CN116239288A - Preparation method and device of 3D glass crater structure, 3D glass and preparation method - Google Patents

Abstract

The application provides a preparation method and device of a 3D glass volcanic vent structure, 3D glass and a preparation method, and relates to the technical field of 3D glass cover plates. The preparation method comprises the following steps: heating a mold containing a glass plate to a softening point temperature of the glass plate; pressing the die at a constant speed under the condition of heat preservation; adopting a combined cooling mode of short temperature annealing and step annealing to cool; wherein, the reduction temperature annealing means: annealing at 100 ℃ within 20-60 s. The method adopts a combined cooling mode of short temperature annealing and step annealing to cool down, and releases the surface stress of the glass, thereby improving the condition of the glass fragments of the volcanic process, achieving the cooling effect of the glass and solving the problems of easy glass breakage, cracking and the like existing in the existing preparation method.

Description

Preparation method and device of 3D glass crater structure, 3D glass and preparation method

Technical Field

The invention relates to the technical field of 3D glass cover plates, in particular to a preparation method and device of a 3D glass crater structure, 3D glass and a preparation method.

Background

The curved glass is formed by heating, bending and softening high-quality glass, and then annealing, so that the curved glass is attractive in appearance and smooth in line, breaks through the singleness of the plate glass, and is more flexible and diversified in use. With the progress of industrial level and the increasing of the living standard of people, the use of the hot-bent glass in the building and civil occasions is increasing. The civil hot-bending glass is mainly used for mobile phones, vehicle-mounted glass cover plates, glass furniture, glass aquariums, glass hand basins, glass counters, glass decorations and the like.

At present, in the technology for manufacturing the volcanic vent products in the market, adverse phenomena such as glass breakage, explosion and the like are easy to cause, and the yield of hot-bending products is reduced. In addition, the 3D glass crater cannot be molded in place in the traditional process, and the problems of edge collapse, non-molding and the like are easily caused.

Disclosure of Invention

The invention aims to solve the technical problems that: the existing preparation method of the hot-bent glass has the problems of easy glass breakage, cracking and the like.

In order to solve the technical problems, the embodiment of the invention provides a preparation method and device of a 3D glass crater structure, 3D glass and a preparation method. The specific contents are as follows:

in a first aspect, an embodiment of the present invention provides a method for manufacturing a 3D glass crater structure, the method including:

heating a mold containing a glass plate to a softening point temperature of the glass plate;

pressing the die at a constant speed under the condition of heat preservation;

adopting a combined cooling mode of short temperature annealing and step annealing to cool; wherein, the reduction temperature annealing means: annealing at 100 ℃ within 20-60 s.

In some embodiments, the cooling by using a combination cooling mode of the short temperature annealing and the step annealing includes:

firstly, annealing at the shortening temperature twice, and preserving heat for 20-40 s after each time;

and then cooling to 150 ℃ at a speed of 30-50 s, preserving heat for 10-20 s, and repeating the operation until the temperature is completely reduced.

In some embodiments, the uniform speed lamination refers to: the uniform-speed pressing is carried out based on the self weight of the upper die of the die and the servo high-pressure control; wherein the pressing amount of the uniform-speed pressing is 0.01-0.05 mm/s.

In some embodiments, the heating of the mold containing the glass sheet to a softening point temperature of the glass sheet comprises:

heating the outer surface of the mold;

and heating the glass plate to the softening point temperature based on the heat conductivity of the mold, and preserving heat for 20-30 s.

In some embodiments, the heating of the outer surface of the mold comprises: and heating the die in a stepped heating mode.

In some embodiments, the step heating means is: heating at a heating rate of 10-20 s to 150 ℃, and preserving heat for 10-15 s when each temperature node is reached.

In a second aspect, an embodiment of the present invention provides a device for manufacturing a 3D glass crater structure. The preparation method according to the first aspect is carried out in the preparation apparatus.

In some embodiments, the preparation device comprises: a control center and a transport assembly;

the control center is used for setting and controlling time and temperature required by each process node in the preparation method;

the conveying assembly is used for conveying the mold with the glass plate into each process stage.

In a third aspect, embodiments of the present invention provide a method for manufacturing 3D glass. The preparation method comprises the preparation method of the first aspect.

In a fourth aspect, embodiments of the present invention provide a 3D glass. The 3D glass is produced by the production method described in the third aspect.

The invention provides a preparation method and device of a 3D glass crater structure, 3D glass and a preparation method. The preparation method of the 3D glass crater structure comprises the following steps: heating a mold containing a glass plate to a softening point temperature of the glass plate; pressing the die at a constant speed under the condition of heat preservation; adopting a combined cooling mode of short temperature annealing and step annealing to cool; wherein, the reduction temperature annealing means: annealing at 100 ℃ within 20-60 s. The method adopts a combined cooling mode of the short temperature annealing and the step annealing to cool down, well releases the surface stress of the glass, thereby improving the glass fragmentation condition of the volcanic process, achieving the glass cooling effect and solving the problems of easy glass fragmentation, explosion and the like existing in the prior preparation method.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 shows a flow chart of a method for fabricating a 3D glass crater structure in accordance with an embodiment of the present invention;

FIG. 2 shows a schematic view of the structural positions of a mold and a glass sheet in an embodiment of the invention.

Reference numerals illustrate:

1. an upper die; 2. glass before hot bending; 3. glass after hot bending; 4. and (5) lower die.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, which may be embodied in many different forms and not limited to the specific embodiments disclosed herein, but rather to include all technical solutions falling within the scope of the claims.

These embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It should be noted that: the relative arrangement of parts and steps, the composition of materials, numerical expressions and numerical values set forth in these embodiments should be construed as exemplary only and not limiting unless otherwise specifically stated.

In the description of the present invention, unless otherwise indicated, the meaning of "plurality of" means greater than or equal to two; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present invention and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention. When the absolute position of the object to be described is changed, the relative positional relationship may be changed accordingly.

Furthermore, the use of the terms first, second, and the like in the present application are not used for any order, quantity, or importance, but rather are used for distinguishing between different parts. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error. The word "comprising" or "comprises" and the like means that elements preceding the word encompass the elements recited after the word, and not exclude the possibility of also encompassing other elements.

It should also be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art. When a particular device is described as being located between a first device and a second device, there may or may not be an intervening device between the particular device and either the first device or the second device.

All terms used herein have the same meaning as understood by one of ordinary skill in the art to which the present invention pertains, unless specifically defined otherwise. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.

FIG. 1 shows a flow chart of a method for fabricating a 3D glass crater structure in accordance with an embodiment of the present invention; FIG. 2 shows a schematic view of the structural positions of a mold and a glass sheet in an embodiment of the invention. The system provided by the present invention is described in detail below with reference to fig. 1 and 2.

In a first aspect, an embodiment of the present invention provides a method for preparing a 3D glass crater structure, as shown in fig. 1, where the method includes:

heating a mold containing a glass plate to a softening point temperature of the glass plate;

pressing the die at a constant speed under the condition of heat preservation;

adopting a combined cooling mode of short temperature annealing and step annealing to cool; wherein, the reduction temperature annealing means: annealing at 100 ℃ within 20-60 s.

According to the method provided by the embodiment, the combined cooling mode of the short temperature annealing and the step annealing is adopted for cooling, and the surface stress of the glass can be well released by controlling the annealing speed, so that the condition of broken glass of a volcanic process is improved, the cooling effect of the glass is achieved, and the problems that glass is broken, burst and the like are easy to cause in the existing preparation method are solved.

In some embodiments, the cooling is performed by adopting a combined cooling mode of the short temperature annealing and the step annealing, and the method comprises the following steps:

firstly, annealing at the shortening temperature twice, and preserving heat for 20-40 s after each time;

and then cooling to 150 ℃ at a speed of 30-50 s, preserving heat for 10-20 s, and repeating the operation until the temperature is completely reduced.

In this embodiment, after the 3D volcanic structure is formed by hot bending and high-temperature press molding, 100 ℃ (i.e. from 800 ℃ to 700 ℃) is reduced within 20-60 s, and the annealing is performed by heat preservation for 20-40 s, and the process is repeated twice. In the annealing process, the main effect is to shape the crater structure well, and the annealing temperature is reduced by 100 ℃ for two times, so as to achieve the effect of slow constant-temperature annealing and prevent the conditions of cracking and crushing of products, unstable external dimension and the like caused by too fast cooling.

