CN110862222A - Hot bending die and hot bending preparation process of glass cover plate - Google Patents
Hot bending die and hot bending preparation process of glass cover plate Download PDFInfo
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- CN110862222A CN110862222A CN201911240584.9A CN201911240584A CN110862222A CN 110862222 A CN110862222 A CN 110862222A CN 201911240584 A CN201911240584 A CN 201911240584A CN 110862222 A CN110862222 A CN 110862222A
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- glass cover
- cover plate
- processed
- hot
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
- C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
- C03B23/0302—Re-forming glass sheets by bending by press-bending between shaping moulds between opposing full-face shaping moulds
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B23/00—Re-forming shaped glass
- C03B23/02—Re-forming glass sheets
- C03B23/023—Re-forming glass sheets by bending
Abstract
The invention provides a hot bending die and a hot bending preparation process of a glass cover plate, wherein hot bending is carried out for 2 times, a first groove and a second groove which are oppositely arranged are adopted during the hot bending for 2 times, and a removable die piece which can be placed and taken out on the second surface of the glass cover plate to be processed is matched, so that the hot bending forming can be carried out on the glass cover plate to be processed, the first die cavity and the second die cavity can be smoothly demoulded, and the glass cover plate product with the inwards bent edge can be obtained.
Description
Technical Field
The invention relates to the technical field of hot bending processes, in particular to a hot bending die and a glass cover plate hot bending preparation process.
Background
The glass cover plate is the protective glass, and along with the upgrading of product requirements, the market also has higher and higher requirements on the glass cover plate. At present, the market generally divides the glass cover plate into a flat glass cover plate and a non-flat glass cover plate, wherein the middle area of the non-flat glass cover plate can be a flat surface (2.5D glass cover plate) or a cambered surface (3D glass cover plate), and the edge part of the glass cover plate adopts a cambered surface transition. The non-planar glass cover plate has the advantages that the appearance attractiveness of products is greatly improved, the experience of a user in touch screen operation is improved, and therefore the non-planar glass cover plate is widely applied to intelligent electronic products such as smart phones, tablet computers and smart watches.
Referring to fig. 1, a schematic diagram of a conventional hot bending mold is shown. The hot bending die 10 can be used for preparing a 3D glass cover plate 19 with an edge part adopting arc surface transition by a flat glass cover plate through a hot bending process.
The hot bending mold 10 includes a lower mold 11 and an upper mold 12. The lower die 11 is provided with a groove 111, the upper surface 1111 of the groove 111 is an arc surface, two opposite corners of the groove are respectively provided with an arc surface edge 1112, and the upper surface 1111 of the groove 111 is in contact with a glass cover plate to be processed. The upper die 12 is provided with a boss 121 matched with the groove 111, the lower surface 1211 of the boss 121 is an arc surface, four corners of the arc surface 1211 are respectively provided with an arc surface edge 1212, and the lower surface 1211 of the boss 121 is in contact with the glass cover plate to be processed.
Placing a glass cover plate to be processed on the groove 111, heating the hot bending die 10 and the glass cover plate to be processed, and applying pressure to the upper die 12 and/or the lower die 11 to enable the upper die 12 and the lower die 11 to be matched, so that the glass cover plate to be processed is subjected to hot bending forming; and then cooling and demolding the hot bending mold 10 to obtain the 3D glass cover plate 19. Since the edge curvature of the 3D glass cover plate 19 is less than or equal to 90 degrees, the upper mold 12 and the lower mold 11 can be normally demolded. The edge radian of the 3D glass cover plate 19 is less than or equal to 90 degrees, which means that an included angle between a tangent line of the periphery of the edge of the 3D glass cover plate 19 and the cover plate main body is less than or equal to 90 degrees, that is, the edge of the 3D glass cover plate is bent outwards or is a right-angled wall.
Due to the complexity of the hot bending process, the prior art 3D glass cover plate typically has an edge curvature less than or equal to 90 degrees. In order to improve the application scope of the 3D glass cover plate and improve the market competitiveness of products, the edge radian of the 3D glass cover plate is larger than 90 degrees for partial products, namely the edge of the 3D glass cover plate is bent inwards to form an inverted buckle shape, and the existing die cannot realize hot bending forming. And because the structure of the mould and the equipment limits, the 3D glass cover plate in the shape of the inverted buckle is formed after the hot bending, so that the upper mould and the lower mould of the hot bending mould cannot be demoulded, and the production of the 3D glass cover plate with the inwards bent edge is difficult.
