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Anonymous users2024-02-16Hard molds can also be made of resin. The operation method of casting liquid silica gel is stirred evenly with the curing agent. The appearance of the mold silicone is a flowing liquid, component A is silica gel, and component B is a curing agent.
Hongfeng silicone is available for sale this kind of liquid silica gel for casting) example: take 100 grams of silica gel and add 2 grams of curing agent (note: silica gel and curing agent must be stirred evenly, if not stirred evenly, the mold will appear a piece has been cured, a piece has not been cured, and the silica gel will appear dry and cured unevenly, which will affect the service life of the silicone mold and the number of mold turning, and even cause the mold to be scrapped.
2. Vacuum bubble treatment: after the silica gel and the curing agent are stirred evenly, the vacuum bubble process is carried out, and the vacuum time should not be too long, under normal circumstances, not more than ten minutes, the vacuum time is too long, the silica gel will be cured immediately, resulting in a cross-linking reaction, so that the silica gel becomes a piece of piece.
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Anonymous users2024-02-15The service life and the number of mold turning times of the silicone mold are relatively much improved, which can save costs and improve efficiency. The production of the outer mold: the general method and material is to surround the mold, with a rubber board or wooden board to enclose, a gypsum to fill the mold cabinet on it, the other using resin brushing, a layer of resin to paste a layer of fiberglass cloth, and then brush and paste, repeatedly two or three layers can complete the mold mold.
The operation method of the filling mold or pouring mold: the filling mold or pouring mold is used for relatively smooth or simple products, there is no mold line to save labor and time, that is, the product or model you want to copy, surrounded by rubber plate or glass plate, the vacuum of silicone directly poured into the product, after the silicone is dried and formed, take out the product, and the mold will be formed (note: the casting mold is generally made of silica gel with soft hardness, so that the demoulding is easier and will not damage the product in the silicone mold).
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Anonymous users2024-02-14The production method of filling mold and slicing mold of casting liquid silica gel and slicing mold operation method of slicing mold or sheet mold: the silicone that has been pumped through the vacuum is constructed by brushing or pouring method. If you are making a sheet mold or slicing 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 to the product (Note:
After waiting for 30 minutes, a layer of gauze or fiberglass cloth is applied to the surface to increase the strength, and then a second layer of silicone such as silicone is applied to dry, and then the outer mold can be made with materials such as plaster or resin. The operation method of the filling mold or filling mold: the filling mold or filling mold is used for relatively smooth or simple products, that is, the product or model you want to copy, surrounded by rubber plate or glass plate, and the vacuum silica gel is poured directly into the product, and after the silica gel is dried and formed, the product is taken out, and the mold is formed (Note:
The pouring mold generally uses silicone with relatively soft hardness to make the mold, so that the demoulding is easier and will not damage the product in the silicone mold), the above is the whole process of the use and operation of the mold silicone.
1. Use a plastic bowl to hold 500g of glue, reinforce the chemical agent at room temperature, and stir well for later use.
2. Lubricate the master mold blank with release agent.
3. The lubricated mother billet is surrounded by wooden strips, and the wooden strips should also be treated with release agent, and the gap in the middle should be 2-100px.
4. Pour the prepared glue slowly along a fixed perfusion point, and from time to time to remove the air inside.
After the minute glue is fully cured, surround it with wooden strips, leaving a 100px gap, and dismantle the log strips.
6. Inject 1000g of gypsum powder into the wooden strip frame after mixing it with water, and fill it until it is full (the wooden strip frame should be divided into two parts with plastic sheets to facilitate mold removal).
After a few minutes, the wooden strips are removed and the mold is completed. Because the model or product itself is actually not smooth or perfect enough, if the product or model to be copied is not polished or polished, no matter how good the mold made of silicone isolated, it will not be beautiful and smooth enough. In another case, when the mold release agent is applied, it will cause the mold to be unsmooth if it is not evenly applied.
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Anonymous users2024-02-13Too much silicone oil is added in the process of making the mold, and the silicone oil destroys the molecular weight of the silica gel, so the mold will have a small number of mold turns and is not durable. If you make a small product with a more complex pattern, use the silicone with high hardness to open the mold, there will be a phenomenon of fewer mold turns, because the silicone will be brittle and easy to break when the silicone is too hard. On the contrary, if you make a large product and use silicone with 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 mold will be deformed, so the number of mold turns will be reduced. The quality of the mold glue itself is very good, and there is no good or bad silicone, only suitable and unsuitable. If we need to use silicone suitable for the hardness of the product to make the mold, this situation will not occur.
Because the unsaturated resin and resin products are added with peroxide curing agent, a large amount of heat will be generated when the resin reacts, and the general resin curing time is 3 minutes, so it is necessary to demold as soon as possible after 3 minutes to prevent the silicone mold from not producing the phenomenon of mold burning.
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Anonymous users2024-02-12The casting liquid silica gel should have good operating performance.
Silicone has better fluidity, low viscosity and easy handling.
The smaller the shrinkage of silicone rubber, the better.
The tensile strength of silicone rubber should be good.
The made silicone mold cannot be deformed.
The hardness of silicone rubber should be suitable for the use of the product.
High temperature resistance, many times of mold turning, the longer the service life, the better, acid and alkali resistance and aging resistance.
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