FR2519880A1 - GRINDING MACHINE FOR RECOVERY PRODUCTS, IN PARTICULAR PLASTIC MATERIAL - Google Patents

Abstract

THIS MACHINE IS OF THE TYPE INCLUDING A ROTOR 5 TURNING INSIDE A BODY 11 TO WHICH ARE ASSOCIATED A CHUTE 34 FOR SUPPLYING THE PRODUCTS TO BE CRUSHED AND A CHUTE 16 FOR DISCHARGING THE CRUSHED PRODUCTS. THE PROBLEM TO BE SOLVED IS, AMONG OTHERS, TO REDUCE ENERGY CONSUMPTION, WHILE DEALING WITH LARGE PARTS. FOLLOWING THE INVENTION, THE SUPPLY CHUTE 34 HAS A HOLLOW BACKGROUND 35 AND THE FRAME SHOWS TANGENTIALLY TO THE ROTOR AND ON EACH OTHER OF THE TANGENCY ZONE A FIRST FULL PLATE 23 AGAINST WHICH THE BOTTOM 35 IS SLIDING AND A SECOND PLATE FULL OFFSET AND DELIMING WITH IT A FEEDING OPENING 29 WHILE THE SECOND PLATE 24 CARRIES A PUSH-BUTTON 37 THAT CAN CLOSE THIS OPENING 29. THE INVENTION FINDS AN ADVANTAGEOUS APPLICATION ON THE PLATE CRUSHING MACHINE .

Description

Grinding machine for recovery products, in particular

made of plastic

  The present invention relates to grinding machines for recovery products, in particular plastics, of the type comprising a rotor provided with blades of

  cut and mounted inside a generally shaped frame

  which are associated, in accordance with

  diametrically opposed, a feed chute

  grinding product and an evacuation chute

crushed products.

  Machines of this type are already known.

  eg in which, more particularly, the rotor axis is horizontal and the frame comprises, joined in a horizontal joint plane, on the one hand, a lower part of frame, semi-cylindrical and in which is located said chute of evacuation which carries a calibration grid, this part

  lower part also having fixed cutting blades

  placed near the joint plane and, on the other hand, a

  above which the bottleneck is located

  food supply and which has a communication opening

  with the latter; this upper part is mounted with this chute, tilting around an external transverse axis to allow access to the interior of the mill in

  cleaning and maintenance, for example

  placement of the cutting blades, and it is the same, in the

  same purpose, either of the lower structure or of the

  cuation, around the same transverse axis.

  However, it is found that in these

  known machines, the opening of communication between the govern-

  loader and the upper part of the frame is

  placed exactly above the rotor and has a width and a length substantially corresponding to the diameter and the length of the rotor, this opening remaining permanently open and the chute being integral with said portion

superior of the frame.

  2 - It follows that these machines are

  dimensioned according to the maximum dimensions of the

  the products or parts to be treated therein, so that they are very large if it is necessary to grind, inter alia, large parts such as, for example, bins of plastic or even, in some

  use cases, bathtubs made of plastic

  However, these same large machines are also

  for example, molding cores, residues from the manufacture of molded plastic products. Thus, since these machines are equipped with rotor drive motors which have a power of as much

  higher than the dimensions of these machines are

  they usually present significant overcapacity (

  for example treating lt / h, while sometimes only lt / j capacity is to be treated), as well as a considerable excess energy consumption; this is how the

  installed power, which is only about 3 HP for a

  tor (that is to say a feed opening and parts of maximum dimensions) of 200 X 150 mm, reaches values of approximately 150 CV for dimensions of 1000 X 600 mm A is added the fact that, because of these same important dimensions, these machines are extremely noisy and create particular problems of soundproofing, being given that

  the engine can not provide the necessary torque for the shear-

  parts if they are already in contact with the rotor; alone

  the inertia of this cernier, already at normal speed, makes it possible

  Finally, because of the permanent communication

  between the feed chute and the crusher proper, these machines do not allow a load start; in addition, due to the effects of shock due to the falling of heavy parts directly on the rotor, these noise problems are

find even more.

