Rolled section for the realization of heat exchangers and relevant production method

(19)

(11)

EP 0 819 908 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	09.06.1999 Bulletin 1999/23

(43)	Date of publication A2:
	21.01.1998 Bulletin 1998/04

(21)	Application number: 97111302.2

(22)	Date of filing: 04.07.1997

(51)	International Patent Classification (IPC)⁶: F28F 1/10, B21D 53/04

(84)	Designated Contracting States:
	AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
	Designated Extension States:
	LT LV SI

(30)

Priority:

19.07.1996 IT MI961514

(71)	Applicant: Alcan Alluminio S.p.A.
	20090 Pieve Emanuele (MI) (IT)

(72)	Inventor:
	de Santo, Giuseppe Vimercate (MI) (IT)

(74)	Representative: La Ciura, Salvatore
	Via Francesco Sforza 3 20122 Milano 20122 Milano (IT)

(54)	Rolled section for the realization of heat exchangers and relevant production method

(57) A rolled section (1) for the production of heat exchangers, and in particular for the production of micro-fins (4) to be used in this kind of apparatus, that presents on one or both sides a series of scoring suitable to determine the same number of micro-fins (4) so as to increase the width of the corresponding exchange surface between rolled section and fluid.The process for the production of rolled sections is including the steps of:

rolling a metallic sheet to obtain the required thickness
rolling afterwards the sheet obtained in this way by means of a rolling-mill where at least one of these rolls presents on the surface a series of engraving suitable to engrave the corresponding surface of the rolled section in order to produce said micro-fins, the surface of said roll of the second rolling-mill being worked by means of photogravure techniques.

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