摘要:
A method for placing an oven (12) for heat-treating preforms (13) into standby, including: a device (16) for conveying the preforms (13); at least one heating lamp (22); at least one heat-accumulation element (24, 26); and an electronic unit for controlling the heating lamps (22), characterized in that the method includes, in series: a first switching-off step (E1) which is triggered when a stop in production is determined, and in which the heating lamps (22) are completely switched off; and then a second temperature-maintaining step (E2) which is triggered after the first step (E1), and in which the heating lamps (22) are activated at a predetermined intensity in order to reheat the accumulation elements (24, 26).
摘要:
A method for placing an oven (12) for heat-treating preforms (13) into standby, including: a device (16) for conveying the preforms (13); at least one heating lamp (22); at least one heat-accumulation element (24, 26); and an electronic unit for controlling the heating lamps (22), characterized in that the method includes, in series: a first switching-off step (E1) which is triggered when a stop in production is determined, and in which the heating lamps (22) are completely switched off; and then a second temperature-maintaining step (E2) which is triggered after the first step (E1), and in which the heating lamps (22) are activated at a predetermined intensity in order to reheat the accumulation elements (24, 26).
摘要:
The invention concerns a method for controlling a blow molding machine (18) for making containers (12). The machine (18) comprises a control system (26) and a number of blow molding stations (22) and is characterized in that the control system implements iteratively a control cycle including the following successive phases: a phase of estimating the mass of a significant portion of each container (12); an analysis phase to compare the estimated mass with a reference mass to as to detect mass variations; a correction phase during which the pre-molding and/or drawing and/or blow molding parameters are modified based on the mass variations.
摘要:
A machine for manufacturing containers from blanks of plastic material, which includes an oven furnished with a plurality of radiation sources for heating blanks as they travel through at a predetermined speed of travel and heating profile, and a programmed control center for modifying the speed of travel and heating profile based on a temperature measurement made on a blank leaving the oven, and a pressure measurement made in the blank during a subsequent blowing.
摘要:
Method of manufacturing a container (14) from a blank (2) of thermoplastic material having a body (4) extending along a principal axis (A), which comprises: A selective heating step in which the body (4) of the blank (2) is exposed to monochromatic or pseudo-monochromatic infrared radiation, the power of which is modulated along the principal axis (A) of the body (4) in such a way that said body has alternating hot annular regions (4A, 4C, 4E, 4G, 4I), the temperature of which is far higher than the glass transition temperature (Tg) of the material, and comparatively colder annular regions (4B, 4D, 4F, 4H), the temperature of which is close to the glass transition temperature (Tg); A forming step in which a fluid under pressure is injected into the blank (2) thus heated, said step being carried out in free expansion.
摘要:
Process for manufacturing a container (2) from a plastic preform (3) by blow-molding in a mold (11), comprising: an operation of introducing the preform (3) into the mold (11); a blow-molding operation consisting of pressurizing the preform (3) by introducing a gas under a blow-molding pressure into it; a flushing operation subsequent to the blow-molding operation consisting of partially pressurizing the container (2) by introducing a gas under a flushing pressure lower than the blow-molding pressure into it; an operation of at least partial depressurization of the container down to a pressure lower than the flushing pressure, wherein this depressurization operation is subsequent to the blow-molding operation and prior to the flushing operation.
摘要:
Plastic container (1), characterized in that it comprises: a rigidified body (5), a bottom (8) extending to a lower end of the container (1) and comprising: an annular base (9) extending substantially perpendicular to the body (5) in the prolongation thereof; an annular step (10) extending from the base (9) towards the interior of the container (1), a recess (12) at the center of the bottom (8) projecting towards the interior of the container (1), a deformable annular membrane (11) in the shape of a spherical cap extending substantially perpendicular to the body (5) between the step (10) and the recess (12).
摘要:
A method of manufacturing a container having a local recessed or relief impression, from a blank (2) of thermoplastic material. The method includes a heating step in which the blank (2) is exposed to infrared radiation and in which the infrared radiation is monochromatic or pseudo-monochromatic, the intensity of which locally has an extremum in front of a localized zone (11) of the blank, in such a way as to generate a temperature extremum in the zone (11). The method also includes a forming step in which a fluid under pressure is injected into the blank (2) thus heated, and in which the recessed or relief impression is formed at the localized zone (11).
摘要:
Method of heating a blank (2) of plastic material for the manufacture of a hollow body by forming from the blank (2), which comprises the operations consisting of: inserting the blank (2) into an oven (7) provided with sources (9) of monochromatic or pseudo-monochromatic electromagnetic radiation emitting in the infrared range; exposing the blank (2) to the radiation from the sources (9), adjusted to a predetermined emission power for a predetermined exposure time; measuring a temperature on an outer wall (16) of the blank (2); Characterized in that it comprises an operation consisting of: adjusting the exposure time and/or the emission power so that said temperature at an exit from the oven (2) [sic: (7)], does not fall between Tg and 1.8·Tg, where Tg is the glass transition temperature of the material.
摘要:
A bottom (2) of a hollow body obtained by blowing or stretch-blowing a preform of a thermoplastic material. The bottom (2) includes a transverse support surface (4) and, on either side of the transverse support surface (4), a transverse outer edge (5) and a concave inner wall with a transverse central portion (10) having a pellet (11) of a low-crystallinity material. The pellet corresponds to the injection point of the perform. The bottom (2) has reinforcing ribs (1) having an outer edge (12) adjacent to the outer edge (5) of the bottom (2) as well as an inner edge (13) adjacent to the transverse central portion (10) but not reaching the transverse central portion (10). The reinforcing ribs (1) flare from their outer edge (12) toward their inner edge (13).