A method for holding together, in its closed state, a blow mold of multipiece design of a blowing station for the blow molding of containers from preforms made of a thermoplastic material using a compressed air-operated mold clamp exerting a holding-together force. The mold clamp is pressurized with compressed air for the purpose of and for the duration of the generation of the holding-together force. The blowing station has a relief valve which can be controlled by control compressed air from a control compressed air line. The mold clamp is pressurized at least at times with control compressed air from the control compressed air line.

This invention discloses a process for preparation of a balloon expandable biodegradable polymer stent with thin struts (strut thickness 130 m or less, preferably 100-110 m) with high fatigue and radial strength. The invention discloses a process for the preparation of a biodegradable polymer stent which involves radially deforming the biodegradable polymer tube by applying pressure to it with an inert gas at a predefined temperature in multiple stages with each successive stage having a pressure higher than the pressure applied in a previous stage. The process further involves maintaining the predefined temperature and pressure conditions of each stage for a specified time period after application of the pressure.

Method for moulding and sterilizing a container made of plastic material, comprising the steps of: opening a mould (4) made of metal material; inserting a parison (3) into the mould (4); closing the mould (4); inserting a stretching rod (23) made of metal material into the parison (3); blowing and stretching the parison (3) in such a manner as to obtain the container; keeping the stretching rod (23) inside the moulded container; evacuating the blowing fluid; applying a voltage difference between the stretching rod (23) and the closed mould (4) in such a manner as to transform the fluid at atmospheric pressure remaining inside the moulded container into plasma.

Method of manufacturing a container (2) by stretch-blow molding in a mold (8) from a blank (3) of plastic material, which comprises the operations consisting of: measuring the pressure prevailing inside the blank (3) during a pre-blowing phase; detecting an instant corresponding to a local minimum pressure in the blank (3); placing in memory the instant at which said minimum pressure occurs as well as the corresponding pressure prevailing in the blank (3); comparing the instant and the pressure of the detected minimum with, respectively, a predetermined instant and pressure of a theoretical minimum pressure; if the measured minimum and the theoretical minimum do not coincide, ordering a modification of at least one of the following parameters: pre-blowing pressure, pre-blowing flow rate, stretching speed, heating temperature.

A control system (34) for a unit (9) for forming containers (2) from blanks (3) provided with a series of forming stations (10) each provided with a mold (11), the system (34) including a master control unit (36) and a series of slave controllers (37) each associated with at least one forming station (10), each controller (37) being programmed to: control the or each associated forming station (10) according to a forming command (CF) loaded in the controller (37); take into account a pressure measurement in the mold (11), from this measurement, establish a blowing curve describing the change in the fluid pressure in the mold (11), analyze the blowing curve and extract therefrom the coordinates of at least one singular point (S); communicate the singular point (S) to the control unit (36).

A system for simultaneously forming and filling a container having a mold cavity defining an internal surface and adapted to accept a preform. The system includes a servo pressure system having an inlet and an outlet operable to output fluid, such as a liquid commodity, and a blow nozzle receiving the fluid from the servo pressure source and transferring the fluid at a pressure into the preform thereby urging the preform to expand toward the internal surface of the mold cavity and creating a resultant container, wherein the fluid remains within the container as an end product and wherein the servo pressure system and the blow nozzle output the fluid at a rate sufficient to fully form and fill the container in less than about 0.5 seconds.

A stretch blow molding system (200) is provided. The stretch blow molding system comprises a cylinder (201) including a movable stretch rod (202) and a blow-mold valve (204). The blow-mold valve (204) comprises a first fluid port (204a) in fluid communication with a first pressurized fluid source (364a). The blow-mold valve (204) also includes a second fluid port (204b) in fluid communication with a second pressurized fluid source (364b). A third fluid port (204c) of the blow-mold valve is in fluid communication with the cylinder (201) and selectively in fluid communication with the first fluid port (204a) and the second fluid port (204b).

The present invention relates to a method for manufacturing containers from thermoplastic materials by blow moulding or extrusion blow moulding a preform that has been pre-heated in a furnace then placed in a mould consisting of two half-moulds that define a moulding cavity, said preform being blown into the mould, optionally with a pre-blowing step. Said steps of heating the preforms, pre-blowing and blowing are controlled by a control unit on the basis of various control parameters such as the temperature in the furnace, the blowing pressure in the mould and/or the pre-blowing pressure and/or the pre-blowing flow rate and/or the speed of the stretching rod, for example. Said method is characterised in that it comprises at least the following steps: i) measuring the wall thickness of said containers at at least two different heights upon exiting the mould; ii) comparing the thickness measurements with setpoint values determined for each height of the containers; iii) if the difference between the thickness measurements and the determined setpoint values is greater than a determined threshold, modifying at least one of the control parameters, said modified control parameter(s) being selected at least by calculating the theoretical effects of the variation for each parameter on the thicknesses, then selecting the parameter or parameters that cause the smallest difference between the measured thickness values and the theoretical thickness values; iv) steps i) to iii) are repeated until the differences between the thickness measurements and the determined setpoint values are below said determined threshold.

A device for treating hollow bodies, comprising at least a nozzle and a circuit for setting a pressurized airflow in circulation, having a valve and a first pressure sensor measuring a first pressure; a control distributor of said valve; a line connecting said distributor to said valve; a control unit with a time measurement component; wherein said device comprises a second pressure sensor situated along said line, measuring a second pressure, and wherein said control unit comprises means that are able to determine a differential between the measurement of the first pressure and the measurement of the second pressure as a function of time. The invention also relates to a corresponding treatment method.

A blow molding mold is adapted to be mounted to a blow molding device and having a cavity surface. The blow molding device has a pressurized liquid supply function of supplying a pressurized liquid to stretch the preform toward the cavity surface and also has a head space defining function of defining head space in the container by drawing back a part of the liquid filled into the container through a blow nozzle or by withdrawing a stretching rod from the container filled with the liquid. The cavity surface includes a bottom forming surface, a trunk forming surface, a shoulder forming surface, and a mouth forming surface, and the trunk forming surface includes a flattened portion that, in the transverse section, has a flattened shape.