China Tyre Mold Making Silicone Rubber Manufacturer

Tyre mold making silicone rubber

Applications of Tyre mold making silicone rubber
1. tyre molds.
2. Silicone RTV can used for poly resin crafts, PU crafts, PU resin crafts, gypsum crafts, unsaturated resin crafts, lighting and candles crafts, plastic toy, stationery gifts crafts industry,
3. Silicone RTV is applicable for large statue Buddha, relievo furniture, furniture decorative materials, statues Buddha, artifacts copied, building decoration materials, large-scale cement mold,
4. Silicone RTV is intend for artificial fossils Factory, Europe component factory, simulation landscapes, animals and plants sculpture, sandstone crafts and so on.
Features of Tyre mold making silicone rubber
1 Two part of liquid fluid: Liquid white silicone and curing agent.
2 Cure at room-temperature within 4-8 hours, but all performance will act perfectly when it cure within 24 hours.
3 Good fluidity and excellent operation.
4 Good resistance to weather, temperature, aging, acid...
5 Excellent tear strength, comfortable duplication times.
Limitations of Tyre mold making silicone rubber
When the hardness of silicon rubber is lower than 15 shore A, the tension, the tear strength, the ageing resistance, acid and alkali-resistance of silicon rubber will reduce respectively.
When the hardness of silicon rubber is higher than 50 shore A, the tension and the tear strength of silicon rubber will reduce, and the solidified silicon mold will be easily broken.

Brushing cast for Tyre mold making silicone rubber
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. )
During operate of silicone RTV the three impotant thing to pay attention
1. Weigh theliquid silicone rubber and curing agent exatly.
2. Stir theliquid silcone rubber and curing agent evenly.
3. We shouldchoose the right hardness to making diffirent size of product mold.

Product 620E630Appearance
white
TranslucentHardness(shore A)
20±2
30±2Mix ratio(A:B)
100:4
1:1/10:1Tensile strength (MPa)
38Tear-strength (kN/m)
3426Elongation(%)
450581Pot life/working time (mins)
(adjustable)
30-4030-40Curing time/setting time (hrs)
(adjustable)
3-4hrs(25°C)
120-30mins(60°C)3-4hrs(25°C)
120-30mins(60°C)Shrinkage rate (%)0.30.1

Warm tips :

As addition cure silicone is a kind of platinum cure system ,which will be easy to cause uncure problem ,so

Kindly follow the tips below :
*Do not mix with liquid condensation silicone rubber or even the tool which used for condensation silicone
*Do not mix with organic matter which contains N, S, P organics and ionic compound like Sn, As,Hg, Ph,
*Do not add any pigment or powder into the addition cure silicone rubber without any testing to prevent uncure problem
Package
20KG/drum vacuum packing for part A + 20KG/drum vacuum packing for part B
200KG/drum packing for part A +200KG/drum packing for part B
Shelf life
Twelve(12) months when stored under dry and cool place by original package under 25ºC
More information , pls feel free to contact Ms Lisa: