EP4619349A1 - Umformvorrichtung und verfahren zum umformen eines glasrohlings - Google Patents
Umformvorrichtung und verfahren zum umformen eines glasrohlingsInfo
- Publication number
- EP4619349A1 EP4619349A1 EP23782417.2A EP23782417A EP4619349A1 EP 4619349 A1 EP4619349 A1 EP 4619349A1 EP 23782417 A EP23782417 A EP 23782417A EP 4619349 A1 EP4619349 A1 EP 4619349A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tempering
- unit
- temperature
- period
- heating
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/0307—Press-bending involving applying local or additional heating, cooling or insulating means
-
- 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
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/0235—Re-forming glass sheets by bending involving applying local or additional heating, cooling or insulating means
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/0302—Re-forming glass sheets by bending by press-bending between shaping moulds between opposing full-face shaping moulds
Definitions
- the invention relates to a forming device and a method for forming a glass blank, in particular a volume blank and/or a thin glass.
- Forming devices and methods for forming glass blanks are generally known. Forming devices are usually set up to first heat the glass blank to a forming temperature in one or more stages and then to form the glass blank. The formed glass blank can be cooled in a further station.
- Tempering and forming can be either isothermal or non-isothermal.
- the mold performing the forming is at substantially the same temperature as the glass blank.
- the glass blank is usually already provided in the mold, which is successively moved through the various stages of the forming device so that the mold and the glass blank are heated together, resulting in both units being at substantially the same temperature.
- the temperature of the mold differs from the temperature of the glass blank. For example, the glass blank can be heated independently of the mold and then passed to the mold for forming.
- US 2017/0349472 A1 discloses a device for forming curved glass.
- KR 101845746 B1 discloses a molding system for lenses.
- KR 102019 0 109075 A discloses a molding device for curved plates.
- CN 107365063 A discloses a hot-pressing device for three-dimensional protective glasses for mobile terminals.
- JP 2002154836 A discloses a bending device for bending glass plates to produce curved mirrors.
- the object mentioned at the outset is achieved by a forming device for forming, preferably for isothermal forming, a glass blank, in particular a volume blank and/or a thin glass, comprising a first station and a second station for tempering and/or forming the glass blank, wherein the first station has a first tempering unit and/or the second station has a second tempering unit, which are arranged and designed to temper a transfer unit holding the glass blank to a predefined temperature within a tempering period, a control device which is signal-coupled to the first tempering unit and/or the second tempering unit and which is set up to set the first tempering unit and/or the second tempering unit with a tempering process parameter, wherein the control device is set up to change the tempering process parameter within the tempering period such that the transfer unit can be tempered with a predefined temperature profile.
- the invention is based on the knowledge that quality defects in formed glass blanks arise when the transfer units are heated too much at the beginning of heating at a single station and/or cooled too much during cooling.
- sudden thermal stress can lead to internal stresses and unfavorable thermal expansion and, accordingly, to cracks, deformations and wear on the glass and mold or tool. This can cause thermal shocks, among other things, and the quality of the glass can decrease.
- unfavorable tempering can have a negative effect on stress birefringence. In general, it has been found that unfavorable tempering causes defects of varying magnitude of shape deviation, such as deviations in roughness, waviness and profile.
- the individual tempering stations usually always have the same temperature, for example 400°C.
- the transfer unit is heated with a high temperature gradient, since the temperature difference between the station and the transfer unit is high.
- the invention is based on the finding that at the beginning of the tempering period, for example, the transfer unit or the glass blank is initially acted upon with a low heating power and the heating power is then increased. This leads to better glass quality and a stable forming process.
- the forming device is designed to form a glass blank. Forming can be understood as, for example, a change in geometry and/or bending.
- the forming device can be designed to form solid glass and/or thin glass.
- the forming device can be designed for pressing, in particular for forming solid glass, press bending, molding, countersinking and/or deep drawing, in particular for forming thin glass.
- the forming device is preferably designed for isothermal forming of the glass blank, so that the glass blank and the mold have essentially the same temperature.
- the glass blank is, for example, a preform blank that already meets high requirements for weight tolerance and surface quality.
