Top 10 factors affecting the quality of glass bottles

(Last Updated On: 2021年12月24日)

To produce a high-quality glass bottle in a glass factory is determined by the following 10 factors.We are one of the largest Chinese glass bottle manufacturers,We have strict requirements on the quality of glass bottles,Our standards for quality are higher than the standards of China’s glass bottle industry.Below we conduct a brief analysis of 10 factors.

1. Glass bottle mould

The quality of the glass bottle mold plays a key role in the bottle produced. The mold material, mold design and processing technology determine the quality of the mold. The glass bottle mold is divided into seven parts: the first mold, the finished mold, Funnel, bulkhead, die, pump head, punch and core.

2. Raw materials for glass bottles production

The choice of raw materials affects the quality of the glass bottles. The raw materials for the production of glass bottles mainly include quartz sand, soda ash, limestone, feldspar, borax, lead and barium compounds, etc., and need to add 20%-30% of cullet. To promote the integration of various raw materials in the furnace, the use of cullet can increase the utilization rate of recycled glass, save energy, protect the environment, and reduce carbon emissions.

3. The ratio of glass bottle raw materials

The production of glass bottles requires 7-12 different compounds to be fused in a high-temperature furnace. This ratio is involved here. A superior ratio can result in a more stable glass bottle. The glass bottle produced by misapack is impact resistant. , Internal pressure resistance and chemical stability are relatively superior, and the technical requirements are much higher than China’s national standards.

4. Melting temperature

The mixed raw materials are heated at a high temperature (1550~1600 degrees) in a pool furnace to form a uniform, bubble-free liquid glass that meets the molding requirements.

5. Molding temperature

After the glass bottle melts, it becomes liquid glass. It passes through the conveying channel. The temperature of the conveying channel must be controlled at about 1300 degrees, and then sent to the molding workshop. The glass temperature during molding is 600 degrees.

6. Production speed

In the production of glass bottles, bottles of different weights and shapes have different production speeds. The appropriate production speed affects the quality of glass bottles.

7. Temperature control of annealing furnace

After the glass bottle is produced, it needs to go through an annealing furnace so that the internal stress of the glass bottle can reach a balance. Generally, the annealing furnace is about 37.5 meters, the annealing time is about 2 hours, and the temperature is between 500 degrees Celsius and 600 degrees Celsius. Annealing Control will seriously affect the quality of glass bottles

8. Cold and hot spraying

The spraying on the hot and cold ends has an important effect on the strength of the glass and the wear resistance of the surface. The hot end spraying can enhance the strength of the glass bottle, and the cold end spraying can enhance the wear resistance of the glass bottle surface.

9. Machine inspection

After the glass bottles are produced, we will conduct manual inspection and machine inspection. The machine inspection can pick up many invisible to the naked eye, such as cracks in the bottle mouth and bottom, and some dense small bubbles on the bottle. For easily found unqualified products, the quality requirements of misa glass are higher and more stringent than industry standards. Our testing equipment includes 12-angle camera photography equipment and mouth crack detection equipment to ensure that every bottle that leaves the factory is qualified.

10. Packaging

Since our bottles need to be transported over long distances after they are produced, and the combination of sea and land transportation, there are too many unpredictable factors, so we need to make different packaging and choices for different bottle types or different requirements of customers. Perfect packaging allows the glass bottles we produce to be delivered to your factory safely. Misa has a variety of options for packaging, as shown in the figure below.