A hot bending forming method for curved glass

Abstract

A method for hot bending of curved glass, before the glass enters the forming device, the arc adjustment transmission component automatically adjusts the arc to the target radius according to the size of the target arc, and then the arc changing lifting transmission group lifts the end of the arc changing mechanism to a certain height, so that the arc changing mechanism changes from a flattened state to an arc state with one end tilted, and an arc channel consistent with the size of the target arc is formed between the pressure roller and the supporting roller, and then the glass enters the arc channel and is gradually bent at a certain temperature; the unloading mechanism is connected to the end of the arc changing mechanism conveying the glass, and the unloading mechanism is adjusted by a power mechanism to switch between a receiving position and a sending position, at the receiving position, the unloading mechanism receives the glass output by the arc changing mechanism, and at the sending position, the unloading mechanism sends the bent glass to the next process. The hot bending production of curved glass can be realized without molds, and at the same time, it has the characteristics of high production capacity, low power consumption, and high repeatability.

Description

Technical Field

[0001] The invention relates to the technical field of arc glass processing, and in particular to a hot bending forming method for arc-shaped curved glass. Background Art

[0002] At present, the hot bending of curved glass at home and abroad can be roughly divided into two categories. The first category is to place one or more molds consistent with the target arc in the heating zone, place the glass on the mold, and then heat it until the glass softens, until the glass and the mold are completely fitted, and then the heating zone begins to gradually drop to ambient temperature, and then the glass is taken out; the second category is to use multiple molds, the glass is placed on the mold, and circulates in the heating area, the cold zone and the sheet removal area respectively, which can realize multi-station continuous production. These two types of process methods have high energy consumption, low production efficiency, and low repetitive accuracy of products after hot bending of glass to varying degrees. In the production process of glass of uniform specifications, a large number of molds need to be prepared, and the preparation and storage of molds are also difficult problems that need to be solved. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the above technical problems and to propose a hot bending forming method for curved glass, which can realize the hot bending production of curved glass without molds and has the characteristics of high production capacity, low power consumption and high repetition accuracy.

[0004] The technical solution adopted by the present invention is: a method for hot bending of curved glass, comprising:

[0005] The step of loading the glass to be processed into a loading plate through the loading plate area;

[0006] The step of heating the loaded glass in a heating zone;

[0007] The step of bending the heated glass through a forming device;

[0008] The step of unloading the bent glass from the unloading area;

[0009] The step of bending the heated glass through a forming device comprises the following steps:

[0010] S1. Before the glass enters the forming device, the arc-adjusting transmission assembly automatically adjusts the arc to the target radius according to the size of the target arc, and then the arc-changing lifting transmission group lifts the end of the arc-changing mechanism to a certain height, so that the arc-changing mechanism changes from a flat state to an arc state with one end tilted, and forms an arc channel with the same size as the target arc between the pressure roller and the supporting roller, and then the glass enters the arc channel and is gradually bent and formed at a certain temperature;

[0011] S2. The unloading mechanism is connected to the end of the glass conveyed by the arc-changing mechanism, and the unloading mechanism is adjusted by the power mechanism to switch between the receiving position and the delivery position. At the receiving position, the unloading mechanism receives the glass output by the arc-changing mechanism, and at the delivery position, the unloading mechanism delivers the bent glass to the next process.

[0012] Further optimization, in the step S2: the sheet unloading mechanism adopts a flexible conveying method or a rigid conveying method.

[0013] Further optimization, in the S2 step:

[0014] The sheet unloading mechanism comprises a flexible flip sheet unloading mechanism and a flip sheet unloading mechanism lifting transmission group, and the flip sheet unloading mechanism lifting transmission group outputs power to enable the flexible flip sheet unloading mechanism to switch between a receiving position and a sending position;

[0015] When the arc-changing mechanism is lifted to the target arc, one end of the flexible flipping unloading mechanism is lifted along with the arc-changing mechanism, and the other end is lifted to a certain height, so that the upper surface of the flexible flipping unloading mechanism is at a tangent position to the arc radius circle of the arc mechanism. At this time, it is in the receiving position, and the roller conveys the bent glass into the upper surface of the flexible flipping unloading device; when all the glass is on the upper surface of the flexible flipping unloading mechanism, adjust the end of the flexible flipping unloading mechanism away from the arc-changing mechanism to descend to the initial position. At this time, it is in the sending position, and the flexible unloading mechanism conveys the bent glass to the next process.

[0016] Further optimization also includes a cooling unit for cooling the glass after bending and forming.

[0017] Further optimization is carried out in step S1, by setting a heating element, a temperature gradient from high to low is formed along the direction of glass process.

[0018] Further optimization, the glass bending process is completed in a closed cavity, and thermal insulation materials are laid on the four walls of the cavity.

[0019] For further optimization, a heating unit is provided in the cavity, through which the temperature of the hot bending forming device area is heated to a required temperature range, and a temperature gradient from high to low required by the process is formed at the entrance and exit of the glass.

[0020] Further optimized, the heating unit includes an upper heating unit and a lower heating unit, wherein the upper heating unit and the lower heating unit can maintain a fixed position relationship with the upper and lower surfaces of the glass as the arc changes.

[0021] Further optimization is that high temperature resistant adhesive rubber rings are attached to the support rollers and the pressure rollers to facilitate the glass to climb to the upper surface of the unloading mechanism.

[0022] A hot bending forming device for curved curved glass, which is provided with a loading unit, a heating unit, a glass hot bending forming unit and a glass taking unit in sequence along the direction of glass travel, and the glass to be processed is processed through loading, heating, hot bending and unloading;

[0023] The glass hot bending forming unit comprises:

[0024] The arc-changing mechanism, the arc-adjusting transmission assembly and the arc-changing lifting transmission group, the arc-adjusting transmission assembly automatically adjusts the arc to the target radius according to the size of the target arc, and then the arc-changing lifting transmission group lifts the end of the arc-changing mechanism to a certain height, so that the arc-changing mechanism changes from a flat state to an arc state with one end tilted, and forms an arc channel with the same size of the target arc between the pressure roller and the supporting roller, so that the glass enters the arc channel and is gradually bent into shape;

[0025] The flexible flip unloading mechanism and the flip unloading mechanism lifting transmission group, the flexible flip unloading mechanism is arranged at the end of the glass conveying by the arc changing mechanism, the flip unloading mechanism lifting transmission group drives the flexible flip unloading mechanism to move, so that it switches between the receiving position and the sending position. At the receiving position, the flexible flip unloading mechanism receives the glass output by the arc changing mechanism, and at the sending position, the flexible flip unloading mechanism sends the bent glass to the next process.

[0026] The beneficial effects of the present invention are:

[0027] This solution optimizes the method and equipment for hot bending of glass, and can realize the hot bending production of curved glass without molds, while having the characteristics of high production capacity, low power consumption, and high repeatability. Compared with the prior art, the curved glass forming method involved in the present invention is novel and unique in conception and easy to implement; at the same time, compared with the current technical status in the industry, the production capacity is increased exponentially, the effect is very significant, and the labor intensity of workers is reduced, and the product size accuracy and surface optical properties are greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a process flow chart of the present invention;

[0029] Figure 2 It is a schematic diagram of the structure of the molding device in the present invention;

[0030] Figure 3 It is a structural schematic diagram of the forming device in the receiving position and the sending position;

[0031] Figure numerals: 1. arc changing mechanism, 2. lower heating unit, 3. upper heating unit, 4. pressure roller, 5. support roller, 6. arc changing lifting transmission group, 7. flexible flipping and unloading mechanism, 8. flipping and unloading mechanism lifting transmission group, 9. roller power input unit, 10. arc adjusting transmission assembly, 11. thermal insulation wall panel. DETAILED DESCRIPTION

[0032] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0033] It should be noted that the creators of this technical solution have been engaged in the development and research of hot bending of glass and equipment for curved tempered glass for a long time, and have accumulated rich practical experience. They have creatively developed a method and device for hot bending of curved glass. This method can realize the mold-free hot bending production of curved glass, and at the same time has the characteristics of high production capacity, low power consumption, and high repeatability.

[0034] The present invention is described in detail below with reference to the accompanying drawings: Figure 1 As shown, a method for hot bending of curved glass comprises the following steps: a step of loading the glass to be processed into an upper sheet through an upper sheet area; a step of heating the loaded glass through a heating area; a step of bending the heated glass through a forming device; a step of unloading the bent glass through a lower sheet area; wherein: the step of bending the heated glass through a forming device comprises the following:

[0035] S1. Before the glass enters the forming device, the arc-adjusting transmission assembly automatically adjusts the arc to the target radius according to the size of the target arc, and then the arc-changing lifting transmission group lifts the end of the arc-changing mechanism to a certain height, so that the arc-changing mechanism changes from a flat state to an arc state with one end tilted, and forms an arc channel with the same size as the target arc between the pressure roller and the supporting roller, and then the glass enters the arc channel and is gradually bent and formed at a certain temperature;

[0036] S2. The unloading mechanism is connected to the end of the glass conveyed by the arc-changing mechanism, and the unloading mechanism is adjusted by the power mechanism to switch between the receiving position and the delivery position. At the receiving position, the unloading mechanism receives the glass output by the arc-changing mechanism, and at the delivery position, the unloading mechanism delivers the bent glass to the next process.

[0037] It should be noted that: the above describes that the unloading mechanism is connected to the end of the glass conveying by the arc-changing mechanism, and the posture of the unloading mechanism is adjusted by the power mechanism to switch it between the receiving position and the sending position. The unloading mechanism described here can be a flip unloading mechanism, or a platform transfer or other glass relay transfer method; in addition, the unloading mechanism can adopt a flexible conveying method such as a conveyor belt or a rigid conveying method such as a roller; the structure adopted in this embodiment is as follows: the unloading mechanism includes a flexible flip unloading mechanism 7 and a flip unloading mechanism lifting transmission group 8, and the flip unloading mechanism lifting transmission group 8 outputs power to make the flexible flip unloading mechanism 7 switch between the receiving position and the sending position; when the arc-changing mechanism After the arc mechanism 1 is lifted to the target curvature, one end of the flexible flip unloading mechanism 7 is lifted along with the arc changing mechanism 1 and is at the same height as the end of the output glass of the arc changing mechanism 1, and the other end is lifted to a certain height, so that the upper surface of the flexible flip unloading mechanism 7 is at a tangent position to the arc radius circle of the arc mechanism 1, and is now in a receiving position, and the roller conveyor sends the bent glass to the upper surface of the flexible flip unloading device 7; when all the glass is on the upper surface of the flexible flip unloading mechanism 7, adjust the end of the flexible flip unloading mechanism away from the arc changing mechanism to descend to the initial position, and is now in a sending position, and the flexible flip unloading mechanism 7 sends the bent glass to the next process, such as sending it to the roller conveyor in the cooling unit.

[0038] like Figure 1 As shown, a process flow chart of a hot bending forming method of arc-shaped curved glass of the present invention is as shown in the figure: the glass is placed on a loading table in advance, and then enters the heating stage. After being heated to the deformation temperature in the heating area, it is transported to the hot bending forming area. After hot bending forming, it is transferred to the cooling area through flexible flipping and unloading. After further cooling, it is transported to the sheet taking area to complete the entire hot bending forming process.

[0039] As attached Figure 2 and Figure 3 As shown in the figure: before the glass enters the forming device, the arc adjustment transmission assembly 10 automatically adjusts the arc to the target radius according to the size of the target arc, and then the arc change lifting transmission group 6 lifts the end of the arc change mechanism 1 to a certain height, so that the arc change mechanism 1 is attached Figure 2 The flattened state shown in the figure changes to an arc-shaped state with one end raised, as shown in Figure 3As shown, one end of the arc-changing mechanism 1 close to the heating unit 13 is kept in a fixed position for connecting the glass output by the heating unit, and the other end is tilted by the arc-changing lifting component 6 and the arc-adjusting transmission component 10 to finally form an arc consistent with the target curvature; the flexible flip unloading device 7 can rotate with the end of the arc-changing mechanism. After the arc-changing mechanism is lifted to the target curvature, one end of the flexible flip unloading device is lifted with the arc-changing mechanism, and the other end is also lifted to a certain height, so that the upper surface of the flexible flip unloading device is roughly in a tangent position to the arc radius circle of the arc mechanism, so as to facilitate the roller to move the glass along the tangential direction to the upper surface of the flexible flip unloading device. When all the glass is on the upper surface of the flexible flip unloading device, the glass is synchronously conveyed on the unloading device, and at the same time, the other end of the unloading device descends to the initial position and is connected with the conveying roller of the cooling unit.

[0040] During the hot bending process of glass, an upper heating unit 3 and a lower heating unit 2 are arranged at the upper and lower positions of the roller. The upper and lower heating units heat the temperature of the hot bending forming device area to the required temperature range, and form a temperature gradient from high to low required by the process at the input and output ends of the glass; in addition, the spacing between all the pressure rollers and the support rollers can also be adjusted to form an arc channel between the pressure rollers and the support rollers that matches the thickness of the glass.

[0041] In addition, taking into account the changes in ambient temperature, the above-mentioned glass bending and forming process can be completed in a closed cavity, for example: a tubular cavity with closed doors at both ends is used, and insulation materials are laid on the four walls of the cavity, such as insulation wall panels 11, etc.; a heating unit can also be arranged in the cavity, and the temperature of the hot bending and forming device area is heated to the required temperature range by the heating unit, and a temperature gradient from high to low required by the process is formed at the input and output ends of the glass. It should be noted that: this temperature gradient can be set according to the process requirements. This is an existing mature technology and will not be described in detail.

[0042] It should be noted that the above-mentioned insulation facility must have the function of rapid cooling when the equipment encounters an emergency that needs to be handled.

[0043] The heating unit described above comprises an upper heating unit 3 and a lower heating unit 2, wherein the upper heating unit 3 and the lower heating unit 3 can maintain a fixed position relationship with the upper and lower surfaces of the glass as the arc changes.

[0044] In this solution, the support roller 5 and the pressure roller 4 are attached with high temperature resistant adhesive rubber rings to facilitate the glass to climb to the upper surface of the unloading mechanism.

[0045] It should be noted that in this solution, the lower idler roller and the upper pressure roller can be quickly replaced, and the height of the pressure roller can be adjusted to form an arc channel between the pressure roller and the idler roller that matches the glass thickness.

[0046] like Figure 1-3 As shown, a hot bending forming device for curved curved glass is provided with a loading unit, a heating unit, a glass hot bending forming unit, a sheet taking unit and other auxiliary systems in sequence along the direction of glass travel, such as a heating unit, a roller power input unit, etc. The glass to be processed is processed through loading, heating treatment, hot bending forming and unloading; the glass hot bending forming unit comprises an arc changing mechanism 1, an arc adjusting transmission assembly 10, an arc changing lifting transmission group 6, a flexible flipping unloading mechanism 7 and a flipping unloading mechanism lifting transmission group 8, wherein

[0047] The arc changing mechanism 1, the arc adjusting transmission assembly 10 and the arc changing lifting transmission group 6, the arc adjusting transmission assembly 10 automatically adjusts the arc to the target radius according to the size of the target arc, and then the arc changing lifting transmission group 6 lifts the end of the arc changing mechanism 1 to a certain height, so that the arc changing mechanism 1 changes from a flat state to an arc state with one end raised, and the arc adjusting transmission assembly 10 forms an arc channel consistent with the size of the target arc between the pressure roller and the supporting roller, so that the glass enters the arc channel and is gradually bent into shape; the flexible flip unloading mechanism 7 and the flip unloading mechanism lifting transmission group 8, the flexible flip unloading mechanism 7 is arranged at the end of the arc changing mechanism 1 for conveying glass, and the flip unloading mechanism lifting transmission group 8 drives the flexible flip unloading mechanism 7 to move, so that it switches between the receiving position and the sending position. At the receiving position, the flexible flip unloading mechanism receives the glass output by the arc changing mechanism, and at the sending position, the flexible flip unloading mechanism sends the bent glass to the next process.

[0048] It should be noted that the above device also includes other undescribed auxiliary components, such as brackets, guide plates, roller power units, heating elements and other auxiliary components. Other auxiliary components can adopt existing structures and settings, and will not be described in detail here.

[0049] An upper heating unit 3 and a lower heating unit 2 are respectively provided at the upper and lower positions of the glass to be processed. The upper and lower heating units heat the temperature in the hot bending forming area to the required temperature range and form a temperature gradient from high to low required by the process at the entrance and exit of the glass.

[0050] During operation, after the glass reaches the deformation temperature in the heating area, it is transported and moves in the arc channel formed by the pressure roller and the support roller. During the movement of the glass, it is deformed into arc glass along the arc channel; since there is a forced temperature gradient in the travel direction of the hot bending forming device, after leaving the arc channel, the temperature of the glass has dropped to the non-deformable temperature zone and is transported to the flexible flip unloading mechanism; the flexible flip unloading mechanism rotates around the end of the arc changing mechanism and is rotated down to the sheet picking height; after the glass leaves, the flexible flip unloading mechanism is lifted to the sheet joining height again, waiting for the next piece of glass to leave the arc channel.

[0051] It should be noted that although the present invention is described by the above embodiments, the present invention may also have other various embodiments. Without departing from the spirit and scope of the present invention, it is obvious that those skilled in the art may make various corresponding changes and deformations to the present invention, but these changes and deformations should all fall within the scope of protection of the appended claims of the present invention and their equivalents.

Claims

1. A method for hot bending of curved glass, comprising: The step of loading the glass to be processed into a loading plate through the loading plate area; The step of heating the loaded glass in a heating zone; The step of bending the heated glass through a forming device; The step of unloading the bent glass from the unloading area; The invention is characterized in that: the step of bending the heated glass through a forming device comprises the following steps: S1. Before the glass enters the forming device, the arc-adjusting transmission assembly automatically adjusts the arc to the target radius according to the size of the target arc, and then the arc-changing lifting transmission group lifts the end of the arc-changing mechanism to a certain height, so that the arc-changing mechanism changes from a flat state to an arc state with one end tilted, and forms an arc channel with the same size as the target arc between the pressure roller and the supporting roller, and then the glass enters the arc channel and is gradually bent and formed at a certain temperature; S2. The unloading mechanism is connected to the end of the glass conveyed by the arc-changing mechanism, and the unloading mechanism is adjusted by the power mechanism to switch between the receiving position and the delivery position. At the receiving position, the unloading mechanism receives the glass output by the arc-changing mechanism, and at the delivery position, the unloading mechanism delivers the bent glass to the next process.

2. The method for hot bending of curved glass according to claim 1, characterized in that: In the step S2: the film unloading mechanism adopts a flexible conveying method or a rigid conveying method.

3. The method for hot bending of curved glass according to claim 1, characterized in that: In the S2 step: The sheet unloading mechanism comprises a flexible flip sheet unloading mechanism and a flip sheet unloading mechanism lifting transmission group, and the flip sheet unloading mechanism lifting transmission group outputs power to enable the flexible flip sheet unloading mechanism to switch between a receiving position and a sending position; When the arc-changing mechanism is lifted to the target arc, one end of the flexible flipping unloading mechanism is lifted along with the arc-changing mechanism, and the other end is lifted to a certain height, so that the upper surface of the flexible flipping unloading mechanism is at a tangent position to the arc radius circle of the arc mechanism. At this time, it is in the receiving position, and the roller conveys the bent glass into the upper surface of the flexible flipping unloading device; when all the glass is on the upper surface of the flexible flipping unloading mechanism, adjust the end of the flexible flipping unloading mechanism away from the arc-changing mechanism to descend to the initial position. At this time, it is in the sending position, and the flexible unloading mechanism conveys the bent glass to the next process.

4. The method for hot bending of curved glass according to claim 1, characterized in that: The invention also comprises a cooling unit for cooling the bent glass.

5. The method for hot bending of curved glass according to claim 1, characterized in that: In step S1, a heating element is set to form a temperature gradient from high to low along the direction of glass processing.

6. The method for hot bending of curved glass according to claim 1, characterized in that: The glass bending process is completed in a closed cavity, and thermal insulation materials are laid on the four walls of the cavity.

7. The method for hot bending of curved glass according to claim 6, characterized in that: A heating unit is arranged in the cavity, and the temperature of the hot bending forming device area is heated to a required temperature range by the heating unit, and a temperature gradient from high to low required by the process is formed at the inlet and outlet ends of the glass.

8. The method for hot bending of curved glass according to claim 7, characterized in that: The heating unit comprises an upper heating unit and a lower heating unit, wherein the upper heating unit and the lower heating unit can maintain a fixed position relationship with the upper and lower surfaces of the glass as the arc changes.

9. The method for hot bending of curved glass according to claim 1, characterized in that: The support roller and the pressure roller are attached with high temperature resistant adhesive rubber rings, which facilitates the glass to climb to the upper surface of the unloading mechanism.

10. A device for hot bending of curved glass, which is provided with a loading unit, a heating unit, a glass hot bending unit and a glass taking unit in sequence along the direction of glass travel, and the glass to be processed is processed through loading, heating, hot bending and unloading; Features: The glass hot bending forming unit comprises: The arc-changing mechanism, the arc-adjusting transmission assembly and the arc-changing lifting transmission group, the arc-adjusting transmission assembly automatically adjusts the arc to the target radius according to the size of the target arc, and then the arc-changing lifting transmission group lifts the end of the arc-changing mechanism to a certain height, so that the arc-changing mechanism changes from a flat state to an arc state with one end tilted, and forms an arc channel with the same size of the target arc between the pressure roller and the supporting roller, so that the glass enters the arc channel and is gradually bent into shape; The flexible flip unloading mechanism and the flip unloading mechanism lifting transmission group, the flexible flip unloading mechanism is arranged at the end of the glass conveying by the arc changing mechanism, the flip unloading mechanism lifting transmission group drives the flexible flip unloading mechanism to move, so that it switches between the receiving position and the sending position. At the receiving position, the flexible flip unloading mechanism receives the glass output by the arc changing mechanism, and at the sending position, the flexible flip unloading mechanism sends the bent glass to the next process.

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