(1) Crack cracking is the most common shortcoming of glass bottles. It can be very fine, and some can only be found in reflected light. Frequently produced parts are bottle necks, bottle necks and shoulders, and cracks often occur at the bottom of bottles and bottles.
(2) Thickness and unevenness 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 is low in viscosity, and it is easy to blow thin; the parts with low temperature have large resistance and are thicker. The temperature of the model is not uniform. The glass on the high temperature side is cooled slowly, and it is easy to blow thin. On the low temperature side, the glass cools quickly and blows thick.
(3) The temperature and the working temperature of the deformed gob are too high, and the bottles removed from the forming mold are not yet fully set and tend to collapse and deform. Sometimes the bottom of the bottle is still soft and the belt marks are printed to make the bottom of the bottle uneven.
(4) Insufficiently low temperature of the material droplets or overcooling of the model will result in insufficient blowout of the mouth, shoulders, etc., resulting in defects such as notches, shoulders, and unclear patterns.
(5) Non-smooth patches on the surface of cold spot glass are called cold spots. The main reason for this defect is that the temperature of the model is too cold, and it mostly occurs when the production is started or the production is stopped.
(6) Prominent glass bottle joint line protruding or protruding from the edge of the mouth of the defect. This is due to the fact that the model parts are not manufactured correctly or are not properly assembled. The model is damaged, there is dirt on the joint surface, and when the top core is lifted too late to enter the position, the glass material has fallen into the primary mold, and part of the glass will be pressed out or blown out from the gap.
(7) Wrinkles and wrinkles have various shapes, some are creases, and some are fine wrinkles. The cause of wrinkles is mainly due to the fact that the gob is too cold, the gobs are too long, and the gobs do not fall in the middle of the primary die but stick to the walls of the die cavity.
(8) Surface Disadvantages The surface of the jar is hairy and uneven, mainly due to the fact that the mold cavity is not smooth. If the model's oil is not clean or the oiled brush is dirty, the surface quality of the bottle can also be reduced.
(9) Bubbles generated during bubble formation are often several large bubbles or small bubbles that are grouped together. This is different from the uniform distribution of small bubbles in the glass itself.
(10) Marks on the scissors show signs of remaining on the bottle due to poor shearing. One gob is often printed with two scissors, and the upper scissors remain at the bottom, affecting the appearance. The following scissors are printed on the bottle mouth, often the origin of cracks
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