100 - 40,000 kilogram
40,001 - 999,999 kilogram
group nameRTV-2 silicone rubber for molds making
Min Order100 kilogram
brand nameHong Ye silicone rubber
modelRTV 63, RTV638 Casting Resin RTV Silicone Rubber
payment methodT/T, L/C, Westem Union
update timeTue, 05 Nov 2013 12:38:36 GMT
Appearance Liquid
Application Mold making silicone rubber
H.S. code 39100000
Color white/off-white/red/yellow/blue
Shelf life 12 months
Purity 100%
Cataly 4% for free
Molding method Pouring / brushing
MOQ 100kgs
Sample Free
Min Order100 kilogram
Casting Resin RTV Silicone Rubber
Application of casting resin RTV silicone rubber
Casting resin RTV silicone rubber is a kind of silicone rubber which used to make moulds for resin products.
Datasheet of Casting Resin Silicone Rubber
Model | RTV630 |
Appearance | white |
Mixing Ratio (%) | 5% |
Operating time (mins 25 0C ) | 30~50 |
Curing time(hours 25 0C) | 3~5 |
Hardness (A°) | 26~30 |
Density ( g/cm 3 ) | 1.08 |
Viscosity (Mpas -25 0C) | 24000±3000 |
Tensile-strength(kgf /cm2 ) | ≥40 |
Tear-strength (kgf /cm ) | ≥25 |
Elongation-break(%) | ≥ 420 |
Retractility(%) | ≤0.3 |
Model | RTV638 |
Appearance | white |
Mixing proportion of curing agent (%) | 3~4% |
Operating time (mins 25 0C ) | 30-50 |
Curing time(hours 25 0C) | 3-6 |
Hardness (A°) | 32~35 |
Density ( g/cm 3 ) | 1.08 |
Viscosity (mPas -25 0C) | 19000~24000 |
Tensile-strength(kgf /cm2 ) | ≥42 |
Tear-strength (kgf /cm ) | ≥23 |
Elongation-break(%) | ≥ 430 |
Retractility(%) | ≤0.25 |
Feartures of casting resin RTV silicone rubber
1. High temperature-resistance, won't getting burned out.
2. Good characteristics of easy-operation
3. Light viscosity and good flowability
4. Low shrinkage
5. Favorable tension
6. No deformation
7. Favorable hardness
7. High temperature resistance, acid and alkali-resistance and ageing resistance
Moulding method for RTV630:
RTV630 is suitable for making moulds for small or medium size resin moulding/casting by pouring and brushing method;
RTV638 is suitable for making moulds for large size resin mouldking/casting by brushing method.
Casting resin process by silicone rubber:
Step One: prepare the original molds: you must 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 Two: Take 100g of part A and add 2g of part B and mix the silicone rubber and curing agent evenly.
Notes: Molding 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 molds will meet a short life. All of these will cause a waste of silicon rubber.
Step Three: 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 Four: Pouring casting or brushing casting
-------Pouring casting
It is suitable for simple products with the smooth surface.Without any mold lines,which helps you save time and is easy for operation.Evenly and slowly perfuse the mixed silicone rubber into the square frame.After the cross linking reaction and the silicone rubber turns dry,you can take the products out.Thus,the mold has been done.
(Note:we usually use soft silicone rubber to make molds by perfusing,which is easy for demoulding and will not damage the product in the silicone molds.)
-------Brushing casting
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.
(Note: if you have high requirements for the tension and the tear strength for the mold, please repeat step c and step d. Hence, the finished silicone moulds will have a good quality and a longer life, which can help you save cost and increase production efficiency.)
Any questions for casting resin RTV silicone rubber , pls feel free to contact Taylor:
Mob: +86-18938867522
Tel: + 86-755-89948006
Skype: taylordl828
Facebook: hyw(at)szrl(dot)net
网络文化经营许可证:浙ICP备14006100号-11 2007-2024 Tradevv.com. All rights reserved.