Frequently Asked Questions about Mold Silicone Use

1. Why does silicone mold turn over less frequently?

Too much silicone oil is added during the mold making process. The silicone oil destroys the molecular weight of the silicone, so the mold will be turned over less frequently and become less durable. If you want to make small products with complex patterns, if you use hard silicone to open the mold, the mold will be turned over less often, because the silicone will become brittle and easy to break when it is too hard. On the contrary, if you build a product and use silicone with low hardness to make the mold, the result will also be unsatisfactory. Because silicone is too soft, its tensile and tear strength will be reduced, and the mold will be deformed, so the number of mold turnovers will be reduced. The quality of the mold glue itself is very good. There is no good or bad silicone, only suitable or unsuitable. We need to use silicone suitable for the hardness of the product to make the mold so that this situation will not occur.

2. Why does the silicone mold burn?

Because unsaturated resins and resin products added with peroxide curing agent will generate a large amount of heat when reacting with the resin. Generally, the resin curing time is 3 minutes, so the mold must be demoulded as soon as possible after 3 minutes to prevent the silicone mold from being damaged. The phenomenon of mold burning occurs.

3. Why does the mold silicone appear to be dry on the surface but not dry on the inside?

Mold silica gel is a condensation type silica gel. It is solidified by absorbing moisture in the air. During the production process of the silica gel, the water is evaporated and the appropriate amount of water is not added. This phenomenon will occur. . Solution: This phenomenon is not a product quality problem, but because the moisture content is not controlled to increase the storage period of the silica gel and the shelf life will be long. As long as you add 0.05% water in an appropriate amount when using silica gel, stir evenly. Some situations can be solved.

4. Why does the mold silicone have poor tension?

Because in the process of making the mold, the customer added a large amount of silicone oil to the silicone in order to reduce the viscosity of the silicone and make the silicone easier to operate. This will make the silicone very soft, resulting in tensile stress and reduced tear strength. The tensile force becomes worse, resulting in the mold being less durable, having a shorter service life, and less frequent mold turning.

5. Why does the mold emit oil?

Mold silicone itself does not emit oil. Oil emitted occurs because compound silicone oil (a complex of silicone oil and white mineral oil) is added during the operation, because white mineral oil is a petrochemical product, not silicone oil.

6. Why is the mold not resistant to acid and alkali and aging?

In the process of making silicone molds, we recommend that customers do not add any silicone oil. If necessary, the amount of silicone oil added should not exceed 5% to 10% at most. Because adding too much silicone oil will destroy the molecular weight of the silicone, the mold will be intolerant to acid and alkali and aging.

7． Why do molds made of silicone have marks, streaks, and roughness on the surface?

This phenomenon occurs because the product or model to be copied has not been sanded or polished. Because in fact the model or product itself is not smooth or perfect enough, if the product or model to be copied has not been polished or polished, no matter how good the silicone mold is, it will not be beautiful and smooth enough. Another situation is that when applying the release agent, if it is not applied evenly, the mold will not be smooth.