A high-efficiency clarification treatment method for neutral borosilicate glass

Abstract

The present invention relates to an efficient clarification treatment method for neutral borosilicate glass, which comprises the following steps: step S1: preparing a composite glass clarifier; step S2: uniformly mixing the composite glass clarifier with glass raw materials to form a glass batch material, firing the glass batch material at high temperature, clarifying and homogenizing the glass batch material to obtain a neutral borosilicate glass liquid; step S3: slowly flowing the neutral borosilicate glass liquid into a pressure treatment device, applying a certain pressure to the glass liquid through the pressure treatment device to break the residual bubbles in the glass liquid; step S4: annealing and molding the glass liquid flowing out of the pressure treatment device. The composite glass clarifier of the present invention can effectively reduce the influence of bubbles in the glass, and the pressure treatment device can break the residual bubbles in the glass liquid, effectively reduce the number of bubbles in the medium borosilicate glass, reduce the size of the bubbles, facilitate the discharge of bubbles in the glass and the absorption of bubbles by the glass liquid, and significantly improve the clarification effect of the glass.

Description

Technical Field

[0001] The invention belongs to the technical field of glass clarification, and in particular relates to a high-efficiency clarification treatment method for neutral borosilicate glass. Background Art

[0002] In recent years, with the rapid development of my country's pharmaceutical industry, pharmaceutical glass has become an irreplaceable packaging material for many pharmaceutical products and biological preparations due to its many excellent properties, such as transparency, glossiness, barrier properties, chemical stability, temperature resistance, light shielding, compatibility, and regeneration. It is widely used in the packaging of vaccines, high-end infusions, antibiotics, general powders, freeze-dried products, blood, biological preparations and other medicines.

[0003] Pharmaceutical glass can be divided into soda-lime glass and borosilicate glass according to its composition. 2 O 3 Neutral borosilicate glass, also commonly known as neutral pharmaceutical glass internationally, is recognized as a safe packaging material.

[0004] Bubbles are a common defect in the glass melting process. The presence of bubbles will greatly affect its uniformity, thermal stability, mechanical properties and light transmittance. The clarification process is the process of expelling visible bubbles. Neutral medical glass has a high bubble melting ratio, a large number of bubbles, a slow bubble rising rate, and is relatively difficult to clarify, which greatly affects its use effect. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides an efficient clarification treatment method for neutral borosilicate glass. The specific technical scheme is as follows:

[0006] The present invention provides a method for efficiently clarifying neutral borosilicate glass, the method comprising the following steps:

[0007] Step S1: preparing a composite glass clarifier;

[0008] Step S2: uniformly mixing the composite glass clarifier and glass raw materials to form a glass batch material, firing the glass batch material at a high temperature, clarifying and homogenizing the glass batch material to obtain a neutral borosilicate glass liquid;

[0009] Step S3: slowly flowing the neutral borosilicate glass liquid into a pressure treatment device, and applying a certain pressure to the glass liquid by the pressure treatment device to break the residual bubbles in the glass liquid;

[0010] Step S4: performing annealing and molding treatment on the glass liquid flowing out of the above-mentioned pressure treatment device.

[0011] As a preferred technical solution of the present invention, in step S1, the composite glass clarifier is composed of the following raw materials in parts by weight: 60-70 parts of NaCl, CaSO4 10-20 parts NaNO 3 10-20 servings.

[0012] As a preferred technical solution of the present invention, the NaCl, CaSO 4 、NaNO 3 All of them are solid powders, and the composite glass clarifier is prepared by uniformly mixing these three components according to a proportion.

[0013] As a preferred technical solution of the present invention, based on the total mass of the neutral borosilicate glass, the neutral borosilicate glass contains 70-75% SiO 2 、5-10%Al 2 O 3 8-12% B 2 O 3 、6-8%Na 2 O, 0.5-2% ZnO, 0.02-0.2% ZrO 2 , 0.1-2.0% TiO 2 And 0.2-0.5% composite glass clarifier.

[0014] As a preferred technical solution of the present invention, in step S2, the glass batch material is fired in a high-temperature furnace at 1550-1600°C, kept warm for 2-3 hours, and flows into the clarification zone and the homogenization zone.

[0015] As a preferred technical solution of the present invention, in step S4, the annealing and molding treatment temperature of the glass liquid is 500-600°C.

