How to use liquid silicone for brick carving

liquid rtv silicone with a certain fluidity is very easy to operate. Adding a curing agent of 2% -3% at room temperature can operate within 30 minutes, and it will form after 2-5 hours. It has the advantages of non deformation, liquid rtv2 silicone rubber acid and alkali resistance, high temperature resistance, and less expansion.

Silicone molds generally have a hardness of ± 2A ° after curing. If the general public needs to make large-scale sculpture handicrafts, the split mold should be split into pieces for mold making. High hardness molds should be used for mold making; Relatively speaking, for replicated patterns and fine molds, such as packaging molds, it is necessary to use soft molds silicone to make the mold. The amount of curing agent added can be determined separately based on the actual requirements of the customer. For those who need a fast drying and quick acceleration period, a little more curing agent is generally added, but the silicone produced by this method will be slightly more brittle. On the contrary, if a mold with better finished products is required, the curing agent must be prepared according to the instructions provided by the manufacturer, and the amount should be controlled within about 5%.

The following Hongtu teaches you how to use liquid silicone in brick carving:
1. The prepared curing agent needs to be shaken evenly for use.
2. A: B=100:2-100:5, this ratio is calculated based on the two components of AB, and the weight is based on the electronic scale result.
After pouring the AB and AB groups into the container, stir evenly with a stirring rod. The bottom of the inner wall of the container should be stirred thoroughly, as it is easy to stick to the bottom until the two are fully mixed.
4. After mixing the silicone and curing agent evenly, perform the vacuum exhaust bubble process. Note that no bubbles are present, indicating that the vacuum extraction is complete. Do not overfill the container when vacuuming

Full, otherwise during vacuum treatment, silicone may easily overflow the container.
When making medium or large brush molds, a layer of gauze or fiberglass cloth is usually applied to protect their growth during the mold making process. However, if
If making a sheet mold, it is better to protect the fiberglass or gypsum outer mold.
6. It is also important to pay attention to the filling process. Silicone filling in molds is commonly referred to as injection molding, which is used for smooth or simple products. It involves enclosing the product or model you want to copy with a rubber or glass plate, pouring the vacuum filled silicone directly onto the product, and then removing the finished product after the silicone has dried. The mold is then formed.
7. Pouring molds also need to pay attention to the hardness used, as molds made with harder points are more likely to not damage the handicrafts inside the mold.