Pilot test drying process for Castanopsis hystrix lumber

Key words: 
• forest engineering /
• Castanopsis hystrix /
• lumber /
• drying schedule /
• pilot test /
• process

Abstract: To do Castanopsis hystrix wood drying pilot test，validation of pilot test drying schedule is correct，suitable for Castanopsis hystrix production and application of dry schedule. Forced air circulation for ordinary kiln drying，which is widely used in production，was utilized in a drying experiment of Castanopsis hystrix lumber with a given pilot drying schedule；Then，lumber dryness quality was evaluated according to the national standard （GB/T 6491-1999）. Pilot test results showed that the average final moisture content of Castanopsis hystrix lumber was 7.24%；moisture content for deviation of thickness was 2.37%；the stress index was 4.12%；the average camber parallel to the grain of the wood was 0.17%；the camber perpendicular to the grain was 0.25%；twisting degree was 0.24%；the tile-shaped camber was 2.55%；the longitudinal crack degree was 3.31%；the section shrinkage rate was 5.793%；there was no internal cracking；the time of drying to a moisture content of 12% was 138 h （5.75 d）；and drying speed was 0.31%h-1. Intermediate test drying benchmark was basic correct. Generally，the dryness quality of Castanopsis hystrix lumber was favorable and met the production requirements for wood products.［Ch，1 fig. 4 tab. 11 ref.］