Abstract: This resin-made container is provided with: a neck portion having a content inlet-outlet portion; a lateral surface portion connected to the neck portion; and a bottom portion that is disposed on the side opposite to the neck portion and that is connected to the lateral surface portion. The resin-made container is produced by a stretch blow molding process. The bottom portion has formed therein a bulge section that protrudes downward in the vertical direction. The bulge section is disposed in an eccentric region, of the bottom portion, positioned outside a region demarcated by perpendicularly projecting an opening plane of the inlet-outlet portion of the neck portion.

Abstract: A blow molding apparatus includes a machine bed, an upper base disposed at intervals in a vertical direction from the machine bed, a transport plate configured to rotate at a height position of the upper base to convey the preform between an injection molding part and a blow molding part, and an elevation mechanism configured to move the transport plate or the upper base up and down in the vertical direction with respect to a mold disposed on the machine bed. A support pillar includes a height adjusting part configured to adjust a stroke of the transport plate or the upper base in the vertical direction with respect to the machine bed.

Abstract: A method for manufacturing a resin container includes: performing injection molding on a resin preform; adjusting a temperature of the preform manufactured in the performing injection molding; and performing blow molding on the temperature-adjusted preform to manufacture the resin container. In the performing injection molding, injection molds are opened after completion of filling and pressure holding of a resin material, and the preform is taken out without being cooled in the injection molds after the completion of filling and pressure holding. In addition, in the adjusting the temperature, a refrigerant is introduced into the preform to cool the preform.

Abstract: A temperature adjustment mold for adjusting a temperature of a preform that is injection-molded, has a bottomed shape, and is made of resin includes one or more adjusting portions that face a part of an outer peripheral surface of a body portion of the preform and locally heat a predetermined portion in a circumferential direction of the preform. The adjusting portion is disposed such that a gap is formed in the circumferential direction, and an attachment position is adjustable in the circumferential direction.

Abstract: A temperature adjustment mold capable of performing local temperature adjustment in an axial direction from the inside of a preform while restricting shrinkage and deformation of the preform, for adjusting a temperature of an injection-molded bottomed resin-made preform includes a rod portion inserted into the preform and extending in the axial direction of the preform. The rod portion includes an annular projection portion that protrudes in a radial direction of the rod portion and contacts an inner peripheral surface of the preform. The rod portion contacts a bottom portion of the preform to restrict shrinkage in the axial direction of the preform. The projection portion restricts shrinkage in a radial direction of the preform, conducts heat between the rod portion and the preform, and adjusts a temperature at a predetermined part in an axial direction of the preform.

Abstract: The present application includes an injection molding step and a stretch blow molding step. The stretch blow molding step is configured to include: a first step in which preliminary blow air is introduced into a preform to stretch the preform in a state in which a stretching rod does not contact the bottom of the preform; a second step which is executed after the first step, and in which the preliminary blow air is introduced into the preform and the stretching rod is moved at a set speed and pressed against the bottom of the preform to stretch the preform; and a third step which is executed after the second step, and in which final blow air is introduced into the preform to stretch the preform.

Abstract: A manufacturing method includes an injection molding process of injection-molding a preform, a temperature adjustment process of temperature-adjusting the preform while cooling the preform, and a blow molding process of blow-molding the temperature-adjusted preform to manufacture a resin container. In the injection molding process, a step portion thicker than at least an engagement groove of a neck portion is formed between the neck portion and a body portion of the preform.

Abstract: There is provided a resin container manufacturing apparatus configured to stretch a preform disposed in a stretch blow molding mold by a stretching rod and stretch the preform by introducing blow air into the preform so as to form a resin container. The resin container manufacturing apparatus includes detection means for detecting an actual position of the stretching rod inserted into the preform, and supply control means for controlling a supply state of the blow air based on a detection result of the detection means.

Abstract: A manufacturing method of a resin container having a light-transmitting region and a non-light-transmitting region extending in an axial direction includes: a first injection molding step of injection-molding a first layer of a preform having a convex portion extending in the axial direction using a first resin material having a light-transmitting property; a second injection molding step of injecting a colored second resin material on a surface side on which the convex portion of the first layer is formed and laminating a colored second layer in a region excluding the convex portion of the first layer while exposing the convex portion in the axial direction; and a blow molding step of blow-molding the preform in a state of having residual heat from injection molding.

Abstract: An injection molding mold including: a flow path through which a molten resin passes; a main body portion including an introduction portion configured to introduce the molten resin into the flow path and a supply portion configured to supply the molten resin from the flow path to a cavity mold; and a plug unit formed with a plug flow path which is a part of the flow path, the plug unit being attachable to the main body portion, in which a prevention portion configured to prevent a pressure loss from occurring when the molten resin passes through the flow path is formed at a portion of the plug flow path where a moving direction of the molten resin changes.

