抄纸机头箱系统及纸层成型部的介绍

43 99
第二十四卷第四期
44
Frequency (Hz) = (mm)
(m/min)/(0.06)
44 turbo foil active foil )
(
(stock jump) 43 ( 0-2) ( 10)
0~3
(J/W)
(
100
印 刷 科 技
)
1) 4)
2) 5)
3)
1) 51-89 mm 4)
Vol. 7, Pulp and Paper Manufacture, TAPPI, Atlanta, 1998
3.
/ / /
4. 0.6-1.0 kg/cm2
5.
(pick-up felt)
106
PRINTING SCIENCE & TECHNOLOGY
PRINTING SCIENCE & TECHNOLOGY
Stock Preparation and Wet End
8, Papermaking Science and Technology, Fapet, 2000 (sealing deckle) 2. 600 mm Hg 6. Thorp, B.A., Paper Machine Operations ,
28
(pressure forming)
27
26
(
(velocity forming)
)
( 5 (wire mark) 28)
(
)
( 29)
26
15-50 mm
3-5 mm
27
(
)
94
印 刷 科 技
(forming fabric) PE (seam)
30
29
(warp)( shute filling)
14
( ( L/b 15
) )
14
(Nelson)
86
印 刷 科 技
(
)
16
(dry line)
15
17
(slice edge bleeds)
16
18
17
18
87
第二十四卷第四期
J/W (jet-to-wire speed ratio ) (trial and errors) J/W 0.9 1.10
7 84
(Escher-Wyss)
8
印 刷 科 技
8 B
A
9
9
10
11
10 ( )
% 2-4 cm 35-50% 6-15 rpm
10
3
5
11 85
第二十四卷第四期
(orifice) (nozzle)
12
(top lip) (apron)
( ) 12 (converging)
13
13
(Allis-Chalmers)
51
52
2. ( )
(Multi-former)
1
1 12.5 22.8 45.7 45.7
(
) 抽吸槽寬度 (mm) 25.4 19.0 15.7 15.7
最大容許壓力差 (cm Hg)
1)
2)
1. ( former ) Bel-Bone
(top-former) Gap-former Sym3)
profile
3 (1) (4) (2) (5)
(LG Industries Ltd.) (3)
5
(KMW) 83
第二十四卷第四期
(perforated roll)
5 6 7
(
)
1950
6 Converflow (Beloit Corp.)
Mardon (multi-tube taped
manifold with recirculation) 8
)
(weft
4
5
31
3
(J/W ratio)
1.01
1.03
32
20~35%
1) 3)
2) 4)
5)
30
95
第二十四卷第四期
33
(Albany Engineered Systems)
31 4
(Huyck Canada Ltd.)
33
(lead blade)
32
(Capital Wire)
1960
(drainage elements)
2)
(wet line)
3)
45
2.
2.0-3.5%
102
印 刷 科 技
1-2
200 mm H2O 3.
8-12%
47 (10 ) (Huyck Corp.)
1200 mm H2O 4. 2-4
1)
48
(20 (Huyck Corp.)
)
2) 3)
4)
(
Bel-Bone former
Sym-former)
(pattern) (skeletal roll)
91
第二十四卷第四期
21
(Parker)
22
Parker
(
(top wire))
21
22
23 1) ( ) ( ) 4) 6) 2) ( 7) 3) ) 5) 8)
92
印 刷 科 技
24 4 25
2% 3%
1.5~1.8%
23
24
25
4 93
第二十四卷第四期
1)
(
)
1 2) (dragged) (rushed)
3)
(
H = V2/2g 1 1 (J/W ) 1) ( H
)
) (
( )
) (streak) 2)
88
印 刷 科 技
2.
3) )
( ) (
4)
-
(
)
5)
120
6)
1.
(
1.
)
2. 89
5 m/min
(
)
第二十四卷第四期
20 1960 ) ( 10 )
/ (
1. roll) roll) 2. ) (side flow valve) (side wall) (wire turning roll) 3. 1 2 (
(breast (couch
19 (forming board) 0.2% (foil) ( ( dry box) wet box)
(stretch roll)
11-14% 20% 3-4 52
4) 5) ( cf/in2)
105
2
第二十四卷第四期
1. -
93 -
(May 26-28, 2004)
53
2. 53 3.
93
(
)
(May 26-28, 2004) 1989
4. G.A. Smook, Handbook for Pulp and Paper 5% Technologists CPPA, 1982 1. 1.6 USGal/100 in 5. Paulapuro, H., Papermaking Part 1, , Book , p. 208-261, TAPPI &
(guide roll)
19 90
)
印 刷 科 技
B A D U S
A. B. C. D. E. F. G. H. J. K. L. M. N. P. 20
C
E G H T S
R. S. T. U.
L N J R K M P
F
(
400 m/min)
(squirts) (deckles)
(dandy roll)
(table roll) (contoured support)
(lump break roll)
96
印 刷 科 技
(deflector)
34
(hydrofoil)
35
(activity)
36 Unfoil (Albany Engineered Systems)
34 1.5-4 35
36 1950
3 3)
2)
6) 7)
Gap-former wire Top-wire
Twin-
(
)
(
3-5%)
(
) Gap-former
45 Sym-
former
45
(
) 101
第二十四卷第四期
46
46
(
)
(dp)
dp 1. Top-Former 1.2- 3.0%
1)
Top-former (
2 LWC) 250 mm H2O
200 mm H2O
49 (Huyck Corp.) 103
第二十四卷第四期
( )
(wet box) (flat box) (dry box)
(singlechamber)
50 (Beloit Corp.)
(multi-chamber)
2-4
20 47 48
49 5 cm
51 104
50
印 刷 科 技
第二十四卷第四期
V h g (pipeline flow) (ft/s) (ft) (32 ft/s2)
(
)
1 1) 2) 3) 5) 4)
(1)
1)
2) 4)
3)
(
)
(
)
V
82
2gh
(1)
1
印 刷 科 技
(throat) 2 (reception chamber) 3 4