Waltek Investment casting technology
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WHY INVESTMENT CASTING?
 
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Contact Waltek

Investment casting or "Lost Wax Casting" is one of the oldest known metal-forming techniques. Although the base process dates back more then 5000 years, today’s advances in automated machinery, casting waxes, materials and specialty alloys, have transformed investment casting into a highly efficient and cost effective manufacturing process. Investment casting allows the production of components with tight tolerances, high volume, and versatility in a variety of metals and high-performance alloys.

Small, intricate, or hard-to-machine shapes can be produced much more efficiently with the investment casting process. By using a wax impression mold, elaborate and expensive tooling (such as multiple or progressive dies) can be avoided when producing parts with unusual designs or with complex internal configurations.

Often several machined parts can be combined into one casting, eliminating or greatly reducing other labor intensive operations like welding, assembly, and finishing work.

Because each part is formed from the same master mold, variability is minimized. For many parts you can achieve higher quality, more detail, greater consistency and better repeatability than traditional metal forming methods.

THE INVESTMENT CASTING PROCESS

wax impression mold 1. A master production wax impression mold is made to precise specifications. Note that all parts are made from ONE master mold to insure uniformity in complex and intricate parts. Molten Metal Pour 4. The new ceramic "shell" is autoclaved, melting out the wax core, leaving an empty ceramic shell that will produce multiple parts. The shell is fired at high temperature becoming the precision mold into which the molten metal is poured for casting.
paste wax injection 2. Specially formulated hot liquid or paste wax is injected into the mold and allowed to harden into an exact replica, or pattern, of the finished metal part. Waltek Inc. uses multi-cavity tooling to produce many identical parts per injection. ginding metal castings 5. When the metal cools down the ceramic shell is removed using a variety of methods and each precision part is cut from the sprue. Parts then go to grinding, machining and other secondary operations as required.
Wax Spur 3. Multiple wax patterns are ganged together on a single expendable wax sprue. These sprues are then repeatedly dipped in ceramic slurry, coated with refractory sand, and allowed to dry in a temperature and humidity controlled environment.    

QUALITY CONTROL (ISO 9001 :2008)

With our complete inhouse QA department, Waltek can remain highly competitive while maintaining strict quality standards.

Metal chemistry is tested for every melt with a computerized in-house spectrograph. Other tests such as Rockwell (hardness) are conducted as required. Job chemistry is recorded daily on computer.

14310 Sunfish Lake Blvd. • Ramsey, MN 55303 • Toll Free: 1.800.937.9496 • Tel: 763.427.3181 • Fax: 763.427.3216 • sales@waltekinc.com or orders@waltekinc.com
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