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CN-122010393-A - Light-weight double-section blowing type forming process for glass bottle

CN122010393ACN 122010393 ACN122010393 ACN 122010393ACN-122010393-A

Abstract

The invention provides a lightweight double-section blowing type molding process for glass bottles, belongs to the field of glass product processing, and solves the problems of low molding production efficiency, insufficient precision, poor system performance and the like of the existing glass bottles. The method comprises the following steps of S1, raw material preparation and melting, S2, feeding and primary forming, S3, shaping and strengthening, S4, annealing treatment, and S5, on-line detection and sorting. The invention successfully solves the problem of light weight and strength by double-section pressure blowing and adding special reinforcing agents, adopts dynamic primary blowing pressure control and servo precise control die movement based on viscosity, combines an online laser thickness measurement and intelligent feedback system, can automatically fine tune process parameters, improves product consistency and qualification rate, realizes quick, precise centering and collaborative adjustment of the die by arranging each core module with an electric three-dimensional positioning mechanism, integrates a set of full-flow quality monitoring system from molding to delivery, ensures mechanical reliability and durability of each delivery product, and avoids defective products.

Inventors

  • WEI JINGWU
  • LI ZHIQIANG

Assignees

  • 福建华兴玻璃有限公司

Dates

Publication Date
20260512
Application Date
20260213

Claims (10)

  1. 1. The light-weight double-section blowing type forming process for the glass bottle is characterized by comprising the following steps of: S1, preparing and melting raw materials, namely mixing 48-58% of quartz sand, 12-16% of sodium carbonate, 4-7% of limestone and cullet according to the weight percentage, wherein the mixing proportion of the cullet is 25-35%, simultaneously adding 1-3% of ZrO 2 as a reinforcing agent and 0.5-1.5% of Li 2 O as a fluxing agent, and heating the mixture in a tank furnace to 1500-1550 ℃ to melt into uniform glass liquid; S2, feeding and primary forming, namely cooling the glass liquid obtained in the step S1 to a proper forming temperature of 1150-1250 ℃, shearing the glass liquid into a gob with a specific weight through a feeding machine, and falling into a primary die cavity formed by the internal spaces of a primary gas injection top die assembly (5), a primary die assembly (3) and a turnover material moving die assembly (6), injecting gas into the primary die assembly (3) through the primary gas injection top die assembly (5), extruding the gob of the glass liquid downwards, enabling the gob of the glass liquid to be stably filled downwards, and blowing the primary gas injection bottom die assembly (2) for the first section from bottom to top, wherein the primary blowing pressure P1 is dynamically adjusted according to the real-time viscosity mu of the glass liquid, and satisfies the relation that P1= kln (mu) +b, wherein k and b are coefficients determined by simulation optimization based on the bottle shape, and the primary blowing is carried out under a lower pressure range of 0.28-0.32MPa, so as to form a primary blank; S3, shaping and strengthening, namely transferring a blank body formed in the blank mould assembly (3) into a forming mould assembly (10) by a turnover material moving mould assembly (6), and carrying out second-stage gas injection blowing by a forming gas injection top mould assembly (7) from top to bottom, wherein the glass blank body is tightly attached to the forming mould assembly (10) by final blowing under the higher pressure of 0.48-0.52MPa, so that the accurate forming of the bottle body is completed, and the opening and closing speed of the mould is accurately controlled by a servo motor in the process; s4, annealing treatment, namely, clamping the material moving assembly (8) to transfer the formed glass bottle to a conveying chain, conveying the glass bottle into an annealing furnace, setting a specific annealing temperature curve by adopting a low-temperature annealing process, and reducing the cooling rate by 15-25% compared with the traditional process so as to eliminate internal stress; S5, online detection and sorting, namely, the annealed glass bottle enters a detection station, and firstly, a laser thickness meter is adopted to carry out omnibearing scanning on the bottle body, and reject unqualified products with uniformity of wall thickness is carried out; When the system detects that the wall thickness of a certain specific area of the bottle body continuously exceeds the tolerance range for a plurality of times, the central controller automatically fine-adjusts the pressure parameter of the corresponding side blowing head or the closing gap of the mould, so as to realize the closed-loop self-adaptive adjustment of the technological parameters; And then performing multi-angle drop test and internal pressure resistance test to ensure the mechanical strength of the product.
  2. 2. The process of claim 1, wherein the central controller automatically feeds back and fine-adjusts the pressure parameters of the corresponding side blow heads or the closing gap of the mold when the system detects that the wall thickness of the specific area of the body is out of tolerance a plurality of times.
  3. 3. The light-weight double-section blowing molding process of the glass bottle according to claim 2, wherein the measuring precision of the laser thickness gauge is +/-0.02 mm, the drop test height is 1.2m-1.5m, and the pressure of the internal pressure resistance test is not lower than 60kPa.
  4. 4. The light-weight double-section blowing type molding process of the glass bottle according to claim 3, wherein the equipment adopted in the steps S2 and S3 comprises a primary mold frame (1), a turnover material moving mold assembly (6), a molding exhaust bottom mold (11) and a molding mold frame (9) which are sequentially arranged from left to right, the primary mold frame (1) is sequentially provided with a primary gas injection bottom mold assembly (2), the primary mold assembly (3), a material injection mold assembly (4) and a primary gas injection top mold assembly (5) from bottom to top, the molding mold frame (9) is sequentially provided with a molding mold assembly (10) and a molding gas injection top mold assembly (7) from bottom to top, the molding mold assembly (10) is positioned above a molding exhaust bottom mold (11), the molding mold frame (9) is further provided with a clamping material moving assembly (8), the clamping material moving assembly (8) is positioned at a position where the front side of the molding gas injection top mold assembly (7) is right, and the primary gas injection bottom mold assembly (2), the primary gas injection top mold assembly (5), the molding gas injection top mold assembly (7) and the molding gas injection top mold assembly (11) and an external air pump (11) are connected through electromagnetic valves.
  5. 5. The glass bottle light-weight double-section blowing type forming process according to claim 4 is characterized in that the primary air injection bottom die assembly (2) comprises a primary die electric positioning seat (15) capable of moving and adjusting on a primary die frame (1), a bottom die mounting rod (12) is fixed on the primary die electric positioning seat (15), a plurality of bottom die fixing seats (14) are arranged on the bottom die mounting rod (12), a lifting and adjusting primary die lifting air injection rod (13) is arranged in the bottom die fixing seats (14), the primary die lifting air injection rod (13) is connected with an external air pump through an electromagnetic valve, the primary die assembly (3) comprises a primary die electric positioning seat (21) capable of moving and adjusting on the primary die frame (1), a primary die mounting rod (17) is fixed on the primary die electric positioning seat (21), a plurality of primary die bodies (16) are arranged on the primary die mounting rod (17), and the primary die bodies (16) are located above the bottom die fixing seats (14) at corresponding positions.
  6. 6. The glass bottle light-weight double-section blowing type forming process according to claim 5, wherein the material injection mold assembly (4) comprises a material injection mold electric positioning seat (20) capable of being movably and adjustably arranged on a primary mold frame (1), a material injection mold mounting rod (18) is fixed on the material injection mold electric positioning seat (20), a plurality of material injection mold main bodies (19) are arranged on the material injection mold mounting rod (18), the material injection mold main bodies (19) are arranged above the primary mold main bodies (16) at corresponding positions, the primary gas injection top mold assembly (5) comprises a primary top mold electric positioning seat (25) capable of being movably and adjustably arranged on the primary mold frame (1), a primary top mold mounting rod (23) is fixed on the primary top mold electric positioning seat (25), a gas injection joint I (22) and a plurality of primary gas injection top mold heads (24) are arranged on the primary top mold mounting rod (20), the primary gas injection top mold main bodies (19) are arranged above the primary mold main bodies (16) at corresponding positions, and a gas injection joint I (22) is connected with a gas injection mold through a gas injection valve (24) at the lower end of the primary top mold.
  7. 7. The process for forming glass bottles by blowing according to claim 6, wherein the turnover material moving module (6) comprises an electric turnover seat (28), a turnover installation rod (26) and a limiter (27) are fixedly arranged on a turnover shaft of the electric turnover seat (28), a plurality of material moving die bodies (29) are arranged on the turnover installation rod (26), the material moving die bodies (29) are positioned above a bottom die fixing seat (14) at corresponding positions in the initial position, after the electric turnover seat (28) is turned 180 degrees, the material moving die bodies (29) are positioned between a forming gas injection top die assembly (7) and a forming die assembly (10), the forming gas injection top die assembly (7) comprises a forming top die electric position adjusting seat (33) capable of moving and adjusting on a forming die frame (9), a forming top die installation rod (34) is fixedly arranged on the forming top die electric position adjusting seat (33), a plurality of forming gas injection top dies (32) are arranged on the forming top die installation rod (34), lifting and adjustable top dies (32) are arranged inside the forming gas injection top dies, two gas injection top die joints (31) are connected with the two gas injection top die joints (30) through the two gas injection top die upper die adjusting seat (31), the upper end of the second gas injection joint (30) is connected with an external gas pump through an electromagnetic valve.
  8. 8. The glass bottle light-weight double-section blowing molding process according to claim 7, wherein the clamping and material shifting assembly (8) comprises an electric positioning seat (36) which can be shifted on a molding die frame (9) in a moving and adjusting mode, an electric rotating seat (37) is arranged on the electric positioning seat (36), a plurality of electric clamping jaws (35) are arranged on the electric rotating seat (37), the molding die assembly (10) comprises a molding die electric positioning seat (40) which can be shifted and adjusted on the molding die frame (9), a molding die mounting rod (39) is fixed on the molding die electric positioning seat (40), a plurality of molding die main bodies (38) are arranged on the molding die mounting rod (39), the molding die main bodies (38) are positioned above a molding exhaust bottom die (11) at corresponding positions, distributed cooling flow channels are arranged in the molding die main bodies (38), constant-temperature cooling media are introduced, the surface temperature of the molding die is maintained at 200-300 ℃, the fluctuation range is +/-5 ℃, and the molding process is ensured to be stable.
  9. 9. The process for forming glass bottles by lightweight two-stage blowing according to claim 8, wherein the material of the primary mold body (16) and the forming mold body (38) is H13 hot work mold steel, the surface of the cavity is plated with a diamond-like coating with the thickness of 2-4 μm, wherein the atomic percentage of tungsten element is 5-10%, and the friction coefficient of the surface of the coating is lower than 0.15.
  10. 10. A lightweight glass bottle manufactured by the molding process of claim 9 is characterized in that the bottom of the glass bottle is of a disc-shaped structure with annular reinforcing ribs, the ratio of the circular arc radius R of the cross section of the annular reinforcing ribs to the diameter D of the bottle body is R/D=0.08-0.12, the wall thickness from the bottle body to the bottle neck of the glass bottle is of a gradual change structure, the wall thickness of the bottle body is 1.8-2.0mm, the wall thickness is gradually reduced to 1.2-1.4mm towards the bottle neck, and the axial length L of a wall thickness gradual change region is 1.5-2.5 times of the diameter D of the bottle neck.

