Classifications

• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B23/00—Re-forming shaped glass
  • C03B23/0013—Re-forming shaped glass by pressing
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B11/00—Pressing molten glass or performed glass reheated to equivalent low viscosity without blowing
  • C03B11/06—Construction of plunger or mould
  • C03B11/10—Construction of plunger or mould for making hollow or semi-hollow articles
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B2215/00—Press-moulding glass
  • C03B2215/40—Product characteristics
  • C03B2215/41—Profiled surfaces
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B2215/00—Press-moulding glass
  • C03B2215/80—Simultaneous pressing of multiple products; Multiple parallel moulds

Definitions

• the technical field of the invention is that of processes for manufacturing hollow glass articles.
• Such customization of the wall of the article is also possible by modifying the forming punch digging the interior volume of the article during pressing, so that its outer wall has a pattern allowing personalization located inside the glass article to be made during the pressing step.
• the customization of a forming punch is less expensive than that of a mold.
• the marking by the forming punch does not allow the same quality of printing, and requires the customization of the entire production.
• the process described hereinafter aims to remedy all or part of the disadvantages of the state of the art and to propose a method of manufacturing a hollow glass article by pressing, simple, quality and low cost, this same if the customization concerns a limited number of articles.
• the subject of the invention is a method for manufacturing at least one hollow pressed glass article, characterized in that it comprises the following steps:
• Such a method of manufacturing at least one hollow glass article by pressing makes it possible in particular to facilitate the customization of the article during the marking step with said marking tool. Indeed, the customization of a simple marking tool is very inexpensive compared to the customization of a mold or forming punch.
• the step of marking the glass article is implemented by a marking tool independent of the forming punch improves the quality of the pattern printing while reducing the costs associated with customization.
• these two pressing and marking steps can be done in parallel.
• such a step of marking independent of the pressing step allows improved control of the production of glass articles.
• a characteristic makes it possible to implement said marking step independently. For example, it may be chosen to mark a glass article two of them during a series production of glass articles, or even for example one in three, one in four, etc.
• the pressing step makes it possible to give the glass article its overall final or final shape in a single step, this means that other forming steps such as a blowing step, for example, are not necessary. not implemented after. This is unlike a pressing step whose only function is the creation of a blank. Of course, other steps such as finishing steps can be implemented next as the marking step or a burning step that can slightly change its appearance.
• the marking step of the glass article is implemented when the glass has, in particular at an inner surface of its wall to be marked, a temperature of between 725 and 775 degrees Celsius, and preferably about 750 degrees Celsius.
• This temperature is particularly advantageous since it is large enough so that the material is soft enough to ensure the printing of the custom pattern on the glass but also low enough for the marking to be of good quality.
• a marking time of the marking step is less than 0.6 seconds and preferably less than 0.5 seconds.
• the marking time is fast enough to minimize the impact on the manufacturing time of the glass article and therefore on its manufacturing cost, without affecting the print quality of the pattern on the glass.
• the glass article after pressing in the mold, has a thickness greater than 1 mm and more preferably greater than 2 mm.
• a thickness makes it possible to obtain a glass article whose walls are thin enough to be light and have an improved design without any additional cost. vis-à-vis the raw material, this while having walls thick enough so that the marking of the glass article is of good quality without weakening it.
• the demolding step is followed by a burn step by burners.
• a burn step by burners.
• the manufacturing method is implemented for the manufacture of a plurality of glass articles, the pressing and marking steps being implemented substantially concomitantly or simultaneously for separate glass articles.
• the marking time of the marking step is less than the pressing time of the pressing step.
• the marking step is performed in masked time, when stopping the table for pressing the next glass article. This further reduces the unit manufacturing cost of a custom glass article.
• the cost of customizing a marking tool represents a cost at least twenty times lower than that of the customization of a forming punch and at least fifty times lower than that of the personalization of a marking tool. 'a mold.
• the invention also relates to a manufacturing apparatus, or manufacturing unit, of at least one glass article, the apparatus comprising at least:
• FIGS. 1A, 1B, 1C, 1D, 1E, 1F, 1G schematic views of different steps of a method of manufacturing a pressed and personalized glass article according to one embodiment of the invention
• FIGS. 2A and 2B sectional views of a hollow glass article and a part of a marking tool during two different phases of a marking step according to one embodiment of the invention
