Molding device and molding method of composite curvature glass

Abstract

The invention discloses a forming device and a forming method of composite curvature glass, the forming device comprises a forming assembly, the forming assembly comprises a forming lower die, the forming lower die is provided with a lower forming surface and a plurality of first air holes, and the plurality of first air holes are communicated to the lower forming surface; the multiple first air holes are formed in the lower forming face side by side at intervals and used for blowing out air to form a first air film layer on the lower forming face. The forming method of the composite curvature glass comprises the following steps: heating; the forming method comprises the following steps: 1, heating glass in a suspended state to a lower forming surface of a forming device; and 2, forming: forming the lower surface of the glass and the lower forming surface in a non-physical contact state. In the forming process, the glass and the lower forming face are separated through the first gas film layer to be formed, the forming process is in a non-physical contact state, and therefore the contact time of the glass and the forming lower die is shortened, and the surface optical quality of the formed glass is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of curved glass forming, and in particular to a forming device and a forming method for composite curvature glass. Background Art

[0002] At present, the molding of curved glass mostly adopts the normal temperature mold molding method. The heated glass is transported from the heating furnace to the roller of the molding section. After the glass is in place, the roller of the molding section descends, and the glass falls into the mold frame for molding. Then the roller rises, and the molded glass is separated from the mold frame and transported to the next station. This molding method uses normal temperature molding, the glass cools down quickly, the glass molding size is unstable, and because the lower mold and the roller station overlap, the lower mold is mostly frame-type, the glass and the mold cannot all fit tightly, the molding accuracy is low, and the frame-type mold cannot produce glass with complex curvature shapes.

[0003] Another traditional molding method is to put the prepared mold and glass into a heating furnace at the same time and heat the glass according to a predetermined heating curve. The glass is molded under its own gravity or other auxiliary devices, and then cooled according to a predetermined cooling curve to complete the glass molding process. Although this production method can process glass with a certain compound curvature, it has low production efficiency and high energy consumption. Due to the long-term contact between the glass and the mold, the optical quality of the glass surface is poor, and it cannot meet the production requirements of high-quality compound curvature glass. Summary of the invention

[0004] In order to overcome at least one of the defects of the above-mentioned prior art, the present invention provides a molding device and a molding method for composite curvature glass, wherein the glass is separated from the lower molding surface by a first air film layer during the molding process, and the molding process is a non-physical contact state, thereby reducing the contact time between the glass and the molding lower mold and improving the surface optical quality of the glass after molding.

[0005] The technical solution adopted by the present invention to solve the problem is:

[0006] A forming device for composite curvature glass comprises a forming assembly, wherein the forming assembly comprises a forming lower mold, wherein the forming lower mold is provided with a lower forming surface and a plurality of first air holes, wherein the plurality of first air holes penetrate the lower forming surface; the plurality of first air holes are arranged side by side at intervals on the lower forming surface, and are used for blowing out gas to form a first air film layer on the lower forming surface.

[0007] A method for forming composite curvature glass, comprising:

[0008] A heating step, heating the glass in a heating chamber; the heated glass is output from the heating chamber via a conveying mechanism;

[0009] In the first forming step, a forming device receives the glass outputted by the conveying mechanism, and a plurality of first air holes are arranged on the lower forming surface of the forming device. The plurality of first air holes blow out gas through a first ventilation structure to support the glass outputted by the conveying mechanism on the lower forming surface, so that the heated glass moves to the lower forming surface of the forming device in a suspended state.

[0010] Molding step two, after molding step one, control the wind pressure and air volume of the first ventilation structure so that the wind pressure and air volume blown out by the multiple first air holes gradually decrease, so that the glass gradually falls onto the lower molding surface, and a first air film layer matching the structure of the lower molding surface is formed between the glass and the lower molding surface, so that the lower surface of the glass and the lower molding surface are molded in a non-physical contact state.

[0011] In summary, the present invention has the following technical effects:

[0012] Under the support of its own gravity and the gas blown out of the first air hole, the shape of the glass gradually converges with the lower molding surface. When the glass falls to the final position, there is only a thin first air film layer between the glass and the molding surface of the lower mold, and the glass is thin and the molding curvature is simple. At this time, the curvature of the glass matches the lower molding surface of the molding lower mold. The molding of relatively complex glass can also be achieved by adjusting the steady-state time of the glass in the molding lower mold. Therefore, when molding glass with relatively complex curvature, the residence time of the glass and the lower molding surface is lengthened, but the two are in a non-physical contact state. Therefore, even if the molding time is long, it will not affect the optical quality of the glass surface due to the long-term contact between the mold and the glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the molding device of the present invention;

[0014] Figure 2 It is a structural schematic diagram of a molding process of the present invention;

[0015] Figure 3 It is a structural schematic diagram of another molding process of the present invention.

[0016] Among them, the meanings of the accompanying drawings are as follows: A, heating chamber; B, molding chamber; 1, second heating element; 2, glass; 3, conveying mechanism; 4, partition; 5, molding upper mold; 51, upper molding surface; 52, second air hole; 53, second air film layer; 6, molding lower mold; 61, lower molding surface; 62, first air hole; 63, first air film layer; 7, second ventilation structure; 8, insulation layer; 9, positioning structure; 10, lifting mechanism; 11, first heating element; 12, air guide duct; 13, fan. DETAILED DESCRIPTION

[0017] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0018] In the description of the present invention, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0020] Embodiment 1,

[0021] See also Figure 1 , Figure 2 as well as Figure 3 The present invention discloses a molding device for composite curvature glass, including a molding component, specifically the molding component includes a molding lower mold 6, and the molding lower mold 6 is provided with a lower molding surface 61 and a plurality of first air holes 62, and the plurality of first air holes 62 penetrate to the lower molding surface, and the plurality of first air holes 62 are arranged side by side on the lower molding surface 61 at intervals, and the plurality of first air holes 62 can blow out gas, and the gas can form a first air film layer 63 on the lower molding surface 61.

[0022] On the basis of this structure, the composite curvature glass forming device of the present invention is used. When the curvature of the glass 2 is relatively simple and the thickness of the glass 2 is relatively thin, the lower mold 6 is used for forming alone. Figure 2 :

[0023] The heated glass 2 can be conveyed to the position of the lower molding mold 6 through the conveying mechanism 3. Since the heated glass 2 is in a softened state, the conveying mechanism 3 can be received by the lower molding surface 61 when conveying the heated glass 2 to the conveying molding lower mold 6. At this time, multiple first air holes 62 can discharge gas. The multiple first air holes 62 are arranged side by side on the lower molding surface 61 at intervals. The blown gas can lift the glass 2 conveyed by the conveying mechanism 3 upward. Under the continuous conveying action of the conveying mechanism 3 and the inertia of the glass 2 itself, combined with the gas blown out of the multiple first air holes 62, the glass 2 moves in a suspended state to the lower molding surface 61 on the molding lower mold 6. At this time, the softened glass 2 can adapt to the shape of the lower molding surface 61 under the action of its own gravity.

[0024] That is, the entire glass 2 can enter the lower molding surface 61 of the molding lower mold 6 in a suspended state under the action of the multiple first air holes 62. After that, the glass 2 can be kept on the lower molding surface for a certain period of time. In this stage, by gradually reducing the wind pressure and air volume of the multiple first air holes 62 on the lower molding surface, the glass 2 suspended on the lower molding surface gradually falls down, and finally forms a first air film layer 63 between the glass 2 and the lower molding surface. In this way, the glass 2 has no contact with the molding lower mold 6 during the molding process, and physical non-contact molding is achieved.

[0025] It should be noted that, in the process of the glass 2 falling, the shape of the glass 2 gradually converges with the lower molding surface under the support of its own gravity and the gas blown out of the first air hole. When the glass 2 falls to the final position, there is only a thin first air film layer 63 between the glass 2 and the molding surface of the lower mold, and the glass 2 is relatively thin and the molding curvature is relatively simple. At this time, the curvature of the glass 2 matches the lower molding surface of the molding lower mold 6. The molding of relatively complex glass 2 can also be achieved by adjusting the steady-state time of the glass 2 in the molding lower mold 6. Therefore, when molding glass 2 with relatively complex curvature, the residence time of the glass 2 and the lower molding surface is lengthened, but the two are in a non-physical contact state. Therefore, even if the molding time is long, it will not affect the optical quality of the glass 2 surface due to the long-term contact between the mold and the glass 2.

[0026] Furthermore, the molding assembly in this embodiment also includes a first ventilation structure. The above-mentioned molding lower mold 6 is provided with a first cavity. The above-mentioned first cavity is located below the lower molding surface 61. The first cavity is connected to the first ventilation structure, and multiple first air holes 62 are all connected to the first cavity.

[0027] In this way, when the gas is guided to the multiple first air holes 62, the gas is introduced into the first chamber through the first ventilation structure, and then the multiple first air holes are connected to the first chamber, so that the multiple first air holes 62 can evenly guide the gas in the first chamber. Since the heated glass 2 is first lifted by the gas guided out by the multiple first air holes during the forming process, and then moves in a suspended state, the wind pressure and air volume of the multiple first air holes are controlled to be reduced to form the first air film layer 63 to achieve forming, it is necessary to keep the wind pressure and air volume guided out by the multiple first air holes relatively uniform. Therefore, in the present application, after the gas is first introduced into the first chamber through the first ventilation structure, the first chamber can gather the gas to ensure that a stable air pressure is formed evenly, and the wind pressure and air volume formed after the guiding are relatively stable.

[0028] Furthermore, the first ventilation structure includes a fan 13 and a first heating element 11, and the air outlet of the fan 13 is connected to the first chamber. The first heating element 11 is used to heat the airflow of the fan 13 so that the airflow in the first chamber is hot air. Since the glass 2 needs to be kept in a softened state during the molding process in order to be better molded, in this embodiment, the first heating element 11 is used to heat the airflow led to the first chamber, so that the gas led out of the first pore is hot air, that is, the first air film layer formed by hot air is between the glass 2 and the lower molding surface, and the glass 2 can be molded in a heat-insulating state under the support of the first air film layer.

[0029] Compared with directly heating the lower molding die 6 or the entire molding area, the heat of the first air film layer formed by the hot air directly introduced through the multiple first air holes can directly heat and insulate the glass 2, so the heat utilization rate is higher and the molding accuracy of the glass 2 is higher.

[0030] More specifically, the air outlet of the fan 13 in this embodiment is connected to the first chamber through the air duct 12, and the above-mentioned first heating element 11 is arranged outside the air duct 12, and the first heating element 11 can heat the airflow in the air duct 12, so that the fan 13 introduces the airflow into the air duct 12, and the airflow in the air duct 12 can be heated by the first heating element 11.

[0031] Of course, the first heating element 11 may also be disposed inside the air duct 12 to provide heat therein, or may be disposed in the first chamber to provide heating, and the specific location may be selected according to actual needs.

[0032] Embodiment 2,

[0033] See also Figure 3 , which is different from the first embodiment, the glass 2 in the present embodiment can be formed by the cooperation of the upper forming mold 5 and the lower forming mold 6, and can form the glass 2 with more complex curvature, and adopts the upper and lower mold extrusion forming method, that is, the compression molding method:

[0034] Specifically, the molding assembly further includes a molding upper mold 5, which is disposed above the molding lower mold 6, and the molding upper mold 5 is provided with an upper molding surface 51, and the upper molding surface 51 and the lower molding surface 61 are structurally matched and spaced to form a molding interval that matches the structure of the glass 2. Similarly, a plurality of second air holes 52 are provided on the upper molding surface, and the plurality of second air holes 52 are spaced and arranged side by side on the upper molding surface 51, and are used to blow out gas to form a second air film layer 53 on the upper molding surface 51.

[0035] On the basis of this structure, when the glass 2 is being molded, the heated glass 2 can be transported to the position of the molding lower mold 6 via the conveying mechanism 3. Since the heated glass 2 is in a softened state, the conveying mechanism 3 can receive the heated glass 2 to the conveying molding lower mold 6 when conveying the heated glass 2 to the conveying molding lower mold 6. At this time, the multiple first air holes 52 can discharge the gas. The multiple first air holes 62 are arranged side by side on the lower molding surface 61 at intervals. The blown gas can lift the glass 2 transported by the conveying mechanism 3 upward. Under the continuous conveying action of the conveying mechanism 3 and the inertia of the glass 2 itself, combined with the gas blown out of the multiple first air holes 62, the glass 2 moves in a suspended state to the lower molding surface 61 on the molding lower mold 6. At this time, the softened glass 2 can adapt to the shape of the lower molding surface 61 under the action of its own gravity.

