Part Length, Width, and Height
The following required PSOs are associated with the routing node Plastic Molding PG:
• Cavity Height (specifies both cavity height and part height)
• Cavity Length (specifies both cavity length and part length)
• Cavity Width (specifies both cavity width and part width)
You must supply values for these inputs, which serve two general purposes:
• To specify part dimensions, that is, the length, width, and height of the part’s bounding box. Part length and width are used to determine runner volume and runner area. Runner volume and area contribute to piece part cost via material utilization (see Material Utilization), injection time (see Times), and required clamp force (see Required Clamp Force).
• To specify mold cavity dimensions, that is, the length, width, and height of the cavity’s bounding box. These values help determine mold dimensions (see Mold Dimensions) and tooling costs (see Tooling Cost).
For injection molding cost models, part length and part width are defined so as to have the same values as cavity length and cavity width. So which part dimension is considered the height depends on how the part will be oriented in the mold—see the illustration below. (Note that this is different from process groups that do not involve a parting line; for those process groups, part length >= part width >= part height.)
