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Erema Engineering Recycling Maschinen Und Anlagen Gesellschaft M.b.h.

Krauss-maffei Austria Gesellschaft M.b.h.

Erema Engineering Recycling Und Anlagen Gesellschaft M.b.h.

Sunpor Technology A/s

Oesterreichische Schiffswerften Aktiengesellschaft

Wendelin, Georg

Schulz, Helmuth

Bacher, Helmut

Erema Engineering-recycling-maschinen-anlagen G.m.b.h.

Helmuth Schulz

Helmut Bacher

Georg Wendelin

Klaus Feichtinger

Manfred Hackl

Wolfgang Dreu

Günther Klammer

Gerhard Wendelin

The invention relates to a device for processing material by mixing and/or plasticating, comprising at least two conical screws () which are arranged next to each other in a common screw casing () and the flights of which engage with one another and are driven to rotate in the same direction of rotation about the respective screw axis () by at least one motor, with the material that is to be processed being fed to the screws () through at least one feed opening () in the screw casing () which is arranged in the feed zone (E) of one end face of the screws (), and with the material that has been processed by the screws () leaving the screw casing () through at least one outlet opening () in the screw casing () that is arranged in the discharge zone (A) of the other end face of the screws (). In order to provide advantageous plasticating conditions it is proposed that the ratio of the numerical values of the screw outside diameter (c, d) to the profile overlap, i.e. to the overlapping area of the two screws (), both in the feed zone (E) and in the discharge zone (A) is in the range of between one to one and one to two.

Device for processing material by mixing and/or plasticating

An apparatus for the preparation of thermoplastic plastics material to be recycled has two treatment stages following one after the other. At least two receiving containers, which are capable of being evacuated and which are attached in parallel to a receiving container of the second stage, are present in the first stage. A device is present by which an alternating batch-wise charging of the receiving container of the second stage takes place from the receiving containers of the first stage. The said device controls discharge members of the receiving containers of the preceding stage, which leads into a channel. A shut-off member is provided for each receiving container of the preceding stage in the said channel. The alternating device controls the shut-off members. The method of preparing thermoplastic plastics material, to be recycled, utilizes an apparatus of this type.

Device and method for the preparation of recyclable thermoplastic plastic material

The invention relates to an apparatus for extruding thermoplastic material, comprising an extruder screw () which is mounted in a housing (), comprises a plasticizing section (P) on the inlet side, a degasification section (E) upstream of an outlet section (A), a flow arrester (S) between the plasticizing section (P) and the degasification section (E) with a screw section with a counter-rotating delivery flight (), and at least one flow channel () bridging the flow arrester (S) and containing a melt filter (). In order to reduce the driving power of the extruder screw () it is proposed that a sleeve (), which encompasses the screw () and is mounted in the housing () in a rotationally fixed manner, is associated with the screw section that forms the flow arrester (S), and the screw () in the screw section of the flow arrester (S) has a smaller screw diameter in relation to the plasticizing section (P) and preferably also to the degasification section (E).

Device for extruding a thermoplastic product having sleeve forming screw section of flow arrester and screw with small screw diameter in relation to plasticizing section

The invention relates to a device for the extrusion of thermoplastic synthetic material featuring an extruder screw () which is mounted on a housing () including a plasticizing section (P) at the inlet side, a degassing section which is mounted upstream on a discharge section (A) and a conveying outlet () operating in the opposite direction which is located between the plasticizing section (P) and the degassing section (E). A flow channel () that contains a melt filter () is bridged over by at least one of the conveying outlets () in the opposite direction. To create favorable production conditions, the extruder screw () forms a similar conveying outlet () operating in the same direction between the conveying outlet () in the opposite direction and the downstream port () of the flow channel (). The housing () has at least one degassing vent () at the transition area of the conveying outlet () operating in the opposite direction and the conveying outlet () operating in the same direction.

