DE1142368B - Process for the production of roller shells in pairs with positive and negative profiles that fit into one another, together with a device for carrying out the process - Google Patents

Description

GERMAN

PATENT OFFICE

D 26984 VIb / 15 b

REGISTRATION DATE: DECEMBER 7, 1957

NOTICE THE REGISTRATION AND ISSUE OF EDITORIAL: JANUARY 17, 1963

The invention relates to a method for the paired manufacture of roll shells with nested positive and negative profiles and a device for performing the Procedure. Usually two rollers are used here manufactured with smooth outer surfaces. Then one roller (embossing roller) is placed in the harder jacket the desired profiling is incorporated partly by hand, partly by machine using a molette this roller is then used as a tool for rolling its profile into the softer coat of the other Roller (counter roller) used.

This curling, which creates the negative of the embossing roller profile in the mating roller shell, is necessary high pressures and a correspondingly powerful design of the rolling device, for which one is usually one Embossing calender used. The difficult work of the profile in the embossing roller shell requires trained Manpower and a lot of time, so it is quite costly. Even in cases where there is a counter roll with a smooth outer surface with the embossing roller, which always has a profiling outer surface cooperates, the embossing roller is usually in the aforementioned manner with a jacket made of steel or a similar hardened metal.

However, it is suitable for the individual production of embossing rollers and other rollers with a profiled outer surface a fundamentally different process has also become known. After that, one becomes more natural The size of the original model of the roller jacket is a seamless hose model made of elastic stretchable material and after being pulled off the master model with elastic stretching used as a repeatedly usable hollow mold. In this hollow form, which has a negative profile Having inner surface, a core is then inserted and the remaining mold space with a sculptural and noticeable mass filled. Then the hollow shape, again with elastic stretching, is made Hardening of the filling compound removed from the resulting workpiece forming a roll shell, which has a positively profiled outer surface. A roll shell made in this way In practice, however, it cannot consist of a material that is as hard and at the same time tough as steel which one usually produces the embossing roller. It would therefore not be suitable as a tool to be used to roll its profile into the mantle of the counter roll under high pressure.

You could now have both the embossing roller and the counter roller shell in a separate operation according to the last-mentioned method, method for manufacturing in pairs

of roller shells with positive and negative profiles that fit into one another

together with device for implementation

of the procedure

Applicant:

Dornbusch & Co.,

Krefeld, Kalanderstr. 19-25

Dr. Paul Dornbusch, St. Hubert (Ndrh.),

and Dr. Horst Schwabe, Hanau / M.,

have been named as inventors

place. To do this, however, you would have to make a special master model and the profiling for each coat work out the two master models so that they fit together well. Because of this difficult and appropriate quite a costly labor would be the total manufacturing cost of the two roll shells are estimated to be at about the same height, as if they are one after the other according to the aforementioned usual process. The invention aims, with recourse to the aforementioned, but only known for the custom-made production of profiled roll shells, the process with Master model and hose model work, any mechanical incorporation of a profile into the outer surface of a model or an emerging work piece. She has accordingly set a task in the manufacture of roll shells with interlocking positive and negative Profiling get along with a single master model. This model can be in shape either a prefabricated roller with a profiled outer surface may already be present or with relatively small made of plaster of paris, wood or a similar easily machinable material will. These costs are only a small fraction of what you would expect for the usual mechanical Incorporation of a profile into the metal jacket of an embossing roller by hand or in the molet

209 758/1

must use animal procedures. After being known per se from the original model in the above-described If a seamless tube model is molded from elastically stretchable material, this is according to the invention Used in two ways as a hollow form. Namely once for the production of one Roll shell with positively profiled outer surface in the known manner. Second, however, is according to the invention in this hollow form another seam

bar is attached, for example with the help of wing screws 6. The lower flange 2 of the tube 1 and the upper cover 4 each have a pin collar 7 on their inside. Between the two coils 7 5 is a cylindrical and flexurally rigid screen jacket 8, which between itself and the tube 1 has a circumferential Annular space 9 leaves free to be clamped centrically. By a lockable provided on the pipe 1 Nozzle 10, the annular space 9 can be connected to a vacuum pump or the like (not a loose hose model made of expandable material, shown with io) and low wall thickness and positively profiled exterior - thereby creating a negative pressure in this, surface molded, after removal from the hollow mold The screen jacket 8. whose inner surface is exactly cylindrical

turned inside out and machined on all sides so far in the radial direction drisch. serves to accommodate a stretched seam, that its inside diameter is not the loose tube 11 with appropriately machined Cross-section that of the first 15 outer surface serving as a hollow shape, the inner surface of which has a positive or Hose model equals. The second hose has negative profiling. The one in the entrance Model serves as a hollow shape for the production of the opposite-described manner produced hose 11 is roll jacket, its profiling accordingly after removing the upper cover 4 in the sieve without each rework exactly put into the profile of the jacket 8 and then this cover on the in the first hose model produced roller 20 upper ring flange 3 of the pipe 1 screwed on, coat fits. Now the annular space 9 is placed under vacuum

