GENERAL MANUFACTURING GUIDELINES

for plastic articles in the vacuum thermoforming process

  1. Tolerances for shape-related dimensions only in accordance with DIN 2768 T1 c I T2-L; angular dimensions in accordance with DIN 2768-v.
  1. Tolerances for machining dimensions according to DIN 2768 T1 m I T2-K; angular dimensions according to DIN 2768-c.
  1. Machining dimensions in direct relation to a shape-related point in accordance with DIN 2768 T1-c and T2-L.
  1. If possible, zero points are defined in the middle (symmetry axis) of the molded parts in order to keep fluctuations in the processing dimensions in relation to the mold dimensions to a minimum.
    Deviations from this can be agreed.
  1. Information on material thickness refers only to the base material.
  1. The sides facing away from the mold are dependent on the material flow and can only be maintained to a limited extent.
  1. To ensure the functionality of the parts, we can be supplied with sample parts to which we can adapt the molded part in the best possible way.
  1. Color deviations are possible in small nuances depending on the material batch.
    If components with very different material stretching are combined, color differences may also occur.
  1. For negative parts (formed in a “trough”), the internal dimensions depend on the material.
  1. For positive parts (pulled over a “core”), the external dimensions depend on the material.

These specifications apply to hard plastics such as: PMMA / PS / ABS / PC / PVC hard, etc. PE / PP / soft PVC are excluded.

KVH Hartung GmbH Konrad Zuse Bogen 20
82152 Krailling
Krebs Jan.
2019

Certified according to ISO 9001:2015

Allgemeine-Fertigungsrichtlinien