EP3541343A1 - Procédé de fabrication de flacons de verre à tendance réduite à la délamination, sous f'effet d'un écoulement de gaz de rinçage - Google Patents

Procédé de fabrication de flacons de verre à tendance réduite à la délamination, sous f'effet d'un écoulement de gaz de rinçage

Info

Publication number
EP3541343A1
EP3541343A1 EP17797543.0A EP17797543A EP3541343A1 EP 3541343 A1 EP3541343 A1 EP 3541343A1 EP 17797543 A EP17797543 A EP 17797543A EP 3541343 A1 EP3541343 A1 EP 3541343A1
Authority
EP
European Patent Office
Prior art keywords
tube
glass
glass vial
vial
purge gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP17797543.0A
Other languages
German (de)
English (en)
Inventor
Robert Frost
Ulrich Lange
Doris Moseler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schott AG
Original Assignee
Schott AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Schott AG filed Critical Schott AG
Publication of EP3541343A1 publication Critical patent/EP3541343A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/04—Re-forming tubes or rods
    • C03B23/09—Reshaping the ends, e.g. as grooves, threads or mouths
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61J—CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE
    • A61J1/00—Containers specially adapted for medical or pharmaceutical purposes
    • A61J1/05—Containers specially adapted for medical or pharmaceutical purposes for collecting, storing or administering blood, plasma or medical fluids ; Infusion or perfusion containers
    • A61J1/06—Ampoules or carpules
    • A61J1/065—Rigid ampoules, e.g. glass ampoules
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/18—Re-forming and sealing ampoules
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
    • C03C23/0075—Cleaning of glass

Definitions

  • This invention relates to a method of making glass vials, and more particularly to a method of making vials of low delamination susceptibility under controlled conditions under the action of a purge gas flow that predominates throughout the bottom mold of the vials.
  • glass bottles of the highest quality and quality are required in medical, pharmaceutical and chemical companies today.
  • glass vials should have a very high chemical resistance to ensure the longest possible storage of their
  • the device known from EP 2 818 454 A1 of the Applicant can be used.
  • This device comprises a so-called parent machine and a downstream so-called ground machine.
  • a glass tube is first attached to a holding unit of the parent machine, which is then brought by turning the parent machine in the various processing positions to be preprocessed.
  • a locally heated end of a glass tube is separated in a separation process and the thereby forming glass vials having a closed bottom are transferred to a holding unit of the downstream floor machine where the bottoms of the glass vials are further processed at different processing positions of the floor machine.
  • various steps are taken to properly shape the glass vial bottom.
  • the glass vial bottom is then pressed into a female mold for further shaping and then cooled.
  • the filling opening is briefly blown with a gas over its entire cross section from a pipe or a nozzle, wherein the pipe or nozzle is arranged at a comparatively large distance from the filling opening and in particular outside the glass vial. for further equipment expense, for example, for a vertical
  • alkali borates, sodium and the like evaporate out of the hot glass, which immediately re-deposit on cooler regions of the glass vials, in particular in an annular zone at a certain distance from the bottom of the vial.
  • This phenomenon is known for borosilicate glasses under the name of delamination tendency and makes it difficult to ensure a constant, optimum quality of the glass vials.
  • the stoichiometric composition of the glass is also changed in the hot region near the bottom of the glass vial.
  • the machine setter can manually set and change various machine parameters to achieve and maintain both the desired geometric specifications and the desired surface specifications of the vials. The influence of these machine parameters on the susceptibility to delamination is, however, largely unknown.
  • the object of the present invention is to develop an improved process for the production of glass vials, in particular glass vials made of borosilicate glass, wherein the process in a controlled manner glass vials of constant and high quality to be produced, which significantly reduced
  • the delamination tendency should not exceed a maximum value in order to ensure a constant, high quality of the glass vials, i. without the presence of high quality outliers.
  • a method of making vials having a flat bottom and an opposing fill opening comprising: locally heating one end of a glass tube, forming a flange or roll rim with the fill opening at the locally heated end of the glass tube Separating the locally heated end of the glass tube to form a glass vial with a closed bottom, and further shaping the bottom of the vial.
  • the forming glass vial is held upside down after the separation of the locally heated end of the glass tube from the glass tube.
  • the internal volume of the vial is flushed by means of a purge gas to purge alkali borates and the like from the internal volume of the vial, the purge gas being used in further forming the bottom of the vial
  • Glass vial via the filling opening in the middle flows in and out and off-center flows in or out, so that a purge gas flow is generated in the interior of the glass vial.
  • a purge gas which in particular air, an inert gas, such as
  • Nitrogen or may be a noble gas, according to the invention generates a laminar purge gas flow inside the glass vial, which is such that the entering proportion of the purge gas flow according to the invention not (or at most negligible extent) interacts with the exiting portion of the purge gas flow, so that the exiting portion of the purge gas flow can leave the glass vial without resistance and without significant turbulence again.
  • the entering proportion of the purge gas flow according to the invention not (or at most negligible extent) interacts with the exiting portion of the purge gas flow, so that the exiting portion of the purge gas flow can leave the glass vial without resistance and without significant turbulence again.
