Hot bending die for special-shaped surfaces of glasses

Abstract

The utility model provides a hot bending die for special-shaped surfaces of glasses, and belongs to the technical field of dies. The problem that the production efficiency of existing mold machining is poor is solved. The hot bending die for the special-shaped surface of the glasses comprises an upper die and a lower die, the upper die is provided with a first forming wall, the lower die is provided with a second forming wall, the front end, the rear end, the left end and the right end of the first forming wall all tilt upwards, the front end, the rear end, the left end and the right end of the second forming wall all tilt upwards, and the outer edge of the first forming wall extends outwards to form a first arc-shaped reserved wall; the outer edge of the second forming wall extends outwards to form a second arc-shaped reserved wall, the outer side of the second reserved wall is connected with the inner side wall of the lower die, the first forming wall and the second forming wall are arranged in an up-down opposite mode, and a forming cavity is formed between the first forming wall and the second forming wall when the upper die and the lower die are closed. According to the hot bending mold for the special-shaped surface of the glasses, the edge of hot-pressed glass can be conveniently placed, the glass can gradually contract inwards after being hot-pressed, and the forming quality of the glasses lens is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a mold for hot bending of special-shaped surfaces of glasses. Background Art

[0002] With the continuous development of society, people are using AR glasses more and more. During the production process, the lenses of AR glasses need to be hot-bent. Existing production equipment for hot bending of glass, such as Chinese patent application [Authorization Announcement No.: CN209352775U], discloses a curved glass hot bending mold, including an upper mold, a lower mold and a support plate, the bottom of the upper mold has a protruding mold core, the lower mold has a accommodating cavity, the support plate is located in the accommodating cavity, and there is a gap between the circumferential edge of the support plate and the cavity wall of the accommodating cavity. The molding cavity formed between the upper surface of the support plate and the cavity wall of the accommodating cavity matches the shape of the mold core, and the mold core can be embedded in the molding cavity. There are several vacuum cavities for vacuuming between the bottom of the support plate and the bottom wall of the accommodating cavity, the bottom of the lower mold has several through holes for vacuuming, the through holes are connected to the vacuum cavity, the circumferential edge of the support plate and the cavity wall of the accommodating cavity have a gap, the bottom of both sides of the support plate has an inclined expansion surface, and an enlarged opening in the shape of an expansion mouth is formed between the expansion surface and the cavity wall of the accommodating cavity, and the enlarged opening is connected to the gap.

[0003] The above structure forms an enlarged opening between the cavity wall and the expansion surface of the accommodating cavity, and the enlarged opening is connected to the gap, so that during the heating process, the air in the molding cavity below the glass can be better extracted, and the air pressure below the glass is lower than the air pressure above the glass. The glass moves downward after softening and deformation, but it will partially shrink after cooling after softening, resulting in a design with a molding surface of the same size as the finished product. Since the above structure only requires the left and right ends of the heated glass to be tilted upward, in order to meet the production of anisotropic lenses, not only the left and right ends of the glass need to be tilted upward, but the front and back ends of the glass also need to be tilted upward. Using the existing processing mold, the glass needs to be hot-pressed twice, which affects the production efficiency of the glass. Utility Model Content

[0004] The purpose of the present invention is to solve the above problems in the existing technology and to propose a mold for hot bending of special-shaped surfaces of glasses. The technical problem to be solved by the present invention is: how to solve the problem of poor production efficiency of existing mold processing.

[0005] The purpose of this utility model can be achieved through the following technical solutions:

[0006] A mold for hot bending the special-shaped surface of glasses, comprising an upper mold and a lower mold, the upper mold having a molding wall 1, and the lower mold having a molding wall 2. The invention is characterized in that the front and rear ends and the left and right ends of the molding wall 1 are all upwardly curled, and the front and rear ends and the left and right ends of the molding wall 2 are all upwardly curled, the outer edge of the molding wall 1 extends outward to form an arc-shaped reserved wall 1, the outer edge of the molding wall 2 extends outward to form an arc-shaped reserved wall 2, the outer side of the reserved wall 2 is connected to the inner side wall of the lower mold, the molding wall 1 and the molding wall 2 are arranged to be opposite to each other in the upper and lower directions, and a molding cavity is formed between the molding wall 1 and the molding wall 2 when the upper and lower molds are closed.

