DE2021097A1 - Method and device for feeding material to an automatic punching press - Google Patents

Description

Patentnnwäfts οΐρΐ, -ing. π. ι : κ: τ τ. son, 1-in ₃ . Ι-. : Λ o. ^ CHi

62-15.64ΟΡ 29.4ο1970

AUTOMOBILES PEUGEOT, Paris (France)

Method and device for material feeding to an automatic die cutting press

The invention relates to a method and a Device for feeding material to cutting presses, for the simultaneous cutting or punching of workpieces from several layers of flexible flat material such as felt, wadding or any other natural or artificial, woven or non-woven Material.

Bs are already material feed devices for Cutting or punching presses of this type are known; however, these known devices all have the serious disadvantage that you shut down the press for longer periods of time for the purpose of bringing in a new supply of material got to. This makes the utilization of the press considerable

62- (i5i / 7O) L-r (7)

109809/1265

is reduced, and as a result, the cost of the punched articles is increased. A © this known feeding devices is capable of receiving an attached to the press solid table that as much material rolls are like layers of material are processed simultaneously by the press, "If DI® have become empty for receiving the material given Solion, they are replaced by new material rolls replaced, and it is understandable that the time required for this exchange and for the introduction of the new material stores in the di © punching press is large and often greater than the time during which the press actually carries out stamping work.

To at least part of this machine dead time

Avoid ^ aasa has already suggested -two "Beschikkaagetisehe * in front of ssus eisen, v © n deiaera each one carries several rolls of material and which are arranged on carts or sledges, welefee can be moved across Zar Hichtiang 'of the material introduction in ciio Fresse» You can replace the Mollen of the © inea Beschiskungstischee during that time or at & e "fea.ussfe © n _t while the rolls of material of the other table are fed. This Asioffdsmag not conditioned jedloeia ®ia®n large Hansa needs and allows o @ to avoid the loss of time betrBelitlieaen !, üqt beira exact insertion d v geiaeiaaiam occurs to cause ^ beltonden layers of material into the press.

TAAG used szan & is BeQö3ai © fcaEagstiasli alii eaäleeer odoe * nsEsiauifomdesa EC ^-. SrOo ₉ of a ~ i £ sc-laea cfeei / ea Kettcntrois oisia itazoiii v @ m Iliaterialrsllesa T'E * Sg "ft ₉ s £ is de double iüisalnl of * bilateral ¹ Äiasztas ^ siaEoadea Ma »»

s ft r, i ί
© υ ο / i

s ft r, i ί 4 ί
© υ ο / id®

material layers corresponds. That way you can get the one Exchange group of rolls while the other group of rolls feeds the press. When these latter rolls are emptied, the conveyor is allowed to start up to remove the full ones Bringing material rolls into their working position or material delivery position in front of the press · This device has the same disadvantages as the device described above! the dimensions in this case are undesirably large in the direction of the material feed to the press Pulling the material layers into the press is time consuming.

The present invention is based on the object of eliminating the disadvantages described above and a To create a method and a device for feeding the material to an automatic punching / cutting press, in which the dead times that occur when changing rolls of material in the feed of the press are practical completely or at least very largely switched off

The subject of the invention is first of all a method for feeding a press which is used to simultaneously punch out punched objects from several layers of flexible material, the different layers of material being drawn off from rolls which are arranged on a conveyor as an endless revolving chain; there" The method according to the invention is characterized in that that each material layer is offset by a certain length relative to the neighboring material layer in the press introduces, which is equal to an integral multiple of the length of a "punch format".

The expression "S tanz format ¹¹ is to be understood as the section of a material layer from which each press

109809/1265

stroke of the punched object (s) are cut out, which the press makes.

Preferably, each ply of material is offset relative to the adjacent ply by a length approximately equal to L / n times the length of a die cut format, where L is the Length of the entire web of material wound on a roll urad η is the number of rolls from which the press is fed at the same time, or the number of the material layers captured at the same time with a die cut.

According to another characteristic of each material roll carries "a particular liquor of intended for punching material or Materialbahnj, which is an integer multiple of the length of a punch size" This latter measure isaeht ® & possible to avoid material losses that are caused by the fact that In the known feeding devices, the end waste parts, which are located at the end of a material band 8 introduced into the press for punching, are cut by the press, so that they are practically unusable as a result.

