EP1847406B1 - Stamping method - Google Patents

Stamping method Download PDF

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Publication number
EP1847406B1
EP1847406B1 EP07007296A EP07007296A EP1847406B1 EP 1847406 B1 EP1847406 B1 EP 1847406B1 EP 07007296 A EP07007296 A EP 07007296A EP 07007296 A EP07007296 A EP 07007296A EP 1847406 B1 EP1847406 B1 EP 1847406B1
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EP
European Patent Office
Prior art keywords
metallic body
sign
stamping
removal
graphic pattern
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP07007296A
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German (de)
French (fr)
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EP1847406A1 (en
Inventor
Emanno Tanghetti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Effebi SpA
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Effebi SpA
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Publication date
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Publication of EP1847406A1 publication Critical patent/EP1847406A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/24—Pressing or stamping ornamental designs on surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B44C1/221—Removing surface-material, e.g. by engraving, by etching using streams of abrasive particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B44—DECORATIVE ARTS
    • B44C—PRODUCING DECORATIVE EFFECTS; MOSAICS; TARSIA WORK; PAPERHANGING
    • B44C1/00—Processes, not specifically provided for elsewhere, for producing decorative surface effects
    • B44C1/22—Removing surface-material, e.g. by engraving, by etching
    • B44C1/222—Removing surface-material, e.g. by engraving, by etching using machine-driven mechanical means