Therefore, it is desirable to improve the hot bending mold to manufacture a 3D glass cover plate with an inward bent edge.
Disclosure of Invention
The invention aims to provide a hot bending die and a glass cover plate hot bending preparation process, which can be used for manufacturing a non-planar glass cover plate with an inward bent edge so as to improve the market competitiveness of a product.
In order to achieve the above object, the present invention provides a hot bending die including: the first die cavity is provided with a first groove, the first groove comprises a first end surface and two oppositely arranged first side surfaces, the first end surface is in contact with a first surface of the component to be machined, and the first side surfaces comprise first cambered surfaces close to the first end surface; the second die cavity is provided with a second groove, the second groove comprises a second end face and two oppositely arranged second side faces, the second side faces comprise second cambered surfaces close to the second end face, and the second cambered surfaces are matched with the first cambered surfaces and are matched with the edges of the components to be processed; the removable mold piece comprises a first contact surface, a second contact surface and two opposite third arc surfaces arranged between the first contact surface and the second contact surface, the first contact surface is in contact with the second surface of the component to be machined, the second contact surface is in contact with the second end surface of the second groove, and the third arc surfaces are matched with the edge of the component to be machined, wherein the second surface of the component to be machined is arranged opposite to the first surface; at the beginning of a hot bending operation, the removable mold piece is placed on the second surface of the component to be processed; after the hot-bending forming, the removable mold piece is removed from the hot-bent assembly product, thereby obtaining the assembly product with the inward-bent edge.
In order to achieve the above object, the present invention further provides a glass cover plate hot bending preparation process, which comprises the following steps: (1) providing the hot bending die and a glass cover plate to be processed, wherein the radian of one edge of the glass cover plate is less than or equal to 90 degrees; (2) placing the glass cover plate to be processed in a first groove of a first die cavity of the hot bending die, enabling a first surface of the glass cover plate to be processed to be in contact with a first end surface of the first groove, and enabling an outer surface of an arc-shaped edge of the glass cover plate to be processed to be attached to a first arc surface of the first groove; (3) placing the removable mold piece of the hot bending mold on the second surface of the glass cover plate to be processed, and enabling the inner surface of the arc-shaped edge of the glass cover plate to be processed to be attached to the third arc surface of the removable mold piece; (4) placing a second die cavity of the hot bending die on the first die cavity, heating and applying pressure to enable the second die cavity and the first die cavity to be matched, and further enabling the glass cover plate to be processed to be subjected to hot bending forming to form a glass cover plate product with an inward bent edge; (5) and cooling and demolding, taking out the removable mold piece in the glass cover plate product, and obtaining the glass cover plate product with the edge bent inwards.
The invention has the advantages that: according to the invention, the hot bending is carried out for 2 times, and the first groove and the second groove which are oppositely arranged are adopted during the hot bending for 2 times, and the removable mold piece which can be placed and taken out on the second surface of the glass cover plate to be processed is matched, so that the glass cover plate to be processed can be subjected to hot bending forming, the first mold groove and the second mold groove can be smoothly demolded, and a glass cover plate product with an inwards bent edge can be obtained; further through the mould spare of formula of can getting of adopting integrated configuration, reduced the friction between formula of can getting and putting mould spare and the glass apron product, avoided leading to the fact the fish tail to glass apron product and formula of can getting and putting mould spare to avoid the product bad, and avoid the influence to the life of formula of can getting and putting mould spare.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic view of a conventional hot bending mold;
FIG. 2 is a schematic plan view of a first embodiment of the hot-bending die of the present invention;
FIG. 3 is a schematic plan view of a second embodiment of the hot bending die of the present invention;
FIG. 4A is a schematic plan view of a third embodiment of the hot-bending die of the present invention;
FIG. 4B is a schematic perspective view of the first cavity of FIG. 4A;
FIG. 5 is a schematic view of the steps of the process for manufacturing a glass cover plate according to the present invention;
FIGS. 6A to 6E are process flow diagrams of a first embodiment of a hot bending process for manufacturing a glass cover plate according to the present invention;
fig. 7A to 7C are partial process flow diagrams of a second embodiment of the glass cover plate hot bending manufacturing process according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar components or components having the same or similar functions throughout. The directional phrases used in this disclosure include, for example: up, down, left, right, front, rear, inner, outer, lateral, etc., are simply directions with reference to the drawings. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. The embodiments described below by referring to the drawings and directional terms used are exemplary only, are used for explaining the present invention, and are not construed as limiting the present invention.
