Fengy - 20+ years wire manufacturing experience,OEM/ODM cables and wiring harnesses.
The first is the choice of the extrusion method of the mold. For the extrusion of low-smoke and halogen-free cable materials, the extrusion-molding mold should be extruded, and the semi-extrusion should be used in the process of jacket extrusion, so as to fully ensure the tensile strength and elongation of the material. Rate and surface finish.
Secondly, the choice of the mold sleeve. When using the extrusion mold, the pressure of the machine head is large due to the high viscosity of the material. When the extrusion leaves the mold, it will expand, so the mold sleeve should be smaller than the actual size. .
Finally, the mechanical properties of low-smoke and halogen-free are superior to those of ordinary cable materials and low-smoke and low-halogen materials. The stretch ratio is small, only about 2.5 to 3.2, so the stretching should be fully considered when selecting the mold. Performance, which requires the selection of the mold sleeve not to be too large, otherwise the surface of the cable is not dense.