CN209759292U - Hot pneumatic forming device and forming system for curved glass - Google Patents
Hot pneumatic forming device and forming system for curved glass Download PDFInfo
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- CN209759292U CN209759292U CN201920011088.5U CN201920011088U CN209759292U CN 209759292 U CN209759292 U CN 209759292U CN 201920011088 U CN201920011088 U CN 201920011088U CN 209759292 U CN209759292 U CN 209759292U
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Abstract
The utility model discloses a to prior art produce the indentation easily when shaping curved surface glass or cause the great condition of curved surface glass base plate size precision error, a steam dynamic forming device and the forming system for curved surface glass is provided, it includes forming die and pneumatic design worker station, forming die includes mould and lower mould, it is provided with the shaping face on the surface respectively that mould and lower mould are relative each other to go up mould, form the die cavity between two shaping faces when going up mould and lower mould compound die, the curved surface shape of the shaping face of die cavity, the interval between size and two upper and lower shaping faces makes the glass after the shaping accord with 3D curved surface glass's design dimensional requirement, the edge of die cavity is provided with overflows the chamber, overflow chamber and die cavity intercommunication, set up the gas passage who runs through lower mould on the shaping face of lower mould, adopt the utility model discloses can avoid the mould to be in glass base plate size precision's the prerequisite of guaranteeing curved surface glass's curved surface The surface of the plate is unnecessarily indented.
Description
Technical Field
The utility model relates to a curved surface glass base board machine-shaping field, in particular to a steam moves forming device and molding system for curved surface glass.
Background
The forming method of 3D curved glass in the market at present mainly comprises a gravity bending method and a pneumatic forming method. The method comprises the steps of heating a glass blank plate blank to a softening point to enable glass to reach a softening state, conveying the heated glass blank plate blank to a forming die of a forming furnace, wherein the forming die is provided with a concave forming surface, and the glass blank plate blank is sagged and bent to the concave forming surface by means of the gravity of the glass blank plate blank, so that the curved glass blank plate is formed. In order to reduce the profile tolerance error, the glass blank is heated to a softened state and then is extruded into a preset shape by a die, but the extrusion can form more indentations on the curved surface of the curved glass blank, so that the produced glass has high roughness, the subsequent operations such as grinding and polishing are difficult, the yield is generally low, and the large-scale mass production is difficult.
In the pneumatic forming method, the upper concave surface of the curved glass is pressed by air pressure, so that the phenomenon that the upper mold directly presses the glass to cause indentation is avoided, but in the method, the softened glass is easily gathered at a lower position of the curved surface under the action of gravity, and ripples are easily blown out of the surface of the glass when the glass is blown into the surface of the glass, so that the profile error of the 3D curved glass is not easily ensured, and the curved surface is often subjected to subsequent polishing after forming.
In short, the existing method and equipment are adopted to carry out the curved surface forming of the 3D curved surface glass, and the follow-up processing of improving the precision such as grinding and polishing the curved surface is needed, but the curved surface glass which is large in surface area, has radian and is not very high in material strength per se is difficult to grind and polish, more manpower and material resources can be wasted in the process, the yield is low, the production efficiency is greatly limited, and the influence caused particularly in large-scale mass production is hardly ignored.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a hot pneumatic forming device and a forming system for curved surface glass to the prior art produces the indentation easily or causes the great condition of curved surface glass base plate size precision error when carrying out the shaping to curved surface glass, can avoid the mould to form the unnecessary indentation on glass base plate surface under the prerequisite of guaranteeing curved surface glass's curved surface part size precision.
