WO1992011102A1 - Marking of casting - Google Patents

Marking of casting Download PDF

Info

Publication number
WO1992011102A1
WO1992011102A1 PCT/FI1991/000401 FI9100401W WO9211102A1 WO 1992011102 A1 WO1992011102 A1 WO 1992011102A1 FI 9100401 W FI9100401 W FI 9100401W WO 9211102 A1 WO9211102 A1 WO 9211102A1
Authority
WO
WIPO (PCT)
Prior art keywords
marking
piece
casting
mold
hole
Prior art date
Application number
PCT/FI1991/000401
Other languages
French (fr)
Inventor
Lauri Arvid Muikku
Eero Olavi Toivonen
Original Assignee
Leinovalu Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Leinovalu Oy filed Critical Leinovalu Oy
Publication of WO1992011102A1 publication Critical patent/WO1992011102A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22C—FOUNDRY MOULDING
    • B22C23/00—Tools; Devices not mentioned before for moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D45/00—Equipment for casting, not otherwise provided for

Definitions

  • the invention belongs to the field of founding, and relates to a method and apparatus for providing castings with markings in the casting stage. 5
  • the molding stage it is easy to provide a casting mold with desired markings, for instance by attaching a desired mark on the surface of the model, which then is copied to the wall of the mold, and further to the casting.
  • the marking of the casting, after casting and knocking out the flask also
  • figure l illustrates a closed mold seen from
  • FIG. 1 illustrates a preferred embodiment of the fastening piece of the marking piece to be attached to * 35 the mold according to the present invention, seen from the side and from the top
  • figures 4 and 5 illustrate a respective marking piece seen from the side and the top
  • figure 6 illustrates another fastening piece attached to a mold and a marking piece seen from the side.
  • Figure l illustrates a mold 1, formed of a top part and a bottom part, and closed for casting.
  • a gate 2 for the molten metal leads to inside the mold.
  • In the top part of the mold there is in the molding stage provided a hole 3, at the bottom end of which hole there is attached the locking collar 4 of the marking pin, to which collar the marking piece 5 is attached prior to the casting.
  • the locking collar (figures 2 and 3) is provided with a conical hole 6 extending therethrough, and the marking piece (figures 4 and 5) is attached tightly in this hole.
  • the collar is provided with suitable locking means such as the shoulders 7 and 8. Their purpose is particularly to prevent the collar from rising up in the hole due to the pressure of the molten metal.
  • a code symbol 9 formed of a print pattern, which code symbol contains the desired information of the casting such as the charge number, the number of the ladle, the order number of the casting or the symbol of the founder.
  • the code is copied from the marking piece onto the surface of the casting.
  • the code symbol is provided in the marking piece as an embossing, because it is more difficult to remove a gravure thus created from the surface of the casting.
  • the code symbol 9 may also be formed by any other elements that can be transferred to the surface of the casting. Such elements could be e.g. pins of metal, different from that of the casting.
  • the code can also be machine readable.
  • the marking piece is attached in the locking collar by means of locking members.
  • the locking members include segment-shaped grooves 10 provided inside the hole 6, on the opposite sides thereof, and the ends of the said grooves are provided with channels 11 leading to the surface of the collar.
  • the marking piece is provided with brackets 12 matching the channels 11 and the grooves 10. The marking piece is fitted in the collar so that its brackets fall in the channels of the collar, whereafter the piece is turned, so that the brackets are set in the grooves of the collar, and the marking piece is tightly locked in the hole 6.
  • the locking means can also be formed of threadings, for example. Other methods of locking can be employed, too.
  • a cylindrical gripping member 13 In the top part of the marking piece, there also is in this embodiment a cylindrical gripping member 13, whereby the marking piece can be turned in the hole and lifted out thereof.
  • the edge of the gripping member is provided with a segment-shaped groove 14, and a channel 15 leading to the said groove from the top.
  • a key fitting in the gripping member is formed by a pipe, the inside of the bottom end whereof is provided with a pin fitting in the channel and the groove.
  • the marking piece can be turned in the locking collar in various different positions, and the code is formed of the different positions of the code members with respect to the collar. In that case it is not necessary that the marking piece is removable from the collar.
  • the hole can also be replaced by a pin designed for turning the marking piece.
  • Figure 6 illustrates this modification. It shows the locking collar 17. Inside it, there is a cylindrical extension 18, where a rotating marking piece 19 is inserted. On the top surface of the marking piece, there is attached the pin 20, the other end whereof extends to outside the mold through the hole 21.
  • the locking collar and the marking piece are naturally made of some material that endures the temperature of molten metal, most advantageously of some suitable ceramic or fireproof material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Molds, Cores, And Manufacturing Methods Thereof (AREA)

