Why white always appears in the summer, as we all know, the cold air and hot air together, will produce water mist and summer, humid air, in our production of wood foaming process, the mold temperature increased has been not, sometimes can reach 50-70 degrees left and right. And our indoor temperature and temperature of raw materials has been around 30 degrees, the raw material in the mold, the raw material and the mold will have a few degrees of temperature difference. So that we can produce water, and make our products surface problems.
The mold temperature is high, we do effect on the surface of wood products is not good, the mold temperature is too high, the surface hardness will be reduced, the skin will appear thinner or burn the skin (skin burning phenomenon, there is a thin layer of the membrane can be removed from the surface of the product).
We do the production, if observed, will find a problem, why do we do in the summer of products, some white, or not, with white lines of products are generally more material products, the thicker side. General small little white products.
That's because we're doing a big ticket. Materials, the reaction heat is greater, the mold temperature will be higher, the temperature is not so fast down. The higher the mold temperature, the greater the temperature difference between the raw material and the raw material. The greater the possibility of generating water vapor. And our small product because of less material, so the mold temperature is not high, small temperature difference, the possibility of line will be much smaller.
We can do an experiment, the mold within the mold release agent, to die in a few drops of water, and then look at the product to do. Will the white soft, White told everyone a little known.
To increase the temperature of the raw material, to minimize the temperature difference between the mold and the mold temperature.
Lower die temperature
Raw material viscosity is too large, mixed not good.
Mix the improved formula.