EP1145850A1 - Folding unit for a web printing press - Google Patents

Abstract

The mechanism has a series of cylinders (1-3) and two adjacent folding hoppers (21,22) for longitudinal folding of sections of strip material that are fed into the folding mechanism. A third folding hopper (23) close to the first two performs longitudinal folding of sections of material for delivery to the folding mechanism. The folding hoppers can be moved longitudinally.

Description

The invention relates to a folder for a web-fed rotary printing press the preamble of claim 1.

Illustration folders are usually equipped with a former, feed rollers, Draw rollers and a cylinder group equipped to fold products with a Longitudinal fold and one or two transverse folds. Such a folder is in the Lithoman brochure, illustration web offset, page 20, MAN Roland Druckmaschinen AG, Augsburg, 2.97. The cylinder group contains one Knife cylinder, a puncture and folding knife cylinder, one Folding jaw cylinder and, if necessary, a gripper and folding knife cylinder. One or two additional 3rd folding devices allow an additional second Longitudinal fold. For a printing press, simply wide and simple in scope (i.e. 4 A4 pages in width and 2 pages in circumference), so products with 8 pages A3, 16 pages A4, 16 pages A5 double-sided and 12 pages delta fold or 24 pages of delta fold plus second longitudinal fold.

The desire is to add additional 4- or 8-page products (so-called envelopes). This can be done with a so-called Cutting unit reached in connection with an additional former become. Folding units with such an additional former are mentioned in the Brochure, shown on page 19. In this way, the well-known fold types 2 x 8 can be used Generate A4 pages or 4 x 4 A4 pages when using two formers. The used spelling of z. B. 2 x 8 pages A4 for two products with 8 pages each A4 is retained in the following. The same product extension can be with a complete additional so-called double-former folding unit realize.

The extension variants mentioned have some disadvantages. So condition additional tape deliveries, so-called disposal lines. Also strikes an additional space requirement to beech. This is how the double hopper folder is located in the Extension of the machine. There are also increased investment costs. Finally, the folding unit variants mentioned are in combination with 1.5 fold wide machines, e.g. B. 24-page machines, or all machines with through 3 divisible widths uneconomical. For example, with a 24-page press 4 x 4 A4 pages can only be produced with a 2/3 wide web.

The invention has for its object to provide a folder that with low technical effort and a high production variety allowed.

The object is achieved with a generic folding unit with the Means of the characterizing part of claim 1 solved. The Folding unit according to the invention enables to those described Production variants in addition to other production options. Also thanks to that Presence of three funnels leading z. B. 6 strands over one Hopper avoidable and thus good folding accuracy and quality can be achieved. In addition, the folder is inexpensive to produce and is characterized by a takes up little space. It can be economically spread from one 6 pages Web produce 4-sided products, e.g. B. when printing with a 24-page press 6 x 4 pages and 12 x 4 pages when printing with a 48-page press.

Further advantages and features emerge from the subclaims in Connection with the drawings.

Fig. 1:

ein Falzwerk mit drei Falztrichtern

Fig. 2:

den Schnitt II-II nach Figur 1

Fig. 3:

ein 24-seitiges Produkt

Fig. 4:

ein 4-seitiges Produkt der Produktion 6x4 Seiten

Fig. 5:

ein 8-seitiges Produkt

Fig. 6:

den Beschnitt eines Produktstromes.

The invention will be explained in more detail using an exemplary embodiment. The accompanying drawings show schematically:

Fig. 1:

a folder with three formers

Fig. 2:

the section II-II of Figure 1

Fig. 3:

a 24-page product

Fig. 4:

a 4-page product of production 6x4 pages

Fig. 5:

an 8-page product

Fig. 6:

the trimming of a product stream.

The folding unit shown in FIG. 1 contains a knife cylinder 1, a Puncture and folding knife cylinder 2 and a folding jaw cylinder 3. Optionally is the puncture and folding knife cylinder 2 a stapler 4 and Folding jaw cylinder 3 is a gripper and folding knife cylinder 5 for executing a assigned second cross fold.