The invention also relates to a device for the work of supplying a press, which is intended for the simultaneous punching of η layers of flexible and flat material, which has a conveyor with an endless or revolving chain on which freely rotatable material rolls are disordered device being characterized in dßß mut the upper tram the conveyor η + 1 Materialrollea are arranged, the apparatus "ine means aufweist® the Attfwlekeizn a material to be punched ®m £ respective one of the Beechiskurags ·"

109809/1265

allowed to roll while the other rolls at the same time feed the press; and means for securing the free end of the roll wound on said roll Material on the material web of the preceding roll that has already been introduced into the press is arranged in this way is that the attachment takes place along 'in line, the on the material web that has already been introduced into the press, a dividing line between two adjacent punching formats is equivalent to.

Further characteristics and advantages of the invention will emerge from the following description of an exemplary embodiment which is illustrated in the drawing is. This example serves only to explain the invention in more detail and does not represent a restriction Drawing show:

1 shows a schematic perspective illustration a material feed device according to the invention for a multiple punch press;

Figures 2 to 6 are schematic representations of successive ones Phases in the operation of the device.

The device shown in Fig. 1 is for supplying material to a (not shown in the drawing) Punch press determined) it essentially comprises a frame 1 in which a conveyor 2 is housed is, which has two endless chains 2a and 2b, between which freely rotatable suitable for receiving tape material

1Ö9809 / 1266

net β rollers 3a, 3b, 3c, 3d, 3e are arranged. Of these Rolls unwind material webs 4a, 4b, 4c, 4d, 4e, being guided towards the inlet of the press · Each roller 3a, 3b, 3c, 3d, 3e carries a drive element 5; that with a stationary drive member 6 can be brought into engagement, which in turn is driven by an electric motor 7

The frame 1 also carries a frame 8, on whose, Upper part of the longitudinal guide rails 9 and transverse guide elements 10 are arranged »The longitudinal guide» βchienen 9 carry a stop lying transversely to the material web ab 11 and an adhesive device 12 for connecting the the free end of a material web with a central area of the other material web.

In the feed direction in front of the loading table T, such as

it has just been described as an essential part of the device according to the invention, a sswide frame 13 is arranged, which, however, can also be built directly into the frame 1 if necessary Bales of material are unwound, for example a web of material 15 »which is wound up on the rollers 3 & to 3e in order to then be fed to the press from this roll. The frame 13 also contains a banjal-length measuring device and a cutting device, shown as a pair of scissors.

The mode of action of the material just described - hTvovTlcHtnMg is & nf ^ T and the Dar a divisions in the. 2 to 6 explained!

1ÖS8Ö9 / 128S

When using this device, a material supply roll i4a, in which the web length of the wound material is not exactly covered, is first inserted into the unwinding device 14 and the front edge of the material tap 15 located on this roll is attached to the initially empty material roll 3a, which initially aa the left end of the loading bag T and its drive element 5 is in force-transmitting contact with the drive element 6. If, by driving the feed roller 3a, a certain length of material is wound onto it, which corresponds to a certain number of punching formats - what is raessened by the heating device 16 - is the scissors t? _f UK · to cut the material web 15. Then, the conveyor 2 is turned on so that it brings into the position geatß Fig. 3 which is provided with material roll 3 and the web k * _t to be subtracted from this roll is in the direction of the Press sucked out "Then the empty roll 3b is on the unwinding device 1 *" j. A web of material is then also wound onto this roll, the length of which is equal to the length of material previously wound onto the roll 3a.

When a length of material has been unwound from this first roll 3a which corresponds to 1/5 of the total length of the material band wound on this roll, and the roll 3b is fully wound, the conveyor is moved again by one roll pitch so that it is in position according to FIG. k coamt. The free end edge of the material web 4b is then pulled forward up to the stop against the stop 11 and connected to the material web 3a of the first roll with the aid of the tacking device 12, which extends in the transverse direction of the web along the stop rod 11

109809/1265

· As a result, the attachment line a is located on 1/5 of the length of the material web of the roll 3a and at the border between two adjacent die-cutting formats.

The same process is then repeated, as shown in FIGS. 5 and 6 , from which nan can see that the material webs kc and kd are successively attached to the immediately preceding material web, with a length paneling between two adjacent material webs that adheres to the is equal to 1/5 of the total length of the web on a roll «

Venn finally the role 3e, which is located in Fig. 6 at the "winding point", in turn from the. To take up supply roll i4a a certain section of the material web, provided with this material web and the web km is fixed on the web kd , the device has reached its normal working state, as it is shown in Fig. 1. In this state the material rolls 3a feed or charge to 3e at the same time the punch press.

The processes described above for the winding of the individual rolls of material then become more and more important Follow "without interruption, so that the empty rolls of material are automatically replaced by newly wound rolls of material replaced and rewound for their part.

As is apparent from the foregoing description, the webs of material used in a row consecutively arranged rollers 3a to 3e run off, offset or staggered by a length, the equal to an integer and constant multiple of the

109809/1265

Punching format is} the roles are also fuller, the further away they are from the feed of the face. If each roll should deliver a number of X punching formats and if nan wants to punch η layers at the same time, then the length graduation corresponds to between two neighboring material layers have a value of X / n punch formats. In other words, this same length graduation is at a material web length of L wound onto a full feed roll is equal to a length graduation value from L / n.

The advantages of the method and the device that have just been described are

The punch press is loaded or fed continuously, since the next roll to be processed is refilled during the continuous supply of material to the press and each new material web is attached to the preceding material web in that time interval that is available between two press strokes.

The loss of punching material is eliminated, since each of the material rolls takes up a web length which is equal to an integral multiple of the length of the punching format; it follows that the ones left over from the supply rolls Length sections that are shorter than the format length do not get into the press at all. she are consequently not cut by the cutting or punching tool and are consequently for others Purposes well usable. This results in a material saving that is by no means negligible.

Finally, as a further advantage of the invented

109809/1265

Dungsgeatässer device call those who have aind that their requirements for surface space compared to the known material xuf ührvor directions are very much lower.

IU9809 / 1265

Claims (1)

Claims JiJ method for the material supply su a punching press , in which several layers of a flexible sheet material are punched at the same time, whereby the different layers of clay material rolls are drawn off, which are arranged on a conveyor with a circulating chain, characterized in that each material layer (! la to km) relative to the adjacent material layer in the longitudinal direction staggered by a length that is equal to an integral multiple of the length of a "punch format" (the material length sucked in for each press cut). 2 · Method according to claim 1, characterized in that each material layer is relative to the neighboring The material layer is staggered by a length that is approximately L / n times the length of a standard format, vobsl L is the length of the web of material wound on a roll of material and η is the number of rolls of material that feed the press at the same time, or the number of layers of material punched at the same time 3 · The method according to claim 1 or 2, characterized in that the front end of a material layer attached to the previous layer of material during the normal intermediate time between two press operations. 4. The method according to claim 1 or 2, characterized in that one length of the to each roll of material 109809/1265 «Dancing material winds up an integer Is a multiple of the length of a die cut format. 5 · Device for carrying out the method according to claim 1 or device for loading a punching press, in which at the same time η layers of a flexible sheetlike material are punched and which contains a conveyor belt of an endless chain on which material rolls are freely rotatable, characterized in that η + 1 material rolls (3a to 3f) are arranged on the upper run of the conveyor (2); the device a device (6, 7) which allows the material to be punched to be wound onto one of the feed rollers (3f), while the other rollers (3a to 3e) feed the press at the same time; and means (11, 12) case fixing the free end of the material wound on said roll (3f) to the ready The material web (Ue) of the preceding Bolle (3 *) introduced into the prasse is arranged in such a way that the fastening takes place along a line which is on the already in The material web introduced into the press corresponds to a dividing line between two adjacent punched foroats. A device according to claim k, characterized in that each priority roller (3a to 3f) carries a drive element (5) and the device contains a drive mechanism (6, 7) which can be coupled to or from the drive element of each of the Kalian they can interact when the corresponding rope (3f) is in a certain position for the purpose of winding up all material web sections. 10 9 8 09/1265 7. The device according to claim k, characterized in that the device for attaching the free end of a material web to the preceding material web includes a stop rod (11) and at least one clip or tacking device (12), both of which are arranged above the conveyor (2) are* 8. Apparatus according to claim 6, characterized in that that the stop rod (11) and the or each stapling or tacking device (12) in the longitudinal direction of the Conveyor (2) are adjustable 9. Apparatus according to claim 4, characterized by a device (14) for unwinding supply rolls (i4a) of the material to be punched, a measuring device (16) for measuring the length of the material web (15) »which is unwound from the supply roll and wound onto a roll of material (3f) which is located on the conveyor (2) »and finally a material web cutting device (17) · 109809/12 6 5