Problems with the use of silicone molds

common problem:

1. Why does the silicone mold have a small number of mold overturns?

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 be turned over less frequently and not durable. If it is said that small products with complex patterns are used to open the mold with high hardness silicone rubber, there will be a phenomenon that the number of mold turning is less, because the time when the silicone rubber is too hard will be very brittle and easy to break. On the contrary, if you make a building product and use silicone with a low hardness to make a mold, the result will also be unsatisfactory. Because the silicone is too soft, its tensile force and tear strength will be reduced, and the resulting mold will be deformed, so the number of overturning will be reduced. The quality of the mold glue itself is very good, and the silicone is not good or bad, only suitable and unsuitable. This situation will not occur if we use silicone rubber suitable for the hardness of the product to make the mold. Suconvey Rubber is a China silicone mold factory, Mainly produce ice mold silicone, cake silicone mold, silicone candy molds.

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2. Why does the silicone mold burn?

Because unsaturated resin and resin products are added with peroxide curing agent, they will generate a lot of heat when they react with the resin. Generally, the curing time of resin is 3 minutes, so it is necessary to release the mold as soon as possible after 3 minutes to prevent the silicone mold from not being damaged. The phenomenon of mold burning occurs.

3. The method of filling the mold and the slicing mold of the mold silicone:

Slice mold or sheet mold operation method: Apply the vacuumed silicone rubber to the construction by brushing or pouring. If you are making a piece mold or a piece mold and use the brushing method, first apply a layer of release agent or release agent to the product or model you want to copy before painting, and then apply the silicone on the product (Note. : Be sure to brush evenly) After waiting for 30 minutes, stick a layer of gauze or glass fiber cloth on the surface to increase the strength, and then apply a second layer of silicone rubber, wait for the silicone rubber to dry, then make the outer mold, the outer mold can be used Materials such as gypsum or resin.

The operation method of pouring or pouring mold: pouring or pouring mold is used for relatively smooth or simple products, that is, the product or model you want to copy is surrounded by plastic or glass plates, and the vacuumed silicone Pour it directly onto the product. After the silicone rubber is dried and formed, take out the product and the mold will be formed (Note: The perfusion mold is generally made of silicone rubber with relatively soft hardness, so that the demoulding is easier and will not damage the product in the silicone mold) , the above is the whole process of mold silicone use and operation.

4. Why does the mold silicone appear dry on the surface and not dry on the inside?

Mold silicone rubber is a condensed silicone rubber, which is cured by absorbing moisture in the air. In the process of making silicone rubber, the moisture is evaporated to dryness without adding an appropriate amount of moisture. This phenomenon will occur. . Solution: This phenomenon is not a product quality problem, but because the water is not controlled, the storage period of the silicone rubber is increased, and the shelf life is long, and some phenomena will occur. As long as the silicone rubber is used, an appropriate amount of 0.05% water is added and stirred evenly. Some situations can be resolved.

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5. Why does the mold silicone have poor tension?

In the process of making the mold, in order to reduce the viscosity of the silicone rubber and make the silicone rubber easy to operate, a large amount of silicone oil is added to the silicone rubber, which will make the silicone rubber very soft, resulting in poor tensile strength and reduced tear strength. The phenomenon of poor tensile force, resulting in the phenomenon that the mold is not durable, the service life is short, and the number of mold overturns is small.

6. Why does the mold appear oily?

The mold silicone itself will not emit oil. The oil is caused by the addition of composite silicone oil (complex of silicone oil and white mineral oil) during the operation, because white mineral oil is a petrochemical product, not silicone oil.

7. Why is the mold not resistant to acid and alkali, and not resistant to 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%. Because the addition of too much silicone oil will destroy the molecular weight of the silicone rubber, the resulting mold will not be resistant to acid and alkali, and is not resistant to aging.

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8. Why does the mold made of mold silicone have traces, streaks, unevenness, etc. on the surface?

This phenomenon occurs because the product or model to be reproduced has not been ground or polished. Because the actual model or product itself is not smooth or perfect enough, if the product or model to be copied has not been ground or polished, even the best silicone mold will be unsightly and not smooth enough. Another situation is that when the release agent is applied, the mold will not be smooth if it is not evenly brushed.

9. Do you know the wonderful use of mold silicone?

Mold silicone rubber is mainly used in toy and gift industry, craft gift industry, furniture decoration industry, character reproduction, building decoration industry, resin handicraft industry, unsaturated resin handicraft industry, candle craft, plastic toy industry, gift stationery industry, gypsum Craft gift industry, mold manufacturing industry, Poly industrial products, simulation animal and plant sculpture, Buddha carving crafts and other industries product replication and mold making.

Mainly used in toys, gifts, products with fine patterns, used for molding, pouring mold products, glass crafts, lighting, candles, character reproduction molds, large products, split molds, reliefs, Buddha statues, craft gifts Making molds, sole models, pouring molds, sand casting.

The specific operations of various uses of mold silicone are also different. To achieve what requirements must be operated according to various parameters.

How to clean:

Generally, we use sandblasting for the cleaning of production molds. First, we choose a more suitable cleaning sand (made according to the shape of the silicone product mold), and then import the cleaning sand into the sandblasting machine, and then also produce the silicone products. The mold is placed in the sandblasting machine, and the sandblasting head is used to align the mold cavity of the silicone product production mold, and then the sandblasting treatment is carried out according to the arrangement order of the mold cavity.

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