Process for the production of a can by wall ironing
AssigneeCorus Staal BV
InventorHendrik Bastiaan Ras
Life of this patent
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Abstract
A process for the production of a can comprising a base and a tubular body from sheet metal which is coated on at least one side with a layer of plastic, in which process, firstly, a round disc is produced from the sheet metal, which disc is then deep-drawn into a cup which is coated at least on the outside with the layer of plastic, after which this cup is formed into a can by wall ironing, the wall ironing taking place in a single stroke by moving the cup successively through a plurality of wall-ironing rings, in which process an optionally metal-coated steel sheet is used as the sheet metal, and in which process the entry angle from each of the successive at lest three wall-ironing rings is smaller than that of the preceding ring.
Claims15
Process for the production of a can comprising a base and a tubular body from sheet metal which is coated on at least one side with a layer of plastic, comprising the steps of,
- producing a round disc from the sheet metal,
- deep-drawing the disc into a cup which is coated at least on the outside with the layer of plastic,
- thereafter, forming the cup coated with the layer of plastic into the can by wall ironing, the wall ironing taking place in a single stroke by moving the cup successively through a plurality of wall-ironing rings,
- wherein the sheet metal is selected from the group consisting of steel sheet and metal coated steel sheet, and
- wherein an entry angle (α) for each of the successive wall-ironing rings is smaller than that of the preceding ring.
Dependencies are inferred from the claim text.