Alkali-free amber glass easy to blow‑mold, and molding device
By using an alkali-free amber glass formula and automated blowing equipment, the problems of glass bottle material stability and forming efficiency have been solved, enabling low-cost and high-efficiency glass bottle production.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- CNBM RESEARCH INSTITUTE FOR ADVANCED GLASS MATERIALS GROUP CO LTD
- Filing Date
- 2025-08-01
- Publication Date
- 2026-07-02
AI Technical Summary
Existing glass bottle materials have poor chemical stability, making it difficult to manufacture large-size glass bottles. Furthermore, the blowing equipment is costly, cumbersome to operate, and has a slow solidification process after molding.
Using an alkali-free amber glass formula, the molding temperature is reduced by controlling the redox atmosphere and Fe2O3 and TiO2 coloring in the melting furnace, and the glass is blown using automated blowing equipment, combined with annealing treatment.
Lowering the molding temperature improves the chemical stability of the glass, simplifies the operation, reduces production costs, and improves molding efficiency and quality.
Smart Images
Figure CN2025112182_02072026_PF_FP_ABST
Abstract
Description
An easy-to-blow alkali-free amber glass and its forming equipment Technical Field
[0001] This invention belongs to the field of alkali-free amber glass technology, specifically an alkali-free amber glass that is easy to blow into shape and forming equipment. Background Technology
[0002] Glass bottles, as everyday consumer goods, are widely used in beer, beverages, and pharmaceuticals. Their forming methods are mainly divided into stretching and blowing. Stretching is suitable for small-volume bottles, where softened glass is mechanically stretched into a tube and then cut and sealed. Blowing is suitable for large-sized bottles, where air is blown into the softened glass, shaping it in a mold. Blowing is further divided into blow-blow and press-blow methods; the former is used for narrow-mouth bottles, and the latter for wide-mouth bottles. Glass bottle production first requires heating the batch material into a uniform, bubble-free molten glass in a high-temperature tank furnace or bath furnace. Subsequently, the molten glass flows into the mold through a feed channel at 1000℃-1200℃ for shaping. The composition of the glass and its viscosity changes within the forming temperature range are crucial to the forming quality.
[0003] Currently, commonly used glass bottle materials are soda-lime glass or low-borosilicate glass. While easy to mold, they have poor chemical stability and are unsuitable for storing high-end pharmaceuticals and chemical reagents because alkali metal ions readily react with the reagents, causing contamination. Medium-borosilicate glass and high-borosilicate glass, with their high chemical stability, are difficult to manufacture large-size glass bottles due to their high molding temperature and viscosity. Furthermore, existing glass blowing equipment is quite expensive. For example, a glass bottle forming processing equipment and method (publication number CN118388115A) requires a driver for each mold to open and close, making operation cumbersome. Additionally, no cooling measures are taken after glass forming, resulting in very slow solidification of the glass bottle solution. Summary of the Invention
[0004] To address the problems mentioned in the background art, the present invention provides an alkali-free amber glass that is easy to blow into shape and a forming device thereof.
[0005] The objective of this invention can be achieved through the following technical solutions:
[0006] An alkali-free amber glass that is easy to blow into shape and its forming equipment are manufactured through the following steps:
[0007] S1. Weigh and mix the alkali-free amber glass raw materials in a specific ratio, and add the colorant and stir evenly.
[0008] S2. The mixed raw materials are fed into a glass melting furnace and melted at a high temperature of over 1400℃. During the melting process, the coloring effect of Fe2O3 and TiO2 is controlled by adjusting the redox atmosphere in the melting furnace and utilizing the reducing properties of C to obtain the desired amber color.
[0009] S3. The molten glass flows into the droplet before the forming mold through the feeding channel. The temperature of the molten glass should be controlled within a suitable range for blowing. The glass is then blown into the desired shape using a blowing molding machine.
[0010] S4. The formed glass needs to undergo annealing to eliminate internal stress and prevent cracking.
[0011] As a further preferred embodiment of this technical solution: the alkali-free amber glass raw material is composed of the following components by mass percentage: 55%-60% SiO2, 0.1%-5% Al2O3, 0.1%-5% B2O3, 5%-20% CaO, 5%-20% BaO, 5%-20% ZnO, 0.1%-1.5% Fe2O3, 0.5%-3.5% TiO2, 0.1%-3% C, and 0.1%-3% X2O3;
[0012] The total mass percentage of SiO2+Al2O3 is 58%-65%, the total mass percentage of CaO+BaO+ZnO is 26%-32.5%, and the ratio of (CaO+BaO) / ZnO is 2.5-6, while the ratio of X2O3 / TiO2 is 0.1-7.5.
[0013] As a further preferred embodiment of this technical solution: the SiO2 is introduced from low-iron silica sand, with Fe2O3 ≤ 0.008wt%, and the particle size range is: +0.6mm ≤ 1%, 0.6mm-0.425mm < 9.8%, 0.425mm-0.1mm ≥ 85%, -0.1mm < 5%, and the moisture content is 2%-5%.
[0014] As a further preferred embodiment of this technical solution: the X2O3 is one or more of Bi2O3, La2O3, and Y2O3.
[0015] As a further preferred embodiment of this technical solution: the blow forming equipment described in step S3 includes a worktable and a blow forming assembly detachably mounted on the worktable via a third fixing frame, and also includes...
[0016] An intermittent feeding mechanism is located at the lower end of the worktable and is used to drive the rotary table located at the upper end of the intermittent feeding mechanism to rotate intermittently to feed materials.
[0017] A clamping mechanism is located above the worktable and is used to drive two cooperating molding dies to close. The clamping mechanism includes an automatic reset component for automatic mold opening.
[0018] As a further preferred embodiment of this technical solution: the clamping mechanism further includes a fixed shaft and an annular support frame disposed on the fixed shaft. The annular support frame is provided with a plurality of slide rails arranged in an annular array. A first slider is slidably connected to the inner side of each slide rail. A connecting shaft is provided at the upper end of the first slider. A first connecting rod and a second connecting rod are rotatably connected to the upper end of the connecting shaft. The first connecting rod and the second connecting rod are staggered and rotatably connected. A second slider is fixedly connected to the upper end of each first connecting rod and the second connecting rod.
[0019] As a further preferred embodiment of this technical solution: the automatic reset assembly includes a fixed seat mounted on a slide rail, and a second rotating shaft rotatably connected to the fixed seat. A limit plate is fixedly connected to the second rotating shaft. A limit block with an inclined bottom surface is provided at the lower end of the limit plate. A limit groove that cooperates with the limit block is provided on the first slider. A second reset spring for resetting the first slider is provided on the slide rail. A triangular block with an inclined top surface is provided at the upper end of the limit plate. A first reset spring is fixedly connected to the lower end of the limit plate. The end of the first reset spring away from the limit plate is fixedly connected to the slide rail.
[0020] The automatic reset assembly also includes a first fixing frame fixedly connected to the workbench, and the first fixing frame is provided with a baffle that works in conjunction with the triangular block and is arranged at an angle.
[0021] As a further preferred embodiment of this technical solution: the clamping mechanism further includes a fixing block disposed on the upper surface of the workbench, a cylinder is detachably mounted on the fixing block, and a push block is fixedly connected to the output end of the cylinder and arranged in close contact with the annular support frame or the first slider, and the side of the push block close to the annular support frame or the first slider is an arc surface.
[0022] As a further preferred embodiment of this technical solution: the intermittent feeding mechanism includes a drive shaft rotatably connected to the lower end of the worktable, and a rotating disk fixedly mounted on the drive shaft. A connecting frame is rotatably connected to the lower end of the rotating disk, and a grooved wheel is rotatably connected to the end of the connecting frame away from the rotating disk. A lever for rotating the grooved wheel is eccentrically provided on the rotating disk. An incomplete disk that can cooperate with the grooved wheel is also provided on the rotating disk. The grooved wheel is provided with a first rotating shaft rotatably connected to the worktable, and a rotating platform is fixedly connected to the upper end of the first rotating shaft. A sliding groove for sliding multiple second sliders is provided on the rotating platform.
[0023] It also includes a drive mechanism for driving the drive shaft to rotate.
[0024] As a further preferred embodiment of this technical solution: the workbench is fixedly connected to a second fixing frame, and a fan for blowing air for cooling is detachably installed on the second fixing frame.
[0025] Compared with the prior art, the beneficial effects of the present invention are:
[0026] 1. In this invention, the forming temperature of amber glass is reduced, ensuring that the glass material properties are easy to form by blowing, reducing the difficulty of the blowing process, and at the same time greatly improving the chemical stability of the glass.
[0027] 2. In this invention, multiple sets of molding dies can be closed by only one drive cylinder, which greatly reduces production costs compared to the traditional method of multiple sets of molding dies requiring multiple drives.
[0028] 3. In this invention, after the alkali-free amber glass is blown into shape, the mold can be opened automatically without human intervention or system control, making the operation simple.
[0029] 4. In this invention, after the alkali-free amber glass is blown into shape, the solidification time of the blown alkali-free amber glass is reduced by blowing air through a fan, thereby improving the quality of the blown alkali-free amber glass. Attached Figure Description
[0030] Figure 1 is a three-dimensional structural diagram of the blow molding equipment;
[0031] Figure 2 is a partial three-dimensional structural schematic diagram of Figure 1;
[0032] Figure 3 is a partial three-dimensional structural schematic diagram of Figure 1 (II).
[0033] Figure 4 is an enlarged view of point A in Figure 1;
[0034] Figure 5 is an enlarged view of point B in Figure 3;
[0035] Figure 6 is an enlarged view of point C in Figure 2;
[0036] Figure 7 is a partial three-dimensional structural schematic diagram of the present invention.
[0037] Legend: 1. Workbench; 2. Intermittent feeding mechanism; 21. Drive shaft; 22. Rotating disc; 23. Incomplete disc; 24. Lever; 25. Connecting frame; 26. Grooved wheel; 27. Rotating shaft No. 1; 3. Clamping mechanism; 31. Fixed shaft; 32. Annular support frame; 33. Slide rail; 34. Sliding block No. 1; 341. Limiting groove; 35. Automatic reset assembly; 351. Fixed seat; 352. Rotating shaft No. 2; 353. Limiting plate; 35 4. Limiting block; 355. No. 1 return spring; 356. No. 1 fixing frame; 357. Baffle; 358. Triangular block; 359. No. 2 return spring; 36. Connecting shaft; 37. No. 1 connecting rod; 38. No. 2 connecting rod; 39. No. 2 slider; 310. Fixing block; 311. Cylinder; 312. Push block; 4. Forming mold; 5. Rotating table; 51. Slide groove; 6. No. 2 fixing frame; 7. Fan; 8. No. 3 fixing frame; 9. Blowing assembly. Detailed Implementation
[0038] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0039] An easy-to-blow, alkali-free amber glass and its forming equipment are manufactured through the following steps:
[0040] S1. Weigh and mix the alkali-free amber glass raw materials in a specific ratio, and add the colorant and stir evenly.
[0041] S2. The mixed raw materials are fed into a glass melting furnace and melted at a high temperature of over 1400℃. During the melting process, the coloring effect of Fe2O3 and TiO2 is controlled by adjusting the redox atmosphere in the melting furnace and utilizing the reducing properties of C to obtain the desired amber color.
[0042] S3. The molten glass flows into the droplet before the forming mold through the feeding channel. The temperature of the molten glass should be controlled within a suitable range for blowing. The glass is then blown into the desired shape using a blowing molding machine.
[0043] S4. The formed glass needs to be annealed to eliminate internal stress and prevent cracking.
