DE2342488A1 - Paper-perforator with die - has hard metal working part insert above support part, and thinner, with bevelled edges - Google Patents

Abstract

The machine used for perforating paper has a die part assembled from two or more superposed flat bodies with holes to accommodate the punches which make the holes in the paper. Its upper, working part is of e.g. hard metal, and the carrier part only has to withstand the remaining stress, for which cheaper soft metal is adequate. Preferably the working part is screwed to the lower part for easy interchangeability, and is thinner than the lower part in a ratio between 1:2.5 and 1:3. The two upper long edges of the die and of the working part, and the abutting edges of the parts of the machine which carry the die, are bevelled, to prevent jamming of the machine while in operation.

Description

Perforator for perforating machines «,

3in perforator for perforating machines, which uses the The subject of the present invention consists essentially of the die in which the perforating program corresponding holes are introduced, and the associated, the perforation causing and with it the corresponding needle or punch part · The entire apparatus is depending on what is involved The work program in the machine can be changed.

The template, known to be a flat materially homogeneous Ketallteil has a thickness of, for example, a total of 11 mm _{e o} The material is tool steel ".

The to be punched Good, usually paper contains, for reasons of strength weighting agents, such as · kaolin · These additives have on the Perforierapparate highly adverse side effects, and _§ namely in that they have ochleifeigenschaften, the increased wear or · change in shape of both the llatrizenlöcher as well as the punches in the wake have »Both holes - like needles - have to be brought back into a condition appropriate to their tasks by means of laborious processing at short intervals of time. In the case of the die body, this correction is carried out by costly drawing in the die edges of each die hole, each of which has a certain area of destruction

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only at the manufacturing company, where only specialists > Knowledgeable through many years of experience to be able to carry out this difficult overhaul work. Particularly These problems are precarious abroad, where such specialists are hardly available. The consequence is that the User companies were forced to send their device to the manufacturer - especially from abroad seen from here «- with quite considerable transport and freight expenses as well as expenses, customs difficulties and Fees was associated. So there was a compulsion to keep several devices ready for use «All that was, as I said, with considerable costs and with an investment capital that should not be underestimated tied together"

The object of the invention is to eliminate these disadvantages and difficulties. It is characterized by that the die part of the perforating apparatus is made up of two flat bodies lying next to one another is, and that the upper, the working part of the die body is made of an extremely high-quality material steel exists, while for the lower, the support part only the usual strength loads material that has to be withstood, e.g. a lower grade, is used. Another hallmark the invention is that the upper, the working part, with the help of simple connecting means (e.g. screws) can be separated and exchanged from the lower part

Details of the subject matter of the invention are given below

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described on the basis of the drawing; show it

Figure 1 is an enlarged sectional view of the perforating apparatus in the previous embodiment;

FIG. 2 shows a cross section through the perforating apparatus according to the invention;

FIG. 3 shows a partial cross-section through the die

with commitment ^
Figure 4- Longitudinal vertical section through the die (division) The conventional design of the perforating apparatus 1, in particular the die, is characterized by a flat, materially homogeneous metal part 2. The material is normally tool steel, the thickness is 11 mm, for example.

Since the material to be punched, mostly paper, has weighting agents such as kaolin, contains, and these additives have significant abrasive properties have, there is an increased wear and tear or change in shape within a short time the die holes 6 as well as the punch 7 (Figure 1). This is a disadvantageous consequence in the figure shown. The die opening 6 a (continuous cylindrical opening) and the stamp shape 7 a (pure cylindrical shape up to the effective end of the punch) show the initial, i.e. normal state for the perforator. This means that in this state a perfect, clean shearing or -a © fee3 »e -» - of the hole is reached and guaranteed. If there are now increased signs of wear and tear and

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change to how it was done at the die opening. 6ft and are indicated by 7b on the punch, a clean and perfect shearing is no longer guaranteed and also no longer possible at all, it rather shows - due to the cone formation 9 of the punch 7b ^ ^{m area of} action c, and the hole expansion 8 of the die in Area t - a piercing process with an unsightly frayed edge on the back of the product. It is therefore necessary to bring the punch and die back into a state that corresponds to their tasks within a relatively short time by means of a complex process Die body 2 (see FIG. 1) are effected by an expensive drawing in of the iliac die holes 6t, each of which has a certain area of destruction t. The difficulties and disadvantages that result from this have been dealt with in detail in the introduction to the present description .

