TPM Metalcraft Minute
Your Source for Investment Casting Knowledge
The 4 Main Departments in Investment Casting
Why is the shell building so important?
A good shell is strong and permeable (air and gasses can pass through) but weak enough after casting for easy removal from the metal parts. A good shell is also consistent in that the slurry is applied and drained in such a manner to deliver even coats. Much of the successes and failures in making investment castings is due to the shell building process.
Steps In Creating The Investment Casting Shell
TPM uses premium shell materials ensuring that we have a consistent slurry, resulting in a consistent shell. The wax pattern is first dipped into a slurry made of various refractory flours, polymer, and colloidal silica binder. These materials deliver a nice even layer of slurry for which the stucco to adhere.
TPM uses a zircon stucco (sand) for the first layer and subsequent layers receive a fused silica stucco. This stucco layer is applied once the slurry is drained evenly and begins to stop dripping. The stucco layer adds permeability, bulk and strength to the ceramic shell.
Drying of the Shell
Once the stucco layer is applied and the excess sand is shaken off the shell goes into a temperature and humidity controlled room. This room is designed to dry the ceramic shell efficiently and completely between layers. This ensures that we have the strongest shell possible when it comes to pouring the metal into the shell.
Drying of the Shell
Technical Sales Manager
Antonio joined TPM in August 2014 and has been in the investment casting industry since 2010. He has expert knowledge in the shell process as well as a strong general knowledge of foundry processes. He has extensive sales and management experience in various industries spanning 11 years. As a Sales Engineer, Antonio successfully grew business by taking a truly consultative sales approach. He used his technical knowledge and ability to build lasting relationships with customers to truly address their corporate goals and objectives. He has used these strong business partnerships to offer and implement products and solutions, positively impacting the customer's bottom line. As Technical Sales Manager (and author of this newsletter) at TPM he is continuing this tradition of delivering products and solutions to address customer's business needs. His goal at TPM is to achieve and maintain Trusted Adviser status with customers resulting is strong business partnerships. Contact Antonio if you have any questions regarding any Investment Casting needs.
- Shell Dipping Process- Materials and their importance
- Meet our Project Engineer
What Our Customers Say...
"With TPM, it's correct, it's well packaged, it's efficient. It's always a time savings!" - Kevin Campisi, Cam-Tech Products, Inc.
"TPM provides great quality parts and outstanding communication. With TPM parts I have no concerns about rework or scrap." - Larry Murray, SMC, Inc.