What to do if there is white fog in injection molding of high-gloss products

What should I do if there is white fog in the injection molding of high-gloss products? High-gloss products have strict requirements on appearance and cannot hide any defects. Even the dust in the air in the workshop may cause plastic parts to be defective to varying degrees, so it becomes more difficult to operate in injection molding. of a product. During the injection molding process of this high-gloss product, there may be adverse problems due to various reasons, and white fog is a very common situation. So, what should I do if there is white fog in the injection molding process of high-gloss products?

White mist is actually a manifestation of poor air trapping. During the injection molding process, there will be a certain gap between the plastic and the plastic during the blanking stage. The gap before the plastic is compressed into the melt to form gas. If the gas is not discharged from the outside of the barrel before injection molding, it will be injected into the mold cavity together with the molten material. If the mold is not exhausted well, similar white fog or burning will easily occur.

Different from white mist, scorching is the local combustion caused by the release of compressed gas under high pressure, and the temperature can reach 600~800°C during combustion. When white fog occurs, it cannot be solved simply by opening the exhaust slots, and specific problems need to be analyzed in detail. If the venting groove of the mold is too large or the position is wrong, not only the venting cannot be performed correctly, but also defects such as shattering may occur.

What should I do if there is white fog in the injection molding of high-gloss products? Shanghai Mulan Injection Molding Factory suggests that appropriate adjustments can be made from the injection molding process and operating methods. For example, reducing the screw rotation speed can make the melt temperature uniform and reduce the possibility of air entrainment; by increasing the mold temperature, high pressure and slow filling; reducing the injection speed, increasing the clamping force, and assisting the exhaust of the cavity surface.

The above is the solution proposed by Shanghai Mulan Injection Molding Factory on 'What should I do if there is white fog in the injection molding of high-gloss products?' If you have encountered similar problems in injection molding processing, or still have other injection molding related problems, Welcome to visit the official website for more information, or pick up the phone to contact us directly!

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