Abstract: In a blow-molding apparatus, a cooling device and a heating device are each driven by being supplied with electricity of a predetermined voltage from a supply power source. The blow-molding apparatus comprises: a monitoring device configured to constantly monitor fluctuation of the predetermined voltage; and an output automatic control mechanism configured to, in a case where the predetermined voltage monitored by the monitoring device fluctuates beyond a normal range, automatically fluctuate an output of at least one of the heating device and the cooling device to keep the output in a certain range, thereby adjusting at least one of the preform temperature and the ambient temperature to fall within a normal temperature range.

Abstract: A blow molding mold in which a holding mechanism is independently provided to a bottom mold and is configured to be capable of gripping a protruding portion provided to a bottom portion of a preform independently of a gate portion, and a rotation mechanism is configured to be capable of rotating the bottom mold, relative to a neck portion of the preform which is in a stationary state held by neck molds, in a state where the protruding portion is gripped by the holding mechanism.

Abstract: A method for manufacturing a resin container, the method including: injection-molding a bottomed preform made of resin; and blow-molding the preform to manufacture a resin container, in which the injection molding includes filling a cavity formed by at least an injection core mold and an injection cavity mold with a molten resin to form the preform, and a first groove that extends from a bottom portion defining portion to a neck portion defining portion is formed in a surface of the body portion defining portion of the injection core mold.

Abstract: A blow molding device is provided in which a preform is injection-molded. The injection-molded preform is temperature-controlled by a temperature adjusting unit, and the temperature-adjusted preform is blow-molded, wherein the temperature adjusting unit has a multistage structure in which an uppermost stage has the highest temperature structure, and the mold surface temperatures of lower stages and other than the uppermost stage are set to be 10° C. or more lower than the glass transition temperature of the preform.

Abstract: A manufacturing apparatus for manufacturing a resin container, the manufacturing apparatus includes an injection molding part, a temperature adjustment part, a blow molding part, a take-out part, and a rotation plate. The temperature adjustment part includes a first temperature adjustment mold into which the preform is inserted, the first temperature adjustment mold being configured to cool the preform from an outer surface of the preform, a second temperature adjustment mold into which the preform is inserted, the second temperature adjustment mold being configured to cool the preform from an inner surface of the preform, and wherein, in the temperature adjustment part, the preform is cooled so that at least the outer surface temperature of the preform is lowered within a temperature range from 10° C. to 50° C. as compared to the outer surface temperature of the preform when the preform is carried into the temperature adjustment part.

Abstract: A mold includes a position adjustment mechanism that receives a shaft portion extending from a cavity mold, which accommodates a preform, and adjusts a position where the cavity mold is held on a plane intersecting an extending direction of the shaft portion. The position adjustment mechanism includes a first member in which a linear cam hole that receives the shaft portion is formed, and a second member that is disposed to overlap the first member in the extending direction of the shaft portion and rotates with respect to the first member along a plane. The second member has an elongated hole that intersects the cam hole in a direction of the plane and positions the shaft portion together with the cam hole. Further, a position where the cam hole and the elongated hole intersect each other moves along a longitudinal direction of the cam hole by rotation of the second member.

Abstract: A method of manufacturing an off-center container includes: stretching a preform made of resin having a bottomed shape with a stretching rod, heating the preform; and blow-molding the off-center container, in which a central axis of a neck portion is displaced from a central axis of a body portion, by introducing a pressurized fluid into the preform disposed in a mold. The container has a flat shape and a dimension in a first direction in a cross section is longer than in a second direction perpendicular to the first direction. In a circumferential cross section of the preform, a thickness of a first region corresponding to a surface extending in the first direction of the container is set to be thicker than a thickness of a second region corresponding to a surface extending in the second direction of the container.

Abstract: A method for manufacturing a resin container includes: injection molding a preform made of a resin and having a body portion and a bottom portion; adjusting a temperature of the preform manufactured in the injection molding; and a blow molding step of blow-molding the preform having the adjusted temperature to manufacture a resin container. In the injection molding, the preform is injection-molded using an injection mold in which a thickness of the bottom portion is 0.7 to 0.85 relative to a thickness of the body portion. Further, in the adjusting the temperature, a coolant is introduced into the preform to cool the bottom portion of the preform.

Abstract: A container mold includes: a split mold that has a mold space defining a shape of a body portion of a container; and a bottom mold that has a bottom mold surface defining a shape of a bottom surface of the container and is movable forward and backward with respect to the split mold. The split mold includes a bottom mold reception portion that is communicated with a bottom portion side of the mold space and receives the bottom mold. When the bottom mold is closed with respect to the split mold, a space between a surface of the bottom mold reception portion facing the bottom mold surface and the bottom mold surface is a space that defines a shape of a structure protruding in a radial direction of the container.

Abstract: In a manufacturing apparatus for manufacturing a resin container which includes an injection molding part configured to injection-mold a preform, a temperature adjustment part configured to adjust a temperature of the preform molded in the injection molding part, and a blow molding part configured to blow-mold the preform whose temperature has been adjusted in the temperature adjustment part, the preform is carried into the temperature adjustment part before an outer surface temperature of the preform molded in the injection molding part becomes higher than an inner surface temperature of the preform molded in the injection molding part, and the preform is cooled to be lowered within a range equal to or higher than 10° C. and equal to or lower than 50° C. in the temperature adjustment part.