Heating induction device for hot bending forming of glass
By providing heating components and sensors inside the first mold of the glass thermal bending forming device, rapid and uniform heating and pressing of the glass are achieved, solving the problems of slow forming speed and polishing processing, and improving molding efficiency and product quality.
Patent Information
- Application Number
- CN202323635350.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2033-12-29
AI Technical Summary
The existing glass thermal bending forming devices have problems such as slow forming speed and difficulty in temperature regulation during the 3D glass forming process, and polishing is required to remove mold marks after forming.
A heating induction device including a first mold, a heating assembly and a second mold is designed. By providing a plurality of heating pipes and temperature/pressure sensors inside the first mold, uniform heating and pressing of the glass is achieved to ensure rapid softening of the glass. and molding, and no polishing treatment is required after molding.
The rapid temperature increase and controllable temperature of the glass are achieved, which shortens the forming time, avoids the polishing step after forming, and improves the forming efficiency and product quality.
Smart Images
Figure CN222293902U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of glass forming, in particular to a heating induction device used for glass hot bending forming. Background Art
[0002] With the development trend of large-screen and multi-screen applications, glass cover with good touch and excellent optical performance has become one of the main choices for vehicle display cover materials. Of course, 2D glass is currently the mainstream, but as consumers' demand for quality and design increases, 3D glass will definitely be the final trend.
[0003] Due to the large size and complex shape of the 3D curved automotive glass, the technology generally adopts the hot bending method. Specifically, a high-temperature graphite mold is used as a carrier and heated to 600-700°C in the cavity to soften the glass and fit it to the mold of a specific shape to replicate the required 3D glass shape, and then cool it to form a complete finished glass. The hot bending process is one of the most core processes in the 3D glass manufacturing process, and it is also one of the difficulties.
[0004] There are currently two mainstream hot bending methods. The first is the traditional hot bending process, which uses gravity to make the glass fit the mold. The disadvantage is that the molding is slow. The second is hot pressing molding, which injects molten glass into the mold and then heats and pressurizes it to form the desired shape. The advantage of this method is fast molding, but the disadvantage is that it will leave a mark of the mold on the glass surface, which requires subsequent polishing.
[0005] In the invention patent application with application publication number CN108545916A, a glass plate hot bending forming machine is proposed. The glass plate hot bending forming machine is used to hot bend a flat glass plate therein to form a curved glass plate product. The glass plate hot bending forming machine includes a hot bending forming device, which includes a graphite mold for hot bending the glass plate therein, a mold pressing mechanism provided on a frame for applying pressure to the graphite mold during forming, and a mold heating mechanism for heating the graphite mold. The mold heating mechanism includes an induction heating body for heating the graphite mold by induction heating. The induction heating body has a heating cavity that is adapted to the shape and size of the mold and is proportionally scaled and can be sleeved on the outside of the mold. The induction heating body includes a heating part, which is a ring-shaped heating ring that is proportionally enlarged by the shape and size of the graphite mold. Since the induction heating body is sleeved on the mold shell, it needs to use the graphite mold as a carrier to heat the glass product inside the graphite mold during heating, which will generate a large amount of heat loss, and it is difficult to quickly control the temperature change, so that the glass is formed slowly.
[0006] Based on this, the existing technology still needs to be improved. Utility Model Content
[0007] In view of the deficiencies of the prior art, the utility model proposes a heating induction device for glass hot bending molding, which can at least solve the problem that the existing glass hot bending molding device has slow molding when making 3D glass.
[0008] A heating induction device for hot bending of glass in this embodiment includes: a first mold, a heating assembly, and a second mold. The upper surface of the first mold is in a 3D curved shape; the heating assembly is arranged inside the first mold to heat the glass on the upper surface of the first mold to soften the glass; the second mold is used to cooperate with the first mold to press the glass after the glass is softened to form a 3D curved shape.