• Figure 3 is a top view of the hollow glass article and the marking tool of Figures 2A and 2B during the marking step according to this embodiment;
• FIGS. 4A and 4B sectional views of a hollow glass article and a marking tool during two different phases of a marking step according to an embodiment of the invention;
• Figure 5 is a perspective view of the marking tool according to this embodiment of Figures 4A and 4B;
• Figure 6 is a perspective view of a custom stamp of a marking tool according to one embodiment
• Figure 7 is a perspective view of a custom glass article according to this embodiment.
• FIGS. 1A, 1B, 1C, 1D, 1E, 1F, 1G illustrate schematic views of different steps of a method of manufacturing a pressed and customized glass article, according to one embodiment.
• a drop 3 of precisely calibrated molten glass is deposited in a mold 4 as illustrated by the arrow F1.
• This mold 4 is intended to shape a predetermined external shape of the article 1 into glass to make.
• This glass drop 3 also called parison, has a very precise mass, namely that of the final article 1 to manufacture.
• This pressing of the molten glass 2 against the mold is obtained by means of the forming punch 5 which is lowered by translating vertically towards the mold 4 as illustrated by the arrow F2 and which penetrates into an interior space of the mold 4 in order to give the shape in section 1 hollow glass by digging an interior volume 6.
• an inner wall of the mold 4 makes it possible to define an outer envelope to the glass article 1 to be manufactured and an outer wall of said forming punch 5 makes it possible to define an inner envelope, complementary to the outer envelope of the mold, of the article 1 to manufacture. In this way, this pressing step makes it possible to confer on glass article 1 its generally final and hollow shape.
• the mold 4 and the forming punch 5 are configured so that the article 1 made of glass, after pressing, has a thickness greater than 1 mm and more preferably greater than 2 mm.
• the glass article 1 is moved to another manufacturing station and then personalized during a marking step by a marking tool 7 independent of the forming punch 5 (see Figure 1D).
• the marking tool penetrates at least partially into the interior volume 6 of the glass article 1 and comes to print a pattern 8 in relief and / or recessed against an inner surface of a wall of said article 1 in glass, it being understood that the inner surface of the glass article is a surface of the wall of the article 1 facing the interior volume side 6.
• This marking step is illustrated in more detail in FIGS. 2A, 2B , 3 and 4A, 4B, 5.
• the marking tool 7 comprises at least one arm 70 at the end of which is positioned a personalized stamp 80, this pad 80 being removable relative to said arm 70.
• a personalized stamp 80 An example of such a custom stamp 80 is illustrated on Figure 6.
• the marking tool comprises two arms 70, in particular here arranged so as to be able each to mark the glass of a pattern 8 and that these two patterns 8 are opposed relative to each other with respect to a vertical axis of revolution X of the glass article 1 which has a symmetry of revolution.
• the marking tool 7 brings the pad or pad (s) 80 into contact with and against a surface interior of a wall of the glass article 1, such as a side wall 11 of the glass article 1, as illustrated in particular in Figures 2B and 4B.
• the marking tool 7 is configured so that the contact is simultaneous at any point of the pattern 8 so as to improve the quality of its printing. More specifically here, the marking tool 7 performs, on the one hand, a substantially vertical movement to enter (arrow F3) the distal end 72 of each arm 70 bearing a buffer 80 in the inner volume 6 of the 1 of glass, as illustrated in particular in FIGS. 2A and 4A, and, on the other hand, successively and / or at least partly concomitantly, a substantially horizontal (F4) or substantially radial movement relative to to the glass article, to mark section 1.
• the marking tool 7 lifts the end of each arm 70 out of the inner volume 6.
• the marking device comprises several arms and is arranged to print several patterns 8 on the same item 1 as is the case here, the arms 70 are controlled at the same time to minimize the marking time.
• the substantially horizontal movement of the buffer 80 is ensured by a rotation of the associated arm 70 but it could alternatively be controlled, for example, by a translation cylinder.
• the rotation of the arms 70 can be implemented by an actuating means 71, for example by the rotation of a worm or by the translation of a rack preferably aligned with the axis X, the worm or rack meshing with one or more toothed wheel (s), each of the toothed wheels being integral with an end 73 of an arm 70 opposite to the distal end 72.
• the wheel toothed then driven in rotation, causes the movement of the distal end 72 provided with the buffer 80.
• each arm 70 has at least one elbow 74 between its two ends 72, 73 and oriented outwards so as to facilitate access and the introduction of this distal end 72 into the interior volume 6 of the article 1 through its opening.
• This feature is particularly advantageous when the article must be printed with several patterns 8 and several arms 70 must be implemented. Since the manufacturing method allows a series production of glass articles 1, and the marking tool 7 evacuates the end of the arm 70 provided with the buffer 80 out of the inner volume 6 of the article 1 to each marking, it is then possible to implement a step of changing the buffer 80 of the marking tool 7 between two marking steps, without interrupting the production of glass articles.
• This buffer changing step 80 can be implemented automatically or manually. The use of the buffer 80 being sequenced, a manual change of the buffer 80 does not present any risk for an operator who would be in charge of this step.
