DE1552689C

DE1552689C - Process for the production of a thin metal file to be glued to a base

Info

Publication number: DE1552689C
Authority: DE
Inventors: Der Anmelder Ist
Original assignee: Stedmg, Richard, 5880 Ludenscheid
Publication date: 1972-04-27

Claims

ι 2

The main patent 1 299 492 relates to a method. The subject matter of the invention is shown in the drawing

for the production of a thin metallic, explained in more detail on one using an exemplary embodiment.

Negative form electrolytically as a deposit of hard F i g. 1 a and 1 b show a greatly enlarged

metal, preferably hard nickel, built-up foil scale a produced without or with etching

for use as a file, disc or 5 negative form,

cylindrical support to be glued on with F i g. 2 a tool layer that can be pulled off using the cutting teeth protruding on the negative, preferably with the shape built-up, is made of a file-like tool that runs parallel or curved, and
optionally showing crossing lines F i g. 3 shows a perspective view from below of the toothed strips and cavities between them, in the case of the tool layer with a cross-shaped course of the first for generating the negative shape on cutting edges.

The negative form (Fig. la and Ib) consists of an insulating layer in the form of the filing to be produced - a ground metal plate 3, on which the tooth image is applied, whereupon an insulating photographic bath is applied in an electrical manner Metal deposit on the layer copied from an image and developed layer-free areas using the occurrence, so that between their exposed hardened the side growths in the form of given areas 3 ° at the unexposed areas slot-like, if at their edges, gap-like protrusions Openings 3 ^d remain, at which the surface cracks are formed, after which the surface with one of the metal plate 3 is exposed (Fig. La),
electrically conductive separating layer is provided and this 20 The metal plate 3 can also (Fig. 1 b) in negative form to form the film again in a known manner as a die when using an electrolytic bath. Here ER- inverted image submission to the unexposed areas was handed to the use of hard metals, are deeply etched forward, and the thus obtained distortion, hard nickel, tieften for these films already hardening of rooms 3 wervon filled "with insulating material 3" to C to 60 Rockwell The practical testing 25 den. In this case, too, are the middle has shown that with foils of these material parts 3 ^d after grinding the plate surface quality not only relatively soft materials, but free. If the plate 3 is already in a galvanic bath, much harder materials, such as Mes, can be removed as a result of the side wax ring. turns according to the teaching of the main patent also the

The invention has set itself the task of increasing the 30 insulating parts 3 ^d overlapping projections 3 ^b , and this hardness of the foils still significantly, and the process is continued until the edges are so that you can also use them with larger materials of the neighboring Projections 3 ^Ö with the formation of a hardness, such as steels, is able to remove, again touch with acute angle β. The surface has the advantage that the surfaces produced are then also polished with a separating layer (not shown), but the foils are also provided so on 35, e.g. B. design by treatment with ammonium that they grip significantly sharper, even bichromate, or chrome-plated. This means that if the negative is only a smooth and not polish-smooth upper form for the formation of removable foils 1,
create surfaces. Takes place according to the method according to the invention

The invention solves this problem in that the formation of the end foil 1 in two work processes, electrolytic structure of the foil a hard metal 40 First, the negative form is coated in an electroless coating of the working metal coating bath provided with the separating layer (chemical Reduk negative form in itself known Way in a tion bath) treated. In this way, a very currentless working metal deposit bath (before a hard foil surface, which also precedes a very hard mixed reduction bath) is obtained, whereby essential materials are attacked. This is due to the very sharp, higher degrees of hardness of the 45 projections l ^d , which work as a tool and which delimit the cavities l ^c , when the top layer is reached. It is true that the user is involved. This is followed by the build-up of the backward manure of such a chemical reduction bath because large areas are produced which compensate for a very large number of individual tool areas, such as in a 50 of the work shift 1 'higher cost.

there are files to be divided. The subsequent one can build up the required total film thickness in the electrolessly generated metal coating layer 1 ', even galvanic bath, which is deducted from the negative form.
now a cheaper metal, such as copper or soft _Ώ
nickel, find use, so that even the end claims:
product much cheaper than previously produced 1 method for producing a thin is. metallic, electrolytic on a negative form

Another possibility to increase the hardness 60 as a deposit of hard metal, preferably

the electrolessly generated metal deposit hard nickel, built-up foil for use

can be brought about by the fact that the as on a file, disk or roller-shaped

Negative form peeled off metal deposit underlay to be glued on with protruding

a known cutting teeth that run under the application of heat, preferably with the

is additionally subjected to the hardening process. It 65 form of parallel or curved,

it has been shown that the hardened lines produced in this way may have intersecting lines -

Foils with degrees of hardness of about 75 Rockwell C preserve the toothed strips and cavities between the

and remove very hard materials. sen, in which initially to generate the negative

Form an insulating layer in the form of zu on the sanded surface of a metal plate Generating file tooth image is applied, whereupon a metal deposit in an electrolytic bath at the layer-free areas, taking advantage of the lateral growth that occurs in Form of projections, possibly in contact with one another without a gap, formed at their edges, then provided the surface with an electrically conductive separating layer and this negative form is then placed again in an electrolytic bath to form the foil, according to German patent specification 1299 492, characterized in that the electrolytic Structure of the film a hard metal coating of the negative mold provided with the separating layer in a manner known per se in an electroless metal precipitation bath (chemical Reduction bath).

2. The method according to claim 1, characterized in that the ^{metal deposit layer peeled off from the negative mold (3, 3 &} ) is subjected to a known hardening process with the application of heat.

1 sheet of drawings