Din 16742 - Tg5 Free Site

The DIN 16742 - TG5 standard is a critical benchmark for standard injection molding, specifically defining the general tolerances for plastic parts. Widely utilized by German Tier 1 suppliers, this standard ensures engineering rigor by focusing on the relationship between mold-fixed and non-mold-fixed dimensions. Understanding DIN 16742 TG5

The test involves measuring the mass change of a sample as a function of temperature, typically in a inert atmosphere. This allows for the identification of decomposition temperatures, mass loss rates, and residual masses. din 16742 - tg5

1. Functional Analysis: Does the part function if the dimension varies by ±1.0%? If yes, TG5 is viable.
2. Material Capability: Does the material (e.g., PP) typically fluctuate more than ±0.2%? If so, specifying TG1 would result in high scrap rates; TG5 aligns the drawing requirements with the material reality.
3. Economic Impact: Moving from TG5 to a tighter group (like TG2) generally requires multi-cavity molds with higher consistency, robotic handling, and longer cycle times, increasing the unit price.

Precision Level: TG5 is often categorized as "Accurate Production" for various thermoplastics. The DIN 16742 - TG5 standard is a

Baseline for many automotive interior trims and consumer tech. Functional Analysis: Does the part function if the

Is TG5 Right for Your Project? A Decision Matrix

| If your part requires... | TG5 Recommended? | | :--- | :--- | | Sliding fit with metal shaft | Yes | | Ultrasonic welding alignment | Yes | | Living hinge geometry | No (Use TG3 – residual stress affects hinge) | | Overmolding with silicone | Yes (for shut-off surfaces) | | Large part > 300 mm | No (Use TG3/TG4 – warp dominates) | | High-volume consumer goods (>1M parts) | Yes (tool amortization justifies precision) |

Use TG5 for general-purpose plastic parts where fit is important but doesn't require extreme "watchmaker" precision Higher Groups: