WO2024260563A1 - Verfahren zur herstellung eines blechdeckels - Google Patents
Verfahren zur herstellung eines blechdeckels Download PDFInfo
- Publication number
- WO2024260563A1 WO2024260563A1 PCT/EP2023/066993 EP2023066993W WO2024260563A1 WO 2024260563 A1 WO2024260563 A1 WO 2024260563A1 EP 2023066993 W EP2023066993 W EP 2023066993W WO 2024260563 A1 WO2024260563 A1 WO 2024260563A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cup
- collar
- flange
- edge
- bowl
- 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.)
- Pending
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
- B21D51/00—Making hollow objects
- B21D51/16—Making hollow objects characterised by the use of the objects
- B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
- B21D51/44—Making closures, e.g. caps
Definitions
- the invention relates to a method for producing a sheet metal lid and to a sheet metal lid produced by the method according to the preambles of the independent patent claims.
- Metal lids for food packaging such as food cans, are typically punched out of metal strips or made from the severed bottom ends of deep-drawn cup-like metal containers, the remaining part of which can then also form the frame of the finished filled packaging.
- metal lids are to be attached to the packaging body by means of a flange, it is advisable to design them as a flat bowl with a flanged edge, which can be inserted with the base of the bowl into one end of the body so as to fit snugly and then connected to it by flange.
- Severed bottom ends of deep-drawn cup-like metal containers are already bowl-shaped, so that they only have to be provided with a suitable flanged edge in order to be able to be used as a flanged sheet metal lid for a suitable frame.
- the task is therefore to provide technical solutions which do not have the previously mentioned disadvantages of the state of the art or at least partially avoid them.
- a first aspect of the invention relates to a method for producing a metal lid, in particular for use as a base for a food can.
- a deep-drawn cup-like container with a cup opening, a closed cup bottom and a surrounding cup wall extending between the cup bottom and the cup opening is produced.
- the cup bottom and part of the cup wall are separated from this container in such a way that the separated part of the cup wall forms a collar of uniform height around the cup bottom.
- This collar is widened in a first forming operation at its end facing away from the cup bottom, such that this end forms a flange-like edge around a bowl formed by the cup bottom and the lower end of the collar.
- the method according to the invention makes it possible to avoid the disadvantages of the prior art described at the outset.
- the flange-like edge is deformed during clamping.
- a circumferential limiting collar can be formed around the flange-like edge, which advantageously stands up from the flange-like edge on the side facing away from the bowl.
- Such an edge can be used to form a flanged connection when the sheet metal lid is used as intended.
- the collar is preferably widened in such a way that the cup base is clamped between tool parts and the collar is then pushed with its end facing away from the cup base into a guide gap formed between tool parts and is thereby widened. This type of procedure has proven to be particularly suitable.
- the collar is shaped when pushed into the gap in such a way that the flange-like edge formed by its end facing away from the cup base is surrounded by a peripheral limiting collar, which advantageously stands up from the flange-like edge on the side facing away from the bowl.
- a peripheral limiting collar which advantageously stands up from the flange-like edge on the side facing away from the bowl.
- the circumferential limiting collar is essentially cylindrical.
- the limiting collar is drawn radially inwards at its free end. This facilitates subsequent rolling of the collar to produce a flanged connection.
- This drawing in of the collar can be carried out, for example, by a rolling process or by a pressing process, as shown in the example shown in the figures.
- the inverted bowl produced during the pushing through preferably has an outer diameter which essentially corresponds to the inner diameter of the original deep-drawn cup-like container. This makes it possible to use the remaining separated part of the original deep-drawn cup-like container as a can body which is closed with the sheet metal lid according to the invention after being filled with a filling material.
- the cup-like container produced is provided on the inside with a first coating, e.g. a coating suitable for food, and is provided on the outside with a second coating which is different from the first coating, e.g. an abrasion-resistant and corrosion-resistant coating.
- a first coating e.g. a coating suitable for food
- a second coating which is different from the first coating, e.g. an abrasion-resistant and corrosion-resistant coating.
- the deep-drawn cup-like container produced has a substantially cylindrical cup interior and/or that it is produced from a sheet metal blank made of sheet steel or aluminum. Such containers have proven to be particularly suitable.
- a second aspect of the invention relates to a sheet metal lid produced by the method according to the first aspect of the invention.
- Fig. I f is a sectional view of the finished sheet metal cover resulting from the intermediate products according to Figures la to le;
- Figures 2a to 2c are sectional views through the forming tools during a first forming operation in three different stages of progress;
- Figures 3a to 3c are sectional views through the forming tools during a second forming operation in three different stages of progress;
- Figures 4a to 4c are sectional views through the forming tools during a third forming operation in three different stages of progress.
- Figures la to le show perspective top views ( Figures la and 1b) and sections ( Figures 1c, 1d and le) of the various intermediate products in the inventive production of the inventive sheet metal lid 1, which is shown in a side view in Fig. I f.
- Fig. 1a shows the deep-drawn cup-like container 2, which is provided as a starting product for the inventive manufacture of the sheet metal lid 1.
- This has a cup opening 3, a closed cup bottom 4 and a
- the cup wall 5 extends around the cup bottom 4 and the cup opening 3.
- Fig. 1b shows the state after the cup bottom 4 with a part of the cup wall 5 has been separated from the container 2 in such a way that the part of the cup wall which has also been separated forms a collar 6 of uniform height running around the cup bottom.
