Multi Color Offset Printing Machine With UV Dryer

A multi-color non-woven bag printing machine is designed to print designs with three, four, or even more colors onto pre-made non-woven bags. These machines are essential for businesses that require complex, visually appealing, and branded bags for various purposes like shopping, promotion, and packaging. While flexographic and screen printing can offer multi-color options, offset printing technology is very common for multi-color non-woven bag printing, especially when high quality and detail are paramount.

Given your location in Faridabad, Haryana, India, it's worth noting that several reputable manufacturers and suppliers in this region specialize in these machines, including Decent Print Lines, Sahil Graphics, Prakash Machineries Private Limited, Ecomack India Co., Fair Deal Engineers, and Romco Offset Private Limited.

Here's a detailed specification breakdown for a typical multi-color non-woven bag printing machine:

I. Core Specifications:

1. Number of Colors: 3, 4, or even 5/6 colors. This indicates how many separate colors can be printed in a single pass, allowing for intricate designs, gradients, and full-color images.

2. Printing Technology:

   • Sheet-fed Offset Printing: This is the most common for high-quality multi-color non-woven bag printing. It offers excellent registration and sharp image reproduction. Many machines are "2-in-1" or "3-in-1" models, capable of printing on non-woven bags as well as paper and other sheet materials.

   • Flexographic (Flexo) Printing: Used for high-volume, continuous printing. While less common for detailed multi-color graphics on pre-made bags, it's widely used for roll-to-roll non-woven fabric printing which is then converted into bags.

   • Screen Printing: Less common for fully automatic multi-color bag-to-bag printing due to slower speeds, but can be used for vibrant, thick ink deposits and special effects on smaller runs.

3. Maximum and Minimum Bag/Sheet Size:

   • Max Bag/Sheet Size: Typically ranges from 406 x 560 mm (16" x 22") up to 457 x 620 mm (18" x 24.5") or even larger for industrial models (e.g., 20"x30" or 24"x36").

   • Max Printing Area: Slightly smaller than the max sheet size, to allow for gripper margins (e.g., 375 x 550 mm for a 16"x22" machine, or 440 x 605 mm for an 18"x24.5" machine).

   • Min Bag/Sheet Size: Usually around 125 x 180 mm or 180 x 260 mm.

4. Material Thickness Compatibility (GSM):

   • Non-woven Bag Thickness: Generally compatible with non-woven fabric ranging from 42 GSM to 150 GSM. Some heavy-duty models might go up to 300 GSM.

   • Paper Thickness (if dual-purpose): 30 GSM to 250 GSM, often up to 300 GSM, allowing for versatility in production.

5. Printing Speed (Impressions Per Hour - IPH or Pieces Per Minute - PPM):

   • For Non-Woven Bags: 2000-3000 IPH is a common range for automatic multi-color offset machines. Some sources state production capacities up to 6000-7000 bags/hour for heavy-duty semi-automatic models.

   • For Paper (if dual-purpose): Typically much higher, ranging from 2000 to 8000 IPH.

6. Plate and Blanket Sizes:

   • Plate Size: Specific to the machine model, e.g., 420 x 560 mm or 480 x 620 mm. Plate thickness is usually between 0.15mm and 0.28mm.

   • Blanket Size: Corresponding dimensions for the offset blanket, e.g., 460 x 560 x 1.9 mm or 505 x 620 x 1.9 mm.

II. Mechanical & System Specifications:

1. Ink Roller System:

   • Each color unit will have its own set of ink rollers. For a multi-color machine, this typically means:

     • Total Ink Rollers: 14-16 ink rollers per unit (e.g., 14 ink rollers per color for a 4-color machine means 56 ink rollers in total).

     • Form Inking Rollers: 3-4 form rollers per unit (these directly apply ink to the plate). This ensures uniform ink coverage and quality.

2. Water Roller System (Dampening):

   • Each color unit will also have a water dampening system to keep the non-image areas of the plate clean.

