A.k. Technical Laboratory, Inc.

Nobukuni Ibe

Setsuyuki Takeuchi

Yukio Yanagimachi

A biaxial stretching bottle in which a pair of carrying handles are provided oppositely constituted on both sides of a neck portion in such a manner as to be bent freely, and the biaxial stretching bottle having the carrying handle with a structure which can improve durability strength of a base portion and a connection structurally. A pair of U-shaped carrying handles, which a handle grip portion and an arm portion of both sides are formed integrally, are connected to and formed on both ends of the base portion constituted by overhang pieces formed on the symmetrical positions of both sides of the neck portion. Brackets are constituted unitarily across the lower surface of the vicinity of both ends of the base portion and a side surface of the neck portion and stoppers are projected and arranged on the upper surface of the base portion.

Biaxial stretching bottle having carrying handle

A biaxially oriented bottle having a carrying handle is provided. A carrying handle, which is provided at a side surface of a neck portion, and which is injection molded together with the neck portion of a preform, is used without further modification as the carrying handle of a biaxial stretching blow molded, thinly formed bottle. The carrying handle is integrally formed in a U-shaped configuration from a grip portion and arm portions on both ends of the grip portion. The arm portions are integrally formed with base portions comprising projected pieces formed at symmetrical positions on both sides of the neck portion. The arm portions, moreover, extend out to the sides with a length greater than the height of the neck portion. The boundary of the base portion and arm portion is thinly molded by being constricted and forms a connecting portion which can be freely bent in a vertical direction. The base portion is supported by a bracket which is integrally formed with the bottom surface of the base portion and the side surface of the neck portion.

Biaxially stretched bottle having a carrying handle

A biaxially stretched bottle made of a thermoplastic resin having a carrying handle formed by integrally injection molding on the side of a lower neck portion of a preform at the same time when the preform is molded and applied as-formed as a carrying handle of a thin-wall bottle formed by stretch blow molding, wherein the carrying handle is formed with its arm portions extending across the both sides of the neck portion, enabled to rotate up and down with respective joining portions of base portions and the arm portion which are formed in symmetrical positions on both sides of the neck portion as its axis. This enables the change in the position of a gripping portion, which has been difficult in conventional integral forming, even in a bottle made of a material resin like PET resin which lacks in flexibility.

Biaxially stretched bottle having carrying handle

An improved method for injection stretch blowing is provided. In the process, a molten resin is injected into an injection cavity defined by an injection mold, a lip mold and an injection core to form a desired preform, the cooling time for this preform being positively reduced to form a rigid skin layer on the outer surface of the preform without increasing the thickness. It is then released from the injection mold and transferred into the blow mold with a mouth portion being held with the lip mold while the skin layer keeps the configuration of the preform and the interior is in a high temperature state, and is stretch blow molded into a hollow molded article, e.g. a bottle whose major portion is ultra-thin, at the moment when the surface temperature of the preform that rises due to its own interior temperature is significantly higher than a glass transition temperature (Tg) and is expected to reach to a peak temperature. Thereby, it is possible to allow molding of a hollow molded article having a thickness of 0.17 mm or smaller without being affected by limitations of thickness of the preform and molding temperature even in a molding process where the preform is released from the mold at a high temperature and is then immediately subjected to stretch blow molding.

Process for injection stretch blow molding

There is provided a bottle having a handle formed by stretch blow molding comprising an improved structure which facilitates carrying even a relatively large bottle in which a bendable handle having a flat shape extending in a transverse direction is integrally formed below a threaded portion of a neck of the bottle, and a connecting portion of said handle includes a narrow portion which is transversally provided by reducing the thickness at an intermediate portion of the connecting portion, whereby making the finger engaging tab bendable at the narrow portion in upper and lower directions, and molecular orientation of the resin material is performed by the narrow portion.

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Nagano-ken, Japan

Nobukuni Ibe