EP0045115B1 - Wall-ironing device - Google Patents
Wall-ironing device Download PDFInfo
- Publication number
- EP0045115B1 EP0045115B1 EP81200864A EP81200864A EP0045115B1 EP 0045115 B1 EP0045115 B1 EP 0045115B1 EP 81200864 A EP81200864 A EP 81200864A EP 81200864 A EP81200864 A EP 81200864A EP 0045115 B1 EP0045115 B1 EP 0045115B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- ironing
- recess
- mandril
- thickness
- 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.)
- Expired
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/28—Deep-drawing of cylindrical articles using consecutive dies
Definitions
- the invention relates to a device for wall-ironing sleeves, e.g. can bodies, containers etcetera, having a wall portion near the open end with a thickness enlarged with respect to the wall thickness of the sleeve body, said device comprising at least two wall-ironing rings and a wall-ironing mandril movable through said rings and having a relatively broad cylindrical front part and a relatively narrow, cylindrical rear part.
- a device for wall-ironing sleeves e.g. can bodies, containers etcetera
- said device comprising at least two wall-ironing rings and a wall-ironing mandril movable through said rings and having a relatively broad cylindrical front part and a relatively narrow, cylindrical rear part.
- Such a device is known e.g. from US-A-3945231.
- a larger wall thickness of the aforesaid wall portion is necessary to be able to successfully carry out the following process steps, for example necking, flanging and folding.
- the wall-forming mandril according to the prior art exhibits said relatively broad, cylindrical front part and the relatively narrow, cylindrical rear part.
- the invention has for its object to provide a device by which the said wall thickness difference can be enlarged without the need for increasing the relative wall thickness reduction in the third ring, whilst it is avoided that the maximum permissible, relative wall thickness reduction is too closely approached or even exceeded.
- the invention provides a device of the kind set forth in the preamble in which the front part of the wall-ironing mandril, at the end facing the rear part, exhibits an annular recess of a predetermined depth, the position of said recess being such that after having passed through the wall-ironing ring last but one the sleeve wall has at least partly reached the recess, and that the material being located at the area of the recess after having passed through the wall-ironing ring last but one is located at least partly at the rear part after having passed through the last wall-ironing ring.
- the depth of the recess is preferably determined in connection with the desired enlargement of the difference in thickness between said wall portion of enlarged wall thickness and the sleeve body.
- the invention furthermore provides a wall-ironing mandril having a relatively broad, cylindrical front part and a relatively narrow, cylindrical rear part for use in a device of the kind set forth, said wall-ironing mandril embodying the invention being characterized in that at its end facing the rear part the front part has an annular recess of predetermined depth.
- Known means for advancing the wall-ironing mandril 1 in an axial direction relative to the unit 2, 3, 4, 5 indicated by an arrow are not shown.
- a wall-ironed sleeve 6 is in the situation in which it is wall-ironed by the cooperation of the wall-ironing mandril 1 with the first wall-ironing ring 2.
- Fig. 2 illustrates the next-following stage in which the sleeve 6 then wall-ironed is further wall-ironed by means of the second wall-ironing ring 3.
- Fig. 3 illustrates the state in which during the third processing stage the wall-ironing sleeve is again subjected to a wall-ironing process by means of the third wall-ironing ring 4.
- the wall-ironing mandril 1 exhibits a reduction in diameter from the first part to the rear. This step is designated in Figs. 2, 3, 4, 5, 6, 7, 8 and 9 by reference numeral 7.
- Fig. 4 shows the end stage of the process. It is apparent from the drawing that by the cooperation of the wall-ironing mandril 1 with the third wall-ironing ring 4 the sleeve 6 is subjected to a last reduction in thickness. Owing to the presence of the step 7 the reduction is limited in the last case so that a thickened wall part is formed at the open end of the sleeve.
- reference symbols a and b designate the wall thickness of the sleeve body and the thickened wall part at the open end of the sleeve 6, respectively.
- the dimension a is 0.10mm and b 0.16mm in accordance with the foregoing.
- FIGs. 6 to 9 schematically illustrate an embodiment of a device in accordance with the invention.
- the processing stage of Fig. 6 corresponds with that of Fig. 3.
- the processing stage of Fig. 8 corresponds with that of Fig. 4.
- the wall-ironing mandril 8 embodying the invention shown in Figs. 6 to 9 has an annular recess 9. Referring to the description of the prior art and to Figs. 1 to 5 it will be obvious without further explanation how a wall-ironed sleeve 10 is deformed in the cold state by means of the device embodying the invention.
