How to deal with the shrinkage of the original wooden door
Solution 1 First of all to be clear, shrinkage and cracking is different. Shrinkage is the thermal expansion and contraction of the physical properties of wood, mainly in the door to help the door between the core board, with the Department of the expansion joints caused by the expansion of the door core plate to open the paint exposed white; cracking is due to high moisture content, Poor process caused by, is a quality problem. The natural properties of the logs determine its variability, made after the product, a certain degree of contraction is inevitable, as if the bridge, the road should be left with the same shrinkage, the higher the water content of the greater shrinkage, the general wooden structure Basically can not solve the problem. Wooden door for the characteristics of these logs, the source control and process control to grasp the way to solve: 2 source control: wooden doors on the one hand selection of stable performance of imported timber, the use of raw materials are first through the international advanced steam drying, stereotypes technology, And then the second drying treatment, the wood moisture content control between 8% -12%, and then according to the product used in the classification of the region. General hardwood tree drying cycle should be about 25 days, some drying cycle and even up to 40 days -50 days. 3 process control: by improving the production process, the original anti-shrinkage anti-cracking treatment technology, the first to do after the paint assembly, set the shrinkage joints, with the joints to strengthen the strength of taps and so on, and truly anti-shrink, anti-cracking, Solid wood door contraction cracking problems.
Hot expansion and contraction! There is a door core of the edge of the film to break the film back a little better!
Wood drying treatment, production up and down the pier and the door were made separately paint, and then assembled, the assembly left when the expansion of the gap, you can maximize the deformation of the original wooden door caused by cracking! Of course, the original wooden doors do not crack is not deformed is impossible.