A ribbon cable 6 leads from the jaw cylinder 3 to a copy switch 7. From the latter, ribbon lines 8, 9 go to a first paddle wheel 10 in addition first band line 11 or second paddle wheel 12 together with second band line 13 from. There are up to two in the belt deliveries 11 and 13, respectively Item separators 14 arranged. They continue to happen Band lines 8 and 9 each have a first and second 3rd folding device 15, 16, respectively each a third paddle wheel 17 and a third band line 18 and a Connect the fourth paddle wheel 19 and a fourth ribbon line 20 (FIG. 2).

Above the knife cylinder 1, the puncture and folding knife cylinder 2 and Folding cylinder 3 containing cylinder is a first former 21 arranged, in addition to that on both sides a second or third Folder 22, 23 is positioned. On the train path from the first former 21 to the puncturing and folding knife cylinder 2 are inlet rollers 24, pull rollers 25, a transverse perforation device 26 and a longitudinal perforation device 27 arranged. The second and third former 22, 23 close also inlet rollers 24.1, 24.2 and guide rollers 28 around which these funnels 22, 23 leaving strands 29, 30 also via the Cross perforation device 26, the longitudinal perforation device 27 and Draw rollers 25 to the puncture and folding knife cylinder 2. To the the Funnels 22, 23 leaving strands 29, 30 are each one Longitudinal gluing device 31, 32 adjustable.

The folding formers 21, 22, 23 are advantageous in their longitudinal direction, i. H. in the direction of the strands running onto it, movable. The first former 21 is advantageously 4 pages wide, to carry out the usual production on it can. The second former 22 and the third former 23 are advantageously 2 Wide sides, they are ready to part compared to the first former 21 executed, d. that is, they are only part of the width of the first former 21 on. However, the second former 22 can also be the full width of the first Have former 21.

The web (or webs) printed by a printing machine, not shown is cut into strands and guided to the formers 21, 22, 23. In Fig. 1 are over the funnels 21 to 23 examples of these strands to be fed with different locations. For example, 6x6 pages can be fed become. This means that each strand 29, 30 and 33 has two sides and contains a partial web 1 page wide. Furthermore, the scope of a Form cylinder arranged two pressure sides, whereby 2 x 6 for each strand Pages result. As a symbolism it should be explained that the one in the middle to the center line Strange line lying a 2-page wide web and that to the center line reaching dash represents a 1 page wide web. The strands with 6 x 8 pages z. B. obtained with 2-web operation of a 24-page printing press. The Both strands with 4 x 6 pages are used in single-web operation of a 24-page printing press received, with the two 1-side wide strands through Maintain a longitudinal section and lay it on the two 2-sided sections become.

The processing of 6 x 4 pages is explained below. The three each 2 sides wide strands 29, 30, 33 are cut according to the longitudinal section of a web a 24-page printing machine with a simple scope (i.e. two standing pages 6 pages in width) was printed. Strands 29, 33, 30 are guided over the former 22, 21, 23 and folded lengthways. The longitudinally folded strands 29, 33, 30 then pass through the Inlet rollers 24.1, 24 and 24.2. About the guide rollers 28 are the Strands 29 and 30 placed on strand 33. The superimposed strands 29, 33 and 30 pass through drawing rollers 25 and can pass through the Cross perforation device 26 and the longitudinal perforation device 27 with a Cross perforation and a longitudinal perforation. After this Passing further pull rollers 25, the strands 29, 33, 30 from Knife cylinder 1 in connection with the puncture folding knife cylinder 2 across cut, the cut signature in the running direction 2 pages, standing, having. The following of punctures of the puncture and folding knife cylinder 2 Recorded signatures are used by folding knives of the puncture and Pass folder knife cylinder 2 into jaws of jaw cylinder 3 and folded across. The resulting 24-page product 34 (1 x 24 pages) is shown in Fig. 3 shown. The top-folded products 34 are via the ribbon cable 6 to Copy switch 7 transported and there optionally on the ribbon lines 8 and 9 or 8 or 9 divided. With these ribbon cables 8, 9, the products 34 through the first and second 3rd fold device through the paddle wheel deliveries with the first paddle wheel 10 and the first ribbon line 11 and the second Paddle wheel 12 and the second ribbon line 13 fed.

