Crosrol
MK7 High Production Carding Machine
Ultimate Carding Power From The Carding Specialists
For over 60 years, Crosrol, the 'Carding Specialists' have been responsibly for almost every major development of Carding, From the legendary 'Crossed Rollers' , to the world's most successful card, the MK4, Crosrol continues to lead the world in Carding technology.
Our research and development efforts have always been dedicated to the process of Carding, with all its vital implications for the preceding and following operations in the process of converting fibres into yarn, Only with true dedication and many years of experience can the process of Carding be fully understood leading ultimately to the optimum Card.
Carding Area:
Crosrol, the world's first Carding machine manufacturer (1983) to recognize the significant benefits of increasing the carding length around the cylinder fully appreciate the delicate balance of maximizing Carding with preserving the natural characteristics of the fiber.
The MK7 further optimizes this important aspect of the card with an increased Post-carding area resulting in a combined 245° carding length—significantly increased when compared to previous models of Crosrol Cards.
Carding Speed:
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 - for higher than any other Card manufacturer.
This combination of stability and ultra-high surface speeds significantly contribute to enhanced Carding power together with high throughput rates.
Centrifugal Force:
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 wend today.
Crosrol Carding Power:
With the innovative design of the Crosrol MK7 card, ultimate Carding power can be finally delivered, the delicate yet complex relationship between Carding area, Carding speed and Centrifugal force been further optimized. this together with the Crosrol renowned precision and stability of the critical Carding elements ensures that the MK7 is the perfect solution for today's high efficiency spinning units.
Ultimate Carding power, achieved by optimising the three key influential factors of the Carding process,
n Carding Area
n Carding Speed
n Centrifugal Force
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 optimum quality.
The new MK7 card makes this type of methodology redundant, with the unique Crosrol waste control systems, Dial-in Operating Speeds and modular Carding arrangements, all material dependant settings can be changed within minutes allowing for complete Card settings to be changed faster than the Bale lay-down of a Blowroom line.
Modular Card 'A' Frame Construction
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
Unrestricted under card access far 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.
Revolving Flat Systems
The interaction between revolving Flats and the Cylinder is at the heart of every Card, Throughout Crosrol history we have always focused on this key function, devoting many years of product development to pursue perfect flats performance. In consequence the Crosrol revolving flat systems are distinguished in the field of Carding.
Each individual revolving flat can be height adjusted by means of a fine pitched adjusting screw incorporated into each end of the flat bar. This unique feature ensures that the height of the whole set of revolving bats is kept uniformed resulting in the highest possible accuracy of the Flat to Cylinder setting for ensured and effective combing and cleaning of the fibres. The height adjusting feature eliminates the need for pre-grinding thus prolonging wire life to the maximum.
Unique high strength industrial plastic Fiat chains incorporating precision Ball bearings running on Hardened Cylinder bends eliminates wear and the need for lubrication thus ensuring consistent settings and low maintenance during the life of the Card_
Rotary Flats stripping rollers (driven directly from the cylinder) clean flats efficiently, keeping Flat wires in the optimum condition for ultimate Carding.
Single point Flats to Cylinder setting device (SPS) enables the vital Cylinder to Flats setting to be changed within seconds without the need for highly skilled Card technicians by means of a centrally operated lever, The actual flats setting is clearly ascertained by means of a graduated scale. This optional feature (SPS) gives greater flexibility to the spinning operation in optimizing the Cards performance tor any given blend of fiber.
Setting of the revolving flats on a Card is a laborious highly skilled task, The new Crosrol 'Rat setting control' device (supplied as standard) significantly reduces not only the time required for re-setting of the Flats after wire maintenance but ensures consistent and accurate settings are always achieved,
Modular Stationary Flat Systems
The new Crosrol Stationary Flat systems incorporating the unique modular concept of interchangeable Stationary Flats with highly effective aerodynamic waste extraction units allowing for multiple processing arrangements to be quickly configured to suit all conceivable material applications.
