Method for producing a decorative object from at least one extruded bead layer

A method for producing a decorative object from at least one layer of an extruded bead of a polymer-based composition, comprising a step of:

• passing a polymer-based composition into an extrusion die from a feed inlet of said extrusion die to an extrusion head from which an extruded bead of said composition comes out, the extrusion bead being deposited on a receiving support by gravitational effect;
• wherein the extrusion head is controlled by control means to follow a continuous trajectory intended to form said decorative object in one layer, said control means controlling a variation in a speed V of movement of the extrusion head on the basis of a variation in the trajectory of the extrusion head by an angle α;
• and
• wherein, at a distance D from a change in angle α, the continuous trajectory of the extrusion head complies with the following equation, for each of the layers forming the decorative object:
• D
• =
• a
• +
• (
• b
• ×
• Vc
• )
• +
• (
• d
• ×
• α
• )
• where a, b, c and d are constants according to the following values:
• a=10.6±10%,
• b=2.76−05±10%,
• c=2.72±10%, and
• d=−0.08±10%,
• where D is expressed in millimeters, V is expressed in millimeters per second, and α is expressed in degrees.