EP0567580A1 - Procede de fabrication d'un tube par roulage d'une bande metallique contrecollee sur une bande de carton. - Google Patents
Procede de fabrication d'un tube par roulage d'une bande metallique contrecollee sur une bande de carton.Info
- Publication number
- EP0567580A1 EP0567580A1 EP92904851A EP92904851A EP0567580A1 EP 0567580 A1 EP0567580 A1 EP 0567580A1 EP 92904851 A EP92904851 A EP 92904851A EP 92904851 A EP92904851 A EP 92904851A EP 0567580 A1 EP0567580 A1 EP 0567580A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cardboard
- strip
- metal
- rolling
- tubes
- 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
- B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
- B65D3/22—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines with double walls; with walls incorporating air-chambers; with walls made of laminated material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31C—MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31C3/00—Making tubes or pipes by feeding obliquely to the winding mandrel centre line
Definitions
- the present invention relates to a method of manufacturing a tube by rolling a metal strip laminated onto a cardboard strip.
- the tubes produced according to this process can in particular be used in all pyrotechnic applications, but are also used for the production of mandrels, cylindrical casings, colonnades with or without external decorations, various pieces of furniture, shelves, chests, or else of cans.
- firing mortars are generally in the form of tubes produced by parallel or spiral rolling of cardboard strips.
- These cardboard tubes which must withstand high pressures and temperatures due to their use in the form of mortar, have significant drawbacks, namely poor resistance to humidity, very low burst strength, as well as an unsatisfactory fire resistance. It is known to remedy these various drawbacks by the use of adhesives and / or water-repellent and flame-retardant coatings impregnating the strips of cardboard or rolled paper to form the tube, a possible addition of an aluminum or material covering. synthetic, of the type of a polyethylene, allowing, in addition, to further increase the resistance to humidity.
- the burst strength is improved by simply thickening the tube by rolling several strips of high quality cardboard.
- the tubes obtained in this way are complex to manufacture, relatively expensive, and being nevertheless made only of cardboard, they are naturally fragile and therefore unreliable.
- tubes made of steel are known, and in particular those described in French patent FR-2 578 810 which relates to a method of manufacturing a metal container intended to receive ammunition.
- the container body is made from
- the metal body of a container manufactured in this way is unusable in the field of pyrotechnics; in fact, the metal tube thus formed necessarily has discontinuities which do not make it possible to obtain smooth and calibrated walls, desirable for correct ejection of the pyrotechnic charges after explosion of the primer in the mortar; in addition, the manufacture of such tubes can only be done, in an industrial manner, by means of a specific machine very different from those which are commonly used for the parallel or spiral rolling of cardboard tubes.
- the present invention aims to remedy these drawbacks by proposing a method for manufacturing a reinforced cardboard and metal tube, characterized in that said tube is obtained by convolute or spiral rolling of at least one thick metal strip previously laminated on to minus a strip of cardboard.
- the thick metal strip laminated to the cardboard strip constitutes a mechanical barrier providing excellent resistance to fire and humidity, as well as a particularly high resistance to bursting and crushing.
- the thick metallic strip used according to the invention is very different from thin and ductile metallic films, in particular aluminum, which are normally used, alone or in combination with polyethylene or paper, to improve the sealing of the tubes.
- cardboard-based the thickness of the thin films used as a sealing barrier does not exceed a few tens of
- LOCATION SHEET micrometers such an aluminum film can not contribute in any way to the rigidity of the assembly.
- the prior bonding of a strip of cardboard to a metal strip can be carried out just before they are rolled or not.
- the manufacture of a reinforced tube requires the following successive operations to be carried out: a) bonding of a metal strip, such as more or less hardened steel, on a sheet of cardboard of the same type dimensions, b) splitting of the metal / cardboard complex obtained, for example after constitution of rolls from which wafers are cut radially at an inclination and a width adapted to the rolling conditions, c) installation of wafers or coils of at least one strip of a metal / cardboard complex on the reels of a tube rolling machine, for example a spiraling machine, d) installation of wafers or coils of at least one external cardboard retaining strip, e) rolling of said strips at the edge on board or partially overlapping depending on the end use of the tubes, f) optionally, cutting the tubes continuously.
- the first step namely the bonding of a metal strip on at least one sheet of cardboard is delicate and must be carried out under well-controlled conditions; in particular, it is advisable to use hot glues reactivated when laminating the two materials, for example polymerizable resins, dextrins, or holt-melts.
- the choice of bonding temperature is made according to the glue used, which mainly depends on the type of cardboard rather than the nature of the metal strip; it is also advisable to exert a strong pressure on each face of the cardboard / metal complex during the bonding, this pressure being supplied by cylinders superposed between
- An essential advantage of this first variant of the invention is that the strips produced by slitting sheets of cardboard / metal complex, presented in rolls under traditional circular shears, can be fairly easily mounted on existing rolling machines without much modification of the latter; in this regard, it is only necessary to modify, on a spiraling machine, the system for transferring the reels to the machine magazine, the system for tensioning the belts, the continuous cut-off members for the tubes, and in particular the circular knives and their cutting pressure.
- steps a) to c) of the previous variant are omitted and replaced by direct lamination of the two strips of cardboard and metal on the rolling machine; in this case, cardboard wafers and wafers of a metal strip are installed separately on the reels of the machine, then the strips are coated with an appropriate glue and finally laminated by hot pressing.
- the strip of the cardboard / metal complex which has just been produced is wound on the mandrel of the rolling machine under conditions identical to those of steps d) to f) of the first variant.
