VENT-UP PREVENTION DEVICE, PRODUCTION METHOD OF COMPACT, AND MOLDING APPARATUS OF COMPACT

摘要

PROBLEM TO BE SOLVED: To prevent the block of a vent by vent-up of a melting resin in a molding method of resin in which a plasticization cylinder in which the vent discharging a gas composition to the outside is formed is used.SOLUTION: A vent-up prevention device is connected to a vent of a plasticization cylinder in which a vent discharging a gas composition to the outside is formed, and a thermoplastic resin is subjected to plasticization melting therein to be a melting resin, and includes: a vent-up detection mechanism that detects the vent-up of the melting resin; and a pressing mechanism that thrusts back the melting resin performing the vent-up into the plasticization cylinder on the basis of a vent-up detection result from the vent-up detection mechanism.