| 摘要 |
The process is applied in resin injection transfer moulding, in which a two component thermosetting resin is transferred at low pressure, into a closed mould (15, 16) containing a fibrous reinforcement (17) for the resin, and comprises locating in the mould (15, 16) at least one pair of galvanic cell components (24, 25) adapted to generate an electromotive force when immersed in an electrolyte; injecting the liquid resin into the mould so as to immerse at least a portion of each component of the pair in liquid resin to create a galvanic cell; detecting any electromotive force generated by the galvanic cell; and determining from a change in the electromotive force the operational status of the moulding process, which may comprise the arrival of liquid resin at the location of the cell, to indicate the rate of or completion of mould filling, or the onset of completed polymerisation when the resin ceases to act as an electrolyte. The described galvanic cell components are a copper and a zinc electrode. <IMAGE> |
