
liquid silicone rubber for mold making
Your message must be between 20 to 2000 characters
Contact NowBasic Specification
operation way | pouring and brushing way |
---|---|
Supply Ability | 8 Ton per Day |
Minimum Order Quantity | Minimum Order Quantity |
color | white |
Application | Tin Cure Silicone Rubber For Resin Casting |
Eco-Friendly | Yes |
Test Report | SGS |
Detail Description
Specifications
Cheap Molding Silicone Rubber:
Low shrinkage;
Favorable tension;
No deformation;
High temperature resistance.
Liquid Silicone Rubber for mold making
Application of Molding Silicone Rubber
Molding Silicone Rubber with favorable hardness, is specially suitable for large crafts mould making and duplication of poly resin crafts in pouring or brushing way, PU crafts, gypsum or plaster, unsaturated resin, lighting and candles crafts, plastic toy, stationery gifts crafts, large statue buddha, furniture decoration, cement, articficial stone, etc.
Advantages of molding silicone rubber with white color: light viscosity, pourable effort, good fluidity, easy-operation, good tension and high tear strength.
Brief features of Liquid Silicone Rubber for mold making :
1. resistance to deformation, high-temperature
2. high reproduction times
3. good tensile strength
4. exceptional fluidity and good operability.
Operation Instruction for Liquid Silicone Rubber for mold making :
Step One:Take 100g of part A and add 2g of part B and mix the silicone rubber and curing agent evenly.
Notes: Moulding silicon rubber is a kind of flowing liquid and it contains two parts. Part A is a kind of white flowing liquid and part B is the curing agent. Remember to 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 moulds will meet a short life. All of these will cause a waste of silicon rubber.
Step Two: vacuum pumping
Without exception, this step takes less than 10 minutes. Otherwise, it will cause cross linking reaction, and no more further steps will be available.
Step Three: Brushing cast & Perfusion Moldingoperation
FAQ of Liquid Silicone Rubber for mold making
1) Why is the silicone rubber mold oily?
Basically, molding silicone rubber doesn\'t contain any oil, so it won\'t be oily. The reasons for the oily molds can be deducted from the below 3 factors:
1. Added white oil, which is the compound of silicone oil and white oil. The white oil is not silicone oil but a kink of petrochemicals;
2. Added too much silicone oil. Normally, we donot advise our customers to add any silicone oil into silicone rubber. If necessary, the ratio must be 5%-10%;
3. Added too much curing agent, this is another reason for oily mold.
Tips:
1. weigh the liquid silicone rubber and curing agent exatly .
2. Stir the liquid silicone rubber and curing agent evenly .
3.we shouldchoose the right hardness to making diffirent size of product mold.
2) How to reduce the shrinkage?
1) Control the addition of catalyst. Usually, more catalyst would be added if you want to cured fast, but still we can adjust the working time and the curing time as you require.
2) Do not remould so fast, and pls let the silicone mold cured completely, which would take about 24 hours, then remould.
3) When you produce the products, pls put the mold flatly, then pour the plaster or other materials into it smoothly. When you do not usually the mold, you should store it flatly, not fold it, and you also can pour the plaster into it and not remould the finished plaster products, leaving it in the mold to keep the mold in original shape.
Technical Datasheets of Liquid Silicone Rubber for mold making for your reference
Model | Color | Mixing ratio (%) | Pot life (mins) |
Demould time ( hrs) |
Hardness ( A0) | Tensile-strength | Tear-strength |
Viscosity (mPas) |
Shrinkage rate (%) |
Elongation (%) |
HongYe625# | white | 100 : 5 | 45-60 | 4-6 | 23-26 | 45kgf/cm2 | ≥ 29kgf/cm | 19500 | ≤0.3% | 450% |
HongYe630# | white | 100 :5 | 30-40 | 3-5 | 29-31 | 49kgf/cm2 | ≥ 33kgf/cm | 27000 | ≤0.3% | 490% |
Dowcorning3481 | white | 100 : 5 | 30-45 | 5-6 | 22-25 | 4.6Mpa | 23kN/m | 25000 | ≤0.5% | 520% |
Bluestar (3325 /585) | white | 100 : 5 | 20-60 | 6-24 | 25-28 | 4.2Mpa | 26kN/m | 35000 | ≤0.7% | 440% |
Wacker®M4503 | white | 100 : 5 | 30-90 | 10-20 | 25 | 5.0(N/mm² | > 20N/mm | 40000 | ≤0.5% | 350% |
SmoothonMoldMax®25 | white | 100 : 5 | 45 | 24 | 25 | 577psi | 130pli | 25000 | 002 in./in. | 375% |
Characteristics of Liquid Silicone Rubber for mold making
Model 630#
Appearance white
Mixing proportion of curing agent (%) 3%
Operating time (mins 25 0C ) 30-45
Curing time(hours 25 0C) 6-8
Hardness (A°) 30±2
Density ( g/cm 3 ) 1.08
Viscosity (mPas -25 0C) 18000±2000
Tensile-strength(kgf /cm2 ) ≥43
Tear-strength (kgf /cm ) ≥29
Elongation-break(%) ≥430
Application(most for resin, gypsum and cement product to make moulds) Most suitable for medium and large sized product by brushing method
Brushing cast:
a. Evenly brush the mixed silicon rubber on the product which is covered with mold spray with a brush or a brush pen.
b.After the cross linking reaction (about 30 minutes), brush a second coat which can increase the tension and tear strength of the mold.
c. Cover a glass cloth on it after another 30 minutes of a second cross linking reaction, and use a brush pen or a brush to avoid any interstices.
d. Cover a third coat.
Operations of external mold:
a. Make a square frame with four pieces of wooden boards or rubber plates, then place the product which is covered with the finished silicon rubber mould in the middle.
b. Slowly and evenly perfuse the gypsum into the square frame. Also you can brush the resin on the product which is covered with the finished silicon rubber mould with a brush or a brush pen. Repeat this process two or three time after the cross link reaction.
Need any help on silicone rubber, please feel free to contact Ms Nancy:
Mob: 86-18938867585
Tel: 86-755-89948019
Skype: nancy19870715
MSN: nancy870715( at ) hotmail( dot)com
Email: hyr (at) dzrl ( dot ) net
Additional Information
Payment Terms | L/C, T/T, Western Union, Paypal |
---|---|
Minimum Order | 200kg |
Lead Time / Delivery Time | 3 Day(s) |
Sample Available | YES |
Delivery Details | within three days after getting your payment |
FOB Port | Shenzhen |
Loading Info | shenzhen port by sea |
Packing Info | 25kg and 200kg per drum |
Target Market(s) | North America, Oceania, Southeast Asia, Eastern Europe, Africa(except Middle East), Hong Kong/ Macao/ Taiwan, Latin America, Japan & Korea, Middle East & South Asia, Mainland China, Western & Southern Europe, Northern Europe, Central & Southern Asia, Middle East |
Related Keywords