For over 60 years, Crosrol, the carding specialist, has been responsible for almost every major development in carding. From the legendary ‘crossed rollers’ to the world’s most successful card, the MK4, Crosrol continues to lead the world in carding technology. Only with true dedication and many years of experience can the process of carding be fully understood, leading ultimately to the optimum card.
Crosrol’s MK7 further optimizes the important aspect of the card with an increased post-carding area resulting in a combined 245o carding length – significantly increased when compared to previous models of Crosrol cards. Ultimate carding speed is achieved only by design, the unique construction of the Crosrol cylinder – the world’s first to be constructed from steel rather than cast iron for ultimate stability, together with its unique 40” (1016mm) diameter operating at surface speeds of over 42.5 meter per second far higher than any other card manufacturer. This combination of stability and ultra-high surface speeds significantly contributes to enhanced carding power together with high throughout rates.
Centrifugal force is probably the least understood factor influencing the carding machine but one of the most important factors when determining the total carding power, especially when calculating the trash and nep removal capabilities. Centrifugal force generated by a card is calculated by examining the complex relationship between surface speed and radial distance from the rotating axis (cylinder diameter). Crosrol’s innovative 40” (1016mm) diameter card cylinder, together with its ultra-high surface speeds, results in the highest generation of centrifugal forces available in the world.
With the innovative design of the Crosrol MK7 card, the ultimate carding power can be finally delivered and the delicate yet complex relationship of the carding area, carding speed and centrifugal force further optimized. This, together with the Crosrol’s renowned precision and stability of the critical carding elements, ensures that the MK7 is the perfect solution for today’s high efficiency spinning units.
Technological superiority and innovative concepts, with exceptional low owning and operating costs, make the MK7 card the logical solution for your carding requirements.
In today’s ever-changing world, flexibility becomes the key to operating a successful business. Spinning units find that their customer’s demands for yarn types and qualities are changing on an almost daily basis. Due to the very nature of a carding machine, making changes to the machine set-up has been both labor-intensive and time-consuming. Therefore, most spinning units opt for ‘universal’ settings rather than material specific settings so as to obtain maximum fiber yield and quality.
The newly designed high-strength A frame ensures maximum engineering design strength, maximum stability at cylinder speeds of up to 900rpm, proven 3-point mounting position for cylinder roller, and unrestricted under card access for cleaning and maintenance. Pivoting setting points ensure accurate and consistent settings.
Lateral setting movement is replaced with arc movements, which results in greater control over the setting procedures. Small accurate adjustments to settings can be confidently carried out.
The interaction between revolving flats and the cylinder is at the heart of every card. Crosrol has always focused on this key function, devoting many years of product development to pursue perfect flats performance. In consequence, Crosrol revolving flat systems have their special role in carding.
Revolutionary flats mounting and driving systems ensure maintenance-free performance and friction-free operation resulting in ultra-high operating speeds so critical to effective carding at today’s ultra-high production rates.
Crosrol revolving flats are precision set to a uniform height and do not require pre-grinding, thus preserving the most durable part of the wire point.
The new Crosrol stationary flat systems incorporating the unique modular concept of interchangeable stationary flats with highly effective aerodynamic waste extraction units allow for multiple processing arrangements to be quickly configured to suit all conceivable material applications. The unique modular concept for rapid optimisation of pre & post-carding zones ensures effective opening and cleaning with maximum fibre yield, whatever your application.
For today’s high production carding machines efficient waste extraction becomes critical to the overall machine performance. Sliver quality is directly effected by a cards extraction system, the new Crosrol waste extraction system optimizes airflows with low negative pressures in order to remove trash and dust particles efficiently.
Unlike other card manufacturers who have combined waste extraction, Crosrol’s separation of ‘clean’ and ‘dirty’ card wastes ensures significant advantages to reprocessing of waste fibres leading to major savings.
The permanent suction system of the MK7 card has been further optimised to ensure a low air requirement of only 3700 m3/h with minimal operating sub-pressure of only 750 Pa. These values are significantly lower than many other alternative systems presently available, resulting in major cost savings to be made in terms of filtration.
Crosrol’s new pivoting feed plate arrangement ensures a wide range of staple lengths are easily catered to. Inverted feed plate reduces short fibre generation, whilst at the same time improving the opening capabilities of the taker-in region even at higher production rates. The wire covered feed roller ensures optimum fibre control.
This simple, accurate and easily adjustable setting system allows infinite adjustment of the feed plate nip point between 20 and 40mm from the feed roller / taker-in material transfer point. This new innovation not only ensures efficient fibre opening, but also protects fibre parameters whatever the staple length.
MK7 carding machines incorporate both closed-loop long-term and mid-term auto-levelling as part of standard equipment, with programmable correction limits to suit mill specific quality standards. Long-term sliver variations are detected by ultra-reliable over-lapping rollers, using precision rotary transducer technology, insensitive to delivery speed, and unaffected by fibre type or atmospheric changes.
For details, contact: Texpert Marketing, 11, Periyar Nagar, Nr. Anna Nagar, Peelamedu Post, Coimbatore-641004, Email: sales@texpert.in