  • the purge gas flow mentioned above causes the alkali borates and the like, which are responsible for the undesired delamination tendency, to be efficiently flushed out of the inside of the glass vial, thus producing glass vials of controlled high quality.
  • a purge gas flow is formed according to the invention, which at least during those further processing steps for further processing of the bottom of the glass vial, where the bottom of the glass vial are still deformable due to its viscosity and in which alkali borates, sodium and the like the still-hot glass exit to immediately re-deposit on cooler areas of the glass vials, permanently or continuously prevails.
  • the purge gas flow thus preferably flows continuously during the entire further shaping of the bottom of the glass vial, which should not expressly exclude a certain variation of the mass flow during individual processing steps which are carried out during further shaping of the bottom of the glass vial.
  • a tube through which the purge gas is supplied may preferably be disposed on and symmetrical to the vial centerline.
  • the purge gas flows axially or centrally into the glass vial or is suctioned off.
  • the purge gas also via an annular nozzle or the like, or via a plurality of distributed along the circumference of the filling openings arranged nozzles or pipes via the filling inlet off-center or flow out and center out or flow.
  • the tube can be operated either as a blowpipe, ie for blowing the flow into the glass vials, or as a suction tube, ie for sucking the flow out of the vials, and have various embodiments, which are described in more detail below.
  • Allen tube constellations have in common that they have at least one tube outer diameter d r , a and at least one tube inner diameter d r , i and a wall thickness, which is thus given as (d r , a -d r , i) / 2 and is sufficient to guide a purge gas under the required pressure without the flow resistance for supplying the purge gas is too high.
  • a method of manufacturing glass bottles having a flat bottom and an opposite fill opening comprising the steps of: locally heating one end of a glass tube, forming a flange or roll edge the filling opening at the locally heated end of the
  • Glass tube separating the locally heated end of the glass tube to form a glass bottle with a closed bottom, and further shaping of the bottom of the glass vial.
  • the glass vial with the closed bottom forming after the separation of the locally heated end of the glass tube from the glass tube is held upside down.
  • the further shaping of the bottom of the glass vial is at temperatures in the region of the closed bottom between 1000 ° C and 1200 ° C, more preferably at temperatures in the region of the closed bottom above of 1100 ° C, using a purge gas generates a continuous purge gas flow inside the glass vial.
  • the prevailing in the interior of the vials Spülgasströmung a deposition of vapors that emerge from the hot glass in the further shaping of the bottom of the glass vial due to the prevailing in the region of the very high temperatures of the hot glass, ie in particular of alkali borate or sodium cooler areas of the glass vials, in particular in an annular zone at a certain distance from the vial bottom, sufficiently prevented by the vapors are rinsed from the inside of the glass vials.
  • the tube through which the purge gas is injected into the interior of the vials or aspirated from the interior of the vials is a cylindrical tube, the purge gas being injected into the interior of the vials via a forward end of the tube or is sucked off.
  • the cylindrical tube has a constant wall thickness, in particular near the front end. The purge gas flow can thus be aligned and guided in a simple manner exactly parallel and coaxial with the glass vial at the front end of the tube, which assists in the formation of laminar flow conditions in the interior of the vial.
  • a cylindrical shape of the tube is particularly advantageous if the purge gas is sucked out of the interior of the glass vial, because so the purge gas can be sucked symmetrically from the filling opening, such as when the purge gas is to flow off-center into the glass vial and directed exactly centered and axially to be sucked out of the filling opening.
  • This can be achieved by an arrangement of the tube exactly parallel to the longitudinal axis of the glass vial and concentric with this.
  • the cylindrical tube further has at its front end a conically tapering outer profile.
  • the tube can therefore also be arranged closer to the filling opening for a comparable mass flow of the purge gas.
  • This shape of the front end of the tube is particularly suitable when using the tube as a blowpipe for blowing purge gas into the glass vial.
  • the tube Due to the tapering of the tube at its front end, the tube can also be immersed in the inner volume of the glass vial via the filling opening, in particular only into a head region of the glass vial, while still allowing a sufficiently uniform discharge of the purge gas, which from the inner volume of the glass Glass vial emanates again.
  • the risk of collision with the glass vial and thus damage to the glass vial is lower due to the outer profile.
  • the cylindrical tube at its front end further has a conically tapered inner profile.
  • the tapering of the inner profile results in a nozzle which makes it possible to provide a flow with a higher pressure and a smaller cross-sectional area.
  • This embodiment of the tube is particularly suitable when using the tube as a blowpipe.
  • an exact guidance of the flushing gas flow into the interior of the glass bottles and thus in a simple manner a laminar flushing gas flow can be achieved by the tapered shape.
  • the tube preferably only runs conically close to the open end, so that overall a comparatively low flow resistance can be achieved.
  • the cylindrical tube further has a section with a cylindrical inner profile at its front end. Preferably forms this section with the cylindrical inner profile directly from the outlet opening of the pipe.
  • This section may further perform the function of a nozzle, as explained above, while further aligning and guiding the exiting purge gas flow, preferably exactly coaxial with the longitudinal axis of the vial, further fostering the build-up of laminar flow within the vial.
  • the cylindrical tube at its front end further has a section with a cylindrical outer profile.
