ABS shiny surface

How to make the ABS parts surface more shiny

1、 Injection mold

1. If the mold cavity is poorly processed, such as scars, micropores, wear, roughness and other deficiencies, it is bound to be reflected on the plastic parts and make the plastic parts have poor luster. For this, the mold should be carefully processed to make the surface of the cavity have small roughness, and chrome plating can be polished if necessary.

2. If there are oil and water stains on the surface of the cavity, or too much release agent will make the surface of the plastic part dark and dull. For this, remove the oil and water stains in time and use the release agent in limited amount.

3. If the demoulding slope of the plastic part is too small, it is difficult to demould, or the force is too large during demoulding, which makes the surface luster of the plastic part * good, for this, increase the demoulding slope.

4. If the mold exhaust is poor and too much gas stays in the model, it will also lead to poor gloss. For this, check and correct the mold exhaust system.

5. If the cross-sectional area of the gate or runner is too small or changes suddenly, and the melt flows in a turbulent dynamic flow due to too large shear force, resulting in poor gloss, the cross-sectional area of the gate and runner shall be increased appropriately.

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2、 Injection molding process

1. If the injection speed is too small, the surface of plastic parts is not dense and shows poor gloss, the injection speed can be appropriately increased.

2. For thick wall plastic parts, if the cooling is not sufficient, the surface will be hairy and the luster will be dark. For this, the cooling system should be improved.

3. If the holding pressure is insufficient and the holding time is too short, resulting in insufficient density and poor gloss of plastic parts, the holding pressure and holding time shall be increased.

5. If the melt temperature is too low, resulting in poor fluidity and poor gloss, the melt temperature shall be appropriately increased.

6. For plastic parts made of crystalline resin, such as PE, PP, POM, etc., uneven cooling will lead to poor gloss. Therefore, the cooling system should be improved to make it cool evenly.

7. If the injection speed is too high and the gate cross-sectional area is too small, it will be dark and poor gloss near the pouring product. For this, the injection speed can be appropriately reduced and the gate cross-sectional area can be increased