Magnetite Processed Rolling Drum Countering Block For Cigarette Making Machine Mark 8 Tipper Side

Blackened Rolling Block is a casting part of filter assembly machine, placed next to the rolling drum, functioning together to roll the tipping paper and connect the filter and the cigarette.

Blackining

Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys, zinc, powdered metals, and silver solder. It is used to add mild corrosion resistance, for appearance and to minimize light reflection. To achieve maximum corrosion resistance the black oxide must be impregnated with oil or wax. One of its advantages over other coatings is its minimal buildup.

General Blackening Methods

Steel can be "blackened" using paints, chemical conversion coatings often referred to as patinas, gun bluing or black oxide finishes, and waxes. Frequently, there will be a combination of two or more of these processes used to reach the desired effect, and two finishers may arrive at the same place using two totally different methods

Hot Black Oxide For Stainless Steel

Hot black oxide for stainless steel is a mixture of caustic, oxidizing, and sulfur salts. It blackens 300 and 400 series and the precipitation hardened 17-4 PH stainless steel alloys. The solution can be used on cast iron and mild low-carbon steel. The resulting finish complies with military specification MIL-DTL–13924D Class 4 and offers abrasion resistance. Black oxide finish is used on surgical instruments in light-intensive environments to reduce eye fatigue.