Then, after the shaping of the volcanic vent is finished, the glass enters the next station to carry out step-type slow annealing at 150 ℃ to release the surface stress of the glass, improve the condition of broken glass of the volcanic vent process and achieve the cooling effect of the glass. After the temperature is reduced by 150 ℃ each time, the heat is preserved for 10-20 seconds, so that bubbles at the bending position of the product can be effectively solved, and deformation quantity is guaranteed.

In some embodiments, uniform speed lamination refers to: the uniform-speed pressing is carried out based on the self weight of the upper die of the die and the servo high-pressure control; wherein the pressing amount of uniform-speed pressing is 0.01-0.05 mm/s.

In this embodiment, through the high temperature preheating mould surface, after the mould surface high temperature toasts, go up mould self weight and can slowly push down, match servo high pressure control simultaneously, can control the volume of pushing down effectively, realize pushing down at the uniform velocity, avoided pushing down fast and cause the phenomenon emergence of piece, kept good plasticity effect.

In some embodiments, heating a mold containing a glass sheet to a softening point temperature of the glass sheet comprises:

heating the outer surface of the mold;

and heating the glass plate to the softening point temperature based on the heat conductivity of the mold, and preserving heat for 20-30 s.

In this embodiment, as shown in fig. 2, the mold is composed of an upper mold 1 and a lower mold 4, and a glass plate is placed between the upper mold 1 and the lower mold 4. Thus, the outer surface of the mold is heated during heating, and the heating of the glass sheet is indirectly achieved by the thermal conductivity of the mold itself. The heating mode can realize uniform heating of the glass plate, so that the glass plate is heated uniformly, and can be deformed slowly under the action of gravity of the upper die after reaching the softening point temperature, thereby obtaining good plastic effect.

In some embodiments, heating the outer surface of the mold comprises: and heating the die in a stepped heating mode.

In the embodiment, the mould is heated in a step heating mode, so that the mould can conduct heat to the glass plate better, and the heating uniformity of the glass plate is improved.

In some embodiments, the step heating is: heating at a heating rate of 10-20 s to 150 ℃, and preserving heat for 10-15 s when each temperature node is reached.

The preparation method of the 3D glass crater structure provided by the embodiment of the invention has the advantages of high lamination forming rate, capability of changing the cavity along with the shape in the mold closing process, capability of reducing the manufacturing cost in the crater effect field and the like. Meanwhile, the method can improve the adverse phenomena of product breakage, no forming at the crater and the like, improve the yield and reduce the rejection rate and the manufacturing cost after improving the hot bending scheme.

In a second aspect, an embodiment of the present invention provides a device for manufacturing a 3D glass crater structure. The preparation method according to the first aspect is carried out in the preparation apparatus.

In some embodiments, the preparation device comprises: a control center and a transport assembly;

the control center is used for setting and controlling time and temperature required by each process node in the preparation method;

the conveying assembly is used for conveying the mold with the glass plate into each process stage.

In a third aspect, embodiments of the present invention provide a method for manufacturing 3D glass. The preparation method comprises the preparation method of the first aspect.

In a fourth aspect, embodiments of the present invention provide a 3D glass. The 3D glass is produced by the production method described in the third aspect.

For example, a person skilled in the art may better understand the preparation method of the 3D glass crater structure provided by the embodiments of the present invention, and the following details are described in connection with specific embodiments, where:

example 1

Firstly, placing the glass 2 before hot bending between an upper die 1 and a lower die 4, then carrying out step heating on the outer surface of the die, and heating the outer surface of the die to 800 ℃ and then preserving heat for 20s so as to enable the glass 2 before hot bending to reach a softening point;

then, the upper die 1 is slowly pressed and heated at a constant speed under the servo high pressure to bend the front glass 2;

then, the hot-bent glass is annealed at a speed of 100 ℃ in 20s for a short period of time, the temperature is kept for 20s after each time, the temperature is reduced stepwise at a speed of 150 ℃ in 30s, the temperature is kept for 10s after each time of one stage of reduction, and the operation is repeated until the temperature is reduced completely, so that the glass 3 after the press-bending is obtained.

Examples 2 to 6

The procedure of examples 2-6 is similar to that of example 1, except that: the two reduced temperature anneals were performed at a rate of 30s at 100 ℃, 40s at 100 ℃, 50s at 100 ℃, 60s at 100 ℃ and 10s at 100 ℃.

