Abstract
Pure aluminium and 1.6%Si-Al alloy were cast at 750° or 700°C into a straight narrow channel attached by a small well discribed in Fig.1. The temperature of the flowing metal was measured by applying an electro-magnetic oscillograph connected to thermo-couples of 0.1mm diameter.
The distance between the well and the gate gave influence upon the flow length in the narrow channel, and the relation between the temperature of the running metal and flow length were investigeted and discussed.
The results are concluded as follows;
(1) Decreasing of a partial foward flow length L3 from the well is similar to that of the flow length of a channel started from the well in which casting temperature is lowered till the melting point.
(2) The flow length is extended when the running front which is rather cooled is removed from system.
(3) Running metal of higher temperature cools rapidly if it contacts to that of lower temperature as by chill action. Though they could not be in one uniform temperature.
