MELT DISPENSING APPARATUS WITH ADJUSTABLE STOP

摘要

An apparatus for dispensing melted molding material may include a valve stem movable in an opening stroke from a closed non-dispensing position to an open dispensing position and an indexed adjustable stop for adjustably limiting the opening stroke of the valve stem at one of a plurality of discrete limits. An apparatus for dispensing melted molding material from a plurality of valve-gated drops may include a plurality of valve stems, each reciprocable, by a reciprocating member, between an open dispensing position and a closed non-dispensing position. Each valve stem may be biased against the reciprocating member. Each valve stem may have an associated adjustable stop for adjustably limiting a range of motion of the valve stem in the bias direction and thereby setting the open position for the valve stem independently of the closed position for the valve stem and independently of the open position of any other valve stem.