Referring to fig. 2, a schematic plan view of a hot bending mold according to a first embodiment of the present invention is shown. The hot bending die 20 of the present embodiment is used for hot bending a component to be processed (not shown). The hot-bending die 20 includes a first cavity 21, a second cavity 22, and a removable die member 23. The component to be processed comprises a first surface and a second surface which are oppositely arranged. The following embodiments are described by taking a glass cover plate to be processed as an example, wherein a first surface of the glass cover plate to be processed is a surface facing a user, and a second surface of the glass cover plate to be processed is a surface facing a display module; the radian of the edge of the glass cover plate to be processed is less than or equal to 90 degrees (namely a semi-finished product formed by one-time hot bending).
The first mold cavity 21 is provided with a first groove 211, the first groove 211 comprises a first end surface 2111 and a first side surface, the first end surface 2111 is in contact with a first surface of the glass cover plate to be processed, and the first side surface comprises a first arc surface 2112 close to the first end surface 2111. Specifically, the first groove 211 is disposed in the middle of the first cavity 21, a portion of the first side surface close to the first end surface 2111 is bent toward the first end surface 2111 to form a first arc surface 2112, and an edge radian of the first arc surface 2112 (and an included angle between a tangent of the first arc surface and the first end surface 2111) is greater than 90 degrees. After hot pressing, the part of the outer side of the edge of the glass cover plate product, which is close to the cover plate main body, is attached to the first cambered surface 2112.
The second cavity 22 has a second groove 221, the second groove 221 includes a second end face 2211 and a second side face, the second side face includes a second arc face 2212 close to the second end face 2211, and the second arc face 2212 is matched with the first arc face 2112 and is matched with the edge of the glass cover plate to be processed. Specifically, the second groove 221 is disposed in the middle of the second cavity 22, a portion of the second side surface close to the second end surface 2211 is bent toward the second end surface 2211 to form a second arc surface 2212, and an edge radian of the second arc surface 2212 (an included angle between a tangent of the second arc surface and the second end surface 2211) is greater than 90 degrees. After hot pressing, the part of the outer side of the edge of the glass cover plate product, which is far away from the cover plate body, is attached to the second arc surface 2212.
In a further embodiment, the first concave groove 211 and the second concave groove 221 are disposed opposite to each other to form a receiving cavity for receiving the glass cover plate to be processed and the removable mold element 23, so that the shape of the second cavity 22 is adapted to the shape of the first cavity 21, so that the second arc surface 2212 and the first arc surface 2112 can be matched. The first cavity 21 and the second cavity 22 may be connected by bolts.
In a further embodiment, the size of the removable mold 23 is slightly smaller than the size of the receiving cavity formed by the first groove 211 and the second groove 221, so that a space is left for placing the glass cover plate to be processed.
The removable mold element 23 comprises a first contact surface 2301, a second contact surface 2302 and two opposite third arc surfaces 2303 arranged between the first contact surface 2301 and the second contact surface 2302, wherein the first contact surface 2301 is in contact with the second surface of the glass cover plate to be processed, the second contact surface 2302 is in contact with the second end surface 2211 of the second groove 22, and the third arc surfaces 2303 are adapted to the edge of the glass cover plate to be processed. After hot pressing, the inner side of the edge of the glass cover plate product is attached to the third cambered surface 2303.
The removable mold member 23 can be placed on the second surface of the glass cover plate to be processed, and can be removed from the second surface of the glass cover plate product after hot bending (which is the same surface as the second surface of the glass cover plate to be processed). Specifically, at the beginning of the hot bending operation, the removable mold element 23 is placed on the second surface of the glass cover plate to be processed; after the hot-bending, the removable mold piece 23 is removed therefrom, thereby obtaining a glass cover sheet product with an inwardly bent edge. The glass cover plate product with the inward bent edge refers to a glass cover plate product with the bending angle of the peripheral edge larger than 90 degrees, so that the edge of the glass cover plate product is close to the inside of the product.
