EP2919921A1

EP2919921A1 - Waste sorting device having a rotary screen

Info

Publication number: EP2919921A1
Application number: EP13792377.7A
Authority: EP
Inventors: Jean-Marc Meurville; Rémi GOMEZ; Nicolas Laurent; Jan-François CHAMOUX; Lucile NOURY-SOYER
Original assignee: Green Creative SAS
Current assignee: Green Creative SAS
Priority date: 2012-11-19
Filing date: 2013-11-18
Publication date: 2015-09-23
Also published as: FR2998197B1; FR2998197A1; US20150306631A1; WO2014076285A1

Abstract

The invention concerns a treatment apparatus (1) for collecting the matter adhered to the outer surface of packages that are to be treated and have previously been shredded, said apparatus (1) comprising: - a cylindrical rotary drum (4) forming a screen to hold the shredded packages (13) and to allow the matter to be collected to pass therethrough; - a rotary brush (7) mounted in the rotary drum (4) to brush the inner face of this drum; - motorised means (12) for rotating the brush (7) and the cylindrical drum (4); - an outer housing (3) for collecting the matter from the shredded packages inserted into the cylindrical drum (4) and having passed through the wall of this cylindrical drum (4).

Description

Waste sorting device with rotary screen

The invention relates to a device for cleaning the packaging in the context of the reprocessing of waste resulting particularly from large distribution. BACKGROUND OF THE INVENTION

In the field of the treatment of waste resulting particularly from mass distribution, it is known from the patent document FR2943630 an apparatus for extracting a liquid or pasty product contained in a container of non-brittle material, such as a container containing a product cosmetic or a metal tin can.

This device comprises two wheels rotating about parallel axes being separated from each other by an air gap, with motorized means for driving in rotation these two wheels in the opposite direction. One of the wheels is provided with radially projecting spikes, and the other wheel has recesses receiving the spikes when they are at the height of the air gap.

When a package is introduced into this machine, it is jointly compressed and pierced during its passage in the air gap, which allows to extract the contents to separate the packaging and the content that has been extracted.

Concretely a package that comes out of this device, such as a can, is ragged but part of the product initially contained in this package adheres to the faces of this package, and has not actually been evacuated.

OBJECT OF THE INVENTION

The object of the invention is to propose a solution to overcome the above disadvantages.

SUMMARY OF THE INVENTION

For this purpose, the subject of the invention is a treatment apparatus for collecting material adhering to the outer surface of packages to be treated and which have been previously shredded, this apparatus comprising: a rotating cylindrical drum forming a screen for retaining shredded packages and for passing the material to be collected;

a rotating brush mounted in the rotary drum for brushing the internal face of this drum; - Motorized means for driving in rotation the brush and the cylindrical drum;

- An outer casing for collecting the material from shredded packages introduced into the cylindrical drum and having passed through the wall of the cylindrical drum. The invention also relates to an apparatus as defined above, wherein the drum has on its inner face teeth to push the packages between the brush and the inner face of the drum.

The invention also relates to an apparatus as defined above, comprising a casing surrounding the outer face of the drum for collecting the material having passed through the drum during processing.

The invention also relates to an apparatus as defined above, wherein the drum is inclined relative to the horizontal to facilitate the admission and evacuation of the packages to be treated and the evacuation of the extracted materials.

The invention also relates to an apparatus as defined above, wherein the drum is provided with blades on its outer face which are arranged in a helical arrangement to push the extracted material along the inner face of the housing when the drum rotates. .

The invention also relates to an apparatus as defined above, wherein the brush comprises brushing elements arranged in a helical pattern to facilitate the circulation of shredded packages along the device during their treatment.

BRIEF DESCRIPTION OF THE FIGURES

Figure 1 is an overall view of the apparatus according to the invention shown in perspective; Figure 2 is a sectional side view of the apparatus according to the invention showing the inside of its drum with the rotating brush; Figure 3 is a sectional side view of the apparatus according to the invention showing the outside of its drum equipped with fins arranged in a helical pattern.

DETAILED DESCRIPTION OF THE INVENTION The treatment apparatus according to the invention which is indicated by 1 in FIG. 1 comprises a frame 2 in the form of a structure formed by mechanically welded steel profiles, carrying a rigid casing 3 in the form of a solid sheet metal cylinder that extends horizontally.

The casing 3 encloses a drum or trommel 4 in the form of a sheet metal cylinder pierced by a series of holes or openings 6 over the vast majority of its surface to constitute a rotary screen, and a rotating cylindrical brush 7 mounted inside. of the trommel 4.

As shown in Figure 1, the cylindrical brush 7 has a diameter of the order of half the inner diameter of the trommel 4, the cylindrical housing 3 has a diameter greater than that of the trommel 4 because it surrounds this trommel. Other diameter values may be chosen depending on the general arrangement selected.

The trommel 4 is rotatably mounted by being guided at each of its ends by three rotary rollers arranged at a hundred and twenty degrees about its axis of rotation, these rollers being marked by 8, 9 and 1 1 at the visible end at Figure 1.

The brush 7 is rotated by a motor 12, partially visible in Figure 2, and which is carried by the frame 2 at one end of the device. This brush 7, which is rotated by the motor 12, can itself cause the trommel 4 to rotate. Additional drive means may also be provided for rotating the trommel in the same direction as the brush 7. , and at a slower speed.

In operation, the brush 7 and the trommel 4 both turn in the same direction, which is the indirect direction indicated by the letter I in FIG. 1, which has the effect of stirring the packaging to be treated which are present in the internal space E delimited by the trommel 7 and the brush 4.