The products 34 can be externally trimmed in which the cross fold and optionally also the area of the punctures 35 is cut off. This Trim is symbolically indicated in Fig. 3. After trimming arise six 4-page products 34.1 (6 x 4 pages) shown in FIG. The Trimming can be done, for example, with a familiar to the expert Rotary cutter done. Such a cutter cuts a product stream with rotating knives. A rotary cutter 42 is shown schematically in FIG. 6. In the present case, the product flow is initially 90 ° in its direction redirected. This is done by means of a connecting to the ribbon cable 11 Band line 11.1 with a transport direction rotated by 90 ° to the former. Of the product 34 now transported on the strip line 11.1 cuts Rotary cutter 42 from the cross fold and the area of the punctures 35, which in Transport direction lie to the side. The resulting 4-sided products 34.1 together Sectional waste 43 is shown. With a 48-page press (4 standing Pages in circumference, 6 pages in width) can twelve products 34.1 with 4 pages (12 x 4 pages). Two products are added to another Rotation of the puncture and folding knife cylinder collected and only then from Transfer the folding knife into the jaws of jaw cylinder 3. at two-lane operation are, for example, 6 x 8 pages of the formers 24, 24.1, 24.2 can be fed to six products with 8 pages (6 x 8 pages) are processable. The processing via three formers 21 to 23 also has the advantage that high number of layers that can be fed through a funnel can be avoided are, e.g. B. the management of six layers in two-lane operation over one Funnel.

By longitudinal displacement of the former 21 to 23 can be adjusted that this leaving strands 33, 29, 30 are not flush with each other when merging lie. This is in the Lithoman brochure already mentioned ... on page 19 for two Strands also shown. Which are already somewhat mutually perpendicular to the direction of transport Staggered products 34.2 (Fig. 5) can then continue using the Copy separators 14 laterally (transversely to the transport direction) are so that three mutually spaced product streams with products 34.2 can be generated with 1 x 8 pages. After external trimming (cutting the Cross fold) 2 products with 4 sides (2 x 4 sides) are created.

When passing the first and second 3rd folding devices 15, 16, the Products 34 can also be provided with a third fold (second longitudinal fold). The Delivery of these folded products takes place via the third paddle wheel 17 on the third Tape line 18 and the fourth paddle wheel 19 on the fourth tape line 20. Instead of which these folded products can only be opened via the fourth paddle wheel 19 the fourth ribbon cable 20 are stored (Fig. 2).

The variety of what can be created can be achieved by so-called bundle gluing Increase products even further. This is done by means of the longitudinal gluing devices 31, 32, the strands 29 and 30 close to that of the formers 22, 23 generated longitudinal folds on the side facing the strand 33 with a Apply glue line. When laying the strands 29 and 30 on the Strand 33 is then glued. For production with bundle gluing the former 22 to 23 in the direction of their longitudinal displaceability set that the longitudinal folds they produce when laying the Strands 29, 30, 33 lie flush on top of each other. When feeding 6 x 4 pages z. B. the 24-page product shown in FIG. 3 is then obtained, the three Signatures on the longitudinal folds are still glued.

As a further variant, the described three form former 21 to 23 folding unit containing can be supplemented with a cutting unit 36. To clarify the optional provision of the cutting unit 36 is this is dashed in Fig. 1 and with the item number in brackets specified. The cutting unit 36 contains two pairs of pull rollers 37, one Cutting cylinder pair 38, a ribbon line 39, a fifth paddle wheel 40 and one fifth ribbon line 41.

