Device and method for producing a container by stretch blow molding a preform

Abstract

Device and method for producing a container by stretch blow molding a preform - The production device (4) comprises: a stretch rod (14), - a first valve (30) movable between an open and a closed position, - at least one second valve (36) movable between an open and a closed position. The first control device (32) is driven according to a position signal of the stretch rod (14), and the second control device (38) is driven by a time signal based on a predetermined time elapsed from a change of state of the first valve (30) between the closed and open positions. Figure for the abstract: 1

Claims

- placing a preform (1) in the production device (4), - stretch the preform (1) in the axial direction (A) by means of the stretching rod (14), - moving the first valve (30) from the closed position to the open position to place the preform (1) in fluid communication with a fluid source, - moving the second valve (36) from the closed position to the open position to place the preform (1) in fluid communication with another source of fluid, characterized in that the passage of the first valve (30) from the closed position to the open position is triggered by the first control device (32) controlled as a function of the position signal when the stretching rod (14) is in a given position relative to the preform (1) and the passage of the second valve (36) from the closed position to the open position is triggered by the second control device (38) by the time signal after a first predetermined time has elapsed from a change of state of the first valve (30) between the closed position and the open position. 40 38 44

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