One of the biggest problems facing many small air bubbles form in its constructor is silicone molds. The bubbles in the silicone rubber itself is usually not a big problem. The problem is when air bubbles form on the surface in the form of casting unusable.
There are several methods used to ensure bubble-free silicone forms:
1) special casting techniques
2) The application of compressed air
3) Remove the vacuum> Blowjob
4) pressure to force air into the solution
Special casting technique.
The area, where materials are cast in silicone molds is the most important. E 'therefore important that particular care is given to ensure no bubbles when pouring silicone rubber in the shape of the carton and model. It 'important, not only over the edge of the rubber cast model at once. Start by pouring a small amount of rubber inpress box and begin downloading in various corners of the rubber makes you do all surfaces. This wets the surface of the model with a thin layer of rubber and all the air bubbles is easy to see and beaten with a pen or brush.
You can also apply a brush on the first thin film of rubber on the surface of the model. Select the method that works best for your silicone molds.
If you are satisfied that all air bubbles have been popped, you can paythe rest of the rubber mold in the shape of a. Pour as the venue as a fine spray so high in this pop bubbles in the mixture down the road. The objective of this current in a musty corner of the window and not on top of your template.
The application of compressed air to your silicone forms.
If you have access to an air compressor, you have an effective way of bursting bubbles. Make sure the pressure of 30 bar and a small nozzle tipand wet after the merger reduced the amount of rubber in the first blow box shape on the surface of the model in a manner similar to that of the first method. The first film of rubber should be free of bubbles.
Continue with the rest of the rubber in Method One.
Under a vacuum to remove air from silicone molds
Bubbles are generally the result of air beaten in the rubber during the mixing process. Be sure to stirMixture in a slow and constant action. There is still air in the mixture, however, and this can help with a vacuum chamber is removed.
with a vacuum cleaner to suck all the air bubbles, these vacuum chambers and bring the mixture to the surface, where it can be easily removed. Each vacuum chamber has its own instructions on how to use it, but the following is a guide:
1) Use a large container for mixing. Allow to double if placed inCamera.
2) Mix the two parts A and B in the container and place in the room. Close the chamber and start the vacuum pump.
3) The mixture will begin to climb to the top of the container. All air bubbles in the mixture increase in surface area, l '. As the mixture approaches the top of the container release valve, the mixture will break the vacuum and the pop and fall to the ground and the air bubbles. Do this 2-3 times to ensure that bubbles allbe removed.
4) Release the last time to vacuum and take the mixture from the chamber. Now it is ready for bottling.
The use of a vacuum chamber is usually only possible to set the mold for tires that take a fair amount of time. Some of the silicone rubber faster set quickly, and will not have time to get the air bubbles from the vacuum. Be sure to check the label on the product to use.
With the pressure waveSolution.
This technique is useful for faster adjustment to make rubber molds. It works on the principle of forcing air into a pressure vessel with rubber molding mixture. The air pressure will push down the material and release the air bubbles out.
The pressure vessels are freely available and are generally used by painters to paint. Here's how:
1) Select a box shape that fits in your tank. Also check the settingI know items for your mold making rubber, provided that you have to work.
2) Mix and pour the mold material in the mold box of the model.
3) sealing the pressure vessel and the pressure 60-100psi.
4) Allow the material of the mold, as indicated under pressure in the tank. Most mold rubbers work very well with this technique.
If you still have air bubbles after trying some of these techniques in contact with the vendor for moreTips for using the product.
Stan Alderson
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