  This is why the invention aims

2519880-

  It is also necessary to provide a machine of the type considered which eliminates the aforementioned drawbacks and more particularly enables the power output to be reduced while admitting pieces or products to be grinded of large dimensions, this reduction in power being of course accompanied by a reduction

  concomitant noise during operation, which

  multaneously avoids overcapacity, and that finally does not give

  No impact on the rotor and

rage in charge.

  For this purpose, the object of the invention is a machine of the type mentioned above, characterized in that the feed chute has a planar bottom recessed and parallel to the axis of the rotor and the frame has, on the one hand arranged approximately tangentially to the rotor and on one side

  of the tangent zone, a first plateau full against the-

  which said bottom of the chute is slidably mounted in di-

  on the other side of the tangent zone, and on the other hand, on the other side of the tangent zone and offset by a certain distance from the first plate.

  direction of the rotor axis, a second solid plate, parallel to

  leles to the first and has an edge adjacent to the rotor,

  which delimits, with the edge of the first plateau located at

  the tangent zone, an opening of

  substantially in the form of a cylindrical sector, the bottom edge of the feed chute directed towards the second plate carrying a pusher which substantially occludes dadite supply opening when the chute is

  located above the first plateau In particular,

  advantageously, and in the known manner, the axis of the rotor is horizontal and it is the same of the two trays and

  sliding bottom of the feed chute.

  Thanks to this arrangement, while the actual feed opening can be of relatively small dimensions, the section of the chute

  the feed itself and its hollow bottom may be ex-

  -4- more importantly and thus allow the loading

  very large pieces of furniture

  kills when the chute is placed above the part

  full of the first board, these pieces then

  on the second plate (under the effect of gravity for a horizontal rotor machine) when the test chute slidably moved over the latter, the actual rotor feeding then taking place on return of the gou-otte in its first position

  thanks to the pusher that moves the piece or pieces to be grinded

  laying on the second plateau, through the opening of

  This makes it possible to process large parts using a reduced power grinder, which allows significant energy savings.

  and avoids, in addition, overcapacity.

  can be started in charge and finally the sound of the

machine is significantly reduced.

  Other characteristics and advantages

  of the invention will emerge from the description which will

  follow, by way of non-limiting example and with reference to the accompanying drawings, in which: FIG. 1 represents a view in

  lateral elevation, in partial section in its

  of a machine, according to a particular embodiment according to the invention; FIG 2 shows a right view of this machine;

FIG 3 shows an enlargement

  a detail of this Fig 2, concerning the guiding of the feed chute; FIG 4 is a view similar to that of FIG 1, illustrating a different position of the feed chute during operation of the machine.

  The machine represented by the

  -5 res is a grinding machine for recovery products,

  such as bins or plastic tubs.

  This machine includes a fixed frame

  which consists of a base 1 on which rise two pan-

  external longitudinal vertical soundproofing 2 and two inner plates which are parallel thereto 3 Between these two inner plates 3, and at their edges

  a rotor whose X-X axis is horizontally

  zontal and perpendicular to said plates, this rotor being schematized in FIG. 1 by its support core 4 and by

  the primitive circle 5 described by the edges of the

  The rotor is carried at its two ends and outside the plates 3 by two bearings 6 mounted on said plates and beyond which one protrudes a drive shaft integral with the core 4 and which is driven through a set of reducing pulleys and transmission belts 7 by a first motor 8 mounted on the base 1 at one end thereof. Between the same inner plates 3 is disposed a movable lower part of frame 9 which is located below a horizontal joint plane P-P

  located substantially at the level of the X-X axis.

  Bile 9 is located below and surrounds two parallelepiped blocks 10 which extend transversely between

  the inner plates 3 and beyond them, feel

  These two blocks extend essentially outwards with respect to a theoretical stator cylinder 11, the structure of which will be specified below, each of these blocks carrying a blade along its length. horizontal fixed cutter 12 which is held by a clamping and adjusting plate 13 and protrudes inside said cylinder 1h so as to co-operate in shear with the movable blades of the rotor whose

edges describe the circle 5.

