FIELD: nozzles for injection of molten plastic materials in machines of simultaneous molding of several plastic pre-molded blanks.
SUBSTANCE: proposed nozzle includes rear central part terminating in flat surface in central zone and external ring-shaped member terminating in respective flat surface in the rear. Flat end surface of central zone is extended backward relative to flat end surface of ring-shaped member. Said member is provided with first circular groove deepening backward; it is made in form of acute angle between external edge of rear part and external edge of ring-shaped member which is provided with second circular groove deepening forward; this groove is made at acute angle inside external front edge of rear part. Two circular grooves are located opposite each other widening in opposite sides. Respective angles reach each other to similar height of nozzle.
EFFECT: enhanced protection at starting from cold state; extended range of application in wide temperature range; saving of material; facilitated procedure.
6 cl, 8 dwg
