DE1963311A1 - Embossing disks and process for their manufacture - Google Patents

Description

"Embossed disks and process for their production"

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The invention relates to dies and, more particularly, to discs useful in embossing machines to emboss heavy plastic articles and stamping aluminum alloy articles.

There are numerous Prageä. Again known, which in embossing machines are usable. For example, U.S. Patent Nos. 2,973,853, 3,029,920, and 3,293,691 Machines shown which precision machined, individually use deeply attached male and female sets. machinery of these types work satisfactorily and enable rapid embossing of objects such as plates of heavy weight Plastic material and aluminum alloy plates from which address printing plates and the like are made.

Both masohines of the type mentioned and the associated ones Embossing and die bodies are suitable for mass production and work below a degree of accuracy which is above

Hansmann, Dipl.-Phys. Sebastian Herrmann 8 MÖNCHEN 2, THERESIENSTRASSE 33 · Telephone · 281202 · Tilecjramm-Adreiia. Upalll / Munich Bayer. Vereinsbank Munich, Zweigit. Oikar-von-Millar-Ring, account no. 882495 Poiticheck account: Munich No. 163397

ORIGiNAL INSPECTED

There are also relatively cheap and manually operated ones Machines that are suitable for embossing letters on soft plastic tape. Machines of this type work also with discs on which block letters are formed and which are used to insert letters into the soft plastic tape to coin. Machines of this type are usually by pressure operable. The relatively soft plastic material, which is shaped by machines of this type, can easily be deformed and therefore does not subject the disk to any great wear or pressure. Machines of this type however, are not suitable for embossing hard plastic plates or aluminum alloy plates such as those used for Address plates are required. One reason for this is that they are not applying enough pressure. Another is that the letter washers are not strong enough in order to be able to make repeated embossings without the printed letters deforming, wear out or break.

Adressendruclrpl & li ,, _ ii are made with plastic mass and / or Brass solder or hard solder filled in order to increase their life expectancy and around materials of different compositions to be able to shape or condition. However, metal with this backfill is not suitable for an embossing body suitable.

According to the present invention, a sheet steel body is embossed or reshaped in such a way that it is itself an embossing tool represents, which is used for embossing printing plates made of plastic blanks or aluminum blanks.

According to the invention, a disk with embossed letters or Male letters equipped with a washer with The die or die letters located thereon interacts. The letters of both discs are not subject to wear or tear, even after repeated stamping.

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supply of hard plastic or aluminum plates, which are suitable as address printing plates.

According to the present invention, a disc has radial outward-facing pingers, which are raised, letter-forming Surface parts on one side and corresponding depressions on the other side .The depressions are filled with a pressure-resistant material to prevent the printed letters from breaking in during repeated embossing processes to avoid. The invention also resides in a method of making these disks.

The invention is explained with reference to the accompanying drawings.

FIG. 1 of the drawings is a plan view "of a blank which is used to produce an embossing disk ¹⁵ IZW. A male disk according to the present invention; FIG.

FIGS. 2 and 3 are partial views of successive process stages;

Figure 4 is a top plan view of the next stage of the process; Figure 5 is a sectional view taken on line 5-5 in Figure 4;

Figure 6 is a schematic sectional view * of manufacture an embossed letter on one of the fingers of the disc;

Figure 7 is a partial plan view on an enlarged scale single finger of a disc with printed letters on it;

FIG. 8a is a sectional view from line 8-8 in FIG before grinding;

FIG. 8b is a sectional view taken along line 8-8 in FIG after grinding;

Figure 9 is a top plan view of a blank suitable for making a disc body;

FIG. 10 is a top plan view of the disk body according to FIG FIG. 9 after initial processing;

Figure 11 is a sectional view taken on line 11-11 in Figure 10;

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Figure 12 depicts part of the disc in a later Procedural section;

Figure 13 is a partial sectional view from line 13-13 in Figure lh and shows in schematic form the preparation of a closed-die or Matrizenbuchstabens in one of the fingers of the disc;

FIG. 14 shows, on an enlarged scale, part of the Disc shows on which printed letters are reproduced on the fingers; and

Figure 15 is a top plan view of a portion of the finished one Disc with die or die letters on it.