In a further embodiment, the removable mold member 23 is a one-piece structure. In particular, at the beginning of the hot bending operation, the removable mold element 23 can be placed directly on the second surface of the glass cover plate to be processed; after the hot bending forming, the glass cover plate product including the integrally formed removable mold part 23 is taken out through demolding, and then the removable mold part 23 is moved in an integrally formed manner along the length direction of the second surface until the removable mold part 23 is moved out of the second surface, so that the glass cover plate product with the inward bent edge is obtained.
In a further embodiment, the first end 2111 of the first recess 211 and the first contact surface 2301 of the removable mold piece 23 are planar. The glass cover plate to be processed is deformed after being subjected to hot bending and pressing, the middle area of the glass cover plate is a plane, and the edge of the glass cover plate is deformed into a cambered surface with the radian larger than 90 degrees, namely, the formed glass cover plate product is a 2.5D glass cover plate with the edge bent inwards.
In a further embodiment, the first end surface 2111 of the first groove 211 and the first contact surface 2301 of the removable mold element 23 are both curved and are adapted. The glass cover plate to be processed deforms after being subjected to hot bending and pressed, the middle area of the glass cover plate is an arc surface, and the radians of the glass cover plate to be processed are matched with those of the first end surface 2111 and the first contact surface 2301; the edge of the glass cover plate is deformed into an arc surface with the radian larger than 90 degrees, namely, the formed glass cover plate product is a 3D glass cover plate with the edge bent inwards.
According to the invention, the first groove 211 and the second groove 221 which are arranged oppositely are matched with the removable mold part 23 which can be placed and taken out on the second surface of the glass cover plate to be processed, so that the glass cover plate to be processed can be subjected to hot bending forming, a glass cover plate product with an inward bent edge can be obtained, and the first mold cavity 21 and the second mold cavity 22 can be smoothly demolded.
Referring to fig. 3, a schematic plan view of a second embodiment of the hot bending mold according to the present invention is shown. The difference from the embodiment shown in fig. 2 is that, in the hot-bending die 20a of the present embodiment, the first side surface of the first groove 211a includes a first arc surface 2112a close to the first end surface 2111a, and a first step-like side surface 2113a away from the first end surface 2111 a; accordingly, the second side of the second groove 221a includes a second arc-shaped surface 2212a close to the second end surface 2211a, and a second step-shaped side 2213a far from the second end surface 2211 a; wherein the second stepped side 2213a mates with the first stepped side 2113 a.
The first die cavity 21a and the second die cavity 22a can be connected by bolts; the second step-shaped side 2213a may be engaged with the first step-shaped side 2113a, and a bolt (not shown) may be used to achieve the connection.
In this embodiment, the removable mold member 23a is a combined structure, and includes a first sub-mold member 231a, a second sub-mold member 232a, and at least one middle mold member 233a, wherein the middle mold member 233a is disposed between the first sub-mold member 231a and the second sub-mold member 232a, and can move along a direction perpendicular to a plane where the first sub-mold member 231a and the second sub-mold member 232a are located. After the hot-bending molding, the glass cover plate product including the removable mold member 23a of the combined structure is taken out by demolding, and then the intermediate mold member 233a is moved in a direction perpendicular to the second surface of the glass cover plate product and the same surface as the second surface of the glass cover plate to be processed) to take out the intermediate mold member 233 a; and then, translating the first sub-mold member 231a and the second sub-mold member 232a to the middle of the second surface, so that the first sub-mold member 231a and the second sub-mold member 232a are separated from the arc-shaped edge of the glass cover plate product, and then taking out the first sub-mold member 231a and the second sub-mold member 232a, thereby obtaining the glass cover plate product with the inward bent edge. It should be noted that the number of the intermediate mold members 233a is not limited in the present invention, and may be 1 or more.
Through modular structure can get formula of putting mould spare 23a, can reduce can get the friction of the second surface of formula of putting mould spare 23a and glass apron product, avoid reaching glass apron product can get formula of putting mould spare 23a and cause the fish tail to avoid the product bad, and avoid the influence to the life that can get formula of putting mould spare.
