Q9Basic Mechanical Engineering
Question
2 marks
Q.9. Give the name of four types of patterns.
Answer
Four common types of patterns used in sand casting include Solid, Split, Match Plate, and Sweep patterns.
A pattern is a replica of the desired casting. Types include: 1. Solid (Single-piece) Pattern: Simplest form, used for basic, easily withdrawn shapes. 2. Split (Two-piece) Pattern: Divided into two halves along the parting line for complex shapes. 3. Match Plate Pattern: Split pattern halves are mounted on opposite sides of a metal plate; used for rapid mass production. 4. Sweep Pattern: A contoured wooden board rotated around a central axis to sweep out large symmetrical molds (like bells).