To remedy this if eight hurry is required according to the Invention of the die part 2 (see Figure 2) from two or more flat bodies lying one above the other 3 and 4 assembled, in such a way that the upper, the working part 3 of the die body 2 is made of an extremely high-quality material, e.g. carbide or hardened steel, while for the lower flat body or bodies, that is to say for the carrier part or parts 4, only one Material that can withstand normal strength loads is used further development of the invention that

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d'ir upper, ie as ο the working part 3 ₅ with the help of simple connecting means, eg by screws 5 »at any time from the lower, the carrier part 4, can be separated and is exchangeable. The upper working part 3 has in relation to the lower carrier part 4- only a small thickness a, approximately in the ratio 1: 2.5 or 1: 3.

To the material to be punched 13 (Figure 2) In order to be able to introduce it without interference, it is advisable to use the two upper longitudinal edges of die 2, i.e. the edges of the working part 3 bevel as indicated by "14" The part of the machine that carries the Hacrize, i.e. the Part 15j beveled.

In certain cases it is useful to use the r.afcrize or the entire perforating device

q
In accordance with the die length and direction, i.e. in all its superimposed parts, evenly subdividing each other. When performing certain perforating work, large-format printed sheets can be used which - due to temperature and humidity - are subject to expansion and shrinkage processes. The changes have in particular In the outer surface area of the print area to be perforated, the print images are displaced in relation to the perforation lines. This is mainly the case with postage stamps

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that through the perforator; fixed program a considerable disturbance is experienced by the distances ("especially in the outer arched areas) between the perforation line and the edges of the individual printing (postage stamp) Moving pictures ^ resulting in intolerable problems The shifts in the direction of the material are compensated for in modern machine designs, in the transverse direction Errors of this kind in the direction of travel of the material have not been possible so far The elimination of these deficiencies is the object of the Invention which consists in the fact that a single or multiple division of die # 3,4- (see fig 4-) and with it conforms to the stamp carrier plate 21 and the guide apparatus in the direction of travel of the material, i.e. transversely to the longitudinal direction of the die.

Any necessary correction of the perforating device is done by the fact that ζ.Β.in a Tripartite, as is the case with the one mentioned Postage stamp sheet perforation recommends that left part 16 (see Figure 4) to the left and the right part 17 to the right according to the elongation (or vice versa in the case of shrinkage) until a sufficient correction is obtained. The parts are at the Separation points connected by bridges 19, which of course any displacement and Enable fixation of the set additional scan Dmeses correction procedure lets fall; even with a conventional one Apply Hatriaen build-up.

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A tilt or tilt of the needle guide bar 12 (see Fi ^ ur 2) in their support in the machine - even if they would only be very marginal - to prevent the reproaches 7 from escaping, namely if the guide plate 12 would not lie exactly parallel to the die plate 5-4 when the punches 7 go down they do not hit the hole 6 of the die plate exactly (because of the angular alignment), they were rather in the conventional, not made of hard steel dies knock out the edges of the hole so that a kind of elongated hole would arise cause unclean punching. With the die design according to the invention according to the two-layer or multi-layer process with an upper hard steel plate 3, the needles became incorrectly aligned In order to now ensure that the guide plate 12 is firmly seated and that it is exactly Holding the die in parallel to achieve - will be in further training of the Invention fixes the guide plate 12, like a printing device in FIG. 2 20 (arrow). This ensures a fixed position of the guide plate 12 The retention (pressure) can be ensured e.g. by a Toggle device with cone or a healing device can be achieved.

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When a state of wear and tear is no longer acceptable, as shown in Figure 1 with the die hole 6b and the punch 7 ^ is achieved is, the thin worktop 3 (Figure 2) of the die 2 is separated, and over its whole Surface ground flat, whereby the Grinding depth of the depth t (Figure 1) of the area of destruction 8 corresponds to the die within the Lochräöder. This work can without difficulties and without any prior technical knowledge in any workshop or knife sharpening shop be carried out with the usual grinding devices Methods are also part of the invention.

The lormv er changes en j & iden 9 dex- otempel 7b are made usable again in the usual way, i.e. around the conical part c sanded off.

