CN113461316A - Method for molding glass - Google Patents
Method for molding glass Download PDFInfo
- Publication number
- CN113461316A CN113461316A CN202110814754.0A CN202110814754A CN113461316A CN 113461316 A CN113461316 A CN 113461316A CN 202110814754 A CN202110814754 A CN 202110814754A CN 113461316 A CN113461316 A CN 113461316A
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- stage
- molding
- press
- glass
- preheating
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- 239000011521 glass Substances 0.000 title claims abstract description 61
- 238000000465 moulding Methods 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 238000007723 die pressing method Methods 0.000 claims abstract description 8
- 238000003825 pressing Methods 0.000 claims description 10
- 230000003749 cleanliness Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 238000007493 shaping process Methods 0.000 abstract description 3
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)
Abstract
The invention discloses a method for molding glass, which comprises the following steps: removing the outer sleeve, and directly placing the glass preform into a mold; die pressing: and preheating, forming and cooling the glass preform by a molding press. Through removing the outer sleeve of cover outside glass preform mould, it is right through the moulding press to preheat, shaping and cooling to the glass preform, the glass lens outward appearance cleanliness factor that obtains is better, and water wave, vaporific, pothole all have obvious improvement, and the depth of parallelism and the number distance of eccentricity of lens are standard, have improved product quality.
Description
Technical Field
The invention relates to the technical field of mould pressing glass, in particular to a method for mould pressing glass.
Background
The principle of the glass molding is that the glass preform is placed in a precisely processed mold by utilizing the characteristic that the viscosity of the glass is reduced along with the temperature rise, at the moment, a glass ball is solid, the glass is softened and deformed after being subjected to pressure under the condition of adequate pressure in a proper temperature environment to form the shape of a mold core, and the finished product is taken out after the glass is cooled and demoulded. The outer sleeve in the mold assembly is used to limit the height acting as a slow heat absorption rate of the stainless steel material, which affects the process efficiency.
In the process, when the mold is pressed, the heat absorption rate of stainless steel materials needs to be considered, and the outer sleeve is sleeved on the outermost side of the mold assembly and has a heat insulation effect on the inner glass preform, so that the glass softening time is increased, and the processing efficiency and the product quality are influenced;
the die is a high-precision component, and because the expansion coefficient of the outer sleeve is unstable due to the influence of high temperature in the die press, the parallelism of the die can be influenced when the height of the outer sleeve is forged, so that the eccentricity difference of a product is caused.
Disclosure of Invention
In order to solve the above technical problems, an object of the present invention is to provide a method of molding glass for improving product quality.
In order to achieve the purpose, the invention adopts the following technical scheme: a method of molding glass comprising the steps of:
removing the outer sleeve, and directly placing the glass preform into a mold;
die pressing: and preheating, forming and cooling the glass preform by a molding press.
Optionally, the preheating includes a first preheating stage, a second preheating stage and a third preheating stage;
in the first preheating stage, the molding press comprises an upper template and a lower template, and the temperatures of the upper template and the lower template are set to be 550-590 degrees; in the second preheating stage, the temperatures of the upper template and the lower template are set to be 570-610 degrees; in the third preheating stage, the temperatures of the upper template and the lower template are set to be 580-620 degrees.
Optionally, the molding comprises a first molding stage and a second molding stage;
the temperatures of the upper template and the lower template in the first molding stage are set to be 590-630 degrees; the temperatures of the upper template and the lower template in the second molding stage are set to be 600-640 degrees.
Optionally, the cooling includes a first cooling stage and a second cooling stage, and in the first cooling stage, the temperatures of the upper template and the lower template are both set to be 500 ° -540 °; in the second cooling stage, the temperatures of the upper die plate and the lower die plate are set to be 330-370 degrees.
Optionally, the molding press is an aspheric molding press.
Optionally, the focal length of the lens of the glass preform is 3.5 mm.
Optionally, the glass preform is not pressurized in the first forming stage.
Optionally, three pressurizing sections are arranged in the second molding stage, and each pressurizing section comprises a first pressurizing section, a second pressurizing section and a third pressurizing section, wherein the pressure value of the first pressurizing section is set to be 0.010-0.030m/pa, and the pressurizing time is 5.0s-10.0 s; the pressure value of the second pressurizing section is set to be 0.030-0.050m/pa, and the pressurizing time is 20.0-s30.0 s; the pressure value of the third pressurizing section is set to be 0.050-0.080m/pa, and the pressurizing time is 30.0-50.0 s.
Optionally, the pressurizing period of the first pressurizing section is 1.0s-5.0s, and the pressurizing period of the second pressurizing section is 2.0s-10.0 s; the pressurizing period of the third pressurizing section is 2.0s-10.0 s.
