A liquid blow molding method of molding a synthetic resin preform having a mouth portion into a liquid container of a predetermined shape, the method including: an air-liquid replacement step of exhausting the air inside the preform to the outside while a liquid is supplied into the preform from the mouth portion through a blow nozzle; an air-liquid separation step of separating the air from the liquid inside the preform by rotating the preform about an axial center of the mouth portion; and a blow molding step of molding the preform into a container of a predetermined shape by supplying a pressurized liquid into the preform from the mouth portion through the blow nozzle, after the air-liquid separation step.

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 liquid blow molding method comprises: a preliminary pressurization step of operating a pressurization supply source (30) in a state in which a blow nozzle (23) is closed by a seal body (27), to preliminarily pressurize a liquid (L) between the pressurization supply source (30) and the blow nozzle (23); an operating condition setting step of setting an operating condition of the pressurization supply source (30) based on data obtained as a result of the preliminary pressurization step; and a blow molding step of operating the pressurization supply source (30) under the operating condition set in the operating condition setting step in a state in which the blow nozzle (23) is opened, to liquid blow mold a preform (2) into a container of a predetermined shape.

An apparatus for the fabrication of a container, comprising a mold defining the form of said container and container and configured to accommodate a substantially tubular preform, an injection head configured to interface with the preform and establish fluid communication with a cavity thereof; an injection valve configured to selectively permit fluid communication through said injection head, and a stretching rod slideably disposed within the injection head; said apparatus further comprising a displacement plunger being disposed coaxially about and mobile relative to said stretching rod between a retracted position substantially within the injection head and an extended position wherein said displacement plunger projects at least partially from said injection head.

A method, system, and preform for liquid forming of the preform into a final-shaped container using the liquid to be contained in the final-shaped container. The preform undergoes a stretching step to a size less than the size of a base of the final-shaped container, before being relocated and stretched to the final shape by the liquid. A stretch rod sealably connects with an interior surface of the preform to partially isolate a gate portion of the preform. The isolation is effected by a portion of the inner surface of the preform extending inwardly, or by a deformable member on the stretch rod which can selectively extend outwardly to contact the interior surface of the preform. The stretch rod includes a selectively heatable tip to heat the gate portion of the preform. The gate portion of the preform includes inner, outer, and core layers which comprise a material configured to affect the thermal properties of the gate portion.

A blow molding device includes: a tubular-shaped nozzle; a tubular-shaped sealing body configured to be displaced between closing and opening positions; and a stretching rod surrounded by the sealing body. The sealing body includes a tubular wall, which has a drawing-in hole extending from one end to another end, the one end being open at a lower end of the tubular wall, and the other end being open at an outer circumferential surface of the tubular wall. The nozzle has a drawing-in path configured to communicate with the other end of the drawing-in hole when the sealing body is in the closing position. The blow molding device further includes a fluid drawing-in source configured to draw in the incompressive fluid from the drawing-in path.

A liquid blow molding device includes a cylindrical nozzle having, at a lower end thereof, a seal surface that, when the nozzle is inserted into a mouth part, abuts on a step surface provided at an inner circumferential surface of a preform in an axial direction to seal a gap between the nozzle and the inner circumferential surface of the preform. The preform has, at the inner circumferential surface thereof, the step surface to be abutted on by the seal surface of the nozzle in the axial direction. The step surface is tapered to be higher on a radial inner side than on a radial outer side.

A method of manufacturing a liquid container, in which, a nozzle unit includes a blow nozzle having a supply port and a spare supply tube having, at a lower end thereof, a spare supply port. The method includes: an air exhausting step of exhausting the air in the preform to the outside by supplying a liquid into the preform from the spare supply port located at a bottom portion of the preform; a liquid blow molding step of molding the preform into a liquid container by supplying a pressurized liquid from the supply port into the preform; and a headspace forming step of forming a headspace by exhausting the liquid from the inside of the liquid container.

A liquid blow molding method of molding a synthetic resin preform having a mouth portion into a liquid container of a predetermined shape, the method including: an air-liquid replacement step of exhausting the air inside the preform to the outside while a liquid is supplied into the preform from the mouth portion through a blow nozzle; an air-liquid separation step of separating the air from the liquid inside the preform by rotating the preform about an axial center of the mouth portion; and a blow molding step of molding the preform into a container of a predetermined shape by supplying a pressurized liquid into the preform from the mouth portion through the blow nozzle, after the air-liquid separation step.

A nozzle is provided for engaging with lightweight preforms for blow-molding the preforms into plastic containers without damaging the finish portion of the preforms. The nozzle includes a seal configured to engage with a stepped interior of the finish portion and enables stretching and/or blow-molding the preform into a container. The seal tightly engages a smooth surface inside the finish portion without damaging the surface or a sidewall of the finish portion. In some embodiments, the seal includes a profile shape that mates with a transitional surface comprising the stepped interior of the finish portion. The profile shape distributes the contact force of the seal over a maximal area of the transition surface so as to minimize the total pressure exerted onto the finish portion. The profile shape reduces potential cracking of a thin-walled region of the finish portion during stretching and/or blow-molding the preform to form the container.