ITPD20110167A1 - STORAGE CELL AND / OR MIXING AND / OR DOSAGE WITH HORIZONTAL DEVELOPMENT OF PLASTIC RECOVERY MATERIAL - Google Patents

Description

STORAGE AND / OR MIXING AND / OR DOSING CELL A

HORIZONTAL DEVELOPMENT OF PLASTIC MATERIAL OF

RECOVERY

DESCRIPTION

This patent relates to the plastic processing sector and in particular concerns a storage and / or mixing and / or dosing cell with horizontal development of recovered plastic material.

The recycling of plastic materials is known, comprising a set of operations and treatments aimed at collecting particular types of plastic waste, recovering the recyclable fraction and treating it until extrudable material is obtained.

This material is then extruded to form plastic granules to be sent to the plastic manufacturing processes.

In known types of plastic recycling plants, the material to be recovered is first of all purified from any impurities or substances of different types, for example paper, dirt, metals, etc.

Plastic is also divided into different types based on the type of polymer, for example polyethylene, polypropylene, etc.

The plastic objects are then crushed into small fragments which are thus easily stored and manipulated and therefore transportable to extruders that melt the plastic and make the granules.

The handling, storage, transport and mixing steps of these fragments are completely automated by using known devices.

For example, vertical silos are known, comprising a box-like body, for example cylindrical, with a loading hopper located above and an unloading mouth located below, through which the fragments fall by gravity into containers or shelves with relative scales for dosing. of the material.

Plastic objects such as ropes, bags, non-woven fabrics, etc. are known.

These objects, for their recycling, are initially shredded, creating fragments with a filamentary or fibrous matrix or in any case portions that are not uniform and not easily manipulated.

Currently, material of this type is handled manually as the material cannot be handled with automated processes. The plastic pieces, being fibrous, filamentary, very light and not uniform in size and shape, cannot in fact be treated like the rigid plastic fragments which can instead be stored, distributed, weighed and sent to the extruder using fully automated processes with deti known devices.

Said vertical silos cannot in fact be used with said non-uniform fragments, which cannot be dosed by gravity alone, since the material has a low specific weight, for example 20/50 kg per cubic meter, and the fragments have a filamentous conformation. , tangle and create a skein.

For the same reason, even the mixing operations cannot be carried out automatically, as the mass of material cannot be manipulated but is piled up.

Currently, these materials are handled manually, they are packed in order to be loaded, transported and stored. To process them, it is then necessary to cut the bales, for example, into slices or portions which must then be weighed, possibly refracted and then sent to the extruder.

Therefore, the systems and plants for the storage, transport, mixing and extrusion of said materials are not completely automated and are not carried out in a single continuous process, but require intermediate phases and the intervention of operators, thus lengthening times and costs. material management.

Furthermore, these processes and operations require large spaces, particularly for the storage of normally large bales.

To overcome all the aforementioned drawbacks, a new type of storage and / or mixing and / or dosing cell with horizontal development of recycled plastic material has been studied and realized, particularly with a filamentary or fibrous matrix or in any case with non-uniform size and very light. The main aim of the present invention is to automate the whole process for managing the plastic material for recovery, comprising processing scraps, post-consumer material or waste to be recovered in general, after their grinding.

In particular, the new cell is particularly suitable for the management of plastic materials, probably coming from the grinding and purification of ropes, non-woven fabrics, big-bags, flexible containers, or other, that is, materials with a generally filamentary matrix.

Another purpose of the present invention is to provide for both storage and mixing and dosing with weighing of the fragmented material, without the intervention of the operator.

Another purpose is to operate continuously, without interruptions or intermediate phases, continuously dosing the material leaving the cells and sent to subsequent processing phases.

These and other direct and complementary purposes are achieved by the new storage and / or mixing and / or dosing cell with horizontal development of recovered plastic material.

The new cell is particularly suitable for the management of recycled plastic material already ground and with a filamentary or fibrous matrix or in any case with non-uniform size.

The new cell is in fact shaped in such a way as to manipulate, mix and dose the material despite its filamentary matrix which makes the material itself tangle in a skein.

Said ground material is loaded into said storage cell, for example by means of air current ducts, which load the material from above.

The characteristics of the new cell will be better clarified by the following description with reference to the drawing table, attached as a non-limiting example, where, in figure 1, a side view of the new cell is schematised.

The new cell (1) comprises a box-like body (2) or casing with a substantially horizontal development, for example a parallelepiped.

