CA1179206A - Wall ironing device - Google Patents
Wall ironing deviceInfo
- Publication number
- CA1179206A CA1179206A CA000382796A CA382796A CA1179206A CA 1179206 A CA1179206 A CA 1179206A CA 000382796 A CA000382796 A CA 000382796A CA 382796 A CA382796 A CA 382796A CA 1179206 A CA1179206 A CA 1179206A
- Authority
- CA
- Canada
- Prior art keywords
- wall
- ironing
- recess
- sleeve
- mandrel
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Vending Machines For Individual Products (AREA)
- Supplying Of Containers To The Packaging Station (AREA)
- Auxiliary Devices For And Details Of Packaging Control (AREA)
- Baking, Grill, Roasting (AREA)
- Metal Extraction Processes (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
Abstract
Abstract of the Disclosure A device for wall-ironing sleeves having a wall portion of a wall thickness enlarged with respect to the wall thickness of the sleeve body near the open end. The device comprises at least two wall-ironing rings and a wall-ironing mandrel adapted to move through the rings and having a cylindrical front part and cylindrical rear part of reduced diameter, charac-terized in that the front part of the wall-ironing mandrel has an annular recess of a predetermined depth near the rear part.
Description
~ t~
The invention relates to a device for wall-ironing sleeves, e.g., can bodies, containers having a wall portion near the open end with an increased thickness relative to the wall thickness of the sleeve body, the device comprising at least two wall-ironing rings and a wall-ironing mandrel movable through the rings and having a cylindrical front part and a cylindrical rear part of reduced diameter.
An increased 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 thin-drawing mandrel according to the prior art exhibits a front cylindrical part and the cylindrical rear part of reduced diameter.
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 thin-drawing mandrel not earlier than in the third ring. This means that in the known technique the thickness of the wall portion can never exceed the wall thickness after the second ring.
It may occur that a greater difference of wall thickness between the wall portion of increased 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 desired.
In both cases, the wall thickness reduction at 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 wall thickness difference can be increased without the need for increasing the relative wall thickness reduction at the nth ring.
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 mandrel, at a portion near the rear part, exhibits an annular recess of a predetermined depth. There are "n" ironing rings.
The position of said recess being chosen is such that after having passed through the n-l wall-ironing ring, the sleeve wall has at least partly reached the anmllar recess, and the sleeve has reached the rear part after having passed through the nth wall-ironing ring.
The depth of the recess is preferably deter-mined in connection with the desired increase of the difference in thickness between the wall portion of wall thickness and the sleeve body.
The invention furthermore provides a wall-ironing mandrel having a cylindrical front part and a cylindrical rear part of reduced diameter for use in a device of the kind set forth, said wall-ironing mandrel embodying the invention being characterized in that at its end near 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 drawings:
Fig. 1 is a cross-sectional view of a known wall-ironing device in the first stage of the wall-ironing process;
Fig. 2 is a view like Fig. 1 in a second stage, Fig. 3 is a view like Figs. 1 and 2 in a third stage;
~7~
Fig. 4 is a view like Figs. 1, 2 and 3 in the end stage of the known wall-ironing process, Fig. 5 is a detail indicated in Fig. 4 by V, Fig. 6 is a sectional view of a device embodying the invention in the same process stage as in Fig. 3;
Fig. 7 is a detail indicated in Fig~ 6 by VII, Fig. 8 is a view like Fig~ 6 of the device embodying the invention in the same process stage as in Fig. 4, Fig. 9 is a detail indicated in Fig. 8 by I~, Fig. 10 is a sectional view of a wall-ironing mandrel having a recess in the form of a groove in detail, and Fig. 11 is a detailed sectional view of a wall-ironing mandrel 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 mandrel 1, a first wall-ironing ring 2, a second wall-ironing ring 3, a third wall-ironing ring 4, said wall-ironing rings being relatively coupled by means of a frame 5. Known means for advancing the wall-ironing mandrel 1 in an axial direction relative to the unit 2, 3, 4, 5 indicated by an arrow are not shown.
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 mandrel 1 with the first wall-ironing ring 2.
1~¦~7~
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.
It is noted here that the wall-ironing mandrel 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, and 8 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 mandrel 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.
It will be apparent that the diameters of the thin-drawing rings 2, 3 and 4 are chosen so that the wall of the sleeve is slightly rolled to greater thinness at each ring. Usual wall thicknesses in the various stages are:
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 _ and _ designate the wall thickness of the sleeve body and the thickened wall part at the open end of the sleeve, respec-tively. The dimension _ is 0.10 mm and _ 0.16 mm in accordance with the foregoing.
