Product category:
Industrial Motors
News Release from: SSD Parvex | Subject: Torque motors
Edited by the Engineeringtalk Editorial
Team on 27 November 2007
Torque motors take new approach to
extrusion
Parker torque motor technology is key to a new generation of "direct drive" extruders.
Parker torque motor technology has been chosen by Italian plastics machinery builder Ghioldi, to run its new generation of "direct drive" extruders Ordinarily obliged to get in touch with different suppliers for motors, gearboxes and drives, the Italian manufacturer is now in a position to deal with a single partner
Based on brushless technology, Parker torque motors are innovative "direct drive" solutions optimised to deliver high torques at low speeds, without any additional mechanical transmission system.
Especially designed to replace traditional gearbox-based systems on extruders of power up to 320kW, these motors integrate various dedicated features, such as: a built-in thrust bearing to support back pressure from the screw, as well as specific mechanisms allowing to easily remove the screw from the motor.
According to Filippo Ghioldi, the company's Sales Director for Italy and foreign trade: "We made the decision to undertake this important technological breakthrough following the idea of proposing something different and advantageous for us and our customers".
"Not only gearbox suppression leads to reduced maintenance costs, because there are less components subject to wear, but it also results into significant energy savings".
"Moreover, dimensions are reduced and assembly is simplified".
Other important advantages of Parker torque motors are the result of a lower vibration level.
The first consequence is a reduction in audible noise.
Conforming with the new European directive 2003/10/CE, Parker torque motors never exceed the 80dBA limit over which employers are compelled to undertake protective measures.
The second consequence is an improvement of production quality: " Some materials, especially those used in the coloured film production, are made with a mixture of different polymers".
"Due to the vibration of traditional motors, the heavier material goes down in the hopper faster".
"This may result in quality problems for films that present different colour stains".
"But this can also cause problems during other manufacturing phases, especially during welding or other treatments".
"The torque motor solves that problem", explains Ghioldi.
The Italian manufacturer strongly believes that within 5 years, torque motor technology will gain market share in the plastics sector, driven by increasing pressure on energy consumption and maintenance costs.
Ghioldi has already started to convince new customers: "We recently sold two plants in South America, for which it has been fundamental to confirm the possibility of saving energy and achieving a return on investment within 18 months", explains Ghioldi.
Recognised as a worldwide leader for the quality and the versatility of its equipment, Ghioldi has designed, manufactured and sold plastics extrusion machinery since 1962.
Specialising in blown and cast film extrusion lines, Ghioldi's field of expertise covers mono and co-extrusion (up to seven layers) processes, involving a large range of polyethylene, polypropylenes as well as new biodegradable and water-soluble materials.
For the drives part, Ghioldi has been working closely with SSD Drives division of Parker Hannifin Corporation for a long time.
Says Ghioldi: "We use SSD Drives inverter Series 690P and 650 for winders, tows and extruders".
"Our business relationship has always been good, and the technical service for us and for our customer has always been efficient".
When the decision was made to develop a new extruder range taking advantages of Parker torque motors, the two companies worked particularly closely together.
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