3D curved surface glass ceramic hot bending die
By designing a 3D curved microcrystalline glass hot bending mold, the structural design of the upper and lower molds is used to ensure uniform stress during hot bending, which solves the problems of uneven pressure, crushing and mold damage during hot bending of microcrystalline glass, and improves product yield and mold service life.
Patent Information
- Application Number
- CN202420678487.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-03
AI Technical Summary
During the hot bending process, microcrystalline glass is prone to problems such as uneven pressure, blueness and fog, and the crystallinity becomes larger and hardened, resulting in breakage and mold damage.
A 3D curved microcrystalline glass hot bending mold is designed, including an upper mold and a lower mold. By setting a pressing block on the top of the upper mold and a hot bending groove on the top of the lower mold, a hot bending cavity and a pressure relief cavity are formed to ensure uniform stress during hot bending.
The surface of the microcrystalline glass is flat during the hot bending process, avoiding the problems of product failure, crushing and mold damage, and improving the service life of the mold and product yield.
Smart Images
Figure CN222613179U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of microcrystalline glass processing, and in particular to a 3D curved microcrystalline glass hot bending mold. Background Art
[0002] Glass-ceramics will crystallize, harden and turn blue at temperatures over 800 degrees. Due to the special nature of the glass-ceramics material, the product will not be flattened during the hot bending process and the glass will turn blue and foggy, causing defects. At the same time, as the crystallinity of the glass-ceramics increases and the glass-ceramics hardens, it is easy to cause the glass-ceramics to break and the mold to be damaged. Utility Model Content
[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a 3D curved glass-ceramic hot bending mold.
[0004] The purpose of the utility model is achieved through the following technical scheme: a 3D curved microcrystalline glass hot bending mold, comprising an upper mold and a lower mold, a hot bending groove is provided in the middle of the top of the lower mold, a hot bending block is protruding downward from the middle of the bottom of the upper mold, the hot bending block is located in the hot bending groove, and there is a gap between the inner surface of the hot bending groove and the outer surface of the hot bending block to form a hot bending cavity for hot bending microcrystalline curved glass, an annular edge groove is provided on the top of the hot bending groove, a pressure relief cavity is formed between the side wall of the annular edge groove and the outer surface of the hot bending block, first pressing blocks are protruding upward on both sides of the top of the upper mold, and at least two second pressing blocks arranged laterally are protruding upward from the middle of the top of the upper mold, and the height of the first pressing block is equal to that of the second pressing block.
[0005] Furthermore, the four bottom corners of the upper mold are respectively provided with positioning blocks protruding downwards, and the four top corners of the lower mold are provided with positioning grooves corresponding to the positions of each positioning block, and each positioning block is embedded in the corresponding positioning groove.
[0006] Furthermore, a vacuum adsorption groove is provided at the bottom of the lower mold.
[0007] Furthermore, the heat bending groove, the annular edge groove and the heat bending block are all in the shape of rounded rectangles.
[0008] Furthermore, the bottom surface of the annular edge groove gradually slopes downward from the outside to the inside.
[0009] Furthermore, the bottom surface of the annular edge groove is inclined downward at an angle of 15-25°.
[0010] Furthermore, the middle and lower parts of the hot bending block are gradually inclined inward from top to bottom.
[0011] Furthermore, the lower middle portion of the hot bending block is inclined inwardly at an angle of 3-7°.
[0012] Furthermore, the bottom edge of the heat bending groove is provided with a first rounded corner, and the bottom edge of the heat bending block is provided with a second rounded corner.
[0013] Furthermore, the top edge of the annular side groove is provided with a chamfer.
[0014] The beneficial effects of the utility model are as follows: the 3D curved microcrystalline glass hot bending mold of the utility model arranges first pressing blocks on both sides of the top of the upper mold, and arranges at least two transversely arranged second pressing blocks in the middle of the top of the upper mold. The heights of the first pressing blocks and the second pressing blocks are equal, and the force is evenly applied during hot bending, so that the surface of the microcrystalline glass is flat during the hot bending process, which improves the problem that the product cannot be flattened during the hot bending process of the microcrystalline glass, improves the problems of microcrystalline glass breakage and mold damage, increases the service life of the mold, and improves the product yield. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a stereogram of the utility model.
[0016] Figure 2 It is a three-dimensional exploded view of the utility model.
[0017] Figure 3 It is a three-dimensional exploded view of the utility model from another viewing angle.
[0018] Figure 4 It is a transverse sectional view of the utility model.
[0019] Figure 5 It is a longitudinal sectional view of the utility model.
[0020] The accompanying drawings are marked as: upper mold 1, hot bending block 11, second fillet 111, hot bending cavity 12, first pressing block 13, second pressing block 14, pressure relief cavity 15, positioning block 16, lower mold 2, hot bending groove 21, first fillet 211, annular edge groove 22, chamfer 221, positioning groove 23, vacuum adsorption groove 24. DETAILED DESCRIPTION
[0021] In order to facilitate the understanding of those skilled in the art, the following embodiments and attached Figure 1-5 To further illustrate the present invention, the contents mentioned in the implementation modes are not intended to limit the present invention.
[0022] See Figure 1-5A 3D curved microcrystalline glass hot bending mold comprises an upper mold 1 and a lower mold 2, a hot bending groove 21 is provided in the middle of the top of the lower mold 2, a hot bending block 11 is protruded downward in the middle of the bottom of the upper mold 1, the hot bending block 11 is located in the hot bending groove 21, and there is a gap between the inner surface of the hot bending groove 21 and the outer surface of the hot bending block 11 to form a hot bending cavity 12 for hot bending microcrystalline curved glass, an annular edge groove 22 is provided on the top of the hot bending groove 21, a pressure relief cavity 15 is formed between the side wall of the annular edge groove 22 and the outer surface of the hot bending block 11, first pressing blocks 13 are protruded upward on both sides of the top of the upper mold 1, at least two second pressing blocks 14 arranged laterally are protruded upward in the middle of the top of the upper mold 1, and the height of the first pressing block 13 is equal to that of the second pressing block 14.
