apparatus for injection of fluids as , for instance , into a mold for the making of parts out of plastic or the like wherein the apparatus is self - aligning with the opening of the mold , a nozzle being moveable substantially automatically as the injection apparatus is moved into the inlet of the mold . the apparatus further includes a device for injecting a precise volume of such fluid , there being means for quickly and easily disassembling the entire injection apparatus for purposes of cleaning or repair .