FR2620073A1 - MACHINE FOR CUTTING WORKPIECES IN A BAND OF MATERIAL AND FOR JOINING WORKPIECES THAT HAVE BEEN CUTTING - Google Patents

Abstract

Mechanical construction. Machine for cutting a flat material into pieces and for their subsequent joining comprising a device for the movement and orientation of the cut pieces of a strip 14 which has an inclined table and a plate 24, provided with a stop for the front edge of a piece cut from a strip of material 14, mounted so that it can rotate around two horizontal axes. Application to the cutting of rubber bands.

Description

The present invention relates to the equipment used for the work of the

  flexible web materials including a machine for cutting strip of pieces in a strip of flexible material and for the subsequent joining of these parts. The machine according to the present invention can be used in the production of technical articles in

  rubber, particularly tire manufacturing.

  ticks as well as in the paper industry.

  A machine is known for cutting a strip of material and in particular a gummed fabric intended for the manufacture of cabled pieces and for joining

  later of these coins (USSR, A, l.065.240).

  This machine comprises, arranged successively following the course of the technological process: a device for feeding a band of starting material

  from a roll of this material in a direction

  rectilinear imposed; a diagonal cutting machine for the production of parts from this strip of O material; means for forming a web of finished material and a device for discharging the web of finished material in a rectilinear direction, transverse to the direction of web advance from the starting point to the machine diagonal cut. The device advancing the starting flexible material web from a roll of material comprises a spool, driven by a motor, on

  which is disposed a roll of this flexible material.

  The diagonal cutting machine has a mechanism

  cutting mechanism, mounted on a beam, equipped with a

circular knife.

  The diagonal cutting machine also includes a conveyor advancing the web of material unrolled to the cutting mechanism and photoelectric sensors for controlling the width of the cut pieces. The device for moving and orienting the cut pieces in a material web comprises an advancing member equipped with pneumatic suction cups and mechanical clamps mounted

on mobile trolleys.

  The carriage carrying the pneumatic suction cups

  is movably mounted in a horizontal conveying direction

  versale (perpendicular) to the direction of the advance of

the starting material band.

  The pneumatic suction cups are intended to lift the pieces cut from the web of material on the conveyor of the diagonal cutting machine. The clamps are intended to hold said pieces, cut in the strip of flat material, during the subsequent joining of their lateral edges and to move the band of finished material to evacuate it after

  completion of the operation of joining the lateral edges.

  The device for joining parts

  cut along their side edges and for

  of a finished flat material comprises a plate of

pressure and two stop plates.

  One of the abutment plates is mounted so that it can be oriented precisely with respect to the side edge of a cut piece, facing the discharge device of the finished flat material, while

  that the other stop plate is mounted so as to allow

  its precise orientation with respect to the side edge of the previously cut part, intended to join the first mentioned part. The stop plates are also mounted with the possibility of putting the parts in contact end to end and have a perforation connected to a source of vacuum to maintain, relative to each other, the edges to join cut pieces.

  The pressure plate is mounted vertically

  to clamp one on the other, the edges of the

  these cut out of a strip of material.

  The device for the evacuation of the

  0 finite material comprises a winding member, a rou-

  driving water advancing said web of finished material to said member and a spool with a motor. The known machine for cutting a strip of material into pieces and for their joining is provided with sensors for the control of the position of the cut pieces of the strip of finished material, sensors connected to the

  device for moving cut pieces,

  junction of the cut pieces and the device

  ! 0 evacuation of the band of finished material.

  In the known machine for cutting a strip of material into pieces and for their joining, the device making the displacement of the cut pieces of a strip of material is quite complicated and is not reliable in use because it comprises a multitude of elements that must operate in a sequence

  strictly determined and cooperate with parties

  determined said cut pieces.

  The suction cups are alternately connected to a source of vacuum and a source of compressed air. The clamps are intended to hold the cut pieces of a strip of material after the suction cups have made contact therewith, to move them in a direction transverse to the feed direction of the starting material web, then to separate successively, for

  to release them, the pieces cut after their junction.