Fig. 4A to fig. 4B are also shown, in which fig. 4A is a schematic plan view of a hot bending mold according to a third embodiment of the present invention, and fig. 4B is a schematic perspective view of the first cavity in fig. 4A. The difference from the embodiment shown in fig. 3 is that in the hot bending mold 20b of the present embodiment, at least one clamping interface 212b is disposed on the first mold cavity 21b, and a clamping member 222b adapted to the clamping interface 212b is disposed on the second mold cavity 22 b. The second step-shaped side 2213b is clamped with the first step-shaped side 2113b, and the clamping interface 212b is clamped with the clamping piece 222b, so that the first die cavity 21b is connected with the second die cavity 22 b. It should be noted that, the number of the card interfaces 212b and the card elements 222b is not limited in the present invention, and may be 1 or more, as long as they are adapted.
In further embodiments, the removable mold member 23b may be an integral structure or a combined structure (in the drawings, the dashed line in the removable mold member 23b indicates that it may include a plurality of mold members).
Referring to fig. 5 and fig. 6A to 6E together, fig. 5 is a schematic step diagram of a hot bending process for manufacturing a glass cover plate according to the present invention, and fig. 6A to 6E are process flow diagrams of a first embodiment of the hot bending process for manufacturing a glass cover plate according to the present invention.
Regarding step S51: a hot bending mold according to the present invention and a glass cover plate to be processed are provided, please refer to fig. 5. In this embodiment, the hot bending mold is the hot bending mold 20b shown in fig. 4A, and the removable mold piece 23b is an integrally formed structure; the edge of the glass cover plate 691 (shown in fig. 6A) to be processed is a 90-degree right-angle wall, i.e., a semi-finished product after one-time hot bending. It should be noted that the radian of the edge of the glass cover plate 691 to be processed may be less than or equal to 90 degrees. The edge radian of the glass cover plate 691 to be processed means an included angle between a tangent line of the periphery of the edge and the cover plate main body, wherein the edge radian is less than or equal to 90 degrees, namely the edge is bent outwards or is a right-angled wall. An appropriate hot bending mold can be selected for adaptation according to the shape of the glass cover plate 691 to be processed and the specification requirements of the product.
In a further embodiment, the glass cover plate 691 to be processed with an edge curvature less than or equal to 90 degrees may be obtained by hot bending a 2D glass. Specifically, the 2D glass may be taken out after being subjected to hot bending molding by using the conventional hot bending mold shown in fig. 1. That is, the glass cover sheet hot-bending manufacturing process of the present invention can obtain the glass cover sheet product 692 with the edge bent inward (shown in fig. 6E) by performing 2 hot-bending operations on 2D glass, and can also perform one hot-bending operation on the existing glass cover sheet 691 to be processed with a certain edge curvature, so as to obtain the glass cover sheet product 692 with the edge bent inward.
Regarding step S52: placing the glass cover plate to be processed in the first groove of the first cavity of the hot bending mold, and contacting the first surface of the glass cover plate to be processed with the first end surface of the first groove, and attaching the outer surface of the arc-shaped edge of the glass cover plate to be processed with the first arc surface of the first groove, please refer to fig. 5 and fig. a together, wherein fig. 6A is a schematic plane structure diagram after executing this step. The first surface of the glass cover plate 691 to be processed is in contact with the first end surface 2111b of the first groove 211b so as to be attached after hot pressing; the portion of the periphery of the edge of the glass cover plate 691 to be processed, which is close to the first surface, is in contact with the first cambered surface 2112b of the first groove 211b, so as to be attached after hot pressing.
The first cavity 21b is further provided with four clamping interfaces 212b (2 are shown in the schematic plan view, and 4 are shown in fig. 6D) for clamping with the clamping pieces 222b on the second cavity 22 b. Also, the first side surface further includes a first stepped side surface 2113b for mating with a second stepped side surface 2213b on the second cavity 22 b.
