Abstract: A method and apparatus for washing and separating pieces of plastics material from contaminants includes supplying to a washing container pieces of plastics material containing contaminating material and an entering flow of washing fluid. A turbulent stirring action to detach and separate mechanically the contaminating material from the plastics material is generated, evacuating through overflowing, through an outlet port An outlet flow of washing fluid and a quantity of plastics material that has undergone the turbulent stirring action is evacuated by overflow through an outlet port. A controlled-conveying and retaining arrangement is driven to retain the plastics material in the washing container and to advance in a controlled manner the quantity of plastics material to the outlet port independently of the advancement of the outlet flow of washing fluid.

Abstract: A method and apparatus for washing and separating pieces of plastics material from contaminating material that also includes metal elements includes a stirring device having a plurality of blades which are driven in a washing fluid to generate a turbulent stirring action to mechanically remove part of the contaminating material from the plastics material. The tilt of the blades and the rotation speed of the stirring device are chosen carefully to generate an upward thrusting action to maintain the plastics material with a specific weight that is greater than the specific weight of the fluid in a floating condition. The plastics material is retained inside the container for sufficient time to obtain a desired degree of purity and decontamination for the plastics material, after which it is evacuated by controlled overflow.

Abstract: A method and apparatus for washing sheets of plastic material originating from industrial and agricultural waste, for subsequent reuse thereof as a raw material. The sheets of plastic material, precut into soiled pieces of large dimensions, and a water flow are supplied to a washing tank containing a water bath; a screw stirrer generates intense stirring of the water bath and recirculation, inside the tank, of the soiled plastic pieces that causes the contaminating material to be detached and separated by sedimentation from the plastic pieces. The cleaned pieces of plastic material of large dimensions, devoid of contaminant, which float in the water bath are removed by dragging, in a floating condition, along a discharging channel by the combined action of a dragging device and of a water flow that exits the washing tank; the dragging device, consisting of an endless belt, extends from one side of the washing tank along the discharging channel, supported in a freely tiltable manner.

Abstract: A method for washing and separating pieces of plastics material from contaminating material that also includes metal elements, comprises the steps of: supplying, to a washing container, a washing fluid, having a first specific weight value , and the pieces of plastics material joined to the contaminating material; driving, in the washing container, a stirring arrangement provided with blades for generating in the washing fluid a turbulent stirring action to remove from the plastics material, through mechanical action, the part of contaminating material adhering thereto.

Abstract: Method for washing a plastics material and for separating contaminating substances therefrom comprises the steps of: supplying a first flow of a washing fluid together with the plastics material with contaminants to a washing container in which a stirrer generates a turbulent action to detach mechanically the contaminants adhering to the plastics material, enabling a first fraction of heavier contaminants to precipitate onto a first bottom portion of the container, thus performing a first action of separating contaminants; transferring a second flow: of fluid with floating plastics material from the container to a first separating chamber, in which a second separating action takes place with the precipitation of a second fraction of the contaminants onto a second bottom portion of the first chamber; conveying a third flow of fluid with floating plastics material from the first chamber to a second separating chamber and evacuating by overflowing an outgoing flow of fluid together with the processed plastics ma

Abstract: A method and apparatus for washing sheets of plastic material originating from industrial and agricultural waste, for subsequent reuse thereof as a raw material. The sheets of plastic material, precut into soiled pieces of large dimensions, and a water flow are supplied to a washing tank containing a water bath; a screw stirrer generates intense stirring of the water bath and recirculation, inside the tank, of the soiled plastic pieces that causes the contaminating material to be detached and separated by sedimentation from the plastic pieces. The cleaned pieces of plastic material of large dimensions, devoid of contaminant, which float in the water bath are removed by dragging, in a floating condition, along a discharging channel by the combined action of a dragging device and of a water flow that exits the washing tank; the dragging device, consisting of an endless belt, extends from one side of the washing tank along the discharging channel, supported in a freely tiltable manner.

Abstract: A method and apparatus for washing and separating pieces of plastics material from contaminants includes supplying to a washing container pieces of plastics material containing contaminating material and an entering flow of washing fluid. A turbulent stirring action to detach and separate mechanically the contaminating material from the plastics material is generated. evacuating through overflowing, through an outlet port An outlet flow of washing fluid and a quantity of plastics material that has undergone the turbulent stirring action is evacuated by overflow through an outlet port. A controlled-conveying and retaining arrangement is driven to retain the plastics material in the washing container and to advance in a controlled manner the quantity of plastics material to the outlet port independently of the advancement of the outlet flow of washing fluid.

Abstract: A method and apparatus for dosing treatment substances into a system for washing and recycling synthetic plastics is provided. The method includes providing a freely supported container operationally connected to a programmable weighing and control unit. The container is overturned by gravity between a treatment substance loading and unloading position. The method further includes storing a reference value of a weight suitable for overturning the container to the unloading position, supplying a treatment substance to the container, detecting the weight thereof, stopping the supply upon reaching a preset weight value, and supplying a washing substance to the container until the reference value is reached. Upon reaching the reference value, gravity overturns the container to the unloading position and sends the treatment substances to synthetics plastic washing modules.

Abstract: A plant and a method for separating labels, caps and other contaminating materials from containers and bottles made of plastics, in particular bottles made of PET, in the field of treating and recycling plastics.

