Energy-saving type integrated preparation process of high-strength thin-wall beer bottle by pressing and blowing

Abstract

This invention discloses an energy-saving integrated pressure-blown molding process for high-strength, thin-walled beer bottles. The process comprises six steps: glass raw material pretreatment, melt homogenization, energy-saving integrated pressure-blown molding, gradient annealing, surface strengthening, and finished product inspection. By optimizing the raw material ratio, innovating the integrated pressure-blown mold structure, and employing segmented temperature control and waste heat recovery technology, the process achieves a synergistic effect of thin-walled and high-strength beer bottles while reducing production energy consumption. The beer bottles prepared by this invention have a wall thickness controlled at 1.2-1.8 mm, an impact strength ≥0.6 J, and an internal pressure resistance ≥1.8 MPa. Production energy consumption is reduced by 25%-35% compared to traditional processes, while molding efficiency is increased by 15%-20%, demonstrating significant energy-saving and economic benefits, making it suitable for large-scale industrial production.

Description

Technical Field

[0001] This invention belongs to the field of glass bottle manufacturing technology, specifically relating to an energy-saving integrated pressure blow molding process for high-strength thin-walled beer bottles. Background Technology

[0002] As the core carrier of beer packaging, the quality of beer bottles directly affects the safety of beer storage, transportation, and consumption. With the development of lightweighting and greening in the beer industry, thin-walled beer bottles are gradually becoming the mainstream trend due to their advantages such as lower raw material consumption, lower transportation costs, and better environmental performance. At the same time, beer bottles need to withstand certain impacts, pressures, and temperature changes during storage and transportation, thus placing high demands on their strength. The synergy between high strength and thin-walled design has become a key technical challenge in beer bottle manufacturing.

[0003] Currently, beer bottles are mainly manufactured using pressure blow molding. Compared to traditional blow molding, this process offers advantages such as uniform bottle shape, reduced wrinkles, and lighter weight, making bottles 20-50% lighter than those produced by blow molding of equivalent strength. However, in manufacturing high-strength thin-walled beer bottles, a single and prominent technical problem remains: excessive energy consumption and the difficulty in simultaneously achieving bottle strength and uniform wall thickness. Specifically, existing pressure blow molding processes often require increasing the melting temperature of the molten glass and extending the melting time to ensure bottle strength, leading to a significant increase in production energy consumption. Simultaneously, unreasonable mold design and improper control of blowing pressure and temperature during the pressure blow molding process can easily result in uneven bottle wall thickness distribution, with some areas being too thin or too thick. Areas that are too thin are prone to breakage, while areas that are too thick violate the thin-wall design concept and increase raw material and energy consumption. Furthermore, the low waste heat recovery rate of existing processes and the ineffective utilization of mold waste heat further exacerbate the energy consumption problem. Inappropriate annealing processes can also lead to excessive internal stress in the glass, reducing bottle strength and failing to meet the production requirements of high-strength thin-walled beer bottles.

[0004] In existing technologies, some solutions attempt to improve the aforementioned problems by optimizing raw material ratios or improving molding equipment, but none of them fundamentally resolve the contradiction between energy consumption and strength / wall thickness uniformity. For example, some European companies use surface ion exchange strengthening processes, which can improve bottle strength, but the coating process is complex and costly, making large-scale production difficult; some domestic companies use simple mold cooling optimization, which cannot effectively solve the wall thickness uniformity problem, and the energy consumption reduction effect is not significant. Therefore, the development of an integrated press-blown manufacturing process that can balance energy saving, high strength, and thin-walled glass has become a pressing technical challenge for the glass bottle manufacturing industry. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an energy-saving integrated press blow molding process for high-strength thin-walled beer bottles. This process solves the technical problems of excessive energy consumption and difficulty in achieving both bottle strength and wall thickness uniformity when using existing press blow molding processes to produce high-strength thin-walled beer bottles. It enables lightweight, high-strength, and energy-efficient production of beer bottles, improves production efficiency and product quality, and reduces production costs and energy consumption.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An energy-saving integrated pressure blow molding process for high-strength, thin-walled beer bottles includes the following steps: Step 1, Pretreatment of glass raw materials: Weigh the raw materials according to the following parts by weight: 68-75 parts of quartz sand, 18-22 parts of soda ash, 5-8 parts of limestone, 3-5 parts of dolomite, 2-4 parts of alumina, 1-2 parts of boron oxide, 0.3-0.8 parts of clarifying agent, and 0.2-0.5 parts of flux. After crushing the raw materials, pass them through an 80-100 mesh sieve, mix them evenly, and then send them into a dryer. Dry them at 120-150℃ for 20-30 minutes to remove the moisture from the raw materials. Step 2, melting and homogenization: The pretreated mixed raw materials are fed into an energy-saving glass furnace. Segmented heating is used, with the preheating section temperature controlled at 800-900℃, the melting section temperature controlled at 1450-1550℃, and the homogenization section temperature controlled at 1400-1450℃. The melting and homogenization time is 4-6 hours. At the same time, the waste heat of the furnace flue gas is recovered and used for raw material drying and preheating. Nitrogen gas is introduced during the melting process for protection to prevent the glass melt from oxidizing. Step 3, Energy-saving integrated blow molding: The temperature of the molten glass is adjusted to 1200-1250℃ and quantitatively fed into the integrated blow molding die by a feeder. The integrated blow molding die includes a pre-pressing die, a forming die, and a blowing mechanism. The pre-pressing die adopts a stepped structure, and the inner wall of the forming die is provided with evenly distributed heat dissipation grooves. The blowing mechanism adopts a staged blowing mode, first pre-blowing with a pressure of 0.3-0.5MPa for 1-2 seconds, and then final blowing with a pressure of 0.8-1.2MPa for 3-5 seconds. During the blow molding process, the die temperature is controlled at 350-450℃, and the residual heat of the die is used to assist in glass forming. The forming time is 4-6 seconds. Step 4, Gradient Annealing: The molded beer bottles are placed into a gradient annealing furnace and a segmented annealing process is adopted. The temperature of the heating section is raised from room temperature to 520-550℃ at a heating rate of 5-8℃ / min. The temperature of the holding section is maintained at 520-550℃ for 15-20 minutes. The temperature of the cooling section is lowered from 520-550℃ to room temperature at a cooling rate of 3-5℃ / min. Inert gas is introduced during the annealing process to reduce oxidation on the bottle surface. Step 5, Surface strengthening: Clean the surface of the annealed beer bottle to remove surface impurities, and then use chemical strengthening method to immerse the beer bottle in a potassium nitrate solution at 450-480℃ for 2-3 hours to achieve ion exchange on the glass surface. After strengthening, wash the beer bottle with water and dry it. Step 6, Finished Product Inspection: The surface-strengthened beer bottles undergo appearance inspection, size inspection, strength inspection, and internal pressure resistance inspection. Qualified products are packaged and stored, while unqualified products are crushed and recycled as raw materials for production.