[0016] As a preferred technical solution of the present invention, in step S3, the pressurized treatment device includes a liquid containing barrel, a liquid inlet pipe is opened in the middle and upper part of the liquid containing barrel, a connecting pipe is opened at the bottom of the liquid containing barrel, and a first valve is arranged on the connecting pipe; a pressure plate is plugged into the axial gap in the liquid containing barrel, and an electric heating layer is embedded in the pressure plate and the inner wall of the liquid containing barrel; the pressure plate is driven by a telescopic mechanism arranged on the top surface of the liquid containing barrel to realize lifting and lowering displacement; an air outlet pipe is opened on the top surface of the liquid containing barrel, and a second valve is arranged on the air outlet pipe.

[0017] As a preferred technical solution of the present invention, the telescopic mechanism includes a pressure rod, the vertical gap of the pressure rod passes through the middle of the top surface of the liquid-containing barrel, and the bottom end of the pressure rod is vertically fixedly connected to the pressure plate; guide support grooves are vertically symmetrically arranged around the pressure rod on the top surface of the liquid-containing barrel; the top of the pressure rod is vertically connected to a guide plate, and the ends of the guide plate are respectively connected to the corresponding guide support grooves in a longitudinal sliding manner; a transmission screw is horizontally rotated between the tops of the two guide support grooves, and a separation ring is axially sleeved in the middle of the transmission screw, and the transmission screws located on both sides of the separation ring are respectively Opposite threads are arranged axially, and sliders are axially screwed together on the transmission screw along both sides of the dividing ring; rectangular blocks are vertically symmetrically connected to the middle part of the top surface of the guide plate along its long side direction, and the ends of the rectangular blocks are respectively connected to the corresponding ends of the sliders on the same side through connecting rod pivots; a first gear is axially connected to one end of the transmission screw, and a servo motor is horizontally arranged below the first gear through a suspension plate vertically connected to the corresponding guide support groove, and a second gear is axially connected to the power output end of the servo motor, and the second gear is meshed with the first gear.

[0018] As a preferred technical solution of the present invention, the outer diameter of the second gear is smaller than the outer diameter of the first gear.

[0019] As a preferred technical solution of the present invention, when the pressure plate applies pressure to the glass liquid in the liquid containing barrel, the first valve of the connecting pipe is in a closed state; after the pressurization is completed, the first valve is opened, and the glass liquid in the liquid containing barrel flows into the annealing molding area along the connecting pipe.

[0020] The beneficial effects of the present invention are:

[0021] The present invention adopts a composite glass clarifier combined with a pressure treatment device to prepare neutral borosilicate glass. The composite glass clarifier can effectively reduce the influence of bubbles in the glass. The pressure treatment device can break the residual bubbles in the glass liquid, thereby destroying the bubbles in the glass, effectively reducing the number of bubbles in the medium borosilicate glass and reducing the size of the bubbles, which is beneficial to the discharge of bubbles in the glass and the absorption of bubbles by the glass liquid, and significantly improving the clarification effect of the glass. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A flow chart showing an efficient clarification treatment method for neutral borosilicate glass of the present invention;

[0023] Figure 2 The high temperature observation image of glass liquid at 1600°C is shown;

[0024] Figure 3 A schematic diagram of the three-dimensional structure of the pressure treatment device in the present invention is shown;

[0025] Figure 4 A schematic diagram showing the structure of the telescopic mechanism of the pressure treatment device of the present invention is shown;

[0026] Figure 5 A structural cross-sectional view of the pressure treatment device in the present invention is shown.

[0027] As shown in the figure: 1. liquid container; 2. liquid inlet pipe; 3. connecting pipe; 31. first valve; 4. pressure plate; 5. telescopic mechanism; 51. pressure rod; 52. guide support groove; 53. guide plate; 531. rectangular block; 54. transmission screw; 541. separation ring; 55. slider; 56. connecting rod; 57. first gear; 58. servo motor; 581. suspension plate; 59. second gear; 6. outlet pipe; 61. second valve; 7. electric heating layer. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] In order to solve the technical problems in the background technology, a specific implementation method of an efficient clarification treatment method for neutral borosilicate glass is provided as follows:

[0030] Combination Figure 1 and Figure 2 As shown, a method for efficiently clarifying neutral borosilicate glass comprises the following steps:

[0031] Step S1: preparing a composite glass clarifier;

[0032] Step S2: uniformly mixing the composite glass clarifier and glass raw materials to form a glass batch material, firing the glass batch material at a high temperature, clarifying and homogenizing the glass batch material to obtain a neutral borosilicate glass liquid;

[0033] Step S3: slowly flowing the neutral borosilicate glass liquid into a pressure treatment device, and applying a certain pressure to the glass liquid by the pressure treatment device to break the residual bubbles in the glass liquid;

[0034] Step S4: performing annealing and molding treatment on the glass liquid flowing out of the above-mentioned pressure treatment device.

