CI Flexo Printing Machine China: The Sleeve Question
Most people arrive at a CI flexo printing machine china supplier with a colour count and a width in mind, and both numbers turn out to be the easy part. The question that actually decides whether the press is worth buying happens four hours into the first production run, when somebody has to change a printing plate.
That question is about sleeve format, and it is the reason a ci flexo printing machine china supplier's answer tells you more than any specification table will.
On a conventional flexo press the plate is glued to a steel or aluminium cylinder, and changing a colour means stripping old adhesive, cleaning residue, mounting a new plate and waiting for it to settle. On a sleeve-format press the plate is a photosensitive resin sleeve that inflates onto an air-expanding mandrel. Same job, different physics, and the difference shows up as minutes instead of a shift.
The Master Series heavy packaging CI flexo printing machine is built around that difference, and the rest of its design follows from it. Here is what the specification covers, what it deliberately leaves open, and what to fix in writing before the machine is built. Our position on the machine is stated plainly elsewhere on this site: XIAOPAI - Wenzhou Xiaopai Electric Power Technology - works with long-established Chinese manufacturers of this class of equipment rather than building presses in-house, which means the sheet you read here is the manufacturer's own sheet and not a marketing rewrite.
THE SLEEVE FORMAT IS THE FIRST DECISION, NOT THE LAST
The published changeover figure is 3 minutes to replace a set of plate rollers and ceramic anilox rollers, and the datasheet is honest that this depends on how experienced the operator is. Take the figure as a trained-operator number, not a guarantee.
What makes that possible is the roller construction. Both the plate roller and the ceramic anilox roller use the sleeve format rather than a glued or taped cylinder, so the only step is inflating and releasing a sleeve on a mandrel. There is no adhesive to clean and no settling time to wait for.
Ask any supplier for this number without asking how the roller is built, and you will get an answer you cannot use. A supplier with a sleeve press will tell you three minutes and then explain the mandrel. A supplier with glued cylinders will quote you an optimistic figure and change the subject, because the honest number for them is hours.
This matters more on a heavy packaging line than it looks. Heavy duty FFS film runs long, and a colour change in the middle of a production run is not a scheduled event. Every avoidable minute at the press is a minute the line is not selling.
WHAT THE CI LAYOUT ACTUALLY GIVES YOU
CI means central impression: the printing units are arranged around a single central cylinder rather than in a straight stack. On this four-colour Master Series the units sit as satellites around that cylinder, driven by a gearless electronic shaft. That layout is what keeps the impression consistent across the full width, and it is the reason a CI flexo press holds registration while the line is speeding up or slowing down.
Published registration on this machine is ±0.1mm, and the datasheet states that this accuracy is maintained during speed increase and speed decrease, not only at steady state. That sentence matters more than the number. Most spec sheets quote a static figure; a figure that survives the acceleration ramp is a different engineering claim.
The press is a multifunctional servo machine: printing, embossing and folding on one machine. Embossing depth is published as 0.2-0.5mm, folding depth as 0-100mm, and the shift angle as 0-45 degrees. The embossing unit has its own drive control with manual and automatic conversion, and it holds synchronisation of ±0.5% against the printing units.
Ink and plate are also specified. The press runs water-based ink and solvent-based environmentally friendly ink, on photosensitive resin plates. Doctor blade is 0.2mm x 35mm, and the double-sided tape for plate mounting is 0.38mm.
TENSION CONTROL IS WHERE A HEAVY LINE ACTUALLY FAILS
On a heavy packaging line the failure mode is rarely the print. It is the web. Film diameter changes as the roll builds, tension drifts as the material warms, and a press with open-loop tension will show it as a register error that comes and goes through the run.
The Master Series runs closed-loop tension control, and the architecture is published: tension sensor to PLC to servo controller, giving constant tension across the synchronised sections of the whole machine. Synchronisation error between process sections is stated as ≤0.5%. Roll diameter is detected by an ultrasonic non-contact device, and servo motor speed is adjusted from that real-time diameter data.
Two smaller numbers are worth reading, because they are the ones that decide how a web actually behaves. Edge detection accuracy is ±0.2mm with a response speed of ≤50ms and a deviation correction stroke of ±50mm. Automatic roll change takes ≤8 seconds on a full φ1500mm roll, across an applicable roll diameter range of φ600-1500mm.
Published unwind figures: maximum coil diameter φ1500mm, 6-inch air shaft, automatic tension range 5-20kg per full width.
THE NUMBERS THIS SPECIFICATION GIVES, AND THE ONES IT DOES NOT
The web handling figures are published as a set rather than as a headline. The press takes a maximum feeding width of 800MM and prints to a maximum printing width of 700MM, with a printing length adjustable from 360 to 900mm. Four colours, a maximum roll diameter of φ1500MM, a 6-inch air shaft and an automatic tension range of 5-20kg per full width. Installed power is 100kw, the machine weighs 25000KGS, and it stands 15.2 x 3.5 x 4m.
