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Changzhou lexing Drying Equipment Co.,Ltd
Founded in May 2007, specializing in the production of drying grinding, mixing and
granulating equipment
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Analysis of common drying defects during wood drying - Star drying

Update:2017-9-18
Wood cracking
End crack
1, water evaporates too quickly
2. Wood growth stress
3, spiral texture
4, the heating rate is too fast
5, drying temperature is on the high side
Surface crack
1, the surface stress is too large
2, and EMC difference is too big
3, wood temperature difference between inside and outside
4, heating rate is large
5, heating up fast
6, surface hardening occurs
7, produce inverse surface hardening
Internal fissure
1, the stress inside the wood is too large
2, surface cracking, external healing
3, and EMC difference is too big
4, wood temperature difference between inside and outside
5, the benchmark conversion is too fast
6, the latter temperature is too high
7, produce inverse surface hardening
Wood bending
Transverse bending of wood
1, wood loading unreasonable, timber free space.
2, strip specifications are not uniform (thickness)
3, plate sawing unreasonable
4, the growth stress is too large
Wood bending
1, wood stacking unreasonable
2, the growth stress is too large
3, plate sawing unreasonable
4 、 the airflow in the kiln is uneven
Irresistible reasons
1, before the kiln has been bent
2, wood growth environment is special
3, the original external force influence
Wood tile bending
1, wood stacking unreasonable
2, the growth stress is too large
3, plate sawing unreasonable
4, the drying environment is fierce
Irresistible reasons
1, before the kiln has been bent
2, wood itself physical characteristics
For example: Heartwood
Wood distortion
1, wood stacking unreasonable
2, the growth stress is too large
3, the bars are not uniform specifications
4, plate sawing unreasonable
Irresistible reasons
1, before the kiln has been bent
2, wood itself physical characteristics
For example: helical texture
Other drying defects
Uneven drying
1 、 the airflow in the kiln is uneven
2, fan positive and negative wind pressure inequality
3, uneven distribution of air flow
4, wind speed is low or high
5, produce inverse surface hardening
6, the benchmark conversion too fast
7, air diversion is unreasonable
8, poor sealing
9, the bars placed unreasonable
10, tree species specifications are not uniform
11, the growth environment is special
12, the design is unreasonable
Wood mildew
1, before the kiln has appeared mildew phenomenon
2, wood stacking unreasonable
3, the timber environment is bad
4, the bars placed unscientific
5. The strips are not dry
6, the drying process is unscientific
7, over treatment
8, the design is unreasonable
9, wind speed is too low, wind pressure is too small
10, uneven air flow
11 、 the temperature in the kiln is too low
1, the whole kiln uneven
2, uneven single piece
A wet external drying
B left wet right dry
Each C site does not dry
3, the cycle is too long
4, the energy consumption is serious
5, heating speed is slow
6. Water in the kiln
7, the effect of steaming is not obvious
8, can not accurately control temperature and humidity
9, wood color deepened seriously
10, can not accurately measure water content
11, wood mildew
Copyright 2017 Changzhou lexing drying equipment Co., Ltd. Rights Reserved.
Factory address: Zheng Lu Changzhou Tianning District Three River Industrial Park 
Mob: Jinlong 13775125706
      Tel: 0519-88910091 88910706 
      Fax: 0519-88913391 
      苏ICP备07020329号
WeChat: 宇星
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