23 are in registry by reason of the hinged connection thereof means are provided for releasably clamping the two mold halves in opposed relation by way of exemplary embodiment the clamping means may comprise aligned threaded openings 24 in mold halves 20 and 21 which may be engaged by threaded bolts 25 it will be understood that other releasable clamping means may be used such as friction clamps spring clips and the like preferably a reflective surface indicated at 26 in fig1 and 3 is provided above the heat supply means 13 which may be of stainless steel or other material having a radiant heat reflective surface as shown in fig3 the reflector 26 is so positioned as to reflect heat downwardly into the reservoirs 15 it has been found that provision of a transverse bar or rod indicated at 30 in fig3 and 4 in each chute positioned slightly above and outwardly of each orifice 18 aids in directing the molten wax downwardly and into the orifices channeling of molten wax into each orifice is also promoted by the configuration of ribs 17 as best seen in fig2 to provide side edges of each chute which converge toward each orifice 18 it will further be noted that the inward end of each chute terminates in a sloping surface 16a as shown in fig3 which also insures flow of molten wax toward each orifice 18 the housing sections 11 and 12 may conveniently be formed.