CN110395886A - A kind of molding method of 3D bend glass heat suction - Google Patents
A kind of molding method of 3D bend glass heat suction Download PDFInfo
- Publication number
- CN110395886A CN110395886A CN201810374502.9A CN201810374502A CN110395886A CN 110395886 A CN110395886 A CN 110395886A CN 201810374502 A CN201810374502 A CN 201810374502A CN 110395886 A CN110395886 A CN 110395886A
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- Prior art keywords
- mold
- glass
- vacuum
- glass plate
- temperature
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Classifications
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- 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
- C03B23/035—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending
- C03B23/0352—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet
- C03B23/0357—Re-forming glass sheets by bending using a gas cushion or by changing gas pressure, e.g. by applying vacuum or blowing for supporting the glass while bending by suction or blowing out for providing the deformation force to bend the glass sheet by suction without blowing, e.g. with vacuum or by venturi effect
Abstract
The invention discloses a kind of 3D bend glass heat to inhale molding method, and 2D glass plate, which is placed on top, 3D curve pocket, and bottom is provided in the mold of the open cavity of the special construction of absorption；Then mold is heated by heating plate；When glass is by thermal softening and close softening, by being vacuumized from below to heating cavity, to form pull of vacuum to 2D glass plate；Then again the cooling mold of vacuum pressure maintaining and glass complete 3D bend glass heat and inhale molding until the dimensionally stable of glass no longer changes.Even air hole distribution on mold is made full use of, so that pull of vacuum is uniform, is suitble to the curved surface of the various complexity of molding, only unilateral mold, and graphite jig does not melt with glass phase, demoulding is simple；Heat inhales temperature and is higher than hot pressing temperature, and glass is smaller for the loss of mold closer to softening point；Due to the uniformity that Vacuum Heat is inhaled, can be obviously increased with the double holes of a mould or cratered molding, efficiency.
Description
Technical field
The invention belongs to glass production field, in particular to a kind of 3D bend glass heat inhales molding method.
Background technique
3D bend glass has many advantages, such as that frivolous, transparent cleaning, anti-fingerprint, anti-dazzle, weatherability are good, can promote intelligence
Energy end product novel appearance and the experience of better touch-control feel, it is even more important that glass material compares metal material
With better signal reception.
It is formed at present for the 3D bend glass of intelligent terminal, main molding mode is by way of contact hot pressing
It is laminated with male model master mold in temperature appropriate (generally between heat transfer point and softening point), makes planar glass substrate
Molding mode manufactures 3D bend glass in into the space between master mold and male model.The size of bend glass is by male model master mold
The machining accuracy of itself, mutually matched size, geometric tolerance and external agency provide uniform pressure to guarantee.Male and female
The mode of mould pressurization needs upper and lower mould or three template dies, high to the required precision of mold body, in addition to board pressuring machine itself
The pressure stability of structure, structure size stability requirement is high, and parts machining itself and assembly error, and provides pressure
Temperature distortion of drive module material etc. can all cause the dimensional discrepancy of the female in-molded 3D bend glass of male model to increase, in addition,
The mode of male model master mold pressurization contacts 3D bend glass concave surface with mold with convex surface, increases subsequent for two sides throwing
The difficulty of light；And the mode that feature die cooperation squeezes is also not suitable for the complicated curved surface of molding；The requirement of above-mentioned pressing and forming complexity
Cause the yields of 3D curved surface forming low.
Summary of the invention
The present invention provides a kind of 3D bend glass heat to inhale molding method, it is intended that overcoming 3D in the prior art
The production process of glass, it is complicated for operation, it is not high using the hot-forming yield of male model master mold, and larger problem is lost in mold.
