CONTAINER PRODUCTION METHOD

摘要

The objective of the container production method according to the present invention is to form a good-quality container having an annular projection that is subjected to deep drawing at a drawing ratio of 0.4 or more using a thermoplastic resin foam sheet. In the container production method, thermoforming of a thermoplastic resin foam sheet is performed using a female die and a male die, the female die comprising a stationary die having a recess corresponding to the external shape of the container and a movable die arranged at the bottom of the recess, and the male die comprising a projection corresponding to the internal surface of the container. At the time of thermoforming, the tip end of the projection is heated to a higher temperature than the base of the projection and the female die, the thermoplastic resin foam sheet is introduced to the recess by the projection, and vacuuming is performed from the female die side.