Small-curvature hot bending glass mold

Abstract

The utility model provides a small-curvature hot bending glass mold which comprises a lower mold assembly, the lower mold assembly comprises a forming structure, the forming structure is provided with a first forming face, and the first forming face is a convex face; and the upper die assembly comprises a plurality of upper die structures, the multiple upper die structures jointly form a second forming face, the second forming face is a concave face, and the first forming face and the second forming face are consistent with the outer surface of the glass to be subjected to hot bending in shape. According to the technical scheme, the problem that in the hot bending process of small-curvature glass in the prior art, the glass is prone to fragmentation is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of glass processing, and in particular to a small-curvature hot-bending glass mold. Background Art

[0002] Heat-bent glass is widely used in people's lives, such as car covers, building facilities and electronic equipment, all of which use heat-bent glass.

[0003] In the process of hot bending of glass, the glass is usually placed on a concave mold and a convex mold is placed on the glass to press the glass downward.

[0004] When the glass curvature radius is small, the glass is easily broken due to the large force from the punch, the yield is low, and the broken glass will cause damage to the mold, affecting subsequent glass processing, such as CN219363498U. Utility Model Content

[0005] A technical problem to be solved by the present application is that during the thermal bending process of small-curvature glass, there is a problem that the glass is easily broken.

[0006] In order to solve the above technical problems, the present application provides a small curvature hot-bending glass mold.

[0007] A small-curvature hot-bending glass mold provided according to the present application includes: a lower mold assembly, the lower mold assembly includes a molding structure, the molding structure has a first molding surface, and the first molding surface is a convex surface; an upper mold assembly, the upper mold assembly includes multiple upper mold structures, and the multiple upper mold structures together constitute a second molding surface, and the second molding surface is a concave surface. The first molding surface and the second molding surface are consistent with the outer surface shape of the glass to be hot-bent.

[0008] In some embodiments, the upper mold assembly includes a first upper mold structure and a second upper mold structure, the first upper mold structure has a molding plane, the second upper mold structure has a molding curved surface, and the molding plane and the molding curved surface together constitute a second molding surface.

[0009] In some embodiments, the lower mold assembly also includes a first limiting structure, which is connected to the molding structure. The first upper mold structure has a first positioning portion, which is arranged corresponding to the first limiting structure. The first limiting structure can be movably inserted into the first positioning portion, and the first positioning portion is located on the side of the first upper mold structure away from the second upper mold structure.

[0010] In some embodiments, the first limiting structure includes a first groove, the groove width of the first groove is greater than the thickness of the glass to be heat-bent, and the side edge of the glass to be heat-bent abuts against the bottom of the first groove.

[0011] In some embodiments, a projection width of the first limiting structure in the horizontal direction is greater than a projection width of the glass to be bent in the horizontal direction.

[0012] In some embodiments, the lower mold assembly also includes a second limiting structure, which is connected to the molding structure and arranged on both sides of the first molding surface. The first upper mold structure has a second positioning portion, which is arranged corresponding to the second limiting structure, and the second limiting structure can be movably inserted into the second positioning portion.

[0013] In some embodiments, the second limiting structure includes a second groove, the groove width of the second groove is greater than the thickness of the glass to be hot-bent, and a portion of the glass to be hot-bent is located in the second groove.

[0014] In some embodiments, the molding structure further includes a guiding portion, the second upper mold structure includes a third positioning portion, the third positioning portion is arranged corresponding to the guiding portion, and the guiding portion is movably arranged in the third positioning portion.

[0015] In some embodiments, the molding structure includes a plurality of third grooves, and the plurality of third grooves are respectively arranged corresponding to the plurality of upper mold structures.

[0016] In some embodiments, the lower mold assembly and the upper mold assembly are made of ceramic material.

[0017] Through the above technical solution, the small curvature heat-bending glass mold provided by the present application has a concave upper mold component, which reduces the volume of the upper mold component, thereby reducing the mass of the upper mold component and reducing the pressure on the glass. The upper mold component is divided into multiple upper mold structures, and the multiple upper mold structures perform segmented molding on the heat-bent glass, reducing the pressure on the glass and preventing the glass from breaking. The technical solution of the present application effectively solves the problem of easy shattering of glass during the heat bending process of small curvature glass in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of a small-curvature hot-bending glass mold disclosed in Example 1 of the present application is shown;

[0020] Figure 2 Shows Figure 1 A schematic diagram of the main cross-sectional structure of a small curvature hot-bending glass mold;

[0021] Figure 3 Shows Figure 1Schematic diagram of the left view cross-sectional structure of a small curvature hot-bending glass mold.

