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Durethan BC 700 HTS has an elasticity modulus of only 210 MPa (conditioned). The non-reinforced material is perfect for manufacturing charge air tubes with integrated bellows as a single-material solution using extrusion blow moulding

One reason for this is its high melt stiffness, which ensures the extruded parison barely sags under its own weight.

The new polyamide 6 grade is also ideal for injection moulding of components with very strict toughness requirements and has already been successfully tested on series moulds. It can be used, for example, to injection mould multi-flexible hose connections.

THE new Durethan BC 700 HTS from specialty chemicals group Lanxess is an exceptionally soft polyamide 6 that has an elasticity modulus of only 210 MPa (conditioned). This non-reinforced material is perfect for manufacturing charge air tubes with integrated bellows as a single-material solution using extrusion blow moulding.

“This gives processors a cost-effective alternative to sequential coextrusion involving two polyamides of differing hardness, which is more time-consuming and sensitive in terms of the process employed,” explained Dr. Günter Margraf, product developer at LANXESS. The new material is so soft that it also has excellent sealing properties. This made it possible for prototype charge air tubes made from it to be fl ange-mounted to charge air coolers and air intake manifolds using just one bracket without leaks occurring. The need for additional sealing rings was thus eliminated.

There is a trend towards supercharged engines with exhaust gas recirculation to cut fuel consumption and thus CO² emissions. Charge air tubes with integrated bellows compensate for the relative movements of these engines and assembly tolerances. As a result of exhaust gas recirculation, the charge air tubes need to be highly resistant to exhaust gas and blow-by gas condensates.

Lanxess has conducted tests using the new polyamide 6 grade in accordance with the OEM testing regulations. These showed that the material is more resistant to oils, fuels and acidic condensates than thermoplastic polyester elastomers and elastomer block copolyamides which are also used for blow moulding charge air tubes in series production. The new material has already been successfully tested on series moulds for charge air tubes with several customers, confirming its excellent processing properties in extrusion blow moulding.

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The versatility of Progressive Components’ DT core system will suit the South African market as it enables moulders to use a ‘Multi Utility Mould Base’ where the cores are changed depending on the product being run – that is, without having to remove the mould from the injection moulding machine

Progressive Components’ new DT collapsible cores

ALTERNATIVE approaches and cost-saving ideas are helping mould makers win more moulding projects.
One solution being employed for those requiring complicated undercuts or unscrewing is the ‘DT’ core from Progressive Components.
The DT core is a positive, mechanically-actuated collapsible core that eliminates the cycle times of complex gear and rack systems, resulting in a simplified ‘pen-shut’ tool.
DT Cores offer other benefits:
• patented quick-lock feature allows removal and servicing of the core unit whilst the

mould is still in the injection moulding machine;
• compact design allows for tighter cavity spacing, enabling the use of a smaller PIM machine or more cavities versus a comparably-sized gear and rack mould base;
• ejector system is eliminated by utilizing the mould’s opening for actuation, resulting in a very compact height, which is advantageous in stack moulds while also allowing installation on the mould’s cavity half.
The DT cores are available in four standard sizes to match common industry cap diameters, custom sizes are also available.
• Progressive Components is represented in South Africa by Mould & Die Solutions, phone 021 555 2701.

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1. Roto guys – Gary Lategan of Roto Solutions (right) keeps his finger on the pulse! The TempLogger man visits most of the rotational moulding shows around the world. At the K he was comparing notes with Mukesh Ambani of Infra Industries of India, who is the chairman of the Asian roto association, StAR
www.infraindustries.com

2. Johan van Wyk and Vanessa Wilson-Trollip of Plastamid visited the stand of their principal DuPont, where they were hosted by the colourfully and unmistakably attired Mariusz Makowski of DuPont Poland and Klaus Bender of DuPont Deutschland

3. Canadian thermoformer – Jerome Romkey and Georg Nemeskéri of GN Thermoforming

Equipment of Nova Scotia, Canada, showed off some of the company’s new technology, including a unique plug drive system with twin-servo motors and a rotary-driven toggle on its GN 760 machine.
The drive is more compact, reducing the height of the machine, and also delivers better control of the plug; GN is represented by BRE Sustainable Packaging

4. Man of the match? No, not quite, but Tony Duss of Alplas was certainly welcomed on the
Arburg stand by Chris Oberem of Hestico, the Arburg agent in SA. Arburg, one of the oldest injection moulding makers which has exhibited at the K shows since the fi rst event in 1952, encountered surprisingly strong demand for its systems this year

5. Sito Safran and Yaacov Gozani of Sysmetric stand. A supplier of material feeding systems, dosing units, line control systems and management software, Sysmetric technology has become increasingly popular in South Africa Sysmetric is represented by Trollope Machinery
www.sysmetric-ltd.com

6. Slitter-rewinder – Kody Equipment of India
focused specifi cally on its area of expertise, that of slitter-rewinding technology, and showed its latest system, a Nuzen S-737 unit. Here we see Chiranjeet Jani and Anubhav Mishra of Gujarat-based Kody.
www.kody.co.in

- SA Plastics, Composites & Rubber magazine