发明名称 |
WEB-FORMING SECTION AND METHOD FOR MANUFACTURING MULTI-LAYER WEB |
摘要 |
A web-forming section of a paper or board machine comprises a first web-forming unit in which a first fibre layer (W<SUB>1</SUB>) is formed on a first wire (10), a second web-forming unit in which a second fibre layer (W<SUB>2</SUB>) is formed on a second wire (30), and a couch shoe (39) over a curved deck (40) of which the fibre layers (W<SUB>1</SUB>, W<SUB>2</SUB>) are guided for joining them together. The second fibre layer (W<SUB>2</SUB>) is brought to the couch shoe (39) at an angle (a) of less than 20°, advantageously less than 15° in relation to the approach direction of the first fibre layer (W<SUB>1</SUB>). The couch shoe (39) is provided with underpressure and the radius of curvature of its deck (40) is usually larger than the radius of curvature of a guide roll (38) preceding it. By means of the couch shoe, the fibre layers can be joined together wetter than usual. |
申请公布号 |
WO2007048877(A2) |
申请公布日期 |
2007.05.03 |
申请号 |
WO2006FI50459 |
申请日期 |
2006.10.25 |
申请人 |
METSO PAPER, INC.;MOILANEN, PASI;AULA, JOUKO;HARDEN, PETER |
发明人 |
AULA, JOUKO;HARDEN, PETER;MOILANEN, PEKKA |
分类号 |
D21F9/00;D21F11/04 |
主分类号 |
D21F9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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