CN113716846A

CN113716846A - Hot bending die and hot bending equipment

Info

Publication number: CN113716846A
Application number: CN202111084847.9A
Authority: CN
Inventors: 卢泽宇; 张世龙; 杨伟
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2021-09-15
Filing date: 2021-09-15
Publication date: 2021-11-30

Abstract

The application provides a curved mould of heat and curved equipment of heat for the messenger treats that processing glass is hot curved, the curved mould of heat includes first mould and second mould, and first mould has at least one die cavity, is equipped with the die cavity curved surface in the die cavity, and the die cavity curved surface is including the first plane and the first curved surface that are connected, and the normal direction of first plane is crossing with the thickness direction of first mould, the second mould with first mould sets up relatively, and second mould is equipped with at least one lug towards one side of first mould, and the lug has the curved surface of lug, and the curved surface of lug and die cavity curved surface are used for pressing respectively in treating processing glass's relative both sides and guide when hot curved and treat that processing glass is crooked. The application provides a hot-bending die makes whole glass to be processed's internal stress even relatively, and then avoids glass to be processed because the inhomogeneous skew phenomenon that produces of atress improves the shaping quality of the glass to be processed who has the curved surface that processes out.

Description

Hot bending die and hot bending equipment

Technical Field

The application relates to the technical field of mold processing, in particular to a hot bending mold and hot bending equipment.

Background

With the rapid development of 3D curved glass technology, 3D curved glass is applied more and more in various industries. The problem that the product is stressed unevenly and deviates easily in the hot bending process of the glass to be processed, so that the problem that the product is stressed unevenly and deviates in the hot bending process of the glass to be processed is effectively solved, and the technical problem to be solved is to improve the forming yield of the glass to be processed.

Disclosure of Invention

The application provides effectively avoid treating curved in-process product atress of processing glass uneven and produce the skew scheduling problem in the heat, improve the curved mould of heat and the curved equipment of heat of the shaping yields of treating processing glass.

In a first aspect, the present application provides a hot bending mold for hot bending glass to be processed, comprising:

the first mould is provided with at least one cavity, a cavity bending surface is arranged in the cavity, the cavity bending surface comprises a first plane and a first curved surface which are connected, and the normal direction of the first plane is intersected with the thickness direction of the first mould; and

the second mould is arranged opposite to the first mould, faces to at least one lug on one side of the first mould, and is provided with a lug bending surface, and the lug bending surface and the cavity bending surface are used for respectively pressing two opposite sides of the glass to be processed during hot bending and guiding the glass to be processed to be bent.

In a second aspect, the application provides a hot bending device, include board, pressure device, heating device and hot bending die, first mould is located on the board, pressure device's clamp plate is located the second mould deviates from one side of first mould, heating device is used for right hot bending die heating, pressure device is used for heating device heats and passes through when to predetermineeing the temperature the clamp plate is right hot bending die pressurization.

The utility model provides a hot curved mould and hot curved equipment, have at least one die cavity through setting up first mould, be equipped with the die cavity curved surface in the die cavity, the die cavity curved surface is including first plane and the first curved surface that is connected, the normal direction of first plane is crossing with the thickness direction of first mould, one side that the second mould faced first mould is equipped with at least one lug, the lug has lug curved surface, lug curved surface and die cavity curved surface are used for pressing in the relative both sides of waiting to process glass respectively and guide waiting to process glass bending when hot-bending, can realize in the hot-bending process, the part that corresponds to first plane and first curved surface all produces deformation on waiting to process glass, make whole waiting to process glass's internal stress relatively even, and then lead to the product atress inhomogeneous and produce the skew scheduling problem, improve the shaping yields of waiting to process glass.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a first hot-bending mold according to an embodiment of the present disclosure;

FIG. 2 is a first cross-sectional view of the hot bending mold and glass to be processed shown in FIG. 1;

FIG. 3 is a second cross-sectional view of the hot bending mold and glass to be processed shown in FIG. 1;

FIG. 4 is a cross-sectional view of the first mold shown in FIG. 3;

FIG. 5 is a cross-sectional view of a glass to be processed placed in the first mold shown in FIG. 4;

FIG. 6 is a cross-sectional view of a glass to be processed placed in a first mold of a second hot bending mold according to an embodiment of the present application;

FIG. 7 is a schematic view of the hot bend die of FIG. 1 shown in a disassembled configuration;

FIG. 8 is a cross-sectional view of a third hot-bending die according to an embodiment of the present application;

FIG. 9 is a cross-sectional view of a fourth hot-bending die of an embodiment of the present application;

FIG. 10 is a cross-sectional view of a fifth hot-bending die according to an embodiment of the present application;

FIG. 11 is a cross-sectional view of a sixth hot-bending die according to an embodiment of the present application;

FIG. 12 is a cross-sectional view of a seventh hot-bending die according to an embodiment of the present application;

FIG. 13 is a cross-sectional view of an eighth mold for hot bending in accordance with an embodiment of the present application;

FIG. 14 is a cross-sectional view of a ninth hot-bending die according to an embodiment of the present application;

FIG. 15 is a cross-sectional view of a tenth hot-bending die according to an embodiment of the present application;

FIG. 16 is a schematic perspective view of a hot-bending mold having two cavities according to an embodiment of the present application;

FIG. 17 is a cross-sectional view of the hot-bending die shown in FIG. 16;

FIG. 18 is a structural exploded view of a first die of the hot-bending die shown in FIG. 16;

FIG. 19 is a cross-sectional view of a first die of the hot-bending die shown in FIG. 18;

fig. 20 is a cross-sectional view of a hot bending apparatus according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 inventive step, are within the scope of the present disclosure.