[0035] Preferably, in step S1, the composite glass clarifier is composed of the following raw materials in parts by weight: 60-70 parts of NaCl, CaSO 4 10-20 parts NaNO 3 10-20 servings.

[0036] Preferably, the NaCl, CaSO 4 、NaNO 3 All of them are solid powders, and the composite glass clarifier is prepared by uniformly mixing these three components according to a proportion.

[0037] Preferably, based on the total mass of the neutral borosilicate glass, the neutral borosilicate glass contains 70-75% SiO2, 5-10% Al2O3, 8-12% B2O3, 6-8% Na2O, 0.5-2% ZnO, 0.02-0.2% ZrO2, 0.1-2.0% TiO2 and 0.2-0.5% composite glass clarifier.

[0038] Preferably, in step S2, the glass batch material is fired in a high temperature furnace at 1550-1600°C, kept at this temperature for 2-3 hours, and then flows into the clarification zone and the homogenization zone.

[0039] Preferably, in step S4, the annealing temperature of the glass liquid is 500-600°C.

[0040] By adopting the above technical scheme, the present invention adopts a composite glass clarifier in combination with a pressure treatment device to prepare neutral borosilicate glass. The composite glass clarifier can effectively reduce the influence of bubbles in the glass. The pressure treatment device can break the residual bubbles in the glass liquid, thereby destroying the bubbles in the glass, effectively reducing the number of bubbles in the medium borosilicate glass and reducing the size of the bubbles, which is beneficial to the discharge of bubbles in the glass and the absorption of bubbles by the glass liquid, and significantly improving the clarification effect of the glass.

[0041] Among them, due to the high melting point of neutral borosilicate glass and the high viscosity of glass liquid, NaCl-CaSO 4 -NaNO 3 The composite glass clarifier has a better clarification effect; NaNO 3 Decomposes to form Na at above 700℃ 2 O, O 2 、N 2 etc., among which Na + Can effectively reduce the viscosity of glass liquid, O 2 、N 2 Gases such as NaCl can increase the volume of bubbles in the glass liquid, making it easier for the bubbles to be discharged; NaCl is a high-temperature volatile clarifier that will volatilize at 1400°C and diffuse from the glass liquid into the surrounding bubbles, increasing the volume of the bubbles and causing them to rise and escape; CaSO 4 It will decompose completely at 1350-1400℃, releasing O 2 and SO 2 Gas has a clarifying effect; compared with other clarifiers, NaCl-CaSO 4 -NaNO3 The three composite glass clarifiers work synergistically to remove most of the bubbles in the glass liquid. The pressure treatment device can dissolve the remaining smaller bubbles through high pressure. The combination of the two methods not only improves the bubble discharge efficiency, but also greatly prolongs the clarification temperature and clarification time in the neutral borosilicate glass melting process, making the clarification effect better.

[0042] Combination Figure 3 and Figure 5 As shown, in step S3, the pressurized treatment device includes a liquid containing barrel 1, a liquid inlet pipe 2 is opened in the middle and upper part of the liquid containing barrel 1, a connecting pipe 3 is opened at the bottom of the liquid containing barrel 1, and a first valve 31 is arranged on the connecting pipe 3; a pressure plate 4 is plugged and matched in the axial gap in the liquid containing barrel 1, and the pressure plate 4 and the inner wall of the liquid containing barrel 1 are both embedded with an electric heating layer 7; the pressure plate 4 is driven by a telescopic mechanism 5 arranged on the top surface of the liquid containing barrel 1 to realize lifting and lowering displacement; an air outlet pipe 6 is opened on the top surface of the liquid containing barrel 1, and a second valve 61 is arranged on the air outlet pipe 6.

[0043] By adopting the above technical scheme, in the set pressure treatment device, the glass liquid slowly flows into the liquid barrel 1 through the liquid inlet pipe 2, and the pressure plate 4 drives the glass liquid in the liquid barrel 1 through the telescopic mechanism 5 to apply critical pressure to the glass liquid, so that the residual bubbles in the glass liquid are broken; the set gas outlet pipe 6 can be used to discharge the gas in the liquid barrel 1 during pressurization; the connecting pipe 3 with the first valve 31 can control the outflow of the glass liquid in the liquid barrel 1; the pressure plate 4 and the inner wall of the liquid barrel 1 are both embedded with an electric heating layer 7, so that the temperature in the glass liquid can be uniform. The pressure treatment device is reasonably designed, which can effectively promote the breakage of residual bubbles in the glass liquid and better improve the clarification effect of neutral borosilicate glass.

[0044] Combination Figures 3 to 5As shown, the telescopic mechanism 5 includes a pressure rod 51, the vertical gap of the pressure rod 51 passes through the middle of the top surface of the liquid-containing barrel 1, and the bottom end of the pressure rod 51 is vertically fixedly connected to the pressure plate 4; guide support grooves 52 are vertically symmetrically arranged around the pressure rod 51 on the top surface of the liquid-containing barrel 1; a guide plate 53 is vertically connected to the top of the pressure rod 51, and the ends of the guide plate 53 are respectively connected with the corresponding guide support grooves 52 in longitudinal sliding cooperation; a transmission screw 54 is horizontally rotated between the tops of the two guide support grooves 52, and a separation ring 541 is axially sleeved in the middle of the transmission screw 54, and opposite screws are axially arranged on the transmission screw 54 on both sides of the separation ring 541. The guide plate 53 has a plurality of grooves (not shown in the figure), and the transmission screw 54 is axially threaded with sliders 55 along both sides of the separation ring 541; the middle part of the top surface of the guide plate 53 is vertically symmetrically connected with rectangular blocks 531 along its long side direction, and the ends of the rectangular blocks 531 are pivotally connected to the ends of the sliders 55 corresponding to the same sides thereof through connecting rods 56; one end of the transmission screw 54 is axially connected to a first gear 57, and a servo motor 58 is laterally arranged below the first gear 57 through a suspension plate 581 vertically connected to the corresponding guide support groove 52, and a second gear 59 is axially connected to the power output end of the servo motor 58, and the second gear 59 is meshingly connected to the first gear 57.

[0045] By adopting the above technical solution, the servo motor 58 in the telescopic mechanism 5 drives the second gear 59 to rotate, the second gear 59 drives the first gear 57 to rotate synchronously, the first gear 57 drives the transmission screw 54 to rotate, and the sliders 55 on both sides of the separation ring 541 move toward or oppositely under the drive of the transmission screw 54; wherein, when moving toward each other, the slider 55 presses down the guide plate 53 through the connecting rod 56, and the guide plate 53 moves downward along the guide support grooves 52 on both sides, and applies a downward thrust to the pressure plate 4 through the pressure rod 51, thereby applying a certain pressure to the glass liquid in the liquid barrel 1, causing the residual bubbles in the glass liquid to break. Compared with the cylinder or oil cylinder drive, the telescopic mechanism 5 has better controllability, and it is not easy for the glass liquid in the liquid barrel 1 to spill onto the pressure plate 4; the telescopic mechanism 5 adopts the servo motor 58, the transmission screw 54 and the double connecting rod 56 to cooperate with each other, which can apply a uniform push-pull force to the pressure plate 4, and can better complete the continuous pressurization operation in the liquid barrel 1.

[0046] Combination Figure 4 As shown, the outer diameter of the second gear 59 is smaller than the outer diameter of the first gear 57 .

[0047] By adopting the above technical solution, a deceleration effect can be achieved, and the pressure plate 4 can be pushed better.

[0048] Combination Figure 5As shown, when the pressure plate 4 applies pressure to the glass liquid in the liquid containing barrel 1, the first valve 31 of the connecting pipe 3 is in a closed state; after the pressurization is completed, the first valve 31 is opened, and the glass liquid in the liquid containing barrel 1 flows into the annealing molding area along the connecting pipe 3.

[0049] By adopting the above technical solution, the pressurization or outflow of the glass liquid in the liquid containing barrel 1 is more convenient.