Figs. 6 to 9 schematically illustrate an embodi-ment of a device in accordance with the invention. The processing stage of Fig. 6 corresponds with that of Fig~ 3.
~3 r~9f~
l'he processing stage of Fig. 8 corresponds with that of Fig. 4-The wall-ironing mandrel 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, that is to say, the diameters of the wall-ironing rings 2, 3, 4, the various diameters of the wall-ironing mandrel 8, also with regard to the initial thickness of the sleeve 10, 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 rearmost part of the wall-ironing mandrel 8 after having passed through the ring 4, that is to say, the material forming the part of the relatively small diameter.
The width of the annular recess can be between 5 to 10 mm.
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 thick-ness of 0.16 mm, _ to 0.18 mm, _ to 0.10 mm, f to 0.12 mm and g to 0.18 mm.
The change of thickness between e and ~ is considered important. 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.
The invention is not limited to the embodiment described above. Man~ 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 mandrel 10 having a recess 11 in the form of an uninterrupted groove. The structure of this mandrel 10 corresponds with that of the mandrel 8 of Figs. 6 to 9. Fig. 11 shows a variant in which a wall-ironing mandrel 12 has a recess 13 in the form of an additional step.
-~ "
. . ~ r.
The invention relates to a device for wall-ironing sleeves, e.g., can bodies, containers having a wall portion near the open end with an increased thickness relative to the wall thickness of the sleeve body, the device comprising at least two wall-ironing rings and a wall-ironing mandrel movable through the rings and having a cylindrical front part and a cylindrical rear part of reduced diameter.
An increased 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 thin-drawing mandrel according to the prior art exhibits a front cylindrical part and the cylindrical rear part of reduced diameter.
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 thin-drawing mandrel not earlier than in the third ring. This means that in the known technique the thickness of the wall portion can never exceed the wall thickness after the second ring.
It may occur that a greater difference of wall thickness between the wall portion of increased 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 desired.
In both cases, the wall thickness reduction at 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 wall thickness difference can be increased without the need for increasing the relative wall thickness reduction at the nth ring.
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 mandrel, at a portion near the rear part, exhibits an annular recess of a predetermined depth. There are "n" ironing rings.
The position of said recess being chosen is such that after having passed through the n-l wall-ironing ring, the sleeve wall has at least partly reached the anmllar recess, and the sleeve has reached the rear part after having passed through the nth wall-ironing ring.
The depth of the recess is preferably deter-mined in connection with the desired increase of the difference in thickness between the wall portion of wall thickness and the sleeve body.
The invention furthermore provides a wall-ironing mandrel having a cylindrical front part and a cylindrical rear part of reduced diameter for use in a device of the kind set forth, said wall-ironing mandrel embodying the invention being characterized in that at its end near 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 drawings:
Fig. 1 is a cross-sectional view of a known wall-ironing device in the first stage of the wall-ironing process;
Fig. 2 is a view like Fig. 1 in a second stage, Fig. 3 is a view like Figs. 1 and 2 in a third stage;
~7~
Fig. 4 is a view like Figs. 1, 2 and 3 in the end stage of the known wall-ironing process, Fig. 5 is a detail indicated in Fig. 4 by V, Fig. 6 is a sectional view of a device embodying the invention in the same process stage as in Fig. 3;
Fig. 7 is a detail indicated in Fig~ 6 by VII, Fig. 8 is a view like Fig~ 6 of the device embodying the invention in the same process stage as in Fig. 4, Fig. 9 is a detail indicated in Fig. 8 by I~, Fig. 10 is a sectional view of a wall-ironing mandrel having a recess in the form of a groove in detail, and Fig. 11 is a detailed sectional view of a wall-ironing mandrel 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 mandrel 1, a first wall-ironing ring 2, a second wall-ironing ring 3, a third wall-ironing ring 4, said wall-ironing rings being relatively coupled by means of a frame 5. Known means for advancing the wall-ironing mandrel 1 in an axial direction relative to the unit 2, 3, 4, 5 indicated by an arrow are not shown.
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 mandrel 1 with the first wall-ironing ring 2.
1~¦~7~
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.
It is noted here that the wall-ironing mandrel 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, and 8 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 mandrel 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.
