives and from there flows through the plate-like filter 6 (opposite to the flow direction when filtering), whereby the dirt accumulated on the plate-like filter 6 is rinsed off, so that a partial flow of the fluid loaded with rinsed dirt particles is then discharged to the atmosphere via the discharge channel 20 can. This in turn effects the appropriate cleaning (regeneration) of the plate-like filter 6.
  • the bolt can also be brought from the first position (filtering position) shown in FIGS. 1 to 3 (filter position), in which both plate-like filters filter the fluid, by axially displacing the bolt 8 in the direction of arrow 19 into a position in which the Fluid supply to the plate-like filter 5 is interrupted because the end region of the second supply channel 16 is closed in a fluid-tight manner by a bolt section. Since in this position the rear fluid outflow from both cavities 9 and 10 is connected in an analogous manner, as described above, a partial flow of filtered fluid is supplied to the downstream region of the cavity 9 in the opposite direction to the flow during filtration. This partial flow flows through the filter 5 in the opposite direction to the filtering direction, so that corresponding dirt particles are detached therefrom. The partial flow laden with dirt is then removed from the device via a discharge duct constructed identically to the discharge duct 20, but which is assigned to the filter 5.
  • Figures 1 to 3 which show the bolt 8 in a filtering position (first position) and in contrast to Figures 4 and 5, which show the bolt 8 in a second position (regeneration position), Figures 6 and 7 form the bolt 8 in a third position (replacement position), the third adjusting by a further displacement of the bolt 8 opposite to the direction of arrow 19 (Figure 1) was brought about.
  • the first feed channel 15 is closed fluid-tight at the end by a section of the bolt 8, so that the fluid feed to the first feed subchannel 12 and thus also to the left-hand plate-like filter 6 accordingly is interrupted.
  • this axial displacement of the bolt 8 from its first or second position to the third position displaces the cavity 10 and the plate-like filter 6 held therein so far out of the housing 2 that the plate-like filter 6 is freely accessible and against an unused filter can be exchanged.
  • the inflow of fluid to be filtered takes place via the fluid feed channel 3, the second feed channel 16 and the second feed subchannel 11, so that the fluid to be filtered flows through the plate-like filter 5, as can be seen from FIG.
  • the now filtered fluid passes from the area of the cavity 9 via the second discharge duct 14 into the second discharge duct 17 and from there into the fluid discharge duct 4, while the first discharge duct 18 is closed in a fluid-tight manner by a section of the bolt 8.
  • the first discharge subchannel 13 also does not establish a fluid connection to the cavity 10, so that no partial flow of filtered fluid can be supplied to this cavity here either.
  • the bolt 8 can also be moved from the first position (filtering position) shown in FIGS. 1 to 3 or from the second position (regeneration position) shown in FIGS. 4 and 5 by an axial displacement of the bolt 8 in the direction of arrow 19 into a third Bring position in which the fluid supply to the plate-like filter 5 is interrupted, wherein the filter 5 then protrudes so far from the housing that it can be replaced. Since in this position the rear fluid drainage only takes place via the discharge duct 13 and the first discharge channel 18 to the fluid discharge channel 4, there is no longer any fluid connection to the rear side of the plate-like filter 5, so that this filter 5 can be exchanged safely.
  • the filtered fluid is guided into one of the two discharge channels via one of the two discharge subchannels.
  • the filtered fluid it is of course also possible for the filtered fluid to be fed from one of the two cavities downstream of the relevant filter directly into the associated discharge channel 17 or 18, or for the fluid to be filtered to be passed directly from one of the two supply channels or from both supply channels, bypassing the partial feed channels the cavity or cavities upstream of the filter or filters is supplied.

Landscapes

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

Abstract

L'invention concerne un dispositif de filtrage d'un fluide qui comporte au moins un canal d'entrée de fluide et au moins un canal de sortie de fluide, au moins deux filtres sous forme de plaques étant placés à une certaine distance l'un de l'autre sur la trajectoire d'écoulement du fluide à filtrer et transversalement à son sens d'écoulement entre le canal d'entrée de fluide et le canal de sortie de fluide, lesquels filtres sont logés dans un axe à déplacement axial, placé dans un alésage de boîtier de façon étanche au fluide. Ces filtres peuvent passer simultanément d'une position de filtrage à une position de régénération et inversement. Un déplacement axial de l'axe (8) permet d'amener les deux filtres (5, 6) dans une troisième position, où au moins un filtre (5 ou 6) se trouve dans une position de remplacement, dans laquelle ce filtre est librement accessible de l'extérieur, tandis que l'autre filtre (6 ou 5) continue à filtrer le fluide.
EP04790031A 2004-03-03 2004-10-22 Dispositif de filtrage d'un fluide, en particulier d'une matiere plastique fluidifiee Withdrawn EP1720693A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004010968A DE102004010968B4 (de) 2004-03-03 2004-03-03 Vorrichtung zum Filtrieren eines Fluids, insbesondere eines verflüssigten Kunststoffes
PCT/DE2004/002358 WO2005084917A1 (fr) 2004-03-03 2004-10-22 Dispositif de filtrage d'un fluide, en particulier d'une matiere plastique fluidifiee

Publications (1)

Publication Number Publication Date
EP1720693A1 true EP1720693A1 (fr) 2006-11-15

Family

ID=34894989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04790031A Withdrawn EP1720693A1 (fr) 2004-03-03 2004-10-22 Dispositif de filtrage d'un fluide, en particulier d'une matiere plastique fluidifiee

