Pressure Cooker Manufacturing Process

Overview

• Purpose: Utilize steam pressure to cook meals quickly
• Technology: Dates back centuries, adapted for households in the 1930s
• Modern Features: New lid locking technology, safety features

Pot Formation

• Starting Material: Stainless steel disc
• Lubrication: Disc dipped in lubricant
• Forming Process:
  • Disc pushed over a pot-shaped die
  • Transforms the flat disc into a rounded pot

Rim Notches

• Punch Cutter: Makes notches in the pot's rim
• Purpose: Notches interlock with the lid, securing it against steam pressure

Bottom Coating

• Materials: Aluminum and silicon discs
• Application:
  • Discs submerged in aluminum-silicon liquid mix
  • Aluminum disc placed on the pot's bottom, stainless steel disc placed on top
• Fusion:
  • Heated to 1100°F to fuse discs to the pot's bottom
  • Cooled in a tank

Edge Finishing

• Blade Shaving: Removes ragged edges, creates beveled effect
• Purpose: Enhances heat conductivity

Polishing and Cleaning

• Sanding and Buffing: Adds luster
• Washing: Removes sanding residue

Lid Manufacturing

• Shaping: Six pressing operations
• Holes: Center holes for two safety valves
• Main Valve Installation:
  • Retaining ring aligned with larger hole
  • Spring valve inserted and screwed in
• Backup Valve: Installed in smaller hole
• Sealing: Rubber ring creates airtight seal
• Testing: Valves and closing mechanism checked

Handle Attachment

• Bolts Installation: Welded into pot, space left between bolt heads and pot
• Brackets: Attached to bolts, torqued for tightness

Final Testing

• Quality Check: Randomly selected pots
• Simulation: Pumped full of air to simulate steam pressure
• Double Walls: Some models feature double walls to retain heat, ease cooking process