Abstract: An apparatus and method for removing labels from containers made of plastics, such as PET bottles includes: a tubular stator and a rotor defining an annular chamber that extends along a path; on the rotor members are mounted for rotationally dragging and pushing the containers inside the annular chamber; on the tubular stator there are first scraping tools provided with first tip ends; the dragging and thrusting members include second scraping tools provided with second tip ends that are distributed along one or more helical paths; the first tip ends and the second tip ends define respectively in the annular chamber a first punctiform scraping surface and a second punctiform scraping surface for the containers, in which the distance between the first punctiform scraping surface and the second punctiform scraping surface is maintained substantially constant in a longitudinal and circumferal direction with respect to the rotor.

Abstract: A method for separating materials of various type having different softening temperature values, includes pouring a mixture of flakes and fragments of materials on a movable receiving and conveying device in a uniformly distributed manner and advancing it along a first portion of path; actuating an electromagnetic inductor to heat an outer metal surface by electromagnetic induction, which surface is included in the movable receiving and conveying device to achieve a first lower softening temperature corresponding to a first material of the mixture; subjecting the mixture to a separating action during which a first fraction, remains stuck to the outer metal surface, whereas a remaining second fraction of materials having higher softening temperatures than the first softening temperature freely slips by gravity towards a lower receiving zone.

Abstract: A method for separating materials of various type having different softening temperature values, includes pouring a mixture of flakes and fragments of materials on a movable receiving and conveying device in a uniformly distributed manner and advancing it along a first portion of path; actuating an electromagnetic inductor to heat an outer metal surface by electromagnetic induction, which surface is included in the movable receiving and conveying device to achieve a first lower softening temperature corresponding to a first material of the mixture; subjecting the mixture to a separating action during which a first fraction, remains stuck to the outer metal surface, whereas a remaining second fraction of materials having higher softening temperatures than the first softening temperature freely slips by gravity towards a lower receiving zone.

Abstract: A plant and a method for separating labels, caps and other contaminating materials from containers and bottles made of plastics, in particular bottles made of PET, in the field of treating and recycling plastics.

Abstract: An apparatus and method for removing labels from containers made of plastics, such as PET bottles includes: a tubular stator and a rotor defining an annular chamber that extends along a path; on the rotor members are mounted for rotationally dragging and pushing the containers inside the annular chamber; on the tubular stator there are first scraping tools provided with first tip ends; the dragging and thrusting members include second scraping tools provided with second tip ends that are distributed along one or more helical paths; the first tip ends and the second tip ends define respectively in the annular chamber a first punctiform scraping surface and a second punctiform scraping surface for the containers, in which the distance between the first punctiform scraping surface and the second punctiform scraping surface is maintained substantially constant in a longitudinal and circumferal direction with respect to the rotor.

Abstract: A method and an apparatus for removing labels (12) and/or for washing containers (10) in recyclable plastic material; the containers (10) with labels (12) to be removed are supplied upwards from the bottom of a vertical screw feeder (15), in which a water flow is supplied from above to drag the removed labels (12?) downwards into a collection chamber (31) positioned underneath an inlet opening (20) for the containers (10) in the vertical screw feeder (15); the water flow for downwardly dragging the removed labels (12?), may also be used for removing contaminants and washing the containers (10) while they are moving upwards.

Abstract: Tubular labels and contaminants can be removed from containers and/or bottles of plastic material to be recycled, by subjecting the containers and/or bottles to a first weak mechanical washing and slow centrifugating action, followed by a separation step for separating the removed labels and contaminants from the containers. The containers are subsequently subjected to a second strong mechanical washing and fast centrifugating action for the removal from the containers and/or bottles of any residual labels and contaminants.

Abstract: Tubular labels and contaminants can be removed from containers and/or bottles of plastic material to be recycled, by subjecting the containers and/or bottles to a first weak mechanical washing and slow centrifugating action, followed by a separation step for separating the removed labels and contaminants from the containers. The containers are subsequently subjected to a second strong mechanical washing and fast centrifugating action for the removal from the containers and/or bottles of any residual labels and contaminants.

Abstract: A filter device for separating particulate material from a stream of flowable plastics; the device comprises a body member having at least a filter chamber and a flow path extending between inlet and outlet sides. A filter band transversally extends in said filter chamber, across the flow path, being supported by a back-plate having a perforated area. An axially movable valving member comprising a flow passage for the plastic material, is provided into the chamber, and an actuator to axially move the valving member between an advanced and a retracted position in which the valving member connects respectively disconnects the flow passage from the inlet or the outlet sides of the device, and for sealingly clamping the filter band peripherally around the perforated area of the back-plate.

Abstract: A self-locking filter-screen feeding device for plastic material; the device comprises a carriage which may be reciprocated on guide rods parallelly extending to a filter band movable across a flow-path for the plastic material to be filtered in a filter apparatus. The carriage is provided with a resting surface for the filter band and pressure members, angularly rotatable operatively connected to actuators for selectively engaging and urging the filter band against the resting surface and for reciprocating the carriage along the guide rods.

Abstract: A plant for the separation at high temperatures of contaminants from plastic material in small pieces or in leaves, including at least one stage (2) for the separation of contaminants, which in turn includes a centrifugal separator device designed to separate an input flow of plastic material in small pieces or in leaves, with contaminants and a conveying fluid comprising water and steam, into a main flow of the material and the conveying fluid and into a secondary flow of the contaminants and the conveying fluid. The separation stage includes, moreover, a cyclone designed to receive in input the secondary flow and to divide it into a discharge flow of the contaminants and water and into a flow of steam which is conveyed towards the inlet of the separation device of the same stage and/or of the previous stages.