  • this section forms with the cylindrical outer profile directly from the outlet opening of the tube. He can also project with a smaller outer diameter from the rest of the tube, such as when the pipe is formed in front of it with a conically tapered outer profile.
  • the section with the cylindrical outer profile at least partially immersed in the inner volume of the glass vial, in particular only into a head region of the glass vial into it.
  • the section with the cylindrical outer profile adjoining the section with a conically tapered outer profile can nevertheless allow a sufficiently uniform discharge of the purge gas, which flows out of the inner volume of the glass vial again. Compared to tubes with a constant outer diameter, the risk of collision with the glass vial and thus damage to the glass vial is lower due to the outer profile.
  • the tube is arranged at a predetermined axial distance from the filling opening outside the glass vial. This predetermined axial distance may be another important factor for the
  • the predetermined axial distance of the tube to the filling opening is preferably in a range between 0.1 mm to 5.0 mm, more preferably in a range between 0.1 mm to 2.0 mm and more preferably in a range between 0.1 mm to 1.0 mm.
  • the front end of the tube is basically arranged as close as possible to the vicinity of the filling opening, so that no collision with the glass vial occurs at all, thus preventing damage to the glass vial.
  • the aforementioned distance of the tube to the filling opening of the glass vial does not have to be vanishing, ie greater than 0.0 mm, but in principle may also be slightly smaller than the aforementioned lower limit of 0.1 mm. Nevertheless, a sufficiently large gap ensures a uniform discharge of the purge gas flow, which flows out of the glass vial again, radially outward, without significant repercussions on the flow conditions at the front end of the tube.
  • the tube is arranged on a surface, wherein the front end of the tube is arranged at a predetermined distance to the surface, which lies in a range of 5.0 mm to 15.0 mm.
  • This surface may be the top of a chuck to which the tube is attached and which is stationary during the further bottom forming processing steps relative to the glass vial, such as a chuck or fixture, thus holding the vial bottomed during the further processing steps ,
  • the purge gas flow exiting the vial impacts this surface and must first be sufficiently radially outward directed to negatively affect the
  • this embodiment in particular for pipes having a conically tapered outer profile at its front end, if then at least the portion with the tapered outer profile of the Protruding surface, because only so the influence of the outer profile on the leadership of the exiting purge gas flow comes fully to fruition.
  • the thermal conditions in the region of the front end of the tube can be favorably influenced by the aforementioned distance of the front end of the tube to this surface.
  • the aforesaid predetermined axial distance is more preferably in a range of 6.0 mm to 12.0 mm and more preferably is at least 10.0 mm.
  • the tube outside the glass vial is arranged at a predetermined axial distance in front of the filling opening.
  • Extensive investigations by the inventors have shown that the scavenging effect decreases substantially exponentially with increasing distance of the tube from the filling opening of the glass vial or with decreasing mass flow M of the rinsing gas.
  • an arrangement of the tube outside the glass vial is basically preferred, because no complicated axial adjustment of the tube is necessary, so that in such an embodiment comparatively small distances are preferred, as stated above.
  • the rinsing effect decreases significantly with increasing tube inner diameter d r , i, since there is a lower flow velocity in relation to the cross-sectional area.
  • Investigations by the inventors have shown that the purging effect is not dependent on the tube outer diameter d r , a , as long as it is not greater than about 2/3 of the filling opening inside diameter d g , i.
  • the tube is disposed at a predetermined interval in a range of 0.1 mm to 5.0 mm.
  • particularly advantageous is an arrangement at an axial distance to the filling opening of the glass vial in a range between 0.1 mm to 2.0 mm, more preferably in a range between 0.1 mm to 1.0 mm.
  • the above embodiment is particularly advantageous because the tube must not be immersed in the glass vial (and pulled out again), so that an axial Adjustment of the tube is not required, which helps to reduce the expenditure on equipment for performing the further processing steps.
  • the tube can also dip over the filling opening a predetermined distance (A) axially into the glass vial.
  • A a predetermined distance
  • an additional immersion device or device for axial adjustment of the tube must be provided, which appropriately axially adjusted the tube for the further processing steps, in particular at a suitable time sufficiently far into the filling opening or the glass vial dives and again at another appropriate time drives back.
  • the tube in further forming the bottom of the vial, may be axially displaced according to a trajectory of the vial, such that the tube for generating purge gas flow at a respective processing station of the bottom machine dips the predetermined distance axially into the vial and advances the vial further a downstream processing station of the ground machine is moved back axially to a position outside the glass vial to release the trajectory of the glass vial.
  • the tube is thus expediently introduced into the glass vial per cycle of the rotor portion of the bottom machine, in order to carry out a respective machining operation, and executed again after execution of this machining operation.
  • the submerged position of the pipe is therefore not present over the entire cycle time of the respective machining operation.
  • the tube can in particular also be arranged in the main volume of the glass vial, that is, it can dip into the main volume of the vial until beyond a narrow neck area of the vial.
  • the tube is expediently arranged such that it has a sufficient distance from the bottom of the glass vial.
  • the predetermined distance is usually suitable to adjust.
  • the flow rate of the purge gas is chosen so that an undesirably strong cooling in the region of the bottom of the glass vial is avoided.
  • the flow rate of the purge gas can also be varied during the further processing steps for soil formation, preferably depending on the respective processing step, as explained in more detail below.
