Proprietary nitrogen purging method HANCE | LIGHTNINGCURE LC-L5G: Linear irradiation type UV-LED units

LC-L5G are high output and adopting proprietary air-cooling method.

Conventional UV-LