MILL FOR THE DENSIFICATION OF METALLIC MATERIAL

Description

DESCRIPTION The present invention falls within the technical sector 5 of the mills for the densification of scrap metal. It is known to the technician in the sector that the "mill" is a machine for processing metallic material, e.g example shredded and / or crushed material obtained from a scrap. This processing consists in making more 10 dense the material, so as to make it more easily transportable. Therefore, the object of the present invention is a mill for densifying material. According to the state of the art, mills are machines 15 extremely bulky ones that take up surface area of the order of hundreds of square meters. In addition to its considerable size, a further disadvantage of the mills currently present on the market consists of in the way the mill is powered. 20 particular, the material is placed on top of a conveyor belt that takes it above a chamber densification (otherwise known to the industry expert as a “grinding chamber”) where it is dropped. Disadvantageously, the material can be placed 25 in a non-homogeneous manner along the conveyor belt and This inhomogeneity results in a non-filling uniform and discontinuous of the densification chamber which can therefore be too full or too empty. It is also evident to the expert in the field that a 5 excess material in the densification chamber can cause breakdowns, jams and unnecessary downtime machine, resulting in financial damage to the company. The purpose of this invention is to propose a mill for densifying material, for example 10 shredded and / or crushed metallic material obtained from a wreck, which is able to at least partially remedy to the inconveniences complained of above. This purpose is achieved with a mill according to the claim 1. Dependent claims 15 describe preferred embodiments of the invention. The characteristics and advantages of the second mill the invention will still be evident from the description of his examples below 20 favorites of realization, given for information purposes only and non-limiting, with reference to the attached figures, in which: - figures 1-2 are perspective views of the mill in an embodiment, obtained along different 25 angles; - figure 3 is a side view of the mill according to the embodiment of figures 1-2; - figure 4 is a perspective view of a rotor; - figures 5-5a are perspective views of a portion 5 lower chamber, obtained according to different angles; - figure 6 is a perspective view of a grid; - figure 7 is the perspective view of a unit of drive; 10 - Figure 8 is a side view of a loading organ and a feeding chamber; and - Figure 8a is a schematic sectional view of a thrust member movable in the chamber diet. 15 In the continuation of the description, elements common to the various embodiments represented in the drawings are indicated with the same reference numbers. In the said drawings, 1 indicates a mill for the densification of a generic material, for example 20 a crushed and / or shredded metallic material obtained from a scrap, according to the invention as a whole. In accordance with the present invention, the mill 1 comprises: a loading organ 2, a chamber densification 3, a grid 4, a vibrating table 5 25 and a feed chamber 6. The loading device 2 is suitable for receiving the material with which to feed the mill. Preferably, the loading member 2 comprises a hopper. The material is loaded into the hopper 5 using a mechanical gripping arm, such as a mechanical spider. Alternatively, the hopper can be loaded with material even with a tape transporter in accordance with the state of the art. The densification chamber 3 comprises a rotor 30 a 10 in turn equipped with a plurality of hammers 31. I hammers 31 are configured to beat the material and increase its density until it becomes a material densified. Preferably, the rotor 30 comprises a plurality of 15 shafts and each hammer of the plurality of hammers 31 It is mounted with angular play on a respective shaft of the plurality of trees. Grid 4 is suitable to be crossed by the densified material. In detail, grid 4 is 20 equipped with slots that allow passage only to the densified material of suitable size for cross the aforementioned cracks. The material is considered densified when – following of hammering 31 - the fragments of 25 materials take up less volume (for the same weight) and manage to pass through the gaps in grid 4. Preferably, grid 4 is crossed by the densified material, so that the material densified can exit the densification chamber 5 3. Vibrating table 5 is suitable for receiving the material densified passed through grid 4 and is configured to convey such densified material towards the outside of the mill 1. 10 In particular the vibrating table 5, thanks to its motion vibratory, allows the densified material to advance; furthermore, its vibrations contribute to make the material flow homogeneous densified. 15 The feeding chamber 6 connects the loading organ 2 with the densification chamber 3. The feeding chamber 6 comprises a thrust 60 (also known to the industry expert by the name of “pusher”) which is configured to push the 20 material in the densification chamber 3, in detail towards rotor 30. In detail, this pusher 60 is housed in the feeding chamber 6. The feeding chamber 6 is also equipped with a 25 dust exhaust channel 68 for fume exhaust and / or dust produced by the ingress of the material inside the feeding chamber 6. Preferably, the feed chamber 6 is equipped with at least one sensor configured to detect 5 the exact position of the pusher 60 along the feeding chamber 6. In accordance with an embodiment illustrated schematically in figure 8a, the thrust member 60 comprises a stem 61 that can be moved along an axis of 10 stem movement S. The stem 61 is equipped with one end of a push head 62 configured for push the material towards the rotor 30. In the case in point, the axial translation of the stem 61 occurs along a prevalent direction of development of the 15 feeding chamber 6. According to one embodiment, the