Glossary
Concise, clear definitions of modeling, tooling and composite terms.
- CTE (Thermal Expansion)
- The rate a material expands dimensionally with temperature change (ISO 11359).
- Core Box
- The tool used to make cores that form internal cavities in castings.
- Gelcoat
- The first resin layer applied to form the surface of a mold or part.
- HDT (Heat Deflection Temp.)
- The temperature at which a material deforms under a defined load (ISO 75).
- Lamination
- Building a composite by laying fiber reinforcement with resin layer by layer.
- Master Model
- The reference model from which molds are produced.
- Modeling Board (MB)
- A medium-density board used for master models and foundry patterns.
- Negative
- An intermediate mold carrying the reverse (female) form of a model.
- Pattern Plate
- A plate carrying the pattern that forms the mold shape in the sand.
- Prepreg
- Fiber fabric pre-impregnated with resin and cured in an autoclave.
- RTM
- Resin Transfer Molding: resin is injected under pressure into a closed mold.
- Resin Infusion (RIF)
- A closed-mold process where dry fiber is impregnated with resin under vacuum.
- Shore Hardness
- Surface hardness measured on the Shore A/D scale (ISO 868).
- Styling Board (SB)
- A low-density, easy-to-machine board used for design and form studies.
- Tooling Board
- A CNC-machinable polyurethane or epoxy block material used to make models, molds and masters.
- Working/Tooling Board (WB)
- A high-density, temperature-resistant board used for composite and forming molds.