Traces on the surface of injection molded products

Linear traces on the surface of plastic parts are formed by the plastics coming together in the mold, and the melts are not completely fused together at their intersections, and they cannot melt into each other, resulting in welding lines, which usually appear as a straight line. It develops from deep to shallow, and this phenomenon has a certain impact on the appearance and mechanical properties. Such as the weld marks on the bottom of the hook plate.