A lightweight glass bottle manufacturing process

Abstract

The present application provides a lightweight glass bottle manufacturing process, which relates to the field of lightweight technology. The key points of the technical solution are: including: preparing raw materials, mixing the required raw materials; high-temperature melting, melting the raw materials into molten glass; glass forming, cooling the glass into the required shape, the material property of the glass formed by melting the raw materials is 100~101, and the glass forming adopts a small-mouth pressure blowing process. The lightweight glass bottle manufacturing process provided by the present application has the advantage of producing lightweight glass bottles with mechanical properties that meet the requirements.

Description

Technical Field

[0001] The present application relates to the field of lightweight technology, and in particular to a lightweight glass bottle manufacturing process. Background Art

[0002] Glass bottles are widely used loading containers. However, in order to ensure that the glass bottles have sufficient mechanical properties, the current glass bottles are generally too heavy, which results in too much material being required to produce the glass bottles, and thus resulting in excessively high production costs.

[0003] Improvements are needed to address the above problems. Summary of the invention

[0004] The purpose of the present application is to provide a lightweight glass bottle manufacturing process, which has the advantage of producing lightweight glass bottles with mechanical properties that meet the requirements.

[0005] In the first aspect, the present application provides a lightweight glass bottle manufacturing process, and the technical solution is as follows:

[0006] The method comprises: preparing raw materials, mixing the required raw materials; melting the raw materials at high temperature to melt them into molten glass; and glass forming, cooling the glass into a required shape. The material properties of the glass formed by melting the raw materials are 100-101, and the glass forming adopts a small-mouth pressure-blowing process.

[0007] Further, in the present application, the step of preparing raw materials includes: preparing powder raw materials and cullet raw materials, wherein the weight percentage of the powder raw materials is 27% to 32%, and the weight percentage of the cullet raw materials is 68% to 73%;

[0008] The powder raw materials include quartz sand, calcite, dry lithium feldspar, soda ash, sodium sulfate, selenium powder and carbon powder.

[0009] Furthermore, in the present application, the weight proportions of the various components in the powder raw material are:

[0010] Quartz sand: calcite: dry lithium feldspar: soda ash: sodium sulfate: selenium powder: carbon powder = (129.2~169.2): (49.5~59.2): (81.3~98.3): (52.7~64.1): (1.5~2.1): 0.26: (0.1~0.11).

[0011] Further, in the present application, the small-mouth pressure-blowing process includes:

[0012] Feeding, providing molten glass at 1188℃~1192℃;

[0013] Shearing the molten glass at 1185° C. to 1195° C. into droplets;

[0014] The drop is fed into a mold for pressure-blow forming, so that the ring-cut density of the formed glass bottle is maintained at 2.4-2.5.

[0015] Furthermore, in the present application, the forming step includes initial mold forming and final mold forming, the sheared droplet is sent to a first mold for stamping to form an initial mold, and the initial mold is sent to a second mold for blowing to form a final mold, so that the ring cutting density of the final mold is maintained at 2.4~2.5.

[0016] Furthermore, in the present application, feeding heating is also included between the high-temperature melting and the glass forming. The feeding heating is to transport the molten glass to a designated device for forming, and to heat the outer surface of the molten glass during the transportation process to ensure the thermal uniformity of the molten glass.

[0017] Further, in the present application, the feeding heating includes:

[0018] The rear channel is heated to control the bottom temperature of the molten glass;

[0019] Middle channel heating is used to control the middle layer temperature of the molten glass;

[0020] The front channel heating is used to control the surface temperature of the molten glass.

[0021] Furthermore, in the present application, in the high-temperature melting, the raw material is heated and melted in a kiln, and the radiation temperature of the raw material melting process is determined according to the refractory temperature of the kiln and the upper limit of the number of ash bubbles, and the upper limit of the number of ash bubbles is 60 / cm 2 .

[0022] Furthermore, in the present application, after the raw materials are melted into molten glass, the molten glass is bubbled to make the molten glass more uniform.

[0023] Furthermore, in the present application, after the glass is formed, the formed glass is subjected to hot spraying, annealing and cold spraying treatments to obtain a finished lightweight glass bottle.

[0024] From the above, it can be seen that the lightweight glass bottle manufacturing process provided by the present application selects raw materials with a material property of 100~101 for the glass formed after melting, and then cooperates with the small-mouth pressure-blowing process, so that the molten glass can maintain very good uniformity during the small-mouth pressure-blowing forming. Due to the very good uniformity, the amount of forming droplets can be reduced under the premise that the mechanical properties meet the requirements. Under the premise of having excellent uniformity, it can ensure that the mechanical properties meet the use requirements and reduce the overall weight of the glass bottle.

[0025] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic diagram of a lightweight glass bottle manufacturing process provided in this application. DETAILED DESCRIPTION

[0027] The technical solutions in the present application will be clearly and completely described below in conjunction with the drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the present application generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the present application for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0028] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] Please refer to Figure 1 , a lightweight glass bottle production process, the technical solution is as follows:

[0030] It includes: preparing raw materials, mixing the required raw materials; high-temperature melting, melting the raw materials into molten glass; glass forming, cooling the glass into the required shape. The material properties of the glass formed by the melted raw materials are 100~101, and the glass forming adopts the small-mouth pressure blowing process.

[0031] Through the above technical scheme, raw materials are selected so that the material properties of the glass after the selected raw materials are melted are in the range of 100~101, wherein the material property is a physical property of glass in a molten state, which refers to the speed at which the glass hardens as the temperature decreases. In the production and manufacturing of glass, the hardening speed of the glass plays a vital role in its uniformity. For example, if the hardening speed is fast but the forming speed cannot keep up, the fluidity of the glass will deteriorate, resulting in uneven thickness of the formed glass at different positions, and poor mechanical properties at thinner positions. In this case, in order to ensure that the overall glass meets the specified mechanical property requirements, the weight of the droplet can only be increased, which is also one of the main reasons for the excessive weight of glass bottles at present. In this regard, in the scheme of the present application, raw materials with material properties within the range of 100~101 are selected, and combined with the small-mouth pressure-blowing process, the forming speed of the glass bottle can be matched with the hardening speed of the glass during forming, thereby ensuring that the thickness uniformity of the entire glass bottle is relatively ideal, that is, the difference between the thinnest position and the thickest position is small. Therefore, compared with the traditional process, under the same amount of droplets, the thinnest position of the glass bottle manufactured by the process of the present application is thicker than the thinnest position of the glass bottle manufactured by the traditional process, and its mechanical properties are better. This also shows that when obtaining the same mechanical properties, the amount of droplets required by the process of the present application will be less, so the produced glass bottles are lighter. When achieving lightweight, the use of raw materials is effectively reduced, and the manufacturing cost is reduced.

[0032] Among them, the small-mouth pressure-blowing process is to first extrude the material droplets to form a primary mold, and after the primary mold is formed, the primary mold is blown to form a finished mold. Since the primary mold is formed by extrusion, its thickness uniformity can be guaranteed. By controlling the material properties of the raw materials and combining the small-mouth pressure-blowing process, the overall thickness distribution of the glass bottle is uniform, so that the glass bottle can be greatly reduced in weight while maintaining sufficient mechanical properties. In some specific embodiments, the process of this application can reduce the weight of the finished glass bottle from 320 grams to 215 grams, and the weight reduction can reach one-third, which greatly improves the utilization rate of the raw materials and has significant social and economic benefits.

[0033] Specifically, the material properties of the glass formed by mixing and melting the raw materials can be 100, 100.1, 100.2, 100.3, 100.4, 100.5, 100.6, 100.7, 100.8, 100.9 and 101.

[0034] Further, in some embodiments, the step of preparing raw materials includes: preparing powder raw materials and cullet raw materials, wherein the weight percentage of the powder raw materials is 27% to 32%, and the weight percentage of the cullet raw materials is 68% to 73%;

[0035] The powder raw materials include quartz sand, calcite, dry lithium feldspar, soda ash, sodium sulfate, selenium powder and carbon powder.

[0036] Through the above technical scheme, the raw materials are composed of powder raw materials and broken glass raw materials. The purpose of using broken glass raw materials is to recycle glass fragments. On this basis, the powder raw materials are added to form glass with a material property of 100~101.

[0037] Specifically, in some embodiments, the powder raw material accounts for 27% and the cullet raw material accounts for 73%;

[0038] Specifically, in some embodiments, the powder raw material accounts for 32% and the cullet raw material accounts for 68%;

[0039] Furthermore, in some of the embodiments, the weight proportions of the components in the powder raw material are:

[0040] Quartz sand: calcite: dry lithium feldspar: soda ash: sodium sulfate: selenium powder: carbon powder = (129.2~169.2): (49.5~59.2): (81.3~98.3): (52.7~64.1): (1.5~2.1): 0.26: (0.1~0.11).