Country Status (3)

Country Link
EP (1) EP1720693A1 (fr)
DE (1) DE102004010968B4 (fr)
WO (1) WO2005084917A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114103053A (zh) * 2021-10-28 2022-03-01 江苏艾斯瑞特机械有限公司 便于清理的免换网自动过滤单螺杆双阶挤出机

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010029591B4 (de) 2010-06-01 2012-11-22 Kreyenborg Verwaltungen Und Beteiligungen Gmbh & Co. Kg Filtereinrichtung für hochviskose Medien
DE102014016634A1 (de) * 2014-11-11 2016-05-12 Maag Pump Systems Gmbh Filtriervorrichtung zum Filtrieren eines Fluids

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527173C1 (de) * 1985-07-03 1986-09-11 Kreyenborg Verwaltungen und Beteiligungen KG, 4400 Münster Filtereinrichtung für Strangpressen und Spritzgießmaschinen
US4701118A (en) * 1985-07-03 1987-10-20 Kreyenborg Verwaltungen Und Beteiligungen Kg Apparatus for filtering plasticized materials in extruders
US4814186A (en) * 1988-02-29 1989-03-21 Beringer Co., Inc. Polymer filtration apparatus
JPH07186242A (ja) * 1993-12-27 1995-07-25 Japan Steel Works Ltd:The スクリーンパック交換装置
EP0707878B1 (fr) * 1994-10-19 2000-01-19 BemaTec SA Dispositif de filtre avec lavage à contre-courant
DE19612790C2 (de) 1996-03-29 2002-05-08 Maag Pump Systems Textron Gmbh Vorrichtung zum Filtrieren eines Fluids
ATE354414T1 (de) 2002-09-17 2007-03-15 Kreyenborg Verwaltungen Vorrichtung zum filtrieren eines fluids, insbesondere für kunststoffverarbeitende anlagen
DE10254022B4 (de) * 2002-09-17 2004-07-29 Kreyenborg Verwaltungen Und Beteiligungen Gmbh & Co. Kg Vorrichtung zum Filtrieren eines Fluids, insbesondere für kunststoffverarbeitende Anlagen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005084917A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114103053A (zh) * 2021-10-28 2022-03-01 江苏艾斯瑞特机械有限公司 便于清理的免换网自动过滤单螺杆双阶挤出机

Also Published As

Publication number Publication date
DE102004010968B4 (de) 2013-03-28
DE102004010968A1 (de) 2005-09-29
WO2005084917A1 (fr) 2005-09-15

Similar Documents

Publication Publication Date Title
EP0672443B1 (fr) Dispositif de contrÔle et de filtration d' au moins deux courants partiels de fluide
WO2004026432A1 (fr) Dispositif pour filtrer un fluide, notamment dans des installations de transformation de matieres plastiques
WO2013152830A1 (fr) Dispositif permettant de filtrer une matière thermoplastique fondue
WO2016131072A2 (fr) Filtre à bande
DE69900707T2 (de) Vorrichtung zur Filtrierung von flüssigem Kunststoffmaterial
DE102014016634A1 (de) Filtriervorrichtung zum Filtrieren eines Fluids
DE19519907C2 (de) Siebwechselvorrichtung für kunststoffverarbeitende Anlagen
EP1556202B1 (fr) Dispositif filtrant a lavage a contre-courant pour matiere en fusion et organe de distribution pour un tel dispositif filtrant
DE19636067A1 (de) Filtervorrichtung zur Filtration von Kunststoffschmelze
EP0540546B1 (fr) Dispositif de filtration pour matiere thermoplastique
EP1082205B1 (fr) Dispositif de filtration pour extrudeuses et machines a mouler par injection
EP0707878A1 (fr) Dispositif de filtre avec lavage à contre-courant
DE19612790C1 (de) Vorrichtung zum Filtrieren eines Fluids
EP0919353B1 (fr) Appareil de filtration d'un courant de fluide et un module de filtration à utiliser avec ledit appareil
DE10151496B4 (de) Filtereinrichtung mit Filterrotor, speziellen Filterelementen und permanenter Rückspülung der Filterelemente sowie einer Spülschmelzeregulierung mittels Spülventil
DE10116408C1 (de) Vorrichtung zum Filtrieren einer Flüssigkeit, insbesondere zum Filtrieren einer polymeren Kunststoffschmelze
DE102004010968B4 (de) Vorrichtung zum Filtrieren eines Fluids, insbesondere eines verflüssigten Kunststoffes
WO2005087476A2 (fr) Dispositif de filtrage d'un fluide, notamment de filtrage d'un plastique liquefie
DE10254022A1 (de) Vorrichtung zum Filtrieren eines Fluids, insbesondere für kunststoffverarbeitende Anlagen
DE19500060C1 (de) Filtereinrichtung für Strangpreß- und Spritzgießmaschinen
EP0581153B1 (fr) Filtre à arête
EP0875357A1 (fr) Filtre pour extrudeuses et presses d'injection
DE19834302C2 (de) Filtereinrichtung für Strangpressen und Spritzgießmaschinen
EP1524022B1 (fr) Dispositif de filtration de liquide, notamment pour des installations de transformation de matières plastiques
DE2403765A1 (de) Siebvorrichtung fuer die reinigung schmelzfluessigen kunststoffs

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20060327

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR

DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20111103

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

INTG Intention to grant announced

Effective date: 20130521

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MAAG PUMP SYSTEMS GMBH

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20131001