Regarding step S53: please refer to fig. 5 and fig. 6B together, where fig. 6B is a schematic plan view illustrating a structure after the step is performed, in which the removable mold piece of the hot bending mold is placed on the second surface of the glass cover plate to be processed, and the inner surface of the arc-shaped edge of the glass cover plate to be processed is attached to the third arc surface of the removable mold piece. The first contact surface 2301b of the removable mold piece 23b is in contact with the second surface of the glass cover plate 691 to be processed, so as to be attached to the glass cover plate 691 after hot pressing; the part of the third arc surface 2303b of the removable mold element 23b close to the first contact surface 2301b is in contact with the part of the periphery of the edge of the glass cover plate 691 to be processed close to the first surface, so as to be attached after hot pressing; meanwhile, after hot pressing, the part of the periphery of the edge of the glass cover plate 691 to be processed, which is far away from the first surface, is attached to the part, close to the second contact surface 2302b, of the third cambered surface 2303b of the removable mold element 23 b; that is, the edge of the hot-bent glass cover sheet product 692 is bent inward, and the bent shape is adapted to the shape of the third cambered surface 2303b of the removable mold element 23 b.
In a further embodiment, the first end surface 2111b of the first recess 211b and the first contact surface 2301b of the removable mold piece 23b are planar. Then, the glass cover plate 691 to be processed is deformed after being subjected to hot bending and pressing, the middle area thereof is a plane, and the edge thereof is deformed into an arc surface with a radian larger than 90 degrees, that is, the formed glass cover plate product 692 is a 2.5D glass cover plate with an inwardly bent edge.
In a further embodiment, the first end surface 2111b of the first recess 211b and the first contact surface 2301b of the removable mold element 23b are both curved and are adapted. The glass cover plate 691 to be processed is deformed after being subjected to hot bending and pressing, the middle area of the glass cover plate 691 is an arc surface, and the radian of the glass cover plate is matched with the radians of the first end surface 2111b and the first contact surface 2301 b; its edge deformation is an arc of greater than 90 degrees in curvature, i.e., the molded glass cover sheet product 692 is a 3D glass cover sheet with an inwardly bent edge.
Regarding step S54: placing the second cavity of the hot bending mold on the first cavity, heating and applying pressure to match the second cavity with the first cavity, and further hot bending and forming the glass cover plate to be processed to form a glass cover plate product with an inward bent edge, please refer to fig. 5 and 6C together, where fig. 6C is a schematic plan view after executing this step.
Specifically, the mold clamping force is applied when the heating temperature reaches the glass transition point temperature of the glass cover plate 691 to be processed; when the second cavity 22b and the first cavity 21b are fully closed, the glass cover 69 to be processed is finally formed into a glass cover product 692 with the desired inward bent edges.
Regarding step S55: cooling and demolding, and taking out the removable mold piece from the glass cover plate product to obtain the glass cover plate product with the edge bent inward, please refer to fig. 5 and fig. 6D-6E together, where fig. 6D is a schematic diagram of a removal operation of the removable mold piece, and fig. 6E is a schematic diagram of a planar structure of the glass cover plate product obtained by the present invention.
And slowly cooling the hot bending mould (the cooling rate is controlled within a preset range) so as to prevent the glass cover plate from generating stress due to sudden temperature drop in the cooling process. Since the glass cover sheet product 692 and the removable mold member 23b are only attached to the second cavity 22b and the first cavity 21b without clamping, the second cavity 22b and the first cavity 21b can be smoothly released after cooling. Thereafter, the removable mold piece 23b may be removed in translation from the opening of the glass cover sheet product 692; specifically, the removable mold piece 23b is translated along the length of the second surface of the glass cover sheet product 692 (in the direction of the arrow in the figure) until the removable mold piece 23b is moved out of the second surface to remove the removable mold piece 23b from the glass cover sheet product 692, thereby obtaining the glass cover sheet product 692 with an inwardly bent edge. Where the side of the glass cover sheet product 692 on which the curved edge is located is defined as the long side of the glass cover sheet product 692, the direction in which the long side of the glass cover sheet product 692 extends is the length direction of the glass cover sheet product 692.
The first surface 6921 of the glass cover product 692 is positioned opposite the second surface 6922, and the inward bend of the edge 6923 of the glass cover product 692 means that the peripheral edge is bent at an angle θ greater than 90 degrees, such that the edge 6923 of the glass cover product 692 is closer to the interior of the product (closer to the second surface 6922), as shown in FIG. 6E.
