Raw material resin feeding system for a molding machine.

摘要

A raw material resin feeding system for a molding machine available in an injection molding machine or an extruder, of the type that upon carrying out a variable-color operation by making use of material to be changed in color, raw material resin is intermittently fed to a feed section by intermittently opening and closing a resin passageway, is improved. The improvements reside in that the system comprises raw material resin feed selection means (21) provided in the midway of a resin passageway for selecting either one of "intermittent feed of a particular amount" and "continuously feed" with respect to feeding of raw material resin to a feed section, color-change resin feed start detector means (30) for detecting completion of discharge of the amount of raw material corresponding to the particular amount, and color-change completion detector means (50), whereby raw material feed for quick color-change or raw material feed for normal operation can be selectively carried out.