and valving circuit for the process control referring now to the drawings and more particularly to fig1 and 2 reference numeral 10 represents the completed part e g the dynamite tube tube 10 is externally threaded at 11 and includes rectangular reinforcing type corrugations along most of the length thereof the upper tube end is internally threaded at 13 a cut out 14 permits wiring to be internally directed to the dynamite itself finally the blow out extent described in more detail later is shown by the numeral 15 as being located within the dimpled recess 16 the mold 17 used in the subject process is shown in fig3 and 4 as is conventional mold 17 is divided into two halves 17a and 17b which conventionally operate to pneumatically separate to accept the hollow plastic closed during the actual molding and then again open for the part removal suitable heating and cooling conduits within the mold permit the mold halves 17a and 17b to be alternately heated and cooled during the molding process as suggested above the plastic material is processed in a conventional manner and enters the upper mold in a hollow semi molten state with mold halves 17a and 17b separated the halves then close on the plastic and compressed air is introduced under sufficient pressure to force the plastic firmly against the now closed mold wall as shown in fig3 and 4 an air blow out nozzle 18 is located near the bottom of mold 17 in half 17a the inner end portion of nozzle 18 is rounded convexly at 18a with a center bore 18b extending the length thereof it should be noted that the inner end 18a is actually located interiorly of the inner.