- FIG. 1 is a perspective view of a spiral tube from an outer cardboard strip and an inner cardboard / metal strip in accordance with the invention
- FIG. 2 is a cross section of the tube thus produced.
- a reinforced tube according to the invention can comprise a strip 1 of cardboard / metal complex, the metal face 2 of which faces towards the inside of said tube.
- This strip 1 is spiraled from edge to edge to form a continuous tube, practically smooth on its internal face. It is held by one or more external strips 3 of cardboard, the same width as that of the strip 1 of cardboard / metal complex.
- the outer strip (s) 3 are spiraled into contiguous turns around the strip 1 with an axial offset preferably equal to half of said width.
- the bonding is carried out dynamically in a conventional manner by means of adhesives such as those already mentioned; the bonding conditions are perfectly known to those skilled in the art and the viscosity of the adhesives, the bonding temperature and the pressure exerted on the two strips 1 and 3 must in particular be adjusted.
- a first cardboard strip is rolled on the mandrel of a rolling machine while gluing on this first strip a strip of cardboard / metal complex, the cardboard face being turned
- a first strip of the cardboard / metal complex is presented on the mandrel of the spiraling machine with its metal face facing inwards, on which one has just stuck, with an offset of half a width.
- a second strip of the cardboard / metal complex the metal face this time facing outwards.
- a reinforced tube is made having its internal and external metallic faces.
- cardboard / metal tubes whose successive turns overlap with the same ease as to manufacture smooth tubes. All the combinations between an overlapping internal strip, made of cardboard or a cardboard / metal complex, and an external strip, made of cardboard or a cardboard / metal complex, are also conceivable and their implementation depends on the intended application.
- a reinforced tube according to the invention for example from a strip 1 of the complex consisting of a metal strip 2 of work hardened steel of 15 hundredths of a millimeter laminated to a strip of cardboard 4 of 40 hundredths of a millimeter, this strip 1 of cardboard / metal complex being held by an external strip 3 of cardboard also 40 hundredths, has a final thickness of about 1.25 millimeters (the difference coming from the thicknesses of glues) and has a resistance to
- the weight of the tube according to the invention is then divided by a factor ranging from 2 to 4 compared to that of the cardboard tube; this also provides an important advantage in the transportation of said tubes.
- the thickness of the metal strip 2 of the strip 1 of the cardboard / metal complex can be chosen, for a more or less work hardened steel, in a range between 15 and 200 hundredths of a millimeter (fig.l).
- a strip of cardboard 4 of 40 hundredths is sufficient in most cases; however, it is always possible to adapt this thickness by doubling or even tripling the layer of retaining cardboard, that is to say by rolling several external strips 3 of cardboard.
- a cardboard / metal tube is formed with an outer cardboard face
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9100512A FR2671780B1 (fr) | 1991-01-17 | 1991-01-17 | Procede de fabrication d'un tube par roulage d'une bande metallique contrecollee sur une bande de carton. |
FR9100512 | 1991-01-17 | ||
PCT/FR1992/000040 WO1992012902A1 (fr) | 1991-01-17 | 1992-01-16 | Procede de fabrication d'un tube par roulage d'une bande metallique contrecollee sur une bande de carton |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0567580A1 true EP0567580A1 (fr) | 1993-11-03 |
EP0567580B1 EP0567580B1 (fr) | 1994-10-12 |
Family
ID=9408790
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92904851A Expired - Lifetime EP0567580B1 (fr) | 1991-01-17 | 1992-01-16 | Procede de fabrication d'un tube par roulage d'une bande metallique contrecollee sur une bande de carton |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0567580B1 (fr) |
DE (1) | DE69200525D1 (fr) |
FR (1) | FR2671780B1 (fr) |
WO (1) | WO1992012902A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2208106B1 (es) * | 2002-10-30 | 2005-10-01 | Jesus Sanchez Reñasco | Maquina para la fabricacion de cuerpos tubulares. |
WO2004039570A1 (fr) * | 2002-10-30 | 2004-05-13 | Sanchez Renasco Jesus | Machine pour la fabrication de corps tubulaires |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2948200A (en) * | 1958-01-13 | 1960-08-09 | Westerbarkey Lorenz | Method and apparatus for winding and cementing tubes or hose |
FR1316315A (fr) * | 1962-02-28 | 1963-01-25 | Robinson & Sons Ltd | Procédé de fabrication de tubes enroulés et produits industriels nouveaux, notamment corps de boîtes cylindriques, obtenus par sa mise en oeuvre |
US3716435A (en) * | 1970-11-16 | 1973-02-13 | American Can Co | Method of making a container body |
FR2427847A2 (fr) * | 1978-06-08 | 1980-01-04 | Sireix Georges | Dispositif d'encollage de materiaux en bandes |
DE3413619A1 (de) * | 1984-04-11 | 1985-10-24 | DVG Deutsche Verpackungsmittel GmbH, 8505 Röthenbach | Verfahren zur herstellung einer verpackungshuelse und verpackungshuelse |
-
1991
- 1991-01-17 FR FR9100512A patent/FR2671780B1/fr not_active Expired - Fee Related
-
1992
- 1992-01-16 WO PCT/FR1992/000040 patent/WO1992012902A1/fr active IP Right Grant
- 1992-01-16 EP EP92904851A patent/EP0567580B1/fr not_active Expired - Lifetime
- 1992-01-16 DE DE69200525T patent/DE69200525D1/de not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9212902A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2671780B1 (fr) | 1994-10-28 |
FR2671780A1 (fr) | 1992-07-24 |
EP0567580B1 (fr) | 1994-10-12 |
DE69200525D1 (de) | 1994-11-17 |
WO1992012902A1 (fr) | 1992-08-06 |
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