What causes uneven color in injection molding

When we do injection molding, we often have defects in plastic products due to some inattention, which affects the efficiency of injection molding.

Below, we will simply analyze the problem of uneven color processing under the injection molding process.

In the process of injection molding, in order to make the plastic parts have more abundant colors, we will add appropriate amount of coloring materials to the raw materials. However, for one reason or another, color unevenness will occur.
So, what are the reasons for the uneven color of injection molding?

1. The colorant diffuses poorly, which often causes a pattern to appear near the gate.

2. The plastic or colorant has poor thermal stability. To stabilize the color tone of the part, it is necessary to strictly fix the production conditions, especially the material temperature, the amount of material and the production cycle.

3. For crystalline plastics, try to make the cooling speed of each part of the parts consistent. For parts with large wall thickness difference, coloring agent can be used to mask the color difference. For the parts with uniform wall thickness, the temperature and mold temperature should be fixed.

4. the shape of the parts and the form of the gate, the position has an impact on the plastic filling situation, so that some parts of the part produce chromatic aberration, if necessary, to be modified.

When in the process of injection molding, if you can control the above four points well, you can control the color of the plastic well, greatly reducing the chance of chromatic aberration.

About JasonMould Industrial Company Limited

Jasonmould is a China mold maker of plastic molds- injection mold, die casting moulds, plastic blow molding, rotational molding, medical plastic injection molding, two shot plastic injection molding, insert molding, overmolding, metal injection molding, micro injection molding, powder injection molding, ceramic injection molding, liquid injection molding, husky injection molding, household mold, casting mold, die mold tool, custom molds, china moulds, rapid prototyping tooling, plastic prototyping tooling, punch press tooling, die and tooling for mobile/ cell phone parts, automotive parts, vacuum cleaners, rechargeable tools, telephones, copiers, computers, multimedia speakers, and many other electronic products and household appliances. And also a plastic product manufacturer, mold manufacturer China– plastic parts, plastic water tank, plastic balls, plastic containers, plastic buckle, plastic anchor, plastic hanger, plastic spoon, plastic pipe fitting, plastic tumble, plastic tableware, plastic cups, plastic bottles, plastic tray, plastic cosmetic container, plastic case, plastic food container, plastic chairs, plastic caps, plastic cap closure, plastic tubes, plastic water pipes, plastic knobs, plastic tubing, plastic utility boxes, plastic racks and so on.

Person: James Yuan
Company: JasonMould Industrial Company Limited
Add:  LongGang Village,LongXi Town,BoLuo County,HuiZhou City,GuangDong Province, China
Tel: 86-752-6682869
Email: [email protected]

Site: https://www.jasonmolding.com/custom-injection-molding/

Share this post