1. Pre-Production: Material Selection & Preparation

• Cutting base materials (greyboard/paperboard) into standard sheets via a paper cutting machine(precision ±0.1mm) to ensure uniform size for subsequent processing.

2. Box Body Processing: Cutting, Creasing & Laminating

Step 2.1: Laminating (Surface Decoration)

• Purpose: Bond surface decorative paper (e.g., art paper) to the greyboard base to improve aesthetics and durability.
• Process:
  1. Apply adhesive (white glue or laminating glue) evenly on the greyboard surface using a roller coater.
  2. Press the decorative paper onto the greyboard via a laminating machine (temperature: 60-80°C, pressure: 0.3-0.5MPa) to eliminate air bubbles and ensure tight bonding.
  3. Dry the laminated board in a drying tunnel (10-15 minutes) to cure the adhesive and prevent warping.

Step 2.2: Die-Cutting & Creasing (Structural Shaping)

• Purpose: Cut the laminated board into the net shape of the box (flat, foldable template) and create precise creases for folding. This is the most critical step for foldability.
• Process:
  1. Design the box net (including base, side panels, lid, and magnetic slot positions) using CAD software.
  2. Make a die-cutting mold (steel rule mold) based on the CAD design—steel rules (sharp for cutting) and creasing rules (rounded for folding) are embedded in a wooden or plastic base.
  3. Load the laminated board into a flatbed die-cutting machine (or rotary die-cutting machine for high-volume production). The machine applies pressure (1.5-2MPa) to:
     • Cut through excess material (e.g., edges of the box net) via steel rules.
     • Create indentations (creases) on fold lines via creasing rules—these creases allow the board to fold neatly along fixed lines (no cracking or deformation).
  4. Remove waste material (called "stripping") manually or via an automatic stripping machine to get the flat box net.

3. Magnetic Component Installation

Step 3.1: Slot Drilling for Magnets

• Purpose: Create small, recessed slots on the box net (usually on the lid flap and base edge) to embed magnets (no protrusion).
• Process:
  1. Mark magnet slot positions on the die-cut box net (aligned with CAD design) using a laser positioning device (precision ±0.05mm).
  2. Use a CNC router or punching machine to drill slots—slot size matches magnet dimensions (e.g., 4mm diameter slot for a 4mm magnet, depth = magnet thickness to keep it flush).

Step 3.2: Magnet Bonding

• Process:
  1. Apply a small amount of hot-melt glue or epoxy resin into the drilled slot (using a glue dispenser for even application).
  2. Place the magnet into the slot (ensuring correct polarity—lid and base magnets must attract each other; usually marked with "N/S" during magnet preparation).
  3. Press the magnet gently via a press machine (low pressure: 0.1-0.2MPa) to ensure full contact with the adhesive.
  4. Cure the glue in a drying area (10-20 minutes for hot-melt glue, 24 hours for epoxy resin) to fix the magnet in place.

4. Folding & Forming

ব্লগের বিস্তারিত

বাড়ি ব্লগ

Foldable Magnetic Boxes Manufacturing Process ！

Foldable Magnetic Boxes Manufacturing Process ！

2025-09-19

The manufacturing process of foldable magnetic boxes is a systematic workflow that integrates material selection, precision processing, structural forming, and magnetic assembly, ensuring the final product is both foldable (for space-saving storage/transport) and magnetic (for secure closure). Below is a detailed breakdown of the core steps, from raw material preparation to finished product inspection:

 

1. Pre-Production: Material Selection & Preparation

 

Foldable magnetic boxes rely on two key material systems: box body materials (for structure and aesthetics) and magnetic components (for closure). This stage ensures materials meet functional and design requirements.

