Overview
ISO 10072:2004 - Tools for moulding - Sprue bushes - Dimensions defines the standardized dimensions, tolerances, material and hardness requirements for sprue bushes used mainly in injection moulds for plastics and rubbers. This international standard (second edition, 2004) specifies measurements in millimetres, surface-roughness units in micrometres, and a uniform designation system so sprue bushes are interchangeable across tooling and moulding operations.
Key Topics
- Scope: Main dimensions and tolerances of sprue bushes for injection moulds (plastics and rubber).
- Types: Two geometric types are covered - Type A (rounded nose for machine adaptor) and Type B (straight nose).
- Dimensions & tolerances: Basic dimensional data (in mm) and surface finish values are given; general tolerances reference ISO 2768-1 (tolerance class m).
- Material: Sprue bushes must be manufactured from tool steels in accordance with ISO 4957.
- Hardness: Specified hardness is (50 ± 5) HRC for the sprue bushes.
- Designation rules: Standardized naming includes standard reference (ISO 10072), type (A/B), diameters, spherical radius (SR for Type A), length, and angle.
Example:
Buse d'injection ISO 10072 - A12 × 2,5 × 15,5 × 20/1°30' (Type A, d = 12 mm, d2 = 2.5 mm, SR = 15.5 mm, l = 20 mm, α = 1°30').
Applications
- Injection mould design and manufacture: Ensures correct sprue-bush fit in moulds for consistent melt delivery and ejection.
- Toolmakers and mold shops: Use ISO 10072 dimensions to machine and order standardized sprue bushes, reducing rework and ensuring interchangeability.
- Mould maintenance and spare-part sourcing: Standard designation simplifies identification and procurement of replacement sprue bushes.
- Quality and inspection: Dimensional and hardness specifications provide acceptance criteria for incoming components and in-house production checks.
- Industries: Plastic molding, rubber molding, automotive, consumer goods, medical devices, and any manufacturing relying on injection moulding.
Keywords: ISO 10072, sprue bushes, injection moulds, dimensions, tolerances, tool steel, hardness, injection moulding, mould design.
Related Standards (if applicable)
This concise specification makes sprue bush selection, manufacturing and inspection predictable and interoperable across the injection moulding supply chain.
