公开(公告)号：US20230228033A1

公开(公告)日：2023-07-20

申请号：US18007679

申请日：2021-06-02

Applicant: Valmet Technologies Oy

Inventor： Marko Loijas ,  Tomi Iisakkila ,  Håkan Sjöström

IPC: D21D1/24

CPC classification number: D21D1/24

Abstract: A blade segment (4, 8) for a refiner (1) for refining fibrous material has first (20) and second (21) end edges opposite one another in a direction of a longitudinal axis (LA) of the blade segment (4, 4a, 4b, 8, 8a, 8b), and first (22) and second (23) side edges which extend between the first end edge and the second end edge. The blade segment has a refining surface (5, 9) with blade bars (26) and grooves (27) therebetween on a front surface (25) of the blade segment (4, 8). At least one side edge (22, 23) has at least two edge portions (31, 33, 35, 41, 43, 45) arranged to deviate from the direction of the longitudinal axis (LA) of the blade segment (4, 4a, 4b, 8; 8a, 8b) and connected by an elbow (32, 34, 42, 44) between each two edge portions (31, 33, 35, 41, 43, 45).

公开(公告)号：US20230220624A1

公开(公告)日：2023-07-13

申请号：US18008625

申请日：2021-06-03

Applicant: Valmet Technologies Oy

Inventor： Marko Loijas ,  Tomi Iisakkila

IPC: D21D1/30

CPC classification number: D21D1/306

Abstract: A blade segment (4, 8) for a refiner (1) for refining fibrous material has a first (20) and a second (21) end edge and a first (22) and a second (23) side edge opposite to the first side edge (22) and a refining surface (5, 9) having blade bars (27, 27a, 27b) and grooves (28, 28a, 28b) therebetween on a front surface (25). At least one opening (14, 15) is on at least at one side edge (22, 23) which extends through the whole thickness of the blade segment body (24). There is at least one feed groove (29) on the refining surface, the feed groove (29) extending from the opening and crossing the blade bars and the blade grooves for feeding the material to be refined across the refining surface. The blade bars (27, 27a, 27b) of the blade segment are interlaced at the feed groove.

公开(公告)号：US20170320063A1

公开(公告)日：2017-11-09

申请号：US15523350

申请日：2015-10-23

Applicant: VALMET TECHNOLOGIES OY

Inventor： Håkan Sjöström ,  Matti Kaarineva ,  Tomi Iisakkila ,  Marko Loijas ,  Marcus Sjölund ,  Karl Lönngren

IPC: B02C7/12 ,  D21D1/30

Abstract: A blade element (12) for a refiner (10, 11) for refining fibrous material comprises an inner edge (13) and an outer edge (14) and first blade bars (18) and first blade grooves (19) therebetween, the first blade bars and the first blade grooves extending toward the outer edge of the blade element. At top surfaces of the first blade bars there are second blade bars (20) and second blade grooves (21) therebetween. At least some of the second blade bars (20) lying on an outer end portion (12b) of the blade element (12) have a width which is larger than a width of second blade bars (20) lying on an inner end portion (12a) of the blade element (12) and/or is increasing in direction toward the outer edge (14) of the blade element (12).

公开(公告)号：US10464068B2

公开(公告)日：2019-11-05

申请号：US15523350

申请日：2015-10-23

Applicant: VALMET TECHNOLOGIES OY

Inventor： Håkan Sjöström ,  Matti Kaarineva ,  Tomi Iisakkila ,  Marko Loijas ,  Marcus Sjölund ,  Karl Lönngren

IPC: B02C17/00 ,  B02C7/12 ,  D21D1/30

Abstract: A blade element (12) for a refiner (10, 11) for refining fibrous material has an inner edge (13) and an outer edge (14) and first blade bars (18) and first blade grooves (19) therebetween, the first blade bars and the first blade grooves extending toward the outer edge of the blade element. At top surfaces of the first blade bars there are second blade bars (20) and second blade grooves (21) therebetween. At least some of the second blade bars (20) lying on an outer end portion (12b) of the blade element (12) have a width which is larger than a width of second blade bars (20) lying on an inner end portion (12a) of the blade element (12) and/or is increasing in direction toward the outer edge (14) of the blade element (12).