Due to the poor distribution of pigment or filler, the color of plastic or pigment discoloration on the surface of plastic parts is uneven. The color unevenness varies with the phenomenon presented and the reasons are different. The uneven distribution of pigment near the feeding port is the main reason; if the color of the whole plastic part is uneven, it is caused by the bad heat stability of plastic; if the color of the fusion part is uneven, it is related to the nature of pigment.

The arrows point to the place is the plastic mold luster uneven phenomenon

Plastic mold product luster uneven phenomenon:

1、the cooling speed and nature of the rubber material makes the luster different;

2、uneven luster will appear in places where the temperature of the mold is too low;

3、the temperature of the rubber material is too low;

4、Use of excessive mold release agent;

5、the mold's surface polishing is not good;

Plastic parts luster uneven phenomenon cause analysis:

1、aluminum foil or sheet pigment, luster along the direction of material flow, no directional distribution of pigment at the feeding port, fusion part and multiple feeding ports, uneven color;

2、the pigment quality is not good;

3、The pigment is only attached to the surface of the material grain when rolling Jane stirring;

4、Plunger type injection molding machine is prone to uneven color;

5、Uneven plasticization;

6、uneven distribution of fiber filler, accumulation of exposed or plastic parts and solvent contact resin dissolution loss, fiber exposed;

7、plastic or pigment decomposition;

8、Mold surface with moisture, oil or too much mold release agent;

9、plastic and pigment mixed with foreign materials;

10、Low crystallinity or uneven wall thickness of plastic parts, which affects the transparency and causes uneven color;