Use of wood drying kiln

Wood drying kiln in the use of the process generally have the outer crack, internal crack, crack three cases. When stacking, material pile end of every article near the end pressure to align them up and down as far as possible;Seting, wood pile and the end of the wood pile close as far as possible, to prevent the air from the material of the gap between the short circuit, in order to avoid end dry too fast;On board end coating paraffin oil or thick paint, preventing water evaporation from the end;For the crack occurs easily hard broadleaf timber or thick plate, try to use soft drying technology, and pay attention to timely for wet processing, etc.
Common defects in wood drying solutions: (1) the crack (crack) : refers to the outer surface of the sawn timber (usually a string of cutting board section) on the longitudinal cracks occur along the wood ray, it is mainly due to the early stage of the drying surface tensile stress is too large, so the early stage of the drying should try to avoid heat up quickly, control the heating time gradient.(2) the internal crack (honeycombing) : wood inside crack occurred inside the wood, the wood rays burst, such as honeycomb, also called honeycombing.Inside crack, generally in the late dry, prevent way is in the middle of the kiln dried in a timely manner the middle and late processing, to remove surface hardening, for larger thickness of sawn timber, especially hard hard wood, late drying temperature must not be too high.(3) the crack (split or longitudinal crack) : when wood drying kiln, due to the wood end moisture evaporates quickly, especially when the larger the thickness of the wood, are prone to cracking.