Glass forming mold

Abstract

The utility model provides a glass forming die. The glass forming die comprises a male die, cavities are formed in the male die and comprise the first cavity and the second cavity which are independent of each other, and the first cavity and the second cavity can control vacuum pressure respectively. The first chamber is provided with a convex part, the second chamber is provided with a concave part, and the convex part of the first chamber is matched with the concave part of the second chamber; the protruding part of the first cavity is in the shape corresponding to the ADAS area of the automobile glass needing to be produced. In other words, the whole ADAS area is completely wrapped in the independent first cavity, so that the problem that in the existing forming process, the ADAS area of the automobile glass is divided into two parts by the male die cavity, and consequently surface difference is formed in the ADAS area of the automobile glass is solved, and the problem that an ADAS system fails is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to glass forming technical field, in particular to a glass forming mould. BACKGROUND

[0002] With the rapid development of automobile intelligent technology, the advanced driving assistance system (ADAS, Advanced Driving Assistance System) has become an important part of modern vehicles. The ADAS system obtains environmental information through cameras, radars and other sensors, realizes the perception and judgment of the vehicle's surrounding environment, and thus assists the driver to drive safely. Among them, the front windshield is an important perception window of the ADAS system, and the front windshield has an information transmission area (i.e. ADAS area) for the optical signal transmission of the ADAS system, so the optical performance of the ADAS area of the front windshield directly affects the perception effect of the ADAS system and driving safety.

[0003] At present, although the front windshield on the market has made certain progress in optical performance, there are still some deficiencies. For example, under the condition of direct sunlight or backlight, some front windshields are prone to glare, which affects the clear capture of the front road conditions by the in-vehicle camera; at the same time, some fine scratches or impurities on the glass surface also interfere with the signal transmission of the in-vehicle radar sensor, reducing the perception accuracy of the ADAS system.

[0004] In addition, the front windshield forming method is mainly single-press forming, from the original piece cutting and grinding-printing-molding-packing, among which the pressing process is the most critical, and the forming mold used for pressing is the most important. The design of the mold directly leads to the difference of the glass profile, causing ADAS optical defects. INVENTION CONTENTS

[0005] The technical problem to be solved by the utility model is to provide a glass forming mold, which optimizes the optical performance of the glass and ensures that the glass meets the perception requirements of the ADAS system to improve driving safety.

[0006] In order to solve the above technical problems, the utility model adopts the technical scheme of:

[0007] A glass forming mold, comprising a male die; a cavity is formed in the inside of the male die, the cavity comprises two mutually independent first and second cavities, the first and second cavities can control the vacuum pressure respectively;

[0008] The first cavity has a convex part, and the second cavity has a concave part, the convex part of the first cavity matches the concave part of the second cavity.

[0009] In an optional embodiment, the interior of the chamber is provided with a first partition plate, which divides the chamber into the first chamber and the second chamber.

[0010] In an optional embodiment, the interior of the second chamber is provided with a second partition plate, which divides the second chamber into a side chamber and a central chamber, and the central chamber has the recessed portion;

[0011] The central chamber corresponds to a central region of the male mold, the side chamber is located at a side of the central chamber, and the first chamber and the side chamber surround the central chamber.

[0012] In an optional embodiment, the second partition plate has three side edges, and the three side edges of the first partition plate and the second partition plate enclose the central chamber;

[0013] The side chamber includes at least three edge regions, and the at least three edge regions each surround the central chamber.

[0014] In an optional embodiment, the protruding portion of the first chamber is less than or equal to 300 mm away from the edge portion of the male mold.

[0015] In an optional embodiment, the area ratio of the first chamber, the side chamber, and the central chamber is (0.8-1.2):(1.8-2.2):(2.8-3.2).

[0016] In an optional embodiment, the first chamber, the side chamber, and the central chamber are respectively connected to different air pipes.

[0017] In an optional embodiment, the air pipe connected to the side chamber includes at least three groups of sub-air pipes.

[0018] The side chamber includes at least three edge regions.

[0019] The three groups of sub-air pipes are respectively connected to one of the edge regions.

[0020] In an optional embodiment, the male mold further includes a plurality of air holes, which are matched with the air pipes to enable the glass to be adsorbed on the male mold.

[0021] The air holes in the first chamber, the side chamber, and the central chamber have different distribution densities.

