What are the common quality problems of automatic hydraulic blow molding machine

　　Common quality problems and causes of automatic hydraulic blow molding machine:

　　 1.1 Bottle mouth flash

　　Bottle mouth flashing means that there is a thin layer of bulge on the thread or mold closure at the bottle mouth. Generally, the mold wear is caused by inaccurate mold closure, which constitutes too much material for injection molding, and flashing occurs.

　　1.2 Poor clamping

　　 poor mold clamping includes poor clamping of preforms and poor blow molding. The reason for its composition is similar to that of the flash on the bottle mouth, which is caused by the wear of the mold.

　　1.3 Dark ring

　　 There is leftover material on the shoulder of the bottle, so I want to put a ring there. The reason for its composition is generally because the heating rotation is not uniform, and the stretched material is not uniformly formed during blow molding.

　　1.4 There are impurities

　　There are impurities, black spots, foreign objects, unmelted particles, etc. in the bottle. The cause is generally a problem with material handling before injection. For example, if the mold is clean, there will be black spots on the bottle. The impure particles of the material will cause foreign matter to be present and incomplete melting. The failure of the filter at the mouth of the center distributor will result in incompletely plasticized particles entering the cavity and then making the bottle inside. There are unmelted particles.

　　1.5 Color

　　The color problem is for colored bottles, such as green tea bottles are light green. At this time, you need to pay attention to whether the color is normal. The shade of color has a certain design, mainly relying on the eyes to distinguish. Designs with color higher or lower than color are all color abnormalities. The color abnormality is generally the malfunction of the masterbatch machine, or the malfunction of the screw rotation and mixing.

　　 1.6 Bottom deviation

　　 bottom deviation means that the injection point does not coincide with the blow molding center, which makes the thickness around the bottle uneven. There are many reasons. The common reasons are as follows: The main reason is that the injection mold itself is not good enough, which makes the thickness of the injection molded preforms uneven. The second possibility is that the preform is not uniformly heated during the heating process, and the composition is not uniform during stretching. The third is that the stretching rod is skewed when it drops during the blow molding process.

　　1.7 Fluorescence

　　 Fluorescence generally appears with the bottom deviation, which means that the screen wall is too thin to query under the light, and the local area is white and shiny. This phenomenon is called fluorescence. The cause of fluorescence is similar to the bottom bias. It often appears at the bottom and shoulders of the bottle, and sometimes it will cause fluorescence when the blowing pressure is too high.

　　1.8 Bubbles

　　 There are bubbles inside the bottle. The main cause is insufficient drying during drying, so that the plasticized material contains gas.

　　1.9 Others

　　 Sometimes the bottle will turn white, opaque, and the reinforcing ring may turn up. Generally, the composition of these shortcomings is relatively general and not common. Outline.