Manufacturing Process

The Sand Casting Foundry Manufacturing Process at its Best

Every sand casting foundry follows a somewhat similar process in manufacturing components. After all, sand casting has been around for over 3,000 years. J&L’s sand casting foundry uses a no-bake, Isocure process, and for each casting there is a specific process to ensure that we sell our customers the best product on the market. Explore our manufacturing process at J&L Precision Castings or call for a personal tour.

Pattern Making

J&L has the capability to make patterns out of iron, aluminum, urethane, and wood. For added stability, all patterns are mounted on aluminum boards. Our experienced pattern making team and machining centers can handle even the most intricate design features and J&L delivers tight casting tolerances of +/- 0.010-0.020".


J&L utilizes two Georg Fischer Automatic Molding Machines.

  • Quick change / set-up capability
  • Silica sand, Isocure binder system
  • Two automatic molding lines capable of producing 50 molds per hour - flask size up to 26”x26”
  • Specialty no-bake molds - up to 36"x36"


  • Variable batch melting capacity
    • Three sets of 2,500 lb. coreless induction furnaces
    • One 1,000 lb. coreless induction furnace
  • Automatic pouring system
  • Deck pouring for prototype and short runs


  • Abrasive saw cut-off
  • Arc air
  • Snag grinding
  • Detailed bench grinding
  • In-process inspection
  • Certified welders
  • Pangborn continuous shot blast

Quality Assurance

  • Digital temperature displays
  • Zeiss CMM
  • Spectrometer
  • Work instructions on routing cards
  • Preliminary analysis on each heat
  • In-process inspection
  • Product traceability
  • Daily sand testing