EFFECT OF FERRITE COMPOSITED IN POLYAMIDE6 ON THE MAGNATIC FIELD OF INDUCTIVE SPECIMEN PREPARED BY INJECTION MOLDING PROCESS

บทคัดย่อ

The aims of this research are to design and make a plastic injection mold for manufacturing a plastic magnet. The dimension of a workpiece was created on a scale of 5 × 11 × 2 mm. Mold making was firstly designed by CATIA software before subjecting to computer numerical control (CNC) milling machine. To clarify an effect of ferrite content on the magnetic field of composites, quantity of ferrite in the polyamide 6 matrixes was diluted from 85 to 20%. Polymer composite was mixed on a two rolls mill machine at 220ºC for 20 min. To activate the ferrite in a polymer matrix, workpiece was injected in a special mold which was attached with a part of magnet. Gauss meter proved that magnetic field of the workpiece suddenly decreased with the major reduction of ferrite composition. In addition, density, Shore D hardness, tensile properties and impact strength of the composites were also reported.