Technology
Cardboard Box Manufacturing Process: From Paper to Finished Box
Step-by-step explanation of how cardboard boxes are manufactured, from raw paper rolls through corrugating to finished packaging products.
Understanding the cardboard box manufacturing process helps buyers make better equipment and material decisions. This guide explains each production stage.
Overview of Manufacturing Stages
Stage 1: Paper preparation
Stage 2: Corrugating (board making)
Stage 3: Converting (box making)
Stage 4: Finishing and shipping
Stage 1: Paper Preparation
Raw Materials
Kraft linerboard: Brown outer layers (125-440 gsm)
Test linerboard: Recycled outer layers (cheaper)
Corrugating medium: Forms the flutes (90-200 gsm)
Adhesive: Starch-based glue bonds layers
Paper Storage
Climate-controlled warehouse
Proper humidity (50-65% RH)
Acclimation before use (24-48 hours)
Stage 2: Corrugating Process
The corrugating line converts paper rolls to board sheets
Step 2.1: Single Facer
Paper feeds from roll stand
Preheater conditions paper
Corrugating rolls form flutes
Adhesive applied to flute tips
Liner bonds to one side
Output: Single-face web
Step 2.2: Bridge/Incline
Single-face travels up conveyor
Provides buffer storage
Web stabilizes (moisture equilibrium)
Step 2.3: Glue Machine
Adhesive applied to exposed flute tips
Precise metering for bond quality
Step 2.4: Double Backer
Second liner fed from roll stand
Hot plates cure adhesive
Creates finished corrugated board
Step 2.5: Slitter Scorer
Cuts board to required widths
Creates fold lines (scores)
Step 2.6: Cut-Off
Cuts board to sheet length
Synchronized with orders
Step 2.7: Stacker
Collects and stacks sheets
Counts and bundles
Stage 3: Converting Process
Converting turns board sheets into boxes
Option A: Flexo Folder Gluer (FFG)
All-in-one production
Prints graphics (1-4 colors)
Cuts slots for flaps
Scores fold lines
Folds box shape
Glues manufacturer's joint
Output: Flat, folded boxes
Option B: Separate Operations
Printer Slotter → Folder Gluer or Stitcher
Option C: Die Cutting
For complex shapes: Die Cutter → Folder Gluer
Stage 4: Finishing
Quality inspection
Bundling and strapping
Palletizing
Stretch wrapping
Shipping to customer
Boiler-Free Manufacturing
Xuegong's technology changes Stage 2
No steam boiler needed
Room temperature operation
Instant-setting adhesive
Same speed, 60% less energy
Contact Xuegong for manufacturing equipment and adhesive solutions.
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