[0044] The raw material for alkali-free amber glass comprises, by mass percentage: 55%-60% SiO2, 0.1%-5% Al2O3, 0.1%-5% B2O3, 5%-20% CaO, 5%-20% BaO, 5%-20% ZnO, 0.1%-1.5% Fe2O3, 0.5%-3.5% TiO2, 0.1%-3% C, and 0.1%-3% X2O3; wherein the total mass percentage of SiO2 + Al2O3 is 58%-65%. It should be noted that SiO2 is the glass-forming agent, constituting the glass framework, while Al2O3 is an intermediate component. Removing oxides and controlling the total mass percentage of SiO2 + Al2O3 to 58-65% helps enhance the density of the glass network structure, improves its chemical stability, and prevents excessive viscosity, which is beneficial for blow forming. B2O3 can reduce the brittleness of the glass and improve its chemical stability. B2O3 is also a good fluxing agent, significantly lowering the glass melting temperature and aiding the vitrification process. The total mass percentage of CaO + BaO + ZnO is 26%-32.5%, and the (CaO + BaO) / ZnO ratio is 2.5-6. It should be noted that the glass does not contain alkali metal oxides, which creates significant challenges for melting and forming. This presents significant challenges. To address this, the content of alkaline earth metal oxides was increased, resulting in a mixture containing CaO and BaO components. This significantly lowers the glass liquidus temperature, improving melting performance and promoting forming. Too low a total amount leads to insufficient effectiveness, while too high a amount causes crystallization. Simultaneously, the addition of ZnO improves melting performance. ZnO has a tetrahedral structure and good thermal conductivity, improving the melting quality, homogeneity, chemical stability, and thermal stability of the glass. However, ZnO is a low-element component, so its proportion needs to be limited to achieve an optimal ratio, avoiding an excessively large tetrahedral structure that results in insufficient filling material. Insufficient filler content leads to problems such as insufficient glass hardness. Therefore, the (CaO+BaO) / ZnO ratio is controlled at 2.5-6, and the X2O3 / TiO2 ratio is controlled at 0.1-7.5, with X2O3 being one or more of Bi2O3, La2O3, and Y2O3. Iron-titanium coloring is used to achieve the amber color of the glass. However, the introduction of TiO2 and excessive alkaline earth metal content both cause crystallization in the glass. Therefore, one or more of Bi2O3, La2O3, and Y2O3 are introduced, and the X2O3 / TiO2 ratio is limited to 0.5-6.5 to improve the anti-crystallization performance and chemical stability of the glass and prevent crystallization. It should be noted that...
[0045] The SiO2 is introduced from low-iron silica sand, with Fe2O3 ≤ 0.008 wt%. The particle size range is: +0.6 mm ≤ 1%, 0.6 mm - 0.425 mm < 9.8%, 0.425 mm - 0.1 mm ≥ 85%, -0.1 mm < 5%, and the moisture content is 2% - 5%. The particle size range is designed to facilitate the melting of the glass and provide a good foundation for shaping; the moisture content is used to provide a suitable redox atmosphere, which is beneficial for glass coloring. To improve color uniformity, the working temperature (Tw) of amber glass with a viscosity of 103 Pa·s is ≤1005℃, the flame processing temperature (T2) of amber glass with a viscosity of 102 Pa·s is ≤1170℃, and the polishing temperature range ΔT of amber glass with a viscosity of 102.7-3.2 Pa·s is 47℃-74℃. This is achieved by controlling the proportion of alkaline earth metal oxides and introducing Bi2O3, La2O3, and Y2O3 to reduce the temperature range (T) of the blow forming process. w T2), while controlling the polishing temperature range between 47-74℃, because if the glass material is too long, the glass bottle will not be able to be formed, and if the glass material is too short, the hardening will be too fast, causing the glass bottle to have breaks, cracks, etc. The amber glass has a thickness of 4mm, Y of 17-29%, λd of 581~586, Pe>90%, and the alkali leaching of the amber glass is ≤0.08mL;
[0046] Amber-colored glass was prepared according to this composition. The components and properties of the glass samples obtained in Examples 1 to 6 and Comparative Examples 1 to 2 are shown in Table 1. The high-temperature viscosity was tested using a rotational high-temperature viscometer according to ASTM C-965, and the alkali leaching was tested according to the particle method standard in GB / T 4771-2015, as follows:
