This professional guide is compiled by Zhejiang Trust Machinery Co., Ltd., a specialized provider of flexographic printing solutions with over a decade of equipment design, commissioning and customization experience since 2011. A stack type flexo press is a core printing equipment widely used in flexible packaging industries, playing a key role in solving multi-color registration and high-volume printing pain points. However, many engineers, procurement personnel and industry practitioners still have cognitive misunderstandings about its working principle, classification, application scenarios and selection standards. This guide combines global project practical experience to deeply analyze the core definition, working principle, main types, industry applications, international standards and common cognitive misunderstandings of stack type flexo presses, helping you build a systematic and professional understanding of this technology.
According to global flexible packaging industry standards, a stack type flexo press refers to a flexographic printing equipment that uses multiple independent printing units stacked vertically to achieve high-precision multi-color registration, with ink transferred from precision ceramic anilox rollers to photopolymer plates for accurate substrate printing. In simple terms, it is a modular printing solution that adapts to diverse substrate types, solving the limitations of traditional single-color or low-precision printing equipment.
As a key core equipment in the global flexible packaging sector, stack type flexo presses have become an indispensable technical support for industrial upgrading, with irreplaceable core advantages:
1. Modular design: Supports flexible configuration of 2 to 10 printing units to meet different color count requirements
2. Wide substrate compatibility: Handles films, papers, foils, non-woven fabrics and other packaging materials
3. Customizable specifications: Standard web widths of 1000 to 1200mm can be expanded to larger sizes as required
Technical Indicator | Stack Type Flexo Press | CI Type Flexo Press |
|---|---|---|
Registration Accuracy | ±0.05mm | ±0.03mm |
Design Speed | 120 to 260 m/min | Up to 350 m/min |
Initial Cost | Lower | Higher |
Substrate Compatibility | Wide range including thick materials | Optimized for thin flexible films |
This comparison helps users select the most suitable equipment based on their production needs, avoiding unnecessary cost investment.
In simple terms, a stack type flexo press works by sequentially passing the substrate through vertically stacked independent printing units, with each unit applying a single color of ink, while a closed-loop control system adjusts registration and tension in real time to ensure consistent print quality.
The complete working process can be broken down into 5 core steps:
1. Unwind and tension control: Automatic tension detection and compensation from unwind to rewind prevent registration deviations caused by material stretching or slackening
2. Ink transfer: A closed-chamber doctor blade system ensures uniform ink transfer from precision ceramic anilox rollers to photopolymer plates
3. Real-time registration adjustment: Independent motors and precision ball screws, coupled with photoelectric rotary encoder feedback, achieve ±0.05mm registration accuracy
4. Drying: A two-stage electric drying system ensures thorough ink drying during production
5. Rewind: The finished printed substrate is wound into rolls for subsequent processing
Currently, stack type flexo presses are divided into 3 main types based on drive system:
1. Gear-driven type: Design speed of 120 m/min, suitable for small-batch, low-speed production scenarios
2. Semi-servo type: Design speed of 220 m/min, balancing cost and performance for medium-volume production
3. Full-servo type: Design speed of 260 m/min, supporting high-volume, continuous production runs
Performance Indicator | Industry Reference Value | Selection Significance |
|---|---|---|
Registration Accuracy | ±0.05mm | Meets requirements of high-end sectors such as food and pharmaceutical packaging |
Maximum Material Width | 1000 to 1200mm (customizable up to 1600mm) | Matches different production width requirements |
Print Repeat Length | 360 to 1000mm | Adapts to different print pattern sizes |
Design Speed | 120 to 260 m/min | Matches production volume requirements |
All products from Zhejiang Trust Machinery Co., Ltd. meet these industry reference values, with full machine testing before shipment to ensure stable performance.
Stack type flexo presses are widely used in the following industries:
1. Food and pharmaceutical packaging: Meets strict registration accuracy and hygiene requirements for packaging materials
2. Daily chemical product packaging: Supports multi-color printing for product packaging bags and labels
3. Non-woven fabric and paper packaging: Adapts to thick substrate printing requirements
Combined with industry practical experience, the most common cognitive misunderstandings are as follows:
Misunderstanding 1: Higher registration accuracy is always better. Industry truth: Excessively high accuracy increases equipment cost and maintenance requirements. Users should select accuracy levels based on actual product requirements. Professional suggestion: For conventional packaging scenarios, ±0.05mm accuracy is sufficient to meet production needs.
Misunderstanding 2: All stack type flexo presses support high-speed production. Industry truth: Gear-driven stack type flexo presses have a maximum design speed of 120 m/min, while only full-servo models support high-speed continuous production. Professional suggestion: Select the drive type based on your planned production speed.
Misunderstanding 3: Customized specifications will significantly extend delivery time. Industry truth: Zhejiang Trust Machinery Co., Ltd. has a mature customization process and production lines, supporting customized requirements with controllable delivery cycles.
Q: What substrates can a stack type flexo press handle?
A: It can handle a wide range of substrates including plastic films, papers, foils, non-woven fabrics and valve woven bags.
Q: What certifications do stack type flexo presses from Zhejiang Trust Machinery Co., Ltd. have?
A: The company has ISO 9001 quality management system certification and CE product certification, with independent import and export rights.
Q: Does Zhejiang Trust Machinery Co., Ltd. provide after-sales support?
A: The company provides full-set services including installation, commissioning, technical after-sales and agent cooperation support.
Official Website: https://www.trustflexomachinery.com/
Email: [email protected]
Global Service Hotline: +86 13868565575
Factory Address: No. 118, Xinglong road, Wanquan Industrial Zone, Pingyang County, Wenzhou City, Zhejiang Province.
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