Hot Press Plate Deformation Analysis

Hot press plate deformation analysis in the process of produce, after hot press pressure, temperature and pressure of two layer effect, hot platen often present pit, crack, deformation, etc, also can produce temperature uneven phenomenon, and limit the threshold plate showed a panel after sanding, MAO part loose, tabby wrinkle, unequal thickness of layer of the hard faults, has a great impact on the quality of goods.Especially after hot pressing plate deformation, each layer of blank thickness error is larger, some partial thick, when sanding hard layer of sand off, sanding when the board surface sand.To reduce present board face sand, board face rough, soft, as well as the quality problems often must add wool plate thickness and thickness of the surface hardened layer, in order to ensure the smallest sanding allowance, such not only add the goods produce cost, can also lead to uneven density of wool board, food enterprise standard keep on record warping deformation and other quality defects, bring the adjustment of the sanding machine hard together.There is no doubt that the main reason for the thickness error of the wool plate produced by the production line of multi-layer hot pressing machine is caused by the deformation of the hot pressing plate.The deformation of hot pressed plate is mostly regular transverse deformation and longitudinal deformation, which is mainly caused by the following points: 

1. The heating is not uniform, and the temperature rises too fast during preheating, especially in the cold state, it is easier to deform during preheating.

2. Heated by steam, sometimes the steam pipe in the hot pressing plate is not smooth or blocked, and the uneven conduction during heating makes the temperature rise and fall of each part of the hot pressing plate different, resulting in hot pressing deformation;Sometimes the condensate discharge is not smooth and is not easy to control the temperature, which is more likely to lead to the deformation of the hot plate.

3. In the process of production, there is the situation that the plate embryo is missing, the plate embryo is short or the density of individual plate embryo is too low, which makes the pressure concentrate on the thickness gauge and lead to the deformation of hot pressed plate.