[0047] Table 1. Components and properties of Examples 1-6 and Comparative Examples 1-2
[0048] In summary, Examples 1 to 8, Comparative Examples 1 and 2 show that the glass has a Y content of 17-29% and a λ content of... d The viscosity ranges from 581 to 586, with Pe > 90%, and the coloring is amber. Its viscosity characteristic point T... w The viscosity characteristics and chemical stability of the amber glass of this invention are as follows: ≤1005℃, T2≤1170℃, ΔT is 47-74℃, and alkali leaching is ≤0.08mL. In contrast, Comparative Example 1 did not introduce Bi2O3, La2O3, and Y2O3, and Comparative Example 2 did not control the composition and proportion of alkaline earth metal oxides. Both of them are worse than the comparative examples in terms of viscosity characteristics and chemical stability. It can be seen that the amber glass of this invention reduces the forming temperature, ensures that the glass material properties are easy to form by blowing, reduces the difficulty of the blowing process, and greatly improves the chemical stability of the glass.
[0049] Example 7:
[0050] Based on the above embodiments, as shown in Figures 1-7, the blow molding equipment in step S3 includes a worktable 1 and a blow molding assembly 9 detachably mounted on the worktable 1 via a third fixing frame 8. It also includes an intermittent feeding mechanism 2, located at the lower end of the worktable 1, for driving the rotating table 5 located at the upper end of the intermittent feeding mechanism 2 to rotate intermittently for feeding; and a clamping mechanism 3, located above the worktable 1, for driving the two mutually cooperating molding dies 4 to close, and the clamping mechanism 3 includes an automatic reset assembly 35 for automatic mold opening.
[0051] The clamping mechanism 3 also includes a fixed shaft 31 and an annular support frame 32 mounted on the fixed shaft 31. The fixed shaft 31 is fixedly mounted on a first rotating shaft 27. The annular support frame 32 is provided with multiple slide rails 33 arranged in an annular array. Each slide rail 33 has a first slider 34 slidably connected to its inner side. A connecting shaft 36 is provided at the upper end of the first slider 34. A first connecting rod 37 and a second connecting rod 38 are rotatably connected to the upper end of the connecting shaft 36. The first connecting rod 37 and the second connecting rod 38 are staggered and rotatably connected. Each first connecting rod... A second slider 39 is fixedly connected to the upper end of both 37 and the second connecting rod 38. A forming mold 4 is fixedly connected to the upper end of the second slider 39, and the forming molds 4 that cooperate with each other are arranged symmetrically. The clamping mechanism 3 also includes a fixing block 310 set on the upper surface of the worktable 1. A cylinder 311 is detachably installed on the fixing block 310. A push block 312 is fixedly connected to the output end of the cylinder 311 and is arranged in close contact with the annular support frame 32 or the first slider 34. The side of the push block 312 that is close to the annular support frame 32 or the first slider 34 is an arc surface.
[0052] Specifically, firstly, molten glass is added to the two forming molds 4 directly above the cylinder 311. During this process, the cylinder 311 is activated to drive the pusher block 312 to push the first slider 34 to slide inside the slide rail 33. The first slider 34 drives the connecting shaft 36 on it to move, thereby causing the first connecting rod 37 and the second connecting rod 38 to rotate and the included angle to decrease. The first connecting rod 37 and the second connecting rod 38 respectively drive the second slider 39 on them to slide inside the corresponding slide groove 51. The second slider 39 on the first connecting rod 37 and the second connecting rod 38 move in opposite directions, thereby making the two cooperating forming molds 4 close together. Afterwards, the cylinder 311 is activated to drive the pusher block 312 to reset. Multiple sets of forming molds 4 can be closed with only one drive cylinder 311. Compared with the traditional method of multiple sets of forming molds 4 requiring multiple drives, the production cost is greatly reduced.
[0053] The automatic reset assembly 35 includes a fixed base 351 mounted on a slide rail 33, and a second rotating shaft 352 rotatably connected to the fixed base 351. A limit plate 353 is fixedly connected to the second rotating shaft 352. A limit block 354 with an inclined bottom surface is provided at the lower end of the limit plate 353. A limit groove 341 that cooperates with the limit block 354 is provided on the first slider 34. A second reset spring 359 for resetting the first slider 34 is provided on the slide rail 33. A triangular block 358 with an inclined top surface is provided at the upper end of the limit plate 353. A first reset spring 355 is fixedly connected to the lower end of the limit plate 353. The end of the first reset spring 355 away from the limit plate 353 is fixedly connected to the slide rail 33. The automatic reset assembly 35 also includes a first fixed frame 356 fixedly connected to the worktable 1. A baffle 357 that cooperates with the triangular block 358 and is arranged at an incline is provided on the first fixed frame 356.
[0054] Specifically, during the mold closing process of the two cooperating molding dies 4, that is, when the push block 312 pushes the first slider 34 to slide inside the slide rail 33, because the limiting block 354 below the limiting plate 353 is set at an angle, the first slider 34 will lift the limiting plate 353 near the end of the first slider 34 during its movement. Until the limiting block 354 moves directly above the limiting groove 341, under the action of the elastic force of the first return spring 355, the limiting block 354 is locked into the interior of the limiting groove 341. Thus, the material is fed until it passes through the blowing assembly 9. The blowing assembly 9 is existing technology and is only used for this purpose. During the blowing process of the blowing assembly 9, the two cooperating molding dies 4 always remain locked, which is the purpose of the blowing assembly. The blowing assembly 9 provides basic support for the glass material blowing and forming inside the two forming molds 4. After the blowing assembly 9 blows and forms the glass directly below it, the intermittent feeding mechanism 2 is activated again to drive the rotating table 5 and the forming mold 4 above the rotating table 5 to rotate. During the rotation, since there is an inclined triangular block 358 above the limiting plate 353, the triangular block 358 will contact the baffle 357 and press down the end of the limiting plate 353 away from the first slider 34, so that the limiting block 354 disengages from the inside of the limiting groove 341. Thus, after the blowing assembly 9 blows and forms the glass inside the two forming molds 4, the two forming molds 4 automatically open without manual or system control, which is simple to operate.
[0055] Example 8:
[0056] Based on Embodiment 7, the intermittent feeding mechanism 2 includes a drive shaft 21 rotatably connected to the lower end of the worktable 1, and a rotating disk 22 fixedly mounted on the drive shaft 21. A connecting frame 25 is rotatably connected to the lower end of the rotating disk 22, and a grooved wheel 26 is rotatably connected to the end of the connecting frame 25 away from the rotating disk 22. A lever 24 for turning the grooved wheel 26 is eccentrically provided on the rotating disk 22. An incomplete disk 23 that can cooperate with the grooved wheel 26 is also provided on the rotating disk 22. The grooved wheel 26 is provided with a first rotating shaft 27 rotatably connected to the worktable 1, and a rotating platform 5 is fixedly connected to the upper end of the first rotating shaft 27. A sliding groove 51 for sliding multiple second sliders 39 is provided on the rotating platform 5. The mechanism also includes a drive mechanism for driving the drive shaft 21 to rotate.
