Provided is a manufacturing method for a double container that allows easy manufacturing with a molding device not significantly different from conventional devices and that can, at a lower cost than the processing cost of conventional technology, very easily and reliably form, in a comparatively rigid outer container and in a double container that allows, inside the outer container, capacity to be varied with respect to the amount of content, an opening for allowing external air to enter. When a pair of partial molds are brought near each other in order to form a split mold, at least part of the mating faces of the pair of partial molds forms a projection by sandwiching a small outer diameter portion of a parison, a gap that passes between the double container is created by cutting off the projection, and the gap is opened and expanded by screwing on a cap.

Method for processing hot-filled plastic containers are provided. In some embodiments, the method may include hot-filling a plastic container, sealing the container, and conveying the sealed container, each with an inner annular wall and a push-up portion in a first position. In some embodiments, the method may further include creating a vacuum pressure in the hot-filled and sealed container and repositioning the push-up portion from the first position to a second position under a mechanical force.

An inductively heated mold system enables rapid heating of the mold and rapid cooling to reduce thermal cycling times by employing an inductive coil in a heater module that inductively heats a ferromagnetic layer configured on the mold body, such as around the outside perimeter of the mold body. A cooling channel may be configured between the inductive coil and the ferromagnetic layer on the mold body to allow a fluid to be passed between the mold body and the heater module to rapidly cool the mold body for removal of the molded part. A plurality of heater modules may be employed that can be coupled together such that the cooling fluid passes through the coupled cooling channels from one module to a second module. In this way heater modules can be combined to provide an inductively heated mold system for a variety of mold body sizes, or lengths.

A blow molding assembly includes a die, a mandrel, and a die holder. The die defines an inner wall. The mandrel is disposed at least partially inside the inner wall of the die and defines, with the inner wall of the die, an annular gap that shapes a molten resin passed therethrough, forming a parison. The die holder includes a body and three or more spring-loaded fasteners positioned around an inner perimeter of the body. The spring-loaded fasteners apply pressure to respective positions on an outer surface of the die while permitting movement of the die within a plane that is substantially orthogonal to a longitudinal axis of the mandrel in response to pressure variations of the molten resin, keeping a thickness of the parison substantially even. Each of the spring-loaded fasteners includes a spring-loaded plunger engaging the respective position on the outer surface of the die.

A method for manufacturing a container including: forming a preform by injection molding, the preform having a bottom portion, a body portion, and a finish portion including a top sealing surface, threads, and a support flange; forming the preform such that the top sealing surface is made of a base layer, and such that the body portion and the bottom portion are both made of the base layer and an oxygen barrier layer; and forming the container from the preform by blow molding. The top sealing surface includes only the base layer. The body portion and the bottom portion both include an inner portion made of the base layer, an outer portion made of the base layer, and an oxygen barrier layer between the inner portion and the outer portion.

A preform configured to form a container. The preform includes a finish defining an opening and a top sealing surface configured to contact a closure to seal the opening closed. A body portion extends from the finish. A bottom portion is at an end of the preform opposite to the finish. A longitudinal axis of the preform extends through an axial center of the bottom portion. An oxygen barrier layer extends along the body portion to the bottom portion and across the bottom portion. A base layer includes an outer portion and an inner portion. The oxygen barrier layer is between the outer portion and the inner portion. The oxygen barrier layer extends along the body portion and the bottom portion.

The invention relates to a device and a method for semi-continuous blow moulding of fiber-reinforced, thermoplastic, endless, hollow-profile-shaped components with longitudinally constant or varying cross-sections, consisting of at least one consolidation tool, which, in its closed state, encloses a preform enclosing an elastically moldable pressure chamber.

A preform configured to form a container. The preform includes a finish defining an opening and a top sealing surface configured to contact a closure to seal the opening closed. A body portion extends from the finish. A bottom portion is at an end of the preform opposite to the finish. A longitudinal axis of the preform extends through an axial center of the bottom portion. An oxygen barrier layer extends along the body portion to the bottom portion and across the bottom portion. A base layer includes an outer portion and an inner portion. The oxygen barrier layer is between the outer portion and the inner portion. The oxygen barrier layer extends along the body portion and the bottom portion.

Provided is a manufacturing method for a double container that allows easy manufacturing with a molding device not significantly different from conventional devices and that can, at a lower cost than the processing cost of conventional technology, very easily and reliably form, in a comparatively rigid outer container and in a double container that allows, inside the outer container, capacity to be varied with respect to the amount of content, an opening for allowing external air to enter. When a pair of partial molds are brought near each other in order to form a split mold, at least part of the mating faces of the pair of partial molds forms a projection by sandwiching a small outer diameter portion of a parison, a gap that passes between the double container is created by cutting off the projection, and the gap is opened and expanded by screwing on a cap.

A method for manufacturing a container including: forming a preform by injection molding, the preform having a bottom portion, a body portion, and a finish portion including a top sealing surface, threads, and a support flange; forming the preform such that the top sealing surface is made of a base layer, and such that the body portion and the bottom portion are both made of the base layer and an oxygen barrier layer; and forming the container from the preform by blow molding. The top sealing surface includes only the base layer. The body portion and the bottom portion both include an inner portion made of the base layer, an outer portion made of the base layer, and an oxygen barrier layer between the inner portion and the outer portion.