A kind of molding method of 3D bend glass heat suction, comprising the following steps:
Step 1: 2D glass plate being placed on equipped in 3D shaped recesses surface mold, the mold bottom is with saturating
The material layer of gas micropore；
Step 2: the 2D glass plate and mold being arranged in heating chamber, so that the 2D glass plate is heated to 3D glass
Glass forms softening temperature；
Step 3: extracting vacuum from heating chamber bottom, form vacuum power in heating cavity, vacuum power is from mold bottom
Micropore pass through, act on softening after 2D glass sheet lower surface so that 2D glass plate fits in the 3D shaped recesses table of mold
Face forms 3D glassware；
The stomata having using mold body, so that vacuum power passes through mold and is applied on glass plate, without opening up individually
Stomata, realize simple, uniformity is high, and consistency is high；
While making the 3D glassware and mold reach forming temperature, continue to extract vacuum, so that heating cavity
The 3D glassware is kept the 3D shaped recesses surface for being fitted in the mold by interior vacuum power；
Step 4: stopping extracting vacuum, and the 3D glassware is carried out to be cooled to cooling temperature, realize 3D glass heat
Roll forming.
Further, during being heated to the 2D glass plate and applying vacuum power, two are included at least not
With the application stage of intensity vacuum power, and the time for applying vacuum power is at least 20s.
The vacuum power that first stage applies is greater than the vacuum power that follow-up phase applies, it is also possible to what the intermediate stage applied
Vacuum power is maximum.
Further, at least one stage parameter is adjusted, the shape of the 3D glassware is controlled.
Further, the stage parameter, including each stage vacuum power size, apply the vacuum power time, softening temperature,
Forming temperature and cooling temperature.
Further, the value range of the softening temperature is 800 DEG C -950 DEG C.
Further, the mold bottom is offered into honeycomb reinforcing rib.
Adsorptivity and gas permeability are promoted, pull of vacuum is increased, honeycomb structure, which plays, reinforces mold overall structural strength
Effect, while the cavity than emptying completely has better heat transfer effect；
Further, silicon carbide agglomerated material of the mold by static pressure graphite material or with gap is made.
Further, the inside and outside cavity of the heating cavity is made of high temperature resistant stainless steel material, in heating cavity
Heating plate is made of carbofrax material.
Further, insulating is provided with outside the heating cavity.
99.999% nitrogen is full of in the heating cavity and mold, to extend mold, heating plate and inside cavity material
Service life.
Before the 2D glass plate is placed on the mold, the 2D glass plate and mold are preheated.
While the 3D glassware and mold to be put into progress cooling on the steel plate for be connected with cooling water, moving back
The period continues to heat mold using low-power between flame range, and then the 3D glassware and mold are put into cold water again
It is cooling.
In the annealing section period by being heated among heating chamber, and simultaneously to heating chamber bottom coohng, i.e. heating
Uniformly, prevent temperature from dropping too fast to guarantee that temperature is stablized in cooling.
Beneficial effect
The present invention provides a kind of 3D bend glass heat to inhale molding method, and select has special construction characteristic first
Operation is used as mold, realizes the function that curved surface forming can be realized merely with unilateral mold, reduces upper/lower die cooperation and adds
It is reduced costs in the requirement of work, material and processing technology；Secondly, creative proposes to provide in the form of vacuum suction
Pressure eliminates the high-precision pressure mechanism of hot-forming needs and relevant pressure controls and detection feedback system, drop
The low difficulty of cost and manufacture；Using the negative pressure value of atmosphere, more evenly, the precision of formed product is easier to protect glass stress
Card, improves the yield of product；In addition heat inhales formed glass only with mold progress single-contact, reduces the scuffing of glass, with
And subsequent polishing treatment is more convenient.Even air hole distribution on graphite material mold, pull of vacuum is uniform, is suitble to molding various multiple
Miscellaneous curved surface, only unilateral mold, and graphite jig does not melt with glass phase, demoulding is simple；The contactless absorption glass of vacuum,
Uniform force, negative pressure of vacuum size can be adjusted according to demand by pressure controller, thickness of glass size more evenly, compared with hot pressing
Size is more stable；Heat inhales temperature and is higher than hot pressing temperature, and glass is smaller for the loss of mold closer to softening point；Due to true
The uniformity that empty heat is inhaled can be obviously improved with the double holes of a mould or cratered molding, efficiency；Due to the mechanism of single mold, operation letter
It is single, it is easy to accomplish the loading and unloading and cleaning of glass and die automation.