[0008] In a preferred embodiment of the present invention, in step 1, the clarifying agent is a mixture of sodium nitrate and antimony oxide in a weight ratio of 2:1; the flux is a mixture of calcium fluoride and lithium oxide in a weight ratio of 3:1.

[0009] In a preferred embodiment of the present invention, in step 2, the energy-saving glass melting furnace includes a furnace body, a waste heat recovery device, and a heat insulation layer. The waste heat recovery device is installed at the flue gas outlet of the furnace body to recover heat from the flue gas. The recovered heat is transported to the raw material dryer and the furnace preheating section through heat conduction pipes. The heat insulation layer is made of aluminum silicate fiber material with a thickness of 100-150mm. The heat loss of the furnace is controlled below 5%.

[0010] In a preferred embodiment of the present invention, in step 3, the pre-compression mold of the integrated blow molding die has a stepped structure including an upper stepped section, a middle stepped section and a lower stepped section. The diameter of the upper stepped section is 1.2-1.3 times the diameter of the beer bottle mouth, the diameter of the middle stepped section is 0.8-0.9 times the maximum diameter of the beer bottle body, and the diameter of the lower stepped section is the same as the diameter of the beer bottle bottom. The roughness of the inner wall of the pre-compression mold is ≤Ra0.8μm.

[0011] In a preferred embodiment of the present invention, in step 3, the heat dissipation grooves on the inner wall of the molding mold are evenly distributed in a spiral shape. The width of the heat dissipation grooves is 2-3 mm, the depth is 1-1.5 mm, the spacing between adjacent heat dissipation grooves is 8-10 mm, and the molding mold is made of heat-resistant alloy material with a heat resistance temperature ≥800℃.

[0012] In a preferred embodiment of the present invention, in step 3, in the graded blowing mode, the blowing time of the pre-blowing stage is 1.2-1.8s, the blowing time of the final blowing stage is 3.5-4.5s, the final blowing pressure is 0.5-0.7MPa higher than the pre-blowing pressure, and dry compressed air is used during the blowing process, with the air dew point ≤-40℃.

[0013] In a preferred embodiment of the present invention, in step 4, the heating section of the gradient annealing furnace is divided into two sections: the first section heats from room temperature to 300°C at a heating rate of 6-8°C / min, and the second section heats from 300°C to 520-550°C at a heating rate of 5-6°C / min; the cooling section is divided into two sections: the first section cools from 520-550°C to 300°C at a cooling rate of 4-5°C / min, and the second section cools from 300°C to room temperature at a cooling rate of 3-4°C / min.

[0014] In a preferred embodiment of the present invention, in step 5, the purity of potassium nitrate in the chemically fortified potassium nitrate solution is ≥99.5%, 0.1-0.2% potassium nitrate is added to the solution as a promoter, the solution temperature fluctuation is kept ≤5℃ during the soaking process, and the stirring rate is 50-80r / min.

[0015] In a preferred embodiment of the present invention, step 6 includes strength testing of impact strength and vertical load strength. Impact strength is tested using the falling ball impact method, with the impact ball weighing 1000g and falling from a height of 1.5m. Vertical load strength is tested using a pressure testing machine with a loading rate of 5mm / min. The passing criteria are impact strength ≥0.6J, vertical load strength ≥9800N, internal pressure resistance ≥1.8MPa, and bottle wall thickness deviation ≤±0.1mm.

[0016] A high-strength thin-walled beer bottle manufactured using the above-mentioned energy-saving pressure blow molding integrated manufacturing process has the following characteristics: the bottle wall thickness is 1.2-1.8 mm, the outer diameter of the bottle body is 72-105 mm, the bottom thickness is 3.0-4.4 mm, the bottle body thickness-to-thickness ratio is ≤1.2:1, the bottom thickness-to-thickness ratio is ≤1.2:1, the impact strength is ≥0.6 J, the internal pressure resistance is ≥1.8 MPa, and the vertical load strength is ≥9800 N.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention precisely solves the technical problems of excessive energy consumption and difficulty in achieving both bottle strength and wall thickness uniformity in the existing pressure blow molding process for producing high-strength, thin-walled beer bottles. By optimizing the raw material ratio, innovating the integrated pressure blow molding die structure, and adopting segmented temperature control and waste heat recovery technology, it achieves a synergistic effect of energy saving, high strength, and thin wall thickness. The addition of alumina and boron oxide to the raw materials improves the strength and toughness of the glass while reducing the melting temperature and energy consumption. The stepped pre-pressing die and spiral heat dissipation groove design of the integrated pressure blow molding die ensure uniform bottle wall thickness and avoid localized areas that are too thin or too thick. The waste heat recovery device uses the waste heat from the furnace flue gas for raw material drying and preheating, and the waste heat from the die assists in glass forming, significantly reducing production energy consumption by 25%-35% compared to traditional processes.

[0018] 2. The beer bottle prepared by this invention has excellent mechanical properties and dimensional accuracy. The bottle wall thickness is controlled at 1.2-1.8mm, realizing a thin-wall design and reducing raw material consumption by 15%-20%. The impact strength is ≥0.6J, the internal pressure resistance is ≥1.8MPa, the vertical load strength is ≥9800N, and the internal stress is ≤4 levels, which meets the national standard requirements for beer bottles. This solves the problem of insufficient strength of traditional thin-walled beer bottles and improves the storage and transportation safety of beer bottles.

[0019] 3. This invention adopts an integrated pressure blow molding process, which reduces mold switching time and improves molding efficiency by 15%-20% compared with traditional processes. At the same time, defective products are crushed, recycled and reused, realizing the recycling of raw materials, reducing production costs and environmental pressure, and is suitable for large-scale industrial production.

[0020] 4. The gradient annealing process and surface chemical strengthening process of this invention effectively eliminate the thermal stress inside the glass, while forming a high-strength strengthening layer on the bottle surface, further improving the strength and toughness of the bottle and extending the service life of the beer bottle; the graded blowing mode and precise temperature control ensure the stability of the bottle forming quality, and the product qualification rate is increased to over 99%. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments or prior art, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a flowchart illustrating an energy-saving integrated pressure blow molding process for a high-strength, thin-walled beer bottle, as provided in an embodiment of this application.

[0023] Figure 2 This is a schematic diagram of an energy-saving glass melting furnace provided in an embodiment of this application.

[0024] Figure 3 This is a structural schematic diagram of an integrated blow molding die provided in an embodiment of this application.

[0025] Figure 4 This is a schematic diagram of a stepped structure of a pre-compression mold provided in an embodiment of this application.

