Abstract: 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.

Abstract: There is provided a hot runner system comprised of a cylindrical runner block (4) which has a hot runner (12) extending through a core portion thereof to communicate between a gate formed on a lengthwise central portion of a side surface of the runner block (4) and the interior of each of a plurality of nozzle members (3), the runner block (4) being enclosed by band heaters (15), blocking members for the hot runner (12), and support plates (6) standing on a base plate (8) and fitted to both end portions of the runner block (4). The blocking members (16) are fitted into both the end portions of the runner block (4). Heaters (22) and (23) are arranged into the core portion and around the periphery of each blocking member, respectively, for compensating for heat loss due to heat radiation and heat transfer to the support plates (6) and for keeping the temperature of each end portion of the runner block in a predetermined temperature range.

Abstract: A mold clamping apparatus in which hydraulic oil that is forcibly discharged into hydraulic lines from one of two kinds of cylinders, that is, a differential mold clamping cylinder and a mold clamping oil chamber of a mold opening/closing cylinder, is, in an alternating manner, provided to the other cylinder as its operating oil. This feature enables the simultaneous operation of the two kinds of cylinders as well as reduction in operating time in which the mold is opened or closed. The mold clamping apparatus includes a stationary mold, a movable mold which closes with respect to the stationary mold, a core movable through the movable mold into and out of the stationary mold. The movement of the core into and out of the stationary mold is effected by a differential mold clamping cylinder which is separate from a mold opening/closing cylinder for the movable mold and is fitted with a booster ram.

Abstract: 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.

Abstract: A heat-resistant packaging container made of a polyester resin, formed by stretch-blow molding is provided. A top portion of a bottom face is formed to have a large wall thickness to impart a resistance to heat deformation. A peripheral wall of the bottom face is formed to have a wall thickness that is gradually reduced from the top portion toward an arc grounding edge around the bottom face. An outer peripheral wall of the bottom portion is stretch molded from inside of the grounding edge so as to have a wall thickness as same as that of the body portion to attain a heat resistance. The inside of the grounding edge connecting to the peripheral wall of the bottom face is formed into a tilt surface which is oriented upwardly in consideration of an amount of expanding deformation &agr; of the grounding edge due to heating and loading.

Abstract: When a desired preform is to be molded from a molding material which is a polyester resin composed of a blend of PET and PEN by compressing and melting the molding material by the rotation of a screw in a heating cylinder and injecting and filling the molten material into a mold, a plastication zone 13 for the molding material is formed between a compression zone 12 of the injection screw 2 and a metering zone 14 at an end of the screw. In the plastication zone 13, the molding material is subjected to melting, relaxation, kneading and relaxation steps in order to melt and remove an unmolten material until the molten material reaches the metering zone 14. To prevent a molded article from becoming opaque and the production of a gel-like unmolten granular material when a polyester resin composed of a blend of PET and PEN is used as a molding material.

Abstract: 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.

Abstract: A bottle with a hanging tool detachably provided. The hanging tool comprises a flat and long connection portion extending sideways from the neck portion and having a length shorter than an outer diameter of the bottom of the bottle, and a separately molded wide annular handle portion. The connection portion is provided at its intermediate portion with a narrow portion crossing the connection portion transversely to reduce a thickness thereof, thereby making the connection portion vertically bendable at the narrow portion, a free end of the connection portion and the handle portion are formed at their predetermined locations with joint portions comprising a pair of engagement means, and the handle portion is detachable attached to the connection portion. Thereby an injection mold for molding a preform can be simple in structure and is suppressed from being enlarged.

Abstract: A wide mouthed container of synthetic resins for a paint, wax and the like, formed thinly in the body portion thereof by injection stretch blow molding is provided. A mouth portion of the wide mouthed container is of large diameter and comprises an internal wall integral with a body portion having a bottom, a belt shaped external wall integrally formed on the outside of the internal wall via a joint portion of required width to be in H-shape, and an upper and lower annular grooves between both the walls sectioned by the joint portion. The body portion is stretch blow molded thinly from the underside of the internal wall to a position where the lower edge of the external wall touches the body portion to form the side surface of the body portion on the same level as said external wall and to form the lower annular groove into a hollow in the lower part of the mouth portion.

