Finally the rubber is vulcanized cooked.
Process of making rubber sheets.
Calendering is a mechanical process by which either plastic or rubber is pressed into textiles cloth fabric tire cord forming composite sheets.
Sulfur is added and the rubber is heated to about 140 c 280 f in an autoclave a kind of industrial pressure cooker.
This will help eliminate air being trapped under or around your object which is one of the main concerns when making a rubber mold.
When pouring the liquid rubber over your object you want to hold the liquid high above the container and pour it in a thin stream.
Pour the rubber from above the container to avoid air bubbles.
At rubber cal we offer recycled rubber roll and sheets alongside with other natural and synthetic rubber products.
I hope all are watch and unde.
Lines for beginners and how to process rubber sheets and what are the process between rubber tapping and making rubber sheets.
Next the rubber is squashed into shape by rollers a process called calendering or squeezed through specially shaped holes to make hollow tubes a process known as extrusion.
This proves cost effective when you want to produce more material because of the longer lengths that are formed and more production capabilities.