[0041] Through the above technical solution, the above ratio is used to form glass with a material property between 100 and 101 and excellent overall quality.

[0042] Specifically, in some embodiments, quartz sand: calcite: dry lithium feldspar: soda ash: sodium sulfate: selenium powder: carbon powder = 129.2: 49.5: 83.4: 52.7: 1.5: 0.26: 0.1;

[0043] Specifically, in some embodiments, quartz sand: calcite: dry lithium feldspar: soda ash: sodium sulfate: selenium powder: carbon powder = 161.4: 59.2: 89.2: 64.1: 1.6: 0.26: 0.11;

[0044] Specifically, in some embodiments, quartz sand: calcite: dry lithium feldspar: soda ash: sodium sulfate: selenium powder: carbon powder = 158.9: 59.2: 91.9: 63.9: 1.5: 0.26: 0.11;

[0045] Specifically, in some embodiments, quartz sand: calcite: dry lithium feldspar: soda ash: sodium sulfate: selenium powder: carbon powder = 169.2: 59.0: 81.3: 63.7: 2.1: 0.26: 0.14;

[0046] Specifically, in some embodiments, quartz sand: calcite: dry lithium feldspar: soda ash: sodium sulfate: selenium powder: carbon powder = 153.2: 59: 98.3: 63.4: 1.5: 0.26: 0.10;

[0047] Specifically, in some embodiments, quartz sand: calcite: dry lithium feldspar: soda ash: sodium sulfate: selenium powder: carbon powder = 155.6: 59.1: 95.6: 63.6: 1.5: 0.26: 0.11;

[0048] Specifically, in some embodiments, quartz sand: calcite: dry lithium feldspar: soda ash: sodium sulfate: selenium powder: carbon powder = 157.2: 59.2: 93.7: 63.8: 1.5: 0.26: 0.11.

[0049] Further, in some embodiments, the small-mouth pressure-blow process includes:

[0050] Feeding, providing molten glass at 1188℃~1192℃;

[0051] Shearing: Shearing the molten glass at 1185℃~1195℃ into droplets;

[0052] Forming, the drop of material is sent into the mold for pressure-blow forming, so that the ring cutting density of the formed glass bottle is maintained at 2.4~2.5.

[0053] Through the above technical scheme, firstly, molten glass at 1188℃~1192℃ is provided as the raw material for small-mouth pressure-blowing forming. The temperature is controlled at 1188℃~1192℃ to facilitate the processing of the molten glass in the subsequent steps. For example, in the subsequent shearing process, if the temperature of the glass is too high, the fluidity is large and it is difficult to control the weight of the droplets after shearing. Similarly, if the temperature is too low, the viscosity of the glass is large, which will also cause the problem of difficulty in shearing. Therefore, after verification of a large amount of experimental data, it is most appropriate to provide molten glass at 1188℃~1192℃, and in this process, it is necessary to ensure that the temperature of the molten glass is stable within this range, because when the temperature difference is relatively large, the weight difference of the droplets formed by material reduction will also become larger, which will cause the weight difference of the finished product to be relatively large, and the problem of unstable quality will occur. After the shearing is completed, the droplets are press-blown to make the ring-cut density of the formed glass bottle remain between 2.4 and 2.5.

[0054] The ring-cut density refers to the density ratio between the thickest part and the thinnest part after the glass bottle is cut. It is more appropriate to keep the ring-cut density between 2.4 and 2.5.

[0055] Among them, the ring cutting density is affected by both the glass raw materials and the forming process.

[0056] In addition, it also includes mold temperature balance, adjusting the center of the cooling air flow outside the die to make the front and rear dies cool uniformly, which can reduce the temperature difference to within 10~20℃ and reduce the defects of different molding temperatures of the front and rear dies and the die.

