Articles
Outsourcing Association to be founded in Central and Eastern Europe.
Iryna Dubeniyk -
Outsourcing Associated bodies and Branch Associations from the Baltics, Ukraine, Hungary, Bulgaria and Romania established Central and Eastern European Outsourcing Association (CEEOA)...
Knowing your web line
Timothy J Walker -
Web lines are the backbone of the converting industry — the equipment used in converting paper, film, foil, and other webs into valued product. In ...
What is the most serious customer oversight?
Dr. David Roisum -
The most serious customer oversight is not understanding the customer. Only a few groups are specifically tasked with meeting with and understanding the customer. These could be product development, marketing, sales or service....
What is the most serious web business oversight?
Dr. David Roisum -
The most serious business oversight is not knowing as much as possible about the economics of a plant. This would include the types and costs of waste, such as off-spec material, seconds, reworks, trim, grade change and, most importantly, customer returns....
Nip deflection
Timothy J Walker -
X ’em out! Nipped rollers are vital to many web processes, including coating, laminating, embossing, calendaring, and winding. Two nipped rollers have a lot more ...
Nip entry angles
Timothy J Walker -
Web handling is about transport and delivery, getting from point A to point B, without damaging the product. It is relatively easy to move a ...
Working well under pressure
Timothy J Walker -
Do you work well under pressure? How you react is ...
Laminate curl
Timothy J Walker -
Whatever happened to scrolls? Scrolls were good business until about 200 A.D. when the book came along. What is it about books that made them ...
Handling Laminates
Timothy J Walker -
Delaminating — undesired separation within a multilayer product — is a major problem for many converters. ...
Differential Shaft Applications
Dr. David Roisum -
Differential shafts are common, almost standard, on the myriad duplex winders found in converting. Most of the machine builders configure the winder controls to be ...
Differential Shaft Concerns
Dr. David Roisum -
Machine builders and process owners should be concerned about applying the right tool for the right job. The machine builder must check many engineer ...
Differential Rewinding: Part three
Timothy J Walker -
in part three, we continue our diagnosis of differential rewinding. The last two columns reviewed the whys and hows of differential rewinding, but before filling ...
Differential Rewinding: Part two
Timothy J Walker -
In part one, we made the case for using differential rewinding shafts. This month, let's talk about what differentiates one differential shaft from another. ...
Differential Rewinding: Part one
Timothy J Walker -
Don't try to do ten things at once. While this is good advice, sometimes ten things come flying at you at once. If you focus ...
Bowed rollers: Part one
Timothy J Walker -
In pharmaceuticals, certain drugs are controlled substances: They are available to the public but require a doctor’s prescription and strict instructions for proper use. In ...
Tips on antiwrinkle rollers
Timothy J Walker -
Antiwrinkle rollers, like antiperspirants and anti-inflammatories, have a name that implies a cure to your problem. ...
Shear wrinkles: Signs
Timothy J Walker -
Your web is talking to you. Not out loud but in a form of sign language. It's saying, “Oh, I'm shifting to the right (or ...
Tracking wrinkles: Part two
Timothy J Walker -
The easiest way to explain roller diameter variation tracking is to walk you through the chain of events. ...
Tracking wrinkles: Part one
Timothy J Walker -
When traffic is heavy on a multi-lane freeway, staying in your lane is critical. We trust the other drivers in the cars next to us ...
Spiral rollers
Timothy J Walker -
Spreading and antiwrinkle rollers are great tools for web handlers. ...
Spreader rollers
Timothy J Walker -
Spreader rollers are important tools for web handlers with two main applications. First, they can spread a web after slitting, creating a gap between slit ...
Bowed rollers: Part two
Timothy J Walker -
In part one, we picked up our prescription for a bowed roller and read the instructions and warning label. But what’s in that bottle? How ...
How can I improve productivity? - Part I
Dr. David Roisum -
Improving productivity means increasing the saleable output from an existing line. Sometimes this can be done by merely changing operating procedures. Other times equipment changes ...
How can I improve productivity? - Part II
Dr. David Roisum -
In part one, we showed how measuring productivity means a lot more than knowing how long it took to produce a roll, box or skid. ...
How can I reduce waste?
Dr. David Roisum -
Waste and rejects have a large effect on the economics of a converting plant. Small changes here can easily mean the difference between profit and ...
Why is lighting so important?
Dr. David Roisum -
One of my clients had obtained budgeting for nearly $1 million dollars to upgrade their paper machine winder. I was asked in to help suggest ...
