การศึกษาวิธีสร้างแม่พิมพ์และเงื่อนไขในการผลิตสำหรับการฉีดชิ้นงาน ด้วยพลาสติกพอลิเอไมด์ที่มีส่วนผสมของผงแม่เหล็กเฟอร์ไรท์ (The Study of Mold Construction and Injection Process for PA6 and Ferrite Bonded Magnet Compound Plastic Parts)

Abstract

Plastic injection process is always used for mass production process. The advantages of that process are variety of plastic material and excellent dimension control. The additive such as ferrite bonded magnet compound (FBMC) was used for increasing of plastic part magnetic property. The objectives of this research were study of mold construction process and injection condition for plastic part with ferrite bonded magnet compound. The typical part that used in this research was electronic component in motorcycle. Polyamide 6 with 85 % of ferrite bonded magnet compound was used for injection process experiment. Computer simulation software was used for analysis of plastic flow behaviour and magnetic flux density of different distances between magnetic source and mold cavity. The injection machine size 20 tons was used for injection experiment and brass also was used for mold insert construction. For the injection results, the average of magnetic flux density was 5.23 x 10³ Gauss in case of distance 10 mm. that according to simulation result. In case of cycle time increasing to compare the magnetic flux density, the results shown that the magnetic flux density reduced 0.02 x 10³ Gauss when compare with conventional condition.