- Fig. 1c shows the cup bottom 4 separated from the cup upper part with the circumferential collar 6 formed by a part of the previous cup wall 5.
- Fig. 1d shows the cup bottom 4 separated from the cup upper part with the circumferential collar 6 formed by a part of the previous cup wall 5 after the expansion of the collar 6 according to the first forming operation shown in Figures 2a to 2c.
- the widened end of the collar 6 facing away from the cup base 4 now forms a flange-like edge 7 around a bowl formed by the cup base 4 and the lower end of the collar 6.
- the flange-like edge 7 is surrounded by a circumferential, cylindrically shaped limiting collar 10, which stands up from the flange-like edge 7 on the side facing away from the bowl.
- Fig. 1e shows the bowl surrounded by a flange-like edge 7 with a cylindrically shaped peripheral collar 10 after the bowl has been pushed through from the underside of the bowl according to Fig. 1d in a second forming operation such that an inverted bowl is created, the inside of which is formed from the outside of the previous bowl.
- This second forming operation is shown in Figs. 3a to 3c.
- a sheet metal cover according to the invention according to claim 14 already exists.
- Fig. I f shows the finished sheet metal cover 1, which differs from the sheet metal cover shown in Fig. le only in that in a third forming operation, which is shown in Figures 4a to 4c. is set, the limiting collar 10 has been retracted radially inwards at its free end.
- the first forming operation in which the cup bottom 4 separated from the cup upper part with the circumferential collar 6 formed by a part of the previous cup wall 5 according to Fig. 1c is brought into the shape shown in Fig. 1d, is shown in Figures 2a to 2c by means of sectional views through the forming tools at three different stages of progress.
- the cup base 4 is clamped between a first tool part 8 and a second tool part 9 (Fig. 2a).
- a guide gap 13 is then formed between a third tool part 11 and a fourth tool part 12 (Fig. 2b), and the collar 6 is then pushed into the guide gap 13 with its end facing away from the cup base 4, where it is widened in such a way that the widened end of the collar 6 facing away from the cup base 4 forms a flange-like edge 7 around a bowl formed by the cup base 4 and the lower end of the collar 6, and the flange-like edge 7 is surrounded by a circumferential, cylindrically shaped limiting collar 10 which protrudes from the flange-like edge 7 on the side facing away from the bowl (Fig. 2c).
- the second forming operation in which the intermediate product resulting from the first forming operation is brought into the shape shown in Fig. Id according to Fig. I f, is shown in Figures 3a to 3c using sectional views through the forming tools at three different stages of progress.
- the flange-like edge 7 is clamped between a fifth tool part 14 and a sixth tool part 15 ( Figures 3a and 3b), and in this state the cup is then pushed through from the bottom of the cup with a seventh tool part 16, in such a way that an inverted cup is created. whose inner side is formed by the outer side of the previous bowl ( Fig. 3c ) .
- the inverted bowl produced during the inversion has an outer diameter which essentially corresponds to the inner diameter of the original deep-drawn cup-like container 2.
- the third forming operation in which the intermediate product resulting from the second forming operation is brought into the shape shown in Fig. 1e according to Fig. 1f, is shown in Figs. 4a to 4c by means of sectional views through the forming tools at three different stages of progress.
- the flange-like edge 7 is clamped between an eighth tool part 17 and a ninth tool part 18 ( Figures 4a and 4b), and in this state the limiting collar 10 is then drawn radially inwards at its free end by means of a tenth tool part 19, so that an inwardly directed "curl" 20 is created. This takes place here in the pressing process.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Closing Of Containers (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202380099609.6A CN121368510A (zh) | 2023-06-22 | 2023-06-22 | 用于制造金属板盖的方法 |
| PCT/EP2023/066993 WO2024260563A1 (de) | 2023-06-22 | 2023-06-22 | Verfahren zur herstellung eines blechdeckels |
| TW113121602A TW202513179A (zh) | 2023-06-22 | 2024-06-12 | 製造板金蓋的方法 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/EP2023/066993 WO2024260563A1 (de) | 2023-06-22 | 2023-06-22 | Verfahren zur herstellung eines blechdeckels |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024260563A1 true WO2024260563A1 (de) | 2024-12-26 |
Family
ID=87036800
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2023/066993 Pending WO2024260563A1 (de) | 2023-06-22 | 2023-06-22 | Verfahren zur herstellung eines blechdeckels |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN121368510A (de) |
| TW (1) | TW202513179A (de) |
| WO (1) | WO2024260563A1 (de) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003082496A1 (en) * | 2002-03-27 | 2003-10-09 | Metal Container Corporation | Method and apparatus for making a can lid shell |
| WO2016190969A1 (en) * | 2015-05-27 | 2016-12-01 | Stolle Machinery Company, Llc | Container, and selectively formed shell, and tooling and associated method for providing same |
-
2023
- 2023-06-22 WO PCT/EP2023/066993 patent/WO2024260563A1/de active Pending
- 2023-06-22 CN CN202380099609.6A patent/CN121368510A/zh active Pending
-
2024
- 2024-06-12 TW TW113121602A patent/TW202513179A/zh unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003082496A1 (en) * | 2002-03-27 | 2003-10-09 | Metal Container Corporation | Method and apparatus for making a can lid shell |
| WO2016190969A1 (en) * | 2015-05-27 | 2016-12-01 | Stolle Machinery Company, Llc | Container, and selectively formed shell, and tooling and associated method for providing same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN121368510A (zh) | 2026-01-20 |
| TW202513179A (zh) | 2025-04-01 |
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