Basic Process 1; Thermoplastic resin is heated to a molten state 2; It is then extruded through a die head to form a hollow tube called a parison. 3; the parison is dropped between two mold halves, which close around it. The parison is inflated. 5; the plastic solidifies as it is cooled inside the mold. 6; the mold opens and the finishe....
Steps in Casting
Pattern and Mould
Melting and Pouring
Solidification and Cooling
Removal, Cleaning, Finishing and Inspection
1. Permanent Pattern
a. Sand casting
b. Shell molding
2. Expandable pattern.
a. Investment Casting
b. Expanded polystyrene process (full-mold)
c. Permanent mold casting process
Introduction on Metal Casting CASTING Sand Casting Plaster Mold Casting ....