Machine and method for removing beads from tires at the end of life

A method for extracting an cord made of metal material from a first sidewall of a tire, said cord defining the support structure of the tire, comprising the steps of:

• disposing said first sidewall of the tire in a manner resting against a tire support in a pre-established position;
• prearranging a hook for extracting the cord;
• disposing the hook in an engagement position for engagement with the first sidewall of said tire and gripping the internal surface of said first sidewall;
• moving the hook in an extraction direction from the engagement position to a disengagement position to extract the cord from the first sidewall,
• prearranging a movable element for removing the cord from the hook;
• rotating said movable element, when the hook is in said position for disengagement and extraction, from a rest position to an operating position in order to come into contact with the cord coupled to said hook and to remove the cord from the hook.

A machine for extracting an cord made of metal material from a first sidewall of a tire, said cord being part of the first sidewall and defining a support structure of said tire, said machine comprising:

• a frame;
• a tire support for the first sidewall;
• a hook for extracting said cord from the first sidewall of the tire;
• a hook actuator for manipulating said hook, said hook actuator being configured to manipulate the hook with respect to the frame in an extraction direction between an engagement position for engagement with said first sidewall and a disengagement position for disengagement from said first sidewall to extract said cord from the first sidewall;
• a clamping device for clamping the first sidewall against a supporting plate of said tire support and wherein said clamping device includes one or more clamping elements that are able to move between a releasing position and a clamping position in which the one or more clamping elements act on the surface of said first sidewall in order to clamp it against the plate;
• and
• a cord detachment element and a cord detachment actuator configured to rotate the cord detachment element in a direction of rotation from a first position to a second position in order to detach the cord from the hook when the hook is in said disengagement position.

A method for extracting an cord made of metal material from a first sidewall of a tire, said cord defining the support structure of the tire, comprising:

• separating said first sidewall from the cap of the tire;
• disposing said first sidewall of the tire in a manner resting against a tire support in a pre-established position;
• prearranging a hook for extracting the cord;
• disposing the hook in an engagement position for engagement with the first sidewall of said tire and gripping the internal surface of said first sidewall;
• moving the hook in an extraction direction from the engagement position to a disengagement position for disengagement and extracting the cord from the first sidewall,
• clamping the first sidewall against a supporting plate of said tire support prior to the hook being moved from the engagement position to the disengagement position;
• releasing the first sidewall following extraction of the cord by the hook;
• and
• actuating a cord detachment actuator to rotate a cord detachment element in a direction of rotation from a first position to a second position to detach the cord from the hook when the hook is in the disengagement position.