 

Material Type	Common Options	Selection Criteria
Box Body (Base)	Greyboard (1.5-3mm thick, for rigidity), kraft paperboard (for eco-style)	- Rigidity: Supports folding without deformation.   - Thickness: Matches box size (larger boxes need thicker greyboard).
Box Body (Surface)	Art paper, coated paper, textured paper, leatherette, or fabric	- Aesthetics: Matches brand design (e.g., matte coated paper for luxury).   - Durability: Resists scratches (for retail use).
Magnetic Components	Neodymium magnets (small, strong; 3-8mm diameter), ferrite magnets (low-cost)	- Magnetic force: Strong enough to close the box (neodymium preferred for small boxes).   - Size: Fits hidden slots (avoid protruding).
Adhesives	White glue (for paper bonding), hot-melt glue (for magnets, fast-drying)	- Bonding strength: Prevents delamination or magnet falling off.   - Safety: Non-toxic (for food/cosmetic packaging).

 

Key Preparation Step:

 

• Cutting base materials (greyboard/paperboard) into standard sheets via a paper cutting machine(precision ±0.1mm) to ensure uniform size for subsequent processing.

 

2. Box Body Processing: Cutting, Creasing & Laminating

 

This stage shapes the box body into a foldable structure and enhances its appearance. The core goal is to create clear "fold lines" (creases) and a smooth surface.

 

Step 2.1: Laminating (Surface Decoration)

 

• Purpose: Bond surface decorative paper (e.g., art paper) to the greyboard base to improve aesthetics and durability.
• Process:
  1. Apply adhesive (white glue or laminating glue) evenly on the greyboard surface using a roller coater.
  2. Press the decorative paper onto the greyboard via a laminating machine (temperature: 60-80°C, pressure: 0.3-0.5MPa) to eliminate air bubbles and ensure tight bonding.
  3. Dry the laminated board in a drying tunnel (10-15 minutes) to cure the adhesive and prevent warping.

 

Step 2.2: Die-Cutting & Creasing (Structural Shaping)

 

• Purpose: Cut the laminated board into the net shape of the box (flat, foldable template) and create precise creases for folding. This is the most critical step for foldability.
• Process:
  1. Design the box net (including base, side panels, lid, and magnetic slot positions) using CAD software.
  2. Make a die-cutting mold (steel rule mold) based on the CAD design—steel rules (sharp for cutting) and creasing rules (rounded for folding) are embedded in a wooden or plastic base.
  3. Load the laminated board into a flatbed die-cutting machine (or rotary die-cutting machine for high-volume production). The machine applies pressure (1.5-2MPa) to:
     • Cut through excess material (e.g., edges of the box net) via steel rules.
     • Create indentations (creases) on fold lines via creasing rules—these creases allow the board to fold neatly along fixed lines (no cracking or deformation).
  4. Remove waste material (called "stripping") manually or via an automatic stripping machine to get the flat box net.

 

3. Magnetic Component Installation

 

Magnets are installed in hidden slots (to avoid visibility) on the box’s lid and base, ensuring the box closes securely. Precision is critical here—misaligned magnets will cause poor closure.

 

Step 3.1: Slot Drilling for Magnets

 

• Purpose: Create small, recessed slots on the box net (usually on the lid flap and base edge) to embed magnets (no protrusion).
• Process:
  1. Mark magnet slot positions on the die-cut box net (aligned with CAD design) using a laser positioning device (precision ±0.05mm).
  2. Use a CNC router or punching machine to drill slots—slot size matches magnet dimensions (e.g., 4mm diameter slot for a 4mm magnet, depth = magnet thickness to keep it flush).

 

Step 3.2: Magnet Bonding

 

• Process:
  1. Apply a small amount of hot-melt glue or epoxy resin into the drilled slot (using a glue dispenser for even application).
  2. Place the magnet into the slot (ensuring correct polarity—lid and base magnets must attract each other; usually marked with "N/S" during magnet preparation).
  3. Press the magnet gently via a press machine (low pressure: 0.1-0.2MPa) to ensure full contact with the adhesive.
  4. Cure the glue in a drying area (10-20 minutes for hot-melt glue, 24 hours for epoxy resin) to fix the magnet in place.

 

4. Folding & Forming

 

This stage transforms the flat box net into a 3D foldable structure by folding along pre-made creases and bonding key joints.

 

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