[0007] Working principle: A molding wall 1 is provided on the upper mold and a molding wall 2 is provided on the lower mold. After the upper mold and the lower mold are closed, the molding wall 1 and the molding wall 2 form a molding cavity. During the hot pressing process, the glass is placed in the molding cavity. The glass will be partially softened after being hot pressed. After the glass softens, it is hot pressed by closing the upper mold and the lower mold. The front and back ends and the left and right ends of the glass are warped upward along the molding wall 1 and the molding wall 2 during hot pressing. Due to the large number of warping angles, wrinkles are likely to appear at the edge of the glass after hot pressing during the one-time processing process. The wrinkles can extend between the preset reserved wall 1 and the reserved wall 2 after hot pressing, so as to facilitate the placement of the edge of the glass after hot pressing. After hot pressing, the glass will gradually shrink inward, so that when the glass shrinks, it also shrinks along the reserved wall 1, the reserved wall 2, the molding wall 1 and the molding wall 2, guiding the shrinkage of the glass during processing, thereby improving the molding quality of the lens.

[0008] In the above-mentioned mold for hot bending of special-shaped surfaces of glasses, the forming wall 1 has two laterally symmetrically arranged fitting surfaces, one side of the fitting surface is connected to the other fitting surface, and the other side is connected to the reserved wall 1, and the fitting surfaces are both warped upward from one side to the other.

[0009] The setting of the fitting surface allows the glass to shrink along the fitting surface after hot pressing, so that the upper surface of the shrunken lens is laterally symmetrical, thereby improving the molding quality of the upper surface of the lens.

[0010] In the above-mentioned mold for hot bending of special-shaped surfaces of glasses, the second forming wall has two laterally symmetrically arranged supporting surfaces, one side of the supporting surface is connected to the other supporting surface, and the other side is connected to the reserved wall 2, and the supporting surfaces are both warped upward from one side to the other.

[0011] The setting of the support surface allows the glass to shrink along the support surface after hot pressing, so that the lower surface of the shrunken lens is laterally symmetrical, thereby improving the molding quality of the lower surface of the lens.

[0012] In the above-mentioned mold for hot bending of special-shaped surfaces of glasses, a positioning notch is provided at the corner of the outer side wall of the lower mold, and the upper mold has positioning ribs arranged in a one-to-one correspondence with the positioning notches, and the positioning ribs can be embedded in the corresponding positioning notches.

[0013] By opening a positioning notch at the corner of the outer side wall of the lower mold, when the upper mold and the lower mold are opened and closed, it is only necessary to slide the positioning rib vertically along the positioning notch, which facilitates the opening and closing of the upper mold and the lower mold. The setting of the positioning rib can achieve circumferential limitation after sliding vertically into place, thereby improving the stability of the hot bending mold.

[0014] In the above-mentioned mold for hot bending of special-shaped surfaces of glasses, the lower end of the outer side wall of the upper mold is embedded in the lower mold, and a clearance port communicating with the molding cavity is formed between the outer side wall of the upper mold and the inner side wall of the lower mold.

[0015] The arrangement of this structure can quickly extract the air in the forming cavity without affecting the hot pressing of the glass, thus avoiding the influence of the retained air on the forming of the glass.

[0016] Compared with the existing technology, the present mold for hot bending the special-shaped surface of glasses has the following advantages: the folds can extend between the preset reserved wall 1 and the reserved wall 2 after hot pressing, thereby facilitating the placement of the glass edge after hot pressing; after hot pressing, the glass will gradually shrink inward, so that when the glass shrinks, it also shrinks along the reserved wall 1, the reserved wall 2, the forming wall 1 and the forming wall 2, guiding the shrinkage of the glass during processing and improving the forming quality of the glasses. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the upper die in the utility model.

[0018] Figure 2 It is a structural schematic diagram of the middle and lower molds of the utility model.

[0019] Figure 3 It is a top view of the upper mold and the lower mold after the mold is closed in the utility model.

[0020] Figure 4 yes Figure 3 Cross-sectional view of AA in the figure.

[0021] Figure 5 yes Figure 3 Cross-sectional view of the BB.

[0022] Figure 6 yes Figure 4 A partial enlarged view of point A in the middle.

[0023] In the figure, 1, upper mold; 11, molding wall 1; 11a, fitting surface; 12, positioning rib; 13, reserved wall 1; 2, lower mold; 21, molding wall 2; 21a, supporting surface; 22, positioning notch; 23, reserved wall 2; 3, molding cavity; 4, clearance opening. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1 As shown, the mold for hot bending the special-shaped surface of glasses includes an upper mold 1 and a lower mold 2. The upper mold 1 has a molding wall 11, and the lower mold 2 has a molding wall 21.

[0026] Specifically, if Figure 1-6 As shown, the front and rear ends and the left and right ends of the forming wall 11 are all upwardly tilted, the front and rear ends and the left and right ends of the forming wall 2 21 are all upwardly tilted, the outer edge of the forming wall 11 extends outwardly to form an arc-shaped reserved wall 13, the outer edge of the forming wall 21 extends outwardly to form an arc-shaped reserved wall 23, the outer side of the reserved wall 23 is connected to the inner wall of the lower mold 2, the forming wall 11 and the forming wall 2 21 are arranged to face each other up and down, and a forming cavity 3 is formed between the forming wall 11 and the forming wall 2 21 when the upper mold 1 and the lower mold 2 are closed.

