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Why does the endurance board crack?

by:UNQ     2021-03-11
u003cbru003eu003cpu003eThe internal stress of the endurance board is formed in the process of extrusion molding and cooling and setting, and the PC endurance board will experience a stress relaxation during the placement or use process where the shape of the PC endurance board is basically unchanged. Part of the elimination can be some internal stress. However, the PC endurance board that only undergoes limited relaxation is difficult to completely eliminate these stresses, and there are stresses in it. If the external stress is not increased during use, local deformation of the surface layer and close to the surface will occur. And from here, it is easy to break (small cracks, cracks). Therefore, we must avoid those incorrect or excessive external stresses during use. u003c/pu003eu003cpu003eu003c/pu003eu003cpu003e1. Transport and storage must be properly lined, packaged, and laid flat, because any slight damage (such as scratches) on the surface of the board will develop into a crack. And do not store the plate and other chemical substances in the same place, because volatiles will cause chemical stress cracking on the surface of the plate.u003c/pu003e 2. No matter what type of processing of the PC endurance plate, the processing tools or tools must not be Any damage to the processed part should be as smooth as possible. Minor damage can also cause severe cracking. u003cpu003e 3. Do not damage or remove the protective film before the installation of the PC endurance board, so as not to scratch the surfaceu003c/pu003e 4. It is never allowed to nail the board directly to the frame, otherwise it will cause high damage due to the expansion of the board. Stress and damage the edge of the perforationu003cpu003e 5. If the curvature of the bent sheet is too small, the mechanical strength and chemical resistance of the sheet will drop sharply. In order to avoid dangerous stress cracking on the exposed side, PC endurance The bending radius of the plate shall not be less than 175 times the thickness of the plate.u003c/pu003eu003cpu003eu003c/pu003eu003cpu003eu003c/pu003eu003c/pu003eu003c/pu003eu003c/pu003eu003c/pu003eu003c/pu003e u003c/pu003eu003c/pu003e
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