Managing Anisotropic Shrinkage and Restraint Fixturing in Polymer Metrology
Polymer metrology requires force-controlled restraint fixturing and thermal conditioning to isolate mold geometry from anisotropic shrinkage and sag.
ISO 1101
Meaning
International standards defining the geometrical product specifications for the tolerancing of form, orientation, location and run-out. ISO 1101 provides the symbolic language used on engineering drawings to communicate precise manufacturing requirements. It establishes a universal basis for interpreting geometric tolerances in global supply chains.
Specification Standard
Engineering drawings use a shorthand of symbols to define the limits of variation for a manufactured part. Within the framework of ISO 1101, symbols for parallelism, cylindricity and position ensure that a part made in one country fits into an assembly made in another. This prevents the ambiguity that occurs when using only linear dimensions to describe complex shapes.
Modern coordinate measuring machines use these definitions to program their inspection paths.
Drawing Language
Technical communication depends on every supplier using the same definitions for terms like datum and tolerance zone. Adoption of ISO 1101 eliminates the need for lengthy text descriptions on blueprints.
Compliance Requirement
Quality audits check that the design intent is correctly captured and that the manufacturing team has met every specified tolerance. Following ISO 1101 is a common requirement for suppliers in the aerospace and automotive sectors. Failure to adhere to these rules results in parts that cannot be verified by the customer.