- the glass blank can, for example, be a volume blank.
- a volume blank can, for example, be a spherical, cylindrical, lens-shaped or conical geometry.
- the glass blank can be a thin glass that is characterized by the fact that it has a thickness orthogonal to a planar extension that is many times less than the planar Extension. Formed thin glasses are used, for example, as screen covers for smartphones.
- the forming device comprises the first station and the second station for tempering and/or forming the glass blank.
- the forming device can have a first station for tempering and a second station for forming the glass blank.
- the station for tempering the glass blank can, for example, be arranged in the process direction before the station for forming the glass blank.
- the station for tempering the glass blank can be arranged behind the station for forming, for example for cooling.
- a station is understood to mean, in particular, a section of the forming device in which the transfer unit with the glass blank remains for a predetermined time during the process.
- the transfer unit with the glass blank remains at a single station during the tempering period.
- a station can have one, two or more units for carrying out the forming, for example pressing and/or tempering.
- press stamps other
- Tempering elements for example for convective heating, oxygen traps to prevent unwanted oxidation, sensors and the like can be arranged.
- the tempering time depends on the process and depends, for example, on the molds used, the glass blanks and/or the number of stations. A thin glass blank often requires a shorter tempering time than a volume blank.
- the tempering time is preferably between 0.5 minutes and 10 minutes, in particular between one minute and four minutes.
- the tempering unit is arranged and designed such that the transfer unit can be arranged on it.
- the tempering unit can have a tempering surface on which the transfer unit can be arranged. It is particularly preferred that the tempering surface is aligned substantially horizontally during normal operation so that the transfer unit can be arranged on it.
- the tempering surface can also have positioning elements in order to position the transfer unit on the tempering surface in a predetermined position.
- the transfer unit is arranged and designed to hold the glass blank. Holding the glass blank can be understood to mean any positioning of the glass blank. This can be done, for example, by means of a force-fitting and/or form-fitting connection.
- the glass blank can be arranged in a lower mold of the transfer unit.
- the transfer unit is preferably a mold with an upper and/or lower mold.
- the transfer unit has a cavity, in particular a first, lower cavity and/or a second, upper cavity.
- the glass blank can be arranged in particular within the cavity.
- the first cavity can be formed by a first mold unit of a mold and/or the second cavity by a second mold unit of a or the mold.
- the first and/or the second mold unit can be guided by means of an outer sleeve.
- the transfer unit is further arranged and designed to be moved from the first station to the second station by means of a feed unit.
- the transfer unit can have coupling elements, for example.
- the forming device further comprises a control device which is signal-coupled to the first tempering unit and/or the second tempering unit and which is set up to set the first tempering unit and/or the second tempering unit with a tempering process parameter.
- the control device is set up to set the first tempering unit and the second tempering unit each with a tempering process parameter.
- the control device can set the first tempering unit with a first tempering process parameter and the second tempering unit with a second tempering process parameter. Setting can also be understood as controlling and/or regulating.
- the tempering process parameter can be continuously set and thus changed.
- the control device can also be a computing unit.
- the tempering process parameter is understood to mean in particular any adjustable parameter that influences the tempering of the transfer unit.
- the tempering process parameter can directly or indirectly affect a temperature and/or a heating output of the tempering unit.
- a first target temperature of the first tempering unit and/or a second target temperature of the second tempering unit can be set, wherein for heating the glass blank, the first initial temperature is lower than the first target temperature and/or the second initial temperature is lower than the second target temperature. Furthermore, it is preferred that for cooling the glass blank, the first initial temperature is higher than the first target temperature and/or the second initial temperature is higher than the second target temperature.
- the P parameter of the controller unit is generally known as the proportional component and is also referred to as the controller gain.
- controller unit can have an I parameter and/or a D parameter, whereby these can also be designed to be variable.
- controller units are also referred to as P, PI, PD or PID controllers.
- the tempering process parameter relates to a temperature and/or a pressure.
- This temperature and/or this pressure can be that of a tempering unit, the glass blank and/or a tempering element that acts on the glass blank.
- a further preferred embodiment of the forming device is characterized in that the tempering process parameter is a temperature of the Transfer unit and/or a tempering element acting on the glass blank, wherein the predefined temperature depends on a point in time within the tempering period.