[0026] Figure 5 This is a schematic diagram of a heat dissipation groove structure on the inner wall of a molding die, provided in an embodiment of this application.

[0027] Figure 6 This is a structural schematic diagram of a high-strength thin-walled beer bottle provided in an embodiment of this application. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0029] refer to Figures 1-5 This invention provides an energy-saving integrated pressure blow molding process for high-strength thin-walled beer bottles, addressing the technical problems of excessive energy consumption and difficulty in achieving both bottle strength and wall thickness uniformity in existing pressure blow molding processes. The process includes the following steps: Step 1, Pretreatment of glass raw materials: Weigh the raw materials according to the following parts by weight: 68-75 parts of quartz sand, 18-22 parts of soda ash, 5-8 parts of limestone, 3-5 parts of dolomite, 2-4 parts of alumina, 1-2 parts of boron oxide, 0.3-0.8 parts of clarifying agent, and 0.2-0.5 parts of flux. After crushing the raw materials, pass them through an 80-100 mesh sieve, mix them evenly, and then send them into a dryer. Dry them at 120-150℃ for 20-30 minutes to remove the moisture from the raw materials. Step 2, melting and homogenization: The pretreated mixed raw materials are fed into an energy-saving glass furnace. Segmented heating is used, with the preheating section temperature controlled at 800-900℃, the melting section temperature controlled at 1450-1550℃, and the homogenization section temperature controlled at 1400-1450℃. The melting and homogenization time is 4-6 hours. At the same time, the waste heat of the furnace flue gas is recovered and used for raw material drying and preheating. Nitrogen gas is introduced during the melting process for protection to prevent the glass melt from oxidizing. Step 3, Energy-saving integrated pressure blowing molding: The temperature of the molten glass is adjusted to 1200-1250℃ and quantitatively fed into the integrated pressure blowing mold by a feeder. The integrated pressure blowing mold includes a pre-pressing mold 4, a forming mold 5, and an air blowing mechanism 6. The pre-pressing mold 4 adopts a stepped structure. The inner wall of the forming mold 5 is provided with evenly distributed heat dissipation grooves. The air blowing mechanism 6 adopts a staged air blowing mode, first pre-blowing with a pressure of 0.3-0.5MPa for 1-2s, and then final blowing with a pressure of 0.8-1.2MPa for 3-5s. During the pressure blowing process, the mold temperature is controlled at 350-450℃, and the residual heat of the mold is used to assist in glass forming. The forming time is 4-6s. Step 4, Gradient Annealing: The molded beer bottles are placed into a gradient annealing furnace and a segmented annealing process is adopted. The temperature of the heating section is raised from room temperature to 520-550℃ at a heating rate of 5-8℃ / min. The temperature of the holding section is maintained at 520-550℃ for 15-20 minutes. The temperature of the cooling section is lowered from 520-550℃ to room temperature at a cooling rate of 3-5℃ / min. Inert gas is introduced during the annealing process to reduce oxidation on the bottle surface. Step 5, Surface strengthening: Clean the surface of the annealed beer bottle to remove surface impurities, and then use chemical strengthening method to immerse the beer bottle in a potassium nitrate solution at 450-480℃ for 2-3 hours to achieve ion exchange on the glass surface. After strengthening, wash the beer bottle with water and dry it. Step 6, Finished Product Inspection: The surface-strengthened beer bottles undergo appearance inspection, size inspection, strength inspection, and internal pressure resistance inspection. Qualified products are packaged and stored, while unqualified products are crushed and recycled as raw materials for production.

[0030] In step 1, the clarifying agent is a mixture of sodium nitrate and antimony oxide in a weight ratio of 2:1; the flux is a mixture of calcium fluoride and lithium oxide in a weight ratio of 3:1.

[0031] In step 1 above, quartz sand, as the main skeletal component of glass, is selected with a purity of ≥99%, which can improve the strength and heat resistance of the glass; aluminum oxide can improve the mechanical strength and chemical stability of the glass, preventing the bottle from breaking; boron oxide can lower the melting temperature of the glass, reduce energy consumption, and improve the toughness of the glass; the clarifying agent is a mixture of sodium nitrate and antimony oxide (weight ratio 2:1), which can effectively remove bubbles in the molten glass and improve the transparency and uniformity of the glass; the flux is a mixture of calcium fluoride and lithium oxide (weight ratio 3:1), which can reduce the melting viscosity of the glass, shorten the melting time, and further reduce energy consumption.

[0032] The above raw materials are fed into a crusher for pulverization, and then passed through an 80-100 mesh sieve to ensure uniform particle size and prevent incomplete melting due to excessively large particles. The sieved raw materials are then fed into a mixer and mixed for 15-20 minutes to ensure uniform composition of the molten glass. Subsequently, the uniformly mixed raw materials are fed into a dryer and dried at 120-150℃ for 20-30 minutes to remove moisture, preventing the formation of bubbles during melting that could affect glass quality, and also reducing energy consumption during the melting process.

[0033] In step 2, the energy-saving glass melting furnace includes a furnace body 1, a waste heat recovery device 2, and an insulation layer 3. The waste heat recovery device 2 is located at the flue gas outlet of the furnace body 1 and is used to recover heat from the flue gas. The recovered heat is transported to the raw material dryer and the furnace preheating section through heat conduction pipes. The insulation layer 3 is made of aluminum silicate fiber material with a thickness of 100-150mm. The heat loss of the furnace is controlled below 5%.

[0034] In step 2 above, the pretreated mixed raw materials are fed into an energy-saving glass melting furnace. The furnace includes a furnace body 1, a waste heat recovery device 2, and an insulation layer 3. The waste heat recovery device 2 is located at the flue gas outlet of the furnace body 1 and is used to recover heat from the flue gas. The recovered heat is transported to the raw material dryer and the furnace preheating section through heat conduction pipes to realize the recycling of waste heat and reduce overall energy consumption. The insulation layer is made of aluminum silicate fiber material with a thickness of 100-150mm, which can effectively reduce the heat loss of the furnace and control the heat loss to below 5%.

[0035] A segmented heating method is adopted to avoid energy waste and uneven glass melting caused by heating at a single temperature. The preheating section is controlled at 800-900℃ to preheat the raw materials to a softened state, preparing them for subsequent melting. The melting section is controlled at 1450-1550℃ to ensure the raw materials are fully melted, forming a uniform glass melt. The homogenization section is controlled at 1400-1450℃ to homogenize the molten glass, eliminating streaks and bubbles and improving its uniformity. The melting and homogenization time is 4-6 hours to ensure the glass melt is fully melted and homogenized, laying the foundation for subsequent forming.

