A, and molding silicone purposes

Add molding silicone is usually referred to as a two-component RTV silicone molding. Silicone A and B components for mobile liquid, the B component containing platinum catalyst catalyst or other additives, A two-component mixed after curing at room temperature or heating. Can be used in the following aspects:

1. Precision mould, such as metal art, alloy car manufacturing;

2. The epoxy resin, polyester resin, polystyrene, vinyl material such as plastic, paraffin moulding;

3. Bulk cement component, culture stone, concrete products such as mold manufacturing;

4. High precision hand-board model design, rapid prototyping design.

Second, the molding characteristics of silicone

1, without being limited by the thickness of the products, deep sulfide;

Line 2, low shrinkage rate, crosslinking process does not emit low molecular, high precision of the product copy out;

3, it has excellent resistance to chemical corrosion resistance, high temperature resistant, can reach 260 ℃;

4, food grade, avirulent insipidity, through the FDA food certification;

5, high tensile high tearing, rolling over more, out of shape not easily;

6, good liquidity, easy perfusion, as well as room temperature curing and heat curing, easy to operate.

Three, plus molding silicone technology parameters

Type of hardness (A0) viscosity (Mpa) s) tearing (KN/m) stretch (Mpa), elongation (%)

1500 1500 + 5000 2 2 p 500 or higher

1505 5 + 2 for 6000 + 500 4 or 2.5 p. 550

1510 10 + 2 to 6500 + 500 13 3 p 500 or higher

20 + 10000 + 1000 2 1520 acuity 16 3.5 p. 400

1530 to 30 + 20000 + 2000 acuity 18 4.5 p. 350

40-1540 2 22000 22000 + 2000 or 20 4.5 or greater

Note: the parameters in the table colloid viscosity, color, transparency, hardness, etc according to the customer's demand.

Four, plus molding operation method of silica gel

1. Ready for containers and blender or stir bar, example: use two instruments of the same capacity, the part A and part B separately in two component container way equal quantity is good, then pour two A/B glue to the same big stir evenly in the container, mold the silicone appearance is flowing liquid, A component is curing the composition of silica gel, team B is silica gel. (note: A/B two components must be uniform mixing, if there is no uniform mixing, the mould will be A piece of has solidified, A no cure, and even cause mold scrap status).

2. It is best to use silica gel mixture to vacuum vacuum machine, (if not pumping air into vacuum state, is in the process of to glue need to do some modulation slower, in order to reduce the bubble.)

3. Perfusion or coating process: to arrange time bubble of silica gel, pour the silicone in the form of perfusion or besmear to brush in the product above (note: perfusion silicone should pay attention to when injected from the edge to prevent splash everywhere, this can also reduce the phenomenon of the gum produced when bubbles; if the brush model, need to die to clean with soap and water then besmear brushs release agent, will wait for it with the brush after dry vacuum good a layer of a layer of silicone brush on the location of the need, such as the need to hurry up dry can be roasted or baked in the oven lamp).

Five, plus molding silicone matters needing attention

Add silicone molding are: the proportion of 10:1 and 1:1 ratio of two relatively routine, add forming silica gel in use process need to pay attention to: can't contact type used condensation of silica gel, otherwise, the phenomenon of the silica gel don't cure.