Insufficient or uneven foam volume is usually due to the addition of an insufficient or unevenly distributed expansion dose, inadequate mixing and other reasons. There are many reasons for this, including improper manual operation, equipment problems, and a problem with raw materials. The causes and solutions to these problems will be described below as examples:
1.An inflating agent is a vital raw material to expand foam and form air holes. Foam volume will be insufficient or uneven if added insufficiently or unevenly. The solution is to adjust the expansion dose. But it should be noted that too much expansion agent can also lead to foam rupture and other problems. Therefore, it is important to control the amount of expansion agent.
2.Insufficient mixing also leads to uneven foam volume. To solve this problem, auxiliary equipment such as mixers can be used to ensure raw materials are mixed. Also, adequate mixing and stirring is required before filling the mold to ensure that each part of the material is evenly mixed.
3.Temperature and humidity are also very significant for foam uniformity. If the temperature is too low or the humidity is too high, it will affect the effect of the expansion agent. This will also make the foam volume insufficient or uneven. Therefore, it is necessary to control the temperature and humidity, and adjust the appropriate temperature and humidity conditions according to different climatic conditions and the type of foam.
4.In addition, the foaming and filling process is very critical. If the filling mold pressure is not uniform, it will also lead to insufficient or uneven foam volume. Therefore, sufficient mixing and stirring is needed before pouring into the mold. This is to ensure that each part of the material is evenly mixed and that the filling mold pressure is uniform.
Finally, to avoid insufficient or insufficient foaming volume, it is also necessary to strengthen quality control, and control raw material quality, equipment management and the foaming process. This is to ensure that the production process meets the standard. Check the foam quality to avoid uneven hardness, deformation and other problems caused by inadequate or uneven foaming.