Week 8 - Challenge 6 - Core & Cavity Design

PARTING SURFACE

• Generally injection mold has two major components : the movable half and the fixed half, during the injecction molding process, these two halves are pressed tightly from a sealed hollow to avoid the melt flow leakage and maintain certain holding pressure, the pressed surface are called parting surface , usually parting surface are the biggest projection outline of the part.

PARTING LINE

• A parting line is an inevitable part of injection molded products.
• It is the line of separation between where two halves of a mold meet.
• It manifests itself on injection molded parts as a line that runs the entire perimeter of the part.
• In most parts, it is just a line that runs straight down the middle.

CORE DESIGN

• Core - A portion of the mold that goes inside a cavity to form the interior of a hollow part.
• Core-cavity - A term used to describe a mold created by mating A-side and B-side mold halves.

CAVITY DESIGN

• A mold is a hollow form typically made from stainless steel that has plastic injected into it to manufacture a plastic part.
• The plastic is inserted into the mold cavity, which is a hole in the mold shaped like the desired part.