Offset Carry Bag Printing Machine

About Offset Carry Bag Printing Machine

Here's a detailed breakdown of specifications you'd typically find for a double color non-woven bag printing machine, drawing from examples available in the Indian market (like Decent Print Lines in Faridabad):

I. Core Specifications:

1. Number of Colors: 2 (Prints two distinct colors in one pass).

2. Printing Technology: Primarily Sheet-fed Offset. Some flexographic models are also available for specific applications. Many machines are "2-in-1" or "3-in-1," meaning they can print on non-woven bags, paper, and sometimes plastics.

3. Maximum and Minimum Bag/Sheet Size (Common Ranges):

   • Max Bag/Sheet Size:

     • Typically ranges from 406 x 560 mm (16" x 22") to 457 x 620 mm (18" x 24.5"). Some models may go slightly larger or smaller.

   • Max Printing Area:

     • Usually slightly smaller than the max sheet size, e.g., 375 x 550 mm to 440 x 605 mm.

   • Min Bag/Sheet Size:

     • Commonly around 125 x 180 mm or 180 x 260 mm.

4. Material Thickness Compatibility (GSM - grams per square meter):

   • Non-woven Bag Thickness: Typically 42 GSM to 150 GSM. Some robust machines might handle up to 300 GSM.

   • Paper Thickness (if dual-purpose): 30 GSM to 250 GSM, and in some cases, up to 300 GSM.

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

   • For Non-Woven Bags: 2000-3000 IPH (Impressions Per Hour) or around 40-120 pcs/min (Pieces Per Minute), depending on the automation level and specific machine design.

   • For Paper (if dual-purpose): Significantly higher, often 2000-8000 IPH.

6. Plate and Blanket Sizes:

   • Plate Size: Specific dimensions matching the printing area, e.g., 420 x 560 mm or 480 x 620 mm. Plate thickness is usually around 0.15mm to 0.28mm.

   • Blanket Size: Corresponding dimensions for the offset blanket, e.g., 460 x 560 x 1.9 mm or 515 x 620 x 1.9 mm.

II. Mechanical & System Specifications:

1. Ink Roller System:

   • Typically features 14 ink rollers per unit (for each color), with 3 form inking rollers for effective ink distribution and consistent print quality.

   • Some models might have 10 ink rollers with 2 form rollers per unit.

2. Water Roller System (Dampening):

   • Usually 5 water rollers per unit (for each color), with 2 form rollers to maintain the non-image area of the plate.

   • Dampening method: Often Mollention or similar.

3. Feeder System:

   • Automatic Feeder: Most modern double color machines come with an automatic feeding system, often a multi-sucker universal feeder or vacuum front feeder, for efficient and continuous material input.

   • Front Loading System: Simplifies material loading.

4. Delivery System:

   • Chain Delivery System with Receding Stacker: Ensures neatly collected printed bags or sheets.

   • Jogger System: Helps to collect and align bags/papers on delivery.

5. Cylinders:

   • Hard Chromium Faced Cylinders: For durability and precise printing.

   • Often involves two plate cylinders and a common blanket cylinder for transferring both colors to the bag.

6. Gears:

   • Hard & Ground Gears / Helical Gears: For smooth operation, accuracy, and longevity.

III. Electrical & Operational Specifications:

1. Power Requirements:

   • Voltage: Commonly 220V/50Hz (single phase) or 380V (three phase), depending on the machine's overall power consumption and specific model.

   • Power Consumption: Ranges from 1.1 kW to 3 kW (or 1.5 HP to 4 HP) for the main motor. Overall power might be higher if including drying systems and other features (e.g., 2.5 kW to 17 kW total power).

2. Automation Grade:

   • Most double color non-woven bag printing machines are Automatic or Semi-Automatic, offering features like automatic feeding, printing registration, and drying.

3. Control System:

   • Touch Screen Control Panel: For user-friendly operation, setting parameters, and monitoring.

   • Frequency Speed Control: For adjustable printing speed.

   • Computerized: Modern machines often have computerized controls for precision.

IV. Advanced Features & Benefits:

• Perfect Registration: Crucial for accurate alignment of the two colors, ensuring high-quality prints. Achieved through features like pull-type side lay with micro adjustment and pneumatic impression.

• Pneumatic Impression with Compressor: Uses air pressure for consistent and sharp impressions.

• Automatic Ink Feed System / Automatic Ink Cleaning Device: Reduces manual effort and maintenance.

• Centralized Oil Lubrication System: Ensures smooth operation and prolongs machine life.

• Pre-set Copy Counter: For production tracking and managing print runs.

• Double Sheet Detector: Prevents machine damage and material waste.

• Anti-static System/Charger: To remove static electricity from non-woven bags, which can cause feeding and printing issues.

• Exhaust Fan for Quick Drying: Especially important for faster production speeds.

• Single Lever Operation: Simplifies the control of inking, dampening, and impression.

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

• Resistance to Moisture and Rust: Durable construction with features like hard chromium faced cylinders.

• Compact Design: Optimized for space efficiency.

• Ability to print on both sides in a single pass (for some models like "Two-Side" or "Satellite" models): This is a significant advantage, reducing production time.

V. Physical Specifications:

• Machine Dimensions (L x W x H): Varies greatly by model, e.g., 1760 x 935 x 1340 mm up to 3500 x 1200 x 1500 mm.

• Weight: Can range from 700 kg to 1500 kg or more, depending on the machine's size and features.