For casting mold making, use white liquid mold silicone with a 100:2 ratio of silicone rubber to curing agent. Contact the factory to order: 13662816580, Ms. Chen.

Preparation: Clean the master mold thoroughly and apply a release agent to ensure the surface is free from oil, dust, and other impurities, allowing the silicone to adhere properly. Choose the appropriate mold-making method, such as brushing or pouring, based on requirements, and prepare necessary tools like mixing containers, stirring rods, and a vacuum chamber.

Mixing: Accurately measure the silicone and curing agent according to the product instructions. Typically, the curing ratio for condensation-type mold silicone is 100:2-3, while for addition-type AB silicone, it is 1:12. Pour both into a mixing container and stir quickly to ensure thorough blending of the curing agent and silicone.

Deaeration: Air bubbles may form during mixing and require vacuum deaeration. Place the silicone in a vacuum chamber and evacuate until all bubbles are expelled. Avoid excessive deaeration time to prevent premature curing of the silicone.

Brushing or Pouring: Brushing: For master molds with complex structures, the brushing method is often used. Apply a layer of silicone to the master mold surface, allow it to partially dry, then apply subsequent layers. If needed, embed gauze or fiberglass cloth between layers to enhance mold strength.

Pouring: For master molds with simple shapes and smooth surfaces, the pouring method is suitable. Slowly pour the deaerated silicone into the master mold, ensuring it fills all areas without trapping air bubbles.

Curing: After brushing or pouring, allow the silicone to cure naturally at room temperature. Curing time varies depending on the silicone type and ambient temperature, generally ranging from several hours to dozens of hours. Avoid touching or moving the mold during curing to prevent distortion or loss of precision.

Demolding: Once the silicone has fully cured, carefully remove the mold from the master mold. For brushed molds, first gently peel off the outer gauze or fiberglass cloth, then separate the silicone mold from the master. For poured molds, simply demold by removing the silicone directly.