Supply device for a molding device, molding line and method for controlling said molding line

A supply device for supplying at least one molding device with a polymerizable mixture of at least two reactants that react with one another to form a final polymer material, said supply device comprising:

• a buffer tank designed to receive said polymerizable mixture of at least two reactants that react with one another to form a final polymer material through an inlet of said buffer tank,
• a supply circuit, looped with this buffer tank, for feeding the polymerizable mixture to an inlet of said at least one molding device and comprising, beyond said inlet of the at least one molding device, a return line connected to the inlet of the buffer tank in order to return some of the polymerizable mixture into the buffer tank, said buffer tank being designed to receive said polymerizable mixture from said return line, and
• a filling line for filling said buffer tank, said filling line being connected to said inlet of this buffer tank, being separate from the return line, said buffer tank being designed to receive said polymerizable mixture or at least one of said reactants from said filling line.