Experimental results: the glass 3 after press bending prepared by the preparation method of examples 1-5 has a crater structure with better plastic effect, and the phenomenon of glass breakage or explosion does not occur. Whereas example 6 annealed in a relatively rapid manner, the resultant glass 3 had cracks in the crater structure after press bending. It is found that the annealing speed of the short temperature annealing has a large influence on the crater structure.

Examples 7 to 9

The procedure of examples 7-9 is similar to that of example 1, except that: in example 7, no incubation was performed between the two reduced temperature annealing stages; in example 8, the incubation was only 10s between two short temperature annealing stages; in example 9, the incubation was performed for 40s between two short temperature annealing stages.

Experimental results: cracks appear in the crater structure of the glass 3 after the press bending prepared in the examples 7 and 8; no cracks were formed in the crater structure of the glass 3 after the press bending prepared in example 9. It can be seen from this that the final plastic effect of the crater structure is affected by whether or not the heat is preserved and the length of the heat preservation time between the two temperature annealing stages is reduced.

Examples 10 to 12

The procedure of examples 10-12 is similar to that of example 1, except that: when the stepped cooling is carried out, the temperature of the examples 10-12 is reduced at the speed of reducing the temperature by 150 ℃ in 40s, 50s and 20s in sequence, and other conditions are kept unchanged; the incubation times for examples 13-15 were 15s, 20s, 5s in order, with the other conditions remaining unchanged.

The experimental results are: the glass 3 after the press bending prepared in examples 10, 11, 13 and 14 has no cracks, no bubbles and excellent plasticity effect at the crater structure. Whereas the crater structure of example 12 exhibited variations and a small number of bubbles, the crater structure of example 15 exhibited more bubbles and variations. Therefore, the bubble phenomenon at the crater structure can be effectively solved and the deformation quantity can be ensured by adopting the stepped cooling and controlling the stepped cooling speed and the heat preservation time.

Thus, various embodiments of the present invention have been described in detail. In order to avoid obscuring the concepts of the invention, some details known in the art have not been described. How to implement the solutions disclosed herein will be fully apparent to those skilled in the art from the above description.

While certain specific embodiments of the invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the invention. It will be understood by those skilled in the art that the foregoing embodiments may be modified and equivalents substituted for elements thereof without departing from the scope and spirit of the invention. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.

Claims (10)

1. The preparation method of the 3D glass crater structure is characterized by comprising the following steps:

heating a mold containing a glass plate to a softening point temperature of the glass plate;

pressing the die at a constant speed under the condition of heat preservation;

adopting a combined cooling mode of short temperature annealing and step annealing to cool; wherein, the reduction temperature annealing means: annealing at 100 ℃ within 20-60 s.

2. The method according to claim 1, wherein the cooling by a combination of the reduced temperature annealing and the step annealing comprises:

firstly, annealing at the shortening temperature twice, and preserving heat for 20-40 s after each time;

and then cooling to 150 ℃ at a speed of 30-50 s, preserving heat for 10-20 s, and repeating the operation until the temperature is completely reduced.

3. The method according to claim 1, wherein the uniform-speed pressing means: the uniform-speed pressing is carried out based on the self weight of the upper die of the die and the servo high-pressure control; wherein the pressing amount of the uniform-speed pressing is 0.01-0.05 mm/s.

4. The method of manufacturing according to claim 1, wherein the heating of the mold containing the glass sheet to a softening point temperature of the glass sheet comprises:

heating the outer surface of the mold;

and heating the glass plate to the softening point temperature based on the heat conductivity of the mold, and preserving heat for 20-30 s.

5. The method of manufacturing according to claim 4, wherein the heating of the outer surface of the mold comprises: and heating the die in a stepped heating mode.

6. The method according to claim 5, wherein the step heating mode is: heating at a heating rate of 10-20 s to 150 ℃, and preserving heat for 10-15 s when each temperature node is reached.

7. A device for manufacturing a 3D glass crater structure, characterized in that the manufacturing method according to any one of claims 1 to 6 is performed in the manufacturing device.

8. The manufacturing apparatus according to claim 7, characterized in that the manufacturing apparatus comprises: a control center and a transport assembly;

the control center is used for setting and controlling time and temperature required by each process node in the preparation method;

the conveying assembly is used for conveying the mold with the glass plate into each process stage.

9. A method for preparing 3D glass, comprising the method according to any one of claims 1 to 6.

10. A 3D glass, characterized in that the 3D glass is produced by the production method according to claim 9.

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