The invention consists in the creation of male and die plates which are suitable for embossing. the Letters located on the patrix or embossing disk do not deform or are not subject to cracking when hard sheets of plastic material or aluminum alloy. Plates of this type are used as address printing plates.

In a device from the applicant, which is part of the US registration Ser.No. 784 558 from December 8th, 1968, becomes a couple used by embossing disks, one of which has a facer body, while the other has die body. The disks are normally rotatable at a distance from one another and with one another held to a desired set of male and female Die bodies in a certain embossing position to an embossing point respectively. The object to be embossed is at the embossing point or article inserted between the male and female mold bodies; the disks are moved towards each other while Pressure on the corresponding male and female part is exercised to emboss the intermediate article. Although the present invention is particularly directed to the device of the type mentioned is applicable, the use should not be limited to that. The embossing plates or patrix and

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plates according to the present invention can in the same Way to be used in other embossing machines, in which Embossings are carried out repeatedly, and mean a high wear and tear resistance of the male body is desired.

In Figures 1-8b of the drawings are sequential Process steps in the production of an embossing disk according to the present invention shown. In Figure 1 of the drawings the blank 10 is shown, from which the stamping bodies arranged on the disc are formed. The disk blank preferably consists of a lower or medium carbon steel, for example from an AISI 1070 steel, which has been annealed. Usually that requires Washer 10 holes for fastening, for the arrangement of tools and for setting devices. Because of this, the opening 12 located in the middle together with for the Holes 14 used to hold tools are punched; Likewise, an opening 16 for insertion into the Stamped plate.

After the openings or holes 12, 14 and 16 are punched were (Figure 2), teardrop-shaped slots 18 in the disc body punched. The slots 18 end shortly before the outer edge 20 of the disc 10. The outer edge body is then separated from the disc 10, as can be seen from Figure 3, the Drawings results. The disc consists of the one shown in FIG The shape shown consists of a central part 22 from which fingers 24 extend.

After the edge body has been cut off, the end of each finger is bent over in an L-shape, as can be seen from FIGS of the drawings results. That way is on each of the Finger provided one end 26 for receiving printed letters. The ends used to receive the printed letters £ 6 are parallel to the plane of fingers 24, but in one staggered position.

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If the ends 26 are shaped to receive printed characters or printed letters, said printed letters can be shaped therein. This is shown in somewhat schematic form in Figure 6 of the drawings. A male body P and a female body D are shown on the opposite sides of the end 26 of one of the fingers 2h . Both male and female mold bodies consist of precision-machined, tempered tools, which are relatively massive and therefore suitable for the desired printed letters or printed characters on the finger

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of the disc. This is done through an embossing process at end 26 of the finger. When the female and male bodies are pressed together with the end 26 in between, the desired block letter is formed by embossing the required configuration 28 of the letter on one side of the end 26. Accordingly, one remains Well 30 on the other side.

Each of the fingers shows a block letter or a pressure mark, i.e. that the raised part is on one side of the finger, while the recess is on the opposite side comes to lie. The raised parts of the letters are the stamping bodies, which together can be used with the corresponding die bodies in order to an embossing machine to emboss printed letters on the respective, desired objects.

Annealed, 5 low or medium carbon steels are preferably used in the embossing of letters, because it is relatively easy to shape the letters with the help of male and female molds. But when Embossing bodies, made of annealed steel, are used to make hard plates made of plastic material or aluminum alloy The printed characters or printed letters used for the embossing can be embossed after a relatively small number of embossing processes already be pressed in.

