Discussion on Experience——Analysis and Countermeasures of Appearance Problems

　　As a BOPA PE Pipes Film Supplier, there is a message you would like to share with everyone. The main problems of appearance: gas, flower, burnt, mixed color, black spots, lack of glue, drag, white, and front.

　　Knowing the cause of poor appearance, you can prescribe the right medicine. It will also be different for reasons such as experience. This is the case, it is diarrhea, it is clearly caused by the cold, some doctors are treated as eating the wrong things, the result is more pull, and then the cold and cold, the result is once good, it has become more than two. Then go back to the topic, the appearance is bad, first of all to figure out how it came. It is necessary to exert our imagination, and the same is true for the adjustment. Imagination is very important.

　　How does a granule of rubber become a variety of products? What is the process like? We can think of the process of injection molding as a flowing river water. There are sharp turns in the river, there are diversions, and there are stones of different sizes and sizes to block the way. In such an environment, there will be water splashes and vortexes. This metaphor is similar to the flow of material in the mold. So knowing how it flows, it's easy to find out why. Our company supplies PE Plastic Core.
                                                                                                                                                                                                                                           
                                                                                                                                              PE Plastic Core

　　But there is a significant difference in the flow of material in the mold, which is laminar flow. Maybe there is water, but I can't observe it. Because the material is molten at high temperature, the mold is low temperature, and the highest is more than 100 degrees. There is a temperature difference between them. Because of the coldness near the cavity wall, the fluidity will be worse and the flow will be slower. The material has a high temperature and good fluidity, so the middle flow first. The flow first must not be empty on both sides, it is necessary to add to both sides, because there are constantly adding materials in the back, pushing the front end forward, it will form the front end and continue to add to both sides, forming a flower-like front end, which is the layer.

　　It is necessary to understand the formation principle of laminar flow, which is also the basis of the adjustment. During the flow, the materials on both sides are almost cold when they touch the mold wall, and they are fixed and do not flow with the material. So we can find the location of the bad points, control the speed of the material flow here, so that a lot of poor appearance can be solved.

　　The lower the mold temperature, the faster the material is cooled, so the mold grain cannot be restored very well. Therefore, it is a good method to reduce the appearance of the mold and add mold temperature.

　　Reasons for appearance production:

　　Flower, gas, burnt: the material has moisture or the speed of the injection process is set to irrational production of turbulent flow, the moisture is the flower, the moisture is the gas, the material has moisture or the injection process is mixed with air and can not be discharged.

　　Of course, there are many reasons for flowering. The flower expressions of different reasons are different. For example, there is no dry material, it is a large piece, or irregular, and there is a form of expression, which is radial around the nozzle. We imagine A bottle of water, put a little soap bubble inside, are they all squeezed in the bottle? Then the material can be imagined in the barrel. The material is compressed inside, the water runs to the ends, and the shot is the same as the water in the bottle. There is also a bone, corner, and water can flow through some deep pits. Or where the big stones are, the water will flow too fast, and there will definitely be whirlpools or splashes of water. The main method of improvement is to reduce the suitable speed of the position. Our company also has PP Tube Core, welcome everyone to come to consult.