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How to optimize the color difference of electronic product shell?

 Friday, 24 September 2021

The shell of electronic products shall be beautiful, without burr, scratch and color difference.

1.Solve the influence of injection molding machine and mold elements .
Choose an injection molding machine with the same processing capacity as the injection molding machine. If the injection molding machine has problems such as material dead corner, it is better to replace the equipment. The causes of color difference such as mold gating system and exhaust slot can be solved by maintaining the mold of the corresponding part. We must solve the problems of equipment and molds before we can organize production and reduce the complexity of the problem.

2. Solve the influence of raw resin and color masterbatch
In the case of producing light color products, the influence of the difference of raw resin on the color change of products cannot be ignored.

3. Address the impact of uneven mixing
If the injection molding materials and color masterbatch are not mixed well, the color of the product will be changeable. After evenly mixed with the color masterbatch machine, the lower suction material is sent to the hopper. Under the action of static electricity, the color masterbatch is separated from the hopper, which is easy to be adsorbed on the hopper wall, and the amount of color masterbatch in the injection cycle changes, resulting in color difference. Jinan injection molding

4. Reduce the influence of adjustment in injection molding process
If the injection molding process parameters need to be adjusted for reasons other than color difference, if the injection temperature, back pressure, injection cycle and the addition amount of color masterbatch are not changed as much as possible, the influence of the change of process parameters on color difference must also be observed.
Try to avoid the injection process with strong shear caused by high injection speed and high back pressure, so as to avoid the color difference caused by local overheating and greed. Strictly control the temperature of each heating part of the cylinder, especially the nozzle and the heating part close to the nozzle.

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