Reference herein to "an embodiment" or "an implementation" means that a particular feature, structure, or characteristic described in connection with the embodiment or implementation can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

It should be noted that the terms "first", "second", and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions.

Referring to fig. 1, fig. 1 is a perspective view of a hot bending mold 1 according to the present application. Referring to fig. 2, fig. 2 is a cross-sectional view of a hot bending mold 1 and a glass 30 to be processed according to the present application.

The hot bending die 1 is used for hot bending the glass 30 to be processed. Optionally, the glass 30 to be processed includes, but is not limited to, a cover glass of a watch, a cover glass of a camera, a cover glass of a display screen of a mobile phone, and the like. In this embodiment, the glass 30 to be processed has at least one curved surface, for example, the glass 30 to be processed is single-side curved glass, or double-side asymmetric curved glass, or double-side symmetric curved glass, and the like.

The hot bending die 1 includes a first die 10 and a second die 20.

For convenience of description, the first perspective of the cross-sectional view of the first mold 10 in fig. 1 is defined as a reference, the longitudinal direction of the first mold 10 is the X-axis direction, and the width direction of the first mold 10 is the Y-axis direction (not shown). The thickness direction of the first mold 10 is the Z-axis direction.

The first mold 10 has at least one cavity 100.

Specifically, the first mold 10 has a substantially flat rectangular parallelepiped structure. Referring to fig. 2, the first mold 10 has a first top surface 120 and a first bottom surface 130 opposite to each other along the Z-axis direction. The cavity 100 is located at the first top surface 120. In other words, the cavity 100 is a groove opened on the first top surface 120.

A cavity curved surface 110 is arranged in the cavity 100. The cavity curved surface 110 is used for guiding a curved surface (for example, an outer surface or an inner surface) of the glass 30 to be processed to be curved when thermally bent.

Specifically, the bottom surface of the cavity 100 is a cavity curved surface 110, and the cavity curved surface 110 is used for guiding a curved surface to be bent (the curved surface to be bent is an inner surface or an outer surface of the glass 30 to be processed) of the glass 30 to be processed to be bent during hot bending. The glass to be processed 30 has an inner surface 32 and an outer surface 31 which are oppositely arranged. In fig. 2, the curved surface of the glass 30 to be processed is an outer surface 31 of the glass 30 to be processed. In other embodiments, the curved surface of the glass 30 to be processed may also be the inner surface 32 of the glass 30 to be processed.

In a first alternative embodiment, the cavity curved surface 110 includes a first plane surface 112 and a first curved surface 111 connected to each other. The normal direction of the first plane 112 intersects the thickness direction of the first mold 10. Wherein, the thickness direction of the first mold 10 is the Z-axis direction in fig. 1. The normal direction of the first plane 112 intersects the thickness direction of the first mold 10, and the normal direction of the first plane 112 (line F in fig. 2) intersects the Z-axis direction.

Optionally, the first curved surface 111 may be concave or convex. The first curved surface 111 in fig. 2 is a concave curved surface, and in other embodiments, the first curved surface 111 in fig. 2 may also be a convex curved surface.

Referring to fig. 3, the glass 30 to be processed has a first region 33 and a second region 34 which are adjacently disposed along the X-axis direction in fig. 2, the first region 33 corresponds to the first curved surface 111, and the second region 34 corresponds to the first plane 112.

The second mold 20 is disposed opposite to the first mold 10 in the Z-axis direction. Specifically, the second mold 20 includes a second top surface 220 and a second bottom surface 230, which are opposite to each other. Wherein the second bottom surface 230 of the second mold 20 faces the first top surface 120 of the first mold 10.

The second mold 20 is provided with at least one protrusion 200 on a side facing the first mold 10 (i.e., the second bottom surface 230). The bump 200 is protruded from the second bottom surface 230. The position of the projection 200 is opposite to the position of the cavity 100. The number of the protrusions 200 is the same as the number of the cavities 100. The shape of the projection 200 is adapted to the shape of the cavity 100.

The bump 200 has a bump curvature 210. Optionally, the shape of the convex bending surface 210 is conformal to the shape of the cavity bending surface 110. In other words, the extension direction of the bump curved surface 210 in the X-axis direction is the same as the extension direction of the cavity curved surface 110 in the X-axis direction. Of course, in other embodiments, the shape of the tab curved surface 210 is not conformal with the shape of the cavity curved surface 110 to form a shaped glass sheet.

The convex bending surface 210 and the cavity bending surface 110 are used for respectively pressing two opposite sides (along the Z-axis direction) of the glass 30 to be processed during hot bending and guiding the glass 30 to be processed to bend, so that at least part of the glass 30 to be processed is bent. Specifically, the convex block curved surface 210 and the cavity curved surface 110 are respectively pressed on the inner surface 32 and the outer surface 31 of the glass 30 to be processed during hot bending, so that the outer surface 31 of the glass 30 to be processed forms a surface conformal to the cavity curved surface 110, and the inner surface 32 of the glass 30 to be processed forms a surface conformal to the cavity curved surface 110. When the shape of the convex block bending surface 210 is conformal with the shape of the cavity bending surface 110, the glass 30 to be processed forms the glass 30 to be processed with uniform thickness.

Of course, in other embodiments, the shape of the convex bending surface 210 may not conform to the shape of the cavity bending surface 110, the outer surface 31 of the glass 30 to be processed forms a surface conforming to the cavity bending surface 110, and the inner surface 32 of the glass 30 to be processed forms a surface conforming to the convex bending surface 210, so as to match the requirements of some special shapes of the glass 30 to be processed.

The mold in the general technology is used for processing a glass product with a curved surface through a hot bending process, for example, the glass product is a local bending product, in the processing process, a part of area of the glass product is subjected to bending deformation, and the other part of area is not subjected to bending deformation, so that the whole stress of the whole glass product is uneven, the internal stress of the area subjected to the bending deformation is relatively large, the internal stress of the area subjected to the bending deformation deviates towards the area not subjected to the bending deformation, and then the end part not subjected to the bending deformation generates an extrusion head, and further the product yield of the glass product is reduced.

In the hot bending mold 1 provided by the present application, when hot bending is performed, the glass 30 to be processed is disposed in the cavity 100, and the outer surface 31 of the glass 30 to be processed faces the cavity bending surface 110 of the cavity 100. At least part of the bump 200 is arranged in the cavity 100, and the bump bending surface 210 of the bump 200 faces the inner surface 32 of the glass 30 to be processed. Since the normal direction of the first plane 112 (line F in fig. 2) intersects the Z-axis direction. The first plane 112 is an inclined plane with respect to the first bottom surface 130. When the glass 30 to be processed is placed in the cavity, a gap is formed between the glass 30 to be processed and the first plane 112 and the first curved surface 111. During the hot bending, the first region 33 of the glass 30 to be processed is deformed due to the requirement of conforming to the first curved surface 111, and the second region 34 of the glass 30 to be processed is deformed due to the requirement of conforming to the first plane 112, so that the first region 33 of the glass 30 to be processed and the second region 34 of the glass 30 to be processed are both deformed, the internal stress of the first region 33 of the glass 30 to be processed and the internal stress of the second region 34 of the glass 30 to be processed are relatively uniform, the deviation of the first region 33 of the glass 30 to be processed towards the second region 34 of the glass 30 to be processed is reduced, and the forming yield of the glass 30 to be processed is improved.

In other words, the hot bending mold 1 provided by the present application, by providing the first mold 10 with at least one cavity 100, the cavity 100 is internally provided with the cavity curved surface 110, the cavity curved surface 110 includes the first plane 112 and the first curved surface 111 connected to each other, the normal direction of the first plane 112 intersects with the thickness direction of the first mold 10, one side of the second mold 20 facing the first mold 10 is provided with at least one protrusion 200, the protrusion 200 has the protrusion curved surface 210, the protrusion curved surface 210 and the cavity curved surface 110 are respectively pressed on the two opposite sides of the glass 30 to be processed and guide the glass 30 to be processed to bend during hot bending, it can be realized that during hot bending, the portions of the glass 30 to be processed corresponding to the first plane 112 and the first curved surface 111 are both deformed, so as to make the internal stress of the whole glass 30 to be processed relatively uniform, further, the problem that the end of the processed glass 30 to be processed is extruded due to the fact that the glass 30 to be processed deviates due to uneven stress is avoided, and the forming quality of the processed glass 30 to be processed with a curved surface is improved.

Referring to fig. 4, a distance between an end of the first plane 112 away from the first curved surface 111 and the first bottom surface 130 is a first distance, i.e., a distance H1 in the Z-axis direction shown in fig. 4.

The distance between the end of the first plane 112 connected to the first curved surface 111 and the first bottom surface 130 is a second distance, i.e., a distance H2 in the Z-axis direction shown in fig. 4. The first distance H1 is greater than the second distance H2.

Optionally, the first curved surface 111 is a concave curved surface. The distance between the end of the first curved surface 111 away from the first plane 112 and the first bottom surface 130 is a third distance, i.e., a distance H3 in the Z-axis direction shown in fig. 4. The third distance H3 is greater than the second distance H2. Optionally, the third distance H3 may be equal to or different from the first distance H1, and the third distance H3 may be greater than or less than the first distance H1.

Referring to fig. 5, the first distance H1 is greater than the second distance H2, that is, the first plane 112 is an inclined plane with respect to the first bottom surface 130, and the normal direction of the first plane 112 intersects with the Z-axis direction. The first curved surface 111 is a concave curved surface.

When the glass 30 to be processed is placed in the cavity 100, two opposite ends of the glass 30 to be processed are respectively disposed at one end of the first curved surface 111 far away from the first plane 112, and one end of the first plane 112 far away from the first curved surface 111, thus, the glass 30 to be processed has a gap at the end connected with the first curved surface 111 by the first plane 112, during the hot pressing, the first region 33 and the second region 34 of the glass 30 to be processed are both subjected to bending deformation, in this way, the difference between the internal stress of the first region 33 of the glass 30 to be processed and the internal stress of the second region 34 of the glass 30 to be processed is small, the stress of the whole region of the glass 30 to be processed is relatively uniform, further, the phenomenon that the glass 30 to be processed deviates due to uneven stress is avoided, the problem that the end part of the processed glass 30 to be processed is extruded is reduced, and the forming quality of the processed glass 30 to be processed with a curved surface is improved.

Referring to fig. 6, of course, in a second alternative embodiment, the first distance H1 is smaller than the second distance H2. The first curved surface 111 is a convex curved surface.

Referring to fig. 4 again, the difference between the third distance H3 and the first distance H1 is less than or equal to a predetermined value. The preset value is less than or equal to 10mm, and the above data are only examples. Of course, the preset value can also be 0mm, 1mm, 3mm, 5mm, 9mm, etc.

Optionally, the third distance H3 is equal to the first distance H1 so that the glass 30 to be processed can lie flat on the cavity curved surface 110. In the flat laying process, two ends of the glass 30 to be processed are relatively stably supported, so that the glass 30 to be processed does not deviate or slide in the hot bending process.

Referring to fig. 7, the second mold 20 includes a second mold body 250 and at least one pressing block 240. Referring to fig. 3, the pressing block 240 is protruded from a side of the second mold body 250 away from the first mold 10. An orthographic projection of the pressing block 240 in the thickness direction (Z-axis direction) of the first mold 10 at least partially covers a region where the first curved surface 111 is located.

Optionally, the number of the pressing pieces 240 corresponding to the first curved surface 111 is 2, and the pressing pieces 240 are arranged at intervals along the Y-axis direction. Of course, in other embodiments, the number of the pressing blocks 240 may also be 1, 3, and the like, which is not limited in this application.

Optionally, referring to fig. 7, a side of the second mold body 250 facing away from the first mold 10 is provided with at least one pressing block cavity 260. The pressing block 240 is accommodated in the pressing block cavity 260 and a part of the pressing block 240 is exposed out of the pressing block cavity 260.

During the hot bending process, the pressing block 240 drives the second die body 250 to move towards the first die 10 under the action of the pressing plate. The pressing block 240 is partially exposed from the pressing block cavity 260 so that a gap is formed between the second mold body 250 and the pressing block 240 without being directly pressed by the pressing block 240.

Optionally, the pressing block 240 is detachably connected to the second mold body 250. When the pressing plate acts on the pressing block 240, the pressing block 240 is a stressed part, the pressing block 240 is prone to abrasion and fracture, the pressing block 240 is detachably connected with the second die body 250, so that the pressing block 240 is convenient to replace, the whole second die 20 does not need to be replaced, the service life of the second die 20 is prolonged, and the cost is reduced.

By arranging the pressing block 240 in the area corresponding to the first curved surface 111, the area where the pressing block 240 is located is an area with a large stress, and the pressing block 240 transmits a relatively large applied force to the first area 33 of the glass 30 to be processed corresponding to the first curved surface 111, so that the first area 33 of the glass 30 to be processed is deformed relatively greatly, and the glass 30 to be processed is convenient to form a curved surface area.

The size of the pressing block 240 along the X-axis direction is adjusted correspondingly with the size of the first curved surface 111 along the X-axis direction. Optionally, a dimension of the pressing block 240 in the X-axis direction is larger than a dimension of the first curved surface 111 in the X-axis direction. Optionally, the size of the pressing block 240 in the X-axis direction may also vary with the curvature of the first curved surface 111, for example, when the curvature is relatively large, the size of the pressing block 240 in the X-axis direction may be reduced, so that the acting area when the same pressure acts on the pressing block 240 is relatively small, and further the acting force of the area corresponding to the first curved surface 111 is relatively large, which is beneficial to the deformation of the glass 300 to be processed corresponding to the first curved surface 111. Optionally, the size of the pressing block 240 in the X-axis direction may also be changed along with the change of the curved surface length of the first curved surface 111, for example, when the curved surface length is relatively large, the size of the pressing block 240 in the X-axis direction may be increased, so that the acting area of the pressing block 240 is relatively large, and deformation of the glass 300 to be processed corresponding to the first curved surface 111 is facilitated.

The shape of the face of the pressing block 240 facing the first mold 10 includes at least one of a plane, a curved surface, and a bending surface, so that the pressing block 240 transmits the pressure to the glass 300 to be processed through the second mold body 250 via the plane, the curved surface, or the bending surface.

Referring to fig. 8, in a third alternative embodiment, the cavity curved surface 110 further includes a second curved surface 113. The first curved surface 111, the first plane 112 and the second curved surface 113 are connected in sequence. The curvature of the first curved surface 111 and the curvature of the second curved surface 113 may be equal or different. The hot bending operation can be correspondingly carried out on the glass 30 to be processed with the symmetrical curved surfaces on the two sides and the glass 30 to be processed with the asymmetrical curved surfaces on the two sides. Correspondingly, the glass 30 to be processed further has a third area 35, and the third area 35 corresponds to the position of the second curved surface 113.

Referring to fig. 8, the first curved surface 111 and the second curved surface 113 are symmetrical curved surfaces having the same curvature and the same curved surface length in the X-axis direction, and both the first curved surface 111 and the second curved surface 113 are concave surfaces facing the second mold 20.

The pressing blocks 240 are disposed on the second top surface 220 of the second mold 20 at positions corresponding to the second curved surface 113, and the number of the pressing blocks 240 may be equal to or different from the number of the pressing blocks 240 disposed corresponding to the first curved surface 111.

The convex block bending surface 210 and the cavity bending surface 110 are used for respectively pressing two opposite sides of the glass 30 to be processed during hot bending and guiding the glass 30 to be processed to bend. The normal direction of the first plane 112 intersects with the thickness direction of the first mold 10, so that the glass 30 to be processed corresponding to the first plane 112, the first curved surface 111 and the second curved surface 113 is deformed in the hot bending process, the internal stress of the whole glass 30 to be processed is relatively uniform, the problem that the end of the processed glass 30 to be processed is extruded due to the fact that the glass 30 to be processed is subjected to non-uniform stress is solved, and the forming quality of the processed glass 30 to be processed with the curved surface is improved.

Referring to fig. 9, in a fourth alternative embodiment, the first curved surface 111 and the second curved surface 113 are symmetrical curved surfaces, have the same curvature, and have the same curved surface length in the X-axis direction, and both the first curved surface 111 and the second curved surface 113 are convex surfaces facing the second mold 20.

Referring to fig. 10, in a fifth alternative embodiment, the first curved surface 111 and the second curved surface 113 are asymmetric curved surfaces, and have the same curvature but different curved surface lengths in the X-axis direction. The first curved surface 111 and the second curved surface 113 are both concave surfaces facing the second mold 20.

The pressing blocks 240 are disposed on the second top surface 220 of the second mold 20 at positions corresponding to the second curved surface 113, and the number of the pressing blocks 240 may be equal to or different from the number of the pressing blocks 240 disposed corresponding to the first curved surface 111. Because the curved surface length of the first curved surface 111 is greater than the curved surface length of the second curved surface 113, the size of the pressing block 240 corresponding to the second curved surface 113 is smaller than the size of the pressing block 240 corresponding to the first curved surface 111 along the X-axis direction.

The distance between the end of the first curved surface 111 away from the first plane 112 and the first bottom surface 130 is a third distance H3. The distance between the end of the second curved surface 113 away from the first plane 112 and the first bottom surface 130 is a fourth distance H4. The difference between the third distance H3 and the fourth distance H4 is less than or equal to a preset value. Optionally, the preset value is 0-10 mm.

Optionally, the third distance H3 is equal to the fourth distance H4, so that the glass 30 to be processed can be laid flat on the cavity curved surface 110. In the flat laying process, two ends of the glass 30 to be processed are relatively stably supported, so that the glass 30 to be processed does not deviate or slide in the hot bending process.

Referring to fig. 11, in a sixth alternative embodiment, the first curved surface 111 and the second curved surface 113 are symmetrical curved surfaces, have the same curvature but have different curved surface lengths in the X-axis direction, and both the first curved surface 111 and the second curved surface 113 are convex surfaces facing the second mold 20.

Referring to fig. 12, in a seventh alternative embodiment, the first curved surface 111 and the second curved surface 113 are asymmetric curved surfaces, the curvature and the length of the two curved surfaces are the same, but the curved directions of the two curved surfaces are different, the first curved surface 111 is a concave surface facing the second mold 20, and the second curved surface 113 is a convex surface facing the second mold 20. Of course, the first curved surface 111 may be a convex surface facing the second mold 20, and the second curved surface 113 may be a concave surface facing the second mold 20.

The distance between the end of the first curved surface 111 away from the first plane 112 and the first bottom surface 130 is a third distance H3. The distance between the supporting point of the second curved surface 113 supported on the glass 30 to be processed and the first bottom surface 130 is a fifth distance H5. The difference between the third distance H3 and the fifth distance H5 is less than or equal to a preset value. Optionally, the preset value is 0-10 mm.

Optionally, the third distance H3 is equal to the fifth distance H5 so that the glass 30 to be processed can lie flat on the cavity curved surface 110. In the flat laying process, two ends of the glass 30 to be processed are relatively stably supported, so that the glass 30 to be processed does not deviate or slide in the hot bending process.

Referring to fig. 13, in an eighth alternative embodiment, the first curved surface 111 and the second curved surface 113 are asymmetric curved surfaces and have different curvatures, the first curved surface 111 is a concave surface facing the second mold 20, and the second curved surface 113 is a convex surface facing the second mold 20.

The pressing blocks 240 are disposed on the second top surface 220 of the second mold 20 at positions corresponding to the second curved surface 113, and the number of the pressing blocks 240 may be equal to or different from the number of the pressing blocks 240 disposed corresponding to the first curved surface 111. When the curvature of the first curved surface 111 is smaller than that of the second curved surface 113, the size of the pressing block 240 corresponding to the second curved surface 113 is larger than the size of the pressing block 240 corresponding to the first curved surface 111 along the X-axis direction.

Referring to fig. 14, in a ninth alternative embodiment, the first curved surface 111 and the second curved surface 113 are asymmetric curved surfaces and have different curvatures, and both the first curved surface 111 and the second curved surface 113 are concave surfaces facing the second mold 20.

The pressing blocks 240 are disposed on the second top surface 220 of the second mold 20 at positions corresponding to the second curved surface 113, and the number of the pressing blocks 240 may be equal to or different from the number of the pressing blocks 240 disposed corresponding to the first curved surface 111. And the curvature of the first curved surface 111 is greater than that of the second curved surface 113, the size of the pressing block 240 corresponding to the second curved surface 113 is greater than that of the pressing block 240 corresponding to the first curved surface 111 along the X-axis direction. When the curvature is relatively large, the size of the pressing block 240 in the X-axis direction may be reduced, so that the acting area when the same pressure acts on the pressing block 240 is relatively small, and further, the acting force of the area corresponding to the first curved surface 111 is relatively large, which is beneficial to the deformation of the glass 300 to be processed corresponding to the first curved surface 111.

Referring to fig. 15, in a tenth alternative embodiment, the first curved surface 111 and the second curved surface 113 are asymmetric curved surfaces and have different curvatures, and both the first curved surface 111 and the second curved surface 113 are convex surfaces facing the second mold 20.

Referring to fig. 16 and 17, at least one of the cavities 100 includes a first cavity 100a and a second cavity 100b disposed adjacent to each other. A first cavity curved surface 110a is provided in the first cavity 100 a. The first cavity curved surface 110a includes a first sub-plane 142 and a first sub-curved surface 141 connected to each other. A second cavity curved surface 110b is provided in the second cavity 100 b. The second cavity curved surface 110b includes a second sub-plane 144 and a second sub-curved surface 143 connected to each other. The second sub-curved surface 143 is located between the first sub-curved surface 141 and the second sub-plane 144. The second sub-curved surface 143 is located at a side close to the first cavity 100 a.

The hot bending die 1 is provided with a plurality of cavities 100, so that a plurality of pieces of glass 30 to be processed can be subjected to hot bending operation at the same time, and the production efficiency of the hot bending die 1 can be improved.

Referring to fig. 16 and 17, at least one of the compacts 240 includes a first compact 240a and a second compact 240 b. The first pressing piece 240a and the second pressing piece 240b correspond to the first sub-curved surface 141 and the second sub-curved surface 143, respectively. The curvature of the second sub-curved surface 143 is the same as or different from the curvature of the first sub-curved surface 141. When the curvature of the second sub-curved surface 143 is equal to the curvature of the first sub-curved surface 141, the size of the first pressing piece 240a in the preset direction is equal to the size of the second pressing piece 240b in the preset direction. The predetermined direction is a direction (X-axis direction) in which the first cavity 100a points to the second cavity 100 b.

When the curvature of the second sub-curved surface 143 is greater than the curvature of the first sub-curved surface 141, the size of the first pressing piece 240a in the preset direction is smaller than the size of the second pressing piece 240b in the preset direction.

When the curvature of the second sub-curved surface 143 is greater than the curvature of the first sub-curved surface 141, the size of the first pressing block 240a along the X-axis direction is smaller than the size of the second pressing block 240b along the X-axis direction, so that the bending degrees of the portions of the glass 30 to be processed corresponding to the first sub-curved surface 141 and the second sub-curved surface 143 are different, the same hot bending mold 1 can be used for hot bending the glass 30 to be processed with different bending degree requirements, and the production efficiency of the hot bending mold 1 is improved.

When the curvature of the second sub-curved surface 143 is smaller than that of the first sub-curved surface 141, the size of the first pressing piece 240a in the preset direction is larger than that of the second pressing piece 240b in the preset direction.

Further, the second sub-curved surface 143 is disposed adjacent to the first sub-curved surface 141, so that the first pressing piece 240a corresponding to the first sub-curved surface 141 and the second pressing piece 240b corresponding to the second sub-curved surface 143 are collectively disposed, thereby reducing the area of the pressing piece provided on the pressing piece 240.

The above is an example in which the hot-bending die 1 has two cavities 100, and in other embodiments, the hot-bending die 1 may have three, four, and the like cavities 100.

Referring to fig. 18 and 19, the first mold 10 further includes a first mold body 11 and a ring insert 150. The first mold body 11 has a receiving groove 170. The first mold body 11 includes a protrusion 160 protruding from the bottom surface of the receiving groove 170. At least a portion of a surface of the protrusion 160 facing away from the bottom surface of the receiving groove 170 is the cavity curved surface 110. At least a portion of the ring insert 150 is disposed in the receiving groove 170 and is surrounded by the protrusion 160. The cavity of the annular insert 150 exposes the cavity curved surface 110. The annular insert 150 has an inner annular surface surrounding the inner cavity. The inner ring surface is used for surrounding the periphery of the glass 30 to be processed.

Referring to fig. 18 and 19, the ring insert 150 includes a first ring member 151 and a second ring member 152 connected in a thickness direction of the first mold 10. The first ring member 151 has a first inner annular surface 1511. The second ring 152 has a second inner annular surface 1521. The size of the lumen enclosed by the first inner annular surface 1511 is larger than the size of the lumen enclosed by the second inner annular surface 1521. The second ring 152 further has a step surface 153 connected between the first inner ring surface 1511 and the second inner ring surface 1521. An annular groove is formed between the circumferential side surface of the protrusion 160 and the circumferential side surface of the receiving groove 170. The first ring member 151 is disposed in the annular groove. The step surface 153 abuts against a surface of the protrusion 160 away from the bottom surface of the receiving groove 170.

The annular insert 150 may be an integrally formed structure or a plurality of inserts may be joined together. The annular insert 150 may be formed by splicing a plurality of single-sided inserts. Accordingly, the ring-shaped insert 150 formed by splicing the plurality of inserts can be adapted to the glass 30 to be machined with different sizes by replacing a single insert in a certain direction or a plurality of inserts in different directions.

It is understood that the annular insert 150 is detachably disposed in the receiving groove 170, and the inner annular surface of the annular insert 150 may vary in size. In other words, the receiving groove 170 can be adapted to the ring inserts 150 with different inner ring surface sizes, so as to facilitate the hot bending of the glass 30 to be processed with different outer contour sizes by the hot bending mold 1.

As shown in fig. 18, the inner cavity of the annular insert 150 is further provided with a clearance area for facilitating the glass 30 to be processed to be placed in the cavity 100 in a clamped state.

In addition, as shown in fig. 16, positioning grooves are formed on two side edges of the first mold 10, and positioning protrusions are formed on two side edges of the second mold 20, and the positioning protrusions are matched with the positioning grooves on the first mold 10 to guide and position the second mold 20 and the first mold 10 to be embedded with each other.

The hot bending die 1 provided by the application mainly comprises a first die 10, a second die 20, an annular insert 150 and a plurality of pressing blocks 240; the first mold 10 and the second mold 20 are sequentially arranged along the Z-axis direction, the first top surface 120 of the first mold 10 is designed with at least one cavity 100 matching with the outer surface 31 of the glass 30 to be processed, the first inner annular surface 1511 of the ring-shaped insert 150 is designed to be in a shape following with the shape of the glass 30 to be processed, and the ring-shaped insert 150 is assembled with the first mold 10 to play a role in positioning the glass 30 to be processed. The second top surface 220 of the second mold 20 is provided with a plurality of bumps 200 which are matched with the inner surface 32 of the glass 30 to be processed, the second bottom surface 230 of the second mold 20 is provided with at least one pressing block cavity 260, a pressing block 240 is assembled in the pressing block cavity 260 of the second top surface 220, the projection of the pressing block cavity 260 along the Z-axis direction at least partially covers the position of the first curved surface 111, and the pressing block 240 protrudes out of the second bottom surface 230 of the second mold 20. In the hot bending process, the bump 200 is pressed by a press plate of a hot bending machine, concentrated applied force acts on bending areas of the cavity bending surface 110 and the bump bending surface 210, the bending areas are matched with the first mold 10, and pressure is applied to the surface of the glass 30 to be processed at a high temperature state to form a hot bending product; the arc edge of the hot-bent product is smooth, a plurality of pieces of glass 30 to be processed can be synchronously hot-bent, the pressing block 240 can be replaced as soon as possible after the pressing block 240 is worn, and the service life of the hot-bending die 1 can be prolonged.

In the general technology, a single-mode single-hole hot bending die 1 is characterized in that the product is in central point symmetry, and an upper die is designed in an integrated mode; the prior art is that single mode mould production efficiency is low, and is required highly to structural design, and the product machining precision requires highly, and mould life hangs down the scheduling problem. According to the application, the same set of hot bending die 1 has a plurality of cavities 100 acting simultaneously, so that the production efficiency can be improved; the pressure block 240 is independently designed into a force-bearing vulnerable structure of the second die 20, so that the assembly and the use are convenient, the requirement on the processing precision is low, and the service life of the hot bending die 1 is prolonged; the size of the pressing block 240 along the X-axis direction can be adjusted to correspondingly apply different pressures, and the single-side and double-side bent asymmetric structure can be thermally bent.

Referring to fig. 20, the present application provides a hot bending apparatus 1000, which includes a machine table 50, a pressure device 40, a heating device 60, and a hot bending mold 1. The first mold 10 is disposed on the machine table 50. The pressing plate 41 of the pressing device 40 is arranged on the side of the second mold 20 facing away from the first mold 10. The heating device 60 is used for heating the hot bending die 1. The pressing device 40 is used for pressing the hot bending mold 1 through the pressing plate 41 when the heating device 60 is heated to the softening temperature of the glass 30 to be processed.