  The device for joining the parts

  is also complicated. In addition, it is essential to precisely orient the pressure plates and the abutment plates with respect to the edges to be joined.

  cut pieces to obtain a good quality of the

  This results in significant maneuvering times. As a result, these features significantly lower the

productivity of the machine.

  It has therefore been proposed to develop a machine for cutting a strip of flexible material into pieces and for their junction in which the device performing the movement and the orientation of the cut pieces of the strip of material and the device for the joining of the cut pieces to be made in such a way as to

  ensure reliable operation with high efficiency.

  The machine according to the invention for cutting pieces in a strip of flexible material and the junction

  parts which have just been cut out

  sequentially following the unfolding of the technological process: a device for feeding a strip of flexible starting material from a roll of material in an imposed rectilinear direction; a diagonal cutting machine for producing parts from this material web, parts having lateral edges,

  anterior and posterior; a device for the

  cement and the orientation of the cut pieces in the

  material band; an orientable device for the

  cut pieces on their side edges and

  for the formation of a strip of finished material, this provision

  device comprising a pressure plate; a device for evacuation of the finished material web in a transverse rectilinear direction with respect to the advance of

  the starting material band; the device

  killing the displacement and orientation of the cut pieces, which leads the pieces that have just been cut to move in a direction transverse to the direction of advance of the starting strip, having an inclined table and a tray orientation disposed behind this table and provided with a guide stop movable in translation and steerable receiving the front edge of the piece that has just been cut, this plate being rotatably mounted about two horizontal axes, the first is perpendicular to the direction of feed of the starting material web and the second is perpendicular to the direction of the evacuation of the finished web of material; Table

  inclined and the orientation plate with

  forages connected to a source of compressed air; the disc

  positive junction of cut pieces in the band of

  a material having a spring plate for

  hold the side edge of a cut piece that is

  became the anterior edge after the change of

  tion of the movement of the pieces on the plateau of Orienta-

  rotatably mounted about a horizontal axis, and a movable bumper, disposed downstream of the spring plate, acting on said front edge of the cut piece, mounted so that it is possible to move it away and move closer to the scrolling material; the spring plate being provided with a bumper, disposed at a lower level than that of the movable bumper, acting on the lateral edge of the preceding cut piece which has become the posterior edge after the change of the direction of the

  movement of the pieces on the orientation plate.

  With this embodiment of the device for the displacement and orientation of the cut pieces of the material web, the automatic evacuation of the cut pieces of a web of material from the conveyor of the diagonal cutting machine is carried out by orienting precisely the cut pieces in accordance

  front and side edges in relation to the direction

evacuation.

  According to the invention, "air cushions" are produced between the cut pieces of the strip of material

  and the surfaces of the inclined table and the tray.

  These "air cushions" prevent adhesion

  cut pieces on the surface of the table and

  water and contribute to their easier

the inclined surface.

  According to a particular characteristic of the in-

  vention, the orientation plate, rotatably mounted around two horizontal axes, makes it possible to change in an easy and simple way the direction of movement of the cut pieces of the material strip at an imposed angle and to precisely orient the cut pieces

according to their edges.

  In addition, the presence of this plateau of Orienta-

  The invention enables the cutting parts to be oriented simultaneously, the feed of the starting material web and its cutting into pieces on the diagonal cutting machine, which significantly increases the efficiency of the machine. By mounting in the connecting device of the parts a spring plate, provided with a stopper, hinged about a horizontal axis and a movable stopper capable of moving away from and approaching the sequence of moving parts, it is ensured fast and precise positioning

  relative to each other respectively anteriorly

  of two consecutive pieces so that said edges of the pieces are arranged relative to each other with an imposed superimposition

  identical over the entire width of the pieces.

  In addition, it ensures the subsequent automatic application of the edge of the upper part on the edge of the lower part and the evacuation oriented a band of finished material without difficulties after clearing the stopper.

  According to a variant of the invention, the provision

  evacuation system of the finished material strip is provided

  of a mechanism of inversion of its displacement.

