Difference between revisions of "Plastic film slitter rewinder"
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Revision as of 18:16, 8 December 2009
Plastic film slitter rewinders are usually the core part of a film converting line. Slitting and rewinding is the second last main process step of the plastic film converting process. The input material of the slitter rewinder,is roll-stock material. Slitter rewinders are used for different applications than plastic film as well, for example they can process paper, or any other film products. One of the most frequently used applications of the slitting rewinder machine is the plastic film processing.
The slitter rewinder has three main process steps that are the unwinding, the actual slitting and the rewinding. The slitting is needed for one of or both of the following: the film material needs to be trimmed or needs to be cut up, so narrow stripes of the material produced. Key part of the technology is the engineering solution that ensures that consistent density of the rewinded roll stock.
Crucial property of the machine is the speed it can be operated. Usually the input rollstock is much heavier and longer than the output rollstock. Never-the-less, the longer the output rollstock, the less the machine needs to be stopped for offloading the output rollstock.
Slitting machines are commonly classified by their rewinding design. In case of cantilever slitter rewinder, the offloading of the rewinded rollstock is manual. Center surface technology uses powered shafts that makes it possible that the rewinding shafts can take much heavier load and longer length of film than the cantilever, making it possible that the machine is stopped less often for offloading. Turret technology provides the highest level of automation for offloading between the three different technology. Key element of the machine is the slitting knife. The two main type of the knife are the so called razor in the air and the circular blade. Earlier requires less set-up time, while the later has longer life cycle and it can usually handle thicker materials than the earlier one. Also, slitter machine with a circular blade can usually run faster without compromising film tension or ruining quality of the print on the film.
The most common arrangement for rewinding that the output rollstock is rewinded on two shafts. Many times the film is slitted to several stripes and the stripes are split out between the two rewinding shafts. That ensures that between the rewinded rolls on a given shaft, there is a gap of the immediate neighboring stripe that is rewinded onto the other shaft.
Examples
- Standard cantilever slitter rewinder for slitting and rewinding a variety of materials.
- Enforced cantilever slitter rewinder: for producing high weight finish rolled-stock.
- Compact slitter rewinder for tight space slitting operation.
Market info
One of the North American plastic slitter rewinder machinery suppliers is Plastic Equipment Co.
See also Plastic Pouch Bag Making Machines by Plastic Equipment Co. in MyWikiBiz.
Businesses related to Poly Bag Making Machines will identify themselves by the following 5-digit NAICS codes:
References
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See also
plastic film slitter rewinder plastic film slitting machine cantilever slitting machine slitter rewinder equipment