mill 1 comprises also a management and control unit configured for detect the energy absorption of the rotor 30 during its operation. The management and control unit 20 regulates the actuation of the pusher 60 in function of energy absorption by the rotor 30. It is evident that a high consumption of energy is associated with substantial inactivity (or reduced translation) of the thrust member 60, and 25 vice versa. In accordance with one embodiment, the organ of load 2 is positioned above the feed chamber 6. Preferably, the densification chamber 3 is 5 adjacent to the feeding chamber 6 and such chambers densification 3 and power 6 are substantially aligned along an axis of material handling M. In particular, the material handling axis M is 10 horizontal. It should be noted that – for the purposes of this discussion – the terms “horizontal”, “vertical”, “superior”, “lower”, “above”, “below” and related derivatives are to be understood as referring (unless otherwise specified) 15 at mill 1 in working condition. Preferably, the stem movement axis S and the material handling axis M are parallel or coincident. According to one embodiment, the chamber 20 densification 3, the grid 4 and the vibrating table 5 are substantially aligned along an axis of material convoy C. Preferably, the material conveyance axis C is vertical. Therefore, the densification chamber 3, the 25 grid 4 and vibrating table 5 are arranged vertically in axial succession. The densified material, exploiting gravity, passes through grid 4 and is then transported towards the outside of the mill 1 from the vibrating table 5. 5 According to the embodiment shown in the attached figure 3, the movement axis material M and the material conveyor axis C are incident and preferably orthogonal to each other. The feeding chamber 6, the densification chamber 10 3, grid 4 and vibrating table 5 define a main portion of machine P' substantially a inverted “L” shape. It should be noted that the “L” shape inverted it can be observed on a plane of inclination of the material handling axis M and of the axis of 15 material convoy C. In accordance with the embodiment shown in the attached figure 3, the feeding chamber 6, the densification chamber 3, the grid 4 and the table vibrant 5 delimit a secondary portion of 20 rectangular P” machine. It should be noted that the rectangular shape can be observed on the plane of the plane of the material handling axis M and of the axis of material convoy C. According to one embodiment, the mill 1 comprises 25 also a hydraulic and oleodynamic power unit 7 and a mill drive unit 8. The hydraulic and oleodynamic power unit 7 is configured to adjust axial translation of the pusher 60 and to power a circuit of 5 mill lubrication 1. In this case, the hydraulic power unit and hydraulics 7 and mill drive unit 8 are housed in the secondary portion of machine P”, in so as to limit the size of the mill 1. 10 Mill 1 is also equipped with an electrical panel placed inside a storage cabinet 9. In particular, the storage cabinet 9 is also positioned in the secondary portion of machine P”. In accordance with one embodiment, the unit of 15 mill drive 8 includes a slide 80 and a motor 81 mounted on said slide 80. The slide 80 can be moved along one direction of slide translation A, in order to facilitate the maintenance or replacement operations of the unit 20 mill drive 8 (or parts thereof). This direction of translation slide A is incident, and preferably orthogonal to the plane of the position defined by the material handling axes M and material convoy C. 25 Preferably, the sled 80 and the motor 81 are obtained under the loading organ 2 and / or under the chamber power supply 6 (figure 3). The 81 engine is electric and powers the rotation of the rotor 30 via a belt transmission 5 82. According to one embodiment, the chamber densification 3 includes a lower portion of room 3a and an upper portion of room 3b between their connections. 10 For example, the lower 3a and upper portions of chamber 3b are connected by a universal joint 33, preferably a zipper (figure 2). In the lower portion of room 3a a seat 32 where the grill 4 is housed. Preferably, 15 the grid 4 is curvilinear and the seat 32 comprises a pair of curvilinear shoulders on which the grid 4 it is supported when mill 1 is in operation; therefore, seat 32 is configured as a sort of cradle for grid 4. 20 The densification chamber 3, in particular the portion upper room 3b, is equipped with a fireplace smoke extraction 34 to remove the smoke produced during densification, i.e. from the functioning of the hammers 31 striking the material. 25 In accordance with the embodiment illustrated in the attached figures 5 and 5a, in the densification chamber 3 an exhaust opening 35 is obtained positioned underneath grid 4, i.e. below seat 32. Therefore, the densified material passing through grid 4 5 reaches the vibrating table 5 passing through the exhaust opening 35. Innovatively, the mill which is the subject of this the invention fulfills its intended purpose. Advantageously, the mill is extremely compact and 10 can reach extremely small dimensions if compared to any other mill currently in existence present on the market. From an advantageous point of view, the mill is completely automatic; in fact, once the 15 material in the loading organ, the operator only needs to worry about taking the densified material from the vibrating table, as the mill does not require the presence of any dedicated operator. From an even further advantageous point of view, the 20 mill object of the present invention reduces the rotor energy consumption. To the embodiments of the above mill, a technician in the field, to meet contingent needs, could bring variations or substitutions of elements 25 with other functionally equivalent ones. These too variants are contained within the scope of protection as defined by the following claims. Furthermore, each of the variants described as belonging to a possible embodiment can be realized 5 independently in other embodiments described.

