ISO 10724-1:1998 PDF

Overview

ISO 10724-1:1998 defines general principles for the injection moulding of test specimens made from thermosetting powder moulding compounds (PMCs). It specifies mould design and process-control requirements for producing multipurpose test specimens that give reproducible and comparable test data. The part is intended to harmonize how moulding parameters are described and reported so laboratories, manufacturers and standards bodies can compare results reliably.

Key Topics and Requirements

• Scope and purpose: Establish uniform practice for moulding test specimens of thermosets and for reporting moulding conditions.
• ISO moulds: Defines standard multi-cavity ISO moulds (notably type A) with interchangeable cavity plates to fit existing injection-moulding equipment.
• Cavity and gate geometry: Specific dimensional requirements, e.g. sprue diameter ≥ 4 mm; runner width/height ≥ 5 mm; gate height ≥ 2/3 cavity height; gate length ≤ 3 mm. Cavity draft angles: runners 10°–30°, cavity ≤ 1° (shoulders ≤ 2°).
• Specimen dimensions: Multipurpose specimens per ISO 3167; rectangular bars (80 × 10 × 4 mm nominal) are cut symmetrically from the central section (80 mm − 2 mm final length).
• Machine and process control: Requires reciprocating‑screw injection machines and tight tolerances for repeatability: injection time ±0.1 s, hold pressure ±5 %, hold time ±5 %, melt and mould temperature ±3 °C, mass of moulding ±2 %.
• Moulding volume and shot capacity: Ratio of moulding volume to shot capacity recommended between 20 % and 80 % unless otherwise specified.
• Quality features: Recommendations for pressure sensing in runners, polished cavity surfaces (directional polishing to match test loading), marking of cavities outside test areas, and ejector pin placement outside test regions.
• Reproducibility focus: Emphasizes control of melt temperature, melt pressure, curing/cure time and residual stresses since these strongly affect thermoset properties.

Applications and Users

Who uses ISO 10724-1:

• Materials and testing laboratories preparing specimens for mechanical, thermal and processing property tests.
• Tooling and mould designers specifying ISO-compatible multi-cavity moulds.
• Injection‑moulding process engineers seeking reproducible moulding conditions for thermosetting PMCs.
• Quality assurance teams, certification bodies and parties in technical disputes that require standardized test specimen production.

Practical uses:

• Producing comparable test specimens for material data sheets and round‑robin testing.
• Establishing controlled moulding cycles and parameter reporting for contract testing and supplier qualification.
• Designing moulds that permit rapid changeover and consistent specimen quality.

Related Standards

• ISO 3167 - Multipurpose test specimens
• ISO 294 series - Injection moulding of test specimens (thermoplastics)
• ISO 2577 - Determination of shrinkage for thermosetting moulding materials
• ISO 10350-1, ISO 11403 series - Acquisition/presentation of comparable data

Keywords: ISO 10724-1, injection moulding, thermosetting PMCs, multipurpose test specimens, ISO mould, mould design, moulding parameters, melt pressure, mould temperature.