  • the glass vials are so-called narrow necked glass vials, which preferably have a neck inner diameter in the range of 6.0 mm to 13.0 mm and a neck length of not more than 12.0 mm.
  • the geometry disclosed in the present application for generating the purge gas flow is of considerable advantage, in particular in such narrow-necked glass vials, because despite the very narrow inner width of the glass vials in the region of the filling opening, a suitable purge gas flow can be generated inside the glass vials for rinsing out vapors.
  • the purge gas preferably a defined laminar and coaxial purge gas flow generated in the interior of the vial so that the alkali borates and the like are detected at the bottom of the vial first of this purge gas flow and then immediately and continuously from the vial through the filling opening of the Glass vial to be rinsed out.
  • the purge gas flow is preferably already switched on immediately before the actual separation step for separating the locally heated end of the glass tube of a glass tube, ie even before the onset of processing-intensive violent Alkaliborat- evaporation, and at least throughout the rest Forming process of the soil maintained so that a stable purge gas flow can build up already at an early stage of forming the bottoms of the vials, especially during the formation of a closed bottom when separating the locally heated end of the glass tube, and during the further processing steps for further forming the soils can not accumulate gaseous alkali borates or the like inside the glass vial and can deposit again in cooler areas.
  • the purge gas flow is additionally maintained in further process steps. In particular, this is the case in the production of larger glass vials, so glass bottles with a longer length, at the comparatively high temperatures of
  • the filling opening inner diameter d g , i, the tube outer diameter d r , a and the tube inner diameter d r , i the relation (d g , i) 2 - (d r, a) 2> (d r, i). 2
  • This ensures that the cross-sectional area of the effluent portion of the purge gas is at least as large as that of the inflow portion of the purge gas, so that sufficient purge gas can be passed into the vial and the opposing purge gas flows do not interfere with each other.
  • the wall thickness of the tube can be selected as required, but the tube outer diameter d r , a should always be smaller than the filling opening inner diameter d g , i, to allow sufficient leakage of the contaminated purge gas. Preference is given to using pipes with wall thicknesses in the range from 1.0 mm to 3.0 mm.
  • the tube inner diameter d r , i is limited down to keep the flow resistance sufficiently low, so that even at low pressure sufficiently high mass flows can be provided inside the glass vial and the low pressure at the same time the leakage currents in the gap-sealed inlet opening be kept small and limited to the top by the tube outer diameter minus the wall thickness.
  • the further shaping of the bottoms of the glass vials comprises a plurality of processing steps, wherein the mass flow of the purge gas flow in at least one of the plurality of processing steps is different from the other processing steps.
  • the mass flow of the purge gas flow entering the glass vials may suitably be in a range between 2.4 standard liters / min and 20 standard liters / min according to DIN 1343 or ISO 2533.
  • a purge gas is aspirated out of the interior of the vial through the tube, the tube being disposed at the aforesaid predetermined axial distance from the vial fill within the main volume of the vial.
  • the tube can also be immersed comparatively deep in the glass vial.
  • a vacuum system in particular in the form of a pump, generates a suitable negative pressure in order to suck the center of the flushing gas, which flows off-center into the glass vial.
  • the said vacuum system may be provided with a filter device which filters the sucked purge gas to prevent damage in the vacuum system.
  • the purge gas can be injected eccentrically through an annular nozzle or a plurality of nozzles or tubes, which are arranged distributed along the inner circumference of the filling openings of the glass vials, into the interior of the glass vials with a suitable mass flow, as stated above.
  • a further embodiment of the method of the present invention is the
  • Inner pipe diameter at least 1, 5 mm.
  • an additional, off-center acting heating power is provided, in particular by an eccentric arrangement of a plurality of gas burners, which act respectively on the bottoms of the glass vials.
  • the heating power can be suitably adapted to the mass flow of the purge gas flow to compensate for the additional cooling effect due to the purge gas flow.
  • At least one additional gas burner which in particular can be present as a node burner, generates an additional heating power, which is preferably provided centrally, and which acts on the bottom of the glass vial.
  • This additional heat output can ensure that a desired plasticity of the glass vial bottom is maintained during the entire further processing process.
  • the heating power counteracts any unwanted cooling effect of the purge gas.
  • a method of manufacturing glass vials in particular as claimed in claim 1 or claim 2 and disclosed in connection with these claims, further comprising an additional, centered on the floors the glass vial acting heating power is provided in the further shaping of the bottoms of the vials, in particular by a gas burner, which preferably acts exactly centered and perpendicular to the bottoms of the vials to a knot of plastic glass, which forms if necessary in the bottom molding, in soften sufficiently, so that this by rotation of the Glass vial and possibly further measures can be reduced and evened (hereinafter also referred to as knot burner).
  • the additional cooling effect due to the purge gas flow flowing into the interior of the glass vials can be compensated in the further shaping of the bottoms of the glass vials.
  • the cooling effect occurs essentially in the center of the forming bottom.
  • the purge gas flow flows eccentrically into the glass vials, the aforementioned cooling effect occurs essentially in an annular region near the center of the forming bottom.