[0022] In an optional embodiment, the air pipe is provided with a control valve for controlling the air pressure of the air pipe.

[0023] The beneficial effects of this invention are as follows: By setting two independent first chambers and a second chamber on the punch, the vacuum pressure of the first chamber and the second chamber can be controlled separately; the first chamber has a protruding portion, and the second chamber has a recessed portion, with the protruding portion of the first chamber matching the recessed portion of the second chamber. The protruding portion of the first chamber has a shape corresponding to the ADAS area of ​​the automotive glass to be produced. In other words, the entire ADAS area is completely enclosed in the independent first chamber, solving the problem in existing molding processes where the punch cavity divides the ADAS area of ​​the automotive glass in two, leading to surface differences in the ADAS area, thereby improving the problem of ADAS system failure. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the punch in an existing glass forming mold;

[0025] Figure 2 This is a schematic diagram of the structure of the punch in a glass forming mold according to an embodiment of the present invention;

[0026] Label Explanation:

[0027] 100. Punch; 10. Side area; 101. First circumferential sidewall; 20. Middle area; 201. Second circumferential sidewall;

[0028] 1. Punch; 2. First chamber; 11. First partition; 12. Second partition; 3. Second chamber; 31. Side chamber; 32. Central chamber; 4. Trachea; 41. Sub-trachea. Detailed Implementation

[0029] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0030] In existing glass forming molds, the vacuum chamber of the punch is typically divided into two to three chambers, specifically, such as... Figure 1As shown, the vacuum chamber of the male die 100 is divided into a middle area 20 and a side area 10 surrounding the middle area 20, and the middle area 20 and the side area 10 are collectively subjected to vacuum suction. The side area 10 has a shape corresponding to the edge shape of the automotive glass to be produced, and the middle area 20 has a shape corresponding to the middle part shape of the automotive glass to be produced. The side area 10 includes a first peripheral wall 101, and the middle area 20 has a second peripheral wall 201, and the distance between the first peripheral wall 101 and the second peripheral wall 201 is about 100 mm. However, the distance between the ADAS area of the glass and the edge of the glass ranges from 60 mm to 220 mm, so the male die 100 in the existing glass forming die divides the ADAS area of the glass in half. That is, part of the ADAS area of the glass is located in the side area 10 of the male die 100, and the other part is located in the middle area 20 of the male die 100. Due to the non-uniformity of the vacuum process parameters and vacuum fluctuations of the side area 10 and the middle area 20, it may directly cause the profile difference of the ADAS area of the glass, resulting in the failure of the ADAS system. In addition, the cavity wall welded between the side area 10 and the middle area 20 of the male die 100 will also affect the profile of the ADAS area of the glass.

[0031] Therefore, based on the above-mentioned existing technical problems, the present application provides a glass forming die, in the process of glass press forming, the cavity of the male die does not divide the ADAS area of the glass in half, thereby improving the profile difference of the ADAS area of the glass to avoid the failure of the ADAS system.

[0032] Among them, the application takes the application scene of producing automotive front windshield glass as an example to introduce the structure of the glass forming die in the application and its use mode. The glass forming die provided by the application is not only suitable for the production of automotive front windshield glass, but also suitable for other glass and glass product application scenes, specifically:

[0033] Please refer to Figure 2 A glass forming die, comprising a male die 1, the male die 1 has the same outer convex surface as the shape of the automotive glass (not shown in the figure); the inside of the male die 1 is provided with a cavity, the cavity includes two independent first cavity 2 and second cavity 3, the first cavity 2 and the second cavity 3 can control the vacuum pressure respectively; the first cavity 2 has a protruding part, and the second cavity 3 has a recessed part, and the protruding part of the first cavity 2 matches the recessed part of the second cavity 3. Among them, the first cavity 2 has a shape corresponding to the upper edge and ADAS area of the automotive glass to be produced, and the protruding part of the first cavity 2 has a shape corresponding to the ADAS area of the automotive glass to be produced; the second cavity 3 has a shape corresponding to the automotive glass to be produced except the upper edge and the ADAS area.

[0034] The application sets the first chamber 2 and the second chamber 3 on the punch 1, and the protruding part of the first chamber 2 corresponds to the ADAS area of the automobile glass, that is, the entire ADAS area is fully wrapped in the independent first chamber 2, to solve the problem that the punch cavity divides the ADAS area of the automobile glass into two parts in the existing forming process, causing the ADAS area of the automobile glass to form a surface difference, thereby improving the problem of ADAS system failure.

