New Intermeshing Pin Mixer for Injection Molding
Chris Rauwendaal
REE, Inc.
USA

Keywords: mixer, injection molding, intermeshing

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It is well known that reorientation of interfaces is key to efficient distributive mixing. However, how to achieve reorientation is not well known. This paper describes how interfaces can be reoriented in screw extruders and which method leads to the most effective reorientation. A new mixing device, the VIP® mixer, was developed to achieve highly efficient orientation. The VIP mixer can produce excellent mixing quality over a short axial length, as short a one diameter.

This makes it possible to incorporate the VIP mixer into the non-return valve (NRV) of the screw of the plasticating unit. Results will be presented from injection molding studies that compare the mixing action of the VIP-NRV to other mixing devices.