FR2508378A1 - FLOW ROTATING DECK INSTALLATION - Google Patents

Abstract

ROTARY BLANK CUTTING MACHINE, ESPECIALLY INTENDED TO BE USED IN A CORRUGATED BOX SHAPING UNIT. IT IS EQUIPPED WITH A DEVICE 7 TO 12 FOR INTERMITTEN GRINDING OF THE COUNTERPART CYLINDER 6 INCLUDING A TOOL 9 LIKELY TO MOVE PARALLEL TO THE LONGITUDINAL AXIS OF THE SAID CYLINDER. IT IS ALSO EQUIPPED WITH A DEVICE 18-19 FOR DRIVING THE FRICTION COUNTERPART CYLINDER FROM CUTTING CYLINDER 2.

Description

The present invention relates to a rotary cutting machine of

  blanks, intended in particular for use in a

  forming unit of corrugated boxes.

  In general, a rotary cutter of blanks made of

  essentially consists of two superimposed cylinders with horizontal axes

  zontal and parallel The first cylinder, called the "cylinder

  tools "or" cutting cylinder ", carries sharp cutting tools

  pe and the upsetting tools corresponding to the shape of the box in

  The other cylinder, called the "counter-part cylinder" or "cy-

  anvil lint ", is a cylinder coated with a flexible coating, such

only polyurethane.

  In the process of operation, the cutting tool enters the re-

  flexible garment of the counterpart, and by cutting effect cut the cardboard sheet driven continuously between the two cylinders, the latter themselves being rotated by the general movement of the machine In currently known machines, the

  between the two cylinders is fixed and ensured by a

transmission transmission.

  In order to obtain a satisfactory cutting accuracy

  it is necessary that the circumferential speeds of the two cylinders be as close as possible to one another. This condition can only be realized if the counterpart cylinder has a perfectly cylindrical shape, without irregularities in diameter.

  along its longitudinal axis, in particular due to the wear of the coating

polyurethane.

  On the other hand, in the case where the cutting form bears

  non-cutting nets for the upset of the cardboard plate,

  differences in diameter due to wear of the coating are

  to the regularity of the refoulage.

  The rotary cutting installation in accordance with the invention does not have these disadvantages. It makes it possible to suppress the

  irregularities in diameter of the counterpart cylinder, while preserving

  the same circumferential speed for both cylinders.

  It is of the type comprising a device allowing to bring the

  counter cylinder of the cutting cylinder by self-movement

  parallel counterpart of the counterpart cylinder, and is characterized in that it is equipped with an intermittent rectification device

  of the counterpart cylinder comprising a tool capable of

  parallel to the longitudinal axis of the cylinder, and in that

  that it is also equipped with a training device for the said

  counter-part linder by friction to come from the cutting cylinder.

  The invention will be better understood from the description

  following of a nonlimiting embodiment, with reference to the accompanying drawings in which: Figure 1 is a rotary cutaway perspective view of the invention Figure 2 is an enlarged view of

pant installation of Figure 1.

  FIG. 3 is a diagrammatic view of FIG. 1; FIG. 4 is a schematic view.

direction 11 of FIG.

  FIG. 5 is a frictional perspective view of the installation of the invention; FIG. 6 is a diagrammatic perspective view of the installation of FIG.

the equilibrium tool

longitudinal section of the whole

in cross section according to the

schematic of a first

counterpart cylinder of

a second variant of training

  by friction of the counterpart cylinder.

  Referring to all of FIGS. 1 to 4, the rotary cutting installation of the invention comprises a carrying frame 1, an upper cutting cylinder 2, provided with a tool holder 3 and tools (4 5) and a lower counter-roll 6 coated with

  classic, with a soft polyurethane coating.

  According to the invention, the cutting machine comprises a sliding support 7, bolted to the frame 1 and parallel to the axis 3

  cylinders (2,6) on which a rectification head can move.

  8 supporting a cutting tool 9 for scraping the cylinder 6 The head 8 can move along

  the slide 7 parallel to the axis of the cylinder 6 with the aid of the

  conventional nut 10, endless screw, and drive motor 12.

  rotation of the screw 11, shown in FIGS. 1 and 2.

