Melling Engineered Aluminum Castings has four gravity fed tilt pour permanent mold machines that employ both permanent and semi-permanent cores for production. Permanent mold casting process has re-useable molds that are typically cast iron or coated with refractory coatings. Different types of coatings are used for insulating, chilling, lubricating, and releasing properties. After the coatings have been applied the mold is heated to production temperature, and Aluminum is then poured into ‘pour cups’ on the mold. The machine tilts the cavity from horizontal to vertical, filling the runners and casting cavity from the bottom. After a period of solidification the machine tilts back to horizontal and ejects the casting.
Permanent mold casting provides improved surface finish, and dimensional accuracy compared to sand casting. Other advantages of permanent mold include forced directional solidification, finer grain structure and reduced wall thickness.
Pour: 356, A356, and 359
For cast tolerances refer to the “Aluminum Association Standards for Sand and Permanent Mold Castings"
Melling Engineered Aluminum Castings employs gravity fed tilt pour permanent mold casting process to provide improved surface finish and dimensional accuracy at reduced costs compated to die casting.