Gas Injection Technique - Part Design and Process Capability 2001-01-3427
The gas injection technique (GIT) is a multi-component process, similar to the sandwich technique. By injecting inert gas into the molten plastic, hollow spaces are created in areas of the moulded part.
In order to reach the desired gas flow, it must be stated that the position of melt and gas injection is of particular importance. The requirements for mould filling and gas injection, will be shown using a sample moulded part.
Statistical methods, derived from well known SPC-index Cp and Design of Experiments (DoE), have been developed for the evaluation of process capability before series production. The benefits for GIT will be explained.