Definitions

  • the present invention concerns a method for the production of graphic patterns, such as signs (i.e. writings), logos, designs or other, on the outer surface of a metallic body.
  • metallic body will refer specifically to bodies of valves and of related components, such as, for example, couplings or ring nuts, although the method subject of the present invention can be equally applied to any metallic body produced by means of a known technological process, such as, for example, pressing, casting, chip removal machining or other.
  • the present invention applies to metallic bodies obtained by pressing.
  • a graphic pattern is usually stamped (i.e. printed) such as, for example, sign or a logo or a design or other, acting as "signature" identifying the individual product or the company or the person that produced or designed the mechanical part in question.
  • Said operation is normally performed during pressing of the final mechanical component.
  • one of the dies of the tool bears in relief the characters or the logo or other to be stamped on the final mechanical component.
  • the entire metallic body can undergo various surface finishing operations, for example sand-blasting or polishing or other similar operations, and the graphic pattern, engraved on the outer surface of said metallic body, can be seen by anyone.
  • the pattern obtained on the surface of the metallic body via the stamping operation is very often not easily legible due to the inherent difficulty connected with the stamping of complex forms such as alphanumerical characters.
  • US-A-2032039 teaches to enhance the appearance of a graphic pattern stamped on a metallic body by cutting, with a hand graving tool, the "rounded bottom portions of the depressions" of the stamped graphic pattern. US-A-2032039 is silent about cutting the area surrounding said stamped graphic pattern.
  • DE-A-2518751 discloses a method for manufacturing a watch dial in aluminum-base material with symbols in relief. The method provides a first step of anodizing an aluminum-base plate, a second step of embossing the plate in order to get embossed relief elements, a third step of removing the oxidized superficial layer from the upper surface of the embossed relief elements, and a final step of anodizing the projecting surfaces of the relief elements.
  • DE-A-2518751 is silent about removing materials from the surface surrounding the relief elements.
  • the aim of the present invention is to improve the legibility of the graphic patterns, such as sign, logos or similar, present on the outer surface of mechanical components in general, preferably valves or couplings or ring nuts, so as to facilitate the reading thereof and simplify their identification on the surface of the metallic body.
  • a further aim of the present invention is to devise a method that permits the above to be obtained via a simple mechanical operation that can be performed rapidly.
  • surface removal of material indicates a technological process designed to remove a surface layer of the portion of outer surface that contains the above-mentioned graphic pattern, via the use of appropriate machines such as, for example, milling machines or lathes or other machines able to perform similar mechanical operations preferably involving chip removal.
  • the surface portion that contains the sign or logo or other graphic symbol is no longer substantially flush with the remaining outer surface of the metallic body, i.e. with the surface of the metallic body not involved in the material surface removal operation, and consequently the sign is much more opaque - resulting in a much greater visual contrast - than the portion of surface subject to the surface removal operation, facilitating reading of the sign or in any case the location thereof on the outer surface of the metallic body.
  • the surface removal of material creates a first difference in brightness between said outer pressed surface of the metallic body and the portion of machined outer surface containing the graphic pattern, and a second difference in brightness between the portion of machined outer surface containing the graphic pattern and the latter, in general fairly opaque, guaranteeing easier legibility and traceability of said pattern on the metallic body.
  • the method also comprises a surface finishing step, for example by means of sand-blasting, of the entire metallic body, prior or subsequent to the above-mentioned operation of removal of metallic material near the stamped graphic pattern, in order to further increase the visual contrast between stamped pattern and remaining portion of the metallic body.
  • a surface finishing step for example by means of sand-blasting, of the entire metallic body, prior or subsequent to the above-mentioned operation of removal of metallic material near the stamped graphic pattern, in order to further increase the visual contrast between stamped pattern and remaining portion of the metallic body.
  • 1 indicates the generic metallic body which in the preferred embodiment can be a ring nut designed to be fixed to a valve for the passage of fluids.
  • the metallic body, preferably a ring nut, 1 is produced by means of a pressing operation.
  • sign 5 is produced by means of stamping or coining.
  • Said sign 5, again according to the preferred embodiment, can be produced either during pressing of the metallic body 1 or subsequently to it, in a second step, although the first solution is preferable to the second as it permits elimination of an extra operation.
  • outer surface 3 although in the embodiment described here is curvilinear, in a further embodiment of the invention is not necessarily curvilinear and can be, for example, straight or any other shape.
  • Stamping of the sign 5 is followed by surface removal of material near the portion 6 of the outer surface 3 which contains said stamped sign 5 or which in any case is adjacent to said sign 5.
  • the surface removal step can be performed via the use of cutters appropriately shaped to produce particular forms of the portion 6 of outer surface 3 or, in the case of machining of the entire outer surface 3 (not shown here), can advantageously be performed also via the use of a lathe, for example, and in any case always via the use of a machine tool for chip removal. Said removal of a surface layer of material varies according to the shape of the outer surface 3 on which the sign 5 is produced and the aesthetic effect required.
  • the final effect of said process is to give the machined surface portion 6 a bright finish with respect to the non-machined outer surface 3, making the sign 5 on the metallic body 2 immediately identifiable and, as a result of the marked contrast in brightness created, after machining of the surface portion 6, between the portion 6 and said sign 5, to facilitate reading of the sign 5 since it is more opaque than the portion 6.
  • the entire outer surface 3 can undergo a surface finishing operation such as, for example, sand-blasting or shot-blasting or in any case any other surface operation suitable for giving the outer surface a certain uniformity and, at the same time, increasing the opacity thereof.
  • Said sand-blasting step can be performed via the use of abrasive grains which subject the surface 3 to a high pressure and abrasion action suitable for deforming the surface 3 and making it even more opaque.
  • the end result of the material surface removal operations, combined if necessary with the previous sand-blasting operation of the outer surface 3, is that of obtaining a sign 5 or a portion 6 of outer surface 3 containing the sign 5 no longer flush with the outer surface 3 of the metallic body 1, and a difference in brightness between the outer surface 3, the portion 6 and the sign 5.
  • the metallic body 1 thus machined can undergo galvanic treatment for coating the outer surface 6, such as, for example, nickel plating or chromium plating so as to further highlight the differences in brightness between the sign 5 and the surface portion 6 containing it or the outer surface 3.
  • galvanic treatment for coating the outer surface 6, such as, for example, nickel plating or chromium plating so as to further highlight the differences in brightness between the sign 5 and the surface portion 6 containing it or the outer surface 3.
  • outer surface 3 of the metallic body 1 also comprises the surface of the body on the side of the metallic body 1 that is not directly visible such as, for example, the inner side of the bodywork of a car or a protective metal shell of a device or other not cited here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Adornments (AREA)
  • Laminated Bodies (AREA)
  • Chemically Coating (AREA)
  • Confectionery (AREA)
  • Forging (AREA)

Abstract

Method for stamping graphic patterns on a metallic body, comprising a step of stamping of at least one graphic pattern on at least one portion of the outer surface of the above-mentioned metallic body and at least one step of surface removal of material near or adjacent to said at least one graphic pattern stamped on said at least one portion of the outer surface of said metallic body.