- the tempering process parameter relates to a tempering pressure with which the tempering element acts on the glass blank, wherein the tempering pressure depends on a point in time within the tempering period.
- the tempering pressure depends on a point in time within the tempering period. The greater the pressure of the tempering element, the greater the heat transfer to the glass blank.
- the tempering pressure should not exceed a predetermined pressure, as the glass blank could be damaged or destroyed.
- the tempering pressure is provided in an oscillating manner. It is preferred that the temperature is increased, in particular for heating, and reduced for cooling. It is further preferred that the tempering pressure is adjusted, in particular increased.
- a further preferred development of the forming device is characterized in that the control device is set up such that the tempering process parameter is adjusted such that in a first time period of the tempering period the temperature rises or falls with a first temperature gradient and in a second time period of the tempering period following the first time period the temperature rises or falls with a second temperature gradient, wherein the second temperature gradient is greater than the first temperature gradient.
- control device is set up such that the tempering process parameter is set such that in a first time period of the tempering period, the tempering pressure has a first pressure value and in a second time period following the first time period, the tempering pressure has a second pressure value, wherein the second pressure value is greater than the first pressure value. Due to the increasing Temperature of the glass blank, a higher tempering pressure can be applied in the second time period, so that better tempering is possible.
- a further preferred embodiment of the forming device is characterized in that the first tempering unit and/or the second tempering unit has heating elements that can be controlled separately by the control device and the control device is set up to control the heating elements in such a way that the first tempering unit and/or the second tempering unit has or have a predefined temperature distribution.
- Separately controllable heating elements are to be understood in particular as meaning that they can be controlled individually.
- a lower heating power is provided in a central section of a temperature control unit than in an outer section surrounding the central section.
- the outer section usually loses more heat than the central section, so that such a control enables a more homogeneous temperature distribution and thus better heating of the transfer unit.
- a further preferred embodiment of the forming device is characterized in that the first tempering unit and/or the second tempering unit has or have a cooling unit which is or are arranged and designed to cool the first tempering unit and/or the second tempering unit.
- the tempering unit can be cooled to a predetermined temperature, for example at the end of the tempering period or before the tempering period. This may be necessary, for example, to achieve the temperature profile described above or to enable a short cycle time.
- control device is set up to heat a core of the first tempering unit and/or the second tempering unit more strongly in a first time period of the tempering period than a core surrounding the core. Outer section so that the heat is transported from the core to the outer section to avoid thermal shock.
- control device is configured to cool the core with the cooling unit in a second time period of the tempering period following the first time period, so that heat is transported from the outer portion to the transfer unit and cooling of the first tempering unit and/or the second tempering unit is ensured after the tempering period has elapsed.
- control device is set up to cool a core of the first tempering unit and/or the second tempering unit more strongly than an outer section surrounding the core in a first time section of the tempering period.
- the cycle time is influenced, among other things, by how quickly the tempering unit can be cooled down again after the tempering period in order to accommodate another transfer unit with a low initial temperature.
- the core of the tempering unit is cooled again before the end of the tempering period. Due to the mass of the tempering unit, cooling the core does not immediately lead to cooling of the tempering surface and thus to cooling of the transfer unit. However, this prior cooling of the core leads to a subsequent faster cooling of the entire tempering unit, so that the cooling time between two consecutive tempering periods is reduced.
- the first tempering unit and/or the second tempering unit has a heating unit, preferably with an inductive heating element.
- the heating unit and the cooling unit are integrally formed, wherein the transfer unit can be arranged on the cooling unit, so that heat provided by the heating unit is transferred through the cooling unit to the transfer unit.
- the heating unit can have the heating element described above, and the cooling unit can be present.
- cooling can also be carried out by means of convection, for example by supplying a gaseous cooling medium or a thermal oil.
- the heating unit has an upper side for arranging the transfer unit and that a or the heating element is arranged on a lower side of the heating unit facing away from the upper side.
- a heat-conducting intermediate layer is arranged between the cooling unit and the heating unit in order to conduct heat to the transfer unit during normal operation.