[0057] In addition, in the original scheme, the heat dissipation of the mold close to the inner side of the bottle making machine is weaker than that of the outer mold, and the temperature difference of the mold is generally 30~40℃. By improving the structure inside the vertical cooling cylinder to change the air flow distribution, specifically, more cooling air is allocated to the mold with high temperature, balancing the temperature difference of the mold caused by different positions, so that the extension and distribution of the glass during molding are more uniform, and the cooling is consistent, making production adjustments easier;

[0058] In addition, the cleanliness of the molding gas system has also been improved. The molding gas is dried and dust-removed as soon as it leaves the air compression station, and is transported to the stainless steel gas storage tank of the row machine through stainless steel pipes. The transportation process minimizes the moisture, dust, and impurities contained in the airflow, so that the molded glass bottles maintain the mechanical strength of impact resistance and internal pressure resistance required for use.

[0059] Through the above-mentioned solutions, the distribution of glass bottles can be made more uniform, and the mechanical strength of impact resistance and internal pressure resistance can be higher, so that the amount of glass used can be reduced while maintaining the same mechanical properties, thereby achieving the effect of lightweighting.

[0060] Furthermore, in some of the embodiments, the forming step includes initial mold forming and final mold forming, the sheared droplet is sent to the first mold for stamping to form an initial mold, and the initial mold is sent to the second mold for blowing to form a final mold, so that the ring cutting density of the final mold is maintained at 2.4~2.5.

[0061] Through the above technical scheme, the sheared droplets are fed into the first mold, and then the droplets are punched out to form a primary mold by extrusion with a punch. Since the punch is used for extrusion, the droplets can be distributed more evenly along the contour of the first mold. After the primary mold is formed, the primary mold is placed in the second mold, and then the primary mold is blown into a finished mold by blowing, which is conducive to improving the overall uniformity of the finished mold.

[0062] Specifically, in some embodiments, the temperature of the molten glass provided is 1188°C~1192°C, the weight of the droplet after shearing is 214g~216g, and when the droplet is punched in the first mold, the punching pressure of the punch is 0.03 MPa~0.05 MPa, and the punching time is 1.4 seconds~1.6 seconds. After the initial mold is formed by punching, it is blown in the second mold, and the blowing pressure is 0.12 MPa~0.14 MPa, and the blowing time is 1.7~1.8 seconds. After the above process, a droplet of material is pressed and blown into a mold of a glass bottle.

[0063] Specifically, in some embodiments, the product AD30012A produced using the old process is shown in the following table:

[0064] Model 03 14 20 02 18 22 08 26 average value Empty bottle weight 218.0 218.0 217.8 218.0 218.1 218.0 217.8 218.0 218.0 Nominal capacity 501.5 503.5 502.5 502.4 501.0 502.1 501.7 501.2 502.0 Model 23 09 05 29 24 28 15 17 Empty bottle weight 218.0 217.6 217.6 218.0 217.6 217.8 217.9 217.5 217.8 Nominal capacity 501.0 502.2 501.1 501.1 501.3 502.2 501.1 501.1 501.4 Impact resistance ≥ 0.25J Thermal shock resistance ≥ 50℃ Model 18 10 04 16 23 12 07 11 average value Empty bottle weight 216.9 217.0 217.2 217.2 217.0 216.9 217.1 217.0 217.0 Nominal capacity 503.5 502.4 502.0 502.3 502.5 502.0 501.4 501.1 502.2 Model 06 02 21 22 13 20 08 05 Empty bottle weight 216.2 216.7 216.9 217.1 217.2 217.1 216.8 217.0 216.9 Nominal capacity 502.8 502.0 501.5 501.5 501.9 501.3 502.0 501.8 501.9 Impact resistance ≥ 0.25J Thermal shock resistance ≥ 50℃ Model 20 15 08 18 10 09 13 22 average value Empty bottle weight 218.3 218.0 218.4 218.4 218.6 218.4 218.0 218.2 218.3 Nominal capacity 501.4 501.5 501.5 501.6 500.0 500.8 500.3 501.4 501.1 Model 29 14 05 03 28 26 24 23 Empty bottle weight 218.2 218.8 218.2 217.8 218.2 218.7 218.6 218.7 218.4 Nominal capacity 500.1 500.7 500.9 501.6 501.9 500.2 500.9 501.0 500.9 Impact resistance ≥ 0.25J Thermal shock resistance ≥ 50℃ Model 19 20 17 12 14 04 16 26 average value Empty bottle weight 218.6 218.3 218.5 218.3 218.4 218.6 218.4 218.3 218.4 Nominal capacity 500.9 501.0 500.0 500.7 500.5 501.3 500.8 500.9 500.8 Model 22 08 23 11 15 18 13 02 Empty bottle weight 218.4 218.3 218.6 218.7 218.4 218.5 218.3 218.9 218.5 Nominal capacity 501.2 500.0 501.8 500.6 500.2 500.0 500.5 500.9 500.7 Impact resistance ≥ 0.25J Thermal shock resistance ≥ 50℃