Abstract: A hermetic seal for sealing a mouth of a wide-mouthed bottle having a body portion thinly formed by stretch blow molding, and a wide-mouthed bottle a mouth of which is sealed by the hermetic seal. A synthetic resin laminated sheet comprising an aluminum sheet or an aluminum foil as a base is punched into the same shape as a mouth of the wide-mouthed bottle to form the hermetic seal. The sheet is formed into a flat peripheral portion and a bellows inside the flat portion to have alternate multiple mountain and valley portions by press molding concurrently with the punching.

Abstract: A method for forming an inner thread of a preform is provided, in which an injection core can be removed after molding the inner thread on an inner surface of a neck portion with the base portion of the injection core by enlarging the diameter of the neck portion by blowing air. An inner wall 42b with a transferred inner thread is molded by using a barrel spacer 16 inserted removably into a neck mold 6 from an injection mold 1 side and a base portion 10a of the injection core 10 that has a thread pattern 12 on the outer surface and is inserted into the injection mold 1 through the neck mold 6. While the temperature of the inner wall 42b is high enough for deforming, the spacer 16 is removed to form an expansion space in the neck mold.

Abstract: There is provided a handle comprising a grip portion 2 which is longitudinally long enough to extend from an upper edge to a lower edge of a recess 21 in a side portion of the bottle 20, an upper contact plate 4 which projects inward and obliquely downward from the bottom of a holding portion 3 provided on an upper end of the grip portion and has an engagement piece 6 projecting upward and facing the holding portion 3, and a lower contact plate 5 which is formed from a lower end of the grip portion, bent inward and obliquely upward and has an engagement piece 7 projecting downward at its distal end. A connection step portion 10 is formed in an upper end portion of the lower contact plate 5 and a fixing plate 9 having such a length that its distal end reaches the inside of the connection step portion 10 extends obliquely toward the grip portion by bending its connection portion with the upper contact plate 4.

Abstract: 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.

Abstract: 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.

Abstract: In order to stretch an injection-molded preform by a stretching rod in the axis direction and to blow mold it into a hollow product such as a vessel with a predetermined shape in a blow mold, some of the blow air after used is collected in a low-pressure working-air tank set separately from a high-pressure blow-air tank and operating selector valves in a circuit and the collected air is used for some of the working air for an air cylinder for operating units related to stretch-blow molding by air cylinders. To decrease the availability factor of a compressor by collecting used blow air and thereby, make it possible to cut the cost required for compressed air and decrease exhaust noises.

Abstract: This invention relates to a bottle with an ear obtained by orientation blow molding, in which a mounting portion positioned at a predetermined height which has a large diameter and whose upper portion is composed of an outer wall in the form of an injection molded flange and an inner wall oriented internally thereof and placed in close contact therewith, said mounting portion having a predetermined width in an outer periphery thereof, is formed below a mouth portion of a bottle by injection orientation blow molding, an upper edge of said mounting groove is formed to have an edge having a plurality of notches at equal intervals, a mounting ring internally provided with a plurality of projecting surfaces positioned at the mounting groove through said notches is formed integral with a bended end of an ear, and the projecting surfaces of said mounting ring and the upper edge of said mounting groove are fitted with each other whereby the ear and the bottle are integrally connected.

Abstract: In a vent arrangement comprising a heating cylinder 1 containing therein a screw and provided with a vent hole 3 and a reduced pressure exhaust path 4 provided with a vacuum pump and connected to the vent hole 3 for draining volatile fractions of a material to be molded from the heating cylinder by reducing the pressure in the vent hole by means of the vacuum pump, said volatile fractions are removed by arranging in the exhaust path a filter unit 7 filled with a granular filtering material 8. The material to be molded is used for the filtering material 8. According to the above construction, it can be achieved to efficiently remove volatile matters by using the molded material as the filtering material of the filter unit arranged in the reduced pressure exhaust path of a vent arrangement.

Abstract: There is provided a method of molding a large container including the steps of preparing a preform from an injection-molded, thick-wall, closed-end parison by repeatedly and intermittently applying an air blow pressure to the parison and releasing the air blow pressure therefrom, and stretch blow molding the preform to a thin-wall large container. The closed-end parison is released from a mold immediately after a skin layer, keeping a parison shape, is formed on the surface of the closed-end parison having a high inner temperature, and is then molded to a preform with a preform mold heated to a predetermined temperature, while the surface temperature of the parison is increased by the inner temperature. The preform is kept at a stretch blow molding temperature and is stretch blow molded into a blow mold to produce a large container.