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Winding & Converting Equipment
Slitter/Rewinders
Parkinson offers a complete line of Dusenbery brand offline slitter/rewinders that perform a secondary resizing function to convert parent rolls of web materials into narrower finished rolls. These machines range from entry-level models to highly specialized and automated designs.
- Center Winders:
Most commonly configured as duplex differential rewinds, these machines are used to economically slit and rewind a variety of materials onto individual cores that are loaded onto two driven winding shafts. Center winding machines are ideal for materials that can not tolerate contact pressure while being wound. Advanced controls allow complete control of the winding process to insure optimum finished packages. At higher operating speeds and for those materials unaffected by contact pressure, top riding (or layon) rollers can be provided to eliminate entrained air and provide additional process flexibility for more demanding applications.
- Center-Surface Winders:
These duplex machines have either full width winding shafts or individual arms with driven chucks that provide center assist to the surface winding operation. Depending on the model, the finished rolls are wound onto cores placed either onto winding shafts or between sets of core chucks mounted to sets of pivoting arms. Adjustments to the two forces that control the winding process, nip loading and torque delivered to the center of each core, are made to suit the characteristics of the material being processed. This degree of control flexibility provides successful processing of materials with surface frictions that vary from the highest to the lowest.
- Surface Winders:
Surface winders rely on the friction between the driven rollers and the web to provide the required tension and driving force to wind the material into finished rolls. Additional nip loading is required to insure traction and control finished roll formation. These machines are used primarily for paper, nonwovens, and composites. Standard models range from machines that convert master rolls into small diameter finished packages at very high cycle rates to machines that produce very large diameter finished rolls, not normally possible on a center winder.
- Single Knife Cutters:
Sometimes referred to as "baloney slicers", these machines slice a finished roll of material into narrow rolls, one at a time, using a large rotary blade. Typical use is for adhesive tapes, non-wovens, and rubber materials.
Winders
- Center Turret Winders:
Designed for continuous center winding of plastic films, textiles, and nonwovens on multiple shafts, or in some cases, a shaftless design. Center turret winders are available with both automatic and manual cut over.
- Fixed Position Center Winders:
Winders designed to center wind plastic, textiles, and nonwovens on a single shaft or shaftless if required.
- Surface Winders:
Winders that offer continuous surface winding of paper, textiles and nonwovens. Designs range in complexity from a simple valley winder to winders with the ability of automatic cut and transfer.
- Horizontal Surface Winders:
A winder in which the initial winding of the material begins on the top of a winding drum and as material builds on the winding mandrel it grows in a vertical direction until being trasnferred to a second winding position or main winding position. Within the main widing position as the material builds in diameter, the package moves horizontally away from the main winding drum on a precision guided carriage assembly. Nip force between the material and main winding drum is accomplished through the use of a low friction pneumatic assembly within the carriage and is electronically controlled and monitored. These machines can actually control roll density within the main winding position and can create very soft package for customers whose material is crush sensitive.
Unwinds
- Fixed Position Unwinds:
A fixed position unwind consists of a single unwind spindle and can be either a cantilevered design or supported at both ends. Tension is usually controlled by the use of a pneumatic brake that applies resistance to a shaft that is mechanically coupled to the material support. Tension can also be controlled through the use of a motor and gear reducer coupled to the shaft as opposed to a brake. These units, typically called a driven unwind, control tension by controlling the resistant torque of the motor through use of a programmable drive module.
- Turret Unwinds:
This unwinder continually unwinds parent rolls on multiple shafts or directly from the core. Turret unwinds are available with automatic splicing mechanisms for continuous operations.
Precision Slitting Systems
- Score Slitter:
Parkinson Technologies offers score slitting for mid-web speed applications up to 1000 fpm. Score slitting utilizes a top knife that crushes the web between the blade and a hardened anvil roll underneath.
- Razor Slitter:
Razor slitting systems are designed to be used on plastic film. The razor slitting systems provide unprecedented safety features that allow the operator to remove and replace razors without interruption.
- Shear Slitter:
Shear slitting systems are designed to handle the most demanding applications. The systems consist of a top knife positioned against a bottom knife that perform as enlarged scissors. These slitting systems produce the best edge quality and enable longer blade life.
Web Handling Auxiliary Equipment
- Shaft Extractors:
Parkinson Technologies offers a full line of semi or fully automatic shaft extractors that are specifically tailored to individual needs.
- Shaft Storage System:
These systems are usually provided in conjunction with a shaft extractor and can also be integrated into Parkinson winding equipment as a space saving option.
- Tilt-to-floor Doff Tables:
These tilt tables are used to gently lower finished sets or packages to the floor or directly onto a pallet.
- Queue Stands:
Roll storage stands are available to provide roll staging when a continuous process is needed. Parkinson offers fully automated systems that will load waiting rolls directly into the unwind equipment.
- Stationary and Mobile Lift Tables:
Parkinson's multi-purpose lift tables are designed specifically for individual roll handling needs. These specialized automated systems remove finished packages from the winding equipmentand in some cases, help recore and reload.
- Precision Guided Web Accumulators:
Engineered to meet any specific need, Parkinson accumulators can also accommodate any height and length requirements.
- Web Inspection Stations:
An area where the operator stands and the web is visually inspected for any defects. There is also the option of integrating computer controlled optical equipment that can sense defects in certain materials.
- Manual Splice Stations:
An area where the web can be stopped in order to cut out the bad material and then splice the material back together eliminating defective product within a roll.
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