The invention has the beneficial effects that: the embodiment of the invention provides a method for molding glass, which comprises the following steps: removing the outer sleeve, and directly placing the glass preform into a mold; die pressing: and preheating, forming and cooling the glass preform by a molding press. Through removing the outer sleeve of cover outside glass preform mould, it is right through the moulding press to preheat, shaping and cooling to the glass preform, the glass lens outward appearance cleanliness factor that obtains is better, and water wave, vaporific, pothole all have obvious improvement, and the depth of parallelism and the number distance of eccentricity of lens are standard, have improved product quality.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is an exploded view of the internal structure of a sleep-aid pillow provided by the embodiment of the invention;
FIG. 2 is a comparison of a product without and without an outer sleeve from a method of molding glass according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method for molding glass, which is used for improving the quality of products.
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Referring to fig. 1, fig. 1 is a method for molding glass according to an embodiment of the present invention, including the following steps:
step 1: removing the outer sleeve, and directly placing the glass preform into a mold;
step 2: die pressing: and preheating, forming and cooling the glass preform by a molding press.
Specifically, the outer sleeve is removed, and the glass preform is placed in the mold, so that the operation of placing the outer sleeve on the outermost side is omitted;
and (3) a mould pressing process: because no outer sleeve influences the heat absorption rate, the time for the glass in the mold to reach the softening point is shortened, the processing time of each procedure can be shortened by 10s, and the processing time is saved; the temperature of the preheating, forming and cooling processes can be reduced by removing the outer sleeve die and heating more quickly, the temperature of each original process is reduced by 10 ℃, and the phenomena of fogging and surface depression of the glass can be avoided under the condition of overhigh temperature.
In a particular embodiment, the molding press is an aspheric molding press. The focal length of the lens of the glass preform is 3.5mm, a corresponding single-cavity die is adopted, the annular ring is sleeved in the inner sleeve, the lower die core, the glass preform and the upper die core are sequentially sleeved, and the outer sleeve is not required to be sleeved in the last step to wait for feeding.
Further, the preheating comprises a first preheating stage, a second preheating stage and a third preheating stage;
in the first preheating stage, the molding press comprises an upper template and a lower template, and the temperatures of the upper template and the lower template are set to be 550-590 degrees; in the second preheating stage, the temperatures of the upper template and the lower template are set to be 570-610 degrees; in the third preheating stage, the temperatures of the upper template and the lower template are set to be 580-620 degrees.
Further, the molding comprises a first molding stage and a second molding stage;
the temperatures of the upper template and the lower template in the first molding stage are set to be 590-630 degrees; the temperatures of the upper template and the lower template in the second molding stage are set to be 600-640 degrees.
Further, the cooling comprises a first cooling stage and a second cooling stage, wherein in the first cooling stage, the temperatures of the upper template and the lower template are set to be 500-540 degrees; in the second cooling stage, the temperatures of the upper die plate and the lower die plate are set to be 330-370 degrees.
Further, the glass preform is not pressurized in the first forming stage.
Further, three pressurizing sections are arranged in the second forming stage, wherein the three pressurizing sections comprise a first pressurizing section, a second pressurizing section and a third pressurizing section, the pressure value of the first pressurizing section is set to be 0.010-0.030m/pa, and the pressurizing time is 5.0s-10.0 s; the pressure value of the second pressurizing section is set to be 0.030-0.050m/pa, and the pressurizing time is 20.0-s30.0 s; the pressure value of the third pressurizing section is set to be 0.050-0.080m/pa, and the pressurizing time is 30.0-50.0 s.
Further, the pressurizing period of the first pressurizing section is 1.0s-5.0s, and the pressurizing period of the second pressurizing section is 2.0s-10.0 s; the pressurizing period of the third pressurizing section is 2.0s-10.0 s.
Die pressing: the machine is a gold tripod MD8-65 aspheric surface molding press, and the processing temperature is set as follows:
the first forming step is not provided with any pressure, and the second forming step is provided with three sections
Setting the forming time to be 40-70 s, the pressure maintaining period to be 3.0s, the size of the die to be 25CM, and placing the die to a feeding port for die pressing after the machine processing parameters are set.
The heat absorption rate after the outer sleeve is removed improves the process time and shortens, and the output of one process is improved.
And (3) comparison of finished products: the glass lens extruded by removing the outer sleeve has better appearance cleanliness, and water marks, fog and pits are obviously improved.
In summary, the embodiment of the present invention provides a method for molding glass, which includes the following steps: removing the outer sleeve, and directly placing the glass preform into a mold; die pressing: and preheating, forming and cooling the glass preform by a molding press. Through removing the outer sleeve of cover outside glass preform mould, it is right through the moulding press to preheat, shaping and cooling to the glass preform, the glass lens outward appearance cleanliness factor that obtains is better, and water wave, vaporific, pothole all have obvious improvement, and the depth of parallelism and the number distance of eccentricity of lens are standard, have improved product quality.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (9)
1. A method of molding glass comprising the steps of:
removing the outer sleeve, and directly placing the glass preform into a mold;
die pressing: and preheating, forming and cooling the glass preform by a molding press.