  • the additional cooling effect can be sufficiently compensated if the heating power is sufficiently expanded, that is not punctiform but acts in a certain area on the forming soil, which is advantageously easier by a gas burner, in particular a so-called.
  • Knot burner Way to reach In particular, by a gas flame is also acted mechanically on the forming soil. If, for example, the purging gas flow is too strong, so that the soil would bulge up to a certain extent, this bulging can also be counteracted by the mechanical action of the gas flame.
  • this additional heating power can also vary over time, in particular be chosen differently during different processing steps in the further shaping of the bottoms of the glass vials.
  • the aforesaid gas burner is arranged and adapted to produce a gas flame acting perpendicularly or substantially perpendicularly to the bottoms of the glass vials.
  • Fig. 1 shows a schematic representation of the processing positions of the manufacturing method of a preferred embodiment of the present invention.
  • Fig. 2 shows a schematic representation of a glass vial made by a manufacturing method according to a preferred embodiment of the present invention.
  • Fig. 3a shows a schematic representation of the cylindrical tube of the manufacturing method of a preferred embodiment of the present invention.
  • FIGS. 3b to 3d show schematic representations of further examples of pipes for generating the purge gas flow according to another embodiment of the present invention.
  • Fig. 4a shows a schematic representation of the placement of a tube in front of the filling opening of a glass vial, during the manufacturing process of a preferred embodiment of the present invention.
  • Fig. 4b shows a schematic representation of the placement of a cylindrical tube in the head region of a glass vial during the manufacturing process of a preferred embodiment of the present invention.
  • FIG. 4c shows a schematic representation of placing a cylindrical tube in the main volume of a vial during the manufacturing process of one embodiment of the present invention.
  • FIGS. 5a-5d show a schematic representation of four phases of the blow-out process of the production method in a preferred embodiment of the present invention.
  • FIG. 6 shows a schematic representation of an additional gas burner of the
  • a particularly preferred embodiment of a device 1 for the production of glass vials according to the present invention is shown schematically. Shown is a so-called. Mother machine MM and a downstream so-called.
  • Both the ground machine BM and the parent machine MM consist of a rotor portion and a stator portion, wherein the rotor portions rotate once around its own axis during a production cycle.
  • a flange or rolling rim is formed with the filling opening at the locally heated end of the glass tube. Furthermore, the separation of the locally heated end of the glass tube takes place to form a closed bottom.
  • the spatially mutually spaced processing positions of the ground machine BM serve the further
  • Step 7 a removal step 8 and an empty step 9.
  • the glass vials 100 are kept upside down.
  • the Glass vials 100 are clocked in the ground machine BM by means of the rotor portion from an upstream processing position to a downstream processing position along a predetermined trajectory.
  • Ground machine BM is always at the same height level.
  • one end of a glass tube is locally heated, in particular by means of gas burners, and formed by locally heating the end of a glass tube, a flange or rolling edge with the filling opening at the locally heated end of the glass tube. Furthermore, the separation of the locally heated end of the glass tube takes place to form a closed bottom.
  • the resulting glass vials 100 whose neck is already formed and whose bottom is heated, are first of a
  • the bottoms of the glass vials 100 are processed with at least one burner to roughly form the bottoms of the vials;
  • the bottoms of the glass vials 100 are further processed with at least one burner to make the bottoms of the vials 100 flat;
  • the bottoms of the vials 100 are further processed with at least one burner to further refine the already formed bottoms of the vials 100;
  • the bottoms of the glass vials 100 are pressed into a mold matrix by applying a relatively high gas pressure (preferably 0.5 to 3.0 bar) to finally form the bottoms;
  • the bottoms of the glass vials 100 are cooled
  • the finished glass vials 100 are removed from the bottom machine BM.
  • the holding unit of the bottom machine is empty in order to receive a new glass vial 100 in the next step.
  • the bottoms of the glass vials 100 are relatively plastic, in particular in steps 2-5 (but also in step 6), ie they have a relatively low viscosity.
  • the further shaping of the bottoms of the glass vial is expediently carried out at temperatures in the region of the closed
  • Soil between 1000 ° C and 1200 ° C, more preferably at temperatures in the range of the closed soil above 1100 ° C.
  • static static pressure is generated inside the vial in some known methods.
  • Soil Forming 2-5 (but also 6) permanently applied purge gas flow which flows through the interior of the glass vials, as stated below, in addition to clean the glass vials in a controlled manner of resulting Alkaliboraten and counteract delamination.
  • a glass vial 100 as a product of the manufacturing method according to the present invention is shown schematically.
  • the glass vial has a flat bottom, a cylindrical, smooth side wall, a tapered neck portion, a constricted neck portion thereafter, and an upper end having a filler opening and a flange having a rolled edge or an integrally formed one
  • the glass vial has an overall height h g , the vial main segment having a height h v , and wherein the vial head segment has a height hk, and wherein the glass vial rolling edge has a height h r .
  • the glass vial 100 has a filler opening outer diameter d g , a and a filler opening inner diameter d g , i. In the middle
  • FIG. 2 In the region of the glass vial bottom, a knot-shaped region of glass is shown in FIG. 2, which can arise during the separating step 2 and is degraded and evened out in the subsequent bottom forming steps 3-5 in order to form a flat bottom.