Specifically, each packaging element, such as the element indicated by 13 in Figure 1, follows a circular path during its treatment: it is caught by the brush 7 to be brushed and taken into the gap, it is to say the area in which the brush is supported on the inner face 7, where this element is brushed.

This has the effect of removing the materials adhering to the surface of this shredded package 13. Once this element has left the gap zone, it is ejected by the brush 7 to the upper region, to follow a substantially circular path, represented by a dotted arrow in Figure 1, during which it jumps above the brush 7, before being again caught by it to go into the air gap.

In its trajectory, it is also common that during its fall, the package lands first on the brush, so that it projects it against the inner face of the trommel 4, which has the effect of increasing still the effectiveness of the evacuation of adhering materials.

During each hopping cycle, the packaging in process loses an additional portion of the adhering materials to its surface, these being brushed by the brush 7 at each passage in the gap, and also centrifuged when the package passes over of the rotating brush.

The dimensions of the openings 6 of the drum 4 are chosen to retain the shredded and lacerated packaging, while allowing the materials they contain to adhere to these packagings. The passage of the materials in question is further facilitated by the centrifugal effect of the rotation of the trommel 4, so that these materials are then found in the casing 3, the shredded packages being themselves retained within the space E.

Complementarily, the trommel 4 is provided on its inner face with different teeth, marked by 14 in Figure 1, which are oriented radially so as to interfere with the brushing elements of the brush 7, when the system is in operation. These teeth thus make it possible to cut the possible plastic or other bags found among the packages to be sorted, so as to ensure that these plastic bags do not disturb the treatment process.

As can be seen in FIG. 1, each tooth 14 has a plane shape with a triangular outline, and it extends in a plane normal to the axis of rotation of the trommel while being oriented towards the axis. Furthermore, each tooth 14 has a right front edge, that is to say oriented radially relative to the axis of rotation, which is the edge meeting the brush first during operation, and a rear edge inclined. The tilted back edge is the one through which the tooth leaves contact with the brush after passing through the gap.

The rear edge of the teeth 14 facilitates the cleaning of the apparatus: in this case, the assembly is urged to rotate in the opposite direction of its direction of rotation during the treatment, so that it is the inclined edges of the teeth that interfere with it. with the elements of the brush. This causes significant bending of the brushing elements during rotation, to promote effective cleaning of the brush. During this cleaning phase, the inclined edges can lacerate any plastic films present among the packaging to be treated. As illustrated in Figure 2, the brushing elements of the brush 7, that is to say its bristles, are located along the latter in a helical pattern to drive the packaging along the trommel 4 during their treatment , so as to naturally cause their evacuation at one end of the trommel 4.

Similarly, the outer face of the trommel 4 is provided with a set of blades 16 which are also arranged in a helical pattern to drive the extracted materials along the housing which contains them, for their evacuation to the one of the ends of the casing 4. In the example illustrated in the figures, there is provided a lower vertical duct 17 which is connected to a lower opening of the casing 3 located at the end of the casing which is opposite the motor 12. As can be seen in FIGS. 2 and 3, the helicoids corresponding to the pattern of the rotary brush 7 and the blades 16 have steps of opposite orientations, so as to move the packages to be treated and the extracted materials in opposite directions. along the equipment during the treatment process. Specifically, according to the arrangement of the figures, when the brush 7 and the trommel 4 are rotated in the indirect direction indicated by I, the shredded packages to be processed are introduced into the space E, by the opposite end to the motor 12 .

During processing, these packages hop on top of the brush 7 while being periodically snapped up by it, and they are at the same time progressively displaced towards the end of the motor 12 because of the generally helical shape of the brush 7 At the same time, the materials initially adhering to these packagings are extracted and pass through the trommel screen 4 to be found in the lower part of the casing, and be conveyed by its blades 16 to the exhaust duct 17 so as to be recovered for example in a container placed under this duct.

Advantageously, the entire device is inclined so that the opposite end to the motor 12, which are introduced to the packages to be treated is lower than the other, through which are evacuated packages that have been treated. This arrangement facilitates effective treatment, in which it is the helical shape of the brush that promotes the recovery of packaging that has been treated. It is also conceivable to provide an inverse inclination to facilitate the evacuation of packaging and to raise the extracted materials.

Claims

1. Treatment apparatus (1) for collecting material adhering to the external surface of packages (13) to be treated and which have been previously shredded, this apparatus (1) comprising: - a cylindrical drum (4) rotating forming a screen for retaining shredded packages (13) and to pass the material to be collected;

- a rotating brush (7) mounted in the rotary drum (4) for brushing the inner face of this drum;

- Motorized means (12) for rotating the brush (7) and the cylindrical drum (4);

- An outer casing (3) for collecting the material from shredded packages (13) introduced into the cylindrical drum (4) and having passed through the wall of the cylindrical drum (4).

2. Apparatus according to claim 1, wherein the drum (4) has on its inner face teeth (14) for pushing the packages (13) between the brush (7) and the inner face of the drum (4).

3. Apparatus according to one of the preceding claims, comprising a housing

(3) surrounding the outer face of the drum (4) to collect material passed through the drum (4) during processing.

4. Apparatus according to one of claims 1 to 3, wherein the drum (4) is inclined relative to the horizontal to facilitate the admission and discharge of packaging (13) to be treated and the evacuation of extracted materials.

5. Apparatus according to claim 3, wherein the drum (4) is provided with blades (16) at its outer face which are arranged in a helical arrangement to push the extracted material along the inner face of the housing (3) when the drum

(4) turn.

6. Apparatus according to one of claims 5 to 7, wherein the brush (7) comprises brushing elements arranged in a helical pattern to facilitate the circulation of shredded packages (13) along the device during their treatment.