Injection molding method of an injection molding machine

Abstract

When molding is carried out by injecting and charging a measured resin into a mold by a pushing-out member, a measured value of a stroke length of the pushing-out member is calculated and set in advance when the pushing-out member is advanced up to the maximum forward position. The stroke of the pushing-out member is measured from the maximum forward position based on the measured value at a time of a measuring. The pushing-out member is advanced from a measuring completion position to the maximum forward position and then the injecting is carried out. Accordingly, a pressure retaining process becomes unnecessary for reserving a cushion amount and controlling a pressure, and also the resin is charged into the mold based on an always constant molten time. Therefore, a molding product can be made uniform.

Dependencies are inferred from the claim text.