||Technology in Australia 1788-1988
Table of Contents
I 1788 - State Of The Art In Textile Technology
II Australian Textiles - The Early Days
III Australian Textiles - The 20th Century
IV Australian Textiles - To Date
i Narrow-tape Weaving Loom and the Nyguard Zipper
ii Vacuum Packaging System for Knitting Yarns
iii 'Computer' Socks
iv 'Jumbo Cakes' (Large Cheeses of Spun Yarn)
v Out-Draw Texturing - Nylon
vi 'Bored-Out' Pack
vii Computer Control of Heat-Setting Conditions for Synthetic Yarns
'Jumbo Cakes' (Large Cheeses of Spun Yarn)In the standard technology of synthetic fibre manufacture, the process involves at least two stages. In the first stage, extruded yarn of low molecular orientation is wound up as 'cheeses' or 'cakes'. These cakes are lagged and then processed in the second stage to produce packages of fully drawn yarn (high molecular orientation).
This procedure is labour intensive as the individual cakes are manually 'doffed' (removed from machine), loaded on to buggies, transported to the next processing stage, loaded on to a creel and the machine strung up for subsequent processing.
Obviously the manufacture of larger cakes will substantially reduce the labour costs, and within certain limits the labour required is almost inversely proportional to the cake weight. There are, of course, practical limits to the size of cakes which can be manually handled. The ideal was to integrate the two processes and completely eliminate this labour cost, but this approach required new and expensive equipment, capable of 'spinning' yarn at very high speeds. It also suffered from a lack of flexibility for systems where a common spun feedstock was supplied to a number of secondary processes.
Fibremakers developed a technology for making the best of both worlds for some nylon processes. The spinning wind up was modified to allow the production of very large cakes, about ten times the size of conventional cakes (e.g. 50 kg instead of 5 kg). This change required the introduction of pneumatic handling equipment at spinning, because the cakes were too large for safe manual handling. To avoid the double handling associated with the conventional creeling of cakes for secondary processing, the transport buggies were re-designed to act as mobile sectional creels.
Organisations in Australian Science at Work - Fibremakers Pty Ltd
© 1988 Print Edition page 303, Online Edition 2000
Published by Australian Science and Technology Heritage Centre, using the Web Academic Resource Publisher