TW201904890A - Glass hot bending mold - Google Patents

Abstract

The invention relates to a glass hot bending mould which comprises a male die and a female die, wherein the male die and the female die are matched with each other, bending mould bodies are formed in the peripheries of the male die and the female die, the bending mould bodies are used for forming a glass product, and the peripheries of the bending mould bodies have curvature. The glass hot bending mould further comprises a pressurizing device which is used for applying pressure in the direction of the male die on a central area of the glass product in a process that the male die and the female die approach to each other. Therefore, deformation, caused by external acting force generated when the female die presses to the male die, of the central area of the glass product is eliminated by pressure exerted on the central area of the glass product by the pressurizing device.

Description

Glass bending mould

The invention relates to the field of glass processing and molding, in particular to a glass hot bending mold.

At present, the mold for 3D mobile phone glass generally consists of a convex mold and a concave mold. During the processing of glass, the periphery of the glass is bent by heating and external pressure. But at the same time, under the influence of external pressure, the central area of the glass is inevitably deformed. As a result, the deformation of the central area of the glass will be fixed during the shaping process, and the deformation of the central area of the glass will affect the display of the mobile phone image.

The object of the present invention is to provide a glass hot-bending mold, which can effectively avoid the deformation of the central area during the glass product forming process.

In order to achieve the above object, the present invention provides a glass hot-bending mold, which includes a convex mold and a concave mold that cooperate with each other, and the peripheral edges of the convex mold and the concave mold are each formed with a curved edge mold having a curvature for molding glass products. Wherein, the glass hot-bending mold further includes a pressing device for applying a pressure in a direction toward the male mold toward a central area of the glass product during a process in which the male mold and the female mold are relatively close to each other.

Optionally, the pressing device includes a pressing rod and a pressing plate for attaching to the glass product, and the pressing rod can be relatively slidably passed through the concave mold to be vertically connected to the upper surface of the pressing plate. .

Optionally, the number of the pressing rods is plural, and the pressing rods are connected to the pressing plates at regular intervals.

Optionally, the number of the pressing rods is one, and the cross-sectional area of the pressing rods is consistent with the surface area of the pressing plate.

Optionally, the pressing rod is detachably connected to the pressing plate.

Optionally, a through hole for passing through the pressing rod is provided on the concave mold, and the pressing rod is matched with the through hole.

Optionally, the area of the pressing plate is not larger than the area of the central region of the glass product.

Optionally, a groove formed on the inner top wall of the die toward the pressing plate is received and fits into the shape of the pressing plate.

Optionally, the surface roughness of the pressing plate and the punch is not greater than 0.08 μm.

Optionally, the material of the male die, the female die and the pressing plate is graphite.

The effect of this technology is: in the process of gradually forming the peripheral surface of the glass product, at the same time, the pressure toward the central area of the glass product is applied by the pressing device to the direction of the convex mold, thereby eliminating the external force caused by the pressing of the concave mold to the convex mold , For the deformation of the central area of the glass product. In this way, under the condition that the curved surface of the glass product is ensured to be formed, the deformation problem of the center region of the glass product is effectively solved.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

As shown in FIG. 1 and FIG. 2, the present invention provides a glass hot bending mold, which includes a male mold 1 and a female mold 2 that cooperate with each other, and the peripheral edges of the male mold 1 and the female mold 2 are each formed with a curvature for forming a glass product 3 The peripheral bending mold, wherein the glass hot bending mold further includes a pressing device 4 for applying pressure toward the central portion of the glass product 3 toward the central area of the glass product 3 during the relatively close process of the convex mold 1 and the concave mold 2.

