Additive manufacturing machine comprising an extraction system and method of additive manufacturing by using such a machine

A machine for the additive manufacture of a component by complete or partial selective melting of a powder, the machine comprising:

• a working chamber;
• a sleeve having a top opening which opens into the working chamber, and having a vertical central axis;
• a support plate to accept the component in the process of being manufactured;
• a device for actuating the translational movement of the support plate inside the sleeve along the vertical central axis of the sleeve;
• and
• a component extraction system comprising a container comprising at least one bottom opening towards the top opening of the sleeve, the container being mounted with the ability to move in the working chamber with respect to the sleeve between a standby position in which the container is set away from the opening of the sleeve and an operation position in which the bottom opening of the container at least partially coincides with the top opening of the sleeve, the support plate being moved by the actuating device from the sleeve to inside the container in the operation position,
• wherein the component extraction system further comprises at least one closure plate able to move with respect to the container in the working chamber along at least one horizontal axis in order to close the bottom opening of the container, the closure plate being separate from the support plate, and
• wherein the attachment between the support plate and the actuating device is removable.