Those figures are the ci flexo printing machine china spec for this particular machine, and they are worth reading as a machine identity rather than as a shopping list. Every ci flexo printing machine china supplier will quote you a width and a colour count; the number that tells you whether the machine is right is the roll diameter and the tension range, because those are what your film inventory and your web handling have to live with.
Maximum production speed is given as 150m/min, qualified in the same line by the characteristics of the raw material, the ink and the complexity of the pattern.
That qualifier on the speed figure is worth keeping in mind. 150m/min is a ceiling, not a guarantee, and anyone who quotes it without the qualifier is quoting you the ceiling. On heavy FFS film with a demanding artwork, the realistic average runs below it, and the person who sets your expectations honestly is the one worth dealing with.
What is not on the sheet matters as much. There is no published figure here for overall ink consumption, no drying energy consumption per hour, and no tolerance statement on the folding unit beyond the 0-100mm depth. If those three numbers are what your business case depends on, ask for them before signing rather than estimating them yourself.
One point of disclosure, because it matters when you compare offers. This specification is for a Master Series 4-colour 800mm machine. Wider and higher colour-count CI presses exist in this class, and they are a different machine on different terms and a different lead time. Do not assume this sheet covers them; ask for the sheet that matches the machine you are actually buying.
WHAT THE FACTORY NEEDS FROM YOU BEFORE THE MACHINE IS BUILT
This is the section most quotations skip and most installations discover too late. The preparation sheet is specific, and every item on it is your responsibility, not the supplier's.
Foundation: must carry a load of 22 tons per square meter, flat, with no earthquake source nearby. Incoming power: 3-phase 380V 5-core, with the cable sized to the model, and you supply the cable from the power source to the machine. Compressed air: ≥0.6mpa, with you supplying a 10MM air pipe from the air source. Hydraulic oil is supplied with the machine; top up with 46# hydraulic oil if it runs short.
Then the logistics items that catch people out. Confirm the transport route from the factory. Confirm the factory door will take the transport dimensions of the largest shipped part. Confirm the building height is at least 1m higher than the total height of the machine. Plan for 2-4 people to assist the engineer during installation, and provide a 10-ton forklift sized to the installed model.
Pre-printing consumables are also yours to supply: printing plates, 0.38mm double-sided tape for plate mounting, water-based ink appropriate to the material, a doctor blade, and material for the factory test print. Test printing before shipment uses four colour plates and standard material; running your own artwork or your own material through the machine for the trial costs extra, so decide who supplies the design before the order, not after. If you have never run a CI flexo printing machine china line before, ask the XIAOPAI engineer doing the commissioning to walk your own product through the trial rather than the standard test material.
THE COMMERCIAL TERMS, AND WHAT THE WARRANTY DOES NOT COVER
Price term is FOB Ningbo China. Payment is 30% deposit by T/T with 70% T/T before shipment, or L/C at sight. Delivery time is within 150 working days after the deposit is received. Packing is standard film package, with a wooden case available as an option. Warranty runs 1 year from the date you receive the machine.
On installation, one engineer is sent to install, commission the line and train your workers over 20 days. The buyer covers the engineer's salary, visa, round-trip air tickets, accommodation, local transport, food, medical and safety costs. One detail to settle early: the engineer's daily rate is written differently in the quotation section and the after-sales section of the same document, so confirm which figure your contract is built on rather than assuming the lower one applies.
The warranty period is 12 months after completion of erection, and no later than 18 months after shipment. It excludes parts that are regular spares, and parts damaged by normal wear, abnormal operation, improper maintenance or inadequate civil works. The seller is not liable for production loss.
That last exclusion is normal, and it is also the clause that decides whether you read the installation preparation sheet carefully. Inadequate civil works sits inside the warranty exclusion, which means a foundation that was never sized to the machine converts a warranty question into a civil engineering question, and the machine warranty will not be the thing that answers it.
Before you compare terms, it is worth reading the surrounding machine pages too: our solventless laminating line is the downstream process that usually follows printing, and reading it before you order tells you whether your printing spec has to account for a downstream process at all. Neither page tells you anything the quotation sheet does not; they just save you the search.
ONE LINE FOR THE RECORD
The Master Series CI flexo printing machine from XIAOPAI - Wenzhou Xiaopai Electric Power Technology, which works with long-established Chinese manufacturers of this class of equipment - is a 4-color full servo sleeve press with 800mm maximum feeding width, 700mm maximum printing width, 150m/min maximum speed, ±0.1mm registration, 100kw power and 25000kg machine weight. Sleeve plate and ceramic anilox changeover is published at 3 minutes; registration holds ±0.1mm through speed changes; tension is closed-loop with ≤0.5% section synchronisation, ±0.2mm edge detection and ≤8 second roll change on a full φ1500mm roll. Foundation must carry 22 tons per square meter, supply is 3-phase 380V, compressed air ≥0.6mpa. FOB Ningbo China, delivery within 150 working days after deposit, warranty 1 year from receipt. The full specification, and the wider ci flexo printing machine china range behind it, sits on our CI flexo printing machine page.
