Method for manufacturing a container from a heated preform

Abstract

Method for forming a container from a heated preform. The method comprises the following steps: - defining two formed zones (20) in a body (16) of the container (1), each formed zone (20) corresponding to a heated zone (32) of a body (28) of the preform (2), - heating the body (28) of the preform (2) by means of at least two heating elements (10), each heating element (10) heating one of the heated zones (32), - deforming the heated preform (2) to form the container (1). The method includes, before the step of heating the body (28) of the preform (2), an adjustment step in which the heating power of each heating element (10) is adjusted according to the amount of material in the formed zone (20) corresponding to the heated zone (32) by each heating element (10). Figure for the abstract: Figure 2

Claims

Demands

1. A method for producing a container (1) by deforming a heated preform (2), the container (1) comprising a body (16) extending along a container axis (A), said method comprising the following steps: - determining at least two formed zones (20) along the container axis (A) in the body (16), said formed zones (20) being made from a different quantity of material, each formed zone (20) of the body (16) of the container (1) corresponding to at least one heated zone (32) of a body (28) of the preform (2), - heating the body (28) of the preform (2) by means of at least two heating elements (10), each heating element (10) heating one of the heated zones (32) of the body (28) of the preform (2), - deforming the heated preform (2) to form the container (1), characterized in this which it includes, before the heating stage of the body (28) of the preform (2),a step of adjusting the heating power of each heating element (10) in which the heating power of each heating element (10) is adjusted according to the amount of material in the formed zone (20) of the body (16) of the container (1) corresponding to the zone heated (32) by each heating element (10).

2. A method according to claim 1, wherein the step of determining the formed zones (20) of the body (16) comprises a step of distributing the material in the formed zones (20) of said body (16) of the container (1), wherein an amount of material to be added in at least one of the formed zones (20) of the body (16) of the container (1) and an amount of material to be removed from at least one other formed zone (20) of the body (16) of the container (1) are defined, the amount of material to be added being substantially equal to the amount of material to be removed.

3. A method of embodiment according to claim 1 or 2, wherein the body (16) of the container (1) comprises at least three formed zones (20), the preform (2) comprising at least three heated zones (32) corresponding to said formed zones (20), each heated zone (32) being heated by at least one heating element (10) of which the heating power is adjusted according to the amount of material in the corresponding formed zone (20).

4. A method of implementation according to claims 2 and 3, wherein the distribution step includes defining a quantity of material to be added in one of the formed zones (20), a first quantity of material to be removed in another of the formed zones (20) and a second quantity of material to be removed in yet another of the formed zones (20), the quantity of material to be added being substantially equal to the sum of the first quantity of material to be removed and the second quantity of material to be removed.

5. A method of implementation according to claim 4, wherein when the first quantity of material to be removed is zero, the quantity of material to be added is substantially equal to the second quantity of material to be removed.

6. A method of embodiment according to any one of claims 3 to 5, wherein at least one of the formed zones (20) corresponds to at least two heated zones (32), the heating powers of the heating elements (10) heating said at least two heated zones (32) being adjusted together according to the quantity of material defined for said corresponding formed zone (20).

7. A method of embodiment according to claim 6, wherein the at least two heated zones (32) corresponding to a formed zone (20) are heated zones (32) adjacent along a preform axis corresponding to the container axis (A).

8. A method of embodiment according to any one of claims 1 to 7, wherein each heating element (10) comprises a plurality of monochromatic or pseudo-monochromatic electromagnetic radiation sources.

9. A method of carrying out according to any one of claims 1 to 8, comprising a step of producing a container blank, the quantity of material in each formed zone (20) being defined according to a measurement of the thickness of a wall of the body (16) of said container blank or a visual observation of said body (16).

10. A method of implementation according to any one of claims 1 to 9, wherein each heated zone (32) of the body (28) of the preform (2) extends over a height, measured along the axis of the container (A), of between 4 mm and 5 mm.

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