The above technical purpose of the present invention can be achieved by the following technical solutions:
A hot pneumatic forming device for curved glass comprises a forming die and a pneumatic shaping station, wherein the forming die comprises an upper die and a lower die, forming surfaces are respectively arranged on the surfaces of the upper die and the lower die, which are opposite to each other, a cavity is formed between the two forming surfaces when the upper die and the lower die are closed, the curved surface shape and size of the forming surface of the cavity and the distance between the upper forming surface and the lower forming surface enable the formed glass to meet the design size requirement of 3D curved glass, an overflow cavity is arranged at the edge of the cavity, and the overflow cavity is communicated with the cavity; a gas channel penetrating through the lower die is formed on the molding surface of the lower die; after the upper die and the lower die are closed, the cavity can be communicated with the outside only through a gas channel; the pneumatic shaping station comprises a bottom plate, a lower heating plate fixedly connected to the upper surface of the bottom plate, an upper heating plate arranged above the lower heating plate, a power device for driving the upper heating plate to slide up and down, an upper plate for supporting the power device and an air exhaust device communicated with an upper gas channel of the lower die;
The bottom plate and the lower heating plate are respectively provided with an exhaust channel communicated with a gas channel on the lower die, and the air exhaust device is communicated with the gas channel through the exhaust channel;
A gas channel penetrating through the upper die is formed on the forming surface of the upper die;
An air inlet channel communicated with an air channel on the upper die is arranged on the upper heating plate, and the air charging device is communicated with the air channel through the air inlet channel;
And a supporting device is arranged between the upper die and the lower die, and supports the upper die above the lower die and is higher than the height of the upper die during die closing.
a molding system comprises a workbench, a mold moving device and the hot pneumatic molding device for curved glass, wherein the workbench comprises a mold operating area, a preheating working area, a preforming working area, a pneumatic shaping working area, a slow cooling working area and a cooling working area which are sequentially arranged, the mold operating area is provided with a mold opening device, the preheating working area is provided with a heating device for heating a shaping mold and a glass blank plate on the shaping mold, the preforming working area is provided with a mold closing device for closing the upper mold and the lower mold, and a pneumatic shaping work station is arranged in the pneumatic shaping working area; the mold moving device conveys the forming mold from the previous working area to the next working area;
the workbench is arranged in a ring shape, the cooling working area is communicated with the mould operating area, and the mould moving device conveys the forming mould on the cooling working area to the mould operating area;
A discharging buffer zone is also arranged between the cooling working zone and the pneumatic shaping working zone, and a feeding buffer zone is arranged between the die operating zone and the preheating zone.
the utility model discloses following beneficial effect has:
The hot pneumatic forming device for the curved glass in the utility model can ensure that the size of the formed glass meets the design size requirement of a 3D curved glass finished product due to the curved shape of the cavity and the space between the upper and the lower forming surfaces, when the softened glass blank plate enters the cavity, the relationship between the softened glass blank plate and the cavity is formed, the thickness of the glass blank plate is thicker, for example, at the upper limit deviation, the thickness of the glass in the softened state is possibly larger than the distance between the upper molding surface and the lower molding surface of the cavity, the softened glass is contacted with the molding surface of the cavity during molding, but because the glass is softened and has an overflow cavity, the glass flows to the overflow cavity, the upper and lower molding surfaces can not extrude the softened glass, therefore, the surface of the formed glass is smooth, and the size and the shape of the obtained finished glass can meet the design size requirement of the 3D curved glass due to the size constraint of the cavity; when the thickness of the glass blank plate is thin, for example, the thickness of the glass blank plate is in a lower limit deviation, the distance between the thickness of the glass blank plate and the upper forming surface and the lower forming surface of the cavity is smaller after the glass blank plate is in a softened state, the softened glass cannot be in contact with the forming surface of the cavity during forming, and qualified finished product 3D curved glass is obtained, or because a local point formed in the glass bending process is in contact with the forming surface of the upper die, the glass at a higher position can move to a lower point, the forming surface of the upper die cannot extrude the higher position, and the thickness of the whole curved glass meets the requirement of the design size and is smooth. Through setting up the die cavity, overflowing chamber and gas channel, make the mould can realize the pneumatic shaping to the glass slab, realize heating pressurization and bleeding to forming die through pneumatic design worker station, utilize the atmospheric pressure difference of surface about the glass to realize glass's extrusion, avoided the mould to cause the unnecessary indentation on the glass surface, effectively reduce glass's indentation, reduce the later stage polishing degree of difficulty, promote the product yield, improve production efficiency, saved manufacturing cost. The integral structure of the forming system is beneficial to realizing the automatic cycle of the forming of the curved glass, and the production efficiency can be obviously improved.