Abstract

The invention relates to the marking of castings. A mold is provided with a hole (3), and prior to casting in the hole is inserted a marking piece (5), which impresses the marking on the surface of the casting.

Description

MARKING OF CASTING
The invention belongs to the field of founding, and relates to a method and apparatus for providing castings with markings in the casting stage. 5 In the molding stage it is easy to provide a casting mold with desired markings, for instance by attaching a desired mark on the surface of the model, which then is copied to the wall of the mold, and further to the casting. The marking of the casting, after casting and knocking out the flask, also
10 is easy for instance by means of stamping.
Neither of the above mentioned marking methods is very practicable in cases where information concerning the casting stage must be provided in the castings. Such information is for instance the charge number, which is normally not yet
15 known in the molding stage, apart from very exceptional cases. According to the present practice, this information is, when necessary, marked in the casting only after knocking out the flask. Therefore there always is the risk of mixing up the markings, particularly when similar castings are
20 produced in series. In some cases it is even necessary for an inspector from outside, for instance the receiver of the casting or a representative of an inspecting establishment, to make sure in the foundry that the information provided in the casting is correct. Consequently a reliable acceptance
25 inspection takes a considerable amount of time according to the present marking methods.
We have now invented the method and apparatus defined in the appended patent claims, whereby the above described draw¬ backs can be avoided.
30 A few preferred embodiments of the invention are explained in more detail below. In the schematical drawings provided in the description, figure l illustrates a closed mold seen from
. the side, figures 2 and 3 illustrate a preferred embodiment of the fastening piece of the marking piece to be attached to * 35 the mold according to the present invention, seen from the side and from the top, figures 4 and 5 illustrate a respective marking piece seen from the side and the top, and figure 6 illustrates another fastening piece attached to a mold and a marking piece seen from the side. Figure l illustrates a mold 1, formed of a top part and a bottom part, and closed for casting. A gate 2 for the molten metal leads to inside the mold. In the top part of the mold, there is in the molding stage provided a hole 3, at the bottom end of which hole there is attached the locking collar 4 of the marking pin, to which collar the marking piece 5 is attached prior to the casting.
The locking collar (figures 2 and 3) is provided with a conical hole 6 extending therethrough, and the marking piece (figures 4 and 5) is attached tightly in this hole. In order to make the collar remain firmly in place in the molding mass, the collar is provided with suitable locking means such as the shoulders 7 and 8. Their purpose is particularly to prevent the collar from rising up in the hole due to the pressure of the molten metal.
On the bottom surface of the marking piece, there is provided a code symbol 9 formed of a print pattern, which code symbol contains the desired information of the casting such as the charge number, the number of the ladle, the order number of the casting or the symbol of the founder. In the course of casting, the code is copied from the marking piece onto the surface of the casting. Most advantageously the code symbol is provided in the marking piece as an embossing, because it is more difficult to remove a gravure thus created from the surface of the casting.
The code symbol 9 may also be formed by any other elements that can be transferred to the surface of the casting. Such elements could be e.g. pins of metal, different from that of the casting. The code can also be machine readable. The marking piece is attached in the locking collar by means of locking members. In the top part of the collar, the locking members include segment-shaped grooves 10 provided inside the hole 6, on the opposite sides thereof, and the ends of the said grooves are provided with channels 11 leading to the surface of the collar. Respectively, the marking piece is provided with brackets 12 matching the channels 11 and the grooves 10. The marking piece is fitted in the collar so that its brackets fall in the channels of the collar, whereafter the piece is turned, so that the brackets are set in the grooves of the collar, and the marking piece is tightly locked in the hole 6.
The locking means can also be formed of threadings, for example. Other methods of locking can be employed, too. In the top part of the marking piece, there also is in this embodiment a cylindrical gripping member 13, whereby the marking piece can be turned in the hole and lifted out thereof. The edge of the gripping member is provided with a segment-shaped groove 14, and a channel 15 leading to the said groove from the top. A key fitting in the gripping member is formed by a pipe, the inside of the bottom end whereof is provided with a pin fitting in the channel and the groove.
According to a preferred embodiment of the invention, the marking piece can be turned in the locking collar in various different positions, and the code is formed of the different positions of the code members with respect to the collar. In that case it is not necessary that the marking piece is removable from the collar. The hole can also be replaced by a pin designed for turning the marking piece. Figure 6 illustrates this modification. It shows the locking collar 17. Inside it, there is a cylindrical extension 18, where a rotating marking piece 19 is inserted. On the top surface of the marking piece, there is attached the pin 20, the other end whereof extends to outside the mold through the hole 21.
The locking collar and the marking piece are naturally made of some material that endures the temperature of molten metal, most advantageously of some suitable ceramic or fireproof material.

