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On the prefabricated construction site, when the crane lifts several tons of concrete wall panels and places them precisely in place, few people notice the palm-sized metal boxes in the corners of the steel molds. These devices, called shuttering magnets, silently guard the molding accuracy of each shear wall. They are like invisible hands, firmly "holding" the mold, allowing the "skeleton" of the high-rise building to remain motionless in the torrent of concrete.

Shuttering Magnets

Core Challenge: "Pain of Mold" of Prefabricated Shear Walls

In traditional prefabricated shear wall production, fixed side molds often rely on welding or bolt mechanical fixation. This method is not only inefficient, but also has three major pain points:

1. Accuracy out of control: uneven manual tightening force causes mold displacement and wall thickness error exceeds the limit;

2. Damage to the mold: high welding temperature deforms the steel mold and the bolt holes permanently damage the flatness of the tabletop;

3. Efficiency bottleneck: The installation of a single wall panel mold takes up to 1-2 hours, which seriously slows down the production line rhythm.

The birth of Shuttering Magnets has completely reconstructed this process - magnetic adsorption replaces physical destruction, bringing about a qualitative change in the fixing method.

Magnetic black technology: How can a small magnetic box bear a huge force?

▶ Structural design: a precise system that can achieve great results with just a little effort

- Permanent magnetic core: using NdFeB N52 grade strong magnets, the adsorption force of a single box can reach 450-2100kg;

- Magnetic circuit control: original magnetic shielding steel shell structure, adjusting the magnetic circuit air gap through the switch button to achieve "adsorption/release" switching;

- Mechanical adaptation: double-sided high-strength fastening screws (8.8 grade) can be connected to various side molds such as angle steel and channel steel.

▶ Operational revolution: three steps to complete the fixation of hundreds of tons

1. Positioning: The magnetic box is placed in the preset position of the steel mold table;

2. Activation: Press the button, and the magnet instantly adsorbs the tabletop (adsorption force↑);

3. Clamping: Rotate the side screws to clamp the L-shaped angle steel side mold.

When disassembling, you only need to use a special crowbar to gently lift the button. The magnetic force is attenuated by 90% and can be removed with bare hands.

Cost items	Traditional fixing	Magnetic box solution
Mold loss	High welding deformation scrap rate	No contact and zero damage
Labor time	2 people/hour operation	1 person/5 minutes
Maintenance cost	Frequent bolt replacement	Lifespan over 10 years

In large precast concrete projects such as bridges and high-rise buildings, traditional formwork fixing methods (such as bolts and welding) often face problems such as low efficiency, high cost, and easy damage to the formwork. However, the 2100KG precast magnet, with its super strong magnetic attraction and innovative design, is becoming an indispensable "invisible anchor" in modern engineering.

Functional principle: perfect combination of magnetic force and mechanical design

The core of the 2100KG prefabricated magnet is composed of a neodymium iron boron (NdFeB) magnet, a steel shell and a magnetic control mechanism. Its unique design releases the magnetic force in a concentrated manner through the cooperation of the magnet and the steel shell, achieving a vertical holding force of up to 2100 kg. The unique "magnetic control box" structure is linked to the magnetic control rod through the magnet block. When operating, the steel template can be adsorbed by pressing the rod body, and the spring assists in rapid disassembly without mechanical damage or complex tools. This design not only simplifies the operation process, but also ensures the reuse rate of the template.

Core application scenarios in large projects

1. Bridge engineering: precise assembly of modular components

In bridge components such as prefabricated corrugated steel web composite box girders, magnets are used to fix steel formwork and concrete embedded parts. By embedding magnet sheets at the connection between the corrugated steel web and the concrete base plate, the temporary fixing effect of the prefabricated parts can be enhanced, and high-precision assembly can be achieved with prestressed steel bars. This technology avoids the thermal damage to steel caused by traditional welding and reduces the time for on-site adjustment.

2. High-rise buildings: efficient formwork system support

The pouring of concrete walls of high-rise buildings needs to withstand huge lateral pressure. 2100KG magnets can be combined with modular formwork systems to quickly fix steel formwork. Its feature of not requiring drilling is particularly suitable for complex curved surfaces or dense steel bar areas, avoiding the loss of formwork strength caused by drilling.

3. Prefabrication plant: a key tool for standardized production

In the prefabricated concrete component factory, magnets are used to fix the mold table to ensure the stability of the formwork during the pouring process. Compared with traditional screw fixation, magnets support "one-click adsorption" and "lever release", which can shorten the single operation time by 70% and extend the template life by 30%.

Technical advantages: triple improvement in efficiency, safety and economy

1. Efficiency revolution

- Fast installation and disassembly: Magnet fixation only requires pressing down the magnetic control rod, and separation is achieved through the lever principle during disassembly, which is more than 5 times faster than the traditional method.

- Reduced reliance on manual labor: No drilling or welding is required, and the operation can be completed by one person, especially suitable for operations at high altitude or in narrow spaces.

2. Quality assurance

- Zero damage to the formwork: Magnetic fixation has no mechanical contact, which avoids scratches or deformation on the formwork surface and improves the flatness of the concrete molding surface.

- High-precision positioning: The magnet can fine-tune the position, and the error is controlled at the millimeter level, which is suitable for fine construction such as prestressed tendon channels in bridges.

3. Cost optimization

- Reuse rate: The life of the magnet is more than 10 years, and the cost of a single use is only 1/5 of that of the traditional method.

- Reduced material waste: No need to consume consumables such as bolts and welding rods, reducing carbon emissions and resource consumption.

2100KG Precast Concrete Magnets

Safety and maintenance tips

Although magnets have significant advantages, their operation still requires attention:

- Safety protection: Wear anti-pressure gloves when operating large magnets to avoid strong magnetic pinching.

- Temperature control: The working environment must be below 80℃ to prevent magnetic attenuation.

- Regular maintenance: Remove concrete residues and apply anti-rust oil to ensure that the magnet surface is smooth and the suction is stable.