Transparent plastic parts processing for a variety of reasons due to defects in the processing of plastic parts. Here we come together to understand the defects under those there are those. Precision plastic parts processing
Crazing: by the filling and condensation process, the impact of internal stress anisotropy, the vertical direction of the stress, so that the resin flow on the orientation, and non-flow orientation to produce different refractive index and flash pattern, when its expansion , May cause the product to crack. Except in the injection molding process and mold attention.
Bubble: Mainly in the resin within the water vapor and other gas row does not go out, (in the mold condensation process) or due to insufficient filling, condensation surface and too fast condensation and the formation of "vacuum bubble."
Surface gloss difference: the main roughness of the mold, on the other hand condensation too early, so that the resin can not copy the surface of the mold state, all of these are made on the surface of small cattle rugged, leaving the product lust.
Seismic pattern is the dense ripple formed from the straight gate as the center. The reason is that the melt viscosity is too large, the front material has been condensed in the cavity, and the material is broken through the condensation surface.
Whitening: fog halo: mainly due to dust in the air into the raw materials or raw materials caused by too much water content. Precision plastic parts processing
White smoke: black spots: mainly due to plastic in the barrel, due to local overheating and the barrel resin decomposition or deterioration caused by the formation. |
