China Price of Casting Silicone Rubber for Artificial Stone Mold

casting silicone rubber for artificial stone mold

Applications of casting silicone rubber for artificial stone mold
casting silicone rubber for artificial stone mold can also be also applied to poly resin crafts,PU crafts,PU resin crafts ,gypsum crafts ,unsaturated resin crafts, lighting and candles crafts ,plastic toy , stationery gifts crafts industry, a large statue Buddha, relievo furniture, furniture decorative materials, statues Buddha, artifacts copied, building decoration materials, large-scale cement mold, artificial fossils Factory,Europe component factory, simulation landscapes, animals and plants sculpture, sandstone crafts and so on.

Features of casting silicone rubber for artificial stone mold

Two component silicone rubber is white or red flowing liquid with general hardness of 22-50A°after curing. Molding silicon rubber is a kind elastic silicon rubber mold which features with resistance to deformation, high-temperature, acid-alkali and expansion as well as high reproduction times, good tensile strength ,tear strength and elongation.


Technical datasheet of casting silicone rubber for artificial stone mold

ModelHY-620HY-625HY-630HY-635HY-640ColorWhiteWhiteWhiteWhiteWhiteMixing ratio (%)2-32-32-32-32-3Pot life (mins,under 25ºC)30-4030-4030-4030-4030-40Curing time(hrs,under 25ºC )4-54-54-54-54-5Hardness ( Shore A )20±225±230±235±240±2Tensile-strength (kN/m)3.0±0.34.3±0.53.8±0.54.3±0.53.5±0.5Tear-strength (kN/m)3±211±211±211±211±2Viscosity(After A/B mixed ,mPa.s)17000±400025000±500027000±500027000±500015000±5000Shrinkagerate (%)≤0.3%≤0.3%≤0.3%≤0.3%≤0.3%Elongation(%)400%400%400%200%150%

Operations of casting silicone rubber for artificial stone mold
If the customer wants to make large products and large size molds, the mold should be made of silicone rubber with high hardness. On the contrary, if the mold with fine and precision patterns, it should be made of silicon with low hardness. The amount of the curing agent depends on the actual requirements of the customer. If molds requiring fast drying and demould, more curing agent is needed; contrarily, if molds requiring slower drying and demould, less curing agent is needed.

(Note: our company does not recommend you to add silicone oil. If a special soft
silicon mold or fine detailed and complex patterns products are required, 5%-10%
silicone oil can be added to soften the mold for easy demould.)

Frequently asked questions for casting silicone rubber for artificial stone mold
Why does the silicone rubber mold have few molding times?
adding too much silicone oil which will destroy the molecular of silicone rubber; making the mold for small and fine detailed products with higher hardness silicone rubber which is easy to break; making the mold for large products with soft silicone rubber which will reduce the tensile and tear strength of the mold, and the mold will have deformation. Thus, we should take the proper silicone rubber to make the mold for suitable products.
Operation instructions
Step 1: prepare the original molds
Make sure your original molds perfect. fix it on a board. And fix the original mold on a board , then used four piece of board to enclose the original molds .
Step 2: Take 100 G parts A and add 2G parts B and mix them evenly.
*Notes: Mold making silicon rubber is a kind of flowing liquid ,it contains two parts. Part A is a kind of flowing white liquid and part B is the curing agent or catalyst .Pls follow the step strictly:
1.Weigh the two part exactly by electronic weight..
If not , for example add two much catalyst , the operation time will be too fast to operate ,which will cause inconvinience to operate .
2.Mix part A and part B evenly.
Otherwise the silicon rubber will be partly solidified and this will give birth to difficulties in your final operation. What's more, the finished molds will meet a short life. All of these will cause a waste of silicon rubber.
Step 3: Vacuum pumping
Without exception, this step takes less than 1 minutes. Otherwise, it will cause cross linking reaction, and no more further steps will be available.
Step 4: Pouring casting or Brush operation
*Notes:1. For simple pattern products we suggest use pouring operation way , which will be very easy to operate and demould. Pourable silicone require light viscosity which will be easy to flow smoothly and easy to de-air .
2.For delicate pattern products we suggest use brushing operation way , which can copy the pattern exactly . Brushable silicone require high viscosity which won't be easy to flow away and easy to brush .
3. We sugges to set the silicone mold for another 12 hours after demould before put into large production .
Package
25KG/drum vacuum packing for part A +1kg/ bottle catalyst for part B
200KG/drum packing for part A +1kg/ bottle catalyst for part B
Shelf lifeTwelve(12) months when stored under dry and cool place by original package under 25ºC
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