The method and the device are used for blow-molding containers. A preform made of a thermoplastic material is first subject to a thermal conditioning operation along a transport path in the region of a heating section. Thereafter, the preform is formed into the container inside a blowing mold by applying blowing pressure. While the preform is shaped into the container, at least one parameter (49, 50) characterizing the shaping is measured and evaluated by a control unit. Depending on said evaluation, at least one controlled variable (48, 46) influencing the shaping operation inside a closed loop is varied in order to match the measured parameter to an associated target value. In this way, it becomes possible to subject the container parison developing during the blow-molding operation to a predetermined defined development.

A pressure is accumulated in advance in a cylinder (35), which is used for conversion to air for the outside of a mouth, with an opening-closing valve (V3) of the cylinder (35) being closed, and when a pressurized liquid (L) is supplied into a preform (PF) through a blow nozzle (13) by actuating a plunger pump (31) and by opening a sealing body (15), the opening-closing valve (V3) of the cylinder (35) is opened to thereby apply the pressure accumulated in the cylinder (35) to the liquid (L) supplied into the preform (PF).

A blow molding apparatus that supplies a pressurized liquid into a bottomed tubular preform fitted to a mold used for blow molding and molds the preform into a shape conforming to a cavity of the mold, the blow molding apparatus including: a blow nozzle fitted to a mouth tubular portion of the preform; a plunger pump configured to supply the pressurized liquid into the preform through the blow nozzle; and a control device configured to change an actuation rate and an actuation force of the plunger pump during the supply of the pressurized liquid into the preform to regulate a peak pressure of the liquid supplied into the preform to be from 3.5 MPa to 5.0 MPa.

A method of shaping plastics material pre-forms into plastics material containers with the steps: introducing a plastics material pre-form into a blow mold; conveying the blow mold with the plastics material pre-form along a pre-set conveying path; acting upon the plastics material pre-form with a gaseous medium during a pre-set period of time for the expansion thereof, wherein the supply of the gaseous medium is carried out in a controlled manner; and releasing the container from pressure at a pre-set point in time. According to the invention the pre-set point in time (t2) is variable.

A blow molding apparatus includes: a temperature adjusting unit configured to supply a preform with cooling air to perform a temperature adjustment of the preform, the preform having been injection-molded, having a bottomed shape and made of a resin; a blow molding unit configured to blow-mold the preform that has been subjected to a temperature adjustment with blow air, and configured to manufacture a container made of a resin; an air tank configured to supply the temperature adjusting unit with the cooling air; and a recovery unit configured to recover the blow air exhausted from the blow molding unit into the air tank.

There is provided a resin container manufacturing apparatus configured to stretch a preform disposed in a stretch blow molding mold by a stretching rod and stretch the preform by introducing blow air into the preform so as to form a resin container. The resin container manufacturing apparatus includes detection means for detecting an actual position of the stretching rod inserted into the preform, and supply control means for controlling a supply state of the blow air based on a detection result of the detection means.

A process for regulating a cyclical production of containers by stretch blow molding from preforms, comprising an initializing phase, a regulated production phase, and a stabilizing phase. In the regulated production phase, the preblowing curve is measured and stored, and a real instant and/or a real pressure is calculated, corresponding to a characteristic point. A new value of at least one operating parameter of the machine is calculated as a function of a difference between a real instant and a reference instant and/or between a real pressure and a reference pressure. The regulated production phase monitors for change, imposed by the operator, of a value of an operating parameter of the machine and automatically updates the regulating parameters in the stabilizing phase while production is continued. The process also corrects the reference instant and/or the reference pressure as a function of the real pressure and/or real instant values stored.

Apparatus for forming plastic preforms into plastic containers, having a forming device which has a plurality of forming stations each having a stretching bar for stretching the plastic preform and an application device act upon the plastic container with a flowable medium. The forming device has at least four pressure reservoirs for the flowable medium, which each have predetermined pressures, and a valve block with at least five process valves. The application device is configured for producing a fluid connection between the valve block and a mouth region of the plastic preform in order to act upon the plastic preforms with the pressurised flowable medium, and the process valves are configured to act upon the plastic preforms with different pressures, wherein at least one process valve is configured for producing a connection between the plastic preform and an environment.

Provided is a method for diagnosing a forming fluid leak in at least one station for forming hollow bodies during a production cycle sequence. Each cycle includes a first phase of pressurizing the hollow body by connection to a source of forming fluid compressed to a maximum blowing pressure, followed by a second phase of passively maintaining pressurization during which the hollow body is isolated from the forming fluid source. The diagnostic method includes a determining the change in the pressure of the forming fluid in the hollow body by carrying out a series of multiple pressure measurements successively during the second phase.

Blow molder system and associated method optimizes the performance, energy efficiency and/or operating costs of the blow molder. A blow molder controller executes a system model that relates blow molder input parameter changes to the characteristics of containers generated by the blow molder. Equipped with energy and/or operating cost data for operating the blow molder, the blow molder controller can select a set of blow molder input parameter changes for the blow molder that: drives the containers produced by the blow molder toward desired container characteristics, in an efficient amount of time, and in cost effective manner, considering the energy costs involved in implementing the changes.