  • Fig. 3a shows a particularly preferred embodiment of the tube 200 for injecting or aspirating the purge gas, which is used in the manufacturing process wherein the tube 200 according to this embodiment is formed as a cylindrical tube 210 having a front open end.
  • the cylindrical tube 210 has a constant tube outer diameter d r , a , a constant tube inner diameter d r , i and a constant tube wall thickness d r , a .
  • the cylindrical tube 210 may be arranged particularly with respect to a holding unit of the ground machine BM to suck or suck out a purge gas into a glass vial 100.
  • the tube wall thickness d r , a of the cylindrical, open-topped tube 210 may vary.
  • Fig. 3b is another embodiment of the tube is shown, which is used in a further embodiment of the manufacturing method, wherein the tube 220 is formed according to this embodiment as a tube with a tapered and tapered end. More specifically, the tube 220 has a tapered tube inner diameter d r , i, wherein the tube outer diameter d r , a is constant over substantially the entire length of the tube, but tapers near the front end. The length over which the pipe inner diameter d r , i decreases is considerably greater than the length over which the pipe outer diameter d r , a decreases.
  • purge gas streams having a higher pressure can be produced with such a pipe 220, since the conically tapering and tapered end of the pipe 220 forms a total of a nozzle.
  • the purge gas portion flowing out of the interior of the vial can efficiently flow out on the outer surface of the tube 220. Because the pipe inner diameter d r , i over the largest part of the pipe 220 is comparatively large, a comparatively low flow resistance in the pipe 220 can be achieved overall, which allows considerable advantages in the mechanical realization, in particular requires no complicated sealing measures.
  • Fig. 3c shows another embodiment of the tube in which the length over which the tube outer diameter d r , a decreases, is equal to the length in the embodiment of Fig. 3b, but the length over which the Pipe inner diameter d r , i reduced, is significantly smaller.
  • the purge gas flow in this embodiment is less gentle to a purge gas flow with a lesser Diameter shaped. However, this may be enough. In this case, the same advantages, as described above for the embodiment according to FIG. 3b, continue.
  • a cylindrical section may be formed at the outlet opening of the tube 220, as shown in FIGS. 3 b and 3 c.
  • Fig. 3d shows a further embodiment of the tube, in which this cylindrical portion is extended at the front end by means of a sleeve having an inner diameter d r , d in the axial direction, in order to form the emerging purge gas flow suitable. Also in this embodiment, the same advantages, as described above for the embodiment of FIG. 3b, continue.
  • a placement of the tube 200 is shown in the manufacturing process, in which the tube 200 is disposed at a predetermined distance A in front of the filling opening and outside of the glass vial 100.
  • the tube 200 does not penetrate into the glass vial 100 during the manufacturing process 1, and therefore, can be immovably positioned with respect to a holding unit of the ground machine BM.
  • the tube 200 In order to provide an optimum purge gas flow in the vial, the tube 200 must not be too far from the fill port since in that case an insufficient mass flow M of the purge gas flow 50 would be provided.
  • the predetermined axial distance A to the filling opening may in particular be in a range between 0.1 mm to 5.0 mm, more preferably in a range between 0.1 mm to 2.0 mm, but more preferably in a range between 0, 1 mm to 1.0 mm. In any case, the predetermined axial distance A to the filling opening is greater than 0.0 mm, so not disappearing.
  • the tube 200 may in particular be designed as described above with reference to FIGS. 3 a to 3 d by way of example.
  • Adjustment device for the axial adjustment of the tube 200 required.
  • a fixed position of the tube 200 outside of the glass vial 100 is enabled.
  • the pipe 200 does not need to be retracted into the glass vial 100 at each cycle of the rotor portion of the ground machine BM and extended again, which can considerably simplify the further shaping of the bottom of the glass vial 100.
  • the tube 200 is mounted on a surface, such as a chuck having a planar surface, with the forward end of the tube 200 being at a predetermined distance from the surface, which is within a range of 5 , 0 mm to 15.0 mm.
  • This surface is stationary during the further processing steps for bottom forming relative to the glass vial 100, for example to a chuck or a holder, whereby the glass vial is held during the further processing steps for bottom forming.
  • the chuck or the holder in the ground machine BM rotates along the path of movement along the path of movement at the processing stations of the ground machine BM in synchronism with the respective associated glass vial.
  • the flushing gas flow emerging from the glass vial impacts this surface and must first be sufficiently directed radially outward in order to avoid an undesirable influence on the flow conditions inside the glass vial but also in the vicinity of the filling opening. This can be easily adjusted by suitable choice of the distance of the front end of the tube to this surface.
  • This embodiment is particularly advantageous for tubes which have a conically tapering outer profile at their front end, if then at least the section with the conically tapered outer profile protrudes from the surface, in particular by a length in the range of 5.0 mm to 15.0 mm, more preferably in a range of 6.0 mm to 12.0 mm, and more preferably at most 10.0 mm.
  • FIG. 4b shows a further preferred placement of the tube 200 in the production method, in which the tube 200 for generating the purge gas flow is arranged in the head region of the glass vial.
  • the tube 200 must be inserted into the glass vial 100 to some extent, necessitating an additional immersion device that axially displaces the tube 200 and dips into the vial.
