Plastic products have been seen everywhere in our lives. In the process of molding plastics by injection molding machines, it will be found that the plastic raw materials turn yellow. What causes the raw material to turn yellow? So how to solve this problem?
The main reasons for the yellowing of plastic principles are:
1. The temperature of the baking material or injection molding is too high, and the molecular structure will be easily damaged to produce yellow light if the temperature is too high.
2. After production, the air humidity is high and oxidized, resulting in yellowing.
plastic principles Raw material yellowing solution:
In the central feeding system of the injection molding machine, a dehumidifying dryer and a thermal insulation feeding barrel are separately installed on the side of the machine, and the dehumidifying drying barrel is placed above the thermal insulation feeding barrel.
The machine is equipped with a controller to control the dehumidification drying barrel and heat preservation feeding barrel to automatically heat, feed, dehumidifying and drying the raw materials.
Moreover, both the dehumidification drying barrel and the warm feeding barrel have heat preservation function. When the heating time of the dehumidification drying barrel reaches the set time value and temperature value, the dehumidification drying barrel can drop from the set heating temperature value to the set heat preservation temperature value. No need for constant heating.
In addition, since the thermal insulation feeding tank can also be kept warm, whether the injection molding machine is not working for a long time due to maintenance of the mold or other reasons, it will not have any impact on the raw materials in the tank, avoiding the continuous heating of traditional equipment at high temperatures. The yellowing problem of raw materials caused.
As a machinery and equipment industry, Hengju pays most attention to product quality, technology, service and price. The operation of the central conveying system is to convey automatically during the conveying process. This feature makes users in other special fields also pay attention to it. In the transportation of food and pharmaceutical industries, the demand for large-scale standard central feeding system equipment will increase, and the demand for functional equipment combined with it will also increase. Highly automated conveying equipment will be welcomed in some applications!