The foregoing is a partial description of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the protection scope of the present application.

Claims

1. A hot bending mould for hot bending glass to be processed, comprising:

the second mould is arranged opposite to the first mould, at least one lug is arranged on one side, facing the first mould, of the second mould, the lug is provided with a lug bending surface, and the lug bending surface and the cavity bending surface are used for respectively pressing two opposite sides of the glass to be processed and guiding the glass to be processed to be bent during hot bending.

2. A hot-bending die according to claim 1, wherein the surface of the first die on the side facing away from the second die is a first bottom surface, the first bottom surface is spaced apart from an end of the first flat surface facing away from the first curved surface by a first distance, the first bottom surface is spaced apart from an end of the first flat surface connecting the first curved surface by a second distance, and the first distance is greater than the second distance; the first curved surface is a concave curved surface.

3. The mold according to claim 2, wherein a distance between an end of the first curved surface away from the first flat surface and the first bottom surface is a third distance, and a difference between the third distance and the first distance is less than or equal to a predetermined value.

4. The hot-bending die of claim 1, wherein the cavity curved surface further comprises a second curved surface, the first plane and the second curved surface are connected in sequence, and the curvature of the first curved surface is equal to or different from the curvature of the second curved surface.

5. The hot bending die of claim 1, wherein the second die comprises a second die body and at least one pressing block, the pressing block is protruded on a side of the second die body facing away from the first die, and an orthographic projection of the pressing block in the thickness direction of the first die at least partially covers an area where the first curved surface is located.

6. A hot-bending die according to claim 5, wherein the second die body has at least one pressing block cavity on a side thereof facing away from the first die, the pressing block is accommodated in the pressing block cavity, a part of the pressing block is exposed from the pressing block cavity, and the pressing block is detachably connected to the second die body.

7. The hot bend die of claim 5, wherein a shape of a face of the compact facing a side of the first die includes at least one of a flat face, a curved face, and a bending face.

8. The hot-bending die according to claim 5, wherein at least one of the cavities comprises a first cavity and a second cavity which are adjacently arranged, a first cavity curved surface is arranged in the first cavity, the first cavity curved surface comprises a first sub-plane and a first sub-curved surface which are connected, a second cavity curved surface is arranged in the second cavity, the second cavity curved surface comprises a second sub-plane and a second sub-curved surface which are connected, and the second sub-curved surface is positioned between the first sub-curved surface and the second sub-plane.

9. The hot bend die of claim 8, wherein at least one of the compacts includes a first compact and a second compact, the first compact and the second compact corresponding to the first sub-curved surface and the second sub-curved surface, respectively, the curvature of the second sub-curved surface being the same as or different from the curvature of the first sub-curved surface; when the curvature of the second sub-curved surface is larger than that of the first sub-curved surface, the size of the first pressing block along the preset direction is smaller than that of the second pressing block along the preset direction, and the preset direction is the direction in which the first cavity points to the second cavity.

10. The hot-bending die according to any one of claims 1 to 9, wherein the first die further comprises a first die body and an annular insert, the first die body has a receiving groove, the first die body comprises a protrusion protruding from a bottom surface of the receiving groove, and at least a portion of a surface of the protrusion facing away from the bottom surface of the receiving groove is the cavity curved surface; at least part of the annular insert is arranged in the accommodating groove and is connected to the periphery of the bulge in a surrounding mode, the inner cavity of the annular insert is exposed out of the bending surface of the cavity, the annular insert is provided with an inner annular surface surrounding the inner cavity, and the inner annular surface is used for being connected to the periphery of the glass to be processed in a surrounding mode.

11. The hot bending die of claim 10, wherein the annular insert comprises a first ring member and a second ring member connected in a thickness direction of the first die, the first ring member having a first inner annular surface, the second ring member having a second inner annular surface, the first inner annular surface surrounding an inner cavity having a larger dimension than the second inner annular surface, the second ring member further having a step surface connected between the first inner annular surface and the second inner annular surface; an annular groove is formed between the peripheral side face of the protruding portion and the peripheral side face of the accommodating groove, the first ring-shaped member is arranged in the annular groove, and the step face abuts against the face, deviating from the bottom face of the accommodating groove, of the protruding portion.

12. The hot-bending die of claim 10, wherein the annular insert is formed as an integrally formed structure or a plurality of inserts joined together.

13. The mold of claim 10, wherein the cam curvature conforms to the cavity curvature, the cam curvature being disposed within the cavity of the annular insert during hot bending.

14. A hot bending device is characterized by comprising a machine table, a pressure device, a heating device and the hot bending die as claimed in any one of claims 1 to 13, wherein the first die is arranged on the machine table, a pressing plate of the pressure device is arranged on one side, away from the first die, of the second die, the heating device is used for heating the hot bending die, and the pressure device is used for pressurizing the hot bending die through the pressing plate when the heating device is heated to the softening temperature of glass to be processed.