METHOD OF PREPLASTICATING INJECTION MOLDING

摘要

A method of a preplasticating injection molding, comprising the steps of sending a molten resin plasticized in a plasticizing chamber to an injection chamber through a passage, metering the molten resin, and stopping the passage and precompressing the molten resin before injection is made by a plunger, wherein the stopping of the passage and the precompression function to achieve the precise metering and charging of resin. The deviation of the plunger form the position of completion of metering is determined after the stopping of the passage or the compression, and the position of metering for the next injection is corrected according to the deviation. Charging is effected on the basis of the plunger position detected at the time of precompression.