An apparatus for forming plastic preforms into plastic containers having a transport device which transports the preforms to be formed along a predetermined transport path, wherein the transport device has a rotatable transport carrier on which a plurality of forming stations are arranged which each have a blow-molding device within which the preforms can be formed into the containers. The forming stations each have a pressurizing device which pressurizes the preforms with a flowable medium, i.e., compressed air, wherein the pressurizing device subjects the preforms to a preblowing pressure, at least one and preferably two intermediate blowing pressures, and a final blowing pressure. The apparatus has a detection device which is configured for detecting at least one value characteristic of the plastic container, wherein depending on this value characteristic of the container, the duration of the pressure rise time of at least one intermediate blowing pressure can be regulated.

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 method for forming plastic preforms into plastic containers using at least one device for forming preforms into containers, wherein preforms are acted upon by a flowable and, in particular, gas-forming medium and are formed into the containers, wherein the preforms are acted upon with different pressure levels and the flowable medium is stored in at least two reservoirs and is supplied from these reservoirs to the preforms and at least one of these reservoirs is supplied with the flowable medium by a pressure supply device, wherein the target pressure in at least one reservoir is controlled, and wherein this target pressure is compared with an actual pressure in this reservoir. A value characteristic of this comparison is determined. An offset value is controlled on the basis of this value and is controlled in such a way that a predetermined pressure and the target pressure is set in the reservoir.

Disclosed is a method for forming plastic preforms into plastic containers, wherein a preform is expanded into the container by exposure to a flowable medium, wherein the flowable 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 first and second blowing pressures via a flow connection between the first and second pressure reservoirs, respectively. The preform and at least at times, the flowable medium is returned to the first pressure reservoir, wherein first values characteristic of the action of the flowable medium on the preforms are predetermined, wherein taking into account the first values, second values are determined which are characteristic for a period of time of the return of the flowable medius into the first pressure reservoir.

The disclosure relates to a device and a method for controlling the throughflow of blow-molding fluid during the blow molding of containers. It is the intention to provide a control device and a control method which permit a controlled or defined growth and a defined propagation of the container bubble formed by the expanding preform in the pre-blowing phase of the blow molding process without the specification of a specific setpoint value profile or of a setpoint value curve. The object is achieved by means of a control device and a control method having a proportional valve with a variable throughflow cross section, having an actuator for the operation of the proportional valve, having a means for detecting the position of the actuator, and having sensor means for detecting the valve inlet and valve outlet pressure, wherein a time for the attainment of the yield point for the preform, a container volume and a time period for the attainment of the container volume are predefinable, and, by means of a digital controller, during the pre-blowing phase, from the attainment of the yield point until the run duration, a calculation of control values for the operation of the actuator in order to attain the predefined container volume within the predefined time period is performed in automated cyclic fashion, and the actuator is operated in accordance with the calculated control values, wherein, in each calculation cycle, the calculation of the respectively next control value is performed taking into consideration the container volume attained prior to the respective calculation cycle and calculated on the basis of the previous actuator positions and the previous pressure profile.

A process is provided for making a blow-molded PET container comprising a wall having a density of between about 1.370 g/cc and 1.385 g/cc, a heat-induced crystallinity of from about 18% to about 25%, and a strain-induced crystallinity of from about 55% to about 75%, wherein the PET container, when filled with a liquid having a temperature of from about 100 C. to about 132 C. or when subjected to a pasteurization or retort process, will not experience a change in volume of greater than 3%.

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 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.

Molding unit (1) for the forming of a container (2) provided with a hollow recess (3), comprising: a mold (5) provided with a lateral wall (6) defining a cavity (7) and provided with a pocket (9) that comes out into the cavity (7); a boxing device (11) comprising: an insert (12) mounted in translation in the pocket (9) relative to the lateral wall (6) and provided with at least one passage (81) opening out; an actuator (16) integral with the insert (12) and provided with a piston (17) mounted in a chamber (22) defined in the wall (6) of the mold (5), the piston (17) subdividing the chamber (22) into a rear half-chamber (22A) in communication with a primary fluid duct (46), and a front half-chamber (22B) in communication, on the one hand, with a secondary fluid duct (50) and, on the other hand, with the pocket (9).

A method and machine for blow-moulding containers, the method involves selecting at least one characteristic point of the pressure in the container; for each selected point, defining a triggering criterion, and a pre-defined value thereof; during a production and data acquisition cycle, measuring the pressure in the container; for each selected point, defining a setpoint time for triggering, in the subsequent production cycle, the switch to the sub-phase after the characteristic point, such that: if the actual value of the criterion is to the pre-defined value, the setpoint time is the time at which the criterion has assumed a value equal to the predefined value, and if the actual value of the criterion is strictly higher than the pre-defined value, the setpoint time is after the actual time and is defined such that, at that time, the criterion assumes a value close to or coinciding with the pre-defined value.