Claims

PATENT CLAIMS
1. A method for marking a casting to be cast in a mold, characterized in that prior to the casting, the mold is provided with a hole leading to inside the mold, and in the said hole there is fastened a marking piece provided with an information transfer element forming a marking, so that the element gets in touch with the molten metal entering the mold and transfers the marking therein.
2. The method of claim 1, characterized in that the information transfer element is a pring pattern which impresses the marking in the molten metal.
3. The method of claim 1 or 2, characterized in that the marking piece can, in order to change the marking, be replaced after fastening, or that its position can be changed.
4. The method of any of claims 1 - 3, characterized in that prior to fastening the marking piece, in the hole there is provided a fastening piece, where the marking piece is attached.
5. The method of claim 4, characterized in that the marking piece is attached in the molding stage.
6. An apparatus for marking a casting to be cast in a mold, characterized in that it comprises a marking piece (5/19) provided with an information transfer element, and which marking piece is attached to the mold, prior to casting, in a hole (3/21) provided for it, in such a fashion that the element transfers a marking on the surface of the casting to be formed.
7. The apparatus of claim 6, characterized in that the information transfer element is a print pattern which impresses the marking in the molten metal.
8. The apparatus of claim 6 or 7, characterized in that after attaching the marking piece, it (5) can be replaced or its (19) position can be changed.
9. The apparatus of any of claims 6 - 8, characterized in that it also comprises a fastening piece (4/17) to be removably mounted in the hole provided in the mold, in which fastening piece the marking piece is attached.
10. The apparatus of claim 9, characterized in that both the fastening piece and the marking piece are provided with locking members (10, 12/18) for ensuring the fastening.
11. The apparatus of any of claims 6 - 10, characterized in that the marking piece is provided with a member (13/20) for gripping.
12. The apparatus of any of claims 9 - 11, characterized in that the fastening piece, too, is provided with an information transfer element which transfers a marking on the surface of the casting.
SUBSTITUTESHEET
PCT/FI1991/000401 1990-12-19 1991-12-19 Marking of casting WO1992011102A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI906287A FI906287A (en) 1990-12-19 1990-12-19 MAERKNING AV ETT GJUTSTYCKE.
FI906287 1990-12-19

Publications (1)

Publication Number Publication Date
WO1992011102A1 true WO1992011102A1 (en) 1992-07-09