Description

  • The present invention concerns a method for the production of graphic patterns, such as signs (i.e. writings), logos, designs or other, on the outer surface of a metallic body.
  • Preferably, hereinafter, the term "metallic body" will refer specifically to bodies of valves and of related components, such as, for example, couplings or ring nuts, although the method subject of the present invention can be equally applied to any metallic body produced by means of a known technological process, such as, for example, pressing, casting, chip removal machining or other. The present invention applies to metallic bodies obtained by pressing.
  • It is known that on the outer surface of valves, or ring nuts, or couplings, or similar components, a graphic pattern is usually stamped (i.e. printed) such as, for example, sign or a logo or a design or other, acting as "signature" identifying the individual product or the company or the person that produced or designed the mechanical part in question.
  • Said operation is normally performed during pressing of the final mechanical component. In practice, one of the dies of the tool bears in relief the characters or the logo or other to be stamped on the final mechanical component. At the end of the pressing operation, the entire metallic body can undergo various surface finishing operations, for example sand-blasting or polishing or other similar operations, and the graphic pattern, engraved on the outer surface of said metallic body, can be seen by anyone.
  • Nevertheless, the pattern obtained on the surface of the metallic body via the stamping operation is very often not easily legible due to the inherent difficulty connected with the stamping of complex forms such as alphanumerical characters.
  • In addition, with the passing of time the sign or logo or anything else stamped on the outer surface of the body inevitably undergoes a process of deterioration which can be partial or even total.
  • Furthermore, even when the sign is legible, very often it is not easy to determine its exact position on the surface of the metallic body: in fact the sign is difficult to distinguish from the surrounding outer surface portion.
  • This also applies to sign or logos or other produced by means of spark erosion. Said operation, in addition to being particularly laborious and costly, inevitably involves an increase in the manufacturing times of the finished mechanical part.
  • US-A-2032039 teaches to enhance the appearance of a graphic pattern stamped on a metallic body by cutting, with a hand graving tool, the "rounded bottom portions of the depressions" of the stamped graphic pattern. US-A-2032039 is silent about cutting the area surrounding said stamped graphic pattern.
  • DE-A-2518751 discloses a method for manufacturing a watch dial in aluminum-base material with symbols in relief. The method provides a first step of anodizing an aluminum-base plate, a second step of embossing the plate in order to get embossed relief elements, a third step of removing the oxidized superficial layer from the upper surface of the embossed relief elements, and a final step of anodizing the projecting surfaces of the relief elements. DE-A-2518751 is silent about removing materials from the surface surrounding the relief elements.
  • The aim of the present invention is to improve the legibility of the graphic patterns, such as sign, logos or similar, present on the outer surface of mechanical components in general, preferably valves or couplings or ring nuts, so as to facilitate the reading thereof and simplify their identification on the surface of the metallic body.
  • A further aim of the present invention is to devise a method that permits the above to be obtained via a simple mechanical operation that can be performed rapidly.
  • These and other aims are achieved by the method for stamping of graphic patterns on a metallic body according to the first independent claim and the subsequent dependent claims, characterised in that it comprises a stamping step of at least one graphic pattern on at least one portion of the outer surface of said pressed metallic body and at least one step of surface removal of the metallic material near or adjacent to said at least one graphic pattern stamped on said at least one portion of the outer surface of said metallic body.
  • It should be observed that, hereinafter, surface removal of material indicates a technological process designed to remove a surface layer of the portion of outer surface that contains the above-mentioned graphic pattern, via the use of appropriate machines such as, for example, milling machines or lathes or other machines able to perform similar mechanical operations preferably involving chip removal.
  • In this way, at the end of the material removal operation, the surface portion that contains the sign or logo or other graphic symbol is no longer substantially flush with the remaining outer surface of the metallic body, i.e. with the surface of the metallic body not involved in the material surface removal operation, and consequently the sign is much more opaque - resulting in a much greater visual contrast - than the portion of surface subject to the surface removal operation, facilitating reading of the sign or in any case the location thereof on the outer surface of the metallic body.