[0035] In some embodiments, the inside of the chamber is provided with a first partition plate 11, which divides the chamber into a first chamber 2 and a second chamber 3. Specifically, the first chamber 2 is in the shape of a convex character, and the central chamber 32 is in the shape of a concave character, and the concave part of the central chamber 32 is embedded with the protruding part of the first chamber 2 and connected by the first partition plate 11. By setting the first chamber 2 in the shape of a convex character and the central chamber 32 in the shape of a concave character, the ADAS area of the automobile glass to be produced can be further corresponded, thereby improving the surface difference of the ADAS area of the automobile glass and avoiding ADAS system failure.

[0036] In some embodiments, the inside of the second chamber 3 is provided with a second partition plate 12, which divides the second chamber 3 into a side chamber 31 and a central chamber 32, and the central chamber 32 has a concave part; the central chamber 32 corresponds to the central area of the punch 1, and the side chamber 31 is located at the side of the central chamber 32, and the first chamber 2 and the side chamber 31 surround the central chamber 32. Among them, the side chamber 31 has a shape corresponding to the side and lower parts of the automobile glass to be produced, and the central chamber 32 has a shape corresponding to the middle part of the automobile glass to be produced. By dividing the second chamber 3 into a side chamber 31 and a central chamber 32, the application further optimizes the influence of different chambers on the different areas of the automobile glass, and improves the surface difference of the automobile glass.

[0037] In some embodiments, the second partition plate 12 has three sides, and the three sides of the first partition plate 11 and the second partition plate 12 enclose the central chamber 32; the side chamber 31 includes at least three edge regions, and the at least three edge regions all cover the central chamber 32. That is, the side chamber 31 covers the three sides of the central chamber 32, and the first partition plate 11, the second partition plate 12 and the inner wall of the punch 1 form the side chamber 21, which is more stable in structure.

[0038] In some embodiments, the distance between the protruding part of the first chamber 2 and the inner wall of the punch 1 is less than or equal to 300 mm. Further, the distance between the protruding part of the first chamber 2 and the inner wall of the punch 1 is greater than or equal to 150 mm. In this way, when producing automobile glass in a high-pressure manner, it is ensured that the automobile glass can be effectively formed, and the performance of the ADAS system is not affected.

[0039] In some embodiments, the distance between the side of the side chamber 31 and the inner wall of the punch 1 is less than or equal to 150 mm. In this way, the profile influence of different chambers on different areas of the automobile glass is optimized, and the profile difference of the automobile glass is improved.

[0040] In some embodiments, the area ratio of the first chamber 2, the side chamber 31 and the central chamber 32 is (0.8-1.2):(1.8-2.2):(2.8-3.2). By setting the area ratio of each chamber to (0.8-1.2):(1.8-2.2):(2.8-3.2), the area difference between each chamber is reduced.

[0041] In some embodiments, the first chamber 2, the side chamber 31 and the central chamber 32 are respectively communicated with different air pipes 4. By communicating the first chamber 2, the side chamber 31 and the central chamber 32 with different air pipes 4 respectively, the air volume of each chamber can be independently adjusted. Preferably, the center of the first chamber 2, the center of the side chamber 31 and the center of the central chamber 32 are respectively provided with air pipes 4. By setting the air pipes 4 at the center of each chamber, the gas can be uniformly distributed in the corresponding chamber.

[0042] In some embodiments, the air pipe 4 connected to the side chamber 31 includes at least three groups of sub-air pipes 41; the side chamber 31 includes at least three edge regions; the three groups of sub-air pipes 41 are respectively connected to one edge region. Preferably, each sub-air pipe 41 is connected to the center of each edge region. By setting three groups of sub-air pipes 41 respectively connected to the center of the three edge regions of the side chamber 31, the gas in each region of the side chamber 31 can be uniformly distributed.

[0043] In some embodiments, the punch 1 further includes a plurality of air holes, the air holes are matched with the air pipes 4 to make the glass adsorbed on the punch 1; the air hole distribution density of the first chamber 2, the side chamber 31 and the central chamber 32 is different. By setting different air hole distribution densities for different chambers, i.e. the air hole distribution density of each chamber can be adjusted according to the actual production demand to meet the production demand. As shown in Figure 2 , Figure 2 The "+" in the figure represents the density of the air holes.

