forming mold 60 after the foam 106 has been introduced between the outer and inner shells fig1 illustrates the details of the foam injection system foam gun nozzle 110 is inserted through opening 112 in the outer shell forming mold this opening extends through support member 66 of the forming mold and also through junction box 122 as shown opening 112 also aligns with opening 80 of outer shell bottom panel 72 the nozzle 110 of the foam gun has a cap 118 preferably made of a suitable plastic material such as teflon two apertures 120 provided in nozzle 110 are oriented at 45 u00b0 angles to the direction of the nozzle 110 to promote dispersion of the foam forming components however any selection of angular orientations may be used depending upon the relative size of the area to be filled during operation the foam gun nozzle 110 is inserted about 3 feet into the space between the shells and foam forming components are introduced the introduction of these components is controlled by a computer control 127 mounted on the molding station frame since the components which form the foam are in a liquid state when introduced but later solidify to a somewhat rigid foam material the foam gun nozzle is partially retracted immediately after introducing the foam forming components and aligns to prevent leakage of the foam through the introduction hole 80 in outer shell plate 72 the novel design of the foam gun nozzle 110 allows the teflon cap 118 to retract into the inner teflon sleeve 121 to substantially prevent leakage of the foam forming components while also allowing nozzle holes 120 to align with the junction box drain 124 in junction box 122 this allows for the removal of excess foam forming components 126.