An apparatus (1) for processing recycled plastic material for granule forming, comprising: – means (2) for the extrusion of plastic material to be recycled in order to obtain a stream of melted plastic material that can move along an advancement direction (A), – means (3) for introducing a deodorization fluid in the stream of melted plastic material, and – an assembly (4) for degassing the stream of melted plastic material additized with the deodorization fluid; the introduction means (3) are arranged between the extrusion means (2) and the degassing assembly (4) along the advancement direction (A).
B29C 48/40 - Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws, e.g. twin screw extruders
An apparatus (1) for degassing molten plastic material, which comprises an intake chamber (2), provided with an entry port (3) and an exit port (4) for the molten plastic material, and an evacuation chamber (6) for the gas present in the molten plastic material, provided with an entry opening (7) and an exit opening (8) for the molten plastic material, which is arranged downstream of the intake chamber (2) along a flow direction (F) of the molten plastic material with the entry opening (7) associated in communication with the exit port (4) of the intake chamber (2). The apparatus (1) further comprises forming means (9) for the molten plastic material in transit through the evacuation chamber (6), which comprise at least one forming die (10). The forming means (9) are associated so that they can move with an alternating sliding motion along a movement direction (M) transverse to the flow direction (F) with respect to the intake chamber (2) and said evacuation chamber (6), the forming means (9) being adapted to assume alternately a first operating configuration, in which the at least one die (10) is associated in communication with chambers through the exit port (4) of the intake chamber (2) and the entry opening (7) of the evacuation chamber (6), and a second operating configuration, in which the at least one die (10) is accessible from outside the chambers.
B29C 48/385 - Plasticisers, homogenisers or feeders comprising two or more stages using two or more serially arranged screws in separate barrels
B29C 48/14 - Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired formApparatus therefor characterised by the particular extruding conditions, e.g. in a modified atmosphere or by using vibration
B29C 48/25 - Component parts, details or accessoriesAuxiliary operations
applying vacuum to the reaction chamber during at least part of the heat application step. The heat application occurs by dielectric microwave heating of the mass of recycled PET.
A method for polycondensation of recycled PET that allows to optimize the heating of the material, reducing the duration of the treatment and the corresponding energy consumptions so as to increase its efficiency significantly. This method comprises the steps of:¨ introducing a mass of recycled PET in a reaction chamber,¨ applying heat to the mass of recycled PET introduced in the reaction chamber in order to reach a working temperature and maintain it for a treatment time,¨ moving the mass of recycled PET during at least part of the heat application step;¨ applying vacuum to the reaction chamber during at least part of the heat application step;the heat application occurs by dielectric microwave heating of the mass of recycled PET.
C08J 11/10 - Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
A method for polycondensation of recycled PET, comprising the steps of: - introducing a mass of recycled PET in a reaction chamber, - applying heat to the mass of recycled PET introduced in the reaction chamber in order to reach a working temperature and maintain it for a treatment time, - moving the mass of recycled PET during at least part of the heat application step; - applying vacuum to the reaction chamber during at least part of the heat application step; the heat application occurs by dielectric microwave heating of the mass of recycled PET.
B29B 13/08 - Conditioning or physical treatment of the material to be shaped by using wave energy or particle radiation
C08J 11/10 - Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
A method of determining the mass flow of a casting of molten material, in particular in the process for producing rock wool, comprising the steps of: perturbing, through perturbation means (6), the casting (4) of molten material falling in a gravitational field along an advancing axis (4a); acquiring, through video acquisition means (7), a propagation of the perturbation (P) along the casting (4) of free-falling molten material; calculating the propagation rate (vp) of the perturbation along the casting (4) of molten material through data processing means (8) co-operating with the video acquisition means (7); calculating the flow rate (m) of the casting (4) of molten material as a function of said propagation rate (vp).
G01F 1/66 - Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by measuring frequency, phase shift or propagation time of electromagnetic or other waves, e.g. using ultrasonic flowmeters
C03B 37/05 - Manufacture of glass fibres or filaments by using centrifugal force by projecting on a rotating body having no radial orifices
Shredders for industrial use; milling cutters; gear cutters;
stacking machines; centrifuges; mixing machines; extrusion
moulding machines; packaging machines; wrapping machines;
packaging machines, namely roll up machines, slab packing
machines, ceramic fiber roll packaging machines; machine and
machine tools for the cutting and forming of material;
feeding machines for feeding raw material to furnaces;
machines and machine tools for the cutting and forming of
rockwool, glassfibers and plastic, namely water cutting
machines, cross-cutting machines, edge trimming units,
guillotine, longitudinal slitting units, spinner and fibers
forming filtering machines, extruders, grinders, feeders,
cooling units, crimping units, stitching machines, raw
materials extractors, regeneration units, cupola melters,
basin melter; machines for rockwool manufacturing; machines
for polystirene manufacturing; machines for bitumen
application. Furnaces; furnaces for the glass fibers making industry;
furnaces for the rockwool making industry; air filters for
industrial installations; industrial air filter machines;
water filters; plastic material recycling plants comprised
primarily of one or more of the following pieces of
equipment, namely grinding mill, forced feeder, extruder,
filter, cutter, shredder, dehumidifier, cooler, raw material
storage plants for mineral wool manufacturing, air cooling
apparatus, cooling domes, cooling evaporators.
Shredders for industrial use; milling cutters; [ gear cutters; ] stacking machines; centrifuges; [ mixing machines; ] extrusion moulding machines; [ packaging machines; ] wrapping machines, packaging machines, namely, roll up machines, [ slab packing machines, ] ceramic fiber roll packaging machines; machine and machine tools for the cutting and forming of material; [ feeding machines for feeding raw material to furnaces; ] machines and machine tools for the cutting and forming of rockwool, [ glassfibers and plastic ], namely, water cutting machines, cross-cutting machines, edge trimming units, guillotine, longitudinal slitting units, spinner and fibers forming filtering machines, extruders, [ grinders, feeders, cooling units, ] crimping units, stitching machines, [ raw materials extractors, ] regeneration units, cupola melters [, basin melter ] [ Furnaces; ] furnaces for the glass fibers making industry; furnaces for the rockwool making industry; [ air filters for industrial installations; industrial air filter machines; water filters; ] installations for recycling plastic material containing one or more of the following pieces of equipment, namely, grinding mill, forced feeder, extruder, filter, cutter, shredder [, dehumidifier, cooler, temperature controlled raw material storage plants for mineral wool manufacturing, air cooling apparatus, cooling domes, cooling evaporators ]