[0036] Nitrogen gas is introduced for protection during the melting process, with the nitrogen flow rate controlled at 0.5-1.0 m³ / h. 3 / h, to prevent the molten glass from contacting oxygen in the air and undergoing an oxidation reaction, which would cause the molten glass to deteriorate and affect the strength and appearance of the bottle. At the same time, the viscosity and uniformity of the molten glass are tested regularly, and the viscosity is controlled at 1000-1500 Pa·s to ensure that the molten glass meets the molding requirements.

[0037] In step 3, the stepped structure of the pre-compression mold of the integrated blow molding die includes an upper stepped section 7, a middle stepped section 8, and a lower stepped section 9. The diameter of the upper stepped section 7 is 1.2-1.3 times the diameter of the beer bottle mouth, the diameter of the middle stepped section 8 is 0.8-0.9 times the maximum diameter of the beer bottle body, and the diameter of the lower stepped section 9 is the same as the diameter of the beer bottle bottom. The roughness of the inner wall of the pre-compression mold is ≤Ra0.8μm.

[0038] In step 3, the heat dissipation grooves on the inner wall of the molding mold are evenly distributed in a spiral shape. The width of the heat dissipation grooves is 2-3mm, the depth is 1-1.5mm, and the spacing between adjacent heat dissipation grooves is 8-10mm. The molding mold is made of heat-resistant alloy material with a heat resistance temperature ≥800℃.

[0039] In step 3, in the graded blowing mode, the blowing time in the pre-blowing stage is 1.2-1.8s, the blowing time in the final blowing stage is 3.5-4.5s, the final blowing pressure is 0.5-0.7MPa higher than the pre-blowing pressure, and dry compressed air is used during the blowing process with a dew point ≤-40℃.

[0040] In step 3 above, the temperature of the molten glass is adjusted to 1200-1250℃. This temperature ensures good fluidity of the glass for easy molding, while avoiding energy waste and bottle deformation caused by excessively high temperatures. The molten glass is quantitatively fed into the pressure blow molding die via a feeder. The feed amount is adjusted according to the specifications of the beer bottle, with an error controlled within ±0.5g to ensure uniform bottle weight.

[0041] The integrated pressure blow molding die includes a pre-pressing die 4, a forming die 5, and an air blowing mechanism 6. It adopts an integrated design, with the pre-pressing die 4 located above the forming die 5 and the air blowing mechanism 6 located above the pre-pressing die 4. It can extend downward into the pre-pressing die and the forming die to blow air. The integrated design reduces the die switching time, improves molding efficiency, and avoids heat loss during the die switching process, thus reducing energy consumption.

[0042] The pre-compression mold 4 adopts a stepped structure, including an upper stepped section 7, a middle stepped section 8, and a lower stepped section 9. The diameter of the upper stepped section 7 is 1.2-1.3 times the diameter of the beer bottle mouth, the diameter of the middle stepped section 8 is 0.8-0.9 times the maximum diameter of the beer bottle body, and the diameter of the lower stepped section 9 is the same as the diameter of the beer bottle bottom. This structure allows the molten glass to be evenly distributed during the pre-compression process, avoiding local accumulation and laying the foundation for subsequent blow molding, ensuring uniform bottle wall thickness. The inner wall roughness of the pre-compression mold is ≤Ra0.8μm, which reduces the friction between the molten glass and the inner wall of the mold, avoids scratches on the bottle surface, and facilitates the flow of molten glass, reducing molding resistance.

[0043] The inner wall of the forming mold 5 is provided with spirally distributed heat dissipation grooves 10. The width of the heat dissipation grooves 10 is 2-3mm, the depth is 1-1.5mm, and the spacing between adjacent heat dissipation grooves 10 is 8-10mm. The heat dissipation grooves 10 can make the heat of the glass melt dissipate evenly during the forming process, avoid uneven wall thickness and stress concentration caused by local rapid cooling, and at the same time use the residual heat absorbed by the mold to assist the glass forming, reducing additional heating energy consumption. The forming mold is made of heat-resistant alloy material with a heat resistance temperature ≥800℃, ensuring that the mold works stably in high-temperature environments and extending the service life of the mold.

[0044] The blowing mechanism 6 employs a staged blowing mode to overcome the problem of uneven bottle wall thickness caused by traditional single blowing pressure. First, a pre-blowing pressure of 0.3-0.5 MPa is applied for 1-2 seconds to initially shape the molten glass within the pre-press mold, forming a prototype consistent with the mold shape and avoiding localized thinning caused by direct high-pressure blowing. Then, a final blowing pressure of 0.8-1.2 MPa is applied for 3-5 seconds to blow the prototype into a beer bottle conforming to specifications. The final blowing pressure is 0.5-0.7 MPa higher than the pre-blowing pressure, ensuring a full bottle shape and uniform wall thickness. Dry compressed air with a dew point ≤-40℃ is used during the blowing process to prevent moisture from entering the molten glass, which could cause bubbles and cracks in the bottle. Simultaneously, the blowing speed is controlled to be uniform, avoiding bottle deformation caused by airflow impact.

[0045] During the pressure blowing process, the mold temperature is controlled at 350-450℃. This temperature allows the molten glass to cool slowly during the forming process, reducing internal stress. Simultaneously, the residual heat absorbed by the mold assists in glass forming, reducing additional heating energy consumption and achieving energy savings. The forming time is 4-6 seconds, balancing forming efficiency and product quality. After forming, the mold opens and closes quickly to remove the beer bottle and send it to the next process.

[0046] In step 4, the heating section of the gradient annealing furnace is divided into two stages: the first stage heats the furnace from room temperature to 300℃ at a rate of 6-8℃ / min, and the second stage heats the furnace from 300℃ to 520-550℃ at a rate of 5-6℃ / min; the cooling section is divided into two stages: the first stage cools the furnace from 520-550℃ to 300℃ at a rate of 4-5℃ / min, and the second stage cools the furnace from 300℃ to room temperature at a rate of 3-4℃ / min.

[0047] In step 4 above, the formed beer bottle is placed into a gradient annealing furnace, employing a segmented annealing process. The purpose is to eliminate internal thermal stress in the glass, improve the bottle's strength and toughness, and prevent breakage due to excessive stress. The gradient annealing furnace uses an intelligent temperature control system to precisely control the temperature and heating / cooling rates at each stage.

[0048] The heating stage is divided into two phases. The first phase raises the temperature from room temperature to 300℃ at a rate of 6-8℃ / min to avoid excessively rapid heating that could cause a large temperature difference between the surface and interior of the bottle, generating new stress. The second phase raises the temperature from 300℃ to 520-550℃ at a rate of 5-6℃ / min, slowly heating to the glass's annealing temperature to gradually release internal stress. The holding phase maintains the temperature at 520-550℃ for 15-20 minutes to ensure full release of internal stress and uniform distribution of the glass's composition, improving the bottle's uniformity and strength.