- the heating unit has two or more heating elements that are at least partially enclosed by a heating ring.
- the heating unit can have two or more heating elements arranged parallel to one another, for example heating cartridges.
- the heating ring can also be designed, for example, in the form of a heating cartridge or as a heating channel with a heating fluid.
- the heating ring encloses the other heating elements at least partially or essentially completely. This arrangement prevents an outer section from having a lower temperature than a middle section of the heating unit or the temperature control unit, since the outer section generally requires a higher heating output than the core or the middle section, since the outer section has a higher heat loss.
- the heating unit has two or more heating rings, which are arranged, for example, as heating coils.
- the heating cartridges can be optional.
- a further preferred embodiment of the forming device comprises a fluid unit for causing a flow of a tempering fluid contained in two or more cavities of the cooling unit, wherein the control device is designed to control the fluid unit in such a way that between two successive tempering periods the tempering fluid is cooled against a A tempering fluid of lower temperature is exchanged so that rapid cooling of the first tempering unit and/or the second tempering unit is possible.
- the fluid unit is fluidically coupled to a fluid container in which the fluid, in particular the low-temperature tempering fluid, is stored.
- the fluid container can be designed to temper the tempering fluid, in particular to cool it.
- the tempering fluid is provided in a central section of the cooling unit and flows from the central section in a star shape towards an outer section. Between two consecutive tempering periods can also mean that at the end of a tempering period or at the beginning of another tempering period, the tempering fluid is exchanged for the low-temperature tempering fluid.
- a further preferred embodiment of the forming device comprises a process chamber surrounded by a wall in which the first station and the second station are arranged, a transfer opening within the wall for introducing and/or removing the transfer unit into or from the process chamber, a movable lock element for opening and closing the transfer opening, which can be guided along the wall, wherein a volume-controllable sealing element acts between the wall and the lock element.
- the process space can be sealed more securely, reducing or preventing the loss of nitrogen and the entry of oxygen to reduce mold wear.
- the volume-controllable sealing element can be designed to be inflatable, for example.
- the sealing element has an interior space that is fluidically coupled to a fluid supply unit, so that a sealing fluid can be introduced into the sealing element in order to inflate it.
- This has the advantage that when the transfer opening is closed, the sealing element has a high volume and thus securely closes the transfer opening.
- the volume-controllable sealing element can have a small volume in order to reduce or avoid wear on the sealing element.
- a further preferred development of the forming device is characterized in that it comprises a fastening plate that can be coupled to the transfer unit, wherein a press stamp that can be coupled to the fastening plate for effecting a pressing force has a cavity through which a cooling fluid can flow in order to cool the press stamp.
- the coupling between the transfer unit and the mounting plate can be achieved, for example, by arranging the transfer unit on the mounting plate.
- a cooled press ram has the advantage that it has reduced thermal displacement. Furthermore, sealing surfaces are less likely to be damaged.
- the forming device comprises a feed unit which is arranged and designed to move the transfer unit from the first station to the second station.
- the feed unit preferably comprises an electric motor to move the transfer unit.
- a first initial temperature of the first tempering unit and/or a second initial temperature of the second tempering unit is set at a start of the tempering period. It is also preferred that at an end of the tempering period, a first target temperature of the first tempering unit and/or a second target temperature of the second tempering unit is set. For heating, it is also preferred that the first initial temperature is lower than the first target temperature and/or the second initial temperature is lower than the second target temperature. For cooling, it is also preferred that the first initial temperature is higher than the first target temperature and/or the second initial temperature is higher than the second target temperature.
- a first P value is set in a first time period of the tempering period and a second P value is set in a second time period of the tempering period following the first time period, wherein the second P value is higher than the first P value.
- a core of the first tempering unit and/or the second tempering unit is heated more than an outer section surrounding the core, so that heat is transported from the core into the outer section. It is also preferred that in a second time period of the tempering period following the first time period, the core is cooled with the cooling unit, so that heat is transported from the outer section of the transfer unit and cooling of the first tempering unit and/or the second tempering unit is ensured after the tempering period has elapsed.