Device for degassing and filtering plastic melts

The invention relates to an apparatus for the continuous filtering of impurities from a flowable compound, especially a plastic melt, comprising a filter insert () in the form of a hollow rotary body which is held to rotate about its rotational axis (A) relative to a housing () and is flowed through by the flowable compound and which is arranged in a flow conduit of the housing () between a feed conduit () for the compound to be filtered and a discharge conduit () for the filtered compound, and a discharge apparatus for impurities held back by the filter, which apparatus comprises a feed screw () cooperating with the filter insert (). In order to provide advantageous constructional conditions it is proposed that the filter insert () comprises a disk-like filter () which is arranged on the face side of the rotary body and is coaxial to the rotational axis (A).

Apparatus for the continuous filtering of impurities from a flowable compound

A device for processing material by mixing and/or plasticization or agglomeration has a screw housing, in which at least two screws are situated adjacent to one another. The screw channels are engaged with one another. The screws are driven to rotate by at least one motor. The screws are supplied with the material through an intake opening of the screw housing and the processed material leaves the screw housing through at least one outlet opening. An apparatus is provided, which in operation of the device provides the gap which exists between adjacent screw channels of the screws alternately with a periodic enlargement or reduction, which is superimposed on the rotational movements of the two screws. In the method for material processing, the material, in addition to the compaction which is caused by the conveyance action of the screws, is subjected to periodic squeezing by the screws.

Device for proceeding material by mixing and/or plasticization or agglomeration providing periodic enlargement or reduction to gap between screw channels

An apparatus for filling a screw () bearingly supported within a housing (), in particular of an extruder, for processing of pre-comminuted synthetic plastics material, in particular PET, has a filling opening () for the screw housing (). This filling opening () is in flow connection with the lower outflow opening () of an upright receptacle) for the material to be processed. Within the receptacle (), tools () circulate around a, preferably vertical, axis, which tool act onto the material positioned within the receptacle (). This material is introduced into the evacuable receptacle () through a sluice (). A quickly circulating tool () for creating a mixing cone () is disposed between an upper interior portion () and a lower interior portion () of the receptacle (). Within the lower interior portion () that constitutes a dwell space for the heated plastics material that has reached it for thermal homogenization thereof, also circulating tools () are disposed, which, however, are mere mixing tools without substantial introduction of power, so that within this dwell space an agglomeration of the plastics material is avoided.

Device for charging a screw lodged in a housing and method for operating a device of this type

A backwashable filtering device for thermoplastic plastics material is disclosed. The device can filter thermoplastic plastics material through one or more nests of screens in the filtering position, while submitting some nests of screens to the backwashing process that cleans them. The filtering position and the backwashing position are selectable by displacing one or more carrying bodies with respect to a housing and/or by displacing one or more control bodies with respect to the carrying bodies. The backwashing can be performed over an entire nest of screens or over a portion of a nest of screens. The nests of screens can be straight or curved.

Backwashable filtering device

The invention relates to a device for granulation of an ejected material from at least one nozzle (), in particular a thermoplastic plastic, with a perforated plate () comprising the nozzles (). A blade head () supporting several blades () lies opposite the same, fixed to a shaft () which is rotatably driven by a motor (). The motor () is suspended such as to be displaced relative to the housing () by means of a suspension (), however the above is suspended in such a manner that displacement is only possible in the direction of the axis () of the shaft () and not in a radial direction. The suspension () comprises at least one membrane () which suspends the motor () on the granulator housing (). The motor () can be adjusted relative to the perforated plate () by means of an adjuster device (), such that the desired pressure of the blade on the perforated plate () is maintained. The excised granulate particles are drawn out of the housing () by means of coolant.

Granulating device

An apparatus for filling a screw () bearingly supported within a housing (), in particular of an extruder, for processing of pre-comminuted synthetic plastics material, in particular PET, has a filling opening () for the screw housing (). This filling opening () is in flow connection with the lower outflow opening () of an upright receptacle) for the material to be processed. Within the receptacle (), tools () circulate around a preferably vertical axis, and they act on the material positioned within the receptacle (). This material is introduced into the evacuable receptacle () through a sluice (). A quickly circulating tool () for creating a mixing cone () is disposed between an upper interior portion () and a lower interior portion () of the receptacle (). Within the lower interior portion () that constitutes a dwell space for the heated plastics material that has reached it for thermal homogenization thereof, also circulating tools () are disposed, which, however, are mere mixing tools without substantial introduction of power, so that within this dwell space an agglomeration of the plastics material is avoided.

