An example of our flexibility is shown in the plastic industry where we designed a solution that would provide additional functionality to an existing plastic injection moulding machine. The existing machines were operated by electromechanically powered actuators and additional functionality was required for the opening and closing of the moulds. The solution was provided through a mobile unit that was designed and manufactured to operate auxiliary cylinders on multiple plastic injection moulding machines in a clean room environment.

At the beginning of 2014, McRaes Global was engaged to upgrade the Platen on a 3600 tonne extrusion press. As a part of the overall upgrade, we redesigned the hydraulic control system to confirm to the upgraded operating parameters. This included an upgrade in the manifolds for the control circuit, the manufacture and installation of an auxiliary hydraulic power unit and the installation of 300 metres of pipe and tubing.

McRaes Global has designed, manufactured and commissioned a skin pass surface preparation system on a continuous process galvanising line in New Zealand’s largest steel mill. This project eliminated costly break­downs, reduced wastage and improved the quality of the finished product. The Power Unit was specifically designed to operate two high tonnage cylinders, controlling and powering finishing rollers to obtain a finished surface on a steel product line. The electronic closed loop servo valves control system fed by digital operated pumps, synchronised the movement of two high tonnage cylinders. When the desired height is obtained the pumps switch over to a pressure controlled system thereby obtaining the required force. One of the unique features of this design was the development of a control system that can change from position to pressure during the metal coating process.