- a tempering fluid of the cooling unit is exchanged for a tempering fluid of lower temperature, so that rapid cooling of the first tempering unit and/or the second tempering unit is possible.
- Figure 1 a schematic, two-dimensional view of an exemplary
- Figure 2 a schematic, two-dimensional view of another exemplary embodiment of a forming device
- Figure 3 a schematic, two-dimensional view of an exemplary
- Figure 4 a schematic, two-dimensional view of an exemplary
- Figure 5 a schematic, two-dimensional view of an exemplary
- Figure 6 another schematic, two-dimensional view of an exemplary embodiment of a first transfer opening
- Figure 7 a schematic, two-dimensional view of a pressing unit
- Figure 8 a schematic, two-dimensional view of an exemplary embodiment of a press piston
- Figure 9 a schematic, two-dimensional view of a
- Figure 10 another schematic, two-dimensional view of a
- Figure 11 a schematic, two-dimensional view of an exemplary
- Figure 12 a schematic view of an exemplary process.
- Figures 1 and 2 show a forming device 1 in whose process chamber 2 a first station 4, a second station 5, a third station 6 and a fourth station 8 are arranged.
- the forming device 1 comprises a first transfer opening 10 through which the transfer units 28 enter the process chamber 2.
- the first transfer opening 10 is connected to a first lock element 12 can be closed, wherein this is arranged to be movable in the vertical direction in order to release the first transfer opening 10.
- the forming device 1 has the second transfer opening 14 through which the transfer units 28 can be led out of the process space 2 again.
- the second transfer opening 14 can be opened and closed with the second lock element 16.
- a tempering unit 18, 38, 40, 42 is arranged at each station 4-8.
- the tempering units 18, 38-42 are arranged and designed to temper a transfer unit 28 holding the glass blank 36 to a predefined temperature within a tempering period.
- the first station 4 and the second station 5 are provided for heating the glass blank 36.
- they are arranged and heated on a tempering surface of the tempering units 18, 38-42 with the transfer unit 28 designed as a mold.
- the tempering unit 18 is shown with a lower tempering unit 18a and an upper tempering unit 18b.
- the other tempering units 38-42 can also have upper tempering units in an analogous manner.
- the control device 134 is coupled to the tempering units 18, 38-42 by means of signals.
- the control device 134 is set up to adjust the tempering units 18, 38-42 with a tempering process parameter.
- the tempering process parameter can be a P value, for example.
- the tempering process parameter can be a temperature of the transfer unit 28 or the glass blank 36.
- the tempering process parameter can be a tempering pressure.
- the control device 134 is further configured to change the tempering process parameter within the tempering time period such that the transfer unit 28 can be tempered with a predefined temperature profile.
- the first tempering unit 18 has, analogously to the other tempering units 38-42, a heating unit 20 and heating elements 22 embedded therein, for example heating cartridges. Furthermore, the first tempering unit 18 comprises an insulating plate 24 and a cooling unit 26.
- the heating unit 20 forms, among other things, the tempering surface on which the transfer unit 28 can be arranged in the intended operation of the tempering.
- the insulating plate 24 is arranged between the cooling unit 26 and the heating unit 20.
- the transfer unit 28 has a lower mold 30 and an upper mold 32. Furthermore, a centering sleeve 34 is provided around the mold 30, 32. In addition, a further handling sleeve (not shown) is usually provided around the centering sleeve.
- the insulating plate 24 may not be provided and instead only the heating unit 20 and the cooling unit 26 may be provided.
- the cooling unit 26 may form the tempering surface and the heating unit 20 may be arranged on a surface of the cooling unit 26 arranged opposite the tempering surface, so that the heat transfer from the heating unit 20 to the transfer unit 28 takes place through the cooling unit.
- FIG. 3 shows a detailed view of the heating unit 20.
- the heating unit 20 comprises a heating plate 54.
- Heating cartridges 56 are embedded in the heating plate 54.
- heating channels 58 can be embedded in the heating plate 54, through which, for example, a thermal oil flows.
- a heating ring 60 is arranged adjacent to an outer edge of the heating plate 54.
- the heating ring 60 can be designed either in the form of a heating cartridge or as a heating channel through which a thermal oil flows.