[0050] Embodiment 1

[0051] like Figure 1 and 2 As shown, based on the above specific implementation manner, this embodiment further provides the following contents:

[0052] A method for efficiently clarifying neutral borosilicate glass containing 75% SiO 2 , 5% Al 2 O 3 10% B 2 O 3 、6%Na 2 O, 1.6% ZnO, 0.18% ZrO 2 , 2.02%TiO 2 , 0.2% composite glass clarifier; placing the evenly mixed glass batch materials in a high-temperature furnace at 1600℃, melting them at high temperature into glass liquid, and flowing them into the clarification zone and the homogenization zone; then slowly flowing the glass liquid into the liquid containing barrel 1 of the pressure treatment device through the liquid inlet pipe 2, applying a certain pressure to the glass liquid through the telescopic mechanism 5 and the pressure plate 4 to break the bubbles, opening the first valve 31, allowing the glass liquid to flow into the annealing and molding zone along the connecting pipe 3, and finally annealing and molding at 550℃.

[0053] The composite glass clarifier includes 60% NaCl and 20% CaSO 4 , 20% NaNO 3 .

[0054] Embodiment 2

[0055] like Figure 1 and 2 As shown, based on the above specific implementation manner, this embodiment further provides the following contents:

[0056] A method for efficiently clarifying neutral borosilicate glass containing 70% SiO2 and 8% Al 2 O 3 10% B 2 O 3 , 8%Na 2 O, 1.5% ZnO, 0.15% ZrO2 , 2.05%TiO 2 , 0.3% composite glass clarifier; placing the evenly mixed glass batch materials in a high-temperature furnace at 1600℃, melting them at high temperature into glass liquid, and flowing them into the clarification zone and the homogenization zone; then slowly flowing the glass liquid into the liquid containing barrel 1 of the pressure treatment device through the liquid inlet pipe 2, applying a certain pressure to the glass liquid through the telescopic mechanism 5 and the pressure plate 4 to break the bubbles, opening the first valve 31, allowing the glass liquid to flow into the annealing and molding zone along the connecting pipe 3, and finally annealing and molding at 550℃.

[0057] The composite glass clarifier includes 65% NaCl and 16% CaSO 4 、14%NaNO 3 .

[0058] Embodiment 3

[0059] like Figure 1 and 2 As shown, based on the above specific implementation manner, this embodiment further provides the following contents:

[0060] A method for efficiently clarifying neutral borosilicate glass containing 70% SiO 2 , 10% Al 2 O 3 9% B 2 O 3 , 7%Na 2 O, 1.5% ZnO, 0.16% ZrO 2 , 2.04%TiO 2 , 0.3% composite glass clarifier; placing the evenly mixed glass batch materials in a high-temperature furnace at 1600℃, melting them at high temperature into glass liquid, and flowing them into the clarification zone and the homogenization zone; then slowly flowing the glass liquid into the liquid containing barrel 1 of the pressure treatment device through the liquid inlet pipe 2, applying a certain pressure to the glass liquid through the telescopic mechanism 5 and the pressure plate 4 to break the bubbles, opening the first valve 31, allowing the glass liquid to flow into the annealing and molding zone along the connecting pipe 3, and finally annealing and molding at 550℃.

[0061] The composite glass clarifier includes 60% NaCl and 20% CaSO 4 , 20% NaNO 3 .

[0062] According to the methods of the above-mentioned embodiments 1 to 3, neutral borosilicate glass was obtained respectively, and the number of bubbles and the average diameter of bubbles were tested respectively for the neutral borosilicate glass and ordinary neutral borosilicate glass. The test results are shown in the following Table 1:

[0063] Table 1:

[0064] category Number of bubbles Average bubble diameter (μm) Ordinary neutral borosilicate glass 120 0.6242 Example 1 12 0.2355 Example 2 6 0.3244 Example 3 4 0.3356