Drawings
FIG. 1 is a schematic view of an embodiment of the present invention of a thermopneumatic molding apparatus for curved glass;
FIG. 2 is a schematic structural view of a forming mold in an embodiment of the thermal pneumatic forming device for curved glass according to the present invention;
Fig. 3 is a schematic view of the molding system of the present invention.
reference number legend, 100, glass blank;
200. Forming a mold; 210. an upper die mold; 220. a lower die mold; 230. a gas channel; 240. an overflow chamber; 250. a cavity;
300. A pneumatic shaping work station; 310. a base plate; 320. a lower heating plate; 330. an upper heating plate; 340. an upper plate; 350. a power plant; 360. an air intake passage; 370. an exhaust passage;
400. a work table; 410. a mold operating area; 420. preheating a working area; 430. performing a working area; 440. a pneumatic shaping working area; 450. slowly cooling the working area; 460. cooling the working area; 470. a feed buffer zone; 480. a discharge buffer zone;
500. And (4) a mould moving device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. In which like parts are designated by like reference numerals.
a thermopneumatic molding apparatus for curved glass, as shown in FIG. 1, includes a molding die 200 and a pneumatic setting station 300, which are required to cooperate with each other when performing pneumatic setting of a glass blank sheet 100.
As shown in fig. 2, the molding die 200 includes an upper die 210 and a lower die 220, molding surfaces are respectively provided on surfaces of the upper die 210 and the lower die 220 facing each other, and a cavity 250 is formed between the two molding surfaces when the upper die 210 and the lower die 220 are closed. Wherein the molding surfaces of the lower mold 220 and the upper mold 210 mainly serve to determine the curved shape and size of the glass blank sheet 100. The shape and size of the molding surface of the cavity 250, the distance between the upper molding surface and the lower molding surface, the surface smoothness and the like are required to ensure that the size of the molded glass conforms to the design size of a 3D curved glass finished product. The edge of the cavity 250 is provided with an overflow chamber 240, and the overflow chamber 240 is communicated with the cavity 250. After the mold is closed, the softened glass can be pre-shaped into a desired shape in the cavity 250, and the excess glass that may exist will flow into the overflow cavity 240, so that the upper mold 210 will not cause excessive extrusion to the softened glass blank 100, thereby avoiding the occurrence of indentation. It should be noted that the specific size of the cavity 250 needs to take the shrinkage rate of the glass into consideration, and the specific size should be determined according to the principle of mold design, so as to ensure that the curved shape and dimensional accuracy of the glass produced under the constraint of the cavity 250 can meet the requirements.
The lower mold 220 is provided with a gas passage 230, and the gas passage 230 communicates the cavity 250 with the outside of the molding mold 200, so as to realize air suction through the lower mold 220. Preferably, the upper mold 210 is also provided with a gas passage 230 for communicating the cavity 250 with the outside of the molding die 200, so as to realize inflation through the upper mold 210. The gas channel 230 is relatively small, less than 2mm, to ensure that the glass does not enter the gas channel 230, and the edges of the gas channel 230 do not mark the surface of the glass blank 100.