[0022] Description of reference numerals:

[0023] 10. Lower mold assembly; 11. Molding structure; 111. Third groove; 12. First limiting structure; 121. First groove; 13. Second limiting structure; 131. Second groove; 14. Guide portion; 20. Upper mold assembly; 21. First upper mold structure; 211. Molding plane; 212. Second positioning portion; 22. Second upper mold structure; 221. Molding curved surface. DETAILED DESCRIPTION

[0024] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions and drawings of the following examples are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments of the present application, but includes all technical solutions that fall within the scope of the claims.

[0025] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0026] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0027] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0028] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0029] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0030] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0031] like Figures 1 to 3 As shown, the small curvature hot-bending glass mold disclosed in the first embodiment of the present application includes: a lower mold assembly 10 and an upper mold assembly 20. The lower mold assembly 10 includes a molding structure 11, and the molding structure 11 has a first molding surface, and the first molding surface is a convex surface. The upper mold assembly 20 includes multiple upper mold structures, and the multiple upper mold structures together constitute a second molding surface, and the second molding surface is a concave surface. The first molding surface and the second molding surface are consistent with the outer surface shape of the glass to be hot bent.

[0032] By applying the technical solution of the first embodiment, the upper mold assembly 20 is a concave surface, which reduces the volume of the upper mold assembly 20, thereby reducing the mass of the upper mold assembly 20 and reducing the pressure on the glass. The upper mold assembly 20 is divided into multiple upper mold structures, and the multiple upper mold structures are segmented to form the glass to be bent, thereby reducing the pressure on the glass and preventing the glass from breaking. The technical solution of the present application effectively solves the problem in the prior art that the glass is easy to break during the hot bending process of small curvature glass.

[0033] like Figure 1As shown, in the technical solution of the first embodiment, the upper mold assembly 20 includes a first upper mold structure 21 and a second upper mold structure 22, the first upper mold structure 21 has a molding plane 211, the second upper mold structure 22 has a molding curved surface 221, and the molding plane 211 and the molding curved surface 221 together constitute a second molding surface. During use, the glass to be molded is first placed on the lower mold assembly 10, the first upper mold structure 21 is pressed down, the first upper mold structure 21 and the lower mold assembly 10 jointly clamp the glass to be molded, the glass is preheated to soften the glass, and the second upper mold structure 22 is pressed down to mold the curved surface area of ​​the glass. The upper mold assembly 20 is divided into the first upper mold structure 21 and the second upper mold structure 22, which reduces the mass of a single mold and further reduces the pressure on the glass. The curved surface molding parts are all arranged on the second upper mold structure 22, which ensures the continuity and surface smoothness of the curved surface after molding.

[0034] like Figure 1 and Figure 2 As shown, in the technical solution of the first embodiment, the lower mold assembly 10 also includes a first limiting structure 12, the first limiting structure 12 is connected to the molding structure 11, the first upper mold structure 21 has a first positioning portion, the first positioning portion is arranged corresponding to the first limiting structure 12, the first limiting structure 12 is movably arranged in the first positioning portion, and the first positioning portion is located on the side of the first upper mold structure 21 away from the second upper mold structure 22. The height of the upper surface of the first limiting structure 12 in the vertical direction is higher than the height of the first molding surface in the vertical direction. When the glass to be molded is placed on the first molding surface, the first limiting structure 12 limits the glass to prevent the glass from sliding along the inclined surface. The first positioning portion is a hole arranged corresponding to the first limiting structure 12. The size of the first positioning portion is slightly larger than the size of the first limiting structure 12, which is convenient for the movement of the first upper mold structure 21 in the vertical direction, and at the same time, it positions the first upper mold structure 21, ensuring the accuracy of the mold closing position.

[0035] like Figure 1 and Figure 2 As shown, in the technical solution of the first embodiment, the first limiting structure 12 includes a first groove 121, the groove width of the first groove 121 is greater than the thickness of the glass to be bent, and the side of the glass to be bent abuts against the bottom of the first groove 121. The first groove 121 limits the glass to prevent the glass from rotating and causing the glass position to shift.

