EP0760784A1 - Gestufter falz für eine blechdose - Google Patents
Gestufter falz für eine blechdoseInfo
- Publication number
- EP0760784A1 EP0760784A1 EP95936439A EP95936439A EP0760784A1 EP 0760784 A1 EP0760784 A1 EP 0760784A1 EP 95936439 A EP95936439 A EP 95936439A EP 95936439 A EP95936439 A EP 95936439A EP 0760784 A1 EP0760784 A1 EP 0760784A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fold
- region
- hook
- folding
- geometry
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
- B65D7/12—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls
- B65D7/34—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls
- B65D7/36—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls formed by rolling, or by rolling and pressing
-
- 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
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
- B21D51/30—Folding the circumferential seam
- B21D51/32—Folding the circumferential seam by rolling
Definitions
- the technical field of the invention is the formation of a fold on a can closed by a lid, such as a beverage or tin can made of sheet metal.
- a fold has the task of holding the lid and can firmly together even against relatively high forces which can act from the outside, for example by pressure or impact, and from the inside, for example by overpressure or underpressure, and moreover the inside of the can against To hermetically seal the outside atmosphere.
- the compound material is prevented from migrating from the upper fold area when the fold is formed. Rather, the new fold geometry means that direct sheet metal contact in the upper fold edge area is avoided, so that here the one under compression
- Sealant performs the hermetic sealing function better than with direct sheet metal contact (claim 5).
- the area of the lid hook located at the bottom and outside of the finished seam with the surface area located above the free end of the fuselage hook is in firm, preferably form-fitting contact, while the upper area of the lid hook, which is close to the folded edge, is perceptible with respect to the lower area is displaced radially outwards, that is to say spaced from the adjacent sheet metal section of the fuselage hook (claim 6).
- the fold geometry can be checked and determined at any time on a cut through the fold seam of a closed can.
- the invention makes it possible, in addition to improving the fold, to work with sheet thicknesses below the dimensions customary today.
- the surface pressure of the sheet metal areas in the lower half to the lower third of the fold seam can go as far as mechanical locking occurs in the area of the lower edge of the fuselage hook.
- the fold as a whole is much more stable, both when using conventional sheets and with sheets which, on the other hand, are reduced in thickness.
- the flat pressure in the lower fold area (claim 6, claim 7) can lead to a locking step on the free edge of the flanged fuselage hook, which can take over holding and locking function in the direction of the can.
- the sealing or forming roller with which this fold contour is achieved or created, has two groove areas which have different diameters from the roller axis (claim 12, claim 13).
- the two groove areas are axially displaced relative to one another so as to form the transition area.
- the transition region (or more generally: the annular projection) opens into a cylindrical shape (claim 14) in order to give the lower region a similar shape when the fold is formed (claim 6, claim 7).
- the cylindrical section of the folding sealing roller VR1 runs parallel to the outer surface of the sealing head VK.
- Figure 1 shows in section a double fold according to the example of the invention.
- Figure 2 is a fold geometry according to the prior art.
- the geometry of the sealing head VK and (indicated) also the geometry of the sealing rollers VR and VRl as a counter-contour to the respective outer contour of the fold are shown.
- the outer contour of the (internal) capping head VK can be used unchanged to achieve the geometry of the fold according to the invention, so that all inner sheet metal layers 2, 1, 2a, la with the exception of the upper region 2b of the outer layer 2b, 2c of the lid hook, lie flat against one another and are essentially cylindrical or slightly conical to the axis of the container.
- Figure 1 shows a double fold according to the invention, as an example.
- the can wall is denoted by 1, the lid with its core wall by 2.
- the step 23 of the profile 30, 31 of the indicated fold-closing roller VR1 influences the influence of the fuselage hook lengths.
- FIG. 2 shows the fold design according to the prior art.
- the lid hook is also insufficiently clamped in FIG. 2, which can lead to leaks in the filled can, particularly in the case of thinner sheets.
- FIG 1 the closed fold of a tin can is shown (upper, edge-side cutout in cross section), in the contouring according to the example of the invention.
- the lid hook 2a engages in the fuselage hook la. Both lie tightly against each other in the overlap area.
- a sealing compound 10 is provided in the remaining area.
- the fold - the fold geometry - has a step 23 in the lower region 2c.
- the step 23 stabilizes the fold. If the radially inward flare pressure is high enough, the end region 21 of the fuselage hook 1 a receives an additional locking 2 d, which seals more tightly, but at the same time also takes on a holding and compensating function.
