A blow molding device of the invention includes a pair of blow cavity split molds (50A, 50B), a chuck member (80) that chucks a mouth portion (20) and conveys a preform (10A), a blow core mold (70) that includes a tubular portion (71) which surrounds circumferences of the mouth portion and a flange (25) and introduces blow air into the preform, and a pair of projecting members (60A, 60B) which have a halved ring shape and are provided detachably on each upper surface of the pair of blow cavity split molds. Each of the pair of projecting members includes an airtight sealing portion (61) which is in contact with a lower end face of the tubular portion of the blow core mold, and a positioning portion (62) which positions the flange of the preform.

A single-layer hollow container includes: a resin composition that is formed of 60 to 90% by mass of polyolefin, 2 to 35% by mass of meta-xylylene group-containing polyamides, and 5 to 30% by mass of modified polyolefin. The meta-xylylene group-containing polyamides are dispersed insularly in the polyolefin, and in a case where each of a vertical length and a horizontal length of the meta-xylylene group-containing polyamide in an initial state is 1, the vertical length of the meta-xylylene group-containing polyamide in the hollow container ranges from 3.3 to 15.8 and the horizontal length ranges from 0.5 to 2.0.

A temperature adjustment part is configured to stretch a preform by moving a temperature adjustment rod toward a bottom surface portion (lower body portion) side of a body portion by a predetermined distance, after inserting the temperature adjustment rod into the preform to bring the temperature adjustment rod into contact with an inner surface of the body portion of the preform other than a boundary portion between the body portion and a neck portion.

A hollow article 10 is molded in a state where an inner surface of a neck portion 11 including an inner screw portion is held by an inner neck mold 52, and then, the hollow article 10 is demolded from the inner neck mold 52 by inserting an ejection rod 81 into the hollow article 10 to be engaged with an inner surface of the hollow article 10 and rotating the hollow article 10 together with the ejection rod 81.

Disclosed herein, amongst other things, is a container having a printing layer that is printable with exposure to laser light of selected properties.

An injection molding mold including a neck mold forming an outer surface of a neck portion of a hollow article, an injection cavity mold forming an outer surface of a body portion of the hollow article, and an injection core mold forming an inner surface of the hollow article, in which the injection core mold includes an outer core mold forming an inner surface of the neck portion including an inner screw portion and, while rotating along the inner screw portion, being movable along a rotation axis thereof, and an inner core mold forming an inner surface of the body portion of the hollow article having a smaller diameter than that of the neck portion and being linearly movable inside the outer core mold along the rotation axis.

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.

A preform for being blow-molded to than a container is provided herein. The preform comprises a finish portion that includes an opening to an interior of the preform and includes a tamper evidence ledge. The tamper evidence ledge cooperates with a tamper-evident ring portion of a cap to indicate that the cap has not been previously loosened after being installed by the manufacturer. A neck portion is disposed adjacent to the tamper evidence ledge. A tapered portion transitions from a diameter of the neck portion to a smaller diameter of a cylindrical portion. The cylindrical portion comprises an elongate member that culminates in an end cap. Threads disposed on the finish portion are configured to threadably receive the cap. A handling valley is disposed between the tamper evidence ledge and the threads. The handling valley enables gripping fingers to engage with and air-convey the container along a manufacturing assembly.

A blank preform for being blow-molded to form a container is provided herein. The blank preform comprises a cylindrical portion that includes a tapered portion that extends to a finish portion. The finish portion includes an opening to an interior of the preform. The finish portion comprises one or more wall thickness portions for blow-molding any of a tamper evidence ledge, one or more threads, a neck portion, and a handling valley. The handling valley facilitates air-conveying the container along a manufacturing line. The cylindrical portion comprises at least one wall thickness suitable for blow-molding any of a base, a portion of a bell, a sidewall, and a shoulder between the sidewall and the bell. The tapered portion comprises one or more wall thickness portions that are suitable for blow-molding any of a portion of the bell, a blown neck, and a blown support ledge.

A gravity rail system for transferring wide-mouth preforms comprising a first rail configured to support a first portion of the wide-mouth preform, and a second rail proximate the first rail, where the second rail further comprises a body that defines a cavity. The cavity is configured to receive a second portion of the wide-mouth preform. The cavity has an inner surface configured to prevent jamming of the wide-mouth preform as the preform is transferred along the gravity rail.