  The mechanism of inversion of the device for O the evacuation of the finished material strip cooperating with the bumper of the spring plate makes it possible to perform, in addition to the evacuation of the finished material strip from the junction device, the fast and precise positioning of a piece along its rear edge to ensure its joining with the next piece. It follows that the machine according to the present invention is characterized by high reliability and

high yield.

  The invention will be better understood and other O0 purposes, details and advantages thereof will appear more

  clearly in light of the following description

  of an embodiment given solely by way of nonlimiting example with reference to the appended drawings: FIG. 1 is a schematic side view of a machine for cutting a strip of flexible material into pieces and for their joining, according to the present invention, the strip of material being conventionally shown by a mixed IO broken line; - Figure 2 shows the same machine as that shown in Figure 1 seen from above with partial tearing; - Figure 3 is a side view along the arrow A of Figure 1; FIG. 4 represents a set B of the

  Figure 3 in enlarged scale, partly in section

  tudinale. The machine for cutting a strip of flexible material into pieces and for joining them according to the present

  invention will be named, in the description that follows,

in short: "machine claimed".

  The claimed machine is intended, preferably

  the cutting of pieces in a cloth gummed with cable, having the property of sticking to itself thanks to

  properties of the rubber, and for their subsequent

pool.

  The claimed machine comprises, arranged suc-

  on a frame 1 (Figure 1) following the course of

  of the technological process: a device 2 for feeding a starting strip 14, powered from a

  roll 3 of material, in a straight rectilinear direction

  EES; a diagonal cutting machine 4 for preparing

  parts from the strip of flexible material; a device 5 for transporting and orienting the cut pieces in the material web; a device 6 (Figure 2) for joining the cut pieces in the material web and a device 7 (Figure 2) for discharging the finished material web in a transverse direction in advance of the starting material web. The devices 6 and 7 are here arranged on the left of the devices 2 to 5 considering the direction of the arrow "C", but the arrangement on the right is obviously possible

  by modifying the operation of the device 5.

  The feed device 2 (FIG. 1) comprises a drive device 8 mounted on the frame 1 driven by a suitable electric motor. The device 8 is kinematically linked to a coil (not shown) on which is rolled a roll 3 of strip material.

departure.

  Device 2 also includes a compensation

  9 whose frame 10 is mounted on the frame 1.

  guide rollers 11, 12 are mounted at the upper portion

  top of frame 10 on both sides.

  The frame 10 also carries a roller 13 mounted so that it can move vertically while being guided by an element of the frame 10. The rollers

  11, 12, 13, whose axes are parallel to the axis of the wheel

  water 3, ensure the passage over them of the band of

  0 start 14 unrolled roll 3.

  The compensator 9 is intended to accumulate a suitable length of the material 14 when the roll 13 is in the lower position, during the cutting of the material 14 on the diagonal cutting machine 4, and to release it then during the ascent of the roll 13. A roll 15 is also provided for orienting the strip 14 towards the diagonal cutting machine 4, mounted therein

also on the frame 1.

  The diagonal cutting machine 4 has a horizontal belt conveyor 16, made according to a known design, mounted on a frame 17 fixed to the frame 1 and provided with a driving device 18. The strip 14 is driven by the conveyor 16 and passes between this

last and the roll 15.

  The diagonal cutting machine 4 comprises a beam 19 mounted above the conveyor 16 on the frame 17 with the possibility of moving in the direction of advance of the material web 14 (arrow "C", FIGS. 1 and 2). or in the opposite direction. The beam 19 is mounted with the possibility of rotating about a vertical axis 20 (FIG. 2) to cut the material 14

  according to a chosen profile forming an angle c, with the direction

  "C" of its progress. For the displacement and the orientation of the beam 19, all known means not described here are used for

simplify the presentation.

  A carriage (not shown), made according to a known design, displaceable on the beam 19, carries a circular knife 21 (FIG.

  moving the carriage along the beam 19.

