DE1729534A1 - Filter device for plastic processing machines - Google Patents

Description

PATENTANWALT DIPL- 1 N G. "VI E IfKUI TtK

HOHENZOLLERNRING 2-10 (CONCORDIAHAUS) - TELEPHONE 212593

January 5, 1968 V / B SA 671

Jan Birger Olsen »Oberlar / Treisdorf

filter device for Kunatoffverbeitunganaachinen

The invention relates to filter devices for plastics processing machines, in particular extruders or Granuliermasohinen, and aims to get one filter device that can be cleaned easily and thoroughly without having to carry out cleaning work by hand, as they are required in the sails, if two or more filter units are provided that change

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wise to a resting or cleaning position outside of the working position position can be moved, in which they can be removed and cleaned.

For this purpose, the invention provides for a filter device of the type mentioned for plastic processing machines with at least two filter units that can be brought from a working position into a rest or cleaning position, since each filter unit moves from its working position into a cleaning position while at the same time switching on another filter unit in its place can be brought, in which it is in series with the newly switched-on filter unit with reversed flow direction and is in connection with a cleaning or emptying line or opening Here, the filter units can be inserted into the passage channels of a filter carrier, the position of which is opposite to the supply , Filter device housing contained discharge and cleaning lines can be changed, whereby the passage channels come in connection with the corresponding lines _{0 in} order to be able to easily change its position in the housing be formed on an insert piece rotatable in the filter device housing or an insert piece displaceable therein.

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The filter support can, however, also be in the filter device housing be displaceable and also rotatably arranged. The necessary connections of the filter units with the various lines can be made more advantageous Way by provided in the filter device housing, in the various positions of the filter carrier Connection between its passage channels and the supply, Producing discharge and drainage lines Make connection channels ο You can also click the pressure difference Bwiaohen the two sides of the in Provide appropriate switching devices located in the working position filter unit, which when a set differential pressure a changeover of the filter device and switch on a cleaned filter unit

The invention invites the most diverse implementation possibilities. In the drawing, two embodiments are all examples with those that are essential for understanding Parts shown, namely showed

Fig. 1 the first embodiment with a rotatable filter carrier is a section along the line 1-1 of Fig. 2, Jig. 2 a »section along the line 2-2 of FIG. 1,

Fig. 5 Approximately reduced VaSetab a section according to FIG. 2 with the position changed Filter carrier,

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fig · 4 also one in a reduced scale Section approximately near line 4-4 of Figure 1 in the same Position of the filter yield »wla in fig. 3,

fig · 5 a wide filling shape with a « irerso slidable and rotatable filter carrier la ßohnitt approximately after the line 5-5 of fig 6,

flg. 6 a section along the line 6-6 of fig. 5, fig. 7 the same shape la Orundrifl and fig 8 and 9 schematized, the flg 5 and 6 corresponding representations on veraneehauliohung the working method

In the execution form according to flg. 1 to 4, in an approximately cylindrical filter housing 11 essentially also sylndrisoher filter carrier 12 rotatably arranged · The body 11 is connected to a supply line 13 and a discharge line 14 and has an emptying or cleaning opening 15 in its base 111. The filter carrier 12 is made with SWAI see crawling Passage channels 16 and 17 are provided, the cross-sections of which taper from the inlet side to the AualaB side, including one Adaptation to the cross sections of the supply line 19 and Drain line 14 excluded. Aa the linlaflseite Jefea Durohlaflkanals 16 BSW · 17 is «iat filter unit 10 BSW.

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Finally, two connecting channels 20 and 21 are arranged in the side walls of the housing 11, which lead from the level of the passage channels 16, 17 to the level of the base 111 and can be brought into connection there with channels 22 and 23 arranged on the underside of the filter support which lead to the cleaning opening 15 ₀

In the working position according to Figo 1 and 2 that is Filter 18 brought in through the feed line 13 Mass flow switched, which after its passage through the filter through the passage 16 of the filter carrier 12 is led to the drainage line.Have you now collected so much dirt on the filter 18 that that a bow is necessary, becomes the filter bearer from the position according to Flg. 2 brought into the position according to Fig. 3 and 4 · In this position is the clean The filter 19 is connected to the feed line 13, while the filter 13 is in front of the connecting channel 20. The mass entering through the filter 19 into the Durohlaßkanal 17 is, since the line H is blocked, on the filter steered in Durohlaßkanal 16 and flows through this in the opposite direction Direction. Here, the accumulated dirt is loosened in a short time and transferred to the mass flowing through