[0036] like Figure 1 and Figure 3As shown, in the technical solution of the first embodiment, the lower mold assembly 10 further includes a second limiting structure 13, which is connected to the molding structure 11 and is arranged on both sides of the first molding surface. The first upper mold structure 21 has a second positioning portion 212, which is arranged corresponding to the second limiting structure 13, and the second limiting structure 13 is movably arranged in the second positioning portion 212. The height of the upper surface of the second limiting structure 13 in the vertical direction is higher than the height of the first molding surface in the vertical direction. The second limiting structure 13 limits the two sides of the glass to avoid the position deviation of the glass. The second positioning portion 212 is a hole arranged corresponding to the second limiting structure 13. The size of the second positioning portion 212 is slightly larger than the size of the second limiting structure 13, which facilitates the movement of the first upper mold structure 21 in the vertical direction, and at the same time plays a positioning role on the first upper mold structure 21, thereby ensuring the accuracy of the mold closing position.

[0037] like Figure 1 and Figure 3 As shown, in the technical solution of the first embodiment, the second limiting structure 13 includes a second groove 131, the groove width of the second groove 131 is greater than the thickness of the glass to be bent, and the glass to be bent is partially located in the second groove 131. The side of the glass is located inside the second groove 131, and the setting of the second groove 131 limits the rotation of the glass to avoid the position of the glass from being offset. During the glass molding process, the glass to be molded is first placed on the molding structure along the second groove 131, and the glass is partially located in the first groove 121. Under the joint action of the first groove 121 and the second groove 131, the glass will not rotate or move, and then the first upper mold structure 21 is controlled to be pressed down to complete the subsequent molding process.

[0038] like Figure 1 As shown, in the technical solution of the first embodiment, the molding structure 11 further includes a guide portion 14, and the second upper mold structure 22 includes a third positioning portion, which is arranged corresponding to the guide portion 14, and the guide portion 14 is movably arranged in the third positioning portion. The third positioning portion is a hole arranged corresponding to the guide portion 14, and the size of the third positioning portion is slightly larger than the size of the guide portion 14, so that the second upper mold structure 22 can move freely in the vertical direction, and at the same time, it plays a positioning role on the second upper mold structure 22, thereby ensuring the accuracy of the mold closing.

[0039] like Figure 1 As shown, in the technical solution of the first embodiment, the molding structure 11 includes a plurality of third grooves 111, and the plurality of third grooves 111 are respectively arranged corresponding to the plurality of upper mold structures. The arrangement of the third grooves 111 facilitates the control of the clamp of the upper mold structure to extend into, and facilitates the opening and closing of the mold.

[0040] like Figure 1As shown, in the technical solution of the first embodiment, the lower mold assembly 10 and the upper mold assembly 20 are made of ceramic material. Ceramic material has small thermal expansion, and is not prone to interference caused by thermal expansion or deformation of the molding surface. The oxidation temperature of ceramic material is much higher than the molding temperature of glass, and the surface material will not fall off during the hot bending process, resulting in poor appearance quality of the glass surface.

[0041] The difference between the technical solution of the second embodiment and the technical solution of the first embodiment is that the projection width of the first limiting structure 12 in the horizontal direction is greater than the projection width of the glass to be bent in the horizontal direction. This structure increases the base area between the first limiting structure 12 and the side of the glass, reduces the pressure on the glass, and reduces the deformation of the side of the glass.

[0042] From the above, it can be seen that the male mold assembly (lower mold assembly 10) is located at the lower part of the structure and is formed by ceramic materials. The first heating device performs heat transfer heating on the male mold assembly to ensure that it is completely in contact with the male mold forming surface during the hot-bent glass forming process; a replaceable limit block (first positioning part and second positioning part 212) is installed on the male mold to control the hot-bent glass to be fixed in the male mold position and the relative position of the female mold assembly (upper mold assembly 20) and the male mold to be fixed; the female mold assembly is located at the upper part of the structure and is formed by ceramic materials, and consists of two parts: a forming component (second upper mold structure 22) and a plane component (first upper mold structure 21); the plane component of the female mold is acted upon by the first pressure device to control the surface shape of the glass that does not need to be bent and deformed; the second heating device performs heat transfer heating on the forming component, the forming component performs thermal radiation heating on the glass, and controls the surface shape of the glass that needs to be bent and formed. The present application includes a male mold assembly, including an upwardly protruding male mold (molding structure 11), a strip-shaped limit block (a first limit block structure 12 and a second limit block structure 13), a cylindrical limit block (a guide portion 14), and a first heating device; the glass to be bent is placed on the male mold, the longitudinal position of the bent glass is limited by the longitudinal strip-shaped limit block, the width position is limited by the width strip-shaped limit block, and the horizontal position is limited by the male mold, and at the same time, the longitudinal strip-shaped limit block is designed with a groove to limit the longitudinal rotation of the glass to be bent. The present application includes a female mold assembly, a plane component, a first pressure device, a molding component, and a second heating device; the plane The strip hole inside the surface component and the strip limit block of the middle component of the punch assembly have a small gap to cooperate. The plane component can move vertically up and down. The plane component moves downward under the action of gravity until it is completely in contact with the glass, and the first pressure device is pressed down until the device is completely in contact with the upper surface of the plane component. A cylindrical hole is designed inside the molding component, and a small gap is left between the cylindrical hole of the molding component and the cylindrical limit block of the middle component of the punch assembly. The molding component moves up and down through the gap, and moves downward under the action of gravity until it is in contact with the glass. After the glass is elastically deformed by the gravity of the molding component, it is in a force equilibrium state. The bottom surface of the punch contacts the first heating device, and is heated by the device. The punch transfers the heat to the hot-bent glass through heat transfer and heat radiation. The forming part is radiated by the second heating device, and the forming part transfers the heat to the hot-bent glass through heat transfer and heat radiation. The glass is heated by the punch and the forming part, and the temperature rises until the glass reaches the deformation temperature and undergoes local plastic deformation. The glass is completely formed by the first pressure device of the flat part and the second heating device of the forming part. Keep the forming state for several minutes, slowly reduce the temperature of the first heating device and the second heating device, the mold temperature will drop immediately, the temperature of the hot-bent glass will drop to room temperature, and the shape of the glass will be fixed.