During the introduction of a later roller set and thereby the hose 11 with its outer jacket forming hardenable mass in the associated surface against the inner surface of the sieve shell 8 hose-like hollow form must be taken care of by suction. If the hose 11 is the fact that the inner profile of the hose is 25 the aforementioned further hose model with nega clean molded into the filling compound and that acts on the tiver profiling of its inner surface, takes place outer jacket surface of this mass no bubbles stand. For this purpose it is advisable to take the two-radial direction. One can play the stretching style of silicone rubber, epoxy resin or process, if necessary, support that a similar plastic existing hardenable 30 through a connecting piece 12 in the cover 4 hot or cold Mass either under excess pressure into a static compressed air into the interior 13 of the hose 11 Fill in the hollow form and / or blown into it by Rüt-.

to compress or in a itself after the hose 11 in such a way on the

to throw in a rotating hose shape. In the last sieve jacket 8 is attached, its interior 13 case is the seamless tube shape, optionally 35 through a nozzle 14 in the lower cover 5 filled with a curable mass with corresponding expansion on all sides in the radial direction, the inward direction, in a centrifugal casting mold more common Air located outside space 13 is inserted through the upper nozzle guide and this is set in rotation. 12 can escape. After the hardenable material has been filled in, the hardenable mass can be introduced into the mass and the connection 14 can be closed in a known manner using a tube provided with a longitudinal slot, depending on its nature, by inserting it, if necessary, also in a gaseous or dripable tube. liquid heating or rotation is added, specifically appropriately in the ent coolant in the annular space 9 through the connection opposite directions of rotation such as the centrifugal casting mold. Bring 10 to harden. After removing the upper or lower cover 4 or 5 according to the invention, the filling with a resting hollow shape is a projection of the interior 13, which is suitable on its outer direction, which is finished on its end face profiled roll shell forms, together with the cover closable jacket tube, at a distance of
this one held by the cover sieve shell and a core at a distance from the sieve shell
contains, the central recesses of the cover 50
interspersed. For the purpose of creating a negative pressure in
the annular space between the jacket pipe and the sieve jacket
is a lockable one opening into this room
Nozzle for connecting a vacuum line and each

Another connection piece on the two covers, preferably a roller core 15, before filling see, which can be used in the annular space between the screen jacket and the hardenable mass.

the tube 11 removed from the mold. By pulling off the hose 11 you can then expose the roll shell.

In most cases it is advisable to provide the roll shell with a central cavity or to be produced sitting directly on a roll core. For this purpose, the covers 4 and 5 each receive one central hole in which a corresponding core,

Kern joins. Of the two last-mentioned nozzles, one is used to fill a plastic one and hardenable compound in the associated annulus and the other nozzle optionally for removal ventilation of the annular space or for the introduction of a compressed gas into this space.

In the drawing, an embodiment of the aforementioned device is illustrated in longitudinal section. 65

A strong, rigid jacket tube 1 has end flanges 2 and 3 welded to its end faces, on each of which a lid 4 or 5 rigid, but removable

Claims (3)

PATENT CLAIMS: 1. Process for the production of roller shells, of which the natural size executed master model of a roller jacket with a profiled outer surface a seamless hose model Molded from elastically stretchable material and after peeling off from the master model as a repeatedly usable hollow shape with negative profiled inner surface after inserting a core with a malleable and hardenable Mass filled and then from the through Curing of the filling compound produced and a positively profiled outer surface having workpiece is peeled off, characterized in that for the paired production of roller shells with positive and negative profiles that fit into one another, another seamless hose model with low wall thickness and positively profiled outer surface is molded from an expandable material from the hose model the first hose model is removed, turned inside out and stretched on all sides in the radial direction so that its clear cross-section equals that of the first hose model, whereupon workpieces in the form of roller shells in the aforementioned type are produced in both hose models. 2. The method according to claim 1, characterized in that the manufacture of a Tube model serving the roller jacket, if necessary with corresponding expansion on all sides Another hose model in the radial direction, placed in a centrifugal casting mold and the roll shell in question is manufactured as a centrifugal casting. 3. Device for performing the method according to claim 1, characterized in that that in a casing tube (1) which can be closed at its end faces by covers (4 and 5) at a distance from this tube a held by the cover sieve jacket (8) and at a distance from Sieve jacket a central recesses of the cover penetrating core are arranged that further for the purpose of generating a negative pressure in the annular space (9) between the jacket tube and Sieve jacket a closable nozzle (10) opening into this space for connecting a Vacuum line and one on each of the lids in the annular space (13) between the sieve jacket and Core opening nozzle (12 or 14) is provided, of which one nozzle (14) for Filling a plastic mass into the last-mentioned annular space (13) and the other nozzle (12) for venting this annulus or for introducing a pressurized gas into the annulus serves. Considered publications:
German patent specification No. 122051. 1 sheet of drawings O 209 758/1 1.63