[0065] After the process modification of this application, the test results of the same model product are as follows:

[0066] Model 09 05 04 01 10 03 02 11 average value Empty bottle weight 196.3 195.7 197.2 197.9 196.2 196 198.7 195.1 196.64 Nominal capacity 503 503.2 502.8 501.5 503 503.2 501.1 503.4 502.65 Model 03 02 05 10 11 01 09 04 Empty bottle weight 199.7 200.4 199.2 199.8 199.2 199.5 199.4 196.3 199.19 Nominal capacity 503.2 502.4 502.4 502 502 502.4 502 503.9 502.54 Impact resistance ≥ 0.25J Thermal shock resistance ≥ 50℃

[0067] From the above data, we can see that while ensuring that the impact resistance is not weakened, the weight of the glass bottle originally designed to be 215 grams is reduced to the design standard of 195 grams, and the weight reduction effect reaches 9%.

[0068] Furthermore, in the present application, feeding heating is also included between high-temperature melting and glass forming. Feeding heating is to transport the molten glass to a designated device for forming, and to heat the outer surface of the molten glass during transportation to ensure the thermal uniformity of the molten glass.

[0069] Through the above technical solution, the glass raw materials are usually heated and melted in the kiln. After heating and melting, they need to be transported to the position of the forming process for forming. However, in this process, the molten glass needs to flow in the material channel and will spontaneously exchange heat with the outside world. Under the action of heat exchange, the outer surface and internal temperature of the molten glass will be inconsistent. If the temperature distribution of the molten glass is uneven, it will cause problems in subsequent forming. For example, when reducing materials, due to the uneven temperature distribution, some glasses have high temperatures and some have low temperatures. The fluidity of the high-temperature glass is high, and the fluidity of the low-temperature glass is poor. When the glass is cut into droplets, the weight of the droplets is uneven, which leads to a large difference in the weight of the subsequent finished products, resulting in the problem of unqualified inspection. In addition, since the fluidity of the high-temperature glass is high and the fluidity of the low-temperature glass is poor, the flow of the glass is inconsistent during forming, which will lead to the uneven thickness distribution of the glass bottle blown out by pressure, making the thickness of the local position relatively thin, resulting in mechanical properties not meeting the requirements. Therefore, ensuring that the molten glass plays a vital role in lightweighting during the transportation process.

[0070] Further, in some embodiments, the feed heating comprises:

[0071] The rear channel is heated to control the bottom temperature of the molten glass;

[0072] Middle channel heating is used to control the middle layer temperature of the molten glass;

[0073] The front channel heating is used to control the surface temperature of the molten glass.

[0074] Through the above technical scheme, the material channel is divided into at least three parts. In some specific implementation methods, the material channel can be equally divided or divided into three parts according to actual needs. The part close to the kiln is the rear material channel, the part close to the forming part is the front material channel, and the middle part is the middle material channel. According to practical experience, heating the rear end part of the entire material channel, that is, the rear material channel, will affect the bottom layer temperature of the molten glass during feeding. Heating the middle part of the entire material channel, that is, the middle material channel, will affect the middle layer temperature of the molten glass during feeding. Heating the front end part of the entire material channel, that is, the front material channel, will affect the surface temperature of the molten glass during feeding.

[0075] Therefore, specifically, in some embodiments, sensors can be set to detect the bottom temperature, middle temperature and surface temperature of the molten glass when it flows in the channel, and then according to the detection results, the positions of the rear channel, the middle channel and the front channel are controlled to be heated accordingly, so that the temperature distribution of the molten glass is uniform during feeding, and the temperature is controlled at 1188°C~1192°C.

[0076] Furthermore, in the present application, in the high-temperature melting, the raw materials are heated and melted in the kiln, and the radiation temperature of the raw material melting process is determined according to the refractory temperature of the kiln and the upper limit of the number of ash bubbles, and the upper limit of the number of ash bubbles is 60 / cm 2 .

