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military applications of special high temperature resistant of two-component RTV silicone rubber
military applications of special high temperature resistant of two-component RTV silicone rubber use:
precision casting molds, tire mold, PU foam product, and the candle products, imitation marble products, imitation stone product, food mould, sugar, chocolate mold such as mold, wax, insoles, massage cushion, etc.
military applications of special high temperature resistant of two-component RTV silicone rubber features:
1. Good elasticity,
2. Good air permeability, good insulation
3. Resistance to high and low temperature
4. Ultraviolet light resistance, aging resistance strong
5. Environmental protection, food grade
6. Line indentation is lesser, make the mould deformation
military applications of special high temperature resistant of two-component RTV silicone rubber process:
1, tools and materials to prepare
choose ready for mold silicone products, mold a, electronic said a mixing container, a stirring knife is a tool and the material, etc.
2, mold processing
will die grinding and polishing processing is smooth, then besmear brushs release agent, release agent must besmear to brush evenly ( Release agent can be a detergent, soap and water, vaseline, liquid paraffin, etc. ) After, blow dry or dry with gauze. If do shard die, want to choose good painting line.
note: release agent uneven coating, easy to cause the demoulding, some complex pattern release agent reach of the coating, not parting, module and stick on the mould damage model species.
3, fixed mode of
the model with glue on the board, according to the different way of open mode to process the mold, concrete pouring die, BaoMo, shard mold cavity method.
if the perfusion model:
irrigation mode or perfusion model, is used to compare smooth or simple products, no save work line to save time, would you want to copy product or model, with plastic board or glass, and glue to seal around, in order to avoid a gap filling silica gel, silica gel along the gap flow out.
note: silicone rubber sheet or glass contact place also want to make release agent.
if the shard mode:
the part under the die line with sludge, with flattened FuHua, with the sludge around the tool will be cut off, distance
mode of 1 cm 1. 5 cm is preferred.
4, silica gel ratio of a two-component
according to the dosage of AB glue to match into the dosage of the 1:1, to fully stir well
5, vacuum exhaust bubble processing
after the silicone products and curing agent mix, vacuum exhaust bubble link, vacuumizing time shoulds not be too long, under normal circumstances, not more than ten minutes, vacuum time is too long, the silicone curing immediately, the crosslinking, make the silicone piece by piece, cannot besmear to brush or infusions, thus wasting the silica gel, can only put silica gel in the trash, to take silica gel to do again.
6, mould plastic operation process
general with besmear to brush or filling operations, mainly divides into: perfusion modulus, BaoMo, shard.
a, irrigation or infusion modes of operation:
according to the mode of fixed, and will die after fixed, a vacuum of silica gel directly into the product, after being dry silica gel forming, take out the products, mold is molding the ( Note: perfusion model generally adopts the soft hardness of silica gel to do die, so that parting easier, not damage the inside of the silicone mold products) 。
b, BaoMo or subdivision model operation method:
align time bubble of silica gel, by brushing or perfusion. Pour in the product above ( Note: to replicate before pouring silicone products or model release agent must be hit or isolation agent) 。 Then put the silica gel coating on product, besmear brushs must be uniform, a layer of gauze in firbre cloth paste 30 minutes to increase the strength of the silicone and tension. And coating a layer of silica gel, then a layer of gauze in firbre cloth paste, so after two is ok. Only by doing so, out of the silicone mold service life and mould number relative to improve a lot, can save cost and improve efficiency. If it is a large products, also can stick to the glass fiber cloth, but the glass fiber cloth can't on the floor, because it's hard, mold inside will not smooth. External mold production: general methods and materials is to mold all round, with rubber plate or wood, used a plaster will die ark filled is ok, another way of using resin coating, coating a layer of a layer of glass fiber cloth paste resin, stick, besmear again again repeated two or three layer, can complete the die mould.
note: silicone mold will do later, and then according to the product characteristics determine whether surgery for mould processing, if surgery is indented.
military applications of special high temperature resistant of two-component RTV silicone products rubber note:
because of forming gel reaction, condensation type in used plastic everything again with molding plastic time to clean, so as not to react
before testing is not just to add molding glue in adding color or powder and so on, lest make glue phenomenon curing catalyst reaction
add molding is A two-component glue, part A and part B, part A container used not to part B before was not clean, and vice versa
when A and B material mixed whether 1:1 glue or 10:1 glue, requirements must be strictly in accordance with the ratio of ingredients,
the ratio of inaccurate, hardness change
military applications of special high temperature resistant of two-component RTV silicone rubber product packing:
bottled liquid: AB components combined with 50 kg to 400 kg
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