Analyzing the production relationship between rotational molding processing temperature and rotational molding packaging boxes
Rotational molding products exist in many fields. The appearance of these rotational molding products seems different from that of ordinary plastic processing products. Temperature is indispensable to the polyethylene rotational molding process. As an example, the polyethylene rotational molding process has a special appearance: the powder melting process prevents the formation of foam between air particles, and then foam disappears through continuous heating.
Rotational molding processing
Further research shows that these foam are not due to the downward buoyancy effect of their free surface melting, but because the bubbles gradually fuse in the plastic melt in the air and melt. Therefore, it is of great significance to improve the quality of foam polyethylene products by scientifically controlling the heating process of polyethylene roll forming machines. Due to the long rotation of heating time, especially the wall thickness, it can last for half an hour to one hour or more.
The measures taken by the rolling mold manufacturer are usually intended to avoid the use of polyethylene plastic antioxidants during the heating process of thermal oxidation and information function. However, when polyethylene materials are heated to high temperatures or for too long, oxidation and oxidation resistance cannot avoid data. When the heating time for thickness is longer, it is necessary to reduce the heating temperature. If you use a gradual temperature and shorten the heating time, there will be air bubbles and foam can not be seen.
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