Disclosed is a machine for reshaping plastic preforms into plastic containers with at least one reshaping station, which has a blow moulding arrangement inside which plastic preforms can be reshaped into plastic containers by application of a flowable medium, and with an application device which is configured for applying a flowable medium to the plastic preforms, and with a valve arrangement with at least two valve devices which is configured for feeding the flowable medium under at least two different pressures to the plastic preform during the reshaping thereof. At least one valve device has at least one valve piston which is movable with respect to a valve housing between two valve positions, and a check piston which is movable between at least two positions is arranged on this valve piston.

Disclosed is a machine for reshaping plastic preforms into plastic containers with at least one reshaping station, which has a blow moulding arrangement inside which plastic preforms can be reshaped into plastic containers by application of a flowable medium, and with an application device which is configured for applying a flowable medium to the plastic preforms, and with a valve arrangement with at least two valve devices which is configured for feeding the flowable medium under at least two different pressures to the plastic preform during the reshaping thereof. At least one valve device has at least one valve piston which is movable with respect to a valve housing between two valve positions, and a check piston which is movable between at least two positions is arranged on this valve piston.

A method for forming plastic preforms into containers, wherein a transport device transports the preforms along a transport path. The transport device has a rotatable transport carrier where forming stations are arranged for forming the preforms into containers. The forming stations each have devices which apply a flowable medium to the preforms, and the apparatus has three pressure reservoirs which store the flowable and gaseous medium to expand the preforms. The preforms are applied to a first operating mode with a first pressure level stored in the first pressure reservoir, and at least one second and one third pressure levels stored in the second and third pressure reservoirs. The second pressure level is higher than the first, and the third pressure level is higher than the second. The apparatus is operated in a second operating mode, which differs from the first mode by pressure level prevailing in the second pressure reservoir.

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.

A forming unit (20) for forming plastic preforms into plastic bottles, wherein the forming unit comprises a blow mould (20) having a first lateral portion (4), a second lateral portion (6) and a bottom portion (2), wherein said lateral portions as well as the bottom portion (2) form a cavity (15), within which the plastic preforms (10) can be formed into the plastic bottles, wherein the bottom portion (2) can be moved relative to the lateral portions (4) in a closed condition of the blow mould, wherein the forming unit (20) comprises a drive unit in order to move the bottom portion (2) relative to the lateral portions (4, 6), wherein the drive unit preferably has a movable piston element (32) which ist movable along a predefined stroke path. According to the invention, the apparatus has a first stroke path limiting means (22, 24) that limits the stroke path of the bottom portion (2) and/or of the piston element (32) in a first direction, wherein this stroke path limiting means (22, 24) is adjustable in order to modify the stroke path.

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.

The present application includes an injection molding step and a stretch blow molding step. The stretch blow molding step is configured to include: a first step in which preliminary blow air is introduced into a preform to stretch the preform in a state in which a stretching rod does not contact the bottom of the preform; a second step which is executed after the first step, and in which the preliminary blow air is introduced into the preform and the stretching rod is moved at a set speed and pressed against the bottom of the preform to stretch the preform; and a third step which is executed after the second step, and in which final blow air is introduced into the preform to stretch the preform.