Before understanding the maintenance skills of rubber product molds, let us first understand the reasons that cause the scaling of rubber product molds. The scaling is initially caused by zinc sulfide (inorganic deposits) attached to the mold and forms a gray deposit layer; As a function of temperature, low molecular weight components in the mixture will adhere to the zinc sulfide crystallites and cause the second stage of deposition (organic deposition). Oxidation products will be formed within a certain period of time and lead to carbon deposition. After understanding the reasons for the scaling of rubber product molds, some targeted measures can be taken for cleaning and maintenance. Common cleaning methods for rubber products are as follows:
- Ultrasonic descaling, using the principle of frequency and wavelength to remove dirt in the cavity. It works better when used with mold cleaning water. This effect is very good, but the cost is relatively high.
- Mechanical descaling. Now, most rubber product manufacturers are equipped with sandblasting machines that can directly blast the surface of the mold with resin sand. This method has a better cleaning effect and is a more commonly used mold cleaning method.
- Mold electroplating, plating a layer of hard chromium on the surface of the mold. Practice has shown that this method can effectively solve the problem of adhesion of deposits on the surface of the mold. This method is more suitable for mass rubber product molds.
- Chemical cleaning,use professional mold cleaning water or dilute sulfuric acid to directly clean the oxide scale parts. This method is fast and effective, but it will produce a pungent odor during the cleaning process and will also pollute the environment. This method has been gradually eliminated, and some small processing plants are still in use.