Referring to fig. 5 and fig. 7A to 7C together, fig. 7A to 7C are partial process flow diagrams of a second embodiment of a hot bending process for manufacturing a glass cover plate according to the present invention. In this embodiment, steps S51 to S54 are the same as those in the first embodiment shown in fig. 6A to 6C, and reference is made to the above description, which is not repeated herein.
The difference from the first embodiment shown in fig. 6A to 6E is that in this embodiment, the removable mold element 23c of the hot bending mold is a combined structure, and includes a first sub-mold element 231c, a second sub-mold element 232c and an intermediate mold element 233c, and the intermediate mold element 233c is disposed between the first sub-mold element 231c and the second sub-mold element 232c and can move in a direction perpendicular to the plane of the first sub-mold element 231c and the second sub-mold element 232 c.
Then, with respect to step S55: and cooling and demolding, and taking out the removable mold member from the glass cover plate product to obtain the glass cover plate product with the inward bent edge, please refer to fig. 5 and fig. 7A-7C.
Specifically, after cooling and demolding, the intermediate mold member 233c is first moved in a direction perpendicular to the second surface of the glass cover sheet product 692 to remove the intermediate mold member 233c, as shown in fig. 7A, where the arrow indicates the moving direction of the intermediate mold member 233 c; thereafter, translating the first sub-mold member 231c and the second sub-mold member 232c toward the middle of the second surface of the glass cover sheet product 692 to disengage the first sub-mold member 231c and the second sub-mold member 232c from the curved edge of the glass cover sheet product 692 (a small amount of translation is performed until the first sub-mold member 231c and the second sub-mold member 232c are not caught by the curved edge), as shown in fig. 7B, where arrows indicate the moving direction of the translating the first sub-mold member 231c and the second sub-mold member 232 c; the first sub-mold member 231C and the second sub-mold member 232C can then be removed, as shown in fig. 7C, wherein the arrows indicate the moving direction of the first sub-mold member 231C and the second sub-mold member 232C when they are removed. Can take out through a small amount of translations can get put formula mould piece 23c, can reduce can get put formula mould piece 23c with the friction of the second surface of glass apron product 692 avoids causing the fish tail to glass apron product and can get put formula mould piece to avoid the product bad, and avoid the influence to the life of can getting put formula mould piece. The resulting glass cover sheet product can be seen with reference to fig. 6E.
According to the invention, the hot bending is carried out for 2 times, and the first groove and the second groove which are oppositely arranged are adopted during the hot bending for 2 times, and the removable mold piece which can be placed and taken out on the second surface of the glass cover plate to be processed is matched, so that the glass cover plate to be processed can be subjected to hot bending forming, the first mold groove and the second mold groove can be smoothly demolded, and a glass cover plate product with an inwards bent edge can be obtained; further through the mould spare of formula of can getting of adopting integrated configuration, reduced the friction between formula of can getting and putting mould spare and the glass apron product, avoided leading to the fact the fish tail to glass apron product and formula of can getting and putting mould spare to avoid the product bad, and avoid the influence to the life of formula of can getting and putting mould spare.
The foregoing is only a preferred embodiment of the present invention, 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 invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A hot-bending die, comprising:
the first die cavity is provided with a first groove, the first groove comprises a first end surface and two oppositely arranged first side surfaces, the first end surface is in contact with a first surface of the component to be machined, and the first side surfaces comprise first cambered surfaces close to the first end surface;
the second die cavity is provided with a second groove, the second groove comprises a second end face and two oppositely arranged second side faces, the second side faces comprise second cambered surfaces close to the second end face, and the second cambered surfaces are matched with the first cambered surfaces and are matched with the edges of the components to be processed;
the removable mold piece comprises a first contact surface, a second contact surface and two opposite third arc surfaces arranged between the first contact surface and the second contact surface, the first contact surface is in contact with the second surface of the component to be machined, the second contact surface is in contact with the second end surface of the second groove, and the third arc surfaces are matched with the edge of the component to be machined, wherein the second surface of the component to be machined is arranged opposite to the first surface;
at the beginning of a hot bending operation, the removable mold piece is placed on the second surface of the component to be processed; after the hot-bending forming, the removable mold piece is removed from the hot-bent assembly product, thereby obtaining the assembly product with the inward-bent edge.