[0043] So far, the embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution of the present application.

[0044] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A small curvature hot bending glass mold, characterized in that: include: A lower mold assembly (10), the lower mold assembly (10) comprising a molding structure (11), the molding structure (11) having a first molding surface, the first molding surface being a convex surface; An upper mold assembly (20), the upper mold assembly (20) comprising a plurality of upper mold structures, the plurality of upper mold structures together forming a second molding surface, the second molding surface being a concave surface, the first molding surface and the second molding surface being consistent with the shape of the outer surface of the glass to be hot bent.

2. The small curvature hot-bending glass mold according to claim 1, characterized in that: The upper mold assembly (20) comprises a first upper mold structure (21) and a second upper mold structure (22); the first upper mold structure (21) has a molding plane (211), the second upper mold structure (22) has a molding curved surface (221), and the molding plane (211) and the molding curved surface (221) together constitute the second molding surface.

3. The small curvature hot-bending glass mold according to claim 2, characterized in that: The lower mold assembly (10) further comprises a first limiting structure (12), wherein the first limiting structure (12) is connected to the molding structure (11), and the first upper mold structure (21) comprises a first positioning portion, wherein the first positioning portion is arranged corresponding to the first limiting structure (12), and the first limiting structure (12) is movably arranged in the first positioning portion, and the first positioning portion is located on a side of the first upper mold structure (21) away from the second upper mold structure (22).

4. The small curvature hot-bending glass mold according to claim 3, characterized in that: The first limiting structure (12) comprises a first groove (121), the groove width of the first groove (121) is greater than the thickness of the glass to be heat-bent, and the side edge of the glass to be heat-bent abuts against the bottom of the first groove (121).

5. The small curvature hot-bending glass mold according to claim 3, characterized in that: The projection width of the first limiting structure (12) in the horizontal direction is greater than the projection width of the glass to be bent in the horizontal direction.

6. The small curvature hot-bending glass mold according to claim 2, characterized in that: The lower mold assembly (10) also includes a second limiting structure (13), the second limiting structure (13) is connected to the molding structure (11), the second limiting structure (13) is arranged on both sides of the first molding surface, the first upper mold structure (21) has a second positioning portion (212), the second positioning portion (212) is arranged corresponding to the second limiting structure (13), and the second limiting structure (13) can be movably inserted into the second positioning portion (212).

7. The small curvature hot-bending glass mold according to claim 6, characterized in that: The second limiting structure (13) comprises a second groove (131), the groove width of the second groove (131) is greater than the thickness of the glass to be heat-bent, and the glass to be heat-bent is partially located in the second groove (131).

8. The small curvature hot-bending glass mold according to claim 2, characterized in that: The molding structure (11) further comprises a guide portion (14), and the second upper mold structure (22) comprises a third positioning portion, the third positioning portion is arranged corresponding to the guide portion (14), and the guide portion (14) is movably arranged in the third positioning portion.

9. The small curvature hot-bending glass mold according to claim 1, characterized in that: The molding structure (11) comprises a plurality of third grooves (111), and the plurality of third grooves (111) are respectively arranged corresponding to the plurality of upper mold structures.

10. The small curvature hot-bending glass mold according to any one of claims 1 to 9, characterized in that: The lower mold assembly (10) and the upper mold assembly (20) are made of ceramic material.

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