2. The method of pressing glass as in claim 1, wherein the preheating includes a first preheating stage, a second preheating stage, and a third preheating stage;
in the first preheating stage, the molding press comprises an upper template and a lower template, and the temperatures of the upper template and the lower template are set to be 550-590 degrees; in the second preheating stage, the temperatures of the upper template and the lower template are set to be 570-610 degrees; in the third preheating stage, the temperatures of the upper template and the lower template are set to be 580-620 degrees.
3. The method of pressing glass according to claim 2, wherein the forming comprises a first forming stage and a second forming stage;
the temperatures of the upper template and the lower template in the first molding stage are set to be 590-630 degrees; the temperatures of the upper template and the lower template in the second molding stage are set to be 600-640 degrees.
4. The method of press molding glass according to claim 2, wherein the cooling includes a first cooling stage in which the temperatures of the upper and lower mold plates are set to 500 ° -540 °; in the second cooling stage, the temperatures of the upper die plate and the lower die plate are set to be 330-370 degrees.
5. The method of molding glass according to claim 1, wherein the molding press is an aspheric molding press.
6. A method of press molding glass as claimed in claim 1, wherein the glass preform has a lens focal length of 3.5 mm.
7. A method of pressing glass according to claim 3, wherein the glass preform is not pressurized in the first forming stage.
8. The method of press-molding glass according to claim 3, wherein three press stages are provided in the second molding stage, including a first press stage, a second press stage and a third press stage, the first press stage being set to a pressure value of 0.010 to 0.030m/pa for a press time of 5.0s to 10.0 s; the pressure value of the second pressurizing section is set to be 0.030-0.050m/pa, and the pressurizing time is 20.0-s30.0 s; the pressure value of the third pressurizing section is set to be 0.050-0.080m/pa, and the pressurizing time is 30.0-50.0 s.
9. The method of press molding glass according to claim 8, wherein the pressing period of the first pressing section is 1.0s to 5.0s, and the pressing period of the second pressing section is 2.0s to 10.0 s; the pressurizing period of the third pressurizing section is 2.0s-10.0 s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110814754.0A CN113461316A (en) | 2021-07-19 | 2021-07-19 | Method for molding glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110814754.0A CN113461316A (en) | 2021-07-19 | 2021-07-19 | Method for molding glass |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113461316A true CN113461316A (en) | 2021-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110814754.0A Pending CN113461316A (en) | 2021-07-19 | 2021-07-19 | Method for molding glass |
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| Country | Link |
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| CN (1) | CN113461316A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001058837A (en) * | 1999-08-18 | 2001-03-06 | Matsushita Electric Ind Co Ltd | Method for molding optical element and device for molding optical element |
| CN1683264A (en) * | 2004-04-12 | 2005-10-19 | Hoya株式会社 | Process for mass-producing optical elements |
| CN106830631A (en) * | 2016-10-26 | 2017-06-13 | 宁波舜宇红外技术有限公司 | A kind of chalcogenide glass eyeglass accurate die pressing exempts from the forming method of edging |
| CN107298524A (en) * | 2017-06-08 | 2017-10-27 | 深圳市天阳谷科技发展有限公司 | A kind of major diameter non-spherical lens preparation method |
| CN107867793A (en) * | 2017-10-31 | 2018-04-03 | 广东欧珀移动通信有限公司 | Bend glass cover plate, the preparation method of bend glass cover plate and mobile terminal |
| CN109250895A (en) * | 2018-09-25 | 2019-01-22 | 成都光明光电股份有限公司 | Optical glass non-spherical surface lens moulding manufacture method and its mold |
| CN109422445A (en) * | 2017-08-23 | 2019-03-05 | 蓝思科技（长沙）有限公司 | A kind of processing method of glass bent products |
-
2021
- 2021-07-19 CN CN202110814754.0A patent/CN113461316A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001058837A (en) * | 1999-08-18 | 2001-03-06 | Matsushita Electric Ind Co Ltd | Method for molding optical element and device for molding optical element |
| CN1683264A (en) * | 2004-04-12 | 2005-10-19 | Hoya株式会社 | Process for mass-producing optical elements |
| CN106830631A (en) * | 2016-10-26 | 2017-06-13 | 宁波舜宇红外技术有限公司 | A kind of chalcogenide glass eyeglass accurate die pressing exempts from the forming method of edging |
| CN107298524A (en) * | 2017-06-08 | 2017-10-27 | 深圳市天阳谷科技发展有限公司 | A kind of major diameter non-spherical lens preparation method |
| CN109422445A (en) * | 2017-08-23 | 2019-03-05 | 蓝思科技（长沙）有限公司 | A kind of processing method of glass bent products |
| CN107867793A (en) * | 2017-10-31 | 2018-04-03 | 广东欧珀移动通信有限公司 | Bend glass cover plate, the preparation method of bend glass cover plate and mobile terminal |
| CN109250895A (en) * | 2018-09-25 | 2019-01-22 | 成都光明光电股份有限公司 | Optical glass non-spherical surface lens moulding manufacture method and its mold |
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Application publication date: 20211001 |
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| RJ01 | Rejection of invention patent application after publication |