[0027] Working principle: A molding wall 11 is provided on the upper mold 1, and a molding wall 2 21 is provided on the lower mold 2. After the upper mold 1 and the lower mold 2 are closed, the molding wall 11 and the molding wall 2 21 form a molding cavity 3. During the hot pressing process, the glass is placed in the molding cavity 3. The glass will be partially softened after being hot pressed. After the glass softens, it is hot pressed by closing the upper mold 1 and the lower mold 2. The front and back ends and the left and right ends of the glass are warped upward along the molding wall 11 and the molding wall 2 21 during hot pressing. Due to the large number of warping angles, wrinkles are likely to appear at the edge of the glass after hot pressing during the one-time processing process. The wrinkles can extend between the preset reserved wall 13 and the reserved wall 2 23 after hot pressing, thereby facilitating the placement of the glass edge after hot pressing. After hot pressing, the glass will gradually shrink inward, so that when the glass shrinks, it also shrinks along the reserved wall 13, the reserved wall 2 23, the molding wall 11 and the molding wall 2 21, guiding the shrinkage of the glass during processing, thereby improving the molding quality of the lens.

[0028] like Figure 1 and Figure 2 As shown, a positioning notch 22 is provided at the corner of the outer side wall of the lower mold 2, and the upper mold 1 has positioning ribs 12 arranged in a one-to-one correspondence with the positioning notch 22. The positioning ribs 12 can be embedded in the corresponding positioning notch 22. In this embodiment, there are four positioning notches 22.

[0029] like Figure 1 and Figure 2 As shown, the forming wall 11 has two laterally symmetrically arranged fitting surfaces 11a, one side of the fitting surface 11a is connected to the other fitting surface 11a, and the other side is connected to the reserved wall 13, and the fitting surfaces 11a are both tilted upward from one side to the other side, and the forming wall 21 has two laterally symmetrically arranged supporting surfaces 21a, one side of the supporting surface 21a is connected to the other supporting surface 21a, and the other side is connected to the reserved wall 23, and the supporting surfaces 21a are both tilted upward from one side to the other side.

[0030] like Figure 3-6 As shown, the lower end of the outer side wall of the upper mold 1 is embedded in the lower mold 2 , and a clearance port 4 communicating with the molding cavity 3 is formed between the outer side wall of the upper mold 1 and the inner side wall of the lower mold 2 .

[0031] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A mold for hot bending of special-shaped surfaces of glasses, comprising an upper mold (1) and a lower mold (2), wherein the upper mold (1) has a first molding wall (11), and the lower mold (2) has a second molding wall (21), characterized in that: The front and rear ends and the left and right ends of the molding wall 1 (11) are all tilted upwards, and the front and rear ends and the left and right ends of the molding wall 2 (21) are all tilted upwards. The outer edge of the molding wall 1 (11) extends outwards to form an arc-shaped reserved wall 1 (13), and the outer edge of the molding wall 2 (21) extends outwards to form an arc-shaped reserved wall 2 (23). The outer side of the reserved wall 2 (23) is connected to the inner side wall of the lower mold (2). The molding wall 1 (11) and the molding wall 2 (21) are arranged to face each other vertically. When the upper mold (1) and the lower mold (2) are closed, a molding cavity (3) is formed between the molding wall 1 (11) and the molding wall 2 (21).

2. The mold for hot bending of special-shaped surfaces of glasses according to claim 1, characterized in that: The forming wall (11) has two laterally symmetrically arranged fitting surfaces (11a), one side of the fitting surface (11a) is connected to the other fitting surface (11a), and the other side is connected to the reserved wall (13), and the fitting surfaces (11a) are both tilted upward from one side to the other.

3. The mold for hot bending of special-shaped surfaces of glasses according to claim 1 or 2, characterized in that: The second forming wall (21) has two laterally symmetrically arranged supporting surfaces (21a), one side of the supporting surface (21a) is connected to the other supporting surface (21a), and the other side is connected to the second reserved wall (23), and the supporting surfaces (21a) are both tilted upward from one side to the other.

4. The mold for hot bending of special-shaped surfaces of glasses according to claim 1 or 2, characterized in that: A positioning notch (22) is provided at a corner of the outer side wall of the lower mold (2), and the upper mold (1) has positioning ribs (12) arranged in one-to-one correspondence with the positioning notches (22), and the positioning ribs (12) can be embedded in the corresponding positioning notches (22).

5. The mold for hot bending of special-shaped surfaces of glasses according to claim 1 or 2, characterized in that: The lower end of the outer side wall of the upper mold (1) is embedded in the lower mold (2), and a clearance opening (4) communicating with the molding cavity (3) is formed between the outer side wall of the upper mold (1) and the inner side wall of the lower mold (2).

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