- the proportioning of the device is chosen so that after having passed through the second wall-ironing ring 3 the sleeve wall has at least partly reached the recess 9 and that, moreover, the material located at the area of the recess 9 after the passage through the ring 3 is located at least partly in the area of the hindmost part of the wall-ironing mandril 8 after having passed through the ring 4, that is to say, the material forming the part of the relatively small diameter.
- Figs. 7 and 9 show more in detail the deformation stages of the relevant part of the sleeve wall. In Figs. 7 and 9 some thicknesses are indicated by arrows. Reference line c corresponds to a thickness of 0.16 mm, d to 0.18 mm, e to 0.10mm,fto 0.12 mm and g to 0.18 mm.
- Fig. 11 is a detailed view of a wall-ironing mandril 10 having a recess 11 in the form of an uninterrupted groove.
- the structure of this mandril 10 corresponds with that of the mandril 8 of Figs. 6 to 9.
- Fig. 11 shows a variant in which a wall-ironing mandril 12 has a recess 13 in the form of an additional step.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Vending Machines For Individual Products (AREA)
- Baking, Grill, Roasting (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Metal Extraction Processes (AREA)
Abstract
Description
- The invention relates to a device for wall-ironing sleeves, e.g. can bodies, containers etcetera, having a wall portion near the open end with a thickness enlarged with respect to the wall thickness of the sleeve body, said device comprising at least two wall-ironing rings and a wall-ironing mandril movable through said rings and having a relatively broad cylindrical front part and a relatively narrow, cylindrical rear part.
- Such a device is known e.g. from US-A-3945231.
- A larger wall thickness of the aforesaid wall portion is necessary to be able to successfully carry out the following process steps, for example necking, flanging and folding. For this purpose the wall-forming mandril according to the prior art exhibits said relatively broad, cylindrical front part and the relatively narrow, cylindrical rear part.
- It is common practice to use three wall-ironing rings. With the conventional wall thicknesses and reduction ratios the sleeve wall will pass through the diameter transition between the front and rear parts of the wall-ironing mandril not earlier than in the third ring. This means that in the known technique the thickness of said wall portion can never exceed the wall thickness after the second ring.
- It may occur that a greater difference of wall thickness between said wall portion of enlarged wall thickness and the sleeve body is desirable. In this respect a greater thickness of the wall portion with a sleeve body thickness remaining the same as well as a constant thickness of the wall portion and a smaller thickness of the sleeve body may be concerned. In both cases the wall thickness reduction in the third ring has to be considerably greater than the conventional reduction.
- The invention has for its object to provide a device by which the said wall thickness difference can be enlarged without the need for increasing the relative wall thickness reduction in the third ring, whilst it is avoided that the maximum permissible, relative wall thickness reduction is too closely approached or even exceeded.
- For this purpose the invention provides a device of the kind set forth in the preamble in which the front part of the wall-ironing mandril, at the end facing the rear part, exhibits an annular recess of a predetermined depth, the position of said recess being such that after having passed through the wall-ironing ring last but one the sleeve wall has at least partly reached the recess, and that the material being located at the area of the recess after having passed through the wall-ironing ring last but one is located at least partly at the rear part after having passed through the last wall-ironing ring.
- The depth of the recess is preferably determined in connection with the desired enlargement of the difference in thickness between said wall portion of enlarged wall thickness and the sleeve body.
- The invention furthermore provides a wall-ironing mandril having a relatively broad, cylindrical front part and a relatively narrow, cylindrical rear part for use in a device of the kind set forth, said wall-ironing mandril embodying the invention being characterized in that at its end facing the rear part the front part has an annular recess of predetermined depth.
- The invention will now be described more fully with reference to the accompanying drawing.
- It shows in
- Fig. 1 a cross-sectional view of a known wall-ironing device in the first stage of the wall-ironing process,
- Fig. 2 a view like Fig. 1 in a second stage,
- Fig. 3 a view like Figs. 1 and 2 in a third stage,
- Fig. 4 a view like Figs. 1, 2 and 3 in the end stage of the known wall-ironing process,
- Fig. 5 a detail indicated in Fig. 4 by V,
- Fig. 6 a sectional view of a device embodying the invention in the same process stage as in Fig. 3,
- Fig. 7 a detail indicated in Fig. 6 by VII,
- Fig. 8 a view like Fig. 6 of the device embodying the invention in the same process stage as in Fig. 4,
- Fig. 9 a detail indicated in Fig. 8 by IX,
- Fig. 10 a sectional view of a wall-ironing mandril having a recess in the form of a groove in detail and
- Fig. 11 a detailed sectional view of a wall-ironing mandril having a recess in the form of a step.
