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Mobile milling service for Multiplex extrusion heads

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An increasing number of tire producers all over the world use KraussMaffei Berstorff's on-site milling service. The service package comprises face-milling of Multiplex extrusion dies that are subject to wear during production. The milling operation is conducted during scheduled maintenance and ensures perfect fitting of the profile extrusion tools to restore maximum line performance.

Wear- or damage-induced pressure losses

"Our mobile milling service is designed for tire producers faced with leaks in the die area are after having operated their extrusion heads for years on a 24/7 basis. The damaged areas result from increased wear produced by compounds with high silica shares or by cleaning operations due to frequent formulation and profile changes", explains Maik-Marcel Poppe, Head of KraussMaffei Berstorff's Technical Spare Parts Service. "This leads to pressure losses in the extrusion head and to undesired material leakage."

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The milling system was specifically designed for on-site high-precision machining of Multiplex extrusion heads with working widths ranging between 360 mm and 1050 mm. The system features brackets developed in-house that can be firmly connected with the extrusion heads and perfectly aligned. Various face-milling tools with a maximum number of cutting edges and adapted geometries ensure optimum chipping results and outstanding surface qualities.

Tire producers benefit from mobile milling service

Thanks to the milling operation, the specified tolerances can be met again. In addition, the sealing face of the die components is substantially improved, which reduces material and pressure losses. Upon completion of the milling process, KraussMaffei Berstorff issues a detailed measuring report so that the new coordinates can be considered in future extrusion tool or flow channel orders. The tire producer merely needs to provide lifting gear and power supply and heat up the head to extrusion temperature – that's it. Everything else will be taken care of by the KraussMaffei Berstorff service staff.

The mobile milling system is composed of milling heads in different sizes, brackets and milling tools. Stored in a maritime container, the milling system can be sent to production sites all around the globe within shortest time.

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