At TPM we provide casting expertise to customers that are looking to stabilize and reduce manufacturing costs. We help them to recognize and utilize the best match of process to product function and provide options on maximizing value.
An aluminum die or tool is injected with a hot, paste wax to form each individual part. The parts are then assembled onto a wax runner with a wax gate to form a tree. The wax tree is then covered in slurry and refractory material until it hardens into a shell. Then, the wax is melted out at high temperatures until only the hollow ceramic mold remains. Molten metal is poured into the heated mold and set aside to cool. The shell is cracked off when the metal hardens, parts are cut off by a high-powered saw and the gates are ground down to the client’s specifications.
Tempered sand is packed onto wood or metal pattern halves, removed from the pattern and assembled together with cores to complete the mold. Metal is then poured into the resultant cavity until filled. Once the metal has cooled and hardened, the sand mold is broken and the castings are removed.
Polystyrene (foam) patterns are created using aluminum molds, attached to a “runner” system and coated with refractory material. This assembly is then placed into a flask where sand is vibrated and compacted around it. The polystyrene is then melted out and metal is poured inside the now hollow assembly, the casting solidifies and is removed.
"TPM is our only source for investment castings and I am going to make sure that it stays that way. "