[0036] That is, the glass 2 as a whole can enter the lower molding surface 61 of the molding lower mold 6 in a suspended state under the action of the multiple first air holes 62. After that, the glass 2 can be kept on the lower molding surface for a certain period of time. In this stage, by gradually reducing the wind pressure and air volume of the multiple first air holes 62 on the lower molding surface 61, the glass 2 suspended on the lower molding surface 61 gradually falls down, and finally forms a first air film layer 63 between the glass 2 and the lower molding surface 61. In this way, the glass 2 has no contact with the molding lower mold 6 during the molding process, and physical non-contact molding is achieved.

[0037] After that, the molding upper mold 5 and the molding lower mold 6 start the mold closing action. Similarly, gas can be blown out from the molding upper mold 5 through the multiple second air holes 52 on the molding upper mold 5 to directly act on the upper surface of the glass 2. When the molding lower mold 6 and the molding upper mold 5 are gradually closed, the upper and lower surfaces of the glass 2 are isolated by the second air film layer 53 and the first air film layer 63 respectively. Since the shapes of the upper molding surface 51 and the lower molding surface 61 match each other, the glass 2 gradually converges with the mold molding surface during the mold closing process, and extremely thin air film layers are formed on the upper and lower surfaces of the glass 2. There is no physical contact between the glass 2 and the mold. Under the extrusion action of the mold, the glass 2 can reach the molding curvature at each position, and then the lower mold falls back to complete the molding process. Similarly, according to the complexity of the curvature of the molded glass 2, the mold closing time and the extrusion time can be appropriately extended to ensure the consistency and stability of the curvature of the molded glass 2 each time.

[0038] Similarly, the above-mentioned molding assembly also includes a second ventilation structure 7. The molding upper mold 5 is provided with a second cavity, and the second cavity is located above the upper molding surface 51. The second cavity is connected to the second ventilation structure 7, and multiple second air holes are connected to the second cavity.

[0039] When the gas is guided to the multiple second air holes 52, the gas is introduced into the second chamber through the second ventilation structure 7, and then the multiple second air holes 52 are connected to the second chamber, so that the multiple second air holes 5 can evenly guide the gas in the second chamber. The upper molding surface 51 of the molding upper mold 5 forms a second air film layer with the wind pressure and air volume of the multiple second air holes 52, and cooperates with the first air film layer 63 of the lower molding surface 61 to form the glass 2 above and below, so it is necessary to keep the second air film layer 53 and the first air film layer 63 relatively uniform, so the wind pressure and air volume guided out of the multiple second air holes are relatively uniform. Therefore, in the present application, after the gas is first introduced into the second chamber through the second ventilation structure 7, the second chamber can gather the gas to ensure that the uniform and stable air pressure is formed, and the wind pressure and air volume formed after the guide are relatively stable.

[0040] Furthermore, the second ventilation structure 7 includes a fan 13 and a second heating element 1, the air outlet of the fan 13 is connected to the second chamber, and the second heating element 1 is used to heat the airflow of the fan 13 so that the airflow in the second chamber is hot air. Since the glass 2 needs to be kept in a softened state during the molding process in order to be better molded, in this embodiment, the second heating element 1 is used to heat the airflow led to the second chamber, so that the gas led out of the second air hole is hot air, that is, the second air film layer formed by hot air is between the glass 2 and the lower molding surface, and the glass 2 can be molded in a heat-insulating state under the support of the second air film layer.

[0041] Embodiment 3,

[0042] Different from Example 1 and Example 2, the molding device of the composite curvature glass in this embodiment further includes a molding chamber B, the inner wall of which is provided with a heat-insulating layer 8; and the molding assembly is installed in the molding chamber B.

[0043] When a molding chamber B is provided, the molding chamber B is provided with a heat-insulating layer 8, so that after the heated glass 2 is transported to the molding chamber B, the heat-insulating layer 8 can reduce the internal heat loss, so that the glass 2 can be molded in a heat-insulating state.

[0044] On the basis of setting the first ventilation structure and the second ventilation structure 7, the above-mentioned air guide duct 12, fan 13, first heating element 11 and second heating element 1 are all installed in the molding chamber B. The first heating element 11 and the second heating element 1 are arranged outside the air guide duct 12, that is, in the molding chamber B, so that the first heating element 11 and the second heating element 1 can heat the entire space of the molding chamber B. On the one hand, the first heating element 11 and the second heating element 1 can directly heat the upper and lower parts of the molding chamber B, so that the temperature in the molding chamber B can be maintained at the temperature of the glass 2 in the molding state, which is easier to mold. On the other hand, when the above-mentioned fan is blowing, the gas blown in is introduced from the molding chamber B, so the airflow introduced into the air guide duct is hot air, which is directly guided to the upper molding surface and the lower molding surface, so that the glass is directly kept at the softening temperature during the glass molding process.

[0045] Of course, the heating temperatures of the first heating element 11 and the second heating element 1 can be adjusted according to the actual temperature required by the glass 2 molding structure, and the wind pressure and wind volume of the fan 13 can be adaptively adjusted according to the actual situation. When there is no glass 2 molding in the molding chamber B, the fan 13 can be operated at a lower frequency to adjust the consistency of the temperature field of the entire molding area by convection.

[0046] In addition, the first heating element and the second heating element can be implemented by electric heating structures such as heating wires, heating resistors, or heating tubes in the prior art.

[0047] Furthermore, the forming device of the composite curvature glass also includes a heating chamber A, in which a third heating element and a conveying mechanism 3 are provided, and the conveying end of the conveying mechanism 3 extends into the forming chamber B and is connected with the lower forming surface. When the glass 2 is formed, the glass 2 can be conveyed through the conveying mechanism 3, and the third heating element can heat the glass 2 on the conveying mechanism 3. When the glass 2 is heated to a softened forming state, the conveying mechanism 3 conveys the glass 2 to the forming chamber B, and is received by the lower forming surface of the forming lower mold 6. In addition, during the receiving process, air is blown through a plurality of first air holes so that the glass 2 can enter the lower forming surface in a suspended state, that is, during the forming process, the conveying of the glass 2 also depends on the conveying inertia of the glass 2 and its own gravity inertia, which is achieved in cooperation with the first air film layer, thereby reducing the contact of the glass 2 with the conveying mechanism 3 and the lower forming mold, and the surface accuracy of the glass 2 after forming is higher.

[0048] Of course, a partition 4 can be set between the heating chamber A and the molding chamber B. The specific partition 4 can be a partition door panel. The closing or conduction between the heating chamber A and the molding chamber B can be achieved by lifting or rotating the partition door panel. The heating chamber A and the molding chamber B are each independent zones, and are both provided with an entrance and an exit. The heating chamber A and the molding chamber B are set to different temperatures according to process requirements. The glass 2 enters from the entrance of the heating chamber A, is heated to a preset temperature in the heating zone, the partition is opened, and the glass 2 is transported to the molding chamber B by the conveying device, and then the partition is closed to ensure that the temperature fields of the two zones do not affect each other.

[0049] More specifically, a positioning structure 9 can also be provided at the end of the lower molding mold 6. During the process of the glass 2 being transported to the lower molding surface of the lower molding mold 6 by blowing and suspending the glass 2 through the conveying mechanism 3 in cooperation with the multiple first air holes, the glass 2 will move from one end of the lower molding surface to the other end until the glass 2 is completely separated from the conveying mechanism 3 and contacts the positioning structure 9. The positioning structure 9 can position the molding end of the glass 2 to prompt that the glass 2 is transported into place. At this time, the wind pressure and air volume can be reduced by controlling the first ventilation structure so that the blowing volume and air pressure of the multiple first air holes are in the first air film layer for the molding action.

[0050] Embodiment 4,

[0051] Based on the structures of the above-mentioned Embodiments 2 and 3, the molding assembly further includes a lifting mechanism 10, and the lifting mechanism 10 is used to drive the molding lower mold 6 to move up and down.

[0052] After the glass 2 falls downward into the molding lower mold 6, due to the complex curvature, the shape of the glass 2 cannot be completely matched with the molding lower mold 6. At this time, the molding lower mold 6 is lifted upward by the lifting mechanism 10, and the glass 2 and the molding lower mold 6 are still isolated by an air film. The second ventilation structure 7 connected to the molding upper mold 5 blows hot air from the molding upper mold 5, which directly acts on the upper surface of the glass 2, and the first ventilation structure connected to the molding lower mold 6 blows hot air from the molding lower mold 6, which directly acts on the upper surface of the glass 2.

[0053] When the molding lower mold 6 and the molding upper mold 5 are gradually closed, the upper and lower surfaces of the glass 2 are separated by an air film layer. Since the shapes of the upper and lower molds match each other, the glass 2 gradually converges with the molding surface of the mold during the closing process. The molding lower mold 6 can be raised to a specified height under the action of the lifting mechanism 10. At this time, extremely thin air films are formed on the upper and lower surfaces of the glass 2. There is no physical contact between the glass 2 and the mold. Under the extrusion of the mold, the glass 2 can reach the molding curvature at all positions. Then, the molding lower mold 6 falls back under the action of the lifting mechanism 10 to complete the molding process. Similarly, according to the complexity of the curvature of the molded glass 2, the extrusion time can be appropriately extended to ensure the consistency and stability of the curvature of the molded glass 2 each time.

[0054] It should also be noted that for the molding of complex composite curvature glass 2, the molding lower mold 6 can be controlled by a servo motor (such as a screw drive structure), which can achieve precise control of the lifting height and lifting speed of the molding lower mold 6. At the beginning of the rising stage of the molding lower mold 6, a higher rising rate is adopted to reduce the time of the molding process. When the upper surface of the glass 2 is close to the lower surface of the molding upper mold 5, a low-speed mold closing method can be adopted to gradually complete the molding of the complex curvature part, thereby ensuring the molding stability and dimensional consistency of the complex curvature glass 2. After the glass 2 reaches the target curvature, the molding lower mold 6 is first slowly disengaged from the molding upper mold 5, and after descending to a certain height, it is lowered back at a higher rate, which can ensure the stability of the external dimensions of the glass 2 and shorten the molding process.

[0055] Of course, the lifting mechanism 10 can also be implemented by other driving structures such as a lifting cylinder or a lifting oil cylinder.

[0056] In addition, in addition to using the lifting mechanism 10 to drive the molding lower mold 6 to lift and lower to achieve mold closing and mold opening, it is also possible to set a lifting mechanism 10 to drive the molding upper mold 5 to lift and lower, or to use the molding upper and lower mold linkage to achieve mold closing and mold opening. The specific selection can be made according to actual needs.

[0057] Embodiment 5,

[0058] This embodiment provides a method for forming a composite curvature glass, comprising:

[0059] A heating step, heating the glass in a heating chamber; the heated glass is output from the heating chamber via a conveying mechanism;

[0060] In the first forming step, a forming device receives the glass outputted by the conveying mechanism, and a plurality of first air holes are arranged on the lower forming surface of the forming device. The plurality of first air holes blow out gas through a first ventilation structure to support the glass outputted by the conveying mechanism on the lower forming surface, so that the heated glass moves to the lower forming surface of the forming device in a suspended state.

[0061] Molding step two, after molding step one, control the wind pressure and air volume of the first ventilation structure so that the wind pressure and air volume blown out by the multiple first air holes gradually decrease, so that the glass gradually falls onto the lower molding surface, and a first air film layer matching the structure of the lower molding surface is formed between the glass and the lower molding surface, so that the lower surface of the glass and the lower molding surface are molded in a non-physical contact state.

[0062] The heated glass can be transported to the position of the lower molding mold through the conveying mechanism. Since the heated glass is in a softened state, the conveying mechanism can receive the heated glass on the lower molding surface when conveying it to the conveying molding lower mold. At this time, multiple first air holes can discharge gas. The multiple first air holes are arranged side by side on the lower molding surface at intervals. The blown gas can lift the glass transported by the conveying mechanism upward. Under the continuous conveying action of the conveying mechanism and the inertia of the glass itself, combined with the gas blown out of the multiple first air holes, the glass moves in a suspended state to the lower molding surface on the molding lower mold. At this time, the softened glass can adapt to the shape of the lower molding surface under the action of its own gravity.

[0063] That is, the entire glass can enter the lower molding surface of the molding lower mold in a suspended state under the action of the multiple first air holes. After that, the glass can be kept on the lower molding surface for a certain period of time. In this stage, by gradually reducing the wind pressure and air volume of the multiple first air holes on the lower molding surface, the glass suspended on the lower molding surface gradually falls down, and finally forms a first air film layer between the glass and the lower molding surface. In this way, the glass has no contact with the molding lower mold during the molding process, realizing physical non-contact molding.

[0064] It should be noted that in the process of the glass falling, under the support of its own gravity and the gas blown out of the first air hole, its shape gradually converges with the lower molding surface. When the glass falls to the final position, there is only a thin first air film layer between the glass and the molding surface of the lower mold, and the glass is thin and the molding curvature is simple. At this time, the curvature of the glass matches the lower molding surface of the molding lower mold. The molding of relatively complex glass can also be achieved by adjusting the steady-state time of the glass in the molding lower mold. Therefore, when molding glass with relatively complex curvature, the residence time of the glass and the lower molding surface is lengthened, but the two are in a non-physical contact state. Therefore, even if the molding time is long, it will not affect the optical quality of the glass surface due to the long-term contact between the mold and the glass.

[0065] Embodiment 6,

[0066] This embodiment provides another molding method of composite curvature glass, further comprising a molding step three, wherein after the molding step two, the lower molding surface of the molding device moves upward under the action of the lifting mechanism, and cooperates with the upper molding surface of the molding device to form a molding interval matching the curvature of the finished glass product;

[0067] The second air holes on the upper molding surface of the molding device blow out gas through the second ventilation structure to form a second air film layer matching the structure of the upper molding surface on the upper molding surface, so that the upper surface of the glass is molded in a non-physical contact state with the upper molding surface.

[0068] The upper and lower molds cooperate to form glass with more complex curvatures. The upper and lower molds are used for extrusion molding, which is called compression molding:

[0069] Specifically, the molding assembly further includes a molding upper mold, which is disposed above the molding lower mold, and the molding upper mold is provided with an upper molding surface, and the upper molding surface and the lower molding surface structure match and are spaced to form a molding interval that matches the glass structure. Similarly, a plurality of second air holes are provided on the upper molding surface, and the plurality of second air holes are spaced and arranged side by side on the upper molding surface, and are used to blow out gas to form a second air film layer on the upper molding surface.

[0070] On the basis of this structure, when glass is formed, the heated glass can be transported to the position of the lower forming mold through the conveying mechanism. Since the heated glass is in a softened state, the conveying mechanism can receive the heated glass on the lower forming mold when conveying the heated glass to the lower forming mold. At this time, a plurality of first air holes can discharge gas. The plurality of first air holes are arranged side by side on the lower forming surface at intervals. The blown gas can lift up the glass transported by the conveying mechanism. Under the continuous conveying action of the conveying mechanism and the inertia of the glass itself, the glass moves in a suspended state to the lower forming surface on the lower forming mold in combination with the gas blown out of the plurality of first air holes. At this time, the softened glass can adapt to the shape of the lower forming surface under the action of its own gravity.

[0071] That is, the entire glass can enter the lower molding surface of the molding lower mold in a suspended state under the action of the multiple first air holes. After that, the glass can be kept on the lower molding surface for a certain period of time. In this stage, by gradually reducing the wind pressure and air volume of the multiple first air holes on the lower molding surface, the glass suspended on the lower molding surface gradually falls down, and finally forms a first air film layer between the glass and the lower molding surface. In this way, the glass has no contact with the molding lower mold during the molding process, realizing physical non-contact molding.

[0072] After that, the molding upper mold and the molding lower mold start to close the mold. Similarly, gas can be blown out from the molding upper mold through the multiple second air holes on the molding upper mold to directly act on the upper surface of the glass. When the molding lower mold and the molding upper mold are gradually closed, the upper and lower surfaces of the glass are isolated by the second air film layer and the first air film layer respectively. Since the shapes of the upper molding surface and the lower molding surface match each other, the glass gradually converges with the mold molding surface during the closing process, and extremely thin air film layers are formed on the upper and lower surfaces of the glass. There is no physical contact between the glass and the mold. Under the extrusion of the mold, the glass can reach the molding curvature at each position, and then the lower mold falls back to complete the molding process. Similarly, according to the complexity of the curvature of the formed glass, the closing time and the extrusion time can be appropriately extended to ensure the consistency and stability of the curvature of the formed glass each time.

[0073] It should be noted that, in any of the above embodiments, the molding surface of the mold is a curved surface, and the curvature matches the molding curvature of the glass, and can be specifically set according to the molding curvature of the glass.

[0074] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above-mentioned technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also regarded as the protection scope of the present invention.

Claims

1. A forming device for composite curvature glass, characterized in that , including a molding component, the molding component includes a molding lower mold, the molding lower mold is provided with a lower molding surface and a plurality of first air holes, the plurality of first air holes penetrate the lower molding surface; the plurality of first air holes are arranged side by side at intervals on the lower molding surface, and are used to blow out gas to form a first air film layer on the lower molding surface.

2. The forming device for composite curvature glass according to claim 1, characterized in that: The molding assembly also includes a first ventilation structure. The molding lower mold is provided with a first cavity. The first cavity is located below the lower molding surface. The first cavity is communicated with the first ventilation structure. The plurality of first air holes are all communicated with the first cavity.

3. The forming device for composite curvature glass according to claim 2, characterized in that: The first ventilation structure includes a fan and a first heating element. The air outlet of the fan is connected to the first chamber. The first heating element is used to heat the airflow of the fan so that the airflow in the first chamber is hot air.

4. The forming device for composite curvature glass according to claim 3, characterized in that: The air outlet of the fan is communicated with the first chamber through an air guide duct, and the first heating element is arranged outside the air guide duct and is used to heat the airflow in the air guide duct.

5. The forming device for composite curvature glass according to claim 2, characterized in that: The molding assembly also includes a molding upper mold, which is arranged above the molding lower mold; the molding upper mold is provided with an upper molding surface, and the upper molding surface matches the structure of the lower molding surface and is spaced to form a molding interval matching the glass structure; a plurality of second air holes are provided on the upper molding surface, and the plurality of second air holes are spaced and arranged side by side on the upper molding surface, and are used to blow out gas to form a second air film layer on the upper molding surface.

6. The forming device for composite curvature glass according to claim 5, characterized in that: The molding assembly also includes a second ventilation structure. The molding upper mold is provided with a second cavity. The second cavity is located above the upper molding surface. The second cavity is communicated with the second ventilation structure. A plurality of the second air holes are all communicated with the second cavity.

7. The forming device for composite curvature glass according to claim 6, characterized in that: The second ventilation structure includes a fan and a second heating element. The air outlet of the fan is connected to the second chamber. The second heating element is used to heat the airflow of the fan so that the airflow in the second chamber is hot air.

8. The forming device for composite curvature glass according to any one of claims 2 to 7, characterized in that: The forming device of the composite curvature glass also includes a forming chamber, the inner wall of which is provided with a heat-insulating layer; and the forming assembly is installed in the forming chamber.

9. The forming device for composite curvature glass according to claim 8, characterized in that: The forming device of the composite curvature glass also includes a heating chamber, in which a third heating element and a conveying mechanism are arranged, and a conveying end of the conveying mechanism conveys the glass to the forming chamber and connects with the lower forming surface.

10. The forming device for composite curvature glass according to any one of claims 1 to 7, characterized in that: The molding assembly also includes a lifting mechanism, and the lifting mechanism is used to drive the molding lower mold to move up and down.

11. A method for forming composite curvature glass, characterized in that: include, A heating step, heating the glass in a heating chamber; the heated glass is output from the heating chamber via a conveying mechanism; In the first forming step, a forming device receives the glass outputted by the conveying mechanism, and a plurality of first air holes are arranged on the lower forming surface of the forming device. The plurality of first air holes blow out gas through a first ventilation structure to support the glass outputted by the conveying mechanism on the lower forming surface, so that the heated glass moves to the lower forming surface of the forming device in a suspended state. Molding step two, after molding step one, control the wind pressure and wind wheel of the first ventilation structure so that the wind pressure and air volume blown out by the multiple first air holes gradually decrease, so that the glass gradually falls onto the lower molding surface, and a first air film layer matching the structure of the lower molding surface is formed between the glass and the lower molding surface, so that the lower surface of the glass and the lower molding surface are molded in a non-physical contact state.

12. The method for forming composite curvature glass according to claim 11, characterized in that: The method further comprises a molding step 3, wherein after the molding step 2, the lower molding surface of the molding device moves upward under the action of the lifting mechanism, and cooperates with the upper molding surface of the molding device to form a molding interval matching the curvature of the finished glass product; The second air holes on the upper molding surface of the molding device blow out gas through the second ventilation structure to form a second air film layer matching the structure of the upper molding surface on the upper molding surface, so that the upper surface of the glass is molded in a non-physical contact state with the upper molding surface.

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