2. The mold of claim 1, wherein the first recess is opposite the second recess to define a receiving cavity for receiving the component to be processed and the removable mold piece.
3. Hot bending mould according to claim 1,
the first side surface further comprises a first step-shaped side surface far away from the first end surface;
the first side surface further comprises a second step-shaped side surface far away from the second end surface, and the second step-shaped side surface is matched with the first step-shaped side surface.
4. A hot-bending die according to claim 1, wherein the first end surface of the first groove and the first contact surface of the removable die member are both flat surfaces or curved surfaces.
5. A hot-bending mould according to claim 1, wherein the removable mould member is of one-piece construction.
6. A hot-bending mould according to claim 1, wherein the removable mould element is of a modular construction comprising a first sub-mould element, a second sub-mould element and at least one intermediate mould element arranged between the first and second sub-mould elements and movable in a direction perpendicular to the plane of the first and second sub-mould elements.
7. The hot bending preparation process of the glass cover plate is characterized by comprising the following steps of:
(1) providing a hot bending mould according to any one of claims 1 to 4, and a glass cover plate to be processed with an edge arc of less than or equal to 90 degrees;
(2) placing the glass cover plate to be processed in a first groove of a first die cavity of the hot bending die, enabling a first surface of the glass cover plate to be processed to be in contact with a first end surface of the first groove, and enabling an outer surface of an arc-shaped edge of the glass cover plate to be processed to be attached to a first arc surface of the first groove;
(3) placing the removable mold piece of the hot bending mold on the second surface of the glass cover plate to be processed, and enabling the inner surface of the arc-shaped edge of the glass cover plate to be processed to be attached to the third arc surface of the removable mold piece;
(4) placing a second die cavity of the hot bending die on the first die cavity, heating and applying pressure to enable the second die cavity and the first die cavity to be matched, and further enabling the glass cover plate to be processed to be subjected to hot bending forming to form a glass cover plate product with an inward bent edge;
(5) and cooling and demolding, taking out the removable mold piece in the glass cover plate product, and obtaining the glass cover plate product with the edge bent inwards.
8. The process for hot-bending a glass cover plate according to claim 7, wherein step (1) is preceded by the further step of: and carrying out hot bending operation on the 2D glass to obtain the glass cover plate to be processed, wherein the edge radian of the glass cover plate is less than or equal to 90 degrees. The edge of the glass cover plate to be processed is a right-angled wall of 90 degrees
9. The process for hot-bending a glass cover sheet according to claim 7, wherein the removable mold member is an integrally formed structure, and the removing the removable mold member from the glass cover sheet product in step (5) further comprises:
translating the removable mold piece along a length of the second surface of the glass cover sheet product to remove the removable mold piece from the glass cover sheet product.
10. The process for hot-bending a glass cover plate according to claim 7, wherein the removable mold member is a modular structure comprising a first sub-mold member, a second sub-mold member, and at least one intermediate mold member disposed between the first sub-mold member and the second sub-mold member, and the removing the removable mold member from the glass cover plate product in step (5) further comprises:
moving the intermediate mold member in a direction perpendicular to the second surface of the glass cover sheet product to remove the intermediate mold member;
translating the first sub-mold piece and the second sub-mold piece to the middle of the second surface of the glass cover plate product to separate the first sub-mold piece and the second sub-mold piece from the arc-shaped edge of the glass cover plate product, and then taking out the first sub-mold piece and the second sub-mold piece.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911240584.9A CN110862222A (en) | 2019-12-06 | 2019-12-06 | Hot bending die and hot bending preparation process of glass cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201911240584.9A CN110862222A (en) | 2019-12-06 | 2019-12-06 | Hot bending die and hot bending preparation process of glass cover plate |
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| CN110862222A true CN110862222A (en) | 2020-03-06 |
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| CN201911240584.9A Pending CN110862222A (en) | 2019-12-06 | 2019-12-06 | Hot bending die and hot bending preparation process of glass cover plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113233744A (en) * | 2021-05-28 | 2021-08-10 | 京东方科技集团股份有限公司 | Hot bending method and hot bending equipment |
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| KR101694098B1 (en) * | 2016-05-23 | 2017-01-06 | 주식회사 신아텍 | Apparatus for Molding Cover Glass and Molding Apparatus Without Pressing Upper Mold Thereof |
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