[0009] In some embodiments, the heating assembly includes a plurality of heating tubes, which are laid inside the first mold and are evenly distributed so that the glass can be heated evenly. The upper portion of the heating tube does not exceed the upper surface of the first mold to avoid indentations on the glass that affect the shape of the glass.
[0010] In some embodiments, the first mold is also provided with a temperature sensor for sensing the temperature of the surface of the first mold and the glass thereon. When the heating tube starts to heat, the temperature is transmitted to the sensor on the mold, and the temperature sensor monitors whether the temperature reaches the set value. If it reaches, the heating tube is controlled to keep warm. If it does not reach, the heating tube continues to heat up. After the temperature reaches the set value, the second mold is started and pressed against the glass, so that the texture of the glass is evenly distributed and the shape meets the standard.
[0011] In some embodiments, there are multiple temperature sensors, which are distributed along the upper surface of the first mold, so as to facilitate multi-directional detection of the glass and improve the accuracy of detection. When the temperature detected by all the temperature sensors reaches the preset value, the second mold is activated and pressed against the glass.
[0012] In some embodiments, a plurality of temperature sensors are seamlessly embedded in the first mold, and the upper portion of the temperature sensors is flush with the upper surface of the first mold, thereby avoiding indentations on the glass during glass molding and avoiding subsequent polishing steps.
[0013] In some embodiments, a pressure sensor is also provided on the first mold to detect whether the glass is in contact with the first mold. The pressure sensor determines whether the glass is in contact with the upper surface of the first mold by detecting the pressure value of the glass. If the glass is not in contact with the first mold, the height and angle of the second mold are adjusted to meet the set pressure requirements.
[0014] In some embodiments, there are multiple pressure sensors, and the multiple pressure sensors are distributed along the upper surface of the first mold, so as to facilitate detection of various positions of the glass, improve the accuracy of detection, and determine whether the glass is completely fitted.
[0015] In some embodiments, a plurality of pressure sensors are seamlessly embedded in the first mold, and the upper portion of the pressure sensors is flush with the upper surface of the first mold, thereby avoiding indentations on the glass during glass molding and avoiding subsequent polishing steps.
[0016] In some embodiments, the upper surface of the first mold is further provided with a plurality of positioning points for defining the position of the glass, so as to define the placement position of the glass.
[0017] In some embodiments, the heating tube is a copper heating tube.
[0018] The beneficial effects of the utility model are as follows: the utility model can heat the glass directly by arranging a heating component inside the first mold, so that the glass can be heated quickly, and the raised temperature is controllable and adjustable, and the glass softening time is short and the speed is fast. After the glass is formed, the heating component is no longer heated, so that the glass is cooled quickly, and since the single piece of glass is pressed, the glass does not need to be polished after being formed. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 A schematic structural diagram of a first mold of a heating induction device for hot bending of glass provided in an embodiment of the utility model is shown;
[0020] Figure 2 A partial cross-sectional view of a first mold of a heating induction device for glass hot bending molding provided by an embodiment of the utility model is shown;
[0021] Figure 3 A schematic diagram showing the internal structure of a first mold of a heating induction device for hot bending of glass provided in an embodiment of the utility model is shown;
[0022] Figure 4 The temperature sensor distribution diagram on the first mold of a heating induction device for glass hot bending molding provided by an embodiment of the utility model is shown;
[0023] Figure 5 The diagram shows the distribution of pressure sensors on the first mold of a heating induction device for glass hot bending molding provided by an embodiment of the utility model.
[0024] 1. First mold; 2. Heating tube; 3. Positioning point; 4. Temperature sensor; 5. Pressure sensor. DETAILED DESCRIPTION
[0025] It should be understood that the embodiments of the present invention shown in the exemplary embodiments are illustrative only. Although only a few embodiments are described in detail in the present invention, it is easy for those skilled in the art to understand that multiple modifications are feasible without actually departing from the teachings of the subject matter of the present invention. Accordingly, all such modifications should be included within the scope of the present invention. Without departing from the gist of the present invention, other replacements, modifications, changes and deletions may be made to the design, operating conditions and parameters of the following exemplary embodiments.
