Nearly frozen design
The main geometry is stable and the remaining risk is material, tolerance, assembly or process behaviour.
Technical guide
Prototype injection mould
A prototype injection mould manufactures real moulded parts before production tooling. It prioritises speed, learning and changeability over long tool life or maximum productivity.
Its value is producing moulded parts with real or equivalent material and measurable parameters. It helps validate shrinkage, warpage, weld lines, sink marks, gate position, packing, finish and dimensional repeatability.
Criteria
Nearly frozen design
Representative material
The final material affects shrinkage, stiffness, fibre orientation, flexibility, finish or thermal behaviour.
Steel-change risk
Finding the issue in production tooling would require welding, machining, feed changes or repeated validation.
Evidencia
Injection point
Injection point
Helps decide weld line location, packing balance, visible gate mark and required pressure.
Walls and ribs
Shows real risk of sink marks, warpage, short shots or dimensional drift.
Measurement plan
Defines critical dimensions, sample quantity and criteria to transfer into production.
Technical FAQ
Frequently asked questions about prototype moulds
What does a prototype mould actually validate?
It validates injection-moulded part behaviour: material, shrinkage, warpage, weld lines, sink marks, gate position, finish, assembly and critical tolerances.
When is it better than printing a part?
It is useful when the decision depends on the real injection process or the final material, not only on checking shape or volume.
Can the information be transferred to production tooling?
Yes, if parameters, measurements, observed defects and design changes are documented as industrialisation criteria.