[0057] Specifically, the drive mechanism, specifically a rotary drive motor, drives the drive shaft 21 to rotate, which in turn drives the rotating disk 22 to rotate. The rotating disk 22 then drives the incomplete disk 23 and the lever 24 on it to rotate. The lever 24 can rotate the grooved wheel 26, which in turn drives the rotating table 5 on it to rotate. The rotation of the rotating table 5 moves the two forming molds 4, which have been filled with molten glass and are closed, to directly below the blowing assembly 9 for blowing and forming. After blowing and forming, the rotating table 5 rotates a quarter circle. The circumferential trajectory moves to directly below the fan 7, and then it can rotate another quarter circumferential trajectory. Since the grooved wheel 26 of this device is only provided with four grooves, for the sake of ease of description, it will be described according to the standard of four grooves. Then, the glass is transferred to the next process by the external robotic arm. It should be noted that the purpose of the incomplete disc 23 is to limit the rotation of the grooved wheel 26 when the lever 24 is disengaged from the grooved wheel 26, and to prevent the grooved wheel 26 from rotating on its own. The number of grooves on the grooved wheel 26 can be specifically set according to the number of forming molds 4 that cooperate with each other in pairs above.
[0058] Example 9:
[0059] Based on Embodiment 7, the workbench 1 is fixedly connected to a second fixing frame 6, and a fan 7 for blowing cooling is detachably installed on the second fixing frame 6.
[0060] Specifically, when the glass is blown and the two forming molds 4 are opened and moved directly below the fan 7, the two cooperating forming molds 4 are in the open state. The temperature of the glass is reduced by the air blown by the fan 7, so as to accelerate the solidification of the glass liquid and avoid the glass liquid from softening and affecting the quality of the glass.
[0061] The above embodiments are only used to illustrate the technical methods of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical methods of the present invention without departing from the spirit and scope of the technical methods of the present invention.
Claims
1. An alkali-free amber glass that is easy to blow into shape and forming equipment, characterized in that: It is made through the following steps: S1. Weigh and mix the alkali-free amber glass raw materials in a specific ratio, and add the colorant and stir evenly. S2. The mixed raw materials are fed into a glass melting furnace and melted at a high temperature of over 1400℃. During the melting process, the coloring effect of Fe2O3 and TiO2 is controlled by adjusting the redox atmosphere in the melting furnace and utilizing the reducing properties of C to obtain the desired amber color. S3. The molten glass flows into the droplet before the forming mold through the feeding channel. The temperature of the molten glass should be controlled within a suitable range for blowing. The glass is then blown into the desired shape using a blowing molding machine. S4. The formed glass needs to be annealed to eliminate internal stress and prevent cracking.
2. The alkali-free amber glass and forming equipment that are easy to blow into shape according to claim 1, characterized in that, The alkali-free amber glass raw material is composed of the following components by mass percentage: 55%-60% SiO2, 0.1%-5% Al2O3, 0.1%-5% B2O3, 5%-20% CaO, 5%-20% BaO, 5%-20% ZnO, 0.1%-1.5% Fe2O3, 0.5%-3.5% TiO2, 0.1%-3% C, and 0.1%-3% X2O3; The total mass percentage of SiO2+Al2O3 is 58%-65%, the total mass percentage of CaO+BaO+ZnO is 26%-32.5%, and the ratio of (CaO+BaO) / ZnO is 2.5-6, while the ratio of X2O3 / TiO2 is 0.1-7.
5.
3. The alkali-free amber glass and forming equipment that are easy to blow into shape according to claim 2, characterized in that, The SiO2 is introduced from low-iron silica sand, with Fe2O3 ≤ 0.008wt%, and particle size range: +0.6mm ≤ 1%, 0.6mm-0.425mm < 9.8%, 0.425mm-0.1mm ≥ 85%, -0.1mm < 5%, and moisture content of 2%-5%.
4. The alkali-free amber glass and forming equipment that are easy to blow into shape according to claim 3, characterized in that, The X2O3 mentioned is one or more of Bi2O3, La2O3, and Y2O3.