[0049] The cooling process is divided into two stages. The first stage cools the bottle from 520-550℃ to 300℃ at a rate of 4-5℃ / min, allowing for a slow and gradual cooling to prevent stress re-induction due to rapid cooling. The second stage cools the bottle from 300℃ to room temperature at a rate of 3-4℃ / min, ensuring a stable temperature drop and further eliminating residual stress. During annealing, an inert gas (nitrogen or argon) is introduced at a flow rate of 0.3-0.5 m³ / h to reduce contact between the bottle surface and oxygen in the air, preventing oxidation and improving the bottle's appearance.

[0050] In step 5, the purity of potassium nitrate in the chemically fortified potassium nitrate solution is ≥99.5%, and 0.1-0.2% potassium nitrate is added to the solution as a promoter. During the soaking process, the solution temperature fluctuation is kept ≤5℃, and the stirring rate is 50-80r / min.

[0051] In step 5 above, the annealed beer bottle is cleaned by first rinsing with deionized water to remove dust and impurities, then soaking in dilute hydrochloric acid (5-8% concentration) for 5-10 minutes to remove the oxide layer, then rinsing again with deionized water, and then placing it in a drying oven at 100-120℃ for 10-15 minutes to remove surface moisture and ensure the surface is clean and dry, in preparation for subsequent surface strengthening.

[0052] A chemical fortification method is used to surface-strengthen beer bottles. After cleaning and drying, the bottles are immersed in a potassium nitrate solution at 450-480℃ for 2-3 hours. The potassium nitrate in the solution has a purity of ≥99.5%. Adding 0.1-0.2% potassium nitrate as a promoter accelerates ion exchange and enhances the strengthening effect. During immersion, the solution temperature is maintained at ≤5℃, and the stirring rate is 50-80 r / min to ensure uniform solution concentration. This allows for sufficient exchange between sodium ions on the bottle surface and potassium ions in the solution, forming a high-strength surface-strengthening layer that improves the bottle's impact resistance and wear resistance.

[0053] After the fortification is completed, remove the beer bottles from the potassium nitrate solution, rinse them with deionized water to remove any residual solution from the surface, and then put them into a drying oven to dry at 120-150℃ for 15-20 minutes to ensure that the surface is dry and to prevent residual solution from corroding the bottle surface.

[0054] In step 6, the strength test includes impact strength test and vertical load strength test. The impact strength test is conducted using the falling ball impact method, with the impact ball weighing 1000g and falling from a height of 1.5m. The vertical load strength test is conducted using a pressure testing machine with a loading rate of 5mm / min. The passing criteria are impact strength ≥0.6J, vertical load strength ≥9800N, internal pressure resistance ≥1.8MPa, and bottle wall thickness deviation ≤±0.1mm.

[0055] In step 6 above, a comprehensive inspection is conducted on the surface-strengthened beer bottle to ensure that the product quality meets the requirements. The inspection items include appearance inspection, size inspection, strength inspection and internal pressure resistance inspection.

[0056] The appearance inspection combines manual inspection with machine vision inspection. Manual inspection checks the bottle surface for defects such as cracks, bubbles, scratches, and stones. Machine vision inspection uses a high-definition camera to capture images of the bottle from all angles, and image processing technology identifies minute defects, keeping the false negative rate below 0.5%. Dimensional inspection uses calipers and a projector to measure bottle wall thickness, outer diameter, height, and bottom thickness. The bottle wall thickness deviation is ≤±0.1mm, and the outer diameter and height deviations meet the national standards for beer bottles. The bottle thickness-to-weight ratio is ≤1.2:1, and the bottom thickness... Thinness ratio ≤ 1.2:1; Strength testing includes impact strength testing and vertical load strength testing. Impact strength testing is conducted using the falling ball impact method, with an impact ball weight of 1000g and a drop height of 1.5m. The pass standard is impact strength ≥ 0.6J; Vertical load strength testing is conducted using a pressure testing machine with a loading rate of 5mm / min. The pass standard is vertical load strength ≥ 9800N; Internal pressure resistance testing is conducted using an internal pressure testing machine, where compressed air is introduced into the bottle and the pressure is gradually increased. The pass standard is internal pressure resistance ≥ 1.8MPa, maintained for 30s without cracking or leakage.

[0057] Qualified products are sent to the packaging workshop, packaged with shockproof packaging materials, and stored in the warehouse; unqualified products are crushed and recycled, and the broken glass fragments are used as recycled raw materials and put back into the raw material pretreatment process in step 1 to realize the recycling of raw materials and further reduce production costs and environmental pressure.

[0058] refer to Figure 6 The present invention also provides a high-strength thin-walled beer bottle prepared using the above-mentioned energy-saving pressure blow molding integrated manufacturing process. The thickness of the bottle wall 12 is 1.2-1.8 mm, the outer diameter of the bottle body 11 is 72-105 mm, the thickness of the bottle bottom 13 is 3.0-4.4 mm, the thickness ratio of the bottle body 11 is ≤1.2:1, the thickness ratio of the bottle bottom is ≤1.2:1, the impact strength is ≥0.6 J, the internal pressure resistance is ≥1.8 MPa, the vertical load strength is ≥9800 N, and the internal stress is ≤4 levels.

[0059] Example 1 An energy-saving integrated pressure blow molding process for high-strength, thin-walled beer bottles includes the following steps: Step 1, Pretreatment of glass raw materials: Weigh the raw materials according to the following proportions by weight: 68 parts quartz sand, 18 parts soda ash, 5 parts limestone, 3 parts dolomite, 2 parts alumina, 1 part boron oxide, 0.3 parts clarifying agent (sodium nitrate to antimony oxide weight ratio 2:1), and 0.2 parts flux (calcium fluoride to lithium oxide weight ratio 3:1). Crush the raw materials and pass them through an 80-mesh sieve. Mix for 15 minutes, then send them to a dryer and dry at 120℃ for 30 minutes to remove moisture.

[0060] Step 2, Melting and Homogenization: The pretreated mixed raw materials are fed into an energy-saving glass melting furnace, which includes a furnace body, a waste heat recovery device, and an insulation layer (aluminosilicate fiber material, 100mm thick). Segmented heating is used: the preheating section temperature is 800℃, the melting section temperature is 1450℃, and the homogenization section temperature is 1400℃. The melting and homogenization time is 4 hours. Waste heat from the furnace flue gas is recovered for raw material drying and preheating. Nitrogen gas (flow rate 0.5 m³ / h) is introduced during the melting process for protection, and the viscosity of the molten glass is controlled at 1000 Pa·s.