• a safety device may also be provided to prevent actuation of the marking tool 7 when it is handled by an operator during production. Unmarked glass articles 1 can then be manufactured at the same time during the change, without interrupting or suspending the manufacture of glass articles.
• the marking tool 7 may comprise a plurality of arms of which only some are actuated, each of said arms being provided with a different buffer 80.
• the buffer changing step 80 is implemented by the choice of the desired pattern 8 and the actuation of the arm associated with the selected pattern at the time of the marking step.
• the same arm may be provided with several buffers 80, each of said buffers 80 being operable independently from each other.
• one and the same arm may have a different buffer 80 corresponding to each of the letters of the alphabet and be actuated according to a desired pattern combination 8 to form a word.
• This marking step is performed when the temperature of the glass is substantially between 725 and 775 degrees Celsius, and preferably around 750 degrees Celsius to ensure an improved print quality, this for a time a marking time of the marking step less than 0.6 seconds and preferably less than 0.5 seconds so as not to impact the manufacturing time of a glass article 1, without deteriorating the quality of personalization.
• said pad 80 stops naturally because the glass wall cools sufficiently in contact with the pad 80, preferably metal, to ensure printing of the pattern 8 quality while avoiding any deformation of the wall 11, 12 of glass when printing the pattern 8.
• Such an advantage is also particularly advantageous when the article 1 in glass, after pressing, has walls 11, 12 whose thickness is greater than 1 mm and more preferably greater than 2 mm.
• a buffer cooling device 80 may be provided (not shown).
• a cooling device may, for example, comprise a cooling circuit integrated in the buffer 80 itself, and / or also comprise one or more blowing nozzles (s) independent of the marking tool 7 and adapted (s) to direct an air jet on the pad 80 between each marking step that said marking tool 7 implements.
• the glass article 1 is cooled during a cooling step (see Figure 1E) by ventilated air then demolded, that is to say removed from its mold 4.
• Demoulding is carried out by means of a demolding tool 10 forming an ejection arm introduced through a bottom of the mold 4 to push along the arrow F5 the previously formed article 1 (see Figure 1F).
• a burn step (see FIG. 1G) by burners 9 of article 1 made of previously cooled and demolded glass makes it possible in particular to rid the glass article 1 of its possible defects and to make its glass walls smooth and shiny. In this way, the pattern thus formed on the glass is also smooth and shiny as shown in FIG. 7.
• FIGS. 1A to 1G illustrate various steps in the method of manufacturing an article 1 made of hollow glass. It is understood that the same method can be implemented in the manufacture of a plurality of hollow glass articles 1. In this case, the pressing and marking steps are implemented in such a way that substantially concomitantly or simultaneously for separate glass articles 1. More generally, all the steps are implemented concomitantly for separate glass articles 1, this to speed up the speed of production.
• the marking time of the marking step which is preferably less than 0.5 seconds, is also less than the pressing time of the pressing step. In this way, the marking step is performed in masked time, when stopping the table supporting the mold 4 for pressing the next glass article.
• the glass articles 1 are manufactured in series and in series and require the use of a suitable apparatus.
• This apparatus forming a manufacturing unit comprises at least:
• Such a device allows the successive manufacture of each of the glass articles 1.
• the apparatus forming a manufacturing unit comprises a rotary table on which are successively arranged molds 4, this rotary table being indexed.
• Each of the molds is associated with a single article 1 glass. Indeed, at each step, the mold advances and evolves in a sequenced manner making a stop time at each step, for example: before the taste, that is to say substantially to the right of a distribution channel of the apparatus, then to the right of the forming punch, then to the marking tool 7, then to the level of cooling nozzles, etc.
• the demolding tool 10 is associated with the mold 4 so that it follows the corresponding glass article 1 during its manufacture.
• the longest step requiring the most downtime is the pressing step. Therefore, the marking step is not likely to slow the production speed when performed in masked time. This in particular reduces the unit manufacturing cost of a glass article.

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• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Materials Engineering (AREA)
• Organic Chemistry (AREA)
• Manufacturing & Machinery (AREA)
• Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
• Surface Treatment Of Glass (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=55361642

Family Applications (1)

Country Status (7)

Family Cites Families (18)

• 2015
  • 2015-11-09 FR FR1560710A patent/FR3043398B1/fr active Active
• 2016
  • 2016-11-09 JP JP2018520138A patent/JP2018536611A/ja active Pending
  • 2016-11-09 EP EP16809978.6A patent/EP3374321A1/fr not_active Withdrawn
  • 2016-11-09 CN CN201680060643.2A patent/CN108349767A/zh active Pending
  • 2016-11-09 WO PCT/FR2016/052915 patent/WO2017081414A1/fr active Application Filing
  • 2016-11-09 RU RU2018113452A patent/RU2737439C2/ru active
• 2018
  • 2018-04-16 US US15/954,006 patent/US10822263B2/en active Active

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