Product news | Fakuma 2014 review
KM automates control of the moulding process
KraussMaffei showed its Adaptive Process Control (APC) system, which is claimed to automatically compensate for fluctuations in the injection moulding process, in operation on its stand at Fakuma. The patented technology is
claimed to adjust the changeo- ver point and the holding pressure profile in each cycle to the current melt viscosity and flow resistance in the mould, making it possible to compensate for deviations and maintain tighter limits on article weight variation in the following cycle APC is intended to come
into play once the mould setter has determined the optimum parameters for production. The technology is designed to stabilise the process, keeping
the specified shot weight consistent during production if, for example, material viscosity changes. “APC is applicable to all
applications because shot weight is critical for all applications,” said Dr Hans Ulrich Golz, president of the injection moulding segment at KraussMaffei. “We have demonstrated it in many applications with customers. We cannot say that we can solve all the problems but our tests show with this we can offer a much safer production process.” The technology can provide benefits when restarting a machine after a stoppage by precisely detecting to what extent the material viscosity has changed and adapting the
changeover point and holding pressure profile to suit. Even changes in the machine, such as signs of wear on the screw and barrel or the closing behaviour of the non-return valve, can be automatically compensated for. KraussMaffei also claims that APC can contribute to improved energy efficiency, as it allows barrel temperatures and back pressures to be maintained at levels closer to the optimum. Similarly, production can be maintained at tighter levels of control when running high levels of recyclate. APC is available as on option on all of KraussMaffei’s hydraulic and all-electric machines. ❙
www.kraussmaffei.com
Evonik targets new PMMA at automotive glazing projects
Evonik introduced a new high transparency injection moulding grade of PMMA developed for automotive glazing applications. The impact-modified
Plexiglas Resist AG100 provides the good UV and weathering performance expected of a PMMA resin while displaying much lower levels of reversible haze, which the company said has long been a problem with conven- tional impact modified PMMA grades when exposed to high
www.injectionworld.com
or low temperatures. According to Evonik, the
new resin has passed the requirements of ECE R43 for use in automotive rear side windows, rear windows and roof elements. Due to its high level of UV resistance it only
needs the application of an anti-abrasion hard coat – PC requires protection both from UV and abrasion – and a number of ECE R43 compliant one-step coatings are said to be available. ❙
www.evonik.com
Clearly colourful medical TPEs
Hexpol TPE subsidiary Elasto Sweden showed new additions to its Mediprene range of TPEs for the medical device industry that combine high transparency with vibrant colour. Colour is being increas-
ingly used in the medical sector to identify critical parts and to differentiate products, such as tubing or face masks. The company said colour is also often desired in transparent medical devices to disguise the yellowing that occurs by gamma sterilisation. The masterbatches used
in the new transparent TPE grades are fully compliant with USP Class VI or corresponding parts of ISO 10993.
“With the Mediprene TPE
compounds, the benefits of colour and crystal clear transparency are united, opening up further design and brand identification possibilities for the medical device market,” said Elasto Sweden medical technical manager Niklas Ottosson. ❙
www.hexpoltpe.com
November/December 2014 | INJECTION WORLD 21
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