Investment Casting Process

A reliable source for Investment Castings information and leading Investment Castings Companies & Manufacturers.

Though metal workers have several processes to choose from, this particular method of production allows for the creation of near net shape products with great detail that would otherwise be difficult or impossible to achieve with other casting methods and secondary processes such as welding and soldering. Read Moreā€¦

Investment Casting Process The investment casting process is a popular metallurgical technique used to create detailed industrial parts and components through the metallic replication of wax models.

Leading Manufacturers

Cleveland, OH  |  440-250-1900

For over 30 years, we have provided metal forged products for a wide variety of industries, including the aerospace, military, food service, medical, and automotive industries. Our customers know they can trust our forgings for quality and affordability. We will never try to make you pay more than you should for our products. Contact us by phone or email to find out more!

Request A Quote

Ferralloy Inc. $$$

Waterville, OH  |  419-878-8156

Since 1944 we have been driven to remain a cut above the competition in investment castings and everything we do. We have our own tooling shop filled with state-of-the-art testing machines. We ensure perfect results every time. It is our goal to establish lifelong relationships with our customers that benefit us both. Contact us for more info today!

Request A Quote

Rimer Enterprises, Inc. $$$

Montrose, MN  |  763-675-3169

Established in 1983, Craft Pattern & Mold's foundry uses investment casting, sand casting, rubber plaster casting and spin casting to produce high-quality prototypes or do short-run production. For our customers' castings, we use aluminum, ductile iron, gray iron, zinc or stainless steel.

Request A Quote

Craft Pattern & Mold, Inc. $$$

Honeoye Falls, NY  |  585-624-4894

Here at K&H, we use a fine sand mold process and use fine sand and a urethane binder to produce a broad range of products. We are able to prototype permanent mold applications and produce thicker and irregular wall thicknesses. We offer short lead times for prototypes and low volume production castings as well as other in house value added services. For more information, visit our website or call us today! Our design team looks forward to working with you!

Request A Quote

K&H Precision Products, Inc. $$$

Kenilworth, NJ  |  908-245-2255

Alloy Cast Products, Inc. was incorporated April 3, 1959. Our focus has always been castings and machine finished parts made from exotic cobalt based alloys, primarily our trademark REXALLOY materials. Extending our four decades of COBALT BASED alloy experience to all companies who are seeking solutions to their wear and corrosion problems has made us known throughout the world.

Request A Quote

Alloy Cast Products, Inc. $$$
placeholder image Ferralloy Inc. Rimer Enterprises, Inc. Craft Pattern & Mold, Inc. K&H Precision Products, Inc. Alloy Cast Products, Inc.

Investment casting is among the most basic techniques used and as such delivers reliable results at a reasonable cost, though it is not always the most economic of options. In short, this multi-step process involves forming a mold around a wax pattern and allowing it to harden before melting away the wax, leaving a hardened shell that can be filled with molten metal and removed once the desired form is sufficiently cooled.

Investment Casting Process Investment Casting Process - Rimer Enterprises, Inc.

The process is extremely versatile and with proper knowledge of the chemical formulas and molecular composition of the materials involved, manufacturers can instill specific attributes such as durability, magnetism, or weight load while diminishing or eliminating negative characteristics. Proper mechanics also allow for castings to be as small as fractions of an inch thick or as much as 1,000 pounds in weight, though most investment casting products are 15 pounds or less. Such capabilities find investment castings in the aerospace, automotive, chemical, defense, food processing, electrical, railroad, mechanical, marine, electronic, textile, engineering and several other major industries. Though relatively straightforward, the investment casting process involves a number of detailed steps.

To begin, manufacturers must create a master die or wax pattern. Though not always made of wax, this feature gives the process its alternate names of wax casting and lost wax casting. This form is an exact replica of the part to be produced. In some cases, it is the original prototype which may be either hand carved or carved by machine. It may also be made through injection molding. It is crucial that any flaws or imperfections be removed at this time and that exact specifications are met.

The master die is then mounted on a wax rod known as a sprue using a heated metal tool. Several such patterns may be attached to one sprue forming a cluster known as a tree.

The next step is to apply what is known as the investment. This ceramic slurry must coat the entirety of the wax mold. Common techniques include dipping the sprue or tree repeatedly into the investments of decreasing fineness until the desired thickness is achieved or alternately affixing the sprue in a flask and pouring the investment in around it.

Once the investment dries and hardens, it is placed upside-down in an oven or furnace, causing the wax form to melt and run out leaving the desired mold. Additional heating ensures that all residue and moisture are gone and preheats the mold allowing the incoming molten metal to coat more evenly before cooling in the mold.

Once the metal is poured into the mold it is cooled and the hardened investment shell is removed via media blasting vibrations, hammers, or a dissolving agent to reveal the seamless final product.

Investment Casting Process Informational Video