Device for polymerising lactams in moulds

A device for polymerizing lactams in molds, comprising:

• a hopper for storing solid lactam;
• a lactam feeding means configured to receive the solid lactam from the hopper, wherein said lactam feeding means comprises a plasticizing screw configured to melt the lactam and simultaneously drive the molten lactam in a dosed manner towards a mixing chamber, the plasticizing screw dosing the molten lactam into the mixing chamber in a continuous way;
• the device further includes:
• a first dosing means for feeding a liquid initiator;
• a second dosing means for feeding a liquid activator;
• wherein said mixing chamber is configured to receive in a dosed manner the lactam, the initiator and the activator, from respectively said lactam feeding means, said first dosing means and said second dosing means, said mixing chamber having three separate inlets for receiving, separately, the lactam, the initiator, and the activator, so as to allow the lactam, the initiator, and the activator respectively to flow into the mixing chamber, coming into contact with one another for the first time at the moment immediately prior to entering a mold located next to the chamber and arranged for the polymerization reaction to take place inside the mold.