[0026] The utility model provides a heating induction device for hot bending of glass, comprising: a first mold 1, a heating assembly, and a second mold. The upper surface of the first mold 1 is in the shape of a 3D curved surface; the heating assembly is arranged inside the first mold 1 to heat the glass on the upper surface of the first mold 1 to soften the glass. The second mold is used to cooperate with the first mold 1 to press the glass after the glass is softened to form a 3D curved surface (the second mold is not shown in the figure). Specifically, Figure 1 and Figure 2 As shown, the upper surface of the first mold 1 has a concave mold for forming the glass, and the bottom wall of the groove includes two planes and a curved surface connecting the two planes. The lower surface of the second mold is provided with a convex film matching the concave film on the first mold 1. When pressing the glass, the concave mold and the convex mold are combined to form a closed space around the circle, and the convex mold is pressed into the glass in the concave mold to form a 3D curved surface shape of the glass. Both the first mold 1 and the second mold are made of graphite. The heating component is arranged inside the first mold 1 to heat the glass.
[0027] Compared with the prior art, the utility model directly heats the glass by arranging a heating component inside the first mold 1, so that the glass can be heated quickly, and the raised temperature is controllable and adjustable, and the glass softening time is short and the speed is fast. After the glass is formed, the heating component is no longer heated, so that the glass is cooled quickly. Since the embodiment presses a single piece of glass, the glass does not need to be polished after it is formed.
[0028] In some embodiments, Figure 3 As shown, the heating assembly includes a plurality of heating tubes 2, which are laid inside the first mold 1 and are evenly distributed so that the glass can be heated evenly. The upper portion of the heating tubes 2 does not exceed the upper surface of the first mold 1 to avoid indentations on the glass that affect the shape of the glass.
[0029] In some embodiments, Figure 4As shown, the first mold 1 is also provided with a temperature sensor 4 for sensing the temperature of the surface of the first mold 1 and the glass thereon. When the heating tube 2 starts to heat, the temperature is transmitted to the sensor on the mold, and the temperature sensor 4 monitors whether the temperature reaches the set value. If it reaches, the heating tube 2 is controlled to keep warm. If it does not reach, the heating tube 2 continues to heat up. After the temperature reaches the set value, the second mold is started and pressed against the glass, so that the texture of the glass is evenly distributed and the shape meets the standard.
[0030] In some embodiments, there are multiple temperature sensors 4, and the multiple temperature sensors 4 are distributed along the surface of the first mold 1, which is convenient for multi-directional detection of the glass and improves the accuracy of the detection. When the temperature detected by all the temperature sensors 4 reaches the preset value, the second mold is started and pressed against the glass. Specifically, it also includes a control system, which is used to receive the temperature signal transmitted by the temperature sensor 4, and control the heating of the heating tube 2 and the opening and closing of the second mold according to the temperature signal.
[0031] In some embodiments, a plurality of temperature sensors 4 are seamlessly embedded in the first mold 1, and the upper portion of the temperature sensors 4 is flush with the upper surface of the first mold 1. This avoids indentation of the glass during glass molding and avoids subsequent polishing steps.
[0032] In some embodiments, Figure 5 As shown, the first mold 1 is also provided with a pressure sensor 5 for detecting whether the glass is completely attached to the first mold 1. The pressure sensor 5 determines whether the glass is attached to the upper surface of the first mold 1 by detecting the pressure value of the glass. If the glass is not attached, the height and angle of the second mold are adjusted to meet the set pressure requirements.
[0033] In some embodiments, there are multiple pressure sensors 5, and the multiple pressure sensors 5 are distributed along the surface of the first mold 1. It is convenient to detect all directions of the glass, improve the accuracy of the detection, and judge whether the glass is completely fitted. The control system can also receive the pressure value signal transmitted by the pressure sensor 5, and control the height and angle of the second mold according to the pressure value signal.
