Process for the manufacturing of a tire and machines for the carrying out of the process
AssigneeSedepro
InventorsClaude Debroche, Daniel Laurent
Life of this patent
Estimating the term…
Abstract
The reinforcements for tires are made from a single cord (4) laid by a laying head (3A) which describes a path of any type surrounding the rigid core (2) which constitutes a rigid support on which the tire is progressively built. The path comprises a laying zone during which the laying head (3A) applies a length of cord. Between two successive passes of the laying head (3A), the rigid core (2) turns by an amount corresponding to the laying pitch.
Claims14
A process for the manufacture of a tire having at least one reinforcement formed a single cord (4) wherein successive discrete, cut lengths (40) of cord are deposited on a surface of a rotary driven rigid tire support core, said core defining the shape of the inner surface of the tire and on which all or part of the tire is progressively built, the process comprising:
- feeding by feed means an amount of the cord necessary to form a length (40) of cord for deposit on the core;
- laying discrete, cut lengths (40) of cord on the rotary core utilizing at least one laying head (3A, 3B or 3C) movable in an orbital path surrounding the support core, the said path including a laying zone defined by the cut length (40) of cord deposited on the core, said orbital path taking place in a plane which intersects the axis of rotation of the support along an adjustable angle, cutting said discrete length defining the laying zone, the length of cord being adhered to the surface of the core to which it has been applied;
- imparting a rotary movement to said support core, the angular speed of which depends on the angular speed of the laying head, the laying angle, the number of laying heads and the laying pitch of the cords.
A machine for the manufacture of a tire reinforcement said reinforcement being formed a single cord (4) wherein successive, discrete, cut lengths (40) of said cord are deposited on a rotary driven rigid tire support core, said core defining the shape of the inner surface of a tire and on which all or part of a tire is progressively built, the machine comprising:
- a frame (1),
- a displaceable, rotary driven rigid tire support core (2),
- unwinding means for removing a given amount of cord necessary to cut a discrete length (40),
- at least one laying head movable in an orbital path surrounding the core (2) for laying discrete, cut lengths of cord on the core, the said path including a laying zone defined by the cut length of cord deposited on the core, said path occurring within a plane which intersects the axis of rotation of the core (2) at an adjustable angle, means for cutting said discrete lengths of cord defining the laying zone,
- drive means for the laying head or heads and drive means for rotating the core, the angular speed of the latter depending on the angular speed of drive of the laying head or heads, their number, the said angle, and the laying pitch of the cords.
Dependencies are inferred from the claim text.