Detailed description of the invention
Fig. 1 is that 3D bend glass heat inhales forming method schematic illustration；
Fig. 2 is that 3D bend glass heat inhales forming method principle diagrammatic cross-section；
Fig. 3 is planar glass substrate, mold, heating plate and vacuum interface diagrammatic cross-section；
Label declaration: 1- insulating, the upper heating plate of 2-, 3- chamber outer wall, 4- temperature detection thermocouple, under 5- plus
Hot plate, 6- heat vacuumize interface, hot plate supporting block under 7-, 8- mold, the molding 3D bend glass of 9-, 10- cavity inner wall, 11-
2D glass plate, 12- mould upstream curve pocket, 13 be upper chamber A, the 14- mould that 2D glass plate and mould upstream curved surface are formed
Has the lower cavity B of bottom open cavity and the formation of lower heating plate upper surface.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described further.
3D bend glass heat of the present invention inhales molding method, is that 2D glass plate 11 is placed on to top to have 3D bent
Face pit 12, bottom are provided in the mold 8 of the open cavity of the special construction of absorption；Then by heating plate to mold
It is heated；When glass is by thermal softening and close softening, by being vacuumized from below to heating cavity, thus to 2D glass
Under the cavity A13 and mold bottom open cavity and lower heating plate upper surface that 3D curve pocket is formed in plate and mold are formed
Portion cavity B14, which is vacuumized, reaches specified time；Then vacuum pressure maintaining cools down mold and glass again, until the dimensionally stable of glass
No longer change, i.e. completion 3D bend glass heat inhales molding.
Detailed process the following steps are included:
Step 1: 2D glass plate being placed on equipped in 3D shaped recesses surface mold, the mold bottom is with saturating
The material layer of gas micropore；
In this example, a kind of fine grain granularity, high-purity high-density degree are selected, stomata containing micro-aperture has certain stomata
Rate, high thermal conductivity and thermal stability isostatic pressing formed graphite material (other similar material, as silicon carbide can also be using) are as mold material
Material；
Step 2: the 2D glass plate and mold being arranged in heating chamber, so that the 2D glass plate is heated to 3D glass
Glass forms softening temperature；
Step 3: extracting vacuum from heating chamber bottom, form vacuum power in heating cavity, vacuum power is from mold bottom
Micropore pass through, act on softening after 2D glass sheet lower surface so that 2D glass plate fits in the 3D shaped recesses table of mold
Face forms 3D glassware；
While making the 3D glassware and mold reach forming temperature, continue to extract vacuum, so that heating cavity
The 3D glassware is kept the 3D shaped recesses surface for being fitted in the mold by interior vacuum power；
As shown in Figure 1-Figure 3, the heating chamber can use the composite structure form of upper heating plate 2 and lower heating plate 5,
During heating, the real-time monitoring of temperature is carried out by the way that temperature detection thermocouple 4 in upper and lower heating plate is arranged in, control adds
Hot temperature；
Heat vacuumizes interface 6 and is arranged in lower heating plate bottom；And the cavity with heat insulation and preservation effect is arranged in heating chamber
In, the heat-insulating heat-preserving materials such as the use of chamber outer wall 3 similar ceramic fiber blanket (plate), nanometer blanket or special nano coating, cavity
Inner wall 10 considers thermal expansion deformation and anti-oxidant, using special stainless steel or imported material, such as SUS430/310S/
316 and Inconel 601 etc.；Insulating 1 is also filled between heating chamber and cavity inner wall；And the heating cavity
It is made of carbofrax material.
99.999% nitrogen is full of in the heating cavity and mold, to extend mold, heating plate and inside cavity material
Service life.
Step 4: stopping extracting vacuum, and the 3D glassware is carried out to be cooled to cooling temperature, realize 3D glass heat
Roll forming.
