ตัวกรองผลการค้นหา
Bell Mouth
แปลว่า(english) The flaring or tapering of a machined hole, usually made at the entrance end because of misalignment or spring of the cutting tool.
Backer (back-up plate)
แปลว่า(english) A “tool” or reinforcing part, which presses against the outer surface of an extrusion die, supporting it against the pressure of the extruding metal. The backer has an opening larger than the die aperture, allowing the extruded product to emerge without marring its soft surface.