The relationship between injection temperature and color deviation
The color of the molded part will change due to the change in the temperature of the melt. Usually, the temperature difference is about 10 °C, the color deviation of the injection molded parts can be seen.
Therefore, when the color of the injection molded part is not very different from the sample, it should be solved by adjusting the temperature. By adjusting the temperature of the normal injection molding temperature of the raw material by 5 to 15 ° C up and down, an obvious effect of improving the color deviation has been received.
In most cases, the temperature rises, the dark parts will become lighter, and the white parts will be yellowish. Conversely, the temperature decreases and the color becomes darker, and white is whiter. However, there are also individual colors that are opposite or elusive, such as fluorescent colors that are less elusive.
If the color deviation is too large, it is difficult to solve by adjusting the temperature. At this time, it is not too late to notify the color matching person to perform color matching, which can reduce the number of times of coloring. However, it is important to adjust the color to be used in the injection molding temperature required to produce the product. Otherwise, the color deviation will occur after the production is different from the color temperature.
Since temperature has a large influence on color, it is also necessary to pay attention to controlling the temperature during production. Once the color has been determined, the temperature range should be kept within plus or minus 5 degrees. Light color and other materials that are affected by temperature, even the temperature and time of the material should not be too high or too long, otherwise it will have an unstable effect on the color, which is still fluorescent color and purple . Therefore, if it is necessary to solve the water vapor problem for a long time, it is better to finish the color after baking.