What makes a good converting team?
Dr. David Roisum -
A large converter recently invited me in to teach my web school. I mentioned that the seminar was targeted for process engineers, scientists as well ...
Why is neatness so important?
Dr. David Roisum -
I have been in hundreds of plants and seen thousands of machines. While there is no universal indicator of process health, I have observed the ...
Cleanliness is next to...
Timothy J Walker -
What is your definition of clean? What people think of as "clean enough" in their homes is staggeringly different. Hopefully, your definition for your converting ...
Harmonic analysis
Timothy J Walker -
On Bravo network’s "Inside the Actor’s Studio," James Lipton asks each guest, "What sound or noise do you love?" followed by "What sound or noise ...
Is your slitter up and running?
Timothy J Walker -
Walk by any slitter and more likely than not, it won’t be running. Why? Besides having no input material or no demand for slitting, your ...
Internal process expert, or outsource?
Timothy J Walker -
Outsourcing and supplier management have been hot topics over the last decade. Using external resources can provide budget flexibility for economic ups and downs as ...
Concave rollers: Good or bad?
Timothy J Walker -
I’m always amazed when a wrinkle problem can be solved with a few feet of masking tape. Got some nasty wrinkles on a roller? Some ...
Ridges and Grooves
Timothy J Walker -
I've previously presented the cases for rough over smooth in preventing slip and scratching problems. Even though rough surfaces have a bad reputation, rough is ...
Rough or Smooth?
Timothy J Walker -
Rough necks, rough language, rough drafts, and golf balls in the rough. Smooth operator, smooth as a baby’s bottom, smooth sailing, and smooth moves. Smooth ...
The Friction Circle
Timothy J Walker -
Doing doughnuts — this was the term my high school friends called the art of driving around in snow-covered parking lots, spinning your back tires ...
Scratching and Slip
Timothy J Walker -
What percent slippage in idler roller speed relative to web speed is required to create scratches? ...
Air Lubrication and controlling your web
Timothy J Walker -
Lubrication occurs when a gas or liquid separates or reduces the contact between two surfaces. Lubrication is used intentionally to reduce wear and increase the ...
Traction: Get a grip
Timothy J Walker -
Rollers are the hands of web handling — the hands we use to grip the web to meet our goals for web speed, position, and ...
Slitting debris
Timothy J Walker -
Dust and debris are a common but unwanted side product of slitting. Slitting debris comprises the small particles that break off a product's edge during ...
Stripe slitting
Timothy J Walker -
Lines make life more difficult. Remember coloring as a child. At first it was just you, your crayons, white paper, and free expression. Life was ...
Dancer Rollers: The good, the bad, and the ugly
Timothy J Walker -
In my tension quiz, I gave out five points if your process had a calibrated tension transducer roller. Those of you with dancer rollers might ...
Tension control quiz: Pass or fail?
Timothy J Walker -
Today's column is a pop quiz on web tensioning. Feel free to work as a team on the answers. If you score poorly, don't worry, ...
Tensioning your web
Timothy J Walker -
What is the first step of most converting processes? Tensioning the web. ...
Why measuring tension is so important
Timothy J Walker -
I'm in love with a new gadget that makes cooking easier. It's the electronic temperature probe. These have been available for manufacturing applications for years, ...
Tension control: Mapping a line
Timothy J Walker -
Web handling defects often can be traced back to a specific location in your web line. Web tension at that location is always a prime ...
Why is web tension important?
Timothy J Walker -
There are many benefits to tensioning a web in any converting process. Here's the four that I think about: 1. Tensioning can ...
What is web tension?
Timothy J Walker -
Tension can be viewed as a force, a force per width, or as a tensile stress. ...
How can I adjust tension to improve winding?
Dr. David Roisum -
Every winder is equipped with an adjustable tension. Most winders can taper this tension automatically as the roll diameter builds. Some winders can even program a curve. Whether we have a simple setpoint, linear taper or arbitrary curve, we must choose how to set the tension....
Center or surface winding
Timothy J Walker -
What is the best way to drive a winding roll? You have three choices: from the surface, from the center, or both. ...
Internal roll pressure
Timothy J Walker -
Too much pressure inside a roll means more wound roll problems: Adhesive layers ooze, nonwoven and other crush-sensitive products don’t bounce back, photographic coatings fog, ...
Unwinding: Part one
Timothy J Walker -
Converting productivity is a race to see how much material we can get through our process. Instead of a marathon, with one runner going the ...
Unwinding: Part two
Timothy J Walker -
We are halfway through our roll-to-roll relay race of the unwinding process. Our rolls are loaded, spliced, and ready to run. To complete the unwinding ...
Is your product cinching?
Timothy J Walker -
The expression “it's a cinch” usually means something is easy, as easy as tightening a belt. However, as we learned last month, cinching is not ...
Cinching, what?
Timothy J Walker -
In today's economic climate, belt tightening sounds like a fiscally wise move. Belt tightening, also known as cinching, is good for budgets, trash bags, and ...
Pyrimids and Wound Rolls
Timothy J Walker -
What comes to mind when you think about the pyramids? First, the pyramids have survived the test of time. Second, they have a distinct and ...
How can I troubleshoot and treat winding defects?
Dr. David Roisum -
The most useful classification of wound roll defects is by tension. All defects fall into one of the following categories: tight roll, loose roll, taper and other. Examples of tight roll defects would be blocking or corrugations....
Can I hide defects by winding loose?
Dr. David Roisum -
It is well known that winding looser (soft) will reduce the frequency and severity of some types of wound roll defects. Examples would be ridges, webs stretched into bagginess over ridges and corrugations....
How does gage profile affect winding?
Dr. David Roisum -
Gage uniformity has a profound affect on wound roll quality. In fact, gage variation can sometimes be so overwhelming that nothing can be done at the winder to effectively deal with it. Gage uniformity has a profound affect on wound roll quality. In fact, gage variation can sometimes be so overwhelming that nothing can be done at the winder to effectively deal with it. ...
The Untouchables: Part three
Timothy J Walker -
Over the last two articles, I have reviewed why some webs demand “U Can't Touch This” and web line options for true touch-free web handling. ...
The Untouchables: Part two
Timothy J Walker -
In part one, we covered the web and process motives for touch-free web handling. This month we'll begin to review web line options for “Can't ...
The Untouchables: Part one
Timothy J Walker -
More than a decade ago, rapper MC Hammer made famous forever the line “U Can't Touch This.” I've worked with converters who use this phrase ...
Bending: it's a bad thing
Timothy J Walker -
Bending a web is like bending a pencil or a wire. A little bending is no problem, but if you go too far, something will ...
Who Likes Film?
Timothy J Walker -
Customers like films because they are cool. Films can be clear, thin, shiny, clean, and elastic. Product designers like films because they are functional. Films ...
Twisting and shouting
Timothy J Walker -
A wrinkle is the web’s equivalent of a shout—stop it, you’re hurting me! To avoid your web shouting at you, think about how to apply ...
Parallel Entry
Timothy J Walker -
Parallel flow usually is a good thing. In driving your car down the road, if you and the other drivers agree to keep parallel to ...
**New Convertech air shaft beats the Tidland D4 Differential shaft in performance**
janderson -
Updates to Convertech's differential winding air shaft allow it to slit down to 1/2 inch at tensions from under .15 PLI. The new updates handily beat the Tidland D4 Differential shaft in performance, and especially delivery time. www.convertech.com...
New Jersey Expanding Shaft Manufacturer Delivers in Just a Few Weeks; Beats Major Competition's Deliver Time by a Wide Margin
janderson -
In challenging economic times, reducing downtime can make a crucial difference for any company. Convertech, Inc. has kept its customers up and running with fast delivery; faster than any other manufacturer in the converting industry (just a few weeks)....
Convertech's Air Roll Lock Differential Shaft Ensures More Consistent Winding, and Roll ...
janderson -
WHARTON, New Jersey - Convertech's GlideLock(TM) clutched rollers surpass competitors products by providing an internal slip mechanism to control tensions from .15PLI. Now able ...
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on
21 August, 2010 08:10:40
thank you for that interesting post
Pdf Se
on
20 August, 2010 07:05:27
This is a great post. I'll try to make the calculations. I'm very much intrigued about the results I'll get. Thanks for so many ways ...
Kalo Paidi
on
09 August, 2010 12:46:40
Thanks...nice article and great share...
Lucy Lew
on
08 August, 2010 03:14:55
Your blog is really excellent. It inspires the readers who have that great desire to lead a better and happier life. Thanks for sharing this ...
Rain Sanders
on
06 July, 2010 12:43:20
This is a very interesting post. Undoubtedly, you have talent in finding analogy. You did it very masterfully!