What are the causes of injection molding bottle quality problems of bottle blowing machine

1.Bottle mouth flash

Bottle mouth flash refers to a thin layer of bulge formed by the thread at the bottle mouth or the data at the die closure. It is usually caused by mold wear, inaccurate mold closure, excessive data injection molding and flash appearance.

2.Poor clamping

Poor clamping includes poor clamping of bottle blank and blow molding. The reason for its formation is similar to the flash at the bottle mouth, which is caused by the wear of the die.

3.Dark ring

There is residual information on the shoulder of the bottle. Think of a ring inlaid there. It is usually caused by uneven heating rotation and uneven tensile data during blow molding.

4.Impurities

There are impurities, black spots, foreign matters, non ablated particles, etc. in the bottle. The reason is usually that there is doubt about the data disposal before the injection molding of the bottle blowing machine. For example, if the mold part is clean, there will be black spots on the bottle. If the data particles are impure, there will be foreign matters and incomplete ablation. If the filter screen at the mouth of the middle distributor fails, the incompletely plasticized particles will enter the mold cavity, and then there will be non ablated particles in the bottle.

5.Color and lustre

The color question is about the colored bottle. For example, the green tea bottle is light green. At this time, we need to pay attention to whether the color is normal. The depth of color has a certain scale, which is mainly distinguished by both eyes. If the color is higher or lower than the color scale, it is abnormal color. Abnormal color is usually the abnormal operation of Color Masterbatch machine, or the abnormal rotation and mixing of screw.

6.Bottom deviation

Bottom deviation means that the injection point does not coincide with the middle of blow molding, resulting in uneven thickness near the bottle. There are many reasons. The common reasons are as follows: the first may be that the injection mold itself is not good, which makes the thickness of the injected bottle blank uneven. The second possibility is that during the heating process, the heating of the bottle blank is uneven, and the stretching time is also uneven. The third is that the stretch rod is lowered and skewed in the blow molding process.

7.Fluorescence

Fluorescence usually appears with the bottom deviation, which means that the screen wall is too thin, and some areas are white and bright when investigated under the light. This appearance becomes fluorescence. The reason of fluorescence composition is similar to bottom bias. It often appears at the bottom and shoulder of the bottle. Sometimes, when the blowing pressure is too high, it will also form fluorescence.

8.Bubble

There are bubbles inside the full-automatic bottle blowing machine. The main reason is that the dryness is not sufficient when it is dry, so that the plasticized data contains gas.

9.Other

Sometimes the bottle is white, opaque, and the reinforcing ring is upturned. Generally, the structure of these shortcomings is compared and summarized, and it is not common to outline them.