| 摘要 |
The invention consists of an ultrasonic device for characterising the flow of resin entering and exiting an injection mould (14) during the phase of impregnation, by said resin, of a preform (16) contained in said injection mould. The device comprises two ultrasonic sensors (21, 22) arranged respectively in the vicinity of the inlet port (23) where the resin enters the injection mould (14) and in the vicinity of the outlet port (24) where the resin exits said mould, each sensor emitting an ultrasonic wave towards the end of the mould in the vicinity of which it is positioned, and receiving the ultrasonic wave reflected by the medium. In a preferred embodiment, the device also comprises means for determining the stabilisation of the flow of resin passing through the mould (14) by means of the signals received by the sensors. The invention also consists of a method implementing the device according to the invention in order to determine the completeness of the operation of impregnating, with resin, a preform (16) positioned in an injection mould (14) into which the resin is introduced. |
