Round Hole Perforated Sheet for Grain Sieving Agricultural Machinery

• High sieving efficiency: Standard staggered round hole design makes grain flow evenly, no material blocking, improve sorting speed of rice, corn and wheat.
• Smooth burr-free hole edge: CNC one-time punching + full deburring process, prevent grain surface scratch and breakage, reduce grain loss rate.
• Excellent wear resistance: Thickened plate option, long service life under continuous grain friction, reduce frequent screen replacement cost.
• Two anti-rust material options: Galvanized steel for dry grain workshop, 304 stainless steel for wet cleaning & food-grade grain processing.
• Fully customizable parameters: Hole diameter, sheet thickness, overall dimension can be adjusted to match small household sieving machines and large industrial grain processing lines.
• Large ready stock & factory direct price: Standard perforated sieve sheets stored in warehouse, no middleman markup, fast delivery within 3–7 working days for bulk agricultural orders.

Production Technological Process:

• Raw material inspection: Select high tensile galvanized steel coil or 304 stainless steel coil, test tensile strength and corrosion resistance.
• CNC staggered round hole punching: Professional grain sieve mold punches uniform round holes in staggered arrangement at one time.
• Automatic deburring & leveling: Roller leveling removes sheet warpage; polishing equipment clears all sharp burrs around holes and edges.
• Anti-rust surface treatment: Hot-dip galvanizing for carbon steel sheets; pickling & passivation for stainless steel sheets.
• Fixed-size cutting: Cut finished perforated sheets into standard 1000×2000mm or customer customized sizes.
• Performance testing & warehousing: Test wear resistance, hole flatness and sieving smoothness; qualified sieve plates classified into stock area.