  The diagonal cutting machine 4 is intended to prepare from a strip of material 14 pieces 22 (Figure 2) having side edges 22a, 22b, anterior

  22c and posterior 22d. Depending on the angle of the

  tation of the beam 19 with respect to the direction "C", the cut pieces 22 are cut into different parallelogram shapes (in the case shown they are

are rectangular).

  The diagonal cutting machine 4 can ensure

  different lengths at the side edges 22a, 22b, other-

  in other words, different widths to the pieces 22 thanks to the different possible orientations of the beam 19 by

  report to management "C" of band advance 14.

  The device 5 for moving and orienting

  The cutting of the cut pieces 22 of the material strip 14 comprises an inclined table 23 (FIGS. 1 and 2) and an orientation plate 24, arranged downstream thereof, provided with a guide stopper 25 for retaining the edge. previous 22c of the piece 22 which has just been cut

in the material band 14.

  The stopper 25 is constituted by a plate,

  designated by the same mark 25, arranged here perpendicularly

  cularily to the direction "C" of the advance. The plate 25 may be oriented relative to the direction "C" of the advance, to be made parallel to the beam 19, with the aid of adjustment devices 26 (FIG. 2) of a type comprising for example a set screw nut. The plate can also be moved parallel to the direction

  "C" in both directions to center piece 22.

  The inclined table 23 (FIG. 1) is mounted downstream of the conveyor 16 on the frame 1 by means of supports (not shown) and is inclined downwards in the direction "C" of the feed. The upper left edge (according to FIG. 1) of the inclined table 23 is disposed at the level of the upper band of the conveyor 0 16 while the lower right edge is at the upper left edge of the plate 24. In the case chosen, the angle of inclination downwards of the table 23 with respect to the horizontal plane is 120 while the angle of inclination towards the bottom of the plate 24 is

.5 5.

  The orientation plate 24 is mounted on a frame 24a (Figures 1, 3) installed on the frame i so that said plate can rotate about two horizontal axes 27 (Figure 1) and 28 (Figure 3). The first axis O is perpendicular to the direction "C" of

  the advance of the starting strip of material 14, the second

  xth axis 28 is perpendicular to the direction "D"

  (Figure 2) scrolling of the worked material 14a.

  The axes 27, 28 are mounted on the frame 24a using any suitable means not shown.

  The inclined table 23 and the orientation plate

  24 have perforations 60 connected to a source 29 (FIGS. 1, 3) of compressed air, for example a

  compressor of suitable design.

  A motor cylinder 30 allows the orientation of the plate 24 around the second axis 28; it is powered,

  for example, by the source 29 of compressed air.

  A photoelectric sensor 31 (FIG. 1) is intended to control the width (i.e. the length

  22a and 22b) of the cut pieces 22 in the

  14, and a sensor 32 (FIG.

  controlling the position of the front edge 22c of the piece 22.

  The photoelectric sensors 31, 32 are produced according to

  any suitable designs.

  The device 6 (FIGS. 2, 3, 4) for joining the cut pieces 22 in the strip of material 14 comprises a frame 36 mounted on the frame 1 so as to be oriented, by any appropriate means, under a desired angle with respect to the direction "D", for example

  the angle c of the cutting profile of the circular knife 21.

  On the frame 36 is mounted a spring plate 33 (Figure 4) for supporting the front edge of a cut piece 22 which was the side edge 22a of this

  same room before the change of direction of movement

  encircle from "C" to "D" on the orientation plate 24.

  The plate 33 disposed at a slightly

  lower than the plateau 21, and which can be

  surmounted by this plate 24, is mounted so that it can rotate about a horizontal axis

34.

  A movable bumper 35 (Figure 4), mounted on the frame 36 downstream of the plate 33, is provided to stop the front edge 22a of a cut piece 22. This bumper

  for example, in the form of an articulating plate

  abutted by its upper end 35a (Figure 4) on the frame 36 by an axis 35b and whose direction of retention makes with the direction "D" the orientation angle of the frame

36, for example the angle OL.

