The appearance quality control requirements of electroplating injection molding parts

Raw materials must be fully dried according to the requirements of the process, can not have water, otherwise the surface will be injected after the injection of silver pattern

II injection temperature, pressure, time, etc. in accordance with the process parameters of card, the injection speed should be strictly controlled, too fast injection speed will lead to difference (plating parts injection speed is controlled in 15% - 35% between coating and substrate adhesion)

In the process of injection molding, mold release agent can not be used, especially the release agent containing silicone oil, otherwise it will affect the adhesion of the coating;

Should the middle discharging after shutdown, avoid raw material in the screw due to long residence time degradation caused by brittle plastic products;

Not polishing and grinding surface parts by injection molding, so as not to affect the adhesion between the coating and the substrate;

The operator in the injection molding process, must take the cotton clean gloves, to avoid the product surface after injection molding is polluted;

The internal force control: products do not allow the existence of larger internal stress. After injection molding should stress testing (using acetic acid soaking method) [parts immersed in thick glacial acetic acid for 1-2 minutes, out to wash with water, then to observe the surface of any white]

Surface quality inspection requirements

The surface should be smooth, uniform color, no lack of material, material clamping, deformation, cracking, layered discoloration, no pitting on the surface, the shrinkage deflated, flow mark, crazing, oil stain, scratches, weldline is less than the limit sample. When the test is taken, we must bring clean cotton gloves.

Appearance quality requirements

Appearance quality and sealed sample, end position to avoid sharp edges, flash, repair leftover crumbs; smooth edge, no gap, volume of export; foot assembly without deformation and lack of material, fracture,; side of the assembly hole Wufei and gap defect. When you have to take a clean cotton gloves, avoid dirty parts surface