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the connecting channel 20, the channel 22 of the filter carrier and the opening 15 conveyed to the outside. As soon as the a has happened, the filter carrier can be rotated from the cleaning position into the great working position of the filter 19 be, in which the Durohlaßkanal 17 with the line 14 in The connection is established and channel 20 is blocked. Should then the filter 19 are cleaned, it is the connection

21 / Kanal' gegentberosed so that the plastic mass through the cleaned filter 18 and in reverse the filter 19 through through the channels 21 and 23 to Cleaning opening 15 can flow before this filter 18 full again to be brought to work «

In the embodiment according to FIGS. 5 to 9, the housing is formed from a cuboid block 31 with a cylindrical opening into which a sleeve 32 is inserted, which aleo forms part of the housing. The subdivision has no functional, but manufacturing reasons. A filter support 33 is slidably seated in this housing 31, 32 and is rotatable about its aohae and the discharge line 39 to bring ₀

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In the position of the filter carrier shown in FIGS. 5, 6 and 7, the plastic flows through the supply line 38 and the filter 36 in the operating position in the thermoset duct 34 to the discharge line 39 o let the filter unit 36 become heavily soiled and in need of cleaning, the filter carrier 33 in FIG. 5 swiveled counterclockwise by about 30 ° to 45 °, ao da3 the outlet opening ^ uer passage channels 34 and 35 come to lie in front of the connecting line forming senses 40 in the sleeve 32, and beyond that in the axial direction ao far pushed _e to the Durohlaßkanal 35 comes with the filter in connection with the supply line 38. The passage 34 is in connection with the drainage duct 41. The mass flowing in through the line 38 then flows via the filter 37 of the passage 35 and the connecting line 40 in the opposite direction to the working direction through the filter 36, loosing the accumulated dirt there leads it through the line 41 to the outside. Thereafter, the filter carrier 33 only needs to be pivoted clockwise in order to bring the filter 37 fully into its working position. To clean the filter 37, the processes described then take place accordingly when the filter carrier is shifted in the opposite direction

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from 80 that the Durohlaßkanal 35 with the cleansing filter 37 is placed in front of the emptying line 42 The flow of the mass through the filter device in this position is illustrated in flg. 8 and 9 by arrows

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Claims (1)

Claims 1J filter device for plastics processing machines, in particular extruders and granulating machines, with at least two optionally from one working position filter units that can be brought into a rest or cleaning position, characterized in that each filter unit from its working position with simultaneous Einachalten Another filter unit can be brought into a cleaning position in its place »in which it can be reversed The direction of flow is in series with the newly switched on filter unit and with a cleaning or emptying line or opening ο 2. Filter device according to claim 1, characterized in that the filter units in Durohlaßkanäle of a filter carrier are used, the position of which can be changed in relation to a filter unit housing containing the supply, discharge and cleaning lines is, the passage channels in connection with the corresponding Lines come. 3 · Filter device according to claim 1 or 2, daduroh marked that the filter carrier is from one in the filter * device housing rotatable EinaatzetUok is formed o - 10 - 009884/1792 - ίο - 4 · Filter device according to claim 1 or 2, characterized characterized in that the filter carrier of a Kinsatastttok slidably arranged in the filter device housing is educated » 5. Filter device according to claim 1 or 2, characterized in that the filter carrier in the Filtereinriohtunga « housing is slidable and rotatable 6 «Filter device according to one or more of the Claims 1 to 5, characterized by provided in the filter device housing in the various positions smell the connection of the filter carrier, its passage channels and the connecting channels producing the supply, discharge and cleaning lines 7 · Filter device according to one or more of claims 1 to 6, characterized by the pressure difference between the two rare in the working position the filter unit is responsive switching devices, when a set differential pressure is exceeded a changeover of the filter device and switching on trigger a cleaned filter unit ο 009884/1792 Blank page