   • Typically features 5 water rollers per unit, with 2 form dampening rollers.

   • Dampening Method: Often a conventional dampening system.

3. Feeder System:

   • Automatic Feeder: Essential for multi-color machines to maintain high production speeds. This is usually a powerful suction-based feeder (e.g., multi-sucker universal feeder, vacuum front feeder).

   • Adjustable Feeder Nuzzles: For handling different types and textures of non-woven bags and paper.

   • Anti-static Function: Important for non-woven materials, often applied at the feeder or delivery section to prevent static-related feeding and stacking issues.

4. Delivery System:

   • Chain Delivery System with Receding Stacker: For neatly collecting printed bags and sheets.

   • Jogger System: To align the delivered bags/sheets perfectly.

5. Cylinders:

   • Hard Chromium Faced Cylinders: For durability, precision, and resistance to wear and tear.

   • In a multi-color offset setup, each color unit will have its own plate cylinder, and there might be common impression cylinders or a satellite configuration (where color units are arranged around a large central impression cylinder).

6. Gears:

   • Hard & Ground Gears / Helical Gears: Provide smooth, quiet, and precise operation, reducing backlash and ensuring long machine life.

III. Electrical & Operational Specifications:

1. Power Requirements:

   • Voltage: Typically 3-phase power, e.g., 380V/50Hz or 440V/50Hz.

   • Total Power Consumption (kW or HP): Significantly higher than single or double-color machines due to more printing units and automation. Can range from 4 kW to 18 kW or more (e.g., 5 HP to 25 HP).

2. Automation Grade:

   • Most multi-color non-woven bag printing machines are Automatic. This includes:

     • Automatic feeding and delivery.

     • Automatic printing registration (often with micro-adjustment capabilities for precise color alignment).

     • Automatic ink control and cleaning.

     • Automatic dampening.

3. Control System:

   • LCD Type Touch Screen Panel: For intuitive control, setting parameters, diagnosing issues, and monitoring production.

   • Frequency Speed Control: Allows for precise adjustment of printing speed.

   • Computerized Controls (PLC-based): For advanced automation and error management.

IV. Advanced Features & Benefits:

• High Precision Registration: Critical for multi-color printing to prevent misregistration. Achieved through features like pull-type side lay with fine micro-adjustment, swinging-downward front lay, and advanced sensor systems.

• Pneumatic On/Off Inking, Dampening & Impression: Uses air pressure for precise control and consistent quality. Requires an air compressor (often silent models are included).

• Automatic Ink Cleaning Device: Simplifies and speeds up color changes and maintenance.

• Centralized Oil Lubrication System: Automatically lubricates moving parts, reducing wear and extending machine life.

• Pre-set Copy Counter: For accurate production tracking and batch control.

• Double Sheet Detector: Prevents two sheets from entering the printing unit simultaneously, avoiding jams and damage.

• Exhaust Fan/Drying System: For quick drying of printed bags, especially with multiple ink layers, preventing smudging and allowing for faster subsequent processing.

• Single Lever Control: Simplifies the operation of key functions (inking, dampening, impression).

• Short Changeover Time: Designed for quick setup between different bag sizes and print jobs.

• Versatility (Bag-to-Bag and Sheet-to-Sheet): Many models can efficiently print on both pre-made non-woven bags (D-cut, U-cut, semi-box, handle bags) and non-woven fabric sheets (which can then be converted). They can also print on various paper types.

• Helical Gears: Provide smooth and silent operation, ensuring long-term precision.

• Anti-Static Charger: To neutralize static electricity on non-woven materials, ensuring smooth feeding and delivery.

• Satellite Model (Specific Configuration): In some multi-color machines, printing units are arranged around a large central impression cylinder, which can offer excellent registration.

When investing in a multi-color non-woven bag printing machine, it's crucial to assess your current and future production needs, the complexity of designs, desired print quality, and available factory space. Visiting a manufacturer in Faridabad (like those mentioned above) would allow you to see machines in operation and get precise specifications tailored to your requirements.