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TECHNICAL LIBRARY

Featuring more than 1,000 searchable technical papers, business features, country commentaries and fashion articles from editions of World Leather going back to 2002. The papers are categorised into nine topics to make the library easy to navigate.


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MACHINERY: Mechanical operations in leather making

53 Items Found

 
A future focused on innovation
Tanning group PrimeAsia hosted an open-house event at its tannery in Vietnam in March to celebrate the completion of an expansion project it began in 2015.
World Leather - Apr/May 2019
Arzignano water treatment plant
Just as the human digestive system is key to helping a person enjoy a long life, the effluent treatment plant operated by Acque del Chiampo in Arzignano plays a crucial role in maintaining the health of this important tanning district. Investment has ensured this should be the case for many years to come.
World Leather - Feb/Mar 2019
Challenges in China around VOCs and leather’s smell
New legislation in China imposes strict limits on emissions in car interiors, changing the requirements original equipment manufacturers face when testing automotive leather. In turn, this will have an impact on automotive leather manufacturers. Leather chemicals company Lanxess has shared details of some of the work it has done to help tanners respond effectively.
World Leather - Oct/Nov 2018
An innovative solution for low-temperature sludge drying
Italian machinery maker Cartigliano says its new drying machine is able to drastically reduce the volume of sludge products, opening the door for significant cost savings when it comes to its disposal.
World Leather - Aug/Sept 2018
greenLIFE 3: New renewable tanning technologies
Green Leather Industry for the Environment (greenLIFE) is a project run by a group of industry partners in Italy’s Arzignano tanning cluster. The project partners have committed to sharing their findings by publishing a series of papers in World Leather. The third of six greenLIFE articles comes courtesy of chemical supplier Ikem, one of the project’s partners.
World Leather - Apr/May 2017
Italian machinery builder Aletti leads in design and performance
Important technical development based upon the general success of wet buffing encouraged Aletti to now manufacture its well-known belt buffer (Velox) capable of both dry and wet buffing.
World Leather - Aug/Sept 2016
Machinery manufacturers respond to tanners’ demands
In spite of ongoing concerns about the raw materials market and demand for leather among finished product manufacturers and fashion brands, exhibitors at the 2016 Tanning Tech exhibition in Milan were able to conduct meaningful conversations about investment in new tanning machinery with senior figures in major tanning groups from different parts of the world.
World Leather - Apr/May 2016
Progressive engineering
North Italian machinery builder Bauce improves samm setting.
World Leather - Feb/Mar 2016
Robotics in leather making?
Italian machine builder Emmezeta brings it a step nearer.
World Leather - Dec/Jan 2015
A view of the Italian tannery machine construction industry
A week’s round of visits by our Machinery Consultant, close to the normal Italian summer shut-down, to most of the tannery machinery manufacturers based in the Arzignano cluster found ongoing technical progress, together with an encouraging commercial climate.
World Leather - Aug/Sept 2015
Leather companies hope to capitalise on ‘Made in Britain’ ethos
A raft of UK-based finished goods start-ups suggest demand is there – but can the tanning industry benefit, or does business go elsewhere?
World Leather - June/July 2015
Mercier Turner introduces the CNC Splitting Machine
The endless band knife leather splitting machine first conceived and built in the nineteenth century has ever since, proudly and justly, been regarded as the most sophisticated precision piece of equipment used in the leather making industry. Despite many changes since in structure, control, components, configuration, feeding and extraction systems, the actual mechanism of the splitting operation has remained much the same. What the Mercier Turner “Newsplit” machine offers is advanced control of the setting, feeding and precision in the splitting action itself. Profile and function of band knife, substance control mechanisms and transport systems is now precision programmed and controlled by Windows CNC.
World Leather - June/July 2015
Extra complexity after Lear makes its move
Relationships in the automotive supply chain have always been interesting, not least for tanners, who usually sell to original equipment manufacturers (OEMs) but supply finished leather or cut parts to specialist tier-one suppliers of seats, steering wheels and other car interior components. In 2014, one of these specialist tier-ones, Lear Corporation, added extra complexity and extra tension to this panorama by acquiring a major, global automotive tanning group, Eagle Ottawa. This article examines Lear’s reasons for taking this step and offers a view of the likely reaction among other tanners and tier-ones, and among OEMs in the months and years following the deal.
World Leather - Feb/Mar 2015
A cut above
Technology for cutting automotive leather is advancing all the time. There are powerful benefits to be gained from adopting the newest automated, computerised cutting systems, but, as this article suggests, if tanners are to make investment in this new technology effective, substantial change in the way their cutting teams work and think will be necessary.
World Leather - Feb/Mar 2015
Vacuum dryer technology full steam ahead
Italian tannery machinery business Escomar was founded in 1973 with an initial remit of trading in second hand re-built machines.
World Leather - Oct/Nov 2014
More versatility in pre-finishing machinery