  A pneumatic cylinder 37 moves the stopper 35 around the axis 35b towards the lateral edge 22a or to disengage it. The spring plate 33 has a stopper 38 disposed below it and at a level slightly lower than that of the movable bumper 35, and which

  is intended to retain the lateral edge 22b, which has become

  In this case, to obtain a superposition of the respective front edges 22a and posterior 22b of the consecutive pieces 22 to be joined, the movable stopper 35 and the stopper 38 are staggered in their positions. retaining a spacing in the "D" direction

(Figure 3).

  i0 A pressure plate 39 (FIG. 4) is mounted

  in the gap E between the stops 35 and 38 with pos-

  sibility of vertical displacement in guides 40 fixed to the frame 36. The pressure plate 39 is secured to the rods of two pneumatic cylinders 41 fixed to the frame 36.

  A plate 42, fixed on the frame 36, is

  firstly to support the posterior edge 22b of the piece 22 during the reciprocal adjustment of the two consecutive pieces 22, then, in addition, the front edge 22a of

  O the other piece 22 and the force of the pressure plate 39.

  Photoelectric sensors 43, 44 (FIGS. 3, 4) are intended to control the position of the edges 22a

  and 22b neighboring pieces 22 to be joined.

  The device 7 (FIG. 3) intended to evacuate the finished material strip 14a has an inclined table

  fixed, according to the progress of the techno-

  downstream of the device 6 for joining the parts

  these on a frame 46 (Figures 2, 3) fixed on the frame 1.

  The inclination of the table 45, which goes down to the

6, can be modified.

  The inclined table 45 supports the rear portion of the finished material strip 14a. The inclined table 45 has perforations 61, connected to a source of compressed air 47 (FIG. 3). The inclined table 45 is provided with guide plates 48 (FIG. 2) disposed on the sides of the inclined table 45 so that it

  It is possible to adjust their spacing using

  positive setting 49, for example screw-nut type.

  A photoelectric sensor 50 (FIGS. 2, 3) is mounted above the table 45 for the control of the

joining of parts 22.

  A drive roller 51 of the belt 14a,

  disposed downstream of the inclined table 45 following the course of

  of the technological process, equipped with a reversing mechanism 52 (Figure 3), is mounted on the

built 1.

  The roller 51 is mounted so that it is possible to adjust its position vertically to ensure its crossing by the finished flat material 14a

without abrupt curvature.

  A guide roller 53 (FIGS. 2, 3) is mounted downstream of the roller 51 on the frame 46 and, behind the guide roller 53, is mounted a belt conveyor 54 and a device 55 for winding the belt. finished material 14a in roll. The roll is wound on a spool 56 provided with a drive device 57, for example an electric motor, mounted on the frame 58 (FIG. 3). A compensator may be inserted in the path of the strip 14a between the roller 51

and the carrier 54.

  The machine for cutting a strip of material

  in pieces and for their joining made according to the pre-

  This invention operates in the following manner.

  Before proceeding with the work, the beam 19 of the machine 4 of diagonal cutting is moved in the direction "C" of the feed of the starting material strip 14 of the imposed width of the pieces 22, and is oriented of a prescribed angle, about the axis 20, in the case represented by an angle equal to 90 relative to the

  direction "C" of the band 14.

  The photoelectric sensor 31 for controlling the width of the pieces 22 is mounted above the inclined table 23 of the device 5 for the movement and orientation of the cut pieces 22 so that the distance between the photo sensor electrical 31 and the circular knife 21 is equal to the required width of the

room 22.

  The guide stopper 25 of the device 5 intended to move and orient the cut pieces 22 with respect to the direction "D" is, with the aid of the adjustment means 26, oriented. parallel to the beam 19 and positioned according to

  the desired width of the pieces 22.

  The limiting plates 48 of the device 7 ensuring the evacuation of the finished material strip 14a are positioned by means of the adjusting devices 49 parallel to one another at a distance compatible with

  with the width of the finished flat material 14a.