Description

Light-weight double-section blowing type forming process for glass bottle Technical Field The invention belongs to the technical field of glass product processing, and relates to a glass bottle forming process, in particular to a light-weight double-section blowing type glass bottle forming process. Background Along with the stringent environmental protection policy and the requirement of packaging cost control, the light weight of glass bottles has become a necessary trend in the white wine packaging industry. However, the conventional glass bottle production process faces three major core technical bottlenecks in the process of achieving light weight: 1. The strength contradicts the light weight, and when the wall thickness of the glass bottle is reduced to below 2.0mm, the internal pressure resistance and the impact resistance of the glass bottle are obviously reduced. For example, in a drop test of 1.5 meters in height, the breakage rate may exceed 15% and the transportation and use requirements cannot be met. 2. The molding precision is insufficient, the traditional single-section blowing process has inaccurate parameter control, so that the uniformity of the wall thickness of the bottle is poor, and the error can reach +/-0.3 mm. The uneven wall thickness is easy to cause stress concentration, so that the qualification rate of the finished products of the lightweight glass bottles is only about 75 percent. 3. The detection technology is lagged, the precision of the traditional ultrasonic thickness measurement technology is only +/-0.1 mm, the high-precision detection requirement of a light-weight thin-wall bottle (the tolerance is required to be controlled within +/-0.05 mm) cannot be met, the quality control is dependent on manual experience, and the stability is poor. Based on the above, we propose a lightweight two-stage blow molding process for glass bottles. Disclosure of Invention The invention aims at solving the problems in the prior art and provides a glass bottle light-weight double-section blowing forming process, which aims at solving the technical problems of realizing remarkable light-weight effect and improving the product percent of pass, the production efficiency and the intelligent level on the premise of ensuring the excellent structural strength of a glass bottle through an innovative bottle structural design, an accurate double-section blowing forming control and intelligent online feedback system and a special high-strength glass material. The aim of the invention can be achieved by the following technical scheme: A light-weight double-section blowing type forming process for glass bottles comprises the following steps: S1, preparing and melting raw materials, namely mixing 48-58% of quartz sand, 12-16% of sodium carbonate, 4-7% of limestone and cullet according to the weight percentage, wherein the mixing proportion of the cullet is 25-35%, simultaneously adding 1-3% of ZrO 2 as a reinforcing agent and 0.5-1.5% of Li 2 O as a fluxing agent, and heating the mixture in a tank furnace to 1500-1550 ℃ to melt into uniform glass liquid; S2, feeding and primary forming, namely cooling the glass liquid obtained in the step S1 to a proper forming temperature of 1150-1250 ℃, shearing the glass liquid into a gob with a specific weight through a feeding machine, and falling into a primary die cavity formed by a primary gas injection top die assembly, the primary die assembly and an inner space of a turnover material moving die assembly, injecting gas into the primary die assembly through the primary gas injection top die assembly, extruding the glass liquid gob downwards to enable the glass liquid gob to be stably filled downwards, and carrying out first section gas injection blowing on the primary gas injection bottom die assembly from bottom to top, wherein the primary blowing pressure P1 is dynamically regulated according to the real-time viscosity mu of the glass liquid, and satisfies the relation that P1= kln (mu) +b, wherein k and b are coefficients determined through simulation optimization based on a bottle, and P1 is maintained in a lower pressure range of 0.28-0.32MPa for primary blowing, so as to form a primary blank; s3, shaping and strengthening, namely transferring a blank body formed in the blank mold assembly into a forming mold assembly by turning over a material moving mold assembly, and performing second-stage gas injection blowing by a forming gas injection top mold assembly from top to bottom, wherein the final blowing is performed at a higher pressure of 0.48-0.52MPa, so that a glass blank clings to the forming mold assembly, and the accurate forming of a bottle body is completed; S4, annealing treatment, namely, clamping the material moving assembly, transferring the formed glass bottle to a conveying chain, conveying the glass bottle to an annealing furnace, setting a specific annealing temperature curve by adopting a low-temperature annealing process, and reducing t