The cost of an injection mould depends on several connected factors, including material selection, dimensional tolerance, expected mould life, runner design, part complexity, inspection standards, and the intended production volume. Some specifications, such as cold runner systems, cavity steel, cosmetic finishing, and service coverage, may be simplified when the product and output requirements allow.
Material selection sets the foundation for the tooling specification. Typical mould bases include S50C and P20, while cavity components may use grades such as 718H, 1.2738, or S136. The best choice depends on wear resistance, corrosion resistance, projected service life, and the plastic being processed.
Tighter tolerances increase machining, measurement, and trial costs. For example, a custom plastic injection tooling specification may require a tolerance of ±0.02 mm. Complex precision moulds may also need CMM inspection, detailed reports, and several production trials before approval.
Cold and hot runner configurations are both available. A cold runner can be a practical cost-saving option when the application does not need reduced waste, faster cycling, or the processing advantages of a hot runner system. Cavity steel grade, surface appearance, and post-delivery service can also be reviewed against the actual product requirements.
Injection moulds are used for consumer electronics, home appliances, automotive components, industrial equipment, and everyday products. Simplification is appropriate only when it does not compromise part quality, dimensional stability, mould durability, or production targets. High-precision tooling, double-shot moulds, overmoulding, long-life projects, and mass production generally require more comprehensive engineering, inspection, and validation.
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