[0034] In some embodiments, a plurality of pressure sensors 5 are seamlessly embedded in the first mold 1, and the upper portion of the pressure sensors 5 is flush with the upper surface of the first mold 1. This avoids indentation of the glass during glass molding and avoids subsequent polishing steps.
[0035] In some embodiments, the upper surface of the first mold 1 is further provided with a plurality of positioning points 3 for defining the position of the glass, so as to define the placement position of the glass.
[0036] In some embodiments, the heating tube 2 is a copper heating tube, which has good thermal conductivity and is easy to bend. The curved copper tube in the first mold 1 with a 3D curved surface can heat glasses of different thicknesses at equal distances, greatly improving the accuracy of heating and saving energy.
[0037] The working principle and working process of the utility model are as follows:
[0038] Place a piece of flat glass in the positioning point 3 on the first mold 1, then turn on all the heating tubes 2 to heat the glass thereon. When the temperature detected by all the temperature sensors 4 reaches the preset value, the heating tubes 2 are adjusted to the heat preservation state, and the control system controls the second mold to start and press against the glass. At this time, the glass is in a softened state, and the glass is bonded to the upper surface of the first mold 1 to form a 3D curved state. The pressure sensor 5 determines whether the glass is bonded to the upper surface of the first mold 1 by detecting the pressure value of the glass. Adjust the height and angle of the second mold at the unbonded part to meet the set pressure requirements. When the pressure values detected by all the pressure sensors 5 meet the requirements, turn off the heating tubes 2, and withdraw from the second mold after a certain period of time to allow the glass to cool and set. When the temperature sensor 4 detects that the temperature of the glass has dropped to meet the requirements, take out the glass.
[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. If the present invention is modified or replaced by equivalents without departing from the spirit and scope of the present invention, it should be included in the scope of protection of the claims of the present invention.
Claims
1. A heating induction device for glass hot bending, characterized in that: include: A first mold (1), wherein the upper surface of the first mold (1) is in the shape of a 3D curved surface; A heating component, the heating component is arranged inside the first mold (1) to heat the glass located on the upper surface of the first mold (1) to soften the glass; and The second mold is used to cooperate with the first mold (1) to press the glass after the glass is softened so as to form a 3D curved surface.
2. The heating induction device for glass hot bending molding according to claim 1, characterized in that: The heating assembly comprises a plurality of heating tubes (2), wherein the plurality of heating tubes (2) are laid in the first mould (1), and the upper parts of the heating tubes (2) do not exceed the upper surface of the first mould (1).
3. The heating induction device for glass hot bending molding according to claim 1, characterized in that: The first mold (1) is also provided with a temperature sensor (4) for sensing the temperature of the surface of the first mold (1) and the glass thereon.
4. The heating induction device for glass hot bending molding according to claim 3, characterized in that: There are a plurality of temperature sensors (4), and the plurality of temperature sensors (4) are distributed along the upper surface of the first mold (1).
5. The heating induction device for glass hot bending molding according to claim 4, characterized in that: The plurality of temperature sensors (4) are seamlessly embedded in the interior of the first mould (1), and the upper portion of the temperature sensors (4) is flush with the upper surface of the first mould (1).
6. The heating induction device for glass hot bending molding according to claim 1, characterized in that: The first mold (1) is also provided with a pressure sensor (5) for detecting whether the glass is in contact with the first mold (1).
7. The heating induction device for glass hot bending molding according to claim 6, characterized in that: There are a plurality of pressure sensors (5), and the plurality of pressure sensors (5) are distributed along the upper surface of the first mold (1).
8. The heating induction device for glass hot bending molding according to claim 7, characterized in that: The plurality of pressure sensors (5) are seamlessly embedded in the interior of the first mold (1), and the upper portion of the pressure sensor (5) is flush with the upper surface of the first mold (1).
9. The heating induction device for glass hot bending molding according to claim 1, characterized in that: The upper surface of the first mold (1) is also provided with a plurality of positioning points (3) for defining the position of the glass.
10. The heating induction device for glass hot bending molding according to claim 2, characterized in that: The heating tube (2) is a copper heating tube.