  • In practice, the surface removal of material creates a first difference in brightness between said outer pressed surface of the metallic body and the portion of machined outer surface containing the graphic pattern, and a second difference in brightness between the portion of machined outer surface containing the graphic pattern and the latter, in general fairly opaque, guaranteeing easier legibility and traceability of said pattern on the metallic body.
  • According to a particular embodiment of the present invention, furthermore, the method also comprises a surface finishing step, for example by means of sand-blasting, of the entire metallic body, prior or subsequent to the above-mentioned operation of removal of metallic material near the stamped graphic pattern, in order to further increase the visual contrast between stamped pattern and remaining portion of the metallic body.
  • Some particular embodiments of the present invention will now be described by way of non-limiting example with reference to the attached figures, in which:
    • figure 1 is an axonometric view of the pressed metallic body, particularly of a ring nut for valves, with sign on the outer surface thereof;
    • figure 2 is an axonometric view of the pressed metallic body and the sign at the end of polishing of the same;
    • figure 3 is an enlarged axonometric view of the stamped and polished sign of figure 1.
  • With particular reference to said figures, 1 indicates the generic metallic body which in the preferred embodiment can be a ring nut designed to be fixed to a valve for the passage of fluids.
  • The metallic body, preferably a ring nut, 1 is produced by means of a pressing operation.
  • According to the preferred embodiment of the invention, on the outer surface 3 of said ring nut 1 sign 5 is produced by means of stamping or coining. Said sign 5, again according to the preferred embodiment, can be produced either during pressing of the metallic body 1 or subsequently to it, in a second step, although the first solution is preferable to the second as it permits elimination of an extra operation.
  • It should furthermore be observed that the outer surface 3, although in the embodiment described here is curvilinear, in a further embodiment of the invention is not necessarily curvilinear and can be, for example, straight or any other shape.
  • Stamping of the sign 5 is followed by surface removal of material near the portion 6 of the outer surface 3 which contains said stamped sign 5 or which in any case is adjacent to said sign 5.
  • The surface removal step can be performed via the use of cutters appropriately shaped to produce particular forms of the portion 6 of outer surface 3 or, in the case of machining of the entire outer surface 3 (not shown here), can advantageously be performed also via the use of a lathe, for example, and in any case always via the use of a machine tool for chip removal. Said removal of a surface layer of material varies according to the shape of the outer surface 3 on which the sign 5 is produced and the aesthetic effect required.
  • The final effect of said process is to give the machined surface portion 6 a bright finish with respect to the non-machined outer surface 3, making the sign 5 on the metallic body 2 immediately identifiable and, as a result of the marked contrast in brightness created, after machining of the surface portion 6, between the portion 6 and said sign 5, to facilitate reading of the sign 5 since it is more opaque than the portion 6.
  • Preferably prior to the removal of material near the sign 5, the entire outer surface 3 can undergo a surface finishing operation such as, for example, sand-blasting or shot-blasting or in any case any other surface operation suitable for giving the outer surface a certain uniformity and, at the same time, increasing the opacity thereof. Said sand-blasting step can be performed via the use of abrasive grains which subject the surface 3 to a high pressure and abrasion action suitable for deforming the surface 3 and making it even more opaque. The end result of the material surface removal operations, combined if necessary with the previous sand-blasting operation of the outer surface 3, is that of obtaining a sign 5 or a portion 6 of outer surface 3 containing the sign 5 no longer flush with the outer surface 3 of the metallic body 1, and a difference in brightness between the outer surface 3, the portion 6 and the sign 5.
  • In this way the user can immediately trace the sign 5 on the outer surface 3 of said body 1 and read it easily.
  • Furthermore the metallic body 1 thus machined can undergo galvanic treatment for coating the outer surface 6, such as, for example, nickel plating or chromium plating so as to further highlight the differences in brightness between the sign 5 and the surface portion 6 containing it or the outer surface 3.
  • Finally it should be pointed out that the definition: "outer surface 3 of the metallic body 1" also comprises the surface of the body on the side of the metallic body 1 that is not directly visible such as, for example, the inner side of the bodywork of a car or a protective metal shell of a device or other not cited here.
  • It should also be pointed out that the surface removal operation can also involve the entire outer surface 3 of the metallic body 1, without departing from the scope of protection of the present invention.

