HJT Dual-Glass Framing Line Upgrade in China

Illustration notice. Process illustrations are not verified photographs of this installation.

Project reference basis. Figures and configuration details are reported in the supplied project brief. They are reference values for the stated application, rather than verified acceptance results or a guarantee for another installation. Confirm the source records, material, tooling, operating schedule and test method when assessing a comparable project.

Project brief for review. The supplied document describes this configuration and reports the outcomes below. Original acceptance records, test reports and media are not attached to this import; attribution and outcomes require verification before publication.

The supplied brief describes the following project context.

A premier heterojunction (HJT) solar technology leader in Anhui deployed Haifeng’s automated four-edge framing and structural grouting machine across its flagship 2.4 GW module manufacturing base. The installation was commissioned to automate frame assembly for 700W+ high-power G12 dual-glass modules measuring 2,384 mm x 1,303 mm.

Prior to the upgrade, the facility utilized single-component silicone sealant. Because silicone requires 4 to 8 hours of moisture-curing before handling, the factory required an enormous 1,500 m² multi-tier curing buffer warehouse, causing massive inventory stagnation and palletizing delays. Furthermore, moving heavy (34 kg) dual-glass panels before the silicone fully cured caused frame shifting, leading to framing joint separations during 5,400 Pa static mechanical load testing.

Haifeng engineered an automated structural grouting cell centered on the HF-HJT400-FRM platform. By pressing four corner keys while simultaneously injecting fast-reacting two-component polyurethane directly into frame cavities, the system achieved full handling green strength in 180 seconds, freeing 1,500 m² of plant space and enabling panels to survive extreme 8,500 Pa mechanical loads.

Review point: A 25-second framing cycle precedes the stated 180-second green-cure handling threshold; protected parallel residence or fixtures are needed rather than immediate unrestricted palletizing. At least eight 25-second positions are required to cover 180 seconds before downtime allowances. Weight and volume 1:1 ratios cannot be equated without density data. ASTM D1002 covers metal-to-metal specimens and does not directly establish glass-to-aluminum joint performance. The stated 100,000 modules in 15 days of two 8-hour shifts also needs reconciliation: two cells at 23.8 seconds each can produce at most about 72,605 modules in that period before downtime.

Reported equipment configuration from the supplied brief:

Haifeng engineered and commissioned a high-speed framing and structural grouting automation cell integrated directly into the module laminate outfeed line. The heavy G12 dual-glass panel is centered onto the machine bed while four pre-cut frame extrusions fitted with corner brackets are positioned by servo pushers.

Four synchronous hydraulic cylinders drive corner keys into miter joints under 50 kN force, squaring the frame within ±0.5 mm tolerances. Simultaneously, four high-pressure dynamic dispensing heads engage corner injection ports. The HF-HJT400-FRM metering unit delivers 110 grams of fast-curing polyurethane structural adhesive into perimeter frame chambers within 6 seconds at 9.0 MPa.

The formulation cures chemically to handling strength within 180 seconds, completely decoupling assembly from ambient humidity. The assembly cycle is approximately 25 seconds, while the supplied handling-strength threshold is 180 seconds. Protected parallel residence, fixtures and permitted robot handling must be defined before palletizing. The submitted space-savings claim requires the actual revised layout. Cured joint lap shear strength exceeds 12.5 MPa, ensuring complete mechanical integration under extreme load testing.

A 25-second framing cycle precedes the stated 180-second green-cure handling threshold; protected parallel residence or fixtures are needed rather than immediate unrestricted palletizing. At least eight 25-second positions are required to cover 180 seconds before downtime allowances. Weight and volume 1:1 ratios cannot be equated without density data. ASTM D1002 covers metal-to-metal specimens and does not directly establish glass-to-aluminum joint performance. The stated 100,000 modules in 15 days of two 8-hour shifts also needs reconciliation: two cells at 23.8 seconds each can produce at most about 72,605 modules in that period before downtime.