ISO 10724-2:1998

Overview

ISO 10724-2:1998 is the International Standard that defines the injection-moulding moulds and basic preparation procedures for producing small plate test specimens from thermosetting powder moulding compounds (PMCs). It is Part 2 of ISO 10724 and complements Part 1 (general principles and multipurpose specimens). The standard specifies two two‑cavity ISO mould types - type D1 and type D2 - for plates of 60 mm × 60 mm with preferred thicknesses of 1.0 mm (D1) and 2.0 mm (D2).

Key topics and technical requirements

• Mould geometry: Cavity dimensions are tightly specified (length 60–62 mm, width 60–62 mm, depth D1: 1.0–1.1 mm; D2: 2.0–2.1 mm) to produce comparable test plates.
• Gate and runner design: Gate length, gate height and runner cross-section are defined with tight tolerances because they strongly affect melt curing, filler orientation and moulding shrinkage.
• Pressure sensor: A flush-mounted cavity pressure sensor is included for accurate measurement of moulding shrinkage (mandatory for shrinkage tests) and can assist in controlling injection timing.
• Machine requirements: The standard gives a recommended minimum clamping/locking force (example: 880 kN for a maximum melt pressure of 80 MPa) and recommends injection times comparable to the type A ISO mould to ensure equivalent flow and cure conditions.
• Specimen handling and markings: Guidance is provided on runner removal, specimen cutting, and cavity markings to preserve orientation, top/bottom identification and traceability for later testing.
• Informative annexes: Annex A (recommended applications), Annex B (studying weld lines with mould inserts), Annex C (marking conventions), and Annex D (bibliography).

Practical applications

• Producing standardized small plates for:
  • Multiaxial impact testing (ISO 6603)
  • Moulding shrinkage measurement (ISO 2577)
  • Electrical property testing, water absorption, dynamic mechanical analysis
  • Studies of anisotropy, filler orientation and weld‑line effects
• Use cases include material characterization, quality control, formulation development and comparative data acquisition for thermosetting PMCs.

Who should use this standard

• Test laboratories and materials engineers performing mechanical, thermal or electrical testing on thermosets
• Injection‑moulding tool designers and mouldmakers developing ISO-compatible test moulds
• R&D teams and quality assurance groups in polymer compounding and plastics manufacturing
• Standards professionals harmonizing test specimen preparation for comparable data

Related standards

• ISO 10724-1 (general principles and multipurpose specimens)
• ISO 2577 (moulding shrinkage)
• ISO 6603 (puncture/multiaxial impact)
• Other referenced test standards for tensile, electrical and dynamic properties

Keywords: ISO 10724-2, injection moulding, thermosetting powder moulding compounds, PMCs, small plates, type D1, type D2, moulding shrinkage, weld lines, pressure sensor, test specimens.