Raw material of silicone mould
Release time:
2023-02-21 13:38
Silicone is becoming more and more popular because of its environmental performance, to understand the knowledge of silicone molds, we have to start from the silicone raw materials.
1、Ordinary silica gel is also known as precipitated silica gel
Color: translucent, milky white, light yellow, gray, etc.
Hardness: 30°, 40°, 50°, 60°, 70°, etc., commonly used between 40°-70°.
Density:1.1-1.12g/cm³
Elongation:400%
Uses:It is used more for cell phone keys, miscellaneous parts, conductive rubber and other low-grade silicone products.
Weather glue aka pure silicone
Color:transparent.
Hardness: 30°, 40°, 50°, 60°, 70°, 80°, etc., commonly used between 40°-60°.
Density:1.1-1.12g/c㎡
Elongation:600%-700%
Features:Due to the good transparency of this material, the tensile strength is strong. The cost is high
Use:Silicone tube, protective cover and other high-grade products that need high elasticity.
2、Silicone raw materials can be divided into solid silicone and liquid silicone according to physical properties.
Solid silicone is mainly used for molded products. For example: silicone sleeves, silicone tableware, silicone molds, silicone buttons, etc. Liquid silicone is mainly used for extrusion molding products, such as silicone pacifiers, silicone tubes, etc.
Insulation silicone pad, excellent high temperature resistance, silicone (food grade silicone) can withstand 200 ℃ high temperature and can be used for a long time, the production of raw materials in line with food grade standards, through the FDA food grade testing, tasteless and non-toxic, manufacturers according to the mold production, color, shape can be customized.
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Method of making mold filling and splitting mold of mold silicone
How to make a piece mold or sheet mold: Apply the vacuumed silicone by brush or infusion method. If you are making a piece of mold or a piece of mold with the brush method, brush the product or model you want to copy with a layer of release agent or isolation agent before painting
Because unsaturated resin and resin products with peroxide curing agent after the reaction of resin will generate a lot of heat, the general resin curing time of 3 minutes, so 3 minutes after the mold as soon as possible, in order to prevent the silicone mold will not produce the phenomenon of burning mold.
Why does mold silicone have a low number of mold turnovers?
In the process of making the mold added too much silicone oil, silicone oil destroyed the molecular weight of silica gel, so the mold will appear to turn the mold less times not durable and other phenomena. If it is said to do small products with more complex patterns
The process of making silicone molds
The choice of the form of mold opening and the choice of mold line is very important, one is for the convenience of taking the mold, the second is that the mold line should be selected in a way that does not affect the overall effect of the product, the third is not to affect the quality of the product
Raw material of silicone mould
Silicone is becoming more and more popular because of its environmental performance, to understand the knowledge of silicone molds, we have to start from the silicone raw materials.
Notes on silicone rubber molds
b component is a catalyst, easy to moisture hydrolysis, so the lid should be used after the cover tightly.
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