During the molding process of the glass product, the combined effect of the high temperature heating of the glass product 3 and the pressure applied by the concave mold 2 toward the convex mold 1 can gradually bend the peripheral edge of the glass product 3 to form a curved surface with a certain curvature. At this time, on the other hand, the central region of the glass product 3 also undergoes certain deformation under the above-mentioned pressure, such as warping. Therefore, in order to avoid deformation of the central region of the glass product 3 during the molding process When the pressing device 4 is relatively close to the convex mold 1 and the concave mold 2, the pressure device 4 applies pressure toward the central area of the glass product toward the convex mold 1 to eliminate the deformation of the central area of the glass product 3 and make it in the glass product. 3 During the molding process, it is not affected by the pressure of the concave mold 2 toward the convex mold 1, and is always maintained in a flat state without deformation such as warping, thereby ensuring the normal display of the mobile phone image.

Specifically, as shown in FIG. 1, the pressing device 4 includes a pressing rod 41 and a pressing plate 42 for attaching to the glass product 3. The pressing rod 41 can be slidably passed through the die 2 and is vertically connected to the pressing plate 42. surface. That is, the pressing plate 42 is located between the concave mold 2 and the convex mold 1, the pressing rod 41 is vertically connected to the pressing plate 42, and the concave mold 2 can pass through the pressing rod 41 and be attached to the pressing plate 42 freely. During the molding of the glass product, the pressing plate 42 is positioned above the glass product 3, and the pressure rod 41 applies a pressure in the direction of the convex mold 1 to the center region of the glass product 3, thereby eliminating deformation of the center region of the glass product 3 during the molding process. Among them, the orientation word "up" is defined in the up and down directions shown in the drawing of Fig. 1.

Among them, in order to ensure that the pressing plate 42 is uniformly subjected to the force of the pressing rod 41, as an implementation manner, the number of the pressing rods 41 may be multiple, and are respectively connected to the pressing plate 42 at regular intervals. That is, a plurality of pressing rods 41 are vertically connected to the pressing plate 42, and the pressing rods 41 are evenly arranged on the upper surface of the pressing plate 42 to ensure that the force of the pressing plate 42 is uniform.

As another implementation manner, the number of the pressing rods 41 may be one, and the cross-sectional area of the pressing rods 41 is consistent with the surface area of the pressing plate 42. For example, the upper surface of the pressing plate 42 may be formed in a circular shape, and the surface area of the circular shape is the same as the cross-sectional area of the pressing rod 41 and is the same shape and size.

In order to facilitate the mounting and dismounting of the pressure lever 41, in this embodiment, the pressure lever 41 is detachably connected to the pressure plate 42. For example, it may be a screw connection or the like.

In order to ensure the surface quality of the glass product 3, when the pressing rod 41 applies pressure to the pressing plate 42, the pressing rod 41 should always be perpendicular to the pressing plate 42. In the present embodiment, a through hole for passing through the pressing rod 41 is provided on the concave die 2, and the pressing rod 41 fits through the hole. Also, the pressing rod 41 and the die 2 are independent of each other, but they are restricted from each other. The die 2 can only move in the axial direction of the pressing rod 41, and the pressing rod 41 and the pressing plate 42 are always kept vertical. When the pressure plate 42 applies a pressure toward the center region of the glass product 3, the glass product 3 can be prevented from sliding, and defects of the glass product 3 at high temperatures can be prevented.

In order to prevent the pressing plate 42 from exerting a force on the edge of the glass product 3, in this embodiment, the area of the pressing plate 42 is not larger than the area of the central region of the glass product 3. Among them, the central region refers to the non-deformed region, and the peripheral edge of the glass product 3 refers to the deformed region. The pressure exerted by the pressure plate 42 on the central region prevents deformation in the central region. Therefore, the area of the pressing plate 42 only needs to act on the non-deformed region of the glass product 3.

Since a pressing device is added to the glass hot-bending mold, in order to ensure the deformation amount of the peripheral edge of the glass product 3, in this embodiment, the inner top wall of the concave mold 2 facing the pressing plate 42 is formed to accommodate and shapely cooperate with the pressing plate 42的 槽 21。 The groove 21. In this way, when the female die 2 is continuously pressed downward to the male die 1, the pressing plate 42 is received in the groove 21, and at this time, the pressing plate 42 and the female die 2 are integrated into one body, and the female die 2 can drive the pressing plate 42 to continue pressing the glass. Product 3, to ensure the deformation of the peripheral edge of the glass product 3.

