The Top 10 Common Defects of Glass Bottle During Production

Cracks in Glass Bottle

Cracks are the most common defect in olive oil bottles, essential oil bottles, and glass bottles. They can be very fine, and some can only be seen in reflected light. Cracks often occur at the mouth, neck, shoulder, body, and bottom of the bottle.

Uneven Thickness in Glass Bottle

This refers to the uneven distribution of glass on olive oil bottles, essential oil bottles, and glass bottles. It is mainly caused by uneven glass drips, with higher temperature parts having less viscosity and thus easier to blow thin, while lower temperature parts have higher resistance and are thicker. When the model temperature is uneven, the glass cools slower on the hotter side, making it easier to inflate, while on the cooler side, the glass cools faster and is thicker.

Deformation of Glass Bottle

When the drip temperature and process temperature are too high, bottles that have not completely hardened when they are removed from the shaping mold may collapse or deform. Sometimes, the bottom of the glass container bottles is still soft and will be marked with the conveyor belt, making the bottom of the glass container bottles uneven.

Insufficient Fullness of Glass Bottle

If the temperature of the drip is too low or the model is too cold, the mouth, shoulder, and other areas may not be fully inflated, resulting in defects such as not being full, collapsed shoulders, and unclear patterns.

Cold Spots in Glass Bottle

Irregularities on the surface of the glass are called cold spots. The main cause of this defect is that the model temperature is too cold and it often happens when production starts or resumes after a shutdown.

Protrusions on Glass Bottle

Defects where bottle seam lines protrude or the edges of the mouth protrude outwards. This is only caused by incorrect modeling or misalignment during installation. Damage to the model, dirt on the seam line, and the top core being lifted too late and not entering the correct position can cause glass to be squeezed or blown out from the gap.

Wrinkles in Glass Bottle

Wrinkles can take various shapes, some are creases, while others are fine and patchy. The main cause is that the drip is too cold, too long, or does not fall in the middle of the initial model and sticks to the walls of the mold.

Surface Defects in Glass Bottle

The surface of the glass container bottles is rough and uneven, mainly because the surface of the mold cavity is not smooth, or the lubricating oil of the model is not clean, or the brush used to apply the oil is too dirty, which affects the quality of the glass bottle surface.

Bubbles in Glass Bottle

Bubbles produced during the forming process are often several large bubbles or several small bubbles clustered together, which is different from the uniformly distributed small bubbles in the glass itself.

Scissors Marks on Glass Bottle

Obvious marks left on the bottle due to poorly cut glass. One drip can have two scissor marks, with the top one leaving a mark on the bottom, affecting the appearance, while the bottom one leaves a mark on the mouth and is often the origin of cracks in the glass container bottles.