[0061] Step 3, Energy-saving integrated pressure blow molding: The temperature of the molten glass is adjusted to 1200℃ and quantitatively fed into the integrated pressure blow mold via a feeder. The pre-press mold of the integrated pressure blow mold has a stepped structure. The diameter of the upper step is 1.2 times the diameter of the beer bottle mouth, the diameter of the middle step is 0.8 times the maximum diameter of the beer bottle body, and the diameter of the lower step is the same as the diameter of the beer bottle bottom. The roughness of the inner wall of the pre-press mold is Ra0.8μm. The inner wall of the forming mold is equipped with spiral heat dissipation grooves with a width of 2mm, a depth of 1mm, and an adjacent spacing of 8mm. The forming mold is made of heat-resistant alloy material (heat resistance temperature ≥800℃). The blowing mechanism adopts staged blowing, with a pre-blowing pressure of 0.3MPa and a time of 1s, and a final blowing pressure of 0.8MPa and a time of 3s. Dry compressed air (dew point ≤-40℃) is used for blowing. During the pressure blow process, the mold temperature is controlled at 350℃, and the forming time is 4s.

[0062] Step 4, Gradient Annealing: The molded beer bottles are placed in a gradient annealing furnace. The first heating stage raises the temperature from room temperature to 300°C at a rate of 6°C / min, and the second stage raises it from 300°C to 520°C at a rate of 5°C / min. The holding stage maintains the temperature at 520°C for 15 minutes. The first cooling stage lowers the temperature from 520°C to 300°C at a rate of 4°C / min, and the second stage lowers it from 300°C to room temperature at a rate of 3°C / min. Nitrogen gas (flow rate 0.3 m³ / min) is introduced during the annealing process. 3 / h).

[0063] Step 5, Surface strengthening: Rinse the annealed beer bottle with deionized water, soak in dilute hydrochloric acid (5% concentration) for 5 minutes, rinse again with deionized water, and dry at 100℃ for 15 minutes; immerse the beer bottle in a potassium nitrate solution (99.5% purity, with 0.1% potassium nitrate added) at 450℃ for 2 hours, with temperature fluctuations ≤5℃ and stirring speed of 50r / min during the soaking process; after strengthening, rinse with deionized water and dry at 120℃ for 20 minutes.

[0064] Step 6, Finished Product Inspection: The beer bottles undergo appearance inspection, dimensional inspection, strength testing, and internal pressure resistance testing. Appearance inspection revealed no cracks, bubbles, or other defects. Dimensional inspection showed a bottle wall thickness of 1.2mm, an outer diameter of 72mm, a bottom thickness of 3.0mm, a body thickness-to-bottom ratio of 1.2:1, and dimensional deviations meeting standards. Impact strength was 0.6J, vertical load strength was 9800N, and internal pressure resistance was 1.8MPa, all meeting the acceptable standards. Qualified products were packaged and put into storage.

[0065] In this embodiment, production energy consumption is reduced by 35% compared to traditional processes, molding efficiency is increased by 20%, and product qualification rate is 99.2%.

[0066] Example 2 An energy-saving integrated pressure blow molding process for high-strength, thin-walled beer bottles includes the following steps: Step 1, Pretreatment of glass raw materials: Weigh the raw materials according to the following proportions by weight: 72 parts quartz sand, 20 parts soda ash, 6.5 parts limestone, 4 parts dolomite, 3 parts alumina, 1.5 parts boron oxide, 0.55 parts clarifying agent (sodium nitrate to antimony oxide weight ratio 2:1), and 0.35 parts flux (calcium fluoride to lithium oxide weight ratio 3:1). Crush the raw materials and pass them through a 90-mesh sieve. Mix for 17 minutes, then send them to a dryer and dry at 135℃ for 25 minutes to remove moisture.

[0067] Step 2, Melting and Homogenization: The pretreated mixed raw materials are fed into an energy-saving glass melting furnace, which includes the furnace body, a waste heat recovery device, and an insulation layer (aluminosilicate fiber material, 125mm thick). Segmented heating is used: the preheating section temperature is 850℃, the melting section temperature is 1500℃, and the homogenization section temperature is 1425℃. The melting and homogenization time is 5 hours. Waste heat from the furnace flue gas is recovered for raw material drying and preheating. Nitrogen gas (flow rate 0.75 m³ / h) is introduced during the melting process for protection, and the viscosity of the molten glass is controlled at 1250 Pa·s.

[0068] Step 3, Energy-saving integrated pressure blow molding: The temperature of the molten glass is adjusted to 1225℃ and quantitatively fed into the integrated pressure blow mold via a feeder. The pre-press mold of the integrated pressure blow mold has a stepped structure. The diameter of the upper step is 1.25 times the diameter of the beer bottle mouth, the diameter of the middle step is 0.85 times the maximum diameter of the beer bottle body, and the diameter of the lower step is the same as the diameter of the beer bottle bottom. The roughness of the inner wall of the pre-press mold is Ra0.7μm. The inner wall of the forming mold is equipped with spiral heat dissipation grooves with a width of 2.5mm, a depth of 1.25mm, and an adjacent spacing of 9mm. The forming mold is made of heat-resistant alloy material (heat resistance temperature ≥800℃). The blowing mechanism adopts staged blowing, with a pre-blowing pressure of 0.4MPa and a time of 1.5s, and a final blowing pressure of 1.0MPa and a time of 4s. Dry compressed air (dew point ≤-40℃) is used for blowing. During the pressure blow process, the mold temperature is controlled at 400℃, and the forming time is 5s.

[0069] Step 4, Gradient Annealing: The molded beer bottle is placed into a gradient annealing furnace. The first heating stage raises the temperature from room temperature to 300°C at a rate of 7°C / min, and the second stage raises the temperature from 300°C to 535°C at a rate of 5.5°C / min. The holding stage is at 535°C for 17.5 min. The first cooling stage lowers the temperature from 535°C to 300°C at a rate of 4.5°C / min, and the second stage lowers the temperature from 300°C to room temperature at a rate of 3.5°C / min. Argon gas (flow rate 0.4 m³ / h) is introduced during the annealing process.

[0070] Step 5, Surface strengthening: Rinse the annealed beer bottle with deionized water, soak in dilute hydrochloric acid (concentration 6.5%) for 7.5 min, rinse again with deionized water, and dry at 110℃ for 12.5 min; immerse the beer bottle in a potassium nitrate solution (purity 99.7%, with 0.15% potassium nitrate added) at 465℃ for 2.5 h, with temperature fluctuation ≤5℃ and stirring rate 65 r / min during the soaking process; after strengthening, rinse with deionized water and dry at 135℃ for 17.5 min.

[0071] Step 6, Finished Product Inspection: The beer bottles undergo appearance inspection, dimensional inspection, strength testing, and internal pressure resistance testing. Appearance inspection revealed no cracks, bubbles, or other defects. Dimensional inspection showed a bottle wall thickness of 1.5mm, an outer diameter of 88mm, a bottom thickness of 3.6mm, a body thickness-to-thickness ratio of 1.1:1, and a bottom thickness-to-thickness ratio of 1.1:1, all meeting the standards. Impact strength was 0.7J, vertical load strength was 10500N, and internal pressure resistance was 2.0MPa, all meeting the acceptable standards. The qualified products were packaged and put into storage.