Cooling procedure includes two sections, and one is annealing section, and one is completely cooling section；
While the 3D glassware and mold to be put into progress cooling on the steel plate for be connected with cooling water, moving back
The period continues to heat mold using low-power between flame range, and then the 3D glassware and mold are put into cold water again
It is cooling.
In the annealing section period by being heated among heating chamber, and simultaneously to heating chamber bottom coohng, i.e. heating
Uniformly, prevent temperature from dropping too fast to guarantee that temperature is stablized in cooling.
During being heated to the 2D glass plate and applying vacuum power, it is true to include at least two varying strengths
The application stage of empty power, and the time for applying vacuum power is at least 20s.
The vacuum power that first stage applies is greater than the vacuum power that follow-up phase applies, it is also possible to what the intermediate stage applied
Vacuum power is maximum.
For example, being adsorbed in the first stage with 2D glass plate of the vacuum power of -90KPA to softening, it is bonded mold, is changed
Become glass sheet shape, until shape is completely bonded with 3D shaped recesses surface completely；In second stage, lesser vacuum is used
Power carries out vacuum pressure maintaining to the glass after deformation；
For example, pre-suction is carried out to the 2D glass plate after softening with the vacuum power of -85KPA in the first stage, to glass plate
Shape is tentatively changed；In vacuum power of the second stage greater than -90KPA, so that glass plate is fitted in completely with 3D shape
The die surface of shape, reduces vacuum power in the phase III, carries out vacuum pressure maintaining to glass, so that 3D glass forms, is formed
3D bend glass 9；
In forming process, by changing the stage parameter of each stage parameter, the shape of the 3D glassware is controlled.
The stage parameter, including each stage vacuum power size, apply the vacuum power time, softening temperature, forming temperature with
And cooling temperature.
For example, the value range of the softening temperature is 800 DEG C -950 DEG C, wanted for different glasswares and molding
It asks, changes the value of the temperature, adapt to the demand of each glassware.Such as 870 DEG C of glass forming temperature, vacuum time 50s is inhaled,
Vacuum pressure -95Kpa.
In actual operation, the mold bottom can also be offered honeycomb reinforcing rib.
Adsorptivity and gas permeability are promoted, pull of vacuum is increased, honeycomb structure, which plays, reinforces mold overall structural strength
Effect, while the cavity than emptying completely has better heat transfer effect；
If before the 2D glass plate is placed on the mold, being preheated to the 2D glass plate and mold, also
The hot bending shape time can be further decreased, processing efficiency is improved.
Claims (10)
1. a kind of 3D bend glass heat inhales molding method, which comprises the following steps:
Step 1: 2D glass plate being placed on equipped in 3D shaped recesses surface mold, the mold bottom is with breathable microporous
Material layer；
Step 2: the 2D glass plate and mold being arranged in heating chamber, so that the 2D glass plate is heated to the molding of 3D glass
Softening temperature；
Step 3: extracting vacuum from heating chamber bottom, form vacuum power in heating cavity, vacuum power is from micro- on mold bottom
Hole passes through, the 2D glass sheet lower surface after acting on softening, so that 2D glass plate fits in the 3D shaped recesses surface of mold, shape
At 3D glassware；
While making the 3D glassware and mold reach forming temperature, continue to extract vacuum, so that heating chamber is intracorporal
The 3D glassware is kept the 3D shaped recesses surface for being fitted in the mold by vacuum power；
Step 4: stop extracting vacuum, and the 3D glassware be cooled to cooling temperature, realize 3D glass bending at
Type.
2. the method according to claim 1, wherein being heated to the 2D glass plate and applying vacuum power
During, including at least the application stage of two varying strength vacuum powers, and the time for applying vacuum power is at least 20s.
3. according to the method described in claim 2, controlling the 3D glass it is characterized in that, adjust at least one stage parameter
The shape of product.