  • the tube 200 is expediently introduced in each case per cycle of the rotor portion of the bottom machine BM by axial adjustment in the glass vial 100 to produce the aforementioned purge gas flow inside the vial, and again by axial adjustment after performing the respective processing operation on the processing station is performed.
  • the submerged position of the tube 200 is thus not present over the entire cycle time at the respective processing station of the ground machine BM.
  • a further preferred placement of the tube 200 is shown in the manufacturing process, in which the tube 200 is immersed into the main volume of the glass vial 100.
  • the front end of the tube 200 (or the nozzle) should have a sufficient distance from the bottom of the glass vial 100 so that the bottom is not over-cooled by the purge gas or even touched.
  • the previously described immersion device is necessary to axially displace the tube 200 and immerse it in the vial.
  • the tube 200 is expediently introduced in each case per cycle of the rotor portion of the bottom machine BM by axial adjustment in the glass vial 100 to produce the aforementioned purge gas flow inside the vial, and again by axial adjustment after performing the respective processing operation on the processing station is performed.
  • the submerged position of the tube 200 is thus not present over the entire cycle time at the respective processing station of the ground machine BM.
  • FIGS. 5a-5d show four phases of a rinsing process of the production method according to the present invention.
  • the individual phases are described during the further shaping of the bottoms of the glass vials:
  • first phase 10 Start of the rinsing process, wherein in this phase, first a purge gas flow 50 is built up inside the glass container 100, and wherein thereby flowing out of the pipe 200 purge gas with an adequate pressure into the interior of the glass vial 100 is blown, so that this incoming Purging gas flow portion 51 initially presses against the hot gas 54 at the bottom of the glass container 100.
  • the start of the rinsing process is preferably carried out already during the separation of the locally heated end of the glass tube, ie in Fig. 1 at the position 2, or shortly before.
  • second phase 20 (see Fig. 5b): forming a purifying Spülgasströmungs- portion 52, wherein this purifying Spülgasströmungs portion 52 between the hot gas 54 at the bottom of the glass container 100 and the incoming Spülgasströmungs- portion 51 in the vicinity of the glass vial Soil forms semicircular.
  • This phase begins immediately after the first phase 10, which depends in particular on the pressure of the inflowing purge gas and the geometric conditions in the vicinity of the front end of the tube and the filling opening.
  • This phase can be used in particular in the transition between the processing steps 2 and 3 in FIG.
  • third phase 30 (see Fig. 5c): Forming an exiting Spülgasströmungs- portion 53, said emerging purge gas flow portion 53 minimally interacts with the incoming purge gas flow portion 51 and the purifying Spülgasströmungs- portion 52 and in particular forms no turbulence, so that the contaminated, hot purge gas 54 is blown out or sucked out of the glass vial 100.
  • This phase can in particular begin for the processing step 3 in FIG. 1 and stop during the entire processing steps 3-6, whereby the mass flow of the purge gas can also be varied between the individual processing steps 3-6.
  • fourth phase 40 terminate the rinse process, wherein the pressure of the inflowing purge gas 50 is reduced and the last impurities are rinsed out of the glass vial 100 out.
  • the onset of the rinsing process can either be initiated at the beginning of the separating step 2 (see Fig. 1) or shortly before.
  • the rinsing process is preferably maintained continuously, wherein the respective pressure of the rinsing gas 50 in the individual steps can certainly also be adapted and varied over time in order to achieve an overall optimum rinsing effect.
  • the rinse process is terminated at the beginning of the template bottom forming step 6.
  • the glass vial bottom will still be so hot that even alkali borates will evaporate at the bottom, so that in this case maintenance of the purge gas flow 50 is necessary even during the bottom cooling step 7.
  • the cooling effect of purge gas 50 may well be desirable in this scenario.
  • the supplied mass flow of the purge gas serves to cover the inner surface of the glass vial evenly. It must therefore be theoretically proportional to the circumference, ie proportional to the pipe diameter. In addition, it must flow sufficiently fast along the wall of the glass vial and have a sufficient layer thickness in order to absorb and dissipate all vaporizing alkali borates and other components.
  • the mass flows used are dependent on the processes at the individual processing stations, since during the bottom forming always the required supporting effect must be achieved, the cooling effect should not exceed a certain degree.
  • the table below shows possible values, the mass flows in standard liters / min (nl / min) according to ISO 2533 are given:
  • MFC numbers refer to the machining positions 2 to 5 in Fig. 1.
  • MFC 6 refers to the machining position 6 in Fig. 1 (die bottom forming step).
  • the mounting distance of the pipe refers to the distance of the front end of the blowpipe above a flat surface, in this case above a fodder bottom, on which the
  • Blowpipe is fixedly mounted relative to the associated glass vial in the bottom machine.
  • a sufficiently large mounting distance ensures the backflow of the purge gas a piece of free axial path until it can be directed radially outward.
  • This mounting distance should always be chosen as small as possible, is preferably in a range of 5.0 mm to 15.0 mm, more preferably in a range of
  • the mass flows used primarily depend on the diameter of the vial and the diameter of the orifice.
  • the above table also shows preferred ratios and absolute values of the mass flows to the respective phases of the further soil tillage.