- the difference dimension d shown in FIG. 2 (as a function of the fuselage hook length R H ) is replaced in FIG. 1 by pressing a lower area 2c of the outer cover ring section 2b, 2c flat against the lower edge area 21 of the
- the height of the surface pressure should be equal to or greater than the expected length tolerance ⁇ R H , in the example it is about 1.5 times as large. In the example, the fold height is approximately three times larger than the flat contact area 2c with a height of 1.5- ⁇ R H.
- the step 23 mentioned in the area 2c can be selected gently to more abruptly.
- the closing direction contains the pressing roller VR1, which, with its groove contour 30, 31, effects the step 23 towards the (cylindrical) lower folding section 30 (compared to FIG. 2c).
- the step 23 can be introduced directly when folding (forming the fold); it can also be inserted in a separate step after the fold has been flanged on the outer contour of the fold.
- the corresponding process (one-stage or two-stage) is implemented in the capping machine with the VRl folding roller and the VK capping head.
- Existing folding machines can easily be converted.
- the plane of the fold is the plane that runs perpendicular to the axis of the box and lies approximately in the middle of the fold height that runs in the axis of the box. On average, it is illustrated in FIG. 2 on line b of the fold width.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Ceramic Products (AREA)
- Fertilizers (AREA)
- Crushing And Grinding (AREA)
- Control And Other Processes For Unpacking Of Materials (AREA)
- Tires In General (AREA)
- Closures For Containers (AREA)
Description
Claims
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4440628 | 1994-11-14 | ||
DE19944440628 DE4440628A1 (de) | 1994-11-14 | 1994-11-14 | Gestufter Falz |
DE9501566 | 1995-11-13 | ||
WOPCT/DE95/01566 | 1995-11-13 | ||
PCT/DE1995/001574 WO1996015036A1 (de) | 1994-11-14 | 1995-11-14 | Gestufter falz für eine blechdose |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0760784A1 true EP0760784A1 (de) | 1997-03-12 |
EP0760784B1 EP0760784B1 (de) | 1999-04-28 |
Family
ID=25941970
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95936439A Expired - Lifetime EP0760784B1 (de) | 1994-11-14 | 1995-11-14 | Gestufter falz für eine blechdose |
Country Status (13)
Country | Link |
---|---|
US (1) | US5947673A (de) |
EP (1) | EP0760784B1 (de) |
JP (1) | JPH10509649A (de) |
KR (1) | KR970707018A (de) |
CN (1) | CN1067644C (de) |
AT (1) | ATE179379T1 (de) |
AU (1) | AU3839495A (de) |
CA (1) | CA2205222A1 (de) |
DE (1) | DE59505783D1 (de) |
ES (1) | ES2133822T3 (de) |
GR (1) | GR3030808T3 (de) |
HK (1) | HK1005091A1 (de) |
WO (1) | WO1996015036A1 (de) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4446393C1 (de) * | 1994-12-23 | 1995-12-21 | Schmalbach Lubeca | Compound-Dip-Verfahren für Metalldosen |
ES2214104B1 (es) * | 2002-07-03 | 2005-12-16 | Bsh Electrodomesticos España, S.A. | Tambor de lavadora. |
US6736283B1 (en) * | 2002-11-19 | 2004-05-18 | Alcoa Inc. | Can end, tooling for manufacture of the can end and seaming chuck adapted to affix a converted can end to a can body |
CN112404887A (zh) * | 2020-09-23 | 2021-02-26 | 河南天义包装容器有限公司 | 一种高强度耐磨金属油桶的生产方法 |
CN115401129B (zh) * | 2022-11-01 | 2023-02-07 | 江苏九洲包装科技有限公司 | 一种用于薄壁马口铁的环形卷封装置及方法 |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3448E (fr) * | 1904-11-17 | Benjamin Adriance | Boites en tole | |
AT11925B (de) * | 1902-02-24 | 1903-05-25 | Benjamin Adriance | |
GB190315570A (en) * | 1903-07-14 | 1903-08-20 | Benjamin Adriance | Improvements in Sheet Metal Boxes and the like. |
US2327424A (en) * | 1941-06-19 | 1943-08-24 | Continental Can Co | Method of seaming cover ends to can bodies |
