硅胶（Silicagel）

硅胶（Silica gel）
Silica gel mould
The silica gel mold is a special mould glue for making crafts. The characteristic of silica gel is high temperature resistance, corrosion resistance, strong tearing resistance and fine simulation. It is a special mold for making various crafts.
[Edit] silicone mold
The production process of silicone rubber mold mold form simple ah and the choice of line selection is very important, one is for the convenience of modulus, two is the line should be in does not affect the overall effect of the product is three, does not affect the product quality, such as mold line waterscape series products position is too high, sealing mould line when the material, it is prone to cracking products; four is to reduce the flow of operations, such as half open mode. In order to prevent the flow of the mold with silica gel around the wood or wood in a fixed range of rules, open mold board and sludge separated part of the first open, there is no gap with the requirements of sludge mode between sludge, smooth surface. After the above work prepared, then in plaster mold or mold coated with Vaseline or spray release agent, smooth product requirements with a clean cotton cloth with Vaseline evenly on the mold, the mold for 30 minutes to fully absorb the Vaseline, and then a clean cotton cloth to wipe the surface clean and die, the requirements of surface light; and the texture of the products as long as evenly coated with Vaseline can be adjusted according to the formula of the silica gel. The deployment of silica gel should be based on the irregular direction of
stirring, the curing agent and silica gel mixing, minimize air mixed with glue, smooth the best products in a vacuum pumping coated with a first layer of glue, vacuum requires -0.1Mpa to maintain 7-8 seconds. After the silica gel is matched, the mould should be made in time. Glue with trickle way down in the highest part of the mold, make its natural flowing stream, not in place in place with a painting brush, if it is not only filled the entire piece mold silica gel products and also to brush evenly daub. Each product at least three brush layer thickness of each layer of silica gel silica gel for 1mm, in the process of brush silica gel, each layer after curing can brush another layer in the third layer, brush to add a layer of gauze in the second layer to increase the strength of gel. The silica gel part of the mould is controlled at 3-4mm in accordance with the size of the product, and the width is no more than the width of the product is 60 mm. The silica gel began to solidify for 20 minutes. 1, the female die for dry cleaning, smoothing (can be a layer of wax stripping or brushing again release agent) 2 and 500-1000 grams of mold silicone rubber (silicone mold, mold rubber, silicone rubber, silicone) Sheng plastic basin reserve; 3, hardener by weight ratio (usually 1.5-2.5%) weighing after joining the mixing container, stir; 4, depending on the situation (especially the first layer) by adding a certain amount of silica diluent. Until the mixture is uniform, usually 3-5 minutes. 5. mold silicone rubber (silicone mold, mold rubber, silicone rubber, silicone) and hardening agent, the reaction at room temperature, and the release of low molecular alcohol, the alcohol molecules from the colloid in the lower vacuum soak 1-3 minutes. Also can not use the equipment (mainly as the mold operator's experience) 6, multi layer brushing die, should follow the internal, middle and outer curing at the same
time. When the dosage of curing agent is relatively small, the reaction time is longer, the reaction is sufficient, the colloid is good, so the dosage of curing agent is better than inside. When brushing, the first layer (inner layer) will be dried and then brush second layers. The operation time of 30-50 minutes, the removal time of 10-15 hours. Curing time is 24 hours. Pay attention to brushing first, second layers plus the best mold such as cloth, it can greatly improve the service life of the die (but do not use glass fiber cloth, otherwise easy to cause the layer and make the whole die scrap) 7,
three-dimensional perfusion mode, generally 10-15 hours curing as well. 8, soft mold production after he finished making plaster or fiberglass jacket to support silicone soft mode note: 1, line selection: does not affect the appearance of the product position; choose the easy processing in filling the position after the selection of the die itself; easy demoulding position;
Choosing the position that the product is not easy to deform can not increase the dosage of the hardening agent for the production schedule, otherwise it will greatly reduce the service life of the silica gel mould. (2). The common problems encountered in the application of mould silica gel: 1. why does the mold silica gel appear to turn the mold less times? In the process of making the mold, too much silicone oil was added, silicone oil destroyed the molecular weight of silica gel, so the mold will appear a few times less die, not durable and so on. If the small products are more complex patterns of products, with a large hardness of silica gel to mold, there will be a few times the phenomenon of turning the mold, because the silicone will be very hard to break the fragile time, easy to