- the transfer unit 28 can advantageously be tempered, since this enables a particularly homogeneous heat provision.
- the heating ring 60 offers better heat distribution, since the edge areas of heating plates 54 are usually cooler.
- FIG. 4 shows a detailed view of a preferred embodiment of a cooling unit 26.
- the cooling unit 26 comprises a cooling plate 48 which has a central coolant inlet 50 and cooling channels 52 extending in a star shape from the coolant inlet 50.
- a cooling channel 53 simulating the outer contour of the cooling plate 48 is provided around the star-shaped cooling channels 52.
- Such a cooling unit 26 has the advantage that a cold cooling fluid can be provided through the central coolant inlet 50 before the end of the tempering period, which, however, only flows slowly in the direction of the outer cooling channel 53 when controlled accordingly. It is therefore possible for the cooling unit 26 to cool the inner core of the cooling plate 48 before the end of the tempering period, but for the transfer unit 28 arranged on the cooling plate 48 to continue to be heated.
- Figure 5 shows a detailed illustration of the first transfer opening 10 with the first lock element 12.
- the first transfer opening 10 is arranged within a process chamber wall 62 of the process chamber 2.
- the first lock element 12 is guided on the process chamber wall 62 by means of a first guide rail 64 and a second guide rail 66.
- the first lock element 12 has a first sealing recess 68 and a second sealing recess 72.
- the sealing recesses 68, 72 can be designed as a groove and preferably form a circumferential groove.
- Volume-controllable sealing elements 70, 74 are arranged in the sealing recesses 68, 72.
- a single volume-controllable sealing element can also be arranged, which can be arranged circumferentially, for example, as shown in Figure 6.
- Figure 7 shows a forming unit which is usually arranged outside the process chamber 2 and whose press piston 46 passes through the process chamber wall 62 and can act there on the transfer unit 28 or the mold by means of the fastening plate 44.
- the forming unit has an electric motor 86, which can be designed as a servo motor, for example.
- the electric motor 86 is connected to a threaded spindle 84 and above that to a spindle nut 88.
- the spindle nut 88 is positively connected to the hollow shaft 90, so that the spindle nut 88 can be moved up or down by rotating the threaded spindle 84. This also allows the hollow shaft 90 to move vertically.
- the hollow shaft 90 is in turn coupled to the guide carriage 76.
- the guide carriage 76 is guided by a first linear guide 78 and a second linear guide 80, so that it can be moved vertically with high precision.
- the guide carriage 76 is connected to the press piston 46.
- the electric motor 86 and the linear guides 78, 80 are arranged on the frame 82 of the forming unit.
- Figure 8 shows a preferred embodiment of the press piston 46.
- This comprises a piston housing 92 which has a cavity.
- the fluid sleeve 94 which has a fluid inlet 96, is arranged in this cavity.
- a fluid can thus flow through the fluid inlet 102 into the fluid inlet 96.
- the length of the fluid sleeve 94 is selected such that it leaves a gap between the outlet and the bottom of the piston housing. The fluid can thus exit from the fluid sleeve 94 at this end and flow into the cavity or the fluid outlet 98 of the piston housing 92. From there, it can flow out through the fluid outlet 100.
- This enables a press piston 46 that is continuously cooled, so that the high temperatures in the process chamber 2 do not lead to any expansion and/or deformation of the press piston 46 that disrupts the process.
- FIGS 9 and 10 show a feed unit 104 which is arranged and designed to move the transfer unit 28 through the process chamber 2 from one station to the next station.
- the feed unit 104 comprises an electric motor 106 which is mechanically coupled to a threaded spindle 114 by means of a coupling 108.
- the threaded spindle 114 is mounted on bearing blocks 110, 116.
- a spindle nut 112 is arranged on the threaded spindle 114.
- the spindle nut 112 is connected in the translational direction to a connecting element 126.
- the connecting element 126 is in turn rotatably coupled to a feed rod 122 via a bearing block 120.
- a rotary movement of the threaded spindle 114 thus causes a feed movement 124 of the linear guide rail 118.
- the transfer unit 28 can thus be moved through the process space 2.