The strand 29.1 leaving the second former 22 becomes after passing through the inlet rollers 24.1 and a pair of pull rollers 25 to the Cutting unit 36 out. There it is closed by further pairs of draw rollers 37 directed to the pair of cutting cylinders 38, where it cut into products of 2 x 4 pages becomes. These products are accelerated by the ribbon line 39 and into the fifth paddle wheel 40 conveyed that the products on the fifth ribbon line 41st interprets. The strands 33, 30 longitudinally folded by the formers 21 and 23 become the knife cylinder 1, puncture and folding knife cylinder 2 and Folding jaw cylinder 3 guided. The former 22 and 23 can so far that the strands 33 and 30 next to each other in the Run in cylinder groups 1 to 3. The processing and display of the from the Strands 33 and 30 produced products 34.1 on the first and / or second Strip line 11, 13 takes place in the manner already described. There can be three Copy streams of 2 x 4 pages each with different print images can be generated. The delivery takes place on the ribbon lines 11, 13 and 41.

The invention was based on standing production (standing format) described. It is also with horizontal production (horizontal format) applicable, i.e. with the sides lying transversely to the running direction of the web.

Reference symbol list:

1

Knife cylinder

2

Puncture and folding knife cylinders

3

Jaw cylinder

4

Stapler

5

Gripper and folding knife cylinders

6

Tape line

7

Copy switch

8th

Tape line

9

Tape line

10

first paddle wheel

11

first tape line

11.1

Tape line

12th

second paddle wheel

13

second tape line

14

Copy separator

15

first 3rd folding device

16

second 3rd folding device

17

third paddle wheel

18th

third tape line

19

fourth paddle wheel

20th

fourth band leader

21

first former

22

second former

23

third former

24

Infeed rollers

24.1

Infeed rollers

24.2

Infeed rollers

25

Pull rollers

26

Cross perforation device

27

Longitudinal perforation device

28

Guide roller

29

strand

29.1

strand

30

strand

31

Longitudinal gluing device

32

Longitudinal gluing device

33

strand

34

product

35

Puncture

36

Cutting unit

37

Pull rollers

38

Pair of cutting cylinders

39

Tape line

40

fifth paddle wheel

41

fifth band line

42

Rotary cutter

43

Cutting waste

Claims (10)

Folding unit for a web-fed rotary printing press for illustration printing with a knife cylinder (1), a puncture and folding knife cylinder (2) and a folding jaw cylinder (3) as well as a first former (21) and a second former (22) next to it, via the web strands (33, 29) can be folded lengthways and then fed to the folding unit, characterized in that a third folding former (23) is arranged next to the first and second folding former (21, 22), can be folded longitudinally over the web strands (30) and then fed to the folding unit. Folding unit according to claim 1, characterized in that the folding former (21 to 23) are displaceable in their longitudinal direction. Folding unit according to claim 1 or 2, characterized in that the third former (23) has only part of the width of the first former (21). Folding unit according to one of the preceding claims, characterized in that a longitudinal gluing device (31, 32) can be placed on each of the strands (29, 30) leaving the second and third former (22, 23). Folding unit according to one of claims 1 to 4, characterized in that the products (34) leaving the folding unit are laid out on a first band line (11) via a first paddle wheel (10). Folding unit according to one of claims 1 to 4, characterized in that the products (34) leaving the folding unit are laid out on a first and / or second belt line (11, 13) via a first and / or second paddle wheel (10, 12). Folding unit according to claim 6, characterized in that the first or second ribbon line (11, 13) have the product of the ribbon lines (34) separating copy separators (14). Folding unit according to claim 5 or 6, characterized in that the transverse fold and optionally the area of the punctures (35) can be cut off from the products (34) designed by the first and / or second paddle wheel (10, 12) to form a product stream. Folding unit according to one of claims 1 to 4, characterized in that the products leaving the folding unit after passing through second 3rd folding devices (15, 16) via a third and fourth paddle wheel (17, 19) onto a third and fourth strip line ( 18, 20) can be designed. Folding unit according to one of the preceding claims, characterized in that the second folding former (22) is provided with a cutting unit (36) with a pair of cutting cylinders (38) which cut the web strand (29.1) that is fed in, and a fifth one which conveys the products obtained onto a fifth strip line (41) Paddle wheel (40) is arranged downstream.

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