In conjunction with the patented Dial-in' waste control systems, the Crosrol Pre & Post Carding arrangements make significant contributions to better sliver quality with a significant increase in the operating life of Carding wires.
Aerodynamic waste extraction systems consisting of a newly contoured control plate for high efficiency airflow, working in conjunction with the Crosrol patented Trash-knife and recently developed interlocking 'quick-removal' waste extraction system.
Crosrol patented 'Dial-in' waste control systems give precise control over the amounts of Trash, Short Fibre and micro-dust extracted.These unique devices give the ability to optimize waste removal settings quickly and easily without the need to halt carding production. The simple colour coded dial systems allow Card
operators to make precision adjustments to maximize fiber yield from any Card within seconds.
In addition to precision adjustment screws at each end of all stationary Flat bars, The Post-carding Flats incorporate a further four fine adjusting points along the length of each bar making setting more precise and uniformed in this critical area of the Card.
All Carding Trash knives have Crosrol patented round-profile blade edge for gently fiber preserving operation and are treated with molybdenum disulphide for maximum durability.
High Efficiency Multi-point Waste Removal System
For today's high production carding machines efficient waste extraction becomes critical to the overall machines 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.
The permanent suction system of the MK? card has been further optimised to ensure a low air requirement of only 3700 math 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.
A typical Cotton processing MK7 Card can be fitted with up to 15 separate Waste extraction points, With in-depth development precise air-flow and sub-pressures have been accurately calculated for each of the 15 extraction points so as to ensure the exact air amount is directed to the specific extraction point.
The integral ABS moulded ducts with transparent sections provide an insight into the suction hoods at all limes, even whilst the card is in operation.
Crosrol Magna-duct connections enable suction ducts to be rapidly removed and replaced without the need for any tools, a simple series of magnetic clasps hold each duct arm rigidly in position.
Aluminium waste ducts are fully integrated into the machines construction, eliminating the need for access restricting support plates.
With the Crosrol high cylinder centrifugal forces to liberate trash particles, Crosrol patented 'Dial-in' waste control systems and high efficiency multi-point waste removal system a clean sliver, together with maximum fibre yield and maintenance free operation is assured.
Pivoting Feed Control
Crosrol's new pivoting feed plate arrangement ensures of a wide range of staple lengths are easily catered for.
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.
Wire covered teed 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.
Crosrol Web Control and Transfer
Web control is one of the final processes carried out by the carding machine, and as such has a great Influence on the quality of the sliver produced. Poor web control at this point can undo all the previous good work done throughout the carding process. Crosrol has carried out extensive developments in this area The benefits of which can now be seen on MK-7.
Highly efficient tubular extrusions provide effective waste removal, but with reduced extraction requirements. A further benefit is the increased time between routine cleaning intervals.
Fully enclosed DPoffer with friction free coating on undercasing prevents the possible build up of fibre obstructions and eliminates web disruption.
Low maintenance extruded waste removal plenums around the stripping roller and Highspeed roller prevent the accumulation of fly and dust, whilst providing effective extraction for waste fibres.
Any remaining trash in the web is then crushed by Crosrol' s crossed rollers crushing system.
Long term auto levelling is an integral part of the web collection system providing effective sliver weight control from the card feed roller to the overlapping sensing rollers.
Adjustable Taker-In Waste Control
Taker In waste is the most costly area of fibre loss at the card.Effective waste control in this area is vital to the quality of your end product.
Our new modular Taker-In waste control unit provides excellent control over waste percentage and fibre yield.The unit is simply installed I removed and can be replaced after routine maintenance without the need for re setting.
Twin mote knifes remove heavy trash and motes. In Running adjustment of these features ensures minimum good fibre loss, whilst maintaining optimum cleaning efficiency.The inclusion of a carding segment liberates smaller trash and provides additional opening and fibre alignment for transfer to the Cylinder.
Highly efficient tubular extrusions provide effective waste removal, with reduced significantly extraction requirements and increased time between routine cleaning intervals.resulting in a cleaner working environment.
Card Control With Integrated Auto-levelling Systems
The MK7 card utilizes the latest generation of European PLC based control systems from Siemens, The ultra-high processing capabilities together with inherent stability ensure rapid and consistent processing of machine data.
Industrial type full colour Touch screen operating display (800 x 480 Pixels) working in conjunction with eight touch-sensitive keys provide a largely language-independent operation via generally understandably symbols, diagrams and pictures.
Continuously updating graphical status reports on a clearly structured series of screens allow for complete machine operating data including production rates, operating speeds, quality information (Sliver weight & CV%) and routine service requirements to be displayed.
Greatly enhanced diagnostic's, clear pictorial indication of precise nature and location of fault with suggested remedial actions.
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 detected by ultra-reliable over-lapping rollers, using precision rotary transducer technology; insensitive to delivery speed, and un-affected by fibre type or atmospheric changes. Long-term correction via inverter-controlled drive to Card feed roll.
Mid-term closed-loop auto-leveller augments the long-term system attenuating sliver irregularities at wavelengths as short as 1 meter, Patented system uses torque-sensing controller at Taker-in to detect variations in in-feed volume, and adjusts the feed roll speed accordingly.
Sensing after the correction point gives inherent stability of Closed-loop control (Controllers which measure variation at the feed roll jibed are open-loop so lack this inherent stability).
Hard wired Electrical control cabinet located at the rear of the machine for ease of maintenance, Extensive use of European origin electrical components for long-term reliability, specific cabinet layout ensuring heat generating components are remotely located from machine control systems together with in-built cooling devices for optimum operation under extreme conditions of temperature and humidity prevailing in spinning mills.
Integrated Chute Feed
The unique simplicity of the Crosrol Chute Feed makes for total reliability and ease of operation, with easy access for machine operation and periodic maintenance. The newly improved unit is fully integrated into the construction of the MK7 Card this together with the new control systems, significant improvements are seen over previous models.
Fully Integrated chute feed with dial-in settings from card controller ensures uniformed density for optimum batt regularity and much improved sliver variation
Feed to upper (reserve) chamber controlled by air pressure, fibre transport fan (CFMTF) is inverter controlled, to facilitate line balancing.
Inverter controlled wire covered feed roll providing continuous feed from the upper (reserve) chamber via a spirally pinned opening roller to the lower (ball formation) chamber,
Material !evel in the lower (batt formation) chamber controlled by Digital pressure monitoring transducer so as to maintain a constant feed density to the Card, this new method significantly reduces sliver variation resulting in a 5 meter CV% of <1,5% in many applications. All excess air and dust extracted to central filter, only clean air is used for fibre transportation.
Chute Delivery roll driven by means of a Owning belt rather than Chain to further improve Card CV% and reduce routine maintenance.
Different blends can be fed from each end of the Chute line, to varying numbers of cards for total flexibility, Interconnecting feed & extraction ducting between the chute feed units is supplied as standard significantly reducing installation costs.
Crosrol Remote Planetary Coiler
Sliver preparation for downstream processes is a critical component in the overall running efficiency of any spinning unit. We aim to eliminate unnecessary production stoppages due to can sliver breaks. Crosrol's planetary toiler provides an efficient presentation of sliver with It's unique over centre coiling system providing even and consistent coil lay downs, which result in a smooth take up of the sliver at the following process.
Unique over — centre Planetary coiling action ensures optimum can storage capacity.
Simple Installation No underfloor driving mechanism required.
Remote capability enables multiple floor positions
Inverter controlled dial in drafts settings for slow speed and can change, eliminates CV peaks
Newly designed drive mechanism, incorporating Inverter controlled motor with robust gearbox and detent safely clutch. Dual timing belt drives result in a low maintenance high efficiency unit.
Linear Automatic can changing requires less floor space than carousel type.
(Manual can change also available)
MK7 Card Specification
MK7 Floor Plan Dimensions