[0077] The radiation temperature refers to the temperature used to heat the kiln. The higher the radiation temperature, the fewer bubbles will be generated during the melting process. The fewer bubbles, the better the quality of the finished glass. Bubbles refer to bubbles with a diameter less than 0.8 mm. However, the higher the radiation temperature, the higher the energy consumption. At the same time, the upper temperature limit of the kiln is also a problem that needs to be considered. Therefore, after a lot of experience, when the number of bubbles does not exceed 60 / cm 2 In this case, the lower the temperature, the better, because the number of ash bubbles is controlled to no more than 60 / cm 2 Under the condition of low temperature, it is enough to meet the quality requirements of glass products. On this basis, the lower the radiation temperature, the less energy is consumed and the longer the life of the kiln is.

[0078] Typically, in some embodiments, the radiation temperature is 1500°C to 1600°C.

[0079] Furthermore, in some embodiments, after the raw materials are melted into molten glass, the molten glass is bubbled to make the molten glass more uniform.

[0080] Through the above technical solution, the molten glass is stirred and tumbled by bubbling, so that the glass is fused more evenly, which is beneficial to improving the quality of the glass.

[0081] Furthermore, in some embodiments, after the glass is formed, the formed glass is subjected to hot spraying, annealing and cold spraying to obtain a finished lightweight glass bottle.

[0082] Through the above technical scheme, after the glass is formed, the existing hot spray liquid is sprayed on the formed glass bottle to fill and repair the micro cracks on the formed glass, and the hot sprayed glass is annealed. After the annealing treatment, the existing cold spray liquid is sprayed on the glass to form the final product.

[0083] The above description is only an embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lightweight glass bottle manufacturing process, comprising: Prepare ingredients and mix required ingredients; High temperature melting to melt the raw materials into molten glass; Glass forming, cooling the glass into a desired shape, characterized in that the glass forming adopts a small-mouth pressure-blowing process; The step of preparing raw materials includes: preparing powder raw materials and cullet raw materials, wherein the weight percentage of the powder raw materials is 27% to 32%, and the weight percentage of the cullet raw materials is 68% to 73%; The powder raw materials include quartz sand, calcite, dry lithium feldspar, soda ash, sodium sulfate, selenium powder and carbon powder; The weight proportions of the various components in the powder raw material are: Quartz sand: calcite: dry lithium feldspar: soda ash: sodium sulfate: selenium powder: carbon powder = (129.2~169.2): (49.5~59.2): (81.3~98.3): (52.7~64.1): (1.5~2.1): 0.26: (0.1~0.11); The small-mouth pressure-blow process comprises: Feeding, providing molten glass at 1188℃~1192℃; Shearing the molten glass at 1185° C. to 1195° C. into droplets; The drop is fed into a mold for pressure-blow molding, so that the ring-cut density of the formed glass bottle is maintained at 2.4-2.5; wherein the ring-cut density refers to the density ratio between the thickest position and the thinnest position after the glass bottle is cut.

2. A lightweight glass bottle manufacturing process according to claim 1, characterized in that: The forming steps include initial mold forming and final mold forming. The sheared droplet is sent to a first mold for stamping to form an initial mold, and the initial mold is sent to a second mold for blowing to form a final mold, so that the ring cutting density of the final mold is maintained at 2.4~2.

5.

3. A lightweight glass bottle manufacturing process according to claim 1, characterized in that: Between the high-temperature melting and the glass forming, there is also feeding heating, which is to transport the molten glass to a designated device for forming, and to heat the outer surface of the molten glass during the transportation process to ensure the thermal uniformity of the molten glass.

4. A lightweight glass bottle manufacturing process according to claim 3, characterized in that: The feeding heating comprises: The rear channel is heated to control the bottom temperature of the molten glass; Middle channel heating is used to control the middle layer temperature of the molten glass; The front channel heating is used to control the surface temperature of the molten glass.

5. A lightweight glass bottle manufacturing process according to claim 1, characterized in that: In the high-temperature melting, the raw material is heated and melted in a kiln, and the radiation temperature of the raw material melting process is determined according to the refractory temperature of the kiln and the upper limit of the number of ash bubbles, and the upper limit of the number of ash bubbles is 60 / cm 2 .

6. A lightweight glass bottle manufacturing process according to claim 1, characterized in that: After the raw materials are melted into molten glass, the molten glass is bubbled to make the molten glass more uniform.

7. A lightweight glass bottle manufacturing process according to claim 1, characterized in that: After the glass is formed, the formed glass is subjected to hot spraying, annealing and cold spraying treatments to obtain a finished lightweight glass bottle.

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