Bergi, in particular, well established over a period of nearly fifty years in the development and manufacture of buffing, setting, dedusting and polishing machinery and then for its rollcoaters and rotary presses, is building new features into such equipment. Bertech, a younger member of the group, is drawing attention to its material handling equipment chiefly with stackers, and finished leather bundling machinery
World Leather - Apr/May 2014
Straight line reciprocating spray head machine reborn
New well-designed straight-line spraying offers advantages over the rotary systems. The French tannery machine builder Turner (also known as Mercier Turner) has seen a place for it in the leather finishing industry and has launched its modern version of such a spraying machine.
World Leather - Feb/Mar 2014
Tanning Tech 2013
Ever more focus upon leather production engineering
World Leather - Dec/Jan 2013
Cartigliano “just in time” technology. Part 2
This article highlights feeder, vacuum dryer and second wet stretching operations of the line.
World Leather - Aug/Sep 2012
Roller coater wash-dryer
A mechanical device available optionally on new Gemata Topstar roller coating machines and which also lends itself to be retrofitted to such existing machines.
World Leather - June/July 2012
Machines in the Tannery: Innovators & Research – Olcina Group
Spanish drum maker Olcina Group, the developer of the Cangilones drum system, has created Cangilones Next technology, the most revolutionary breakthrough in wet end processing in recent times.
World Leather - Feb/Mar 2012
Machines in the Tannery: Innovators & Research – Aletti
Italian tannery machinery company Aletti is a family business benefiting from extensive experience built up by three generations.
World Leather - Feb/Mar 2012
Machines in the Tannery: Innovators & Research – Alber
Founded in 1912, Alber is a leading manufacturer of splitting knives.
World Leather - Feb/Mar 2012
Machines in the Tannery: Innovators & Research – Bauce
Bauce is known for a comprehensive range of throughfeed sammy/setting machines.
World Leather - Feb/Mar 2012
Machines in the Tannery: Innovators & Research – Cartigliano
The background to the samm/setting and the wet stretching processes.
World Leather - Feb/Mar 2012
What happened to the buzz?
A round-up of the sentiment and innovations on display at Tanning-Tech 2011
World Leather - Feb/Mar 2012
Machines in the Tannery: Innovators & Research - Turner
The core business of the company is the production of classic tannery machinery, including fleshing, setting and shaving machines.
World Leather - Feb/Mar 2012
Deep shelf/slow speed processing vessels
Drums fitted with deep shelves and rotating at relatively slow speeds for wet processing hides into leather were first brought into use in the mid-1990s. Since that time the technology has evolved, and they are now being used for soaking, liming, tanning and retanning/dyeing.
World Leather - Dec/Jan 2010
Notes from Tanning Tech 2010
Indications from both exhibitors and visitors at Tanning Tech this year confirm a recovery of the global leather industry from the miserable levels of 2009 but still clearly a long way from pre-recessions conditions.
World Leather - Dec/Jan 2010
Drum milling comes of age
The evolution of the humble wooden dry drum gently tumbling leather to a sophisticated piece of machinery, using computer programming and control to produce determined leather characteristics, is yet another example of how far the development of tannery equipment engineering is taking the industry.
World Leather - Oct/Nov 2010
Wet Staking Explained
This operation is carried out by means of a vibration staking machine employing specially designed pin and hole action, different from the more generally adopted pin to pin staking system.
World Leather - Jun/Jul 2010
Comparisons between rollcoating and spraying
Comparisons between roll coating and spraying. Figures indicate that there are real savings to be made.
World Leather - Aug/Sep 2009
Innovation in the beamhouse
The conventional sulfide/lime system for unhairing and as part of the fibre-opening process has been in its existing form for approximately 150 years. However, appropriate treatment is required to avoid considerable pollution, and this is at the expense of the tanner. Moreover, the presence of sulfide restricts the use of by-products, and limits the way that effluent treatment can be rationalised. A new process is very desirable, and a new technique has been investigated. This is outlined in this paper together with the potential advantages that might be gained by a sulfide-free unhairing system, and the route that must be followed if rationalised processing is to be achieved.
World Leather - Feb/Mar 2009
Yield, quality and physical: Part two
FACTORS WITHIN WET PROCESSES AND OPERATIONS
World Leather - 08 - Dec/Jan 2008
Improving the traditional vegetable tanning process
Vegetable tanned leathers are typical of the high-quality leathers produced within the tanning district of Santa Croce sull’Arno, Italy. This is the oldest and most classic type of leather, combining the values of quality and tradition. To safeguard and improve these traditional leathers, it is recognised that the tanning industry not only needs to pay more attention to the process, but also employ new technologies to guarantee better production constancy.
World Leather - 01 - Feb/Mar 2008
A new aqueous transfer coating system for splits
Transfer coating of splits is a well-known and established process in leather finishing. The physical properties and the optical advantages are significant. At present the stateof- the-art technology is solvent-based systems, applied either via spraying technology or with rollers and doctor blades onto silicone matrices. These matrices have to be made individually and, because of the sensitivity, have to be handled and stored very carefully.
World Leather - 01 - Feb/Mar 2008
Laminating becomes more accessible
Italian tannery machinery manufacturer Bergi is focusing on the development and production of pre-finishing and finishing equipment and has recently widened the scope of its rotary ironing and embossing machines. Conventional perception of the leather laminating process is of complex, singlepurpose production lines needing large batch runs to justify their existence. Not so with the Transfer Kit recently developed by Bergi engineers.
World Leather - 01 - Feb/Mar 2008
Advances in the degreasing of hides
A new lipase degreasing product (1) is described that provides good degreasing when compared to the use of standard surfactants. It provides additional benefits such as improved grain tightness, better flatness, cleanliness of the hide, improved dyeing levelness, and has the potential to reduce fogging characteristics and improve hydrophobing. In addition, the replacement of surfactants by lipase offers significant ecological benefits within the degreasing process and in the subsequent treatment of wastewaters.
World Leather - 01 - Feb/Mar 2008
The manufacture and control of water-resistant leather
Many factors must be taken into account when manufacturing water-resistant leathers. This includes both the raw materials selection, and the processing to the finished state. Care must be taken to ensure that the achievements gained by careful materials procurement and leather manufacturing techniques are not diminished by inappropriate works practices.
World Leather - 01 - Feb/Mar 2008
Polypropylene drums: providing new opportunities within leather-making
Polypropylene revolutionised the drum concept, replacing wood as the preferred construction material, and now new interesting projects are destined to make radical changes to the future of tanning.
World Leather - 06 - Oct 2007
Wet (blue) behind the ears – the culture shock of joining the leather industry
Most tanners seem to have been lured into the leather industry in their formative years — those that stay the course have little inkling of just how strange it can seem to a newcomer. Most tannery engineers, however, will have learnt their trade elsewhere, and the peculiar blend of chemistry, production engineering and handicraft can be disturbingly strange to those brought up in the certainties and logic of mechanical engineering.
World Leather - Oct 2006
Back to Basics: A framework for leather manufacture - Essay 15
The splitting machine and its tools in operation.
World Leather - Aug/Sep 2006
The Machine Minder: Drying efficiently in the finishing department
As far as its external appearance goes, the drying tunnel of today is much the same as the drying tunnel of 20 or 30 years ago. but, although these are simple machines, they are by no means unsophisticated.
World Leather - Aug/Sep 2006
Back to Basics: A framework for leather manufacture. Essay 14
Reciprocating multi-roller machines: the shaving machine in operation.
World Leather - June/July 2006
Back to Basics: A framework for leather manufacture. Essay 13
Samming and setting in throughfeed. Both water removal (samming) and setting of leather by classic multi-roller machinery is labour intensive and this has been the driving force in the development of throughfeed equipment.
World Leather - May 2006
Control and traceability - yesterday's control but today's necessity
Over the last 20 years we have seen many different formats for tracing leather through the tannery and the Gibson Bass Hide System is now a well-recognised means of effectively stamping an identidfier on a hide or skin.
World Leather - May 2006
The Machine Minder: NCT
NCT advances further towards the fully automated tannery.
World Leather - May 2006
Back to Basics: A framework for leather manufacture. Essay 12
Reciprocating multi-roller machines: The fleshing machine in operation.
World Leather - April 2006
Back to Basics Essay 10: The behaviour of pieces in machine operations as a function of temperature and moisture content
An insight into the behaviour of mechanically-stressed pieces dependent on skin condition at different temperature and moisture levels.
World Leather - Dec/Jan 2005
Removing phospholipids from hides: Looking back on a “New perspective on wet processing”
The paper "New perspective on wet processing" was published in World Leather October/November 1993, in which the advantages offered by the removal of phospholipids were discussed. Given that the value of raw hides and leather selling prices - strongly influenced by area and quality - are so important to the tanner, perhaps it's time to re-evaluate this technology.
World Leather - Oct 2005
The milling drum – from blunt instrument to sophisticated process vessel
There are several areas in tannery machinery where the application of modern technology seems to have been an over-elaboration. The milling drum, however, is a real exception, where the application of modern sensors, control technology and automated handling has turned a blunt instrument into a sophisticated process vessel, capable of repeatedly reproducing subtle effects in the nature of the leather produced.
World Leather - Oct 2005
Hides and skins: Temperature and physical change
This article takes a look at the profound influence temperature has on the physical properties of hides and skins within every stage of leather manufacture.
World Leather - Aug/Sep 2005
Automated handling in the finishing area
The finishing area has always seen the greatest requirement for labour in the tannery. The rising cost of labour in developed countries, and the increasing difficulty of finding workers prepared to do monotonous, repetitive manual work, have been the impetus for many years to seek automated handling solutions. Mechanical stackers have been around in primitive forms over twenty years, but how have they advanced?
World Leather - Aug/Sep 2005

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