- The wall-ironing device according to the prior art schematically shown in Fig. 1 comprises a wall-ironing mandril 1, a first wall-ironing ring 2, a second wall-ironing
ring 3, a third wall-ironingring 4, said wall-ironing rings being relatively coupled by means of aframe 5. Known means for advancing the wall-ironing mandril 1 in an axial direction relative to theunit - In the process phase illustrated in Fig. 1 a wall-ironed
sleeve 6 is in the situation in which it is wall-ironed by the cooperation of the wall-ironing mandril 1 with the first wall-ironing ring 2. - Fig. 2 illustrates the next-following stage in which the
sleeve 6 then wall-ironed is further wall-ironed by means of the second wall-ironingring 3. - Fig. 3 illustrates the state in which during the third processing stage the wall-ironing sleeve is again subjected to a wall-ironing process by means of the third wall-ironing
ring 4. - It is noted here that the wall-ironing mandril 1 exhibits a reduction in diameter from the first part to the rear. This step is designated in Figs. 2, 3, 4, 5, 6, 7, 8 and 9 by
reference numeral 7. - Fig. 4 shows the end stage of the process. It is apparent from the drawing that by the cooperation of the wall-ironing mandril 1 with the third wall-ironing
ring 4 thesleeve 6 is subjected to a last reduction in thickness. Owing to the presence of thestep 7 the reduction is limited in the last case so that a thickened wall part is formed at the open end of the sleeve. - It will be apparent that the diameters of the wall-ironing
rings - initial thickness of sleeve wall 0.30 mm
- after the first ring 2:0.22 mm (wall thickness reduction 27%)
- after the second ring 3:0.16 mm (wall thickness reduction 27%)
- after the third ring 4:0.10 mm (wall thickness reduction 38%).
- In the detail of Fig. 5 reference symbols a and b designate the wall thickness of the sleeve body and the thickened wall part at the open end of the
sleeve 6, respectively. The dimension a is 0.10mm and b 0.16mm in accordance with the foregoing. - Figs. 6 to 9 schematically illustrate an embodiment of a device in accordance with the invention. The processing stage of Fig. 6 corresponds with that of Fig. 3. The processing stage of Fig. 8 corresponds with that of Fig. 4.
- The wall-ironing
mandril 8 embodying the invention shown in Figs. 6 to 9 has anannular recess 9. Referring to the description of the prior art and to Figs. 1 to 5 it will be obvious without further explanation how a wall-ironed sleeve 10 is deformed in the cold state by means of the device embodying the invention. The proportioning of the device, that is to say, the diameters of the wall-ironingrings mandril 8, also with regard to the initial thickness of thesleeve 10, is chosen so that after having passed through the second wall-ironingring 3 the sleeve wall has at least partly reached therecess 9 and that, moreover, the material located at the area of therecess 9 after the passage through thering 3 is located at least partly in the area of the hindmost part of the wall-ironingmandril 8 after having passed through thering 4, that is to say, the material forming the part of the relatively small diameter. - The latter will be apparent by considering the transition between the situation illustrated in Fig. 6 and that of Fig. 8.
- Figs. 7 and 9 show more in detail the deformation stages of the relevant part of the sleeve wall. In Figs. 7 and 9 some thicknesses are indicated by arrows. Reference line c corresponds to a thickness of 0.16 mm, d to 0.18 mm, e to 0.10mm,fto 0.12 mm and g to 0.18 mm.
- After the preceding explanation with respect to the invention there is no need for emphasizing that the basic idea of the invention resides in the change of thickness between e and g. According to the prior art a maximum reduction for a given material of 0.10 and 0.16 could be obtained. The invention provides in the present embodiment a thickness change of 0.10 and 0.18 mm for the same material.
- It will be obvious that the invention is not limited to the embodiment described above. Many modifications particularly of the diameter ratios given, can be applied without departing from the scope of the invention.