- FIG 11 shows a possible embodiment of a tempering unit 18.
- the tempering unit comprises the heating unit 20 with heating elements 22, an insulating plate 24 and the cooling unit 26.
- the unit consisting of the heating unit 20, insulating plate 24 and cooling unit 26 is connected to the fastening plate 44 via threaded rods 138.
- the transfer unit 28 is arranged below the heating unit 20. A force is exerted on the transfer unit 28 by a vertical downward movement of the press piston 46 in Figure 11, so that the upper cavity of the transfer unit 28 is pressed downward and the glass blank 36 is formed.
- FIG 12 shows a schematic method.
- a transfer unit 28 holding the glass blank 36 is tempered to a predefined temperature with a tempering unit 18, 38-42 within a tempering period.
- the glass blank 36 is moved between two consecutive tempering periods with the transfer unit 28 from the first station 4 to the second station 5.
- step 202 the tempering unit 18, 38-42 is set with a tempering process parameter that is changed within the tempering time period such that the transfer unit 28 is tempered with a predefined temperature profile.
- Setting the transfer unit 28 can also be a control and/or regulation.
- the forming device 1 described above and the corresponding method enable better forming of glass blanks 36.
- the improvement consists in particular in the fact that the tempering units 18, 38-42 are not tempered to a fixed temperature, but the tempering of the transfer unit 28 is adjustable.
- Process chamber wall first guide rail second guide rail first sealing recess first volume-controllable sealing element second sealing recess second volume-controllable sealing element
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- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022130329.2A DE102022130329A1 (de) | 2022-11-16 | 2022-11-16 | Umformvorrichtung und Verfahren zum Umformen eines Glasrohlings |
| PCT/DE2023/100705 WO2024104522A1 (de) | 2022-11-16 | 2023-09-22 | Umformvorrichtung und verfahren zum umformen eines glasrohlings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4619349A1 true EP4619349A1 (de) | 2025-09-24 |
Family
ID=88236653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23782417.2A Pending EP4619349A1 (de) | 2022-11-16 | 2023-09-22 | Umformvorrichtung und verfahren zum umformen eines glasrohlings |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4619349A1 (de) |
| DE (1) | DE102022130329A1 (de) |
| WO (1) | WO2024104522A1 (de) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3887163B2 (ja) * | 2000-11-10 | 2007-02-28 | 株式会社ホンダロック | 曲面ミラー用ガラス素材の曲げ成形装置 |
| KR102157751B1 (ko) * | 2013-02-20 | 2020-09-21 | 코닝 인코포레이티드 | 성형 유리 물품을 형성하는 방법 및 시스템 |
| KR101697158B1 (ko) * | 2014-12-19 | 2017-01-17 | 삼성전자주식회사 | 글래스 곡면 성형장치 및 이를 이용한 글래스 곡면 성형방법 |
| US11136255B2 (en) * | 2015-06-16 | 2021-10-05 | Corning Incorporated | Systems and methods for thermally controlling warp |
| KR101845746B1 (ko) * | 2016-11-17 | 2018-04-05 | 아이오솔루션(주) | 하중을 이용한 렌즈 성형 시스템 |
| CN107365063A (zh) * | 2017-09-06 | 2017-11-21 | 广东省智能机器人研究院 | 一种智能高良率移动终端3d防护玻璃罩热压成型装置 |
| KR102485312B1 (ko) * | 2018-03-16 | 2023-01-06 | 삼성전자주식회사 | 곡면을 포함하는 플레이트 성형 장치 |
| DE102020126664A1 (de) * | 2020-10-12 | 2022-04-14 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Umformvorrichtung zur Herstellung von Glasprodukten und Verfahren |
-
2022
- 2022-11-16 DE DE102022130329.2A patent/DE102022130329A1/de active Pending
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2023
- 2023-09-22 WO PCT/DE2023/100705 patent/WO2024104522A1/de not_active Ceased
- 2023-09-22 EP EP23782417.2A patent/EP4619349A1/de active Pending
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| Publication number | Publication date |
|---|---|
| WO2024104522A1 (de) | 2024-05-23 |
| DE102022130329A1 (de) | 2024-05-16 |
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