{"id":6449,"date":"2021-07-08T08:03:44","date_gmt":"2021-07-08T08:03:44","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=6449"},"modified":"2021-07-08T08:03:44","modified_gmt":"2021-07-08T08:03:44","slug":"gap-in-nozzle-and-roller","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/gap-in-nozzle-and-roller\/","title":{"rendered":"Jarak antara Nozzle dan Roller"},"content":{"rendered":"

Ukuran celah antara nosel dan rol memiliki pengaruh yang besar terhadap munculnya garis-garis memanjang.<\/p>\n

Dalam proses produksi normal, akibat kesalahan perakitan nozzle atau kualitas nozzle yang buruk, celah antara nozzle dan rol menjadi terlalu sempit atau tidak merata di beberapa bagian. Serbuk yang digiling oleh nozzle setelah melewati rol dan nozel pengecoran<\/a> berkontak, dan inklusi seperti terak aluminium selama proses pengecoran dan penggulungan akan menumpuk di ujung luar nosel. Saat cairan aluminium mengalir melaluinya, kondisi kristalisasi di sini berbeda dengan di tempat lain. Terdapat perbedaan yang jelas dalam kondisi kristalisasi. Pada permukaan gulungan hasil pengecoran dan penggulungan, terbentuk perbedaan struktur yang jelas akibat kondisi kristalisasi yang berbeda. Jika perbedaan ini parah, akan timbul cacat pada batang pembersih. Jika hanya sedikit, akan muncul garis-garis vertikal.<\/p>\n

Setelah garis-garis memanjang terbentuk, garis-garis tersebut akan tercetak pada posisi yang sama di gulungan, dan secara bertahap membentuk strip aluminium kecil yang lengket dan tidak rata di sepanjang keliling gulungan. Karena adanya interaksi antara gulungan dan gulungan baja cor-gulung, sulit untuk menghilangkan garis-garis memanjang tersebut secara langsung dalam proses produksi. Terkadang garis-garis tersebut membentang sepanjang seluruh panjang gulungan.<\/p>\n

\"Jarak<\/p>\n

Dengan menyesuaikan parameter proses lainnya, celah antara nosel dan rol diperbesar sebesar 0,1 mm.<\/p>\n

Pengujian tersebut membuktikan bahwa hampir tidak ada garis-garis pada permukaan billet cor-gulung, garis-garis memanjang telah terkendali dengan baik, dan kualitas permukaan billet telah meningkat secara signifikan. Namun, ketika celah antara rol nozel terlalu lebar, lapisan oksida di celah tersebut mudah pecah dan tergulung ke permukaan billet, sehingga menimbulkan cacat lipatan pada lapisan oksida. Dalam kasus yang parah, lapisan oksida dapat pecah dan menyebabkan kebocoran aluminium; oleh karena itu, berhati-hatilah saat memperlebar celah antara rol nozel.<\/p>\n

Ciri-ciri permukaan garis-garis memanjang merupakan cacat yang membentang sepanjang seluruh panjang lembaran yang dicetak dan digulung. Garis-garis memanjang tersebut berupa pita-pita yang cerah, terkadang cukup dalam. Garis-garis memanjang ini akan membentuk garis yang sejajar dalam arah melingkar pada permukaan rol pengecoran, yang harus dipoles dengan amplas selama proses produksi. Garis-garis memanjang tidak dapat dihilangkan dari permukaan foil. Jika garis-garis memanjang tersebut parah, akan muncul garis-garis terang dan gelap pada permukaan foil, yang secara serius memengaruhi kualitas permukaan dan kualitas produk foil.<\/p>\n

Dengan memperlebar jarak antara rol pengecoran dan nosel pengecoran, serta mengoptimalkan pola aliran nosel, garis-garis memanjang pada permukaan lembaran yang dicor dan digulung dapat dikurangi atau dihilangkan.<\/p>","protected":false},"excerpt":{"rendered":"

The size of gap in nozzle and roller has a great influence on the longitudinal streaks. In normal production, due to the assembly error of the nozzle or the poor quality of the nozzle, the gap in nozzle and roller is too small or partially uneven. The powders ground by the nozzle after the roll […]<\/p>\n","protected":false},"author":1,"featured_media":6450,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-6449","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nGap in Nozzle and Roller, Aluminium Cast-rolling Strip<\/title>\n<meta name=\"description\" content=\"The size of the gap in the nozzle and roller has a great influence on the longitudinal streaks. 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