This is an upgraded three-dimensional mechanism built from the classic 180 degree V-fold open box structure. By adding crossed interior planes, the mechanism creates a more complex and more layered spatial effect when the card opens.
Compared with a standard V-fold open box, this version not only keeps the stable self-opening behavior of the base structure, but also creates four-direction support inside the box. That makes the visual center feel more focused, which is especially useful when you want to present a main subject such as a building, a character, or the central object in a scene.
If you already understand the basic V-fold or parallel open box structures, this crossed-plane version is a strong next step in your pop-up design practice.
Mechanism Category
Primary Category: 180 Degree Structure
Core Mechanism: V-Fold / Open Box Structure / Crossed Interior Planes / Cross Support Structure / Advanced Structure
Structural Traits: Adds two crossed planes inside a V-fold open box so the opened form gains a stronger center, richer layering, and four-direction spatial extension
Typical Uses: Building subjects / Character displays / Scene centerpieces / Pop-up layouts that need multi-direction support
Let's make one together. Here are the detailed steps:
Step-by-Step Guide
Step 1: Download the template and prepare the materials
First, download the printable template for this mechanism and prepare the following basic tools and materials:
- 250g cardstock is recommended for better stability, though 200-300g also works
- Scissors or a craft knife
- A metal ruler for cutting and scoring support
- Glue or double-sided tape
- A scoring tool, or an empty ballpoint pen
After printing the template, you will see several important line types:
- Solid lines: for cutting
- Dashed lines: for scoring and folding
- Center symmetry line / reference line: for structural alignment
Compared with a standard V-fold, this version adds crossed interior planes. Study how the faces connect before you start cutting and folding.
Step 2: Cut the template and score the fold lines
Use scissors or a craft knife to cut along every solid line and keep the edges clean.
Next, score along every dashed line:
- Align the fold lines with a ruler
- Press the fold line lightly with a scoring tool instead of folding hard immediately
Why does scoring matter so much? Because this crossed structure contains multiple overlapping folded surfaces. Without scoring in advance:
- The folds can slip out of alignment
- The center crossed area can bulge or deform
- Opening and closing will feel less smooth
Helpful tips:
- Score every fold line lightly first, then fold everything in sequence
- Be especially precise with the fold lines around the center crossed area
Step 3: Assemble the crossed-plane V-fold structure
This is the most important stage of the whole mechanism.
1. Build the basic V-fold open box first
- Fold the left and right sides inward according to the template
- Form the basic V-fold driving structure
- At this stage, opening the card should already start to push the box outward
2. Assemble the crossed interior planes
- Find the two crossed plane pieces in the middle of the template
- They usually form a perpendicular cross shape
- Insert or glue them in order so both planes meet at the center
Key points:
- The two crossed planes must align at the center
- Their folding directions must match, or they will interfere with each other
- Do not glue everything permanently at the start; test the opening motion first
3. Test the movement and lock the structure in place
- Open the card slowly to 180 degrees
- Check whether the structure opens fully
- Check whether the overall form stays symmetrical
- Check whether the center remains stable
After everything moves correctly, fix the remaining glue points.
When finished, you will have an open box mechanism that expands automatically, creates a crossed spatial core inside, and delivers much stronger depth than a standard V-fold. It is more complex than the ordinary version, but it also creates a stronger visual impact and can carry content that extends in four directions.
Step 1 includes one English-specific visual. The second Step 1 image, plus the Step 2 and Step 3 visuals, currently reuse the Chinese version because separate English images were not provided.
The PDF files below are available in both Chinese and English. Choose the version you need.
PDF Downloads
Chinese Version
English Version
- 180 Degree V-Fold Open Box Mechanism with Crossed Planes PDF - Part 1
- 180 Degree V-Fold Open Box Mechanism with Crossed Planes PDF - Part 2
Next Article
180 Degree V-Fold Cube Pop-Up Mechanism Guide
Link coming soon.