Abstract

The invention relates to a filtering device for highly viscous fluids, having at least two parallel screen plungers which are arranged in a displaceable fashion in screen plunger bores of a housing and which have in each case at least one screen cavity in which at least one filter element is arranged, wherein the housing has an inflow opening from which, on the untreated side, at least one flow duct leads to each screen plunger bore, and the housing has at least one flow duct which, on the clean side, leads from each screen plunger bore to an outflow opening. On the untreated side and/or on the clean side, in each case one common flow duct leads rectilinearly along both screen plunger bores and, in a production position, tangentially intersects the screen cavities.

IPC Classes  ?

• B01D 33/01 - Filters with filtering elements which move during the filtering operation with translationally moving filtering elements, e.g. pistons
• B29C 47/68 - Filters
• B29C 47/00 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor (extrusion blow-moulding B29C 49/04)

Abstract

The invention relates to a filtering device (100) comprising: a filter support element (10) which is movably mounted in the housing (30), which has the shape of a cylindrical bolt, and which has multiple filter chambers (11.1, 11.2; 12.1, 12.2), a filtering element being arranged in each said filter chamber; and an inlet channel (31.1, 31.2 32.1, 32.2) and an outlet channel (41.1, 41.2; 42.1, 42.2) in the housing (30), wherein the inlet channel and the outlet channel are each to be connected to at least one filter chamber in a production position. The aim of the invention is to increase the effective filtering surface. This is achieved in that at least two pairs of filter chambers are provided on the filter support element. The filter chambers of each pair are arranged on the filter support element in a diametrically opposed manner, and there are no connections between the filter chambers within the filter support element. At least one respective intermediate channel (13.1, 13.2, 14.1, 14.2) that extends in the direction of the longitudinal axis (19) of the filter support element (10) is provided between the outlet channels in the housing and the filter chambers. Intermediate channels of different lengths are provided for each pair of filter chambers.

IPC Classes  ?

• B29C 47/68 - Filters
• B29C 47/08 - Component parts, details or accessories; Auxiliary operations

Abstract

The invention relates to a filtering device (100) for highly viscous fluids, having at least two parallel screen plungers (11, 11') which are arranged in a displaceable fashion in screen plunger bores of a housing (10) and which have in each case at least one screen cavity (13; 13') in which at least one filter element (14, 14') is arranged, wherein the housing (10) has an inflow opening (21) from which, on the untreated side, at least one flow duct (22) leads to each screen plunger bore, and said housing has at least one flow duct (32) which, on the clean side, leads from each screen plunger bore to an outflow opening (31). On the untreated side and/or on the clean side, in each case one common flow duct (22, 32) leads rectilinearly along both screen plunger bores and, in a production position, tangentially intersects the screen cavities (13; 13').

IPC Classes  ?

• B01D 29/01 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with flat filtering elements
• B01D 29/52 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
• B01D 35/12 - Devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration
• B29C 47/68 - Filters
• B01D 29/66 - Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps

Abstract

The invention relates to a filtering device (100) for high-viscosity fluids, having a partial channel (34) in the housing (30) and a displacing piston (40), which can be inserted into the partial channel (34, 35). The displacing piston (40) comprises at least one inner fluid line (42), which extends from an inlet opening (41) to an outlet opening (43) on the circumference. The outside diameter of the displacing piston (40) corresponds to the inside diameter of the partial channel (34, 35). The displacing piston (40) can be positioned in a production position with the outlet opening (43) of said displacing piston in front of the opening of the discharge channel (33) into the partial channel (34, 35) and can be pulled back to a backflushing initial position within the partial channel (34), wherein along a backflushing displacement path, the opening of the discharge channel (33) into the partial channel (35) is covered by the outer wall of the displacing piston (40) and/or the outlet opening (43) of the displacing piston (40) is covered by the inner wall of the partial channel (34).

IPC Classes  ?

• B01D 29/01 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with flat filtering elements
• B01D 29/52 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in parallel connection
• B01D 29/66 - Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps

Abstract

The invention relates to a filter element (100) for filtering a fluid comprising at least: a first clamping ring (10) and an outer ring (14), a first filter disk (30), a first inner supporting plate (40) provided with holes for supporting the first filter disk (30), which first inner supporting plate faces the outside or an inner flow channel (102); a second inner supporting plate (40) provided with holes; a second filter disk (30) arranged on the second supporting plate (40), and a second clamping ring (20), which is connected to the first clamping ring (10) by means of connecting elements (21). The filter disks (30) and the inner supporting disks (40) are arranged within a housing, which is formed by the clamping rings (10), at least one outer ring (14), and outer supporting plates (12, 22) provided with holes, which outer supporting plates each cover a respective filter disk (30) on the outside.

IPC Classes  ?

• B01D 29/41 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted transversely on the tube
• B29C 47/68 - Filters

Abstract

A filtering device (100) for highly viscous media comprises at least one screen plug (10) which is movably arranged in a screen plug bore (27) of a housing (20) and which has at least one screen cavity (11, 12), a filter element (11.7) lying in said screen cavity. The screen cavity (11, 12) narrows to a funnel section (11.6) in a rear region when viewed in the flow direction, said funnel section opening into at least one screen plug outlet channel that opens upstream of the housing outlet channel (24, 25) in the production position. According to the invention, the screen plug outlet channel comprises an inlet zone (11.1, 12.1), at least one deflecting point (11.3), and an outlet zone (11.2, 12.2). The intake zone (11.1, 12.1) extends from an edge region of the funnel section (11.6), and the outlet zone (11.2, 12.2) is designed as a groove that extends on the outer face of the screen plug (10; 10') and/or on the inner face of the screen plug bore (27).

IPC Classes  ?

• B29C 47/68 - Filters

Abstract

The invention relates to a screen carrier element (100) for a filtration device comprising at least one screen cavity (101), in which at least one filter unit (10) is to be disposed, and a support tube (15) having recesses (15.4) and a plurality of disk filter elements (11), each having a central hub (11.3) with which they are mounted on the support tube (15). A semi-permeable filter medium (11.1) surrounds the hub and is spread out to form a three-dimensional structure. At least one flow channel (11.4) extends in the hub element (11.5) from the main body enveloped by the filter medium (11.1) to the support tube (15), the support tube (15) opening into an outlet channel (102) of the screen carrier element (100). The invention also relates to a filtration device for filtering a fluid.

IPC Classes  ?

• B29C 47/68 - Filters
• B01D 29/41 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor with hollow discs side by side on, or around, one or more tubes, e.g. of the leaf type mounted transversely on the tube

Abstract

The invention relates to an arrangement and a device for filtering a fluid, particularly for plastic processing plants, wherein the pressure drop, or the flow rate reduction, created by the withdrawal of material from the process is sensitively balanced in that pressure constancy and flow rate constancy are achieved at the discharge duct (3).

IPC Classes  ?

• B29C 47/68 - Filters
• B29C 47/92 - Measuring, controlling or regulating