[0023] The 3D curved microcrystalline glass hot bending mold of the utility model is provided with first pressing blocks 13 on both sides of the top of the upper mold 1, and at least two transversely arranged second pressing blocks 14 are provided in the middle of the top of the upper mold 1. The heights of the first pressing blocks 13 and the second pressing blocks 14 are equal, and the force is evenly applied during hot bending, so that the surface of the microcrystalline glass is flat during the hot bending process, which improves the problem that the product cannot be flattened during the hot bending process of the microcrystalline glass, improves the problems of microcrystalline glass breakage and mold damage, increases the service life of the mold, and improves the product yield.
[0024] In this embodiment, the four bottom corners of the upper mold 1 are respectively provided with positioning blocks 16 protruding downward, and the four top corners of the lower mold 2 are provided with positioning grooves 23 corresponding to the positions of each positioning block 16, and each positioning block 16 is embedded in the corresponding positioning groove 23. The above-mentioned structure is arranged to facilitate the alignment of the upper mold 1 and the lower mold 2.
[0025] In this embodiment, a vacuum adsorption groove 24 is provided at the bottom of the lower mold 2. By adding the vacuum adsorption groove 24, the convex surface of the product is closely attached to the lower mold 2.
[0026] In this embodiment, the heat bending groove 21, the annular edge groove 22 and the heat bending block 11 are all in the shape of a rounded rectangle. The above-mentioned mechanism can be arranged to heat bend the glass cover of a mobile phone.
[0027] In this embodiment, the bottom surface of the annular edge groove 22 gradually tilts downward from the outside to the inside. Specifically, the bottom surface of the annular edge groove 22 tilts downward at an angle of 15-25°. In order to achieve the best use effect of the utility model: the bottom surface of the annular edge groove 22 tilts downward at an angle of 20°. The above-mentioned structure is arranged to facilitate pressure relief during hot bending of the microcrystalline glass and prevent the microcrystalline glass from breaking.
[0028] In this embodiment, the middle and lower parts of the heat bending block 11 gradually tilt inward from top to bottom. Specifically, the inward tilt angle of the middle and lower parts of the heat bending block 11 is 3-7°. In order to achieve the best use effect of the utility model: the inward tilt angle of the middle and lower parts of the heat bending block 11 is 5°. The above-mentioned structure is arranged to facilitate the heat bending of the microcrystalline glass curved surface.
[0029] In this embodiment, the bottom edge of the heat bending groove 21 is provided with a first rounded corner 211, and the bottom edge of the heat bending block 11 is provided with a second rounded corner 111. The above-mentioned structure is convenient for heat bending of the microcrystalline glass curved surface.
[0030] In this embodiment, the top edge of the annular edge groove 22 is provided with a chamfer 221. The above structure is arranged to facilitate pressure relief during hot bending of the micro-ceramic glass and prevent the micro-ceramic glass from breaking.
[0031] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present invention is within the protection scope of the present invention.
Claims
1. A 3D curved glass-ceramic hot bending mold, comprising an upper mold and a lower mold, characterized in that: A heat bending groove is provided in the middle of the top of the lower mold, and a heat bending block is protruding downward from the middle of the bottom of the upper mold. The heat bending block is located in the heat bending groove, and there is a gap between the inner surface of the heat bending groove and the outer surface of the heat bending block to form a heat bending cavity for heat bending microcrystalline curved glass. An annular edge groove is provided on the top of the heat bending groove, and a pressure relief cavity is formed between the side wall of the annular edge groove and the outer surface of the heat bending block. First pressing blocks are protruding upward on both sides of the top of the upper mold, and at least two second pressing blocks arranged laterally are protruding upward in the middle of the top of the upper mold, and the height of the first pressing block is equal to that of the second pressing block.
2. A 3D curved glass-ceramic hot bending mold according to claim 1, characterized in that: The four bottom corners of the upper mold are respectively provided with positioning blocks protruding downwards, and the four top corners of the lower mold are provided with positioning grooves corresponding to the positions of each positioning block, and each positioning block is embedded in the corresponding positioning groove.
3. A 3D curved glass-ceramic hot bending mold according to claim 1, characterized in that: A vacuum adsorption groove is provided at the bottom of the lower mold.
4. The 3D curved glass-ceramic hot bending mold according to claim 1, characterized in that: The heat bending groove, the annular edge groove and the heat bending block are all in the shape of rounded rectangles.
5. The 3D curved glass-ceramic hot bending mold according to claim 1, characterized in that: The bottom surface of the annular edge groove gradually slopes downward from the outside to the inside.
6. The 3D curved glass-ceramic hot bending mold according to claim 5, characterized in that: The bottom surface of the annular edge groove is inclined downward at an angle of 15-25°.
7. The 3D curved glass-ceramic hot bending mold according to claim 1, characterized in that: The middle and lower parts of the hot bending block are gradually inclined inwards from top to bottom.
8. The 3D curved glass-ceramic hot bending mold according to claim 7, characterized in that: The lower and middle parts of the hot bending block are inclined inwardly at an angle of 3-7°.
9. The 3D curved glass-ceramic hot bending mold according to claim 1, characterized in that: The bottom edge of the heat bending groove is provided with a first rounded corner, and the bottom edge of the heat bending block is provided with a second rounded corner.
10. The 3D curved glass-ceramic hot bending mold according to claim 1, characterized in that: The top edge of the annular side groove is provided with a chamfer.