Method for producing resin container and temperature control device
A method for manufacturing a resin container includes a first step of accommodating an injection-molded bottomed resin preform in a temperature-adjusted mold and adjusting a temperature of the preform by the mold, a second step of moving the mold by a predetermined amount in an axial direction with respect to the preform by a lifting and lowering device and then stopping the mold, and causing an air ejection part arranged on an upper surface side of the mold to face a portion of the preform to be cooled, a third step of ejecting air from the air ejection part to locally cool the portion to be cooled of the preform positioned in the axial direction, and a blow molding step of blow molding the preform whose temperature has been adjusted through the first to third steps and manufacturing a resin container.
1 . A method for manufacturing a resin container, the method comprising:
A: accommodating an injection-molded bottomed resin preform in a temperature-adjusted mold and adjusting a temperature of the preform by the mold;
B: moving the mold by a predetermined amount in an axial direction with respect to the preform by a lifting and lowering device and then stopping the mold, and causing an air ejector arranged on an upper surface side of the mold to face a portion of the preform to be cooled;
C: ejecting air from the air ejector to locally cool the portion to be cooled of the preform positioned in the axial direction; and
blow molding the preform whose temperature has been adjusted through A-C and manufacturing a resin container.
2 . The method for manufacturing the resin container according to claim 1 , wherein
a plurality of the air ejectors is disposed in a circumferential direction of the preform.
3 . The method for manufacturing the resin container according to claim 1 , wherein
the air ejector is disposed on a plate having an arc-shaped groove along a circumference centered on the preform, and is capable of adjusting a circumferential position with respect to the preform along the groove.
4 . The method for manufacturing the resin container according to claim 1 , further comprising:
injection molding the preform, wherein
A: adjusting a temperature of the preform by the mold and C: locally cooling the preform are performed on the preform containing residual heat from injection molding between the injection molding and the blow molding.
5 . The method for manufacturing the resin container according to claim 1 , wherein
the resin container is a stackable container that is capable of being stacked on another container in a state where a bottom portion of the container is in contact with a shoulder portion of the another container.
6 . An apparatus for manufacturing a resin container that adjusts a temperature of an injection-molded bottomed resin preform before blow molding, the apparatus comprising:
at least a temperature adjusting unit configured to adjusts a temperature of the preform and a blow molding unit configured to blow-mold the preform whose temperature has been adjusted, wherein
the temperature adjusting unit includes
a lifting and lowering device configured to drives a mold for accommodating the preform in an axial direction, and
an air ejector attached to a plate disposed on an upper surface side of the mold,
the plate has an arc-shaped groove along a circumference centered on the preform, and
the air ejector is capable of adjusting a circumferential position with respect to the preform along the groove.