Claims (6)

  1. Method for stamping graphic patterns on a pressed metallic body (1) of the type comprising a step of stamping at least one graphic pattern (5) on at least one portion of the outer surface (3) of said metallic body, characterised by comprising at least one step of material removal of a surface layer (6) of the portion of said outer surface that contains said at least one graphic pattern (5) stamped on said at least one portion of the outer surface of said metallic body (1).
  2. Method as claimed in claim 1, characterised in that said step of material removal of a surface layer (6) is achieved by means of a chip removal operation.
  3. Method as claimed in claims 1 to 2, characterised in that said step of material removal of a surface layer (6) is preceded by a surface finishing operation of the metallic body (1).
  4. Method as claimed in claim 3, characterised in that said surface finishing operation of the metallic body is a sand-blasting operation.
  5. Method as claimed in claims 1 to 4, characterised in that said step of material removal of a surface layer (6) is followed by a galvanic treatment operation, for surface coating of the metallic body (1).
  6. Method as claimed in any one of the preceding claims, characterised in that the stamping step of said at least one graphic pattern (5) is performed simultaneously with the pressing step of said metallic body (1).
EP07007296A 2006-04-21 2007-04-10 Stamping method Active EP1847406B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000814A ITMI20060814A1 (en) 2006-04-21 2006-04-21 METHOD FOR MOLDING OF WRITINGS OR LOGO OR SIMILAR ON THE EXTERNAL SURFACE OF METAL BODIES

Publications (2)

Publication Number Publication Date
EP1847406A1 EP1847406A1 (en) 2007-10-24
EP1847406B1 true EP1847406B1 (en) 2010-01-27

Family

ID=38093486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07007296A Active EP1847406B1 (en) 2006-04-21 2007-04-10 Stamping method

Country Status (6)

Country Link
EP (1) EP1847406B1 (en)
AT (1) ATE456467T1 (en)
DE (1) DE602007004526D1 (en)
DK (1) DK1847406T3 (en)
ES (1) ES2339708T3 (en)
IT (1) ITMI20060814A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1398640B1 (en) * 2010-03-03 2013-03-08 Metalbottoni S P A PROCEDURE FOR THE EXECUTION OF DESIGNS AND / OR WRITTEN ON NATURAL MATERIALS OR SYNTHETIC IN SHEET, PARTICULARLY FABRICS, LEATHER, ECO-LEATHER, CLOTHS, SYNTHETIC MATERIALS LAMINATED AND / OR PAIRED OR SIMILAR.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB189323555A (en) * 1893-12-07 1894-01-13 Edwin Taylor Improvements in and relating to the Ornamentation of Ash Pans, Fenders, Fire-dogs, Shovels, and the like.
GB191309660A (en) * 1913-04-24 1914-04-09 Emil Ott A New Process for Imprinting Lettering, Designs, and the like, upon Metal.
US2032039A (en) 1934-08-22 1936-02-25 Blackinton & Co R Art of producing engraved patterns for silverware and the like
DE2518751A1 (en) 1975-04-26 1976-11-04 Denis Montavon Watch dial having signs in relief - formed by anodising aluminium, stamping and exposing top surface

Also Published As

Publication number Publication date
ITMI20060814A1 (en) 2007-10-22
DK1847406T3 (en) 2010-04-12
ATE456467T1 (en) 2010-02-15
ES2339708T3 (en) 2010-05-24
EP1847406A1 (en) 2007-10-24
DE602007004526D1 (en) 2010-03-18

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