Energy-efficient coating as alternative to heater bands

An new heating system from Nordson Xaloy replaces conventional heater bands with a highly energy-efficient heater coating for maintaining melt uniformity in extrusion melt pipes and adapters, and eliminating downtime for removing melt “blowback” from injection nozzles, the company announced. 

Introduced as an injection barrel coating, the so-called SmartHeat system has since been successfully adapted for these additional uses:

? Injection nozzles. A SmartHeat coating can simplify maintenance and prevent downtime caused by blowback, the backward oozing of molten polymer (particularly when the seal is not tight) into the spaces between the heater bands and the nozzle. Available on new nozzles or as a retrofit, the coating is easily cleaned without need to stop production.

? Melt pipe or adapters. These components for transferring molten polymer from the extruder to downstream equipment can cover considerable distance, making it difficult to maintain melt uniformity. Replacing band heaters with the continuous coating of the SmartHeat system ensures a consistent temperature over extended lengths.   

The SmartHeat system consists of two layers of plasma-sprayed metallized ceramic with a nichrome wire wrap sandwiched in between, plus a thermal insulation cover. Because the heat from the wires is conducted throughout the ceramic material, the system raises the temperature of a machine component to target levels more quickly than with band heaters, maintains it more uniformly, and uses less energy. The tightly strapped thermal insulation wrap over the ceramic coating virtually eliminates heat losses to the workplace, saving on air conditioning costs and reducing the risk of operator injury.


Injection nozzles with SmartHeat coating (photo: Nordson)

4 years ago

IM machines subsidised by up to 10%

The French national energy provider EDF Entreprises will pay a state subsidy to companies procuring an electric or hybrid injection moulding machine in France, according to injection moulding machine manufacturer Arburg. The subsidy is based on the CEE energy saving certificate that was set down in law in 2005. The certificate, which is specially aimed at electric and hybrid injection moulding machines, was introduced at the end of 2013. EDF states that it will subsidise customers with regard to their investments in energy-efficient electric and hybrid machines by up to 10% of the purchase price. The bonus depends on the machine type, the installed power and the operating conditions. The subsidy is available at least until 31 December 2014, provided the machine is deployed in France.

Arburg cooperates with EDF Entreprises in this energy-saving campaign and states that the subsidy is available for electric and hybrid Allrounder machines from the Alldrive, Edrive and Hidrive. And Arburg offers further incentives: all customers who purchase a subsidised Allrounder also receive the preparation for use with an Integralpicker or three-axis Multilift robotic system free-of-charge.


4 years ago

Leistritz: Concept extruder with intelligent screw system

Leistritz introduced a world novelty at the K: a concept extruder with the high specific torque of 20Nm/cm³ and an intelligent screw system. The company says that this value can only be reached by means of compact screws, which can transfer such high torques. This special screw system also boasts the smartXX feature – a screw identification via an RFID chip (radio-frequency identification), which activates the full power of the drive unit. The extruder control transmits the according parameters to the frequency converter and the pneumatic safety coupling between drive and gearbox. The RFID chip can also store data by means of a read/write head. For example, logging of operation time, formulation data and storage of specific processing values can be carried out. In order to track the high torque, a new online torque measurement is installed which uses specifically magnetised sleeve couplings in combination with special measuring probes around the gear shafts.

The side stuffer LSB 52 is equipped with a modular screw set, similar to the extruder. The screws can be optionally equipped with internal cooling. Adapting the aggregate can be done via tie-rods which are guided through the gearbox and can be tightened without having to work in the hot and tight space around the processing unit. The same drive unit is used for the side degassing system LSE 52. The barrel is heated by means of heating cartridges and thermally separated from the rest of the parts by insulating plates. High tightness is facilitated by new shaft seals and enables the unit to realise higher vacuum levels and thus more efficient degassing of the melt.


4 years ago