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.

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 liquid forming and filling system for filling a container with a liquid. The liquid forming and filling system having a motor, a gear box operably coupled to the motor configured to receive a driving output from the motor and outputting a gear box driving force, a linear screw operably coupled to the gear box configured to produce linear movement in response to rotational movement from the gear box, a forming cylinder configured to output pressurized liquid for forming and filling the container, the forming cylinder being in an inverted orientation, a top manifold plate and end cap vent valve assembly coupled to the forming cylinder for receiving the pressurize liquid, and a vent valve operably coupled to the top manifold plate and end cap vent valve assembly configured to vent air entrapped within the pressurized liquid.

Method for controlling a method for the manufacture of a container by stretch-blow-molding of a plastic preform (2) in a machine (1) including a mold (26), the preform (2) having a body (3), a neck (4) opening at one end of the body (3) and a bottom (5) closing the body (3) at another end thereof, the manufacturing method including the operations involving:heating the preform to a predetermined temperature in a thermal conditioning oven (10);introducing the preform (2) into the mold (26);moving a stretching pin (28) so as to stretch the preform (2); this control method involving a step that consists in determining the position of impact (P0r) of the stretch pin (28), namely the position it occupies at the moment at which it reaches the bottom (5) of the preform (2) during its movement.

The invention relates to a method for producing containers (14) from preforms (12) made of thermoplastic material by means of a blow molding machine (10) comprising at least one temperature control device (26) and one forming device having at least two forming stations (16), wherein the preforms (12) are temperature controlled by means of the temperature control device (26) on the basis of specifiable first control parameters, and wherein one temperature-controlled preform (12) is formed by means of one of the forming stations (16), respectively, on the basis of specifiable second control parameters into a container (14), wherein at least one of the second control parameters is individually specified for each of the forming stations (16). The invention furthermore relates to a blow molding machine (10), designed for executing the method according to the invention, for producing containers (14) from preforms (12) made of thermoplastic material.

A method of forming a container from a plastic preform while using a liquid as a blow medium. During the method, liquid is withdrawn from the container to reduce pressure within the container prior to disengaging of the injection head from the container. In one aspect the method involves the opening of a recirculation valve to reduce the pressure. The opening of the recirculation valve allowing air dispersed within the liquid to rise to the top of the container before disengaging of a forming head from the container. As a result, splashing and spillage of liquid from the neck of the container is eliminated when the forming head disengages from the container.

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.

The present invention relates to a method and an apparatus for producing containers filled with a liquid filling material from preforms by introducing pressurized filling material into the preform. The object of the invention is to propose such a method and such an apparatus in which both the desired filling pressure and the desired volumetric flow rate of the filling material are reliably available throughout the entire molding and filling phase. The object of the invention is achieved by a method in which the filling material is pressurized by a pressure pump 7 and is introduced into the preform 1 through a filling valve 6 at a molding and filling station 3, said method being characterized in that, when the filling valve 6 is closed, a pressure accumulator 10 disposed between the pump 7 and the filling valve 6 is pressurized by the pump 7 and filled with a volume of filling material, and when the filling valve 6 is open, the pressure accumulator 10 delivers the accumulated pressurized filling material to the preform 1. The object of the invention is further achieved by a corresponding apparatus that comprises a pressure pump 7 and a filling valve 6, connected to one another by a feed line 2, characterized in that said apparatus comprises a pressure accumulator 10, disposed in the feed line 2 between the pressure pump 7 and the filling valve 6.

Provided is a device for reshaping plastic parisons into plastic containers, including a plurality of blow moulding stations each having blow mould devices which form a cavity, inside which the plastic parisons can be reshaped into plastic containers, and including at least one application device by which a flowable medium can be applied to the plastic parisons for expansion thereof, and at least one valve device which is arranged between at least one pressure reservoir and at least one application device and by which the supply and/or removal of the flowable medium, in particular under high pressure, in particular the blowing pressure and/or volume flow thereof, to the application device can be influenced or controlled.

The invention relates to a method and an apparatus for producing liquid-contents-filled containers (22) from preforms (1) by contents being introduced into the preform (1) under a filling pressure, wherein the contents are placed under pressure by a pressure pump (7) and are introduced into the preform (1) at a molding and filling station (3) by a filling valve (6). A pressure accumulator (10) arranged between the pressure pump (7) and the filling valve (6) is subjected to pressure and is filled with a volume of contents by the pressure pump (7). The invention is distinguished in that a displacement pump (26) having a filling chamber (28) for the contents and having a displacement body (30) guided so it is movable therein is provided, wherein the displacement body (30) divides the chamber (28) into a first partial chamber (28a) on the filling station side and a second partial chamber (28b) facing away from the filling station, each of which can be brought into a fluidic connection with the pressure accumulator (10). The displacement body (30) has a drive connection to a drive unit (32) and is drivable by the drive unit (32), wherein when the filling valve (6) is opened, the drive unit (32) and/or the pressure accumulator (10) each at least temporarily apply a drive force to the displacement body (30), and at the same time the displacement body (30) displaces at least a part of the quantity of contents required for the forming of the preform (1) in the direction of the preform (1).