[0065] From Table 1 and Figure 2 It can be seen that the neutral borosilicate glass obtained by the high-efficiency clarification treatment method of the present invention has significantly fewer bubbles than ordinary neutral borosilicate glass, and the average diameter of the bubbles is also significantly reduced, which effectively improves the clarification effect of the neutral borosilicate glass.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for clarifying neutral borosilicate glass, characterized in that: The method comprises the following steps: Step S1: preparing a composite glass clarifier; Step S2: uniformly mixing the composite glass clarifier and glass raw materials to form a glass batch material, firing the glass batch material at a high temperature, clarifying and homogenizing the glass batch material to obtain a neutral borosilicate glass liquid; Step S3: slowly flowing the neutral borosilicate glass liquid into a pressure treatment device, and applying a certain pressure to the glass liquid by the pressure treatment device to break the residual bubbles in the glass liquid; Step S4: performing annealing and forming treatment on the glass liquid flowing out of the pressure treatment device; In step S1, the composite glass clarifier is composed of the following raw materials in parts by weight: 60-70 parts of NaCl, 10-20 parts of CaSO4, and 10-20 parts of NaNO3; In step S3, the pressure treatment device comprises a liquid containing barrel (1), a liquid inlet pipe (2) is provided in the middle and upper part of the liquid containing barrel (1), a connecting pipe (3) is provided at the bottom of the liquid containing barrel (1), and a first valve (31) is provided on the connecting pipe (3); a pressure plate (4) is plugged into the axial gap in the liquid containing barrel (1), and an electric heating layer (7) is embedded in the pressure plate (4) and the inner wall of the liquid containing barrel (1); the pressure plate (4) is driven by a telescopic mechanism (5) provided on the top surface of the liquid containing barrel (1) to achieve lifting and lowering displacement; an air outlet pipe (6) is provided on the top surface of the liquid containing barrel (1), and a second valve (61) is provided on the air outlet pipe (6).

2. A method for clarification of neutral borosilicate glass according to claim 1, characterized in that: The NaCl, CaSO4 and NaNO3 in the composite glass clarifier are all solid powders, and the composite glass clarifier is prepared by uniformly mixing the three components according to a proportion.

3. A method for clarification of neutral borosilicate glass according to claim 1, characterized in that: Based on the total mass of the neutral borosilicate glass, the neutral borosilicate glass contains 70-75% SiO2, 5-10% Al2O3, 8-12% B2O3, 6-8% Na2O, 0.5-2% ZnO, 0.02-0.2% ZrO2, 0.1-2.0% TiO2 and 0.2-0.5% composite glass clarifier.

4. A method for clarification of neutral borosilicate glass according to claim 1, characterized in that: In step S2, the glass batch material is fired in a high temperature furnace at 1550-1600°C, kept at this temperature for 2-3 hours, and then flows into a clarification zone and a homogenization zone.

5. The method for clarification of neutral borosilicate glass according to claim 1, characterized in that: In step S4, the annealing temperature of the glass liquid is 500-600°C.

6. A method for clarifying neutral borosilicate glass according to claim 1, characterized in that: The telescopic mechanism (5) comprises a pressure rod (51), the pressure rod (51) vertically passes through the middle of the top surface of the liquid containing barrel (1), and the bottom end of the pressure rod (51) is vertically fixedly connected to the pressure plate (4); guide support grooves (52) are vertically symmetrically arranged around the pressure rod (51) on the top surface of the liquid containing barrel (1); the top end of the pressure rod (51) is vertically connected to a guide plate (53), and the ends of the guide plate (53) are respectively connected to the corresponding guide support grooves (52) in a longitudinal sliding manner; a transmission screw (54) is horizontally rotatably mounted between the tops of the two guide support grooves (52), a separation ring (541) is axially sleeved in the middle of the transmission screw (54), and the transmission screws (54) located on both sides of the separation ring (541) are respectively axially arranged with mutually opposite The guide plate (53) has a plurality of opposite threads, and the transmission screw (54) is axially threaded with sliders (55) along both sides of the separation ring (541); the middle part of the top surface of the guide plate (53) is vertically symmetrically connected with rectangular blocks (531) along its long side direction, and the ends of the rectangular blocks (531) are pivotally connected to the ends of the sliders (55) corresponding to the same side through connecting rods (56); one end of the transmission screw (54) is axially connected to a first gear (57), and a servo motor (58) is horizontally arranged directly below the first gear (57) through a suspension plate (581) vertically connected to the corresponding guide support groove (52), and the power output end of the servo motor (58) is axially connected to a second gear (59), and the second gear (59) is meshingly connected to the first gear (57).

7. A method for clarification of neutral borosilicate glass according to claim 6, characterized in that: The outer diameter of the second gear (59) is smaller than the outer diameter of the first gear (57).

8. A method for clarification of neutral borosilicate glass according to claim 1, characterized in that: When the pressure plate (4) applies pressure to the glass liquid in the liquid containing barrel (1), the first valve (31) of the connecting pipe (3) is in a closed state; after the pressure application is completed, the first valve (31) is opened, and the glass liquid in the liquid containing barrel (1) flows into the annealing and molding area along the connecting pipe (3).

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