Canadian Plastics

Overmolding enhanced with rotatable platen

Canadian Plastics   



A new, patent-pending horizontally rotating mold device apparently makes it possible to overmold a variety of multi-component parts with greater speed and efficiency. The process, which has been devel...

A new, patent-pending horizontally rotating mold device apparently makes it possible to overmold a variety of multi-component parts with greater speed and efficiency. The process, which has been developed by Ferromatik Milacron and Foboha GmbH Formenbau, utilizes a turning system installed between the traverses of a conventional horizontal injection molding machine. The rotating platen spins a two- or four-sided mold around a vertical axis. Milacron highlighted the technology recently at Plast-Ex. The turning module has been designed to be installed independently, without machine modification.

In a typical 24-cavity mold for the production of two-color parts for the cosmetic industry, for example, the technology is used to produce PP preforms in one color in a cavity at the first separating level. The mold is opened, turned 180 degrees, re-clamped, and the second color of PP is injected into the cavity of the second separating level, producing the two-color parts.

In the four-sided or “cube” configuration, four identical core sides are mounted on the rotating platen. In the first stage, the preforms are molded with the main injection unit. This set of cores is rotated 90 degrees, where it cools, or, alternatively, has parts or in-mold films inserted into it using robotics. The initial set of cores is rotated 90 degrees once more for overmolding, then rotated once more for ejection.

Ferromatik Milacron 905-319-1919Circle Reader Service No. 140

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