Shini SHD - Drying Capacity Insufficient

Shini Group
Technology & Marketing Dept
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Shini/CSC-TM 2013-11 zh-cn Shini product repair manual.doc 1.0 26 (62)
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9.3.5 Drying capacity insufficient
When insufficient dehumidification capacity of the machine, the dewpoint will be
high, you need to replace a larger dehumidifier; you can calculate to test whether
machine dehumidification capacity is inadequate according to the following
formula:
Barrel volume (L)= Plastic consumption (kg/hr) X Drying time (hr) X 1.2 ÷ Plastic
bulk density (kg/L)
Dehumidified air volume (m
3
/hr)= Plastic consumption (kg/hr) X Drying air volume
of plastic(m
3
/kg.hr)
Note: Barrel volume and dehumidified air volume of machine must match the
above two conditions at the same time.
9-1 Raw material parameter table
Raw
material
Drying Temp
(℃)
Bulk Density
(kg/L)
Drying time
(hr)
Drying air
volume
(Nm
3
/kg-hr)
Specific heat
(kcal/kg-℃)
A
BS
80
0.6
2~3
1.8~2.4
0.34
CA
75
0.5
2~3
2.5~3.5
0.5
CAB
75
0.5
2~3
3.0~3.5
0.5
CP
75
0.6
2~3
2.9~3.5
0.6
LCP
150
0.6
4
1.8
0.6
PA
70~80
0.65
3~6
2.4~3.0
0.4
PBT
120~140
0.7
4
1.8~2.4
0.5
PC
120
0.7
2~3
1.8
0.28
PE
90
0.6
1
1.8~2.4
0.55
PEEK
150
0
.6
3~4
1.8
PEI
150
0.6
3~4
1.8
0.6
PEN
170
0.85
5
2.4 ~3.5
0.85
PES
150~180
0.7
4
1.56~2.4
0.7
PET
160~180
0.85
4~6
2.4~3.5
0.5
PETG
60~70
0.6
4~6
2.4
0.6
PI
120~140
0.6
3
1.5~1.8
0.27
PMMA
70~100
0.65
3
2.0 ~2.4
0.65
POM
95~110
0.6
3
1.7~2.4
0.35
PP
90
0.5
1
1.8 ~2.4
0.46
PPO
110~125
0.5
2
1.8~2.1
0.4
PPS
140~150
0.6
3~4
1.8
0.6
PS
80
0.5
1
1.5~1.8
0.28
PSU
120~170
0.65
4
1.8~2.0
0.31
PUR
80~90
0.7
3
2.5~2.8
PVC
70
0.5
1
1.7~2.1
0.2
SAN
80
0.5
2~3
1.7~2.1
0.32
SB
80
0.6
2
1.7~2.1