- An example of a variant of the embodiment described in the foregoing is illustrated in Fig. 11. Fig. 10 is a detailed view of a wall-ironing
mandril 10 having arecess 11 in the form of an uninterrupted groove. The structure of thismandril 10 corresponds with that of themandril 8 of Figs. 6 to 9. Fig. 11 shows a variant in which a wall-ironing mandril 12 has a recess 13 in the form of an additional step.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT81200864T ATE7367T1 (en) | 1980-07-30 | 1981-07-30 | CONTAINER WALL TRACING DEVICE. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8004356 | 1980-07-30 | ||
NL8004356A NL8004356A (en) | 1980-07-30 | 1980-07-30 | Coin rack device. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0045115A1 EP0045115A1 (en) | 1982-02-03 |
EP0045115B1 true EP0045115B1 (en) | 1984-05-09 |
Family
ID=19835682
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP81200864A Expired EP0045115B1 (en) | 1980-07-30 | 1981-07-30 | Wall-ironing device |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP0045115B1 (en) |
JP (1) | JPS57115922A (en) |
AT (1) | ATE7367T1 (en) |
AU (1) | AU555312B2 (en) |
CA (1) | CA1179206A (en) |
DE (1) | DE3163500D1 (en) |
NL (1) | NL8004356A (en) |
ZA (1) | ZA814566B (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59165722U (en) * | 1983-04-21 | 1984-11-07 | 昭和アルミニウム株式会社 | Processing mold |
NL8401834A (en) * | 1984-06-08 | 1986-01-02 | Thomassen & Drijver | METHOD AND APPARATUS FOR MANUFACTURING A HULL FOR A HOLDER, AND A MANUFACTURED HULL OR HOLDER. |
JP3156296B2 (en) * | 1991-09-04 | 2001-04-16 | トヨタ自動車株式会社 | Ironing method of cylindrical part of austenitic stainless steel material |
US5329799A (en) * | 1992-05-29 | 1994-07-19 | Toyota Jidosha Kabushiki Kaisha | Process and apparatus for press-forming tubular container-like article from strip, including forward and backward ironing steps |
DE4443434A1 (en) * | 1994-12-06 | 1996-06-20 | Schmalbach Lubeca | Wall thickness distribution in the can mouth section |
JP4472429B2 (en) * | 2004-05-31 | 2010-06-02 | ユニバーサル製缶株式会社 | DI can manufacturing method and bottle can |
JP5015120B2 (en) * | 2008-11-25 | 2012-08-29 | ユニバーサル製缶株式会社 | DI can manufacturing equipment |
PT2476494E (en) * | 2011-01-12 | 2013-10-17 | Ardagh Mp Group Netherlands Bv | Pressurised metal container preform and a method of making same |
EP3633053A1 (en) | 2014-04-30 | 2020-04-08 | Alcoa USA Corp. | Method of manufacturing an aluminum container made from aluminum sheet |
US20150343516A1 (en) * | 2014-05-30 | 2015-12-03 | Anheuser-Busch, Llc | Two iron tool pack for forming tall metal bottle shaped containers |
US11407022B2 (en) * | 2018-02-06 | 2022-08-09 | Tata Steel Ijmuiden B.V. | Process and apparatus for the production of a can body by wall ironing |
PL245172B1 (en) * | 2021-08-20 | 2024-05-27 | Canpack Spolka Akcyjna | Punch and semi-finished product and can produced using this punch |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3406554A (en) * | 1965-07-06 | 1968-10-22 | Continental Can Co | Apparatus for and method of forming containers |
US3951296A (en) * | 1971-09-02 | 1976-04-20 | National Steel Corporation | Reinforced wall-ironed container |
US3945231A (en) * | 1973-10-31 | 1976-03-23 | Toyo Seikan Kaisha Limited | Process and apparatus for preparation of thin walled cylindrical vessels |
FR2255976A1 (en) * | 1973-12-27 | 1975-07-25 | Daiwa Can Co Ltd | High speed mfr.of metal cans - with very thin wall, thickened at top to permit ejection without distortion |
JPS588924B2 (en) * | 1974-03-22 | 1983-02-18 | ヨシザキ コウゾウ | Itutai Kansei Keigo no Katanuki Oyouinisuru Hohou |
DE2758254A1 (en) * | 1977-12-27 | 1979-07-05 | Krupp Gmbh | DEVICE FOR STRIPPING AND STRIPPING ONE-PIECE CONTAINER CUPS |
JPS6011575B2 (en) * | 1978-07-26 | 1985-03-27 | 東洋製罐株式会社 | Method of manufacturing a metal integral container |
-
1980
- 1980-07-30 NL NL8004356A patent/NL8004356A/en not_active Application Discontinuation
-
1981
- 1981-07-06 ZA ZA814566A patent/ZA814566B/en unknown
- 1981-07-24 JP JP56117019A patent/JPS57115922A/en active Pending
- 1981-07-27 AU AU73471/81A patent/AU555312B2/en not_active Ceased
- 1981-07-29 CA CA000382796A patent/CA1179206A/en not_active Expired
- 1981-07-30 EP EP81200864A patent/EP0045115B1/en not_active Expired
- 1981-07-30 DE DE8181200864T patent/DE3163500D1/en not_active Expired
- 1981-07-30 AT AT81200864T patent/ATE7367T1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE3163500D1 (en) | 1984-06-14 |
EP0045115A1 (en) | 1982-02-03 |
CA1179206A (en) | 1984-12-11 |
AU555312B2 (en) | 1986-09-18 |
NL8004356A (en) | 1982-03-01 |
JPS57115922A (en) | 1982-07-19 |
ZA814566B (en) | 1982-07-28 |
AU7347181A (en) | 1982-02-04 |
ATE7367T1 (en) | 1984-05-15 |
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