A nozzle and system for hydraulic blow molding of a plastic container from a preform. The nozzle includes a nozzle body having a main bore extending therethrough and a seal pin received in the main bore and moveable between a closed position and an opened position. The seal pin include a central bore extending from an entrance orifice to an exit orifice, with the entrance orifice opening into the main bore of the nozzle body.

A linear drive for a stretch and/or blow moulding machine has a force sensor for detecting actual force absorption of the linear drive during operation, a storage device in which data for a desired force absorption during operation are stored, and a comparison device for comparing actual force absorption with desired force absorption and a signal emitter for outputting a signal if a previously defined deviation between desired force absorption and actual force absorption is exceeded. Also provided is a method for determining a friction coefficient of a linear drive for a stretching and/or blow moulding machine, by determining a desired force absorption of the linear drive during operation, detecting using a force sensor, actual force absorption of the linear drive during operation, comparing actual force absorption with desired force absorption, and outputting a signal if a previously defined deviation between desired force absorption and actual force absorption is exceeded.

A molding method for a resin molded article includes: a step of sandwiching a sheet-shaped resin in a molten state extruded downward by a pair of rollers, and sending out downward the sheet-shaped resin in the molten state by a rotational driving of the rollers so as to allow a first stretching; a step of drawing downward the sheet-shaped resin in the molten state sent out downward so as to allow a second stretching; a step of disposing the sheet-shaped resin in the molten state that is drawn in a side portion of a mold disposed below the pair of rollers; and a step of molding the sheet-shaped resin into a shape conforming to a mold shape by depressurizing a sealed space formed between the sheet-shaped resin in the molten state and the mold and/or pressurizing the sheet-shaped resin toward the mold.

Preform assembly for blow moulding a container, comprising at least a first and a second perform, wherein the first perform is positioned inside the second perform before blow moulding the performs into the container, wherein each perform has a body forming portion having a wall thickness of less than about 8 millimetres, preferably less than about 6 mm.

A biaxial stretch blow molding device comprises: a first guide shaft which is erected on an upper base and to which a blow core fixing member is slidably coupled; a second guide shaft erected on the stretch rod fixing member; a support member fixed to the first guide shaft and provided with a guide hole through which the second guide shaft is slidably inserted; a first drive device that moves the blow core fixing member forward and backward independently of the stretch rod fixing member; and a second drive device that moves the stretch rod fixing member forward and backward independently of the blow core fixing member.

Disclosed is a method for adjusting the travel of a stretching sliding rod that belongs to a device for forming hollow bodies made of thermoplastic material by stretch blow molding, with the stretching rod being controlled cyclically in terms of sliding from a rest position to an adjustable stretching end position by stretching the malleable wall of a hollow body, before returning to its rest position to begin a subsequent stretching cycle of another hollow body, with the method including a control step that consists in detecting whether an axial force that opposes the sliding of the stretching rod at the end of travel is above a determined upper boundary. The stretching end position is adjusted automatically by being subjected to the axial force that is detected during the control step.

A biaxial stretch blow molding device comprises: a first guide shaft 57 which is erected on an upper base 51 and to which a blow core fixing member 54 is slidably coupled; a second guide shaft 67 erected on the stretch rod fixing member 56; a support member 59 fixed to the first guide shaft 57 and provided with a guide hole 68 through which the second guide shaft 67 is slidably inserted; a first drive device 63 that moves the blow core fixing member 54 forward and backward independently of the stretch rod fixing member 56; and a second drive device 70 that moves the stretch rod fixing member 56 forward and backward independently of the blow core fixing member 54.

A plastic container includes a hollow body portion including a lower supporting base portion; a sidewall portion extending upwardly from the base portion; and a neck portion extending upwardly from the sidewall portion. The neck portion includes a support flange having an upper and lower surface, at least one thread, and a dispensing opening at the top of the neck portion. In embodiments, a closure may be provided to form an assembly. A preform and method for making a container are also disclosed.

Method for forming plastic preforms into plastic containers, wherein a preform is expanded into the container by exposure to a flowable medium, wherein the medium is stored under a first pressure in a first pressure reservoir and is stored under a second pressure higher than the first pressure in a second pressure reservoir, and the preform is subjected to a first blowing pressure via a flow connection between the first pressure reservoir and the preform and is subjected to the second blowing pressure via a flow connection between the second pressure reservoir and the preform and wherein at times the flowable medium is returned to the first pressure reservoir, and first values characteristic of the action of the medium on the preforms are predetermined taking into account the first values, second values are determined which are characteristic for a point or period in time of the return of the mediums into the first pressure reservoir.

A plastic container manufactured from a preform with a mass share of at least 80% polyester and possibly an additive from the group consisting of dyes, fillers, catalysers, additives and lubricative additives. The plastic container comprises a container neck and a container shoulder which connects with the container neck and merges into a container body closed by a container base. The container shoulder, the container base and the container body are exclusively reshaped by a 2-stage stretch blow moulding method. The polyester is a copolyester and comprises groups which originate from the monomers cyclohexanedimethanol (CHDM) and/or monoethylene glycol (MEG), terephthalic acid (TPA) or its derivatives and isophthalic acid (IPA) or its derivatives. At least a part-region of the container body and/or of the container shoulder comprises a sharp edge with a radius of less than 0.5 mm. A method of manufacturing the plastic container is also described.