Plastics with low, predictable shrinkage rates are the best candidates for TG5. Amorphous polymers (such as Polycarbonate or ABS) shrink uniformly and are highly suited for TG5. Semi-crystalline polymers (like Polyamide or Polypropylene) exhibit high shrinkage and anisotropy (different shrinkage rates parallel and perpendicular to the melt flow), making TG5 much harder to achieve without strict tooling modifications. Compound Formulations
A material’s inherent shrinkage behavior dictates which tolerance group it can realistically achieve. Polymers are broadly categorized into two classes based on their molecular structures: Amorphous Plastics (Lower Shrinkage)
Choosing means you are specifying a tight, high-accuracy tolerance grade. It is typically applied to functional components that interact closely with other parts, such as gears, snap-fits, medical housings, and automotive electrical connectors. 1. Component Dimensions vs. Tolerance Range
Tool cost reduced by 18%. First-pass yield reached 97% (vs 82% if full TG5). The housing passed 95°C thermal shock testing. din 16742 - tg5
Crystalline materials (like PBT or PA) shrink and warp more than amorphous ones (like ABS or PC), which can push your part out of the TG5 field if not managed Pekago Covering Technology Wall Thickness:
Structural frames, heavy industrial covers, non-mating surfaces. 5. Implementation Recommendations
TG5 embodies the philosophy of modern tolerancing for plastics: realistic, manufacturable, and aligned with international standards. It remains the workhorse tolerance group for the global plastics industry. Plastics with low, predictable shrinkage rates are the
injection-moulding-tolerances-din16742-2013.pdf - Xometry Pro
user wants a long article about "din 16742 - tg5". I need to provide comprehensive information on this standard. I'll follow the search plan. The first set of searches is to understand the standard and find comparison information. search results provide some initial information. I need to gather more details. The second set of searches is for TG5 tables, determination, and multi-component applications. search results provide some information on TG5 tables, determination, injection molding, multi-component, vacuum casting, and form tolerance. The third set of searches is for commercial applications, industries, Chinese, and selection criteria. search results provide information on automotive, electronics, Chinese, and selection criteria. Now I need to gather detailed information from the standard itself. I will search for the standard and related articles. need to open some of these results to get more detailed information. I'll open a selection of results from the first set. search results provide a wealth of information. I will now structure the article. The article will cover: an introduction to DIN 16742 and TG5, the scope, how TG5 fits into the tolerance group system, detailed tolerance specifications, factors influencing tolerance selection, comparison with other standards, applications, practical implementation, and conclusion. I will cite relevant sources throughout. The Definitive Guide to DIN 16742-TG5: Mastering Tolerances for Plastic Injection Moulded Parts
In this standard, accuracy is categorized into "Tolerance Groups" (TG) ranging from TG1 (precision) to TG9 (coarse) TG5 is the "Standard": It is widely considered the industry baseline for Standard Injection Molding Pekago Covering Technology Application: detailed tolerance specifications
The following table provides an overview of the permissible limit deviations for in accordance with DIN 16742-TG5:
DIN 16742 replaced the older DIN 16901 in 2013 to provide a more rigorous framework for injection molding Super-Ingenuity . It isn't just a list of numbers; it's a system that links material properties mold design manufacturing accuracy Super-Ingenuity 2. Decoding TG5 (Tolerance Group 5)
: Dimensions affected by moving mold parts (like the parting line or sliders). These require larger tolerances to account for machine shifting or clamping variations. Design Considerations for TG5