4. according to the method described in claim 3, it is characterized in that, the stage parameter, including each stage vacuum power size, apply
Add vacuum power time, softening temperature, forming temperature and cooling temperature.
5. according to the method described in claim 4, it is characterized in that, the value range of the softening temperature is 800 DEG C -950 DEG C.
6. the method according to claim 1, wherein the mold bottom is offered honeycomb reinforcing rib.
7. method according to claim 1-6, which is characterized in that the mold is for static pressure graphite material or with sky
The silicon carbide agglomerated material of gap is made.
8. according to the method described in claim 9, it is characterized in that, the inside and outside cavity of the heating cavity is that high temperature resistant is stainless
Steel material is made, and the heating plate in heating cavity is made of carbofrax material.
9. according to the method described in claim 8, it is characterized in that, being provided with insulating outside the heating cavity.
10. the method according to claim 1, wherein before the 2D glass plate is placed on the mold,
The 2D glass plate and mold are preheated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810374502.9A CN110395886A (en) | 2018-04-24 | 2018-04-24 | A kind of molding method of 3D bend glass heat suction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810374502.9A CN110395886A (en) | 2018-04-24 | 2018-04-24 | A kind of molding method of 3D bend glass heat suction |
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| CN110395886A true CN110395886A (en) | 2019-11-01 |
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ID=68321918
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810374502.9A Pending CN110395886A (en) | 2018-04-24 | 2018-04-24 | A kind of molding method of 3D bend glass heat suction |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111018341A (en) * | 2019-12-24 | 2020-04-17 | 中国建筑材料科学研究总院有限公司 | Method and device for preparing fiber bundle blank plate |
| CN112358170A (en) * | 2020-11-12 | 2021-02-12 | 科立视材料科技有限公司 | 3D glass forming device and preparation method of 3D glass |
| CN113666618A (en) * | 2021-09-29 | 2021-11-19 | 芜湖长信科技股份有限公司 | 3D glass hot bending forming vacuum adsorption structure |
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| JPS61227931A (en) * | 1985-04-02 | 1986-10-11 | Nippon Sheet Glass Co Ltd | Forming device for glass article |
| CN102083759A (en) * | 2008-07-02 | 2011-06-01 | 康宁股份有限公司 | Method of making shaped glass articles |
| CN102892721A (en) * | 2010-05-12 | 2013-01-23 | 肖特公开股份有限公司 | Method for manufacturing molded glass articles, and use of the glass articles manufactured according to the method |
| CN204874276U (en) * | 2015-08-05 | 2015-12-16 | 东莞市冲宝模具有限公司 | Ventilative formula curved surface glass forming device |
-
2018
- 2018-04-24 CN CN201810374502.9A patent/CN110395886A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61227931A (en) * | 1985-04-02 | 1986-10-11 | Nippon Sheet Glass Co Ltd | Forming device for glass article |
| CN102083759A (en) * | 2008-07-02 | 2011-06-01 | 康宁股份有限公司 | Method of making shaped glass articles |
| CN102892721A (en) * | 2010-05-12 | 2013-01-23 | 肖特公开股份有限公司 | Method for manufacturing molded glass articles, and use of the glass articles manufactured according to the method |
| CN204874276U (en) * | 2015-08-05 | 2015-12-16 | 东莞市冲宝模具有限公司 | Ventilative formula curved surface glass forming device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111018341A (en) * | 2019-12-24 | 2020-04-17 | 中国建筑材料科学研究总院有限公司 | Method and device for preparing fiber bundle blank plate |
| CN111018341B (en) * | 2019-12-24 | 2022-10-25 | 中国建筑材料科学研究总院有限公司 | Method and device for preparing fiber bundle blank plate |
| CN112358170A (en) * | 2020-11-12 | 2021-02-12 | 科立视材料科技有限公司 | 3D glass forming device and preparation method of 3D glass |
| CN113666618A (en) * | 2021-09-29 | 2021-11-19 | 芜湖长信科技股份有限公司 | 3D glass hot bending forming vacuum adsorption structure |
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