Injection molding problem: abnormal color of plastic

author: Universe plastic

2024-03-13

In injection molding projects, to meet the color requirements of the final product, engineers usually add a certain proportion of color masterbatch particles to the plastic particles to participate in injection molding production.

However, problems such as uneven color and color mismatch of injection molded products may occur. The following is the experience shared by Universe Plastics engineers on injection color issues:

Injection molded products have uneven color

Cause:

1. The temperature of the injection molding machine is uneven.

2. The pigments in the hopper are not evenly mixed.

3. The mold flow channel is poorly designed.

4. The injection pressure is unstable.

Solution:

1. Adjust the temperature and pressure of the injection molding machine.

2. Ensure that the pigment is fully mixed and evenly injected into the mold.

3. Check and optimize mold design.

4. Clean and maintain equipment regularly.

Injection molding products in different colors

Injection molded products have color deviations

Cause:

1. Use different batches of paint.

2. Pigment aging.

3. Changes in ambient temperature and humidity.

Solution:

1. Ensure stable pigment sources and unified batch production.

2. Regularly inspect color standards and paint quality.

3. Control the temperature and humidity of the production environment.

The color of injection molded products changes

Cause:

1. Pigments deteriorate or decompose under high temperature conditions.

2. The pigment addition ratio is inaccurate.

Solution:

1. Ensure that the pigments are stored in good conditions and avoid moisture or overheating of the pigments.

2. Add pigments in strict accordance with the formula, and adjust injection molding process parameters if necessary.

The color of injection molded products is unstable

Cause:

1. The pigment has poor heat resistance.

2. The environment changes greatly during the production process.

3. Improper operation of the injection molding machine.

Solution:

1. Choose pigments with good heat resistance.

2. Stable production environment. Train operators to ensure operating specifications and process stability.

The color of the injection molded product is not as expected

Cause:

1. There are differences between the color samples provided by the pigment supplier and the actual production colors.

2. The injection molding machine settings are incorrect.

Solution:

1. Confirm the color samples provided by the pigment supplier and conduct sample confirmation before actual production.

2. Adjust and optimize injection molding machine parameters in a timely manner.

Summarize

In injection molding production, when encountering the above color problems, it is necessary to analyze all aspects of the production process and strictly control the raw material quality, color masterbatch ratio, injection molding process parameters and injection molding production environment. Only meticulous management and adjustment can ensure the stability and consistency of the final product color.

Dongguan Universe Plastic Factory has more than 15 years of injection molding production experience. It has a professional team and high-quality and stable material suppliers. It can achieve different color effects of plastics beyond customer expectations, making them fuller, more lustrous, richer and textured.

If you are looking for a professional injection molding manufacturer, please contact us to get the latest service prices.

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