The pneumatic setting station 300 is used to perform air suction, heating of the forming mold 200 and the glass blank sheet 100 therein, and locking of the relative positions of the upper mold 210 and the lower mold 220 in the clamped state. The pneumatic sizing station 300 includes a base plate 310, a lower heating plate 320 fixedly attached to an upper surface of the base plate 310, an upper heating plate 330 disposed above the lower heating plate 320, a power unit 350 for driving the upper heating plate 330 to slide up and down, an upper plate 340 for supporting the power unit 350, and a suction unit (not shown) communicating with the gas passage 230 of the lower mold 220. When the preformed molding die 200 is fed between the upper heating plate 330 and the lower heating plate 320, the power unit 350 drives the upper heating plate 330 to move downward and press the upper mold 210, and at this time, the upper heating plate 330 and the lower heating plate 320 clamp the molding die 200 and lock it in a mold clamping state, and at the same time, the upper heating plate 330 and the lower heating plate 320 generate heat, and heat the molding die 200 and the glass blank sheet 100 therein, so that the glass blank sheet 100 is kept in a softened state and is evacuated by the evacuation unit, and a pressure difference is formed between the upper and lower surfaces of the glass blank sheet 100, and the shape thereof is changed by the air pressure.
the utility model discloses a steam pneumatic forming device for curved surface glass accomplishes glass's final design through pneumatic forming, utilizes the atmospheric pressure difference between the upper and lower surface of glass to realize the extrusion to glass. In the process, the size of the cavity takes the expansion factors of the glass blank 100 in the melting state and the forming state into consideration, and the most ideal state is that the volume of the cavity 250 is just equivalent to the volume of the molten glass, so that the upper mold 210 and the molten glass blank 100 are only in simple contact relation and have no mutual pressure, so that the upper mold 210 does not extrude the softened glass blank 100, and even if the contact occurs, the molten glass moves due to flowing, the surface of the glass is restored to be flat, the formed glass blank 100 has no indentation caused by the upper mold 210, meanwhile, the upper mold 210 can ensure the curved surface shape and the dimensional accuracy of the 3D curved surface glass, and the most undesirable condition is that the volume of the cavity is smaller than the volume of the molten glass, and the softened glass enters the overflow cavity 240 under the restriction of the cavity 250, the upper mold 210 still does not extrude the molten glass, so that indentations formed by extrusion of the upper mold are not formed on the surface of the glass in the molding process, and the molded 3D curved glass does not need to be polished. Although probably overflowing the unnecessary glass of intracavity 240 in shaping, the unnecessary glass at glass edge can be got rid of through cutting or polishing in later stage, compare in the work of polishing, polishing whole glass curved surface and operate more easily, use the utility model discloses a machining efficiency and yield for curved surface glass's steam moves forming device are higher, save the processing cost more. In addition, the excessive gas between the glass blank 100 and the lower mold 220 can be discharged out of the mold or into the overflow chamber 240 from the gas passage 230 of the molding die 200, and the occurrence of blisters or bubbles on the glass can be prevented.
Preferably, the pneumatic shaping station 300 further includes an air-filling device (not shown) in cooperation with the air passage 230 of the upper mold 210, and the air-filling device is communicated with the air passage 230 of the upper mold 210, so as to fill air from above the glass while performing air-filling.
in order to better ensure the air tightness of the connection between the air extractor and the air charger and the forming mold 200 when each forming mold 200 moves to the pneumatic shaping station 300. It is preferable that a gas exhaust passage 370 communicating with the gas passage 230 of the lower mold 220 is provided on the lower plate 310 and the lower heating plate 320, respectively, and the gas exhaust means communicates with the gas passage 230 through the gas exhaust passage 370. An air inlet passage 360 communicating with the gas passage 230 of the upper mold 210 is provided on the upper heating plate 330, and the inflator communicates with the gas passage 230 through the air inlet passage 360. Therefore, when the sealing communication of the gas channel, the inflation device and the air exhaust device is ensured, the exhaust channel 370 (the air inlet channel 360) and the gas channel 230 can be aligned and communicated only by moving the forming die 200 to a proper position, the sealing can be realized only by tightly attaching the heating plate and the upper plane and the plane of the forming die 200, the quick and large-scale production can be realized, and the production efficiency is improved.
a molding system, as shown in FIG. 3, includes a table 400, a mold transfer device 500, a heating device, a mold opening device, a mold closing device, and the above-mentioned thermopneumatic molding device for curved glass.
The platen 400 includes a mold operating zone 410, a pre-heat zone 420, a pre-form zone 430, a pneumatic sizing zone 440, a slow cool zone 450, and a cool down zone 460. The mold operating zone 410, the preheating operating zone 420, the preforming operating zone 430, the pneumatic shaping operating zone 440, the slow cooling operating zone 450, and the cooling operating zone 460 are sequentially disposed. The work table 400 is preferably formed in a ring structure such that the cooling work area 460 is followed by the mold work area 410 to facilitate the cycle of the molding process, which contributes to the improvement of the process efficiency.
The glass loading operation is performed in the mold operation area 410, and the glass blank 100 is placed on the lower mold 220 and the cooled glass blank 100 is taken out of the molding die 200. The mold opening device is provided in the mold operating area 410, and the mold opening device moves the upper mold 210 away from the upper mold 210 to prevent the upper mold 210 from interfering with the insertion and removal of the glass blank sheet 100. The mold opening device may move the upper mold 210 by a robot, or may open the mold by jacking up the upper mold 210 by a simple linear displacement device.
The heating means is provided in the preheating work area 420, and the glass blank plate 100 is heated to the softening point in the preheating work area 420 and then collapsed to be fitted to the lower mold 220, completing the step of S2 in the above method. The heating device may be an electric heating device, an infrared heating device, or the like.
The mold clamping device is provided in the preforming work area 430, and the mold clamping device moves the upper mold 210 to clamp the upper mold 210 and the lower mold 220, thereby completing step S2 in the above method. The mold clamping apparatus may move the upper mold 210 using a robot. Preferably, a supporting device is arranged between the upper die mold 210 and the lower die mold 220, the upper die mold 210 is supported above the lower die mold 220 and is higher than the height of the lower die mold during die closing, a certain space is reserved between the upper die mold 210 and the lower die mold 220 in the feeding and preheating processes, the upper die mold 210 is ensured not to influence the feeding and not to press the preheated glass blank plate 100 in the preheating zone, and meanwhile, the upper die mold 210 and the lower die mold 220 can be ensured to move on the workbench 400 synchronously. The supporting device may be an elastic structure to support the upper mold 210, such as a coil spring, a leaf spring, or the like, or a power device 350 such as an air cylinder, a hydraulic cylinder, or the like. In this case, the mold clamping device may be a simple linear displacement device to clamp the upper mold 210 downward.
The slow cooling of the molding die 200 is completed in the slow cooling work area 450. The cooling of the molding die 200 is completed in the cooling work area 460.
The mold transfer device 500 sequentially moves the molding die 200 and the glass blank sheet 100 therein from the die operation area 410 to the respective working areas while performing the molding of the glass blank sheet 100, and completes the respective steps in the molding process. The mold moving device 500 can adopt a plurality of linear driving devices to realize the movement by pushing the molding module; the movement of the molding die 200 may be performed by a conveyor belt or a combination of pushing and conveying, or a robot may be provided to perform a die-moving operation.
Preferably, an exit buffer 480 is provided between the cooling work zone 460 and the slow cooling work zone 450 and an entrance buffer 470 is provided between the mold operation zone 410 and the preheating zone. The forming die 200 can be temporarily stored in the feeding buffer area 470 and the discharging buffer area 480, and can play a role in coordinating different production steps, thereby being beneficial to ensuring the circular production.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.
Claims (8)
1. the utility model provides a thermopneumatic forming device for curved surface glass which characterized in that: the glass forming device comprises a forming die (200) and a pneumatic forming station (300), wherein the forming die (200) comprises an upper die (210) and a lower die (220), forming surfaces are respectively arranged on the surfaces, opposite to each other, of the upper die (210) and the lower die (220), a cavity (250) is formed between the two forming surfaces when the upper die (210) and the lower die (220) are closed, the curved surface shape and size of the forming surface of the cavity (250) and the distance between the upper forming surface and the lower forming surface enable the formed glass to meet the design size requirement of 3D curved glass, an overflow cavity (240) is arranged at the edge of the cavity (250), and the overflow cavity (240) is communicated with the cavity (250); a gas channel (230) penetrating through the lower die (220) is formed on the molding surface of the lower die (220); after the upper die mould (210) and the lower die mould (220) are closed, the cavity (250) can be communicated with the outside only through the gas channel (230); the pneumatic shaping station (300) comprises a bottom plate (310), a lower heating plate (320) fixedly connected to the upper surface of the bottom plate (310), an upper heating plate (330) arranged above the lower heating plate (320), a power device (350) driving the upper heating plate (330) to slide up and down, an upper plate (340) supporting the power device (350) and an air exhaust device communicated with an upper air channel (230) of the lower die (220).
2. The thermopneumatic forming apparatus for curved glass according to claim 1, wherein: the bottom plate (310) and the lower heating plate (320) are respectively provided with an exhaust channel (370) communicated with the gas channel (230) on the lower die mold (220), and the air extractor is communicated with the gas channel (230) through the exhaust channel (370).
3. The thermopneumatic forming apparatus for curved glass according to claim 1, wherein: the molding surface of the upper die (210) is provided with a gas channel (230) which penetrates through the upper die (210).
4. The thermopneumatic forming apparatus for curved glass according to claim 3, wherein: an air inlet channel (360) communicated with the air channel (230) on the upper die (210) is arranged on the upper heating plate (330), and the air charging device is communicated with the air channel (360) and the air channel (230).
5. the thermopneumatic forming apparatus for curved glass according to claim 1, wherein: a supporting device is arranged between the upper die mould (210) and the lower die mould (220), and the upper die mould (210) is supported above the lower die mould (220) and is higher than the height of the upper die mould during die closing.
6. A molding system, comprising a workbench (400), a mold moving device (500) and the hot pneumatic molding device for curved glass as claimed in any one of claims 1 to 5, wherein the workbench (400) comprises a mold operating area (410), a preheating operating area (420), a pre-molding operating area (430), a pneumatic shaping operating area (440), a slow cooling operating area (450) and a cooling operating area (460) which are arranged in sequence, the mold operating area (410) is provided with a mold opening device, the preheating operating area (420) is provided with a heating device for heating the molding mold (200) and the glass blank plate (100) thereon, the pre-molding operating area (430) is provided with a mold closing device for closing the upper mold (210) and the lower mold (220), and the pneumatic shaping station (300) is arranged at the pneumatic shaping operating area (440); the mold transfer device (500) transfers the molding die (200) from the previous work area to the next work area.
7. The molding system of claim 6, wherein: the work table (400) is arranged in a ring shape, the cooling work area (460) is communicated with the mould operation area (410), and the mould moving device (500) conveys the forming mould (200) on the cooling work area (460) to the mould operation area (410).
8. The molding system of claim 6, wherein: a discharging buffer area (480) is also arranged between the cooling working area (460) and the pneumatic shaping working area (440), and a feeding buffer area (470) is arranged between the die operating area (410) and the preheating area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920011088.5U CN209759292U (en) | 2019-01-04 | 2019-01-04 | Hot pneumatic forming device and forming system for curved glass |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920011088.5U CN209759292U (en) | 2019-01-04 | 2019-01-04 | Hot pneumatic forming device and forming system for curved glass |
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| CN209759292U true CN209759292U (en) | 2019-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836033A (en) * | 2019-01-04 | 2019-06-04 | 秦皇岛博硕光电设备股份有限公司 | Hot air forming method, hot gas move molding machine and hot gas moves formation system |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109836033A (en) * | 2019-01-04 | 2019-06-04 | 秦皇岛博硕光电设备股份有限公司 | Hot air forming method, hot gas move molding machine and hot gas moves formation system |
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