Top 10 Most Common Defects In Glass Bottle Forming

 Custom glass liquor bottle manufacturer shares with you.

1. Crack

Cracks are the most common disadvantage of glass bottles. It can be very thin, and some can only be found in reflected light. Frequently, the bottleneck, neck, and shoulders are generated, and cracks are often generated on the bottle body and the bottom of the bottle.

2. Uneven thickness

This means that the glass on the glass bottle is unevenly distributed. The main reason is that the temperature of the glass gob is not uniform. The part with high temperature has low viscosity and is easy to blow thin. The part with low temperature has large resistance and thick. The temperature of the model is not uniform. The glass with a high temperature cools down slowly and is easy to blow thin. The side with a low temperature blows thick because the glass cools quickly.

3. Deformation

The gob temperature and the action temperature are too high, and the bottle ejected from the forming mold has not been completely shaped, and it often collapses and deforms. Sometimes the bottom of the bottle is still soft and will be printed with the marks of the conveyor belt, which makes the bottom of the bottle uneven.

4. Not full

If the temperature of the gob is too low or the model is too cold, the mouth, shoulders, etc. will not be full, resulting in defects such as notches, shoulders, and unclear patterns.

5. Cold slug

The uneven spots on the glass surface are called cold spots. The main cause of this defect is that the temperature of the model is too cold, which often occurs when starting production or stopping production.

6.  Protrusion

The defect that the seam of the glass Liquor bottle​ protrudes or the edge of the mouth protrudes outward. This is due to the fact that the model parts are not manufactured correctly or the installation is not consistent. The model is damaged, there is dirt on the joint surface, the frit has fallen into the initial mould before the top core is lifted too late, and a part of the glass will be pressed out or blown out of the gap.

7. Wrinkles

Wrinkles come in various shapes, some are creases, and some are very thin wrinkles. The main reason for wrinkles is that the droplets are too cold, the droplets are too long, and the droplets do not fall in the middle of the primary mould and stick to the cavity wall.

8. Surface disadvantages

The surface of the bottle can be fluffy and uneven, which is mainly caused by the surface of the mould cavity being not smooth. If the lubricant of the model is not clean or the oiled brush is too dirty, the quality of the surface of the bottle and can be reduced.

9. Bubbles

The bubbles generated during the forming process are often several large bubbles or several small bubbles concentrated together, which is different from the uniformly distributed small bubbles of the glass itself.

10. Shear mark

Due to poor shear, there are obvious traces left on the bottle and can. A material drop often has two scissors prints, and the upper scissors print is left at the bottom, which affects the appearance. The scissors below remain on the mouth of the bottle and are often the source of cracks.

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