Move Over, Makeready
August 1999
|
Quick-change can happen on-line, off-line, or perhaps even somewhere in between.
By Susan Friedman
Clark Kent may have consistently favored an "off-line" retreat into a telephone booth for his legendary Superman "changeover," but quick-change makeready systems for today's presses are a little more fickle.
A supplier's idea of the fastest, most cost-effective job-changeover set-up can range from a completely self-contained system that never leaves the press, to a completely removable system, to one that can move a job off-line, but not away from the immediate printing area. Here's a look at several design rationales.
The inside story
Propheteer's standard approach to quick-change—an open print head that does not slide out or leave the press—is about as on-line as one can get. All components are individually quick-change, without tooling, and can be removed by lifting or via swing clamps, explains V.P. Mike Polkinghorne.
For a normal, water-based work environment, Polkinghorne believes the open print head approach is the most effective because room to work is built right into the design.
Comco's ProGlide, a sliding drawer technology first unveiled at CMM '97, was initially introduced as an option, but its popularity has led Comco to make the system standard on all Flexo-pack and Commander press designs, creating a line of presses rechristened ProGlide MSP (Multiple Substrate Printing), reports Marketing Manager Chris Faust.
The system features shuttle deck printing stations which house the ink pan, meter roller, anilox roll, doctor blade, and printing cylinder on linear bearings. One of the keys to ProGlide's appeal is that the stations slide out, but not off, Faust stresses, preventing wear and tear that can result from repeated removal and replacement of the print head. Because a self-contained drawer system harbors little need for extra hardware, it conserves valuable floor space and staff, he adds. To accommodate wider press widths, the system's height has been ergonomically adjusted to eliminate the need for overhead hoists or cranes.
A 10- or 11-color press with ProGlide stations may cost about 4 percent more than comparable presses, but operators can knock more than 50 percent off makeready time with the system, Faust notes.
Outer...limits?
Frank Laughlin, V.P. sales and marketing for Chromas Technologies, sees the drawer approach as "pretty much standard." Chromas' quick-change drawer system allows on-press changeovers as fast as three minutes per print station, for 7 1/2" to 26 1/2" press widths.
Laughlin believes the removable cartridge is the next logical step in quick-change's evolution, citing Chromas' Instant Change Technology (ICT). Its inking system, pan, doctor blade, and anilox roll are mounted on a cassette that can be slid on to an off-line makeready cart which also carries plate cylinders, ink pumps, and gauging tools. A new job, already set up on the cart, can be slid on-press as the old one is removed. Cartridges can also accommodate dies and hot stamping units, while keeping total changeover time to 10 minutes.
By Susan Friedman
Clark Kent may have consistently favored an "off-line" retreat into a telephone booth for his legendary Superman "changeover," but quick-change makeready systems for today's presses are a little more fickle.
A supplier's idea of the fastest, most cost-effective job-changeover set-up can range from a completely self-contained system that never leaves the press, to a completely removable system, to one that can move a job off-line, but not away from the immediate printing area. Here's a look at several design rationales.
The inside story
Propheteer's standard approach to quick-change—an open print head that does not slide out or leave the press—is about as on-line as one can get. All components are individually quick-change, without tooling, and can be removed by lifting or via swing clamps, explains V.P. Mike Polkinghorne.
For a normal, water-based work environment, Polkinghorne believes the open print head approach is the most effective because room to work is built right into the design.
Comco's ProGlide, a sliding drawer technology first unveiled at CMM '97, was initially introduced as an option, but its popularity has led Comco to make the system standard on all Flexo-pack and Commander press designs, creating a line of presses rechristened ProGlide MSP (Multiple Substrate Printing), reports Marketing Manager Chris Faust.
The system features shuttle deck printing stations which house the ink pan, meter roller, anilox roll, doctor blade, and printing cylinder on linear bearings. One of the keys to ProGlide's appeal is that the stations slide out, but not off, Faust stresses, preventing wear and tear that can result from repeated removal and replacement of the print head. Because a self-contained drawer system harbors little need for extra hardware, it conserves valuable floor space and staff, he adds. To accommodate wider press widths, the system's height has been ergonomically adjusted to eliminate the need for overhead hoists or cranes.
A 10- or 11-color press with ProGlide stations may cost about 4 percent more than comparable presses, but operators can knock more than 50 percent off makeready time with the system, Faust notes.
Outer...limits?
Frank Laughlin, V.P. sales and marketing for Chromas Technologies, sees the drawer approach as "pretty much standard." Chromas' quick-change drawer system allows on-press changeovers as fast as three minutes per print station, for 7 1/2" to 26 1/2" press widths.
Laughlin believes the removable cartridge is the next logical step in quick-change's evolution, citing Chromas' Instant Change Technology (ICT). Its inking system, pan, doctor blade, and anilox roll are mounted on a cassette that can be slid on to an off-line makeready cart which also carries plate cylinders, ink pumps, and gauging tools. A new job, already set up on the cart, can be slid on-press as the old one is removed. Cartridges can also accommodate dies and hot stamping units, while keeping total changeover time to 10 minutes.
|
Diversifying with Packaging Services: Unlocking Hidden Profit Potential
Common-Sense Flexography