Family

ID=8531616

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1991/000401 WO1992011102A1 (en) 1990-12-19 1991-12-19 Marking of casting

Country Status (2)

Country Link
FI (1) FI906287A (en)
WO (1) WO1992011102A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2311948A (en) * 1996-04-08 1997-10-15 Ford Motor Co A system for identifying and tracking castings
ES2114415A1 (en) * 1994-02-02 1998-05-16 E O C Normalien Gmbh & Co Kg Marking insert for an injection mould
US6582197B2 (en) 2001-02-22 2003-06-24 Simon E. Coulson Method of investment casting with casting identification
WO2008000660A1 (en) * 2006-06-27 2008-01-03 Siemens Aktiengesellschaft Method for producing a cast piece
US8883054B2 (en) 2009-06-18 2014-11-11 Progressive Components International Corporation Mold monitoring
US8899955B2 (en) 2009-06-18 2014-12-02 Progressive Components International Corporation Electronic cycle counter
US10715464B2 (en) 2009-06-18 2020-07-14 Progressive Components International Corporation System and method for monitoring tooling activities

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1559779A (en) * 1923-10-23 1925-11-03 Rice John Device for casting indicia on pipes
US3734448A (en) * 1971-04-29 1973-05-22 Freeman Supply Co Quick change indicia for patterns and the like
US4384702A (en) * 1982-03-09 1983-05-24 Boris Boskovic Mold insert
FR2620370A1 (en) * 1987-09-11 1989-03-17 Renault Device for automatic marking of moulded articles
FR2644610A1 (en) * 1989-03-14 1990-09-21 Renault Automatic device for numbering parts obtained by moulding

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1559779A (en) * 1923-10-23 1925-11-03 Rice John Device for casting indicia on pipes
US3734448A (en) * 1971-04-29 1973-05-22 Freeman Supply Co Quick change indicia for patterns and the like
US4384702A (en) * 1982-03-09 1983-05-24 Boris Boskovic Mold insert
FR2620370A1 (en) * 1987-09-11 1989-03-17 Renault Device for automatic marking of moulded articles
FR2644610A1 (en) * 1989-03-14 1990-09-21 Renault Automatic device for numbering parts obtained by moulding

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2114415A1 (en) * 1994-02-02 1998-05-16 E O C Normalien Gmbh & Co Kg Marking insert for an injection mould
GB2311948A (en) * 1996-04-08 1997-10-15 Ford Motor Co A system for identifying and tracking castings
US5894005A (en) * 1996-04-08 1999-04-13 Ford Global Technologies, Inc. System for identifying castings and for tracking casting process parameters
GB2311948B (en) * 1996-04-08 2000-03-29 Ford Motor Co System for identifying castings and for tracking casting process parameters
DE19713861C2 (en) * 1996-04-08 2000-04-06 Ford Global Tech Inc Method and device for identifying molded parts and for tracking molding process parameters
US6582197B2 (en) 2001-02-22 2003-06-24 Simon E. Coulson Method of investment casting with casting identification
WO2008000660A1 (en) * 2006-06-27 2008-01-03 Siemens Aktiengesellschaft Method for producing a cast piece
US8846216B2 (en) 2006-06-27 2014-09-30 Siemens Aktiengesellschaft Cast piece and method for producing same
US8883054B2 (en) 2009-06-18 2014-11-11 Progressive Components International Corporation Mold monitoring
US8899955B2 (en) 2009-06-18 2014-12-02 Progressive Components International Corporation Electronic cycle counter
US9555570B2 (en) 2009-06-18 2017-01-31 Progressive Components International Corporation Electronic cycle counter
US10715464B2 (en) 2009-06-18 2020-07-14 Progressive Components International Corporation System and method for monitoring tooling activities

Also Published As

Publication number Publication date
FI906287A0 (en) 1990-12-19
FI906287A (en) 1992-06-20

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