In the experiment, a disk-shape geometry (diameter41.5 mm, thickness 3.5 mm) was injection molded in Low-Density Polyethylene in a two-cavity mold. The inserts as well as selected injection molded parts were analyzed with an optical 3D micro-coordinate measuring machine. It was found that additive manufacturing technology can lead to a significantly more cost effective pilot production, both in terms of development time and investment. DLP technology enables fast production of micro-features, however insert production with DLP is less reliable than milling e.g. when considering process repeatability. Photopolymer and brass inserts lead to differences in optical surface appearance on the injection molded parts. The lifetime of the photopolymer inserts is challenging to predict reliably. Depending on how many parts need to be produced, the use of several photopolymer inserts instead of one brass insert is a means to overcome the shorter lifetime and can represent a cost-effective alternative to machined inserts. In order to exploit the advantages of using additive manufactured injection mold inserts, specific tool design rules have to be applied.
|Title of host publication||Proceedings of ANTEC 2017|
|Number of pages||5|
|Publisher||Society of Plastics Engineers|
|Publication status||Published - 2017|
|Event||ANTEC 2017 - Anaheim, United States|
Duration: 8 May 2017 → 10 May 2017
|Period||08/05/2017 → 10/05/2017|