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Common problems encountered in the application of mold silica gel

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1. Mold silica gel why there are fewer times of mold turnover?
In the process of making the mold, too much silicone oil is added, and the silicone oil destroys the molecular weight of the silicone, so the mold will appear less times and not durable. If you make small products with complex patterns, use silica gel with high hardness to open the mold, there will be fewer times of turning the mold, because the silicone hard time will be very brittle and easy to break. On the contrary, if you build products and use silica gel with small hardness to make molds, the results will also be unsatisfactory. Because the silica gel is too soft, its tensile and tearing strength will be reduced, and the resulting mold will be deformed, so the number of mold turns will be reduced. Mold glue itself quality is very good, silicone is not good or bad, only suitable and not suitable. This situation will not occur if we use silicone suitable for the hardness of the product to make the mold.


2. Why does the mold silica gel appear to burn the mold?
Because unsaturated resin and resin products add peroxide curing agent, the resin reaction will produce a lot of heat, the general curing time of the resin is 3 minutes, so after 3 minutes to remove the mold as soon as possible, in order to prevent the silicone mold will not produce a burning phenomenon.


3. Why does the mold silica gel appear in the surface dry phenomenon?
Mold silica gel is a condensed silica gel, it is cured by absorbing water in the air, silicone in the process of making, the water is dried, and there is no appropriate amount of water, this phenomenon will occur. Solution: This phenomenon does not belong to the product quality problem, but because there is no control of water, improve the storage period of silica gel, shelf life will appear for a long time, as long as the use of silica gel, add the appropriate amount of 0.05% water, stirring evenly can solve some of the situation.


4. Why does the mold silica gel have the phenomenon of poor tension?
Because the customer in the process of making the mold, in order to reduce the viscosity of the silica gel, so that the silica gel is easy to operate and a large amount of silicone oil is added to the silica gel, which will make the silica gel become very soft, resulting in the phenomenon of tensile resistance, tear strength reduction, tension deterioration, resulting in the mold is not durable, short service life, and the phenomenon of less times of turning the mold.


5. Why does the mold appear oil?
Mold silicone itself is not oil, oil is because in the process of operation added compound silicone oil (silicone oil and white mineral oil complex ligand), because white mineral oil is a petrochemical product, not silicon oil.


6. Why does the mold have no acid and alkali resistance and no aging resistance?
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%. Because the addition of too much silicone oil will destroy the molecular weight of silica gel, the mold made will produce a phenomenon that is not resistant to acid and alkali and aging.

7. Why does the mold made of silica gel have traces, stripes, not smooth and other phenomena on the surface?
This phenomenon occurs when the product or model to be copied has not been polished or polished. Because in fact the model or product itself is not smooth or perfect, so if the product or model to be copied is not polished or polished, the mold made of good silicone will not be beautiful and not smooth enough. There is also a case that when hitting the release agent, the mold is not smooth if it is not painted evenly.

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