It is a mobile, hand-operated machine used at construction sites to bend and shape large sheets of metal into a specific corrugated profile called "Jiaochi" (which means "hidden fastener" or "locked seam"). The 820mm effective width is the maximum width of the metal sheet it can process into the final panel.

Detailed Breakdown

1. Portable

• Meaning: The machine is designed to be lightweight and movable. It does not require a fixed foundation or large, permanent installation.

  
  

• Use Case: It can be easily carried and set up directly on a construction site, on a roof, or in a workshop. This eliminates the need to pre-form panels off-site and transport them, saving time and reducing the risk of damaging long, pre-formed sheets.

2. Jiaochi

• Meaning: This is a Chinese term that has become a standard name for a specific type of roof panel profile. "Jiao" means angle/corner, and "Chi" means to loosen/gallop, but in this context, it refers to a concealed-fastener locking system.

• Key Feature: Jiaochi panels are designed to snap or lock together without exposed screws on the surface of the panel. This creates a cleaner look, better weather resistance, and higher structural integrity. The machine forms the male and female edges that interlock with adjacent panels.

3. Tile Pressing Machine

• Meaning: This is a roll-forming machine. It doesn't "press" like a stamp but rather incrementally bends a flat metal coil or sheet as it passes through a series of hardened steel rollers.

  
  

• Process: Each set of rollers bends the metal a little more than the previous set until the complete Jiaochi profile is achieved.

4. 820mm Effective Width

This is the most critical specification.

• Meaning: It indicates the maximum width of the flat metal sheet that the machine is designed to form into the finished panel.

  
  

• Calculation: The effective width is always greater than the width of the final formed panel. This is because the metal is bent and corrugated, which consumes some of the flat material's width to create the ridges and valleys of the profile.

  
  

• Example: An 820mm wide flat sheet might produce a finished Jiaochi panel that is, for instance, 780mm wide (the coverage width) after all the bends are formed. The 820mm measurement is what you need to know when ordering your raw metal coils or sheets.

Typical Specifications for this Model:

• Forming Speed: ~8-10 meters per minute (hand-cranked).

• Material Thickness: Usually designed for thin steel or aluminum coils, commonly between 0.3mm to 0.8mm.

• Shaft Diameter: Often around 60mm or more, made of solid steel for durability.

• Weight: Approximately 80-150 kg, making it manageable for 2-3 people to carry.

Advantages:

• On-Site Production: Create panels of any required length on demand.

• Cost-Effective: Lower initial investment compared to large electric-powered roll formers.

• No Power Needed: Ideal for remote sites without electricity.

• Efficiency: Reduces material waste and handling damage.

Conclusion

A Portable Jiaochi Tile Pressing Machine with an 820mm Effective Width is a versatile, manual tool for fabricating high-quality, concealed-fastener metal roof panels directly on a job site from flat metal sheets that are up to 820mm wide. It is a key piece of equipment for modern steel structure construction, especially for roofing and cladding projects.