DIN 16742: Plastic Moulded part tolerances for position tolerances
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According to DIN16742-2013A
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Depending on the moulded part compound specification, moulded part design and tool layout, the processing of the plastics has a significant effect on the dimensional stability of the moulded parts. The processing machines of the primary shaping method are complex thermodynamic-rheological compound systems, which are still processed and optimised empirically despite highly developed manufacturing technology.
Dimensionally-relevant properties of the plastics include the extreme range of the type-dependent stiffness or hardness as well as the moulding shrinkage. Unsteady and inhomogeneous tool and moulding temperatures in conjunction with orientations of microstructures and additional tolerances due to flow systems lead to property anisotropies, which cause a greater or lesser deformation (warpage, distortion, contortion) of the moulded parts. Furthermore, wall thickness differences or mass concentrations / material concentrations can be possible causes for deformation. Form, location and angle deviations are therefore connected in highly complex ways, which make standardisation much more difficult in comparison to metals.
The deviations from the nominal dimensions and the subsequent processing of our parts are generally dependent on the manufacturing or production processes used. DIN ISO 16742 applies for injection moulding, and the tolerance group TG 6 applies for our thermoplastics. DIN 12020-2 applies for the production of aluminium profiles. If the parts are mechanically processed, DIN ISO 2768m always applies.
MACHINING, SILK-SCREEN / TAMPO PRINTING, SAWING, EMBOSSING, CUTTING, DIGITAL PRINTING
All dimensions < 30 mm to the reference edge of the case with a tolerance of ± 0.3 mm. All other dimensions: unless otherwise specified against DIN ISO 2768m T1. At the same time, the tolerances of the basic parts must be taken into account.
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Tags: Plastic Part Design,Custom 2K Injection Molding,BI-Injection Molding,Custom Plastic Toolings,Manufacturing Plastic boxes,Plastic Molding,Custom Injection Molding