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The metallurgical experience would avoid this disadvantage avoid causing heat treat the discs, to harden the steel. But if medium carbon steel is heat-treated to the hardness required for embossing without wear or break in the printed letters, cracks occur in the printed or embossed letters, if these are used for embossing hard plastic or aluminum plates.

The use of a material of greater strength and toughness for the embossing disks, for example alloy ' steel, leads to the fact that the printed letters are poorly formed, and that the for making the letters serving cartridge and die body are worn out very quickly. Because of this, it is harder to use Material not suitable for embossing discs.

To the low or mid. => ■ To be able to use carbon steel in such a way that the printed letters on the embossing disk do not break in during repeated embossing, a pressure-resistant filler material 32 is applied to the rear surface of the ends receiving the printed letters. The material 32 fills the depressions 30 on the back of the letters. Any filling material can be used for this purpose; brass alloys, for example, have proven to be particularly suitable for preventing printed letters from breaking in or being indented. Investigations on embossed bodies made of medium carbon steel which are filled with brass alloy have shown that the printed letters are capable of over 30,000 embossings, and even aluminum plates can be embossed satisfactorily. Brass alloys can be applied in a conventional manner in the form of a brass solder paste. After the paste is applied, the fingers of the disc are heated so

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that the alloy melts.

Another filler material that can be used is epoxy resin impregnated with iron powder. Epoxy resin fillers are found to be satisfactory for hard embossing Plastic plate} when stamping aluminum alloy plates however, the printed letters have the tendency to turn inwards break,

Usually the filler material will be a little round in shape applied how; is shown in Figure Sa of the drawings * Since this surface is the counter surface for the embossing process,. i.e. it is in contact with a printing surface, should it be in the be ground off in Figure 8b manner, so that it is flat with the surface of the end 26.

If filling material is used, it is advisable to heat treat the disc material where it is in shape is redesigned by embossing bodies. This is intended to improve the properties of the parts used for embossing will. This happens either before or after the filling material is applied, depending on the particular filler. if the filling material made of an epoxy material that hardens at room temperature or of another, at low temperature hardening material, the heat treatment should be carried out before the filler material is applied will. If, however, a brass or Brass solder alloy is used or another suitable one Material that requires high temperatures to melt may heat treat the disc after application of the filler material. If the heat treatment is done after the padding, the results will be the Heat treatment or tempering is not falsified or impaired by the temperature to which the pane is exposed in order to melt the brass solder material. In any In this case a hardening and tempering treatment is desired, which increases the hardness of the stamping material to such an extent that. this wear and tear, i.e. a rounding off

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stands. However, the material should not be designed as hard that cracks appear with repeated embossing. In the case of AISI 1070 medium carbon steel, can it is hardened to a Rockwell C hardness of between 44 and 47 and be remunerated. In this way becomes a material achieved, which resists rounding and wear, but which is not brittle enough to with repeated Embossing showing cracks.

Thus, according to the invention, the back of the embossed letters arranged on a disk was filled with a filler material, to prevent breaking in when embossed.

The embossing disk according to the present invention can be used in an embossing device with a die disk or a Die washer are used, the die body of which corresponds to the die body are adjusted. In Figures 9 to 15 of the drawings are the various process steps in the manufacture of a Die plate shown, which with the invention Male washer can be used.

A blank 40 is used as the starting point for the manufacture of the die bodies. The blank 40 is preferably made from a medium carbon steel; However, an alloy steel can also be used, as the die bodies are through Embossing or countersinking are manufactured and not according to the manufacturing process, as it is used for the embossing disk.

The disk 40 has a * in the center hole 42, holes 44 and an opening 46 for adjustment purposes. The disk 40 is machined so that it has a stepwise stepped hub portion 48 and an annularly arranged. Section 50 has. The annular portion 50 is located near / to the outer edge 52, as shown in FIGS. 10 and 11 of the Drawings can be found. .

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Teardrop-shaped slots 54, which correspond to those at dbr Manufacture of the blank 10 are provided on the disk 40 and extend beyond the ring 50, but not to the outer edge or to the outer edge 52. In this way (FIG. 12) interconnected fingers are formed, the raised areas 50 'of which are segments of the Ring 50 represent. In each of these raised areas 50 ' is a matrix letter or a matrix character in front of> see. "

The production of a matrix printing letter or matrix printing character is shown schematically in FIG. 13 of the drawings. For this purpose, an embossed body P ^{1 is} used, on which the desired printed letter is provided. The embossing body is used together with a counter body B in order to countersink the desired printed letter in the raised area 50 '. It is a common stamping or countersinking process in which a cavity is formed within the metal. In the embossing process according to FIG. 13, only one embossing body or male mold body P ^{1 is} used, that is to say not both male and female mold bodies, as has been described with reference to the method according to FIG. As a result, the countersinking process has less of a wear effect on the tools, which is why a tougher material such as steel alloy can be used for the disc. FIG. 14 of the drawings shows a segment of the disk with embossed letters thereon.

After all embossed letters or die letters have been made in the raised areas, the outer Edge cut off. As a result, a disk is formed, from the central region 56 of which fingers 58 are directed radially outward are. A raised area 50 'is provided on each of the fingers, in which the desired embossed characters or Embossed letters are provided (Figure 15)

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The die plate formed in this way can used with the male washer already mentioned are «The description is only an example of a form of a die that can be used with an embossing disk * · disk »as well as its manufacturing process. It is Obviously, other disc shapes and other manufacturing processes in the same manner are within the invention can be used.

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Claims (1)

Prägeschcribeiij protruding from a pair of embossing characterized by the fact that pingers (2A) extend outward from a central portion of the disks ^ that one of the disks (10) has the shape of a patricial disk _{f in} that letter-shaped patrician bodies are provided on the fingers * that each of these is for embossing P'atrizfen body serving letters is formed from a raised surface part (28) on one side of the finger (24) and from a corresponding indentation (30) on the other side of the finger, so that a material (52) which can withstand pressure loads within the indentation ( 30) is arranged that the other of the disks (40) has corresponding pressure surfaces (50 ^f ) which cooperate with the raised male surface in order to bend and emboss plastic plates and plates made of soft metal j which are suitable as pressure plates, and that Pair of plates can be closed and subjected to repeated pressure in order to carry out embossing without the cartridge letter body being depressed the. Patent attorneys DjpMfig. Martin Licht, DiP-Wwwiflnf. ÄxJj «drfstrfann, Dipl.-Phys, Sebastian Herrmann 2. Embossing disks according to claim 1, characterized in that that the pressure resisting material comprises epoxy resin. 3. Embossing disks according to claim 1, characterized in that that the disc is made of a material from the group of low and medium carbon steels. 4. embossing disks according to claim 3> characterized in that the pressure-resistant material consists of a metal, the melting point of which is lower than that of steel. 5. Embossing disks according to claim 3> characterized in that the steel is heat-treated up to a Rockwell C hardness of between hk and h7. 6. embossing disks according to claim 1, characterized in that the pressure-resisting material (32) is flat with the surface Surface of the pinger is. 7. A method for producing an embossed disk, characterized through the following process steps: production of a blank from deformable material, Manufacture a number of fingers extending radially from extending a central portion of the blank, making embossed letters on the fingers, each the embossed letters have a raised surface area on one side of the finger and a corresponding depression on the the other side of the finger, and filling the recess with a pressure-resistant material. b. Method according to claim 7, characterized in that the material of the blank is selected from a group of low and medium carbon steels, that is, the druokwiderstehonde Material consists of metal, which has a lower melting point than the blank, and that the pressure-sensitive 00 9828/1211 resisting material melted, introduced into the recess and is cured within the recess. 9. The method according to claim 7, characterized in that the pressure-resistant material consists of an epoxy resin, and that the epoxy resin is cured in the recess. 009828/1211 Blank page