[0072] In this embodiment, production energy consumption is reduced by 30% compared to traditional processes, molding efficiency is increased by 17.5%, and product qualification rate is 99.5%.

[0073] Example 3 An energy-saving integrated pressure blow molding process for high-strength, thin-walled beer bottles includes the following steps: Step 1, Pretreatment of glass raw materials: Weigh the raw materials according to the following proportions by weight: 75 parts quartz sand, 22 parts soda ash, 8 parts limestone, 5 parts dolomite, 4 parts alumina, 2 parts boron oxide, 0.8 parts clarifying agent (sodium nitrate to antimony oxide weight ratio 2:1), and 0.5 parts flux (calcium fluoride to lithium oxide weight ratio 3:1). Crush the raw materials and pass them through a 100-mesh sieve. Mix for 20 minutes, then send them to a dryer and dry at 150℃ for 20 minutes to remove moisture.

[0074] Step 2, Melting and Homogenization: The pretreated mixed raw materials are fed into an energy-saving glass melting furnace, which includes the furnace body, a waste heat recovery device, and an insulation layer (aluminosilicate fiber material, 150mm thick). Segmented heating is used: preheating section temperature 900℃, melting section temperature 1550℃, homogenization section temperature 1450℃, and melting and homogenization time 6 hours. Waste heat from the furnace flue gas is recovered for raw material drying and preheating. Nitrogen gas (flow rate 1.0 m³ / h) is introduced during the melting process. 3 Protect the glass melt by using a method that allows it to be kept at a constant temperature ( / h), and control the viscosity of the glass melt at 1500 Pa·s.

[0075] Step 3, Energy-saving integrated pressure blow molding: The temperature of the molten glass is adjusted to 1250℃ and quantitatively fed into the integrated pressure blow mold via a feeder. The pre-press mold of the integrated pressure blow mold has a stepped structure. The diameter of the upper step is 1.3 times the diameter of the beer bottle mouth, the diameter of the middle step is 0.9 times the maximum diameter of the beer bottle body, and the diameter of the lower step is the same as the diameter of the beer bottle bottom. The roughness of the inner wall of the pre-press mold is Ra0.6μm. The inner wall of the forming mold is equipped with spiral heat dissipation grooves with a width of 3mm, a depth of 1.5mm, and an adjacent spacing of 10mm. The forming mold is made of heat-resistant alloy material (heat resistance temperature ≥800℃). The blowing mechanism adopts staged blowing, with a pre-blowing pressure of 0.5MPa and a time of 2s, and a final blowing pressure of 1.2MPa and a time of 5s. Dry compressed air (dew point ≤-40℃) is used for blowing. During the pressure blow process, the mold temperature is controlled at 450℃, and the forming time is 6s.

[0076] Step 4, Gradient Annealing: The molded beer bottle is placed into a gradient annealing furnace. The first heating section raises the temperature from room temperature to 300°C at a rate of 8°C / min, and the second section raises the temperature from 300°C to 550°C at a rate of 6°C / min. The holding temperature is 550°C for 20 minutes. The first cooling section lowers the temperature from 550°C to 300°C at a rate of 5°C / min, and the second section lowers the temperature from 300°C to room temperature at a rate of 4°C / min. Nitrogen gas (flow rate 0.5 m³ / h) is introduced during the annealing process.

[0077] Step 5, Surface strengthening: Rinse the annealed beer bottle with deionized water, soak in dilute hydrochloric acid (concentration 8%) for 10 min, rinse again with deionized water, and dry at 120℃ for 10 min; immerse the beer bottle in a potassium nitrate solution (purity 99.9%, with 0.2% potassium nitrate added) at 480℃ for 3 h, with temperature fluctuation ≤5℃ and stirring speed 80 r / min during the soaking process; after strengthening, rinse with deionized water and dry at 150℃ for 15 min.

[0078] Step 6, Finished Product Inspection: The beer bottles undergo appearance inspection, dimensional inspection, strength testing, and internal pressure resistance testing. Appearance inspection revealed no cracks, bubbles, or other defects. Dimensional inspection showed a bottle wall thickness of 1.8mm, an outer diameter of 105mm, a bottom thickness of 4.4mm, a body thickness-to-thickness ratio of 1.0:1, and a bottom thickness-to-thickness ratio of 1.0:1, all meeting the standards. Impact strength was 0.8J, vertical load strength was 11000N, and internal pressure resistance was 2.2MPa, all meeting the acceptable standards. The qualified products were packaged and put into storage.

[0079] This embodiment reduces production energy consumption by 25% compared to traditional processes, increases molding efficiency by 15%, and achieves a product qualification rate of 99.8%.

[0080] Comparative test A comparative experiment was conducted using the process of Example 2 of this invention and the traditional pressure blow molding process to prepare thin-walled beer bottles of the same specifications (wall thickness 1.5 mm). The comparison results are shown in the table below:

[0081] The comparative test results show that, compared with the traditional pressure blow molding process, the process of the present invention significantly reduces production energy consumption while significantly improving molding efficiency, bottle strength and dimensional accuracy, and greatly improves product qualification rate. It can effectively solve the technical problems of excessive energy consumption and difficulty in achieving both bottle strength and wall thickness uniformity in the existing technology, and has significant advantages.

[0082] The present invention presents an energy-saving integrated pressure blow molding process for high-strength, thin-walled beer bottles. The process is simple and easy to operate, requiring only commonly used equipment in the existing glass bottle manufacturing industry. No large-scale modifications are needed; it can be directly applied to existing production lines, resulting in low modification difficulty and cost. This process features low energy consumption, high molding efficiency, and stable product quality. The produced beer bottles meet national standards for beer bottles, satisfying the beer industry's demands for lightweight, high-strength, and environmentally friendly development. It can be widely applied to large-scale industrial production of beer bottles, possessing extremely high industrial practicality and market promotion value.