In the preferred solution, the new cell (1) comprises a bottom wall (21) or bottom, side walls (22), top wall or ceiling (23), a rear head wall (24) and a front head (25) for unloading the stored material.

On said ceiling (23) of the cell (1) there are several openings (3) for loading the material from above, in correspondence with which rotating diffusers (31) are installed, able to homogeneously distribute the material in the cell itself, thus providing already at a first mixing.

Said openings (3) are preferably distributed over the entire length of the cell.

A conveyor belt (4) is preferably installed on said bottom wall (21), occupying substantially the entire surface of said bottom (21), and having a direction of advancement arranged in the direction (X) of the length of the cell.

In particular, said belt (4) advances, transporting the material stored in the cell, from the rear head wall (24) towards the front head (25) of the cell, which is preferably open and where at least one device (5 ) for lifting, milling, dosing and unloading of the material. Said lifting device (5) preferably comprises a cutter with an inclined sliding belt (51), adapted to lift the material from the height of the conveyor belt (4) of the cell, to a higher discharge level, where the cutter (51) unloads the material on a further plane or tape external (6) to said cell (1).

Said lifting device (5) is arranged in correspondence with said front head (25) and has a width substantially equal to the width of the cell (1), i.e. the width of said conveyor belt (4) of the bottom (21) of the cell.

On said cutter (51) of the lifting device (5) there are also needles or blades or reliefs (52) generally suitable for collecting the material deposited in the cell (1), furthermore shelling it and separating it from the skein, so as to lift all the layers of the coil itself, from bottom to top, thus providing for a further mixing of the material that will be discharged.

The material unloaded outside the cell by means of said cutter (51) is loaded onto a weighing and transport system (6) preferably comprising one or more sliding conveyor belts (6) and one or more weighing devices, for sending to subsequent working process.

It is also envisaged that said cell (1) comprises one or more doors (26) for inspecting the interior of said box-like body (2).

These are the schematic modalities sufficient for the skilled person to realize the invention, consequently, in concrete application there may be variations without prejudice to the substance of the innovative concept.

Therefore, with reference to the preceding description and to the attached table, the following claims are expressed.

Claims (1)

CLAIMS Cell (1) for handling, storage, transport, mixing and management in general of recovered plastic material particularly with a filamentary or fibrous matrix or in any case with non-uniform size comprising a material loading system (3, 31) and a device discharge and metering device (5), characterized in that it comprises devices (4) adapted to move the material stored inside it in a substantially horizontal direction (X) up to said discharge and metering device (5). Cell (1) as per claim 1, characterized in that it comprises a substantially horizontal box-like body or casing (2), in turn comprising: â € ¢ at least one bottom or bottom wall (21), side walls (22), top wall or ceiling (23), a rear head wall (24) and a front head (25) for unloading the stored material; â € ¢ two or more loading openings or openings (3) distributed along the length of said ceiling (23), to homogeneously distribute the material in the cell itself, providing for a first mixing; â € ¢ at least one conveyor belt (4) on said bottom (21), occupying substantially the entire surface of the bottom (21) itself and having a forward direction (X) arranged along the length of the cell (1), to transport the material stored in the cell itself from said rear head wall (24) towards said front head (25) of the cell; â € ¢ at least one device (5) for lifting, milling, dosing and discharging the material installed on said front head, said lifting device (5) in turn comprising a cutter with an inclined sliding belt (51), suitable for lifting the material from the height of the conveyor belt of the cell, to an upper discharge level, where said cutter (51) unloads the material onto a further plane or belt (6) external to said cell (1). Cell as per claim 3, characterized in that said cutter (51) of said lifting device (5) has a width substantially equal to the width of the cell (1), i.e. the width of said conveyor belt (4) of the bottom (21) ) of the cell and where on said cutter (51) of the lifting device there are needles or blades or reliefs (52) generally suitable for collecting the material deposited in the cell, furthermore shelling it and separating it from the skein, so as to lift all the layers of the coil itself, from bottom to top, thus also providing for a further mixing of the material that will be discharged. 4. Cell according to claims 1, 2, 3, characterized in that it comprises a loading system for said storage cell (3) comprises one or more ducts in air current, which load the material into said cells from above. by means of said revolving diffusers (31). 5. Cell according to the preceding claims, characterized in that it comprises a system or control unit for controlling the sliding speeds of said conveyors (4, 51) for handling, lifting and dosing the material, for continuous dosing of the material.