For special perforating tasks, e.g. for the Execution of large holes of about 4 mm diameter and more, with larger distances the holes can be used in place of the thin worktop for füa? a narrower die hole hairline a mostly cylindrical insert 10 made of extremely high quality material, e.g. carbide are let into the die body (Figure 3), the other material 11 from can consist of an inferior quality steel.

The holes in the 1-Iatrizenkörper.er have for easier removal of the punched out

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Waste in the exit area down one larger diameter or a larger opening cross-section, as shown in Figure 2 at 6 It is recommended to use these holes or these holes in the mätrifcenschichten to be produced or carried out separately.

All of this results in considerable cost and time-saving advantages

First of all, it is no longer necessary to use the to send the entire apparatus to the manufacturer or to the appropriate company in order to .. there by experienced specialist specialists (toolmakers) in a proper way and bring it to usable condition The cut of the thin 3 "worktop (see Figure 2) are available in every country of use. I? Ian therefore saves the transport costs and - seen from abroad - the Customs fees for the transport of the complete apparatus the repair can be done in a much shorter time, but that means a lot fewer perforators have to be kept ready for use and the investment cost share can be significantly reduced. Also a material saving compared the previous execution of the perforating apparatus results from the fact that only one

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low Yolui & en extremely high quality and expensive material ^ for the thin countertop of the die the much thicker one ± 'r ag he would have a lower material quality Finally, it enables the inventive. Matrices from— guidance, replacement orders and deliveries of the thin working die parts »much easier and faster to do and execute.

Due to the design according to the invention of the die part thus result in a number of significant ones for the perforating apparatus Advantages that are not only economic in nature, but also in the end clean and proper perforating work enable.

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Claims

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Claims (1)

- ΛΛ - Claims Perforator for perforating machines, thereby g.e ke η η ζ ei c h ..- n et, that the Katrizteil (2) from two or composed of more superimposed bodies (flat bodies 3 and 4) is and that the upper, the working part (5) of the die body (2) from a extremely high-quality material, e.g. carbide, exists, while for the lower, the carrier part (s) (4) only the usual strength loads Resistant material is used. 2. Perforating apparatus according to claim 1, characterized in that that the upper, the working part (3) with the help of simple connecting means, E.g. screws (5) can be separated and exchanged from the lower part (4). . Perforating apparatus according to claims 1 and 2, characterized in that that the upper, the working part (3) of the die body (2) in relation to . lower, the carrier part (4) only a smaller thickness (a), approximately in the ratio 1: 2.5 or 1: 3. . Perforating apparatus according to Claims 1 to 3, characterized in that that the two upper longitudinal edges of the die (2), i.e. the edges of the above "* - 12 -509810/008 0 lying working part (3), as well as that adjoining edges of the Maeefetrize bearing parts (15) of the machine, are bevelled. 5. Perforating apparatus according to claims 1 to 4-, characterized in that that iij & ie die in the area of the hole (6, Figure 3) a - mostly cylindrical insert (10) is embedded, which consists of consists of an extremely high quality material. 6. perforating apparatus according to claims 1 to 5, characterized in that the die (3, 4 in Figure 4-) or the entire perforator compliant, i.e. in all of its parts lying one above the other (3 »4 and 12 and 21) evenly overlap, is divided transversely one or more times in their longitudinal directions. 7 · Perforating apparatus according to claim 6, d a characterized by, that the parts (16,18,17) are connected at the separation points by bridges (19), which allow any movement of the parts to each other and a fixation. 8. perforating apparatus according to claims 1 to 7, characterized in that that to achieve a tight fit of the guide plate (12) and to keep it parallel opposite the die (2), the guide plate (12) is fixed, e.g. by a pressure or pressing device (20, Figure 2) - 13 - 509810/0080 9 · Procedure for the repair of worn and no longer serviceable Die according to claims 1 to 8, characterized thereby e i c h η e t that only the upper working part (3) separated from the carrier plate (4) on its surface, if necessary, it is sanded flat with the simplest abrasives, where in general the grinding depth is the depth (t in Figure 1) of the area of destruction (8) corresponds within the hole edges of the die. 10. Method for making the holes in the multilayer die according to claims 1 to 8, characterized by the fact that the bores or the production these holes, which generally have different diameters, be carried out separately for the matrix layers. 509810 / Ü080