  Then, we position the frame 36, which carries

  the spring plate 33, the stopper 35, the pressure plate

  And the stop plate 42, at an angle with respect to the direction "D" of the feed of the finished flat material 14a equal to the positioning angle of the beam 19 with respect to the direction "C". The source 29 is turned on to repress the compressed air towards the perforations 60 of the inclined table 23, of the plate 24 and

61 of table 45.

  The strip of starting material 14 is unwound

  of the roll 3 of material using the device 2 and

  next, along the rollers 11, 13, 12 of the compensator 90 and the roll 15, on the conveyor 16 of the diagonal cutting machine 4. Next, the conveyor 16 moves the starting material 14 in a belt towards the inclined table 23 in the perforations 60 which is repressed air

tablet from the source 29.

  At the moment the anterior edge of the material of

  start 14 in the form of a band passes under the photo-sensor

  electric 31 controlling the width of the pieces 22, a

  command signal is sent for the stopping of the

  16; the carriage carrying the circular knife 21 is

  moves along the beam 19, thereby cutting a piece 22 of the strip of material 14.

  After that, a control signal is sent for restarting the conveyor 16 to advance the starting material strip 14 for cutting a subsequent piece 22. The piece 22, which has just been cut, the part of which which is near its rear edge 22d is still placed on the feed conveyor 16, while the other part, near the front edge 22c, is already on the inclined table 23,

  is pushed by the conveyor 16 towards the surface

  drilled from the table 23 and slides following it and then the plate 24, on a "cushion of air", is separated from the

  strip of starting material 14 advanced by the trans-

  carrier 16 in the direction "C" to allow the cutting of a subsequent piece 22. The cut piece 22 slides to the stopper 25 and it directs the piece 22

by its front edge 22c.

  Due to the fact that the angle of inclination of the table 23 is chosen somewhat higher (12) than the angle of inclination of the plate 24 (50), the cut piece 22 is

  separates quickly from the strip of starting material 14 into

  between them a spacing necessary for the function-

  of the photoelectric sensor 31 controlling the width of the pieces 22, and the cut piece 22, slowed down on the lower slope of the plate 24, gets closer

  progressively from the guiding stop 25.

  From the signal outputted from the front edge position control sensor 32c 22c of the workpiece 22, the motor ram 30 rotates the platen 24 about the horizontal axis 28 upward by an angle of 8. according to

  a variant, we can first make the plateau 24 hori-

  zontal before tilting towards device 6.

* The cut piece 22 slides on the air cushion following the plate 24 while approaching the device 6 effected.

  killing the junction to the movable bumper 35.

  At the same time, the subsequent piece 22 of the strip of material 14 is cut off. This ensures the coincidence in time of the cutting operation of the

  subsequent Exhibit 22 and the advance of the previous exhibit

  cut in the direction "D". When the cut piece 22 strikes the movable bumper 35, a small wave (unevenness) of the material is formed in front of the device 6 effecting the joining, and the edge 22a is positioned more

regularly on the bumper 35.

  Then, the photoelectric sensor 44 sends the control signal to the pneumatic cylinders 41 for

  that they descend the pressure plate 39. In descending

  the plate 39 presses on the edge 22a of the piece

  cut 22 supported by the plate 33, which makes

  ash the plate 33 by rotating it around the axis

  34. Accordingly, the edge 22a is applied with overlap

  on the edge 22b of the finished material strip 14a on the backing plate 42 and associates with this

  band 14a by sticking to it.

  At the same time, the plate 24 is returned to its starting position. Once the junction is made, the pneumatic cylinders 41 raise the pressure plate 39, the stopper 35 is recalled by the pneumatic cylinder 37 and a control signal is sent for the start-up

of the roller 51 of the device 7.

  As a result, the finished piece of web material 14a is picked up by the rotating roller 51 and sent in the "D" direction by moving on an "air cushion" along the surface of the inclined table.

45.

  During its movement, the finished piece of strip 14a is oriented on the inclined table 45 between the limiting plates 48. Thanks to the inclination of the plate 24 relative to the horizontal plane in the direction "C" of the advance, the end of finished material 14a in tape

  moving in the "D" direction is constantly being

  while moving in the "D" direction against

  the bumper 25 and it is oriented by it.