In this embodiment, since the pressing plate 42 and the punch 1 are in direct contact with the glass product 3, in this embodiment, the surface roughness of the pressing plate 42 and the punch 1 is not greater than 0.08 μm. In other words, the smoothness of the surface of the pressing plate 42 and the punch 1 is at least 11 to prevent scratches on the glass products 3.

Since the glass product 3 is in a high temperature state during the molding process, in this embodiment, the material of the male mold 1, the female mold 2, and the pressing plate 42 is graphite. Graphite will not be deformed due to the temperature increase, and it will not cause other deformations of the glass product 3 due to the deformation of the mold itself during the molding process.

In summary, the present invention provides a glass hot-bending mold. The pressing device applies a pressure in the direction of the convex mold toward the central area of the glass product through a pressurizing device, thereby eliminating external forces generated by the pressing of the concave mold toward the convex mold. Deformation. In this way, under the condition that the curved surface of the glass product is ensured to be formed, the deformation problem of the center region of the glass product is effectively solved.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention. Simple variations all belong to the protection scope of the present invention.

In addition, it should be noted that the specific technical features described in the above specific embodiments can be combined in any suitable manner if there is no contradiction. In order to avoid unnecessary repetition, the present invention provides various possible combinations. The method is not explained separately.

In addition, various combinations of the embodiments of the present invention can also be arbitrarily combined, as long as it does not violate the idea of the present invention, it should also be regarded as the content disclosed by the present invention.

1‧‧‧ punch

2‧‧‧ die

3‧‧‧ glass products

4‧‧‧Pressure device

41‧‧‧ Stroke

42‧‧‧Press plate

21‧‧‧Groove

FIG. 1 is a cross-sectional view of a glass hot bending mold provided by the present invention. FIG. 2 is a schematic view of a top view of a glass hot bending mold provided by the present invention.

Claims (10)

A glass hot bending mold includes a male mold (1) and a female mold (2) that cooperate with each other, and the peripheral edges of the male mold (1) and the female mold (2) are formed with a glass for forming a glass product (3). The bending die with a peripheral edge of curvature, characterized in that the glass hot bending die further includes a device for facing the glass product (3) during the relatively close process of the male die (1) and the female die (2). A pressurizing device (4) for applying a pressure in the direction of the punch (1) in the central region. The glass hot bending mold according to claim 1, wherein the pressing device (4) includes a pressing rod (41) and a pressing plate (42) for attaching to the glass product (3), The pressing rod (41) is relatively slidably passed through the concave die (2) and is vertically connected to the upper surface of the pressing plate (42). The glass hot bending mold according to claim 2, wherein the number of the pressing rods (41) is plural, and the pressing rods (41) are connected to the pressing plates (42) at regular intervals. The glass hot bending mold according to claim 2, wherein the number of the pressing rods (41) is one, and the cross-sectional area of the pressing rods (41) and the surface area of the pressing plates (42) Consistent. The glass hot-bending mold according to claim 2, wherein the pressing rod (41) is detachably connected to the pressing plate (42). The glass hot-bending mold according to any one of claims 2-5, wherein the concave mold (2) is provided with a through hole for passing through the pressing rod (41), and the pressing rod (41) A clearance fit with the through hole. The glass hot bending mold according to claim 6, wherein the area of the pressing plate (42) is not larger than the area of the central area of the glass product (3). The glass hot-bending mold according to claim 2, characterized in that the inner top wall of the female mold (2) facing the pressure plate (42) is formed with a groove that is received and fits the shape of the pressure plate (42) (twenty one). The glass hot bending mold according to claim 2, wherein the surface roughness of the pressing plate (42) and the convex mold (1) is not greater than 0.08 μm. The glass hot-bending mold according to claim 2, wherein the material of the convex mold (1), the concave mold (2), and the pressing plate (42) is graphite.