5. The alkali-free amber glass and forming equipment that are easy to blow into shape according to claim 4, characterized in that, The blow forming equipment described in step S3 includes a worktable (1) and a blow forming assembly (9) detachably mounted on the worktable (1) via a third fixing bracket (8), and also includes Intermittent feeding mechanism (2) is set at the lower end of the workbench (1) and is used to drive the rotating table (5) set at the upper end of the intermittent feeding mechanism (2) to rotate intermittently to feed materials; The clamping mechanism (3) is located above the workbench (1) and is used to drive the two cooperating molding dies (4) to close. The clamping mechanism (3) includes an automatic reset component (35) for automatic mold opening.
6. The alkali-free amber glass and forming equipment that are easy to blow into shape according to claim 5, characterized in that, The clamping mechanism (3) further includes a fixed shaft (31) and an annular support frame (32) set on the fixed shaft (31). The annular support frame (32) is provided with a plurality of slide rails (33) arranged in an annular array. Each slide rail (33) is slidably connected to a first slider (34) on its inner side. The first slider (34) is provided with a connecting shaft (36) at its upper end. The upper end of the connecting shaft (36) is rotatably connected to a first connecting rod (37) and a second connecting rod (38). The first connecting rod (37) and the second connecting rod (38) are staggered and rotatably connected. A second slider (39) is fixedly connected to the upper end of each first connecting rod (37) and the second connecting rod (38).
7. The alkali-free amber glass and forming equipment that are easy to blow into shape according to claim 6, characterized in that, The automatic reset assembly (35) includes a fixed seat (351) disposed on the slide rail (33) and a second rotating shaft (352) rotatably connected to the fixed seat (351). A limit plate (353) is fixedly connected to the second rotating shaft (352). A limit block (354) with an inclined bottom surface is provided at the lower end of the limit plate (353). A limit groove (341) that cooperates with the limit block (354) is provided on the first slider (34). A second reset spring (359) for resetting the first slider (34) is provided on the slide rail (33). A triangular block (358) with an inclined top surface is provided at the upper end of the limit plate (353). A first reset spring (355) is fixedly connected to the lower end of the limit plate (353). The end of the first reset spring (355) away from the limit plate (353) is fixedly connected to the slide rail (33). The automatic reset assembly (35) also includes a first fixing frame (356) fixedly connected to the workbench (1), and the first fixing frame (356) is provided with a baffle (357) that works in conjunction with the triangular block (358) and is arranged at an angle.
8. The alkali-free amber glass and forming equipment that are easy to blow into shape according to claim 7, characterized in that, The clamping mechanism (3) further includes a fixing block (310) disposed on the upper surface of the workbench (1). A cylinder (311) is detachably mounted on the fixing block (310). The output end of the cylinder (311) is fixedly connected to a push block (312) that fits against the annular support frame (32) or the first slider (34). The side of the push block (312) close to the annular support frame (32) or the first slider (34) is an arc surface.
9. The easily blown alkali-free amber glass and forming equipment according to claim 8, characterized in that, The intermittent feeding mechanism (2) includes a drive shaft (21) rotatably connected to the lower end of the worktable (1) and a rotating disk (22) fixedly installed on the drive shaft (21). A connecting frame (25) is rotatably connected to the lower end of the rotating disk (22). A grooved wheel (26) is rotatably connected to the end of the connecting frame (25) away from the rotating disk (22). A lever (24) for turning the grooved wheel (26) is eccentrically provided on the rotating disk (22). An incomplete disk (23) that can cooperate with the grooved wheel (26) is also provided on the rotating disk (22). A first rotating shaft (27) rotatably connected to the worktable (1) is provided on the grooved wheel (26). A rotating table (5) is fixedly connected to the upper end of the first rotating shaft (27). A sliding groove (51) for sliding multiple second sliders (39) is provided on the rotating table (5). It also includes a drive mechanism for driving the drive shaft (21) to rotate.
10. The easily blown alkali-free amber glass and forming equipment according to claim 9, characterized in that, The workbench (1) is fixedly connected to a second fixing frame (6), and a fan (7) for blowing air cooling is detachably installed on the second fixing frame (6).