[0083] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. An energy-saving integrated pressure blow molding process for high-strength thin-walled beer bottles, characterized in that, Includes the following steps: Step 1, Pretreatment of glass raw materials: Weigh the raw materials according to the following parts by weight: 68-75 parts of quartz sand, 18-22 parts of soda ash, 5-8 parts of limestone, 3-5 parts of dolomite, 2-4 parts of alumina, 1-2 parts of boron oxide, 0.3-0.8 parts of clarifying agent, and 0.2-0.5 parts of flux. After crushing the raw materials, pass them through an 80-100 mesh sieve, mix them evenly, and then send them into a dryer. Dry them at 120-150℃ for 20-30 minutes to remove the moisture from the raw materials. Step 2, melting and homogenization: The pretreated mixed raw materials are fed into an energy-saving glass furnace. Segmented heating is used, with the preheating section temperature controlled at 800-900℃, the melting section temperature controlled at 1450-1550℃, and the homogenization section temperature controlled at 1400-1450℃. The melting and homogenization time is 4-6 hours. At the same time, the waste heat of the furnace flue gas is recovered and used for raw material drying and preheating. Nitrogen gas is introduced during the melting process for protection to prevent the glass melt from oxidizing. Step 3, Energy-saving integrated blow molding: The temperature of the molten glass is adjusted to 1200-1250℃ and quantitatively fed into the integrated blow molding die by a feeder. The integrated blow molding die includes a pre-pressing die, a forming die, and a blowing mechanism. The pre-pressing die adopts a stepped structure, and the inner wall of the forming die is provided with evenly distributed heat dissipation grooves. The blowing mechanism adopts a staged blowing mode, first pre-blowing with a pressure of 0.3-0.5MPa for 1-2 seconds, and then final blowing with a pressure of 0.8-1.2MPa for 3-5 seconds. During the blow molding process, the die temperature is controlled at 350-450℃, and the residual heat of the die is used to assist in glass forming. The forming time is 4-6 seconds. Step 4, Gradient Annealing: The molded beer bottles are placed into a gradient annealing furnace and a segmented annealing process is adopted. The temperature of the heating section is raised from room temperature to 520-550℃ at a heating rate of 5-8℃ / min. The temperature of the holding section is maintained at 520-550℃ for 15-20 minutes. The temperature of the cooling section is lowered from 520-550℃ to room temperature at a cooling rate of 3-5℃ / min. Inert gas is introduced during the annealing process to reduce oxidation on the bottle surface. Step 5, Surface strengthening: Clean the surface of the annealed beer bottle to remove surface impurities, and then use chemical strengthening method to immerse the beer bottle in a potassium nitrate solution at 450-480℃ for 2-3 hours to achieve ion exchange on the glass surface. After strengthening, wash the beer bottle with water and dry it. Step 6, Finished Product Inspection: The surface-strengthened beer bottles undergo appearance inspection, size inspection, strength inspection, and internal pressure resistance inspection. Qualified products are packaged and stored, while unqualified products are crushed and recycled as raw materials for production.

2. The energy-saving integrated pressure blow molding process for high-strength thin-walled beer bottles according to claim 1, characterized in that, In step 1, the clarifying agent is a mixture of sodium nitrate and antimony oxide in a weight ratio of 2:1; the flux is a mixture of calcium fluoride and lithium oxide in a weight ratio of 3:

1.

3. The energy-saving integrated pressure blow molding process for high-strength thin-walled beer bottles according to claim 1, characterized in that, In step 2, the energy-saving glass furnace includes a furnace body, a waste heat recovery device, and an insulation layer. The waste heat recovery device is located at the flue gas outlet of the furnace body and is used to recover heat from the flue gas. The recovered heat is transported to the raw material dryer and the furnace preheating section through heat conduction pipes. The insulation layer is made of aluminum silicate fiber material with a thickness of 100-150mm. The heat loss of the furnace is controlled below 5%.

4. The energy-saving integrated pressure blow molding process for high-strength thin-walled beer bottles according to claim 1, characterized in that, In step 3, the stepped structure of the pre-compression mold of the integrated blow molding die includes an upper stepped section, a middle stepped section and a lower stepped section. The diameter of the upper stepped section is 1.2-1.3 times the diameter of the beer bottle mouth, the diameter of the middle stepped section is 0.8-0.9 times the maximum diameter of the beer bottle body, and the diameter of the lower stepped section is the same as the diameter of the beer bottle bottom. The roughness of the inner wall of the pre-compression mold is ≤Ra0.8μm.

5. The energy-saving integrated pressure blow molding process for high-strength thin-walled beer bottles according to claim 1, characterized in that, In step 3, the heat dissipation grooves on the inner wall of the molding mold are evenly distributed in a spiral shape. The width of the heat dissipation grooves is 2-3mm, the depth is 1-1.5mm, and the spacing between adjacent heat dissipation grooves is 8-10mm. The molding mold is made of heat-resistant alloy material with a heat resistance temperature ≥800℃.

6. The energy-saving integrated pressure blow molding process for high-strength thin-walled beer bottles according to claim 1, characterized in that, In step 3, in the graded blowing mode, the blowing time in the pre-blowing stage is 1.2-1.8s, the blowing time in the final blowing stage is 3.5-4.5s, the final blowing pressure is 0.5-0.7MPa higher than the pre-blowing pressure, and dry compressed air is used during the blowing process with a dew point ≤-40℃.

7. The energy-saving integrated pressure blow molding process for high-strength thin-walled beer bottles according to claim 1, characterized in that, In step 4, the heating section of the gradient annealing furnace is divided into two stages: the first stage heats the furnace from room temperature to 300℃ at a rate of 6-8℃ / min, and the second stage heats the furnace from 300℃ to 520-550℃ at a rate of 5-6℃ / min; the cooling section is divided into two stages: the first stage cools the furnace from 520-550℃ to 300℃ at a rate of 4-5℃ / min, and the second stage cools the furnace from 300℃ to room temperature at a rate of 3-4℃ / min.

8. The energy-saving integrated pressure blow molding process for high-strength thin-walled beer bottles according to claim 1, characterized in that, In step 5, the purity of potassium nitrate in the chemically fortified potassium nitrate solution is ≥99.5%, and 0.1-0.2% potassium nitrate is added to the solution as a promoter. During the soaking process, the solution temperature fluctuation is kept ≤5℃, and the stirring rate is 50-80r / min.

9. The energy-saving integrated pressure blow molding process for high-strength thin-walled beer bottles according to claim 1, characterized in that, In step 6, the strength test includes impact strength test and vertical load strength test. The impact strength test is conducted using the falling ball impact method, with the impact ball weighing 1000g and falling from a height of 1.5m. The vertical load strength test is conducted using a pressure testing machine with a loading rate of 5mm / min. The passing criteria are impact strength ≥0.6J, vertical load strength ≥9800N, internal pressure resistance ≥1.8MPa, and bottle wall thickness deviation ≤±0.1mm.

10. A high-strength thin-walled beer bottle manufactured using an energy-saving pressure blow molding integrated process according to any one of claims 1-9, characterized in that, The beer bottle has a wall thickness of 1.2-1.8mm, an outer diameter of 72-105mm, a bottom thickness of 3.0-4.4mm, a body thickness-to-bottom ratio of ≤1.2:1, an impact strength of ≥0.6J, an internal pressure resistance of ≥1.8MPa, and a vertical load strength of ≥9800N.

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