Plastic parts color custom injection molding

author: Universe plastic

2024-01-18

Color customization of injection molded plastic parts is a complex process, which requires professional injection molding engineers to select appropriate colorants, determine the concentration and dosage of colorants, and control parameters such as temperature and pressure during the injection molding process.

How to change plastic color

How to change the color of plastic during the plastic manufacturing process? Here are some specific steps:

1、Choose the right colorant：

Depending on the chosen material and potential effects, you'll need to choose between liquid and solid colorants. Liquid colorants are perfect for translucent and translucent effects. The effect is adjustable by controlling the concentration and amount of colorant. Liquid colorants ensure a luminous effect and are best suited for PVC and PET plastics.

2、Determine the concentration and amount of colorant：

This is a critical step because the concentration and amount of colorant will directly affect the final color result. You need to determine the optimal concentration and dosage based on the actual situation, such as the color requirements of the product, the nature of the colorant, etc.

3、Controlling parameters during the injection molding process：

Parameters such as temperature and pressure during the injection molding process will affect the color of the product. For example, if the temperature is too high or the pressure is too high, uneven color may result. Therefore, during the injection molding process, these parameters need to be strictly controlled to ensure product color consistency.

4、Choose the right colorant type：

There are several types of colorants available, including composite colors, masterbatches, solvent colorants, and dry pigment mixes, among others. Each colorant has its own characteristics and scope of application, and you need to choose according to your actual needs.

5、Pay attention to color consistency：

While you may not have complete control over every detail of plastic color, you can take steps to maximize color consistency, such as choosing standardized colors and controlling the concentration and amount of colorants.

What are the factors that affect the color of injection molded parts?

During the injection molding process, the impact on the color of plastic parts is mainly reflected in the following aspects:

1、Effect of injection molding temperature on color of injection molded parts：

Temperature is an important factor affecting the color of plastics. When the temperature is too high or too low, the toner or masterbatch in the raw material will respond differently depending on the material. When the temperature is too high, the color is dispersed, the effect of the toner is reduced, and the color becomes lighter. If the temperature is too high, it may be burned. When the temperature is too low, the dispersibility of the toner may become poor and the color may become lighter or black.

2、Influence of injection molding pressure on color of plastic parts：

Pressure has an impact on the unit weight of the product, as well as the surface finish and wind quality, but the impact on the color is mainly reflected in the fact that when the pressure is too high, the color may become fuller.

3、Comprehensive influence of injection molding temperature and pressure：

During the injection molding process, the combined effects of temperature and pressure also need to be considered.

When the pressure is too low, the screw retreats too fast, and the density of the melt flowing into the front end of the barrel is small, which may cause shrinkage, air blooms, cold streaks, uneven gloss and other undesirable phenomena on the surface of the product.

4、Effect of Injection Molding Temperature and Pressure on Specific Colors：

For some special colors, the effects of temperature and pressure may be different. For example, for the injection molding of thermochromic color powder, the suitable injection molding temperature is 160-180 degrees. If the temperature is too high, the toner will be easily burned out.

Customized high quality plastic color factory

Finally, injection molding plastic color customization is a process that requires professional knowledge and experience. If you are not familiar with it, you may need to find a professional injection molding manufacturer or service provider to help you complete it.

Moreover, the temperature and pressure during the injection molding process are also important factors that affect the color of plastic parts and need to be adjusted according to the specific material and product characteristics.

In the Universe Plastics factory, which specializes in injection molding, strict quality control and monitoring of the production process are carried out in order to ensure the consistency of product color.

Injection molding plastic material: TPE

A Comprehensive Guide to Plastic Design