  The finished material web 14a moves at a high speed through the junction device 6 and as the edges 22b pass under the photoelectric sensor 44 a control signal is sent for the inversion of the rotation of the roller 51 by the mechanism 52. At the beginning, the finished material strip 14a makes a certain path in the "D" direction and then, after the inverting mechanism 52 of the roll 51 is started, the finished material strip 14a returns to the reverse direction down the tilting table 45 to the stopper 38 of the plate 33 spring. At the moment the edge 22b passes under the photoelectric sensor 44, a control signal is sent for stopping the mechanism.

52 roll reversal 51.

  During the movement of the material web 14a in the reverse direction, a wave (unevenness) is also formed on the material web 14a as a result of being struck against the bumper 38, therefore the corresponding edge 22b is easily oriented. in accordance with

bumper 38.

  After the finished material strip 14a has passed through the junction device 6 at high speed, releasing the plate 24, the cutting process of the part

  22 of the starting material band 14 is

  mine. As a result, the next cut piece 22 arrives at

the tray 24.

  The junction of the pieces 22 in the band of

  finished material 14a is controlled by the photo-sensor

  electrical 50 which sends a control signal for O the stopping of the conveyor 16 of the diagonal cutting machine 4 if it detects a defect (a gap) in the

  junctions of the cut pieces 22 successive.

  The finished material web is advanced on the roller 53 to the conveyor 54 and then to the device 55 for winding the finished web of roll material 14a onto a spool 56 driven by the web.

device 57.

  Experimental models of the machine for cutting a strip of material into pieces

  O and for their joining constructed according to the present invention.

  have confirmed high reliability and high efficiency.

Claims (2)

  1. Machine for cutting pieces in a strip of flexible material, for example gummed fabric, and the junction of pieces which have just been cut out, arranged successively following the course of the technological process: a device (2) for feeding a strip of flexible starting material from a roll (3) in an imposed rectilinear direction (C); a diagonal cutting machine (4) for producing workpieces (22) from this web of material (14), workpieces (22) having side edges (22a,   22b), anterior (22c) and posterior (22d); a provision   sitive (5) effecting the displacement and orientation of the cut pieces (22) in the strip of flat material (14); a steerable device (6) for joining the cut pieces (22) to their side edges (22a, 22b) and for forming a finished material web (14a) having a pressure plate (39); a device (7) for discharging the finished material web (14a) in the rectilinear direction (D) transverse to the direction (C) of the feed of the starting material web (14), characterized in that the device (5) for the displacement and orientation of the cut pieces (22) of a strip of material (14) which leads the pieces that have just been cut to move   in a direction transversal to the direc-   the advance of the starting belt has an inclined table (23) and an orientation plate (24) disposed behind said table and provided with a translational and steerable guide stop (25) receiving the front edge (22c) of the piece that has just been cut (22), this plate 24 being rotatably mounted around two   horizontal axes (27, 28), the first of which is   to the direction (C) of the advance of the   starting material (14) and the second (28) is   pendicular to the direction (D) of the evacuation of the   finished material web (14a); in that the table inclines   born (23) and the orientation plate (24) have perforations connected to a source of compressed air (29); in that the device (6) for joining the cut pieces (22) in the starting material strip (14) is provided with a spring plate (33) for supporting the lateral edge (22a) of a piece cut (22) which has become the leading edge after the change of the   direction of the movement of the pieces on the plateau of ori-   rotatably mounted about a horizontal axis (34) and a movable bumper (33) disposed downstream of the spring plate (33) acting on said front edge (22a) of the cut-out piece (22) mounted way that it is possible to distance it and bring it closer to the material   in movement and in that the spring plate (33) pos-   a bumper (38) is disposed below it and at a level slightly below that of the movable bumper (35)   O acting on the side edge of the previously cut piece   dente which became the posterior border after   management of the movement of the parts on the orientation plate (24).   2. Machine according to claim 1, characterized   in that the device (7) for discharging the finished material (14a) is provided with an inversion mechanism (52) of his displacement.