Silicone mold making process

1. Wash and dry the master mold for smoothing (you can apply a layer of release wax or apply a mold release agent)

2. 500-1000 grams of mold silicone rubber (mold silicone, mold glue, silicone rubber, silicone) as a plastic basin spare;

3. three-dimensional perfusion mold, generally 10-15 hours of curing as well.

4. The hardener is weighed according to the weight ratio (generally 2-3%), then added to the container for mixing, and fully stirred;

5. Add a certain amount of silicone rubber thinner depending on the situation (especially the first layer). Until the mixing is uniform, usually 3-5 minutes.

6. multi-layer brushing die, should follow the internal, intermediate and external curing at the same time. When the amount of the curing agent is relatively small, the reaction time is lengthened, the reaction is sufficient, and the colloid is good, so the amount of the curing agent is preferably less in the interior. When the brush is applied, the first layer (the inner layer) is dried and then the second layer is brushed. The operation time is 30-50 minutes, and the demoulding time is 10-15 hours. Curing time is 24 hours. Note that after the first and second layers are applied, it is better to add the mold cloth, which can greatly improve the service life of the silicone mold (but the glass fiber cloth can not be used, otherwise it will easily cause delamination and the whole mold will be scrapped)

7. After the mold silicone rubber is mixed with the curing agent, the reaction is carried out at room temperature, and the low molecular alcohol is released. In order to remove the alcohol molecules from the colloid, it is required to be discharged under a negative pressure for 1-3 minutes. It can also be done without equipment (mainly depending on the molder's operating experience)

8. After the soft silicone mold is finished, it is necessary to make a plaster or fiberglass jacket to support it.

Silicone rubber soft mold Note: 1. Mould line selection: Select the position that does not affect the appearance of the product, select the position that is easy to process after grouting, select the position where the mold itself is easy to demolish, and select the position where the product is not easily deformed; Blindly increase the amount of hardener in order to catch up with the production schedule, otherwise the service life of the silicone rubber mold will be greatly reduced.

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