(19)
(11) EP 2 363 218 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.11.2016 Bulletin 2016/48

(43) Date of publication A2:
07.09.2011 Bulletin 2011/36

(21) Application number: 11156338.3

(22) Date of filing: 01.03.2011
(51) International Patent Classification (IPC): 
B21D 22/02(2006.01)
 B63H 5/16(2006.01)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30) Priority: 05.03.2010 FI 20105217

(71) Applicant: Tevo Oy
92160 Saloinen (FI)

(72) Inventors:
  • Hirsikorpi, Risto
    92430, Paavola (FI)
  • Joensuu, Teuvo
    92160, Saloinen (FI)

(74) Representative: Kolster Oy Ab 
Iso Roobertinkatu 23 PO Box 148
00121 Helsinki
00121 Helsinki (FI)

   


(54) Method and apparatus for manufacturing propeller nozzle ring


(57) A method and apparatus is disclosed for manufacturing a propeller nozzle ring (230), the method comprising forming a circular mould (220) having a side profile (222) that widens towards one end (226) of the mould (220), the mould (220) being arrangeable to the neck of an end (204) of a cylinder (200) so that a first end (224) of the mould (220) is towards the interior of the cylinder (200) and a second end (226) of the mould (220) has a cross-sectional surface greater than the end (204) in question of the cylinder (200); and forcing the mould (220) into the cylinder (200) for a predetermined distance so that the outer surface of the side profile (222) of the mould (220) runs against the inner surface of the cylinder (200) and thereby widens at least part of the cylinder (200) to match the widening shape of the side profile (222) of the mould (220), the cylinder (200) thus reaching the shape of the nozzle ring (230).







Search report









Search report