  As can be seen in detail in FIG. 2, the rotation in the trigonometric direction of the counterpart cylinder 6 causes it to be stripped by scraping by the tool 9, provided that

  of course that the cylinder 6 is sufficiently close to the head

  grinder 8 This approximation is obtained and adjusted using the

  an eccentric device equipping, in a manner known per se, the installation

  cutting section, and intended to bring the counter-cylinder 6 of the cutting cylinder 2 in a self-parallel manner in order to adjust

  the penetration depth of the cutting tools (4,5).

  The rotation of the cylinder 6 during the rectification operation

  using the tool 9 can be obtained simply by

  dragging the machine by the general movement of the total

  In the example described here, the

  machine is assumed to be separate from the rest of the installation during the

  rectification, so that the rotation drive of the en-

  samble during the rectification phase is performed from a

  auxiliary electric motor 42 driving in rotation, via

  toothed pinion 13, the toothed pinion 14 for driving

  of cylinder 2 and consequently, as will be explained below,

  The pinion 14 is precisely the one which, when the

  China is in place in the overall shaping plant, is

  dragged by the general movement of said installation.

  The pinion gear 14 rotates the cylinder 2 to the

  of a shaft 15 and bearings (16,17) The other end of the

  15 carries a wheel 18 of diameter equal to that of the cutting tools (4, 5) In the same way, the lower cylinder 6 is extended, as can be seen in the drawings, by a wheel 19 placed under the wheel 18, and therefore resting on it, of diameter equal to that of the cylinder 6 and coated with the same flexible polyurethane coating that the latter

  or a soft cover of the same type, that is to say soft enough to

  see being rectified by tool 9 to the same degree that this rectifies

  the cylinder 6 Moreover, the slide 7 is of sufficient length

  for the tool 9, in its transverse displacement, to come

  the wheel 19 is exactly the same diameter as the cylinder 6. Furthermore, as on conventional machines, the toothed gear 14 meshes with a pinion 20 of the same diameter that rotates, by means of a bearing 21, around an eccentric pinion 31 whose angular position is adjustable by means of a gear device 32, chain 33, pinion shaft 34 and crank 35, the

  elements 31 to 35 are symmetrical to the other end.

of the cylinder 6.

  The eccentric shaft 22 of the cylinder 6 rotates in the two parts.

  31 with the help of bearings 23 On the left side with respect to

  gurea, it is rigidly connected to the wheel 19 and on the right side it is

  connected by means of a freewheel 24 to a drive pinion 25

  born in meshing by the internal toothing of the pinion 20, as shown in FIG.

d on the drawings.

  The operation of the device is as follows: When the user believes that, given the wear of the coating

  of the cylinder 6, a grinding operation of the latter is necessary.

  In this case, the cutter shown is isolated from the forming assembly and the motors 12 and 42 are started. The cylinder 6 is thus rotated in the direct direction, while the grinding head 8 moves alternately from left to right along the screw 11, then right

  left along it by reversing the direction of rotation of the

  For this operation, the operator has adjusted, using the

  level 35, the relative positions of the cylinder 6 and the tool 9, so as to grind said cylinder as well as the wheel 19: it generates

  therefore with the tool 9 on the cylinder 6 a perfectly cylindrical shape

  than, but of slightly smaller diameter.

  Despite the decrease in diameter of the cylinder 6, the speed

  circumferential to it remains, thanks to the device of the invention

  tion, strictly equal to that of the cutting cylinder 2 Indeed, as the cylinders 2 and 6 were of diametrically equal,

2508378 -

  the gears 14, 20 and 25 gave angular velocities and Yi

  circumferentially equal tesses for both cylinders

  After the grinding operation, the cylinder 6 has a diameter

  be weaker, so that the latter is then trained,

  greater angularity but at unchanged circumferential speed,

  by friction of the wheel 18 on the wheel 19, rectified to the same diameter

  being the cylinder 6 The pinion 25 is no longer involved because the wheel

  free 24 triggers, its angular velocity being greater than that of

  said pinion 25 Then, the pinions 20 and 25 only work in

  case of an incident creating a strong overcurrent, and thus a slowdown

of the whole -

  It will be noted with interest that the approximation of the cylinder 6 with respect to the cylinder 2 is effected by means of a device with

  eccentric, this rapprochement does not take place in a vertical

  cal, but in an ascending circular motion, that is to say that the cylinder 6 moves not only upwards but also

  forward in its close-up operation, which makes it possible

  It is thus very advantageous to carry out the grinding operation. Thus, the necessity of bringing the lower roll due to the wear of its coating into the rectification operation in accordance with FIG.