FR1533260A (fr) * | 1967-05-10 | 1968-07-19 | Carnaud & Forges | Perfectionnements aux sertis des boîtes métalliques, notamment pour conserves alimentaires |
US3688464A (en) * | 1970-02-25 | 1972-09-05 | Continental Can Co | Method of and apparatus for closing container |
DE2134034C3 (de) * | 1971-07-08 | 1980-04-17 | Rheinpfaelzische Blechemballagenfabrik G. Schoenung & Co Kg, 6730 Neustadt | Falzausbildung zwischen einem Metallbehälter und Ober- bzw. Unterboden |
BE793875A (fr) * | 1973-01-11 | 1973-07-11 | Travail Mecanique De La Tole S | Perfectionnements aux emballages tels que futs metalliques ou composites a fonds assembles par sertissage |
DE2352929C3 (de) * | 1973-10-22 | 1981-09-03 | Sulo Eisenwerk Streuber & Lohmann Gmbh & Co Kg, 4900 Herford | Mehrfachfalzverbindung |
US4037550A (en) * | 1974-06-27 | 1977-07-26 | American Can Company | Double seamed container and method |
FR2430276A1 (fr) * | 1978-07-07 | 1980-02-01 | Gallay Sa | Perfectionnements aux emballages metalliques ou composites avec fonds assembles par sertissage et aux outillages permettant leur realisation |
DE2924842A1 (de) * | 1979-06-20 | 1981-01-15 | Rissen Gmbh Maschf | Papierbehaelter, der aus einem mantelteil und einem bodenteil zusammengesetzt ist |
ZA807387B (en) * | 1979-12-08 | 1981-11-25 | Metal Box Co Ltd | Containers |
JPS57183947A (en) * | 1981-04-30 | 1982-11-12 | Nittetsu Drum Kk | Vessel made of metal, its manufacture and its device |
GB2098523B (en) * | 1981-05-14 | 1984-08-22 | Wellman Furnaces Ltd | Securing end covers to rotationally symmetric bodies |
DD158518B1 (de) * | 1981-05-14 | 1986-04-23 | Thale Eisen Huettenwerk | Falz mit mehrfacher Blechumschlingung für rotationssymmetrische Hohlkörper |
US4626158A (en) * | 1983-07-05 | 1986-12-02 | Gallay S.A. | Container seam and a process for forming a container seam |
GB8412244D0 (en) * | 1984-05-14 | 1984-06-20 | Metal Box Plc | Containers |
JPH02241631A (ja) * | 1989-03-13 | 1990-09-26 | Dainippon Printing Co Ltd | 金属蓋付容器および容器巻締装置 |
DE4007381A1 (de) * | 1990-03-08 | 1991-09-12 | Schmalbach Lubeca | Durch doppelfalznaht verschliessbare zwei- oder dreiteilige dose aus blech und verfahren zu ihrer herstellung |
-
1995
- 1995-11-14 WO PCT/DE1995/001574 patent/WO1996015036A1/de not_active Application Discontinuation
- 1995-11-14 DE DE59505783T patent/DE59505783D1/de not_active Expired - Lifetime
- 1995-11-14 AU AU38394/95A patent/AU3839495A/en not_active Abandoned
- 1995-11-14 KR KR1019970703162A patent/KR970707018A/ko not_active Application Discontinuation
- 1995-11-14 JP JP8515639A patent/JPH10509649A/ja active Pending
- 1995-11-14 CN CN95196203A patent/CN1067644C/zh not_active Expired - Fee Related
- 1995-11-14 AT AT95936439T patent/ATE179379T1/de not_active IP Right Cessation
- 1995-11-14 ES ES95936439T patent/ES2133822T3/es not_active Expired - Lifetime
- 1995-11-14 EP EP95936439A patent/EP0760784B1/de not_active Expired - Lifetime
- 1995-11-14 CA CA002205222A patent/CA2205222A1/en not_active Abandoned
- 1995-11-14 US US08/836,373 patent/US5947673A/en not_active Expired - Lifetime
-
1998
- 1998-05-19 HK HK98104328A patent/HK1005091A1/xx not_active IP Right Cessation
-
1999
- 1999-07-20 GR GR990401896T patent/GR3030808T3/el unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9615036A1 * |
Also Published As
Publication number | Publication date |
---|---|
JPH10509649A (ja) | 1998-09-22 |
US5947673A (en) | 1999-09-07 |
CA2205222A1 (en) | 1996-05-23 |
DE59505783D1 (de) | 1999-06-02 |
AU3839495A (en) | 1996-06-06 |
HK1005091A1 (en) | 1998-12-24 |
ES2133822T3 (es) | 1999-09-16 |
KR970707018A (ko) | 1997-12-01 |
WO1996015036A1 (de) | 1996-05-23 |
EP0760784B1 (de) | 1999-04-28 |
CN1067644C (zh) | 2001-06-27 |
GR3030808T3 (en) | 1999-11-30 |
CN1165504A (zh) | 1997-11-19 |
ATE179379T1 (de) | 1999-05-15 |
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