In-House Permanent Mold Casting and Finishing Services

With over 70 years of manufacturing experience, Le Sueur Incorporated is your best choice for permanent mold casting and finishing. Not sure where to begin? Our knowledgeable, friendly engineering team understands the complexities involved when designing permanent and semi-permanent mold castings. Our permanent mold casting process is all-encompassing. From early design engineering involvement and prototyping to complete in-house machining, finishing, and assembly services, LSI provides start-to-finish service for your permanent mold project.

Le Sueur Incorporated provides low pressure permanent mold (LPPM) and tilt pour permanent mold services. We specialize in dimensionally complex and pressure tight applications using several aluminum alloys that include 319, 355, 356, A356, and 413. Our foundry, located outside Minneapolis, Minnesota, has 15 tilt pour and 8 low pressure permanent mold casting work centers. We also offer semi-permanent mold casting with both processes.

To learn more about our permanent mold capabilities, ask us a question or request a quote today.

2 example Permanent Mold Aluminum Casting Channels from le Sueur Inc. Plate

Permanent Mold Casting Processes

Permanent mold casting, also known as gravity die casting, is similar to die casting and uses reusable steel molds to produce molded components.

To create a part, molten aluminum is poured into the steel mold via gravity or filled via low pressure. After the casting has cooled, the part is removed from the mold and finished. Permanent mold castings have a high degree of structural integrity, internal soundness, and offer superior mechanical properties.

Semi-permanent mold casting involves a similar process but includes the insertion of sand cores to form hollow passageways or to cast intricate geometry that cannot be formed by the permanent mold steel tooling.

Low Pressure Permanent Mold Casting

Low pressure permanent mold casting, or LPPM, uses low pressure to push molten aluminum into the mold cavity. This casting method produces a high quality and consistent finish, which minimizes finishing operations saving time and resources.

Tilt Pour Permanent Mold Casting

Tilt or gravity pour mold casting uses reverse image molds of the part to be cast. Molten metal is then poured, using gravity to fill the mold and produce the casting. This process is very stable which leads to consistent, quality castings.

Benefits of Using LSI's Permanent Mold Casting Services

Aluminum Permanent Mold and Semi-Permanent Mold Casting Product Solutions

Permanent mold and semi-permanent mold castings are used in a wide range of industries requiring pressure tight and structural castings. Products include:

  • Air Cylinders
  • Aluminum Housings
  • Aluminum Wheels
  • Base Housings
  • Cold Plates
  • Compressor Bodies
  • Cooling Fins and Fans
  • Couplings
  • Covers
  • Diaphragm Pumps
  • Differential Housings
  • Electrical Boxes
  • Electrical Transmission Equipment
  • Engine Mid-Plates
  • Fan Blade Hubs
  • Filter Bases
  • Gear Boxes
  • Gear Cases
  • Heating Elements
  • Hubs
  • Hydraulic Cylinders
  • Impellors
  • Manifolds
  • Marine components
  • Oil Pans
  • Pistons
  • Pressure Housings
  • Suspension Components
  • Transmission Channel Plates
  • Transmission Housings
  • Transom Base Mounts for Marine applications
  • Valve Bodies
  • Valve Housings
  • Various Pump Components
  • Wind Generation Equipment

Learn More About Our Permanent Mold Casting Capabilities

As an industry-leading supplier of aluminum castings and plastic injection molding, Le Sueur offers you both semi-permanent and permanent aluminum mold casting services. Let our expert engineers help you find the most cost-effective, efficient solution for your permanent or semi-permanent mold casting needs. Our capabilities include in-house precision machining, finishing, and assembly.

Please contact us to discuss your permanent mold casting project today.

Permanent Mold Aluminum Casting Pedestal with complex shapes and holes and a smooth finish

Aluminum Casting Oshkosh Mid Pan Assembly

a Permanent Mold Aluminum Casting TK 4 Cylinder from le Sueur Inc