Plywood (multi layer), this side of the small hole is what happened, please answer in detail!
This is the result of the production process,Multilayer plywood material is sheet logs spokeshave out, when the wood adhesive material grain interfolded, can enhance the hardness, both sides of the sheet is generally a little better, the middle part with broken material together, so there will be in the middle of the splicing gap, cut occurs when the holes.
It is impossible to avoid, when wood production is 4 meters wide, 12 meters long, a large chunk of the (there are 6 meters wide, 24 meters long), pressure after cut into small pieces, if the intermediate transverse piece plate without splicing, the log requires 12 meters a long root, this kind of machine cost and material cost over dozens of times,A good plywood must be the case, but it's not that serious, but it's also one of the best ways to choose a board. Besides, the weight of the board is heavy and the middle board is a little more dense,
In addition the middle sheet for the log surface, this will inevitably have some branches of trees, these are very fragile, when the cutting board is easy to broken material, forming a small pit
This is the result of the three combinations of materials, processes, and equipment.First of all, the materials used are not good materials, most of which are made of many kinds of timber, and the texture is hard and soft. Secondly, there is also the problem of the quality of adhesive used, adhesion or poor sizing, sizing or uneven and so can not be effectively bonded, so at the time of cutting the structure loose and crack. Third, mechanical equipment problems.In short, a good material + reasonable process + advanced equipment, in order to produce good products