The invention.

  It goes without saying that, after the rectification operation, the operation

  The controller locks the crank 35 in a position allowing cutting

  flans and it will be noticed that, by this operation, we guarantee

  tit the good support of the wheel 19 on the wheel 18, and therefore the good effect

friction training.

  Figures 5 and 6 schematically show two examples

  possible variants of driving the lower cylinder by means of

  from the upper cylinder, associated with the rectification of the invention, these two variants being in particular intended to be used when it is not possible, either for lack of space, or because one operates on a old installation, to place wheels

  such as wheels 18 and 19 at the end of trees.

  In the variant according to FIG. 5, the cutting cylinder 2

  is equipped at both ends with hagues (50,51) which lead directly

Z 508378

  In the case of large format sheets, the rings 50 and 51 are then removed.

  so that the cylinder 6 is driven by the wheel system

  24 and gears (20,25) described above, which is at least

  dre importance because a very precise cut is not necessary

for large formats.

  Figure 6 shows another possible variant of

  The cylinder 6 is frictionally pressed from the cylinder 2. In this case, a belt 52 is rolled in opposite directions as shown around the cylinders 2 and 6, and then around a wheel.

reference 53.

  The invention is obviously not limited to the examples which

  have just been described. In particular, the rectification device

  (7 to 12) may very well, instead of being

  permanently lodged on the chassis A of the machine, to be mounted on a mobile support so that it can be detached from the machine outside the grinding phases. The same device can also be permanently placed on a fixed station against which the rest of the machine machine carrying the two cylinders would come

  fix, the chassis i being generally provided with rolling means.

Claims (7)

  1 l Rotary Blank Cutting Plant, Com type   carrying a device for bringing the cylinder closer to   part (6) of the cutting cylinder (2) by means of a self-parallel displacement of   said counter-cylinder, characterized in that it is equi-   a device (7 to 12) for intermittently rectifying the counterpart cylinder with a tool (9) movable parallel to the longitudinal axis of said cylinder, and in that it is furthermore equipped with of a device (18-19, 50-51, 52-53)   driving said counter-part cylinder by friction to shot of the cutting cylinder.   Rotary cutter according to claim 1, characterized in that it is furthermore provided with a device   driving the counterpart cylinder by the cylinder of   eg pinion gear 14,20,25) and freewheel (24), said device   being constructed so as to drive said cylinder   against the counterpart by said cutting cylinder when these have equal diameters.   3 rotary cutting device according to claim 1 or claim 2, characterized in that said friction drive device comprises a first wheel (18) fixed at the end of the shaft of the cutting cylinder, and of diameter equal to that of the tools, and a second wheel (19) placed at the end of the cylinder shaft   counter-part, under the first wheel (18) so as to be in   thereon, said second wheel being coated with a material of the same type as the one coating the counterpart cylinder, and said   wheel (19) is further pladée on the path of the tool rec-   (9) so that it can be ground to the same diameter than that of said cutting cylinder.   4 Installation according to claim 1 or claim 2, characterized in that said friction drive device   has one or more rings (50,51) surrounding the cylinder of pe (Figure 5).   Plant according to claim 1 or claim 2, characterized in that said friction drive device comprises at least one belt (52) winding in opposite directions around the two cylinders (2,6) and then around a return wheel (53, Figure 6).   Installation according to any one of the claims   I to 5, characterized in that the rectification device (7 to   12) is attached to said installation and that said device   tif to bring the two cylinders together is a tif to eccentric (31 to 35).   Installation according to claim 6, characterized in that   what said grinding device is detachable from the- said installation.   8 Installation according to any one of claims 1   a 5, characterized in that the grinding device (7 to 12)   is mounted on a fixed station, against which the machine comes to desolate   dariser for rectification operations. l