A method for producing a capacitor, which is provided with a plurality of pipes (5) extending parallel to each other and disposed in a defined grid, the ends of said pipes being held by a base plate, characterized by the following chronologically consecutive steps: providing a pan (1), the base surface of which has a plurality of bores disposed in a defined grid and pipe sockets (2) aligned with the bores, introducing filling pins (3) into the pipe sockets (2), introducing thermoplastic granules into the pan (1), melting the granules in the pan (1), introducing centering pins (4) into the pipe sockets (2) while pushing out the filling pins (3), sliding the pan (1) comprising the molten granules onto the free ends of the pipes (5), cooling the molten granules while forming a base plate receiving the free ends of the pipes (5) in a gas-tight manner, said base plate being made of thermoplastic material, and subsequently pulling the pan (1) and the centering pins (4) off the connection of the base plate and pipes (5).