  -6- While these blade blocks 10

  are mounted fixed on the frame plates 3, the lower part

  Mobile frame 9 is mounted pivotably about a first transverse axis 14 located substantially in the plane P-P behind one of the blocks 10 relative to the rotor. This movable portion has a bowl shape whose edge opposite the axis 14 is'posed behind the second block 10 relative to the rotor and supported by vertical tie rods 15 which cling to brackets fixed under the part of casting 21 described below in

  its middle part, this bowl 9 carries an evacuation chute.

  cuation 16 which passes through it, so that its superior contour

  come to rest below the blocks 10, while

  its lower opening opens into a cylin-

  This duct is partially closed at one of its extremities, while at the other it is aligned with a sealed seal with the axial inlet of a pneumatic exhaust fan. 18 who is

  fixed between the frame plates 2 and 3 as opposed to the

  7 of the rotor, and which itself has its own

  drive wheel Wr 19 A 20 gauge calibration grid

  The semi-cylindrical tube is disposed inside the trough 16 along the aforesaid theoretical stator cylinder 11, this grid being also integral with the assembly.

  tilting lower part and resting by its ex-

  trenches below the edges of the blocks 10.

  Above the same plane of joint P-P, there is disposed a moving upper part of frame 21 which comprises, between longitudinal vertical flanges 22, two rectangular and solid horizontal plates 23 and

  24 on either side of the vertical plane,

  by the X-X axis of the rotor, and at two different levels.

  The upper plate 23 is arranged approximately tangentially

  5 to the cylinder 5 described by the edges of the rotor, its inner edge 25 having a shear-wedge-shaped insert 25, while below this same edge of the plate is welded, between the lateral flanges 22, a sector fixed cylindrical stator 26 which is arranged along the theoretical stator cylinder 11 and whose inner end rests on the block 10 located on the same side as the plate 23 This sector 26 extends

  therefore substantially following a quarter circle around the

  The second plate 24, located on the opposite side, is located at a level lower than that of the plate 23, at a distance which is smaller than the radius of the theoretical stator cylinder 11 so as to be located above the other block 10 and generally above the joint plane PP The

  inner edge of this plate 24 extends to the same cy-

  11 and carries a vertical bottom plate 27 disposed substantially in the same cylinder 11 and which

  relies on the second block 10 The first plateau 23 is so-

  lidaire, beyond its edge 25 of a hollow rectangular frame 28 which is arranged in the same plane and which extends to

  both above the second plateau 24 and above the

  rotor supply 29 which is formed between the edge 25 of the plate 23 and the inner edge 30 of the plate 24 and has a cylindrical sector shape has the same theoretical cylinder 11 This hollow frame 28 is fixed

  between the longitudinal flanges 22 and the assembly that constitutes

  these flanges 22, the plates 23 and 24 and the stator sectors 26 and 27, are mounted swinging upwards about a second transverse axis 31 which is also located slightly

  close in the joint plane P-P, but is disposed at the end

  The axis 31 is mounted on plates 32 which extend the main inner plates 3 and is furthermore provided, on either side of the inner plates. fixed 3, two horizontal soundproofing side panels 33 extending on either side of the tilting upper part, at a level slightly greater than that of the plate 23 and the frame 28, and whose outer edges come to rest on the

  fixed vertical soundproofing panels 2.

  Above the horizontal assembly formed by the plate 23 and the hollow frame 28, there is a sliding sliding chute of large dimsmions 34. The latter has the shape of a parallelepipedic high-rise rail whose bottom is

  constituted by a hollow rectangular frame 35, the di-

  The lengths of this frame 35 and therefore of the plates 23 and 24 may, for example, exceed one meter whereas the diameter of the rotor (pitch circle 5) is only 0.30. The height of this same chute can also be very important and for example reach 2 meters, so that a load can represent up to 2 m 3 of product treat The upper part of this chute is closed relatively tightly by

  via a flap-side filling flap

  table, not shown The transverse and upper walls

  the chute are double and consist of two spaced parallel tees, one of which is perforated, this assembly being favorable to good soundproofing.

  cross of the frame 35 located on the side of the plate 24 is pro-

  lange, on the same side, by a cantilevered plate 36

  under which are fixed, on the one hand, a cylindrical sector

  movable stator 37 which is arranged along the theoretical cylinder 11 when the chute 34 is located above the

  plateau 23, this sector 37 fulfilling the function of pushing

  evening and on the other hand, by means of

  a flap 33 extending over the entire width of the

  plate 24 and which is articulated on the said clevises of ma-

  to be facing downwards and towards the rotor.