  • the mass flow of the purge gas flow entering the glass vials expediently lies in a range between 2.4 standard liters / min and 20 standard liters / min according to ISO 2533, a maximum value of 20 nl / min preferably not being exceeded.
  • FIG. 6 shows a further embodiment of the production method in which an additional heating power in the form of a gas flame 310 on the outside of the glass vial bottom is provided by at least one additional gas burner 300 during further shaping of the bottoms of the vials.
  • the gas flame 310 can act in particular perpendicularly on the glass vial bottom in order to keep the glass vial bottom sufficiently hot and plastic, and thereby in particular to counteract the cooling effect of the rinsing gas 50 in the interior of the vial.
  • the additional gas burner 300 is preferably arranged centrally above the bottom 110 of the glass vial 100 and directs the gas flame 310 centrally and coaxially on the floor 110, so that a possibly thickened bottom area formed there (also known as a node) is sufficiently heated so that it by further measures, in particular a rapid rotation of the vial, can be reduced and thereby the bottom of the vial can be formed evenly and with uniform thickness while maintaining very close tolerances.
  • a possibly thickened bottom area formed there also known as a node
  • a further embodiment can be provided to compensate for an additional cooling effect due to the purge gas flow in the further shaping of the bottoms of the glass vials at least partially an additional, off-center heating power, in particular by an eccentric arrangement of a plurality of gas burners, which at a respective Processing station are arranged distributed around the outer circumference of the glass vials around, preferably at equal angular intervals to each other, and each acting on the bottoms of the glass vials.

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  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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  • Pharmacology & Pharmacy (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)

Abstract

L'invention concerne un procédé de fabrication de flacons de verre ayant un fond plat et une ouverture de remplissage située à l'opposé, selon lequel le fond du flacons de verre est façonné plus avant en plusieurs positions de façonnage. Au cours de la poursuite du façonnage du fond, dans le but de réduire les effets de la délamination, un écoulement de gaz de rinçage est produit à l'intérieur des flacons au moyen d'un gaz de rinçage qui entre et est expulsé de manière centrée par l'intermédiaire de l'ouverture de remplissage et/ou entre et est expulsé de manière excentrée par l'intermédiaire de l'ouverture de remplissage. L'injection ou l'aspiration du gaz de rinçage s'effectue au moyen d'un tube ou d'une buse. L'invention concerne divers géométries et agencements du tube ou de la buse. L'invention concerne également une pluralité de constellations géométriques du diamètre du tube et divers réglages du flux massique.
EP17797543.0A 2016-11-16 2017-10-24 Procédé de fabrication de flacons de verre à tendance réduite à la délamination, sous f'effet d'un écoulement de gaz de rinçage Withdrawn EP3541343A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016122061.2A DE102016122061A1 (de) 2016-11-16 2016-11-16 Verfahren zur Herstellung von Glasfläschchen mit geringer Delaminationsneigung unter der Einwirkung einer Spülgasströmung
PCT/EP2017/077114 WO2018091234A1 (fr) 2016-11-16 2017-10-24 Procédé de fabrication de flacons de verre à tendance réduite à la délamination, sous f'effet d'un écoulement de gaz de rinçage

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EP3541343A1 true EP3541343A1 (fr) 2019-09-25

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US (1) US20190263707A1 (fr)
EP (1) EP3541343A1 (fr)
CN (1) CN110177535A (fr)
BR (1) BR112019009763A2 (fr)
DE (1) DE102016122061A1 (fr)
MX (1) MX2019005562A (fr)
WO (1) WO2018091234A1 (fr)

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US11420893B2 (en) 2017-11-30 2022-08-23 Corning Incorporated Systems and methods for minimizing SHR from piercing during pharmaceutical part converting using a gas flow
US11186513B2 (en) * 2017-11-30 2021-11-30 Corning Incorporated Systems and methods for minimizing SHR from pharmaceutical part converting using negative pressure evacuation
US10968133B2 (en) 2017-11-30 2021-04-06 Corning Incorporated Methods for minimizing SHR in glass articles by producing a gas flow during pharmaceutical part converting
US11339079B2 (en) 2017-11-30 2022-05-24 Corning Incorporated Systems and methods for minimizing SHR from pharmaceutical part converting using pulsed ejection
DE102018101840A1 (de) * 2018-01-26 2019-08-01 Schott Ag Heißformgebungsvorrichtung zur Herstellung von Glasbehältnissen aus einem Glasrohr
DE102018101842A1 (de) * 2018-01-26 2019-08-01 Schott Schweiz Ag Heißformgebungsvorrichtung zur Herstellung von Glasbehältnissen aus einem Glasrohr
US20210187497A1 (en) * 2019-12-20 2021-06-24 Schott Ag Glass container comprising a glass bottom with improved properties
DE102021105613A1 (de) * 2021-03-09 2022-09-15 Nipro Corporation Brenner, Gerät und Verfahren zur Bearbeitung eines Glasbehälters

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CN110177535A (zh) 2019-08-27
WO2018091234A1 (fr) 2018-05-24
MX2019005562A (es) 2019-08-12
US20190263707A1 (en) 2019-08-29
DE102016122061A1 (de) 2018-05-17
BR112019009763A2 (pt) 2019-08-13

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