[0044] In some embodiments, the air pipe 4 is provided with a control valve (not shown in the figure) for controlling the air pressure of the air pipe 4. In this application, the control valve is used to control the air pressure of each air pipe 4, i.e. to control the air pressure in the first chamber 1, the side chamber 31 and the central chamber 32. In this way, the pressure of each chamber can be independently controlled.

[0045] In some embodiments, the first chamber 2, the side chamber 31 and the central chamber 32 are arranged axially symmetrically based on the same symmetry axis. By forming the first chamber 2, the side chamber 31 and the central chamber 32 into an axially symmetric pattern as a whole, the mold as a whole is more stable.

[0046] Before glass production through the glass forming mold, the glass material is also optimized: selecting a raw sheet material with excellent light transmittance and ultraviolet resistance to make the front windshield glass (raw sheet combination), reducing the influence of direct sunlight on the camera sensing effect. Design optimization: the ADAS area of the glass should be printed with a hollow design; for double-printed products, the printing range of the ADAS area of the inner sheet should be larger than that of the outer sheet.

[0047] At the same time, impurity control is carried out during glass production: strictly control the impurity content in the production process of the front windshield glass, avoid the generation of surface scratches and internal bubbles and other defects, ensure the smoothness and cleanliness of the glass surface, so as to reduce the interference with the signal transmission of the sensor (such as laser radar). Optical performance detection: optical performance detection is carried out on the front windshield glass during production to ensure that each piece of glass meets the sensing requirements of the ADAS system.

[0048] By optimizing the glass material and surface treatment technology, the light transmittance and anti-glare performance of the front windshield glass can be significantly improved, thereby improving the sensing effect of the ADAS system under different light conditions. Reducing the scratches and impurities on the surface of the front windshield glass reduces the interference with the signal transmission of the sensor (such as laser radar), improves the sensing accuracy of the ADAS system, and further enhances the driving safety. Combined with the optimized mold structure and the above processing steps, the embodiment can effectively solve the optical problem of the front windshield glass in the ADAS system and improve the safety of automobile driving.

[0049] The above only describes the embodiments of the present application, and does not limit the patent range of the present application, any equivalent transformation or direct or indirect application in related technical fields based on the content of the present application specification and drawings are also included in the patent protection range of the present application.

Claims

1. A glass forming mold characterized by, The punch includes a cavity in the interior of the punch, the cavity includes two independent first and second chambers, the first and second chambers can control vacuum pressure respectively; The first chamber has a convex part, and the second chamber has a concave part, the convex part of the first chamber matches the concave part of the second chamber.

2. A glass forming mold according to claim 1, wherein The cavity is provided with a first partition plate in the interior of the cavity, the first partition plate separates the cavity into the first and second chambers.

3. A glass forming mold according to claim 1, wherein The second chamber is provided with a second partition plate in the interior of the second chamber, the second partition plate separates the second chamber into a side chamber and a central chamber, the central chamber has the concave part; The central chamber corresponds to a central area of the punch, the side chamber is located at a side of the central chamber, and the first and side chambers surround the central chamber.

4. A glass forming mold according to claim 3, wherein The second partition plate has three side edges, the first partition plate and the three side edges of the second partition plate enclose the central chamber; The side chamber includes at least three edge areas, and the at least three edge areas all cover the central chamber.

5. A glass forming mold according to claim 1, wherein The distance between the convex part of the first chamber and the edge of the punch is less than or equal to 300 mm.

6. A glass forming mold according to claim 3, wherein The area ratio of the first chamber, the side chamber and the central chamber is (0.8-1.2):(1.8-2.2):(2.8-3.2).

7. A glass forming mold according to claim 3, wherein The first chamber, the side chamber and the central chamber are respectively communicated with different air pipes.

8. A glass forming mold according to claim 7, wherein The air pipe connected with the side chamber includes at least three groups of sub air pipes. The side chamber includes at least three edge areas. The three groups of sub air pipes are respectively connected with one of the edge areas.

9. A glass forming mold according to claim 7, wherein The punch further includes a plurality of air holes, the air holes are matched with the air pipes to make the glass adsorbed on the punch; The air hole distribution densities of the first chamber, the side chamber and the central chamber are different.

10. A glass forming mold according to claim 7, wherein The air pipe is provided with a control valve for controlling the air pressure of the air pipe.

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