It will be apparent that the diameters of the thin-drawing rings 2, 3 and 4 are chosen so that the wall of the sleeve is slightly rolled to greater thinness at each ring. Usual wall thicknesses in the various stages are:
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 _ and _ designate the wall thickness of the sleeve body and the thickened wall part at the open end of the sleeve, respec-tively. The dimension _ is 0.10 mm and _ 0.16 mm in accordance with the foregoing.
Figs. 6 to 9 schematically illustrate an embodi-ment of a device in accordance with the invention. The processing stage of Fig. 6 corresponds with that of Fig~ 3.
~3 r~9f~
l'he processing stage of Fig. 8 corresponds with that of Fig. 4-The wall-ironing mandrel 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, that is to say, the diameters of the wall-ironing rings 2, 3, 4, the various diameters of the wall-ironing mandrel 8, also with regard to the initial thickness of the sleeve 10, 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 rearmost part of the wall-ironing mandrel 8 after having passed through the ring 4, that is to say, the material forming the part of the relatively small diameter.
The width of the annular recess can be between 5 to 10 mm.
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 thick-ness of 0.16 mm, _ to 0.18 mm, _ to 0.10 mm, f to 0.12 mm and g to 0.18 mm.
The change of thickness between e and ~ is considered important. 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.
The invention is not limited to the embodiment described above. Man~ 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 mandrel 10 having a recess 11 in the form of an uninterrupted groove. The structure of this mandrel 10 corresponds with that of the mandrel 8 of Figs. 6 to 9. Fig. 11 shows a variant in which a wall-ironing mandrel 12 has a recess 13 in the form of an additional step.
-~ "
. . ~ r.
Claims (3)
1. A device for wall-ironing sleeves having a wall thickness of the sleeve body near the open end which is increased relative to the sleeve body, said device comprising at least n wall-ironing rings and a wall-ironing mandrel adapted to move through said rings and having a cylindrical front part and a cylin-drical rear part of reduced diameter, characterized in that the front part of the wall-ironing mandrel includes an annular recess of a predetermined depth near the rear part, the location of said recess being chosen such that after having passed through the n-l wall-ironing ring, the sleeve wall has at least partly reached the recess, and the sleeve has reached the rear part after having passed through the nth wall-ironing ring.
2. A device as claimed in claim 1, characterized in that the depth of said recess is related with the desired increase of the difference in wall thickness between said wall portion of increased wall thickness and the sleeve body.
3. A wall-ironing mandrel as claimed in claim 1, characterized in that the width of the recess is of the order of magnitude of 5 to 10 mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NLNOA8004356 | 1980-07-30 | ||
| NL8004356A NL8004356A (en) | 1980-07-30 | 1980-07-30 | Coin rack device. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1179206A true CA1179206A (en) | 1984-12-11 |
Family
ID=19835682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000382796A Expired CA1179206A (en) | 1980-07-30 | 1981-07-29 | 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 |
| PL2476494T3 (en) * | 2011-01-12 | 2014-01-31 | Ardagh Mp Group Netherlands Bv | Pressurised metal container preform and a method of making same |
| CN105039878B (en) | 2014-04-30 | 2017-11-07 | 美铝美国公司 | The aluminium vessel that aluminium sheet and the aluminium sheet with high formability are made |
| US20150343516A1 (en) * | 2014-05-30 | 2015-12-03 | Anheuser-Busch, Llc | Two iron tool pack for forming tall metal bottle shaped containers |
| CN111699057B (en) * | 2018-02-06 | 2022-11-01 | 塔塔钢铁艾默伊登有限责任公司 | Method and apparatus for producing can bodies by wall drawing |
| PL245172B1 (en) * | 2021-08-20 | 2024-05-27 | Canpack Spolka Akcyjna | A stamp and a semi-finished product and a can produced using this stamp |
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 AT AT81200864T patent/ATE7367T1/en not_active IP Right Cessation
- 1981-07-30 EP EP81200864A patent/EP0045115B1/en not_active Expired
- 1981-07-30 DE DE8181200864T patent/DE3163500D1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| AU555312B2 (en) | 1986-09-18 |
| ZA814566B (en) | 1982-07-28 |
| EP0045115B1 (en) | 1984-05-09 |
| EP0045115A1 (en) | 1982-02-03 |
| AU7347181A (en) | 1982-02-04 |
| DE3163500D1 (en) | 1984-06-14 |
| ATE7367T1 (en) | 1984-05-15 |
| JPS57115922A (en) | 1982-07-19 |
| NL8004356A (en) | 1982-03-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |