The dilemma of post-press digitalization
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The British four Birmingham IPEX 2002 group is definitely a digital exhibition in addition to the printing exhibition. The female guide on the IPEXIA-IPEX website will also confirm this to us. And the more precise statement is that many DRUPA 2000 has appeared in the transformation of printing equipment that has undergone a major transformation of digital technology. When IPEX 2002 is held, it will officially launch its mature model in the market.
An important question that arises is, where is the postpress process in this revolution? To be honest, I thought it was in a dilemma.
Postpress automation technology
We are not going to discuss too much about technology here. At IPEX At the 2002 show, manufacturers will show how they can solve all the problems of digital post-press technology, especially in full-color printing, if you need to deal with toner layers or digital inks with special care to avoid leaving on the prints. There are scratches and so on.
We can also look forward to the IPEX The traditional postpress equipment introduced in 2002 will have more shaftless, controlled by the servo, rather than the gearbox, giving greater flexibility, especially in the machine configuration, and saving Maintenance costs. In addition, with the exception of most processing programs that are close to their physical speed limits (the final printing speed of the press can only be the speed at which the paper is actually transported), many new postpress equipment are not only at the front end, but also from the middle to the lower end. Both will be fully self-service.
For postpress equipment, automatic operation basically means electronic control of the preparation of the installation, as well as the use of standard layouts such as CIP4.
At IPEX 2002, we can learn more about this. But it is worth noting that the post-press field is fully ready for automation.
dilemma
In fact, it is precisely because of automation that the post-press dilemma will emerge. The idea that "automatic control is essential to the future of post-print technology" is quite correct in itself. First, as the entire printing industry is moving toward tighter deadlines, shorter operating cycles, more work shifts, and the need to reduce set-up time, the post-press is also facing increasing pressure. . Second, automatic control can reduce labor and solve problems caused by the reduction of skilled operators.
On the other hand, although the electronic control of the manual operation of the manual is more accurate, it is difficult to fully automate the finishing equipment like the printing machine automation, which is difficult in terms of economic cost. In fact, adding such an expense to the machine is not always reasonable in reality.
Then we will have problems with the workflow. Automation means running online or in series, that is, producing the final finished document with minimal effort. However, in terms of layout, program flexibility and productivity, there is a phenomenon of interchangeability. For example, the maximum speed of an automated production line can only be the same as the slowest of the parts; if one component fails, the entire production line will stop. Experience tells us that more than one unit structure in the system never runs to the next process at the same time.
A more serious flaw may be the lack of flexibility. Whether you are a printer or a professional printer, this is a basic guideline. In order to gain more control, a printer that has established a complete production line needs to keep the equipment running as much as possible; and because of the “one-stop” trend, the professional after-sales business that has lost many businesses, Need to diversify your business.
Offline/nearline operation
The alternative is of course off-line, or what is now commonly referred to as "near-line" operation. You gain flexibility and use automated job preparation to reduce the number of machine setups, especially when using standard layouts such as CIP4. However, in this case, since the printed product has to be moved from one post-printing device to another, the time for delivery will be prolonged and the labor cost will increase. This is actually a waste, and this waste will increase as the number of processes increases.
Even so, people are starting to look for practical workflow solutions. The online or tandem connection scheme is fully automatic, or at least as fully automatic as possible; if the output form is predetermined in advance for a particular product type, then this solution is most likely to succeed. In other words, it is more important to obtain reliable and fast output relative to the full load operation of the line.
The opposite example is a printing business for profit. Here, in order to get the printing plant running at full capacity, you not only need the greatest flexibility, but also the highest productivity from the machine, in order to fully release their energy, take on extra work and increase turnover.
In such cases, the best solution is likely to be near-line or like a ROLL
DAVID, Director of Overseas Operations, SYSTEMS
The so-called "cell structure" production method described by SANDERSON. After studying the post-press market in more detail, he explained the difference between the unit structure production method and the traditional assembly line method by taking automobile manufacturing as an example:
“The car was once built on a long assembly line. However, if the assembly line stops at any point, it will have to stop at all points.”
“Today, most cars and other similar products have tended to be manufactured using unit structure production. For example, the assembly of an automotive transmission system can be done by two unit structures on the production line.
"This is a near-line rather than an online or Lvlian approach because the two units are not connected in series; even if one unit is stopped, the other will not stop."
Breakpoint in the job
The same method can also be applied to the printing industry, where a work interruption is made on the production line where the product can be moved to an offline equipment unit. The typical location of this breakpoint can be a place where prints can be moved to the next stage of production with the utmost ease, and the speed of production is measured by other criteria. ”
For example, when working with a printing press or a digital press, the speed is mainly measured in meters or how many sheets per minute or hour. However, once a product is formed, the speed is measured by how many units per minute or hour.
In other words, there is a natural break point here, especially where the usual speed differences occur. Although the maximum speed of a printing device can be accurately matched to a special post-printing device for a particular product, such as printing a 20-page booklet, as long as the number of pages in the booklet changes, it is either a printing press or Postpress equipment cannot operate at maximum capacity.
Using this natural breakpoint to turn online or tandem operations into near-line or off-line operations, it is possible to operate all machines at maximum speed and by making certain machines run longer than other machines. Or a certain type of equipment is more than the other to maintain the state of the existing technical equipment. This also means that existing post-press equipment can be used continuously.
In fact, the best way to produce a unit structure is to install multiple presses and multiple post-press equipment to maintain operational flexibility. Even two presses plus two postpress equipment can be of great benefit.
Finally there is an important piece of advice. As part of the current trend towards digital printing, IPEX2002 will be all about workflow, and its appeal will be how digital data is processed. However, it is the logistics that is organized, that is, the physical process of actually completing the printed matter, which will be different from previous printing exhibitions in successfully coping with more tight deadlines and economically handling the shortened product cycle. Features.