break. On the contrary, if you build a product and use the hardness of the silica gel to make the mold, the result will be unsatisfactory. Because the silicone is too soft, its tensile strength and tear strength will be reduced, the mold will be deformed, so the number of flip mode will be reduced. Mold glue itself quality is very good, silica gel is not good or bad, only suitable and not suitable. We should use the silica gel which is suitable for the hardness of the product to make the mold, it will not appear this kind of situation. 2. why mould silicon will appear burning phenomenon? As the curing agent of unsaturated resin and resin product with peroxide, when resin reaction will produce large amounts of heat, the general resin curing time is 3 minutes, so after 3 minutes to release as soon as possible, to prevent the silicon mold will not produce the phenomenon of burning mode. 3. the mold silica gel filling mold and the piece mold manufacture method: divides the piece mold or the mold operation method: carries out the vacuum silica gel to brush or the perfusion method carries on the construction. If you do die or mold with brushing, brushing off before you want to copy the product model or a layer of release agent or isolating agent, then the silicone coated on the above products (Note: must coatinguniform) wait for 30 minutes, the surface pasting a layer of gauze or the glass fiber cloth to increase the intensity, and then coated with second layers of silica gel, silica gel and dried, then do the outer mould, the outer mould can use gypsum or resin material. The operation method of filling or perfusion modes: filling or perfusion model, is used to smooth or simple products, will you want to copy the product or model, surrounded by plastic or glass plate, the pumping vacuum silicone directly into the products above, the silica gel drying after molding, out products, mold (Note: on the
forming of the perfusion mould by silica gel hardness of soft to die, this release is relatively easy, does not damage the inside of the silicone rubber mold products), all above is the use and operation of the process of silicone mold. 4. why does the mold silica gel appear dry in the surface phenomenon? The silica gel belongs to condensed silica gel, which is solidified by absorbing moisture in the air. In the process of making silica gel, the water is evaporated and dried, but not transferred into the right amount of water, this phenomenon will appear. Solution: This is not a quality problem, but because there is no control of moisture, enhance the silica gel storage period, long shelf life will appear some phenomenon, as long as when using silica gel, adding 0.05% water, stir it can solve some of the situation. 5. why the mold silicone will appear tension phenomenon? Because customers in the production process of the mould, in order to reduce the viscosity of the silica gel, silica gel and silica gel is easy to operate in a large number of addition of silicone oil, which would make the silica gel become very soft, not pulling resistance, tear strength decreased, the tension variation phenomenon, resulting in the mold is not durable, short service life, turn etc. less number phenomenon. 6. why the oil will appear in the mold? Silicone mold itself is not taking oil, oil is appearing because of adding the composite silicone oil during operation (mixed silicone and white mineral oil), because white mineral oil is not oil chemical products, silicone oil. 7. why mold will produce acid and alkali resistance, anti-aging phenomenon? In the process of making silica gel molds, we recommend that customers do not have any silicone oil, if necessary,
The amount of silicone oil should not exceed 5% - 10%. Because
of the excessive amount of silicone oil will destroy the molecular weight of silica gel, so the mold will produce acid and alkali resistance, aging phenomenon is not resistant. 8. why mold silicone mold out of the surface will appear traces, stripes, not smooth and so on? This phenomenon is due to the fact that the copied product or model has not been polished or polished. Because the model or the product itself is not smooth or perfect, so the product or model to be copied, if not polished or polished, and then a good silicone mold will be unsightly, not smooth enough. There is also a situation is that, when the mold release agent, no uniform brushing will also cause the mold is not smooth. 9. wonderful use of silica gel, do you know? Silicone mold is mainly used for toys and gifts industry, craft gifts industry, furniture decoration industry, character copy, architectural decoration industry, resin handicraft industry, unsaturated resin handicraft industry, plastic toy industry, craft candles?? gift stationery industry, plaster craft gift industry,?? die manufacturing industry, industrial products,? Boli? The simulation of animal and plant products and mould making sculpture, copying Buddhist sculpture crafts and many other industries. Mainly used in toys, gifts and fine pattern for package products, mold, pouring mould products, glass, lighting, candles, figure copy making mould, large products, piece mold, reliefs, statues, craft gift making mold, shoe mold, perfusion model, sand casting. Different use of silica gel mold, specific operations are also different, to achieve what requirements, must be based on a variety of parameters specific operation.。