Claims

CLAIMS 1. Mill (1) for densifying a material, for example a shredded and / or crushed metallic material obtained from scrap, said mill (1) comprising: - a loading member (2) suitable for receiving the material with which to feed the mill (1); - a densification chamber (3) comprising a rotor (30) equipped with a plurality of hammers (31), said plurality of hammers (31) being configured to beat the material and increase its density until it becomes a densified material; - a grid (4) suitable for being passed through by the densified material;- a vibrating table (5) adapted to receive the densified material passed through the grid (4) and configured to convey said densified material towards the outside of the mill (1), wherein the mill (1) also comprises a feeding chamber (6) connecting the loading member (2) to the densification chamber (3), said feeding chamber (6) comprising a pushing member (60) configured to push the material into the densification chamber (3).; 2. Mill (1) according to the preceding claim, wherein the pushing member (60) comprises a stem (61) movable along a stem movement axis (S), said stem (61) being equipped at one end with a pushing head (62) configured to push the material towards the rotor (30).

3. A mill (1) according to any of the preceding claims, further comprising a management and control unit configured to detect the energy absorption of the rotor (30), said management and control unit actuating the thrust member (60) as a function of the energy absorption by the rotor (30).

4. Mill (1) according to any of the preceding claims, wherein the loading member (2) is positioned above the feeding chamber (6), and wherein the densification chamber (3) is contiguous to the feeding chamber (6), such that said densification (3) and feeding (6) chambers are substantially aligned along a material handling axis (M).

5. Mill (1) according to any of the preceding claims, wherein the densification chamber (3), the grid (4) and the vibrating table (5) are substantially aligned along a material conveyor axis (C).

6. Mill (1) according to claims 4 and 5, wherein the material handling axis (M) and the material conveying axis (C) are incident and preferably orthogonal to each other, the feeding chamber (6), the densification chamber (3), the grid (4) and the vibrating table (5) defining a main machine portion (P') substantially L-shaped.

7. Mill (1) according to any of the preceding claims, wherein the feeding chamber (6), the densification chamber (3), the grid (4) and the vibrating table (5) delimit a secondary machine portion (P) of rectangular shape.

8. Mill (1) according to the previous claim, also comprising a hydraulic and oleodynamic power supply unit (7) and a mill drive unit (8), the hydraulic and oleodynamic power supply unit (7) and the mill drive unit (8) being housed in the secondary portion of the machine (P), so as to limit the overall dimensions of the mill (1).

9. Mill (1) according to claim 8, wherein the mill drive unit (8) comprises a slide (80) and a motor (81) mounted on said slide (80), the slide (80) being movable along a slide translation direction (A), so as to facilitate maintenance of said mill drive unit (8).

10. Mill (1) according to any of the preceding claims, wherein the densification chamber (3) comprises a lower chamber portion (3a) and an upper chamber portion (3b) connected to each other, in the lower chamber portion (3a) a seat (32) being obtained where the grid (4) can be housed.

11. Mill (1) according to any of the preceding claims, wherein in the densification chamber (3) a discharge opening (35) is provided positioned under the grid (4), so that the densified material passing through the grid (4) reaches the vibrating table (5) passing through said discharge opening (35).