MACHINERY | SCREWS AND BARRELS
PHOTO: CPM EXTRUSION GROUP
Above: OEM suppliers need to hold more stock components to meet demands for shorter leadtimes, says CPM
placed on plastic compounds, which is seeing more fibre-reinforced and heavily filled formula- tions. This means that wear protection is an issue of ever increasing importance for compound produc- ers. The new 72HA lining material is an iron-based powder-metallurgical alloy with high carbon and chrome content and is manufactured using HIP technology, with each liner through-hardened. The chemical composition is said to provide very good wear, abrasion and corrosion protection. The company says the wear resistant 72HA
material does not compromise its ability to produce precision liner geometries. It says it is able to optimise the position of the cooling and cartridge heater bores to achieve efficient tem- perature control while a special contact collar ensures correct axial positioning of the liner inside the housing to avoid the leaks that could occur due to different thermal expansion of the liner and housing.
Below: Steer offers it latest Fractional Lobe Processor
technology on its Omega extruder line
Addressing leadtimes According to Jürgen Stoll, Product Manager Components and Inside Sales Manager Spare Parts at Extricom Extrusion (now part of CPM Extrusion Group), the market is really struggling with lead times for screws and barrels at present. “Having delivery times of less than ten weeks is rare,” he says. “With customers focused on getting their spare parts for screws and barrels as
soon as possible to optimise their production, we are trying to tackle the problem by offering some in-demand products to the market off the shelf. We currently have spare parts in stock for our CXE lines, which are identical to ZSK and MC machines. For these machines, we also have material avail- able to reduce delivery times to around eight weeks. In addition, we have drilled blanks available to further reduce delivery times. We also have many barrels and inliners available, including vautid lined barrels in closed and open versions, plus through-hardened tool-steel combi block barrels.”
On the technical front, colleague Tom Urban, Sales Manager Spare Parts at CPM Century Extrusion says that customers are continuing to ask what new materials are available to make wear components last longer, as well as getting higher throughputs on existing machines. “Customers want improved mixing and kneading along with increased output from their extruders,” he says. “CPM Extrusion Group has developed a high performance screw and kneading elements line to solve this issue. These new extruder screw geom- etries create better products in less time. We also manufacture many different barrel and barrel liner designs and configurations. One design is a barrel with added ventilation, letting unwanted air out of the extruder while letting raw materi- als in. This also provides better cooling of the material in the extruder.” Urban also believes that suppliers of screws,
barrels and shafts will need to consider their lead times and have more products in stock and to meet the shorter lead times needed to support customer up-time. “Industry demands are increasing and as an OEM supplier we need to be flexible and respond to this,” he says. “The CPM Extrusion Group recognises the industry needs and we continue to make investments and initiatives to respond to those needs.” Compounding equipment manufacturer Steer
has introduced the next generation of its Omega Fractional Lobe Processor (FLP). The company says that the Omega co-rotating twin-screw extruder provides great control over the amount of work
70 COMPOUNDING WORLD | August 2018
www.compoundingworld.com
PHOTO: STEER
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