  The free edge of this flap 38 can be defeated in an inter-

  a few centimeters between the inside edge

  30 of the plate 24 and the lower edge of the sector-

  Pusher 37 The pivot axis of this flap is located sen-

  sibly at this edge of the pusher and the flap is secured to a control device that can place it 9 -

  in a raised horizontal position, at least

  calf of the pusher 37, in the lowered position in which it rests and is held on the surface of the plate 24 The same cross member of the frame 35 which is extended by the plate 36 has its edge turned towards the inside of the gou-

  burbot, a beveled insert 39 which cooperates with

  25 The same work

  forward of the frame 35 and the two longitudinal members 40 of

  the latter rest directly on the plateau 23 and the

  dre 28 which extends it by means that will be described below, while the rear cross 41 is raised above this plateau so as to leave an interval that is of the same order of magnitude as that existing between the plateau 24 In fact, below this crosspiece 31, is mounted, in the same way as the flap 38, a second similar flap 42, but which is directed downwards towards the rotor This flap can be raised or lowered on the plate 23 by means

  similar to those in part 38.

  As more specifically shown in FIG. 3, the lower frame 35 of the trough 34 receives in an outer lower shoulder 43, longitudinal and transverse blocks 44 which extend in this paulement all around the frame and which are made in one. plastic material promoting a tight slip as known under the trade name Teflon These blocks 44 are fixed to the frame 35 and their lower face rests on the edges of the upper plate 23 and the recessed frame 28 which extends, while their outer side face, opposed to the frame 35 and the outermost part of their upper face (which projects beyond the frame 35) slide one and the other on the two wings of an inverted L-shaped bracket 45 fixed under each of the extensions of On these same frame extensions 33, are mounted at the outermost end of the frame 28,

  sec 46 fixing cylinders 47 whose race cor-

  respond substantially? a chute length, or a length

  23 or 24, the rods 48 of these jacks being articulated on the chute 34, on either side of

  it and on its rear face opposite the rotor.

The operation of the

  China thus described is as follows: When filling chute 34, it is in the position of fig 1 where it is located above the top plate 23 It is thus possible to fill it, by its hatch, and

  this even if the rotor of the crusher is already trained in rota-

  tion, which is the case when it comes to successive fillings The volume of each load of the chute can be extremely important since reaching for example 2 m 3 for the aforementioned dimensions The chute located

  isolated rotor, has avoided the effects of shock on the latter-

  The hatch will also remain closed during the entire grinding cycle, which facilitates the soundproofing of the machine. This chute 34 is then moved, with the help of the vines 47, towards its other extreme position as illustrated by FIG. 4, during this course, which may for example be carried out at a rate of one go and return per minute, the products contained in the trough 34 are transferred above the hollow frame 28 and then rest on the lower plate 24 During this same course to go, the control means of the flap 39 3 which raised the latter of so that it can pass over the projections of crushed products ue the rotor

  may have previously sent to the surface of this

  teau. The cylinders 47 are then actuated in the opposite direction to bring the chute into actuated in the opposite direction to bring the chute into it -

  its initial position, and during this race, the par-

  The lower part of the products of the charge deposited on the plate 24 are pushed progressively on the rotor 5 and undergo the conventional grinding due to the cooperation of the blades of this rotor with the fixed blades 12. At the same time, the control means of the shutter 38 have lowered the latter at the level of the plate 24, so that this component sweeps the projected products mentioned above by reducing them

  towards the rotor At the end of this return run, cooperation

  cutting edges of parts 39 and 25 made

  shear the material located at their level and thus clearly separate the part of the load that has just been brought to the mill from that which still remains

  in the trough 34 above the plateau level 23.

  It can therefore be seen that the grind can work on parts some of which

  dimensions reach one meter for a rotor with a diameter

  300 mm This makes it possible to use for

  this reduced power engine, for example a 75 hp engine running 51500 rpm (then

  that a conventional grinder of diameter and opening of admission

  same size would require an installed power of at least 150 HP). Of course, because of the reduction in

  diameter of the mill, the noise of the machine is further reduced.

  ne, this one Being already soundproofed because of the structure

  double-walled feed chute.

  Finally, it should be noted that the second flap 42 provided on the rear inner edge of the trough 34 also allows, by being lowered on the deck 23 by its control means when the trunking

  moves from the initial position of Fig 1 to the position

  intermediate of Figure 4, to scan the rejected products on the same plate 23 by the rotor Its control means then fall this component during the second part of the race so that it can pass above the products that have just been projected before you can pick them up

during the next race.

12 2519880

Claims (10)

  A recovery grinding machine, in particular a plastics machine of the type comprising a rotor (5) provided with cutting blades and rotatably mounted inside a   frame (1 l) of cylindrical general shape to which are associated   in a substantially diametrically opposite arrangement, a chute (34) for feeding products to be ground and a chute (16) for discharging the ground products, characterized in that the feed chute (34) has a planar bottom (35) recessed and parallel to the axis (X) of the rotor and the frame has, on the one hand, disposed approximately tangentially to the rotor and on one side of the tangent zone, a first solid plate ( 23) against which said bottom (35) of the chute is slidably mounted in reciprocating motion, and secondly, on the other side of the tangent zone and offset by a certain distance from the first plate (23). in the direction of the axis (X) of the rotor, a second solid plate (24), parallel to the first and representing an edge (30) adjacent to the rotor, which delimits, with the edge (25)   the first plateau in the vicinity of the tan-   a feed opening (29) substantially in the shape of a cylindrical sector, the edge (36) of the bottom of the feed chute directed towards the second plate (24) carrying a pusher (37) which substantially obturates said opening (29) when the   chute (34) is located above the first tray (23).   Machine according to claim 1, characterized   characterized in that the edge (25) of the first plate located in the vicinity of the zone of tangency and the inner edge (39) of the hollow bottom of the feed chute disposed on the side of the second plate have sharp bevels cooperating shears.   3 Machine according to any one of the   1 and 2, characterized in that the first plate (23) is integral with a recessed frame (28) situated in the same plane and on the other side of the zone of tangency and   view of which extends the second plate (24).   4 Machine according to any one of   Claims 1 to 3, characterized in that the pusher   (37) integral with the bottom (35) of the feed chute (34) has substantially the shape of the sector   cylindrical of the feed opening (29). Machine according to any one of   Claims 1 to 5, characterized in that said edge   (30) of the bottom (35) of the feed chute (34) directed towards the second plate (24) door, disposed on the opposite side to this edge relative to the pusher (37), a flap (38) of axis parallel to that of the rotor and whose free edge can be thrown in a gap formed between the edge (30) of the second plate (24) adjacent to the rotor   rotor and the edge facing the pusher (37).   Machine according to any one of   Claims 1 to 5, characterized in that the edge (41)   the bottom (35) of the feed chute (34) opposite that which is directed towards the second plate (24) carries a flap (42) of axis parallel to that of the rotor and directed   towards the inside of the chute and towards the first   water (23) and whose free edge can be look at this first tray.   7 Machine according to any one of   claims 5 and 6, characterized in that said   flap (38,42) is provided with control means away from the associated plate (24,23) when it moves away from the rotor (5) and bringing it into contact with this plate (24,23) when is approaching said rotor.   8 Machine according to any one of   Claims 1 to 7, characterized in that the chute   of feeding (34) is equipped with fixed jacks between it and all of the two trays (23-24) and whose stroke makes it possible to move it between two positions o 14 2519880   it is respectively located next to one or the other tray.   9 Machine according to any one of the   1 to 8, characterized in that the feed chute S (34) is in the form of a chimney, the latter being provided, at its end opposite said   hollow bottom (35) of a filling door.   Machine according to any one of the   dications 1 to 9, characterized in that the two plates (23,24) are integral with each other and the assembly is pivotally mounted relative to the rest of the frame (2-3), which is fixed and which carries the evacuation chute (16) about an axis (31) parallel to that (X) of the rotor and disposed at the end of one (24) of the two   trays which is located opposite of this rotor.   11 Machine according to claim 10, characterized in that the distance separating the planes of the first (23) and second (24) trays is lower to the radius of the rotor (5).   At 20 12 Machine according to any one of   Claims 1 to 11, characterized in that the axis (X)   rotor (5) is horizontal and so are the two plates (23, 24) and the bottom (35) of the chute power supply (34).