A device for the preparation of plastics material for recycling purposes has a container () with an upper inlet opening () for the material. In the container (), at least one tool () rotates about the vertical container axis. This tool feeds the treated material through an outlet opening () which is arranged at the bottom of the container () and to which the housing () of at least one screw () is connected. That side wall () of the feed opening () at which the tool () discharges defines a widening () extending continuously towards the screw axis. This widening () extends over part of the circumference of the screw turns () so that the screw-side edge of this widening () forms an uninterrupted shearing edge () co-operating with the screw turns ().

Device for preparation of plastic materials for recycling purposes

A device for the preparation of plastics material, in particular thermoplastic plastics material, has a receiving container () for the material, the interior of the receiving container () having tools () provided therein which are arranged on a carrier disc (). The tools are driven by a shaft () for rotation about the, in particular vertical, axis () of the shaft (). At least one screw () is provided for the removal of the material out of the receiving container (). The screw housing () has a feed opening () which is connected with respect to flow to a discharge opening () in the container (), which discharge opening () is situated at a lower level than the carrier disc () and the tools () carried by it. Further moved tools (), which convey the material into the discharge opening (), are provided in the receiving container () below the carrier disc (). The carrier disc () comprises at least one aperture () which connects the space () above the carrier disc to the space () below it, in order to divert water vapor and/or gaseous substances out of the space (). The apertures () are situated close to the axis () and close to the trailing edges () of the tools () during the rotation of the carrier disc ().

Device for preparing plastics material

A device for treating plastics material, in particular thermoplastic plastics material, has a receiving container () which has a base () and lateral walls (). In the receiving container at least [one] disc () is arranged close to the base (), and is driven by a vertical shaft () so as to rotate about its axis and carries tools (), as a result of which a circulating movement about the axis of the shaft () is imparted to the material present in the receiving container (). At least one blade () which projects beyond the edge of the disc () in the direction towards the lateral wall () is fastened to the said edge of the disc () adjacent to the lateral wall (). The blade is inclined with respect to the horizontal plane in such a way that the plastics material moved by the tool () or the tool carrier () during its circulation is given an upwardly directed movement component.

Apparatus for treating plastics material

A device for the preparation of, preferably thermoplastic, plastics material for recycling purposes has a container () in which at least one rotating mixing and/or comminuting tool () is arranged. The material thus treated is fed through an outlet opening () which is arranged at the bottom of the container () and to which the feed opening () of a housing () is fluidly connected. In this housing are arranged at least two screws () which are jointly charged with material. The diameter (D) of the container () and the diameter (d) of each of the screws () are in the relationship=10{square root over ()},where

Method for processing synthetic materials for the purpose of recycling

A backflushable filtering apparatus for a molten material, particularly for a plastic melt, comprises a housing () in which a sieving arrangement () is provided which includes at least two sieving sections () separated from one another. The melt to be filtered is supplied to the sieving sections () through at least one distributor (). The distributor () includes at least one control body () for backflushing which is moveable within a housing () that is provided with an inlet opening () for the material to be filtered. The control body (), in a filtering position, unblocks the influx of material to be filtered to all sieving sections () through connection channels (). However, in a backflushing position, the control body () interrupts the influx of material to the filtering section () to be backflushed and interconnects the connection channel () of the sieving section () flushed back with a discharge channel () located in the control body (). At least the majority of the circumference of the control body () is surrounded by a distribution space () for the material to be filtered which is situated within its housing (). The distribution space () is connectable through the connection channels () to all sieving sections () in communication with the distributor (). Guiding channels () lead from the inlet opening () to the regions of the two front ends () of the distribution space (). These front ends () are situated in the region of the outermost connection channels () or outside the region of all connection channels (). The discharge channel (), which leads away from the control body (), may be caused to communicate with the connection channel () of the respective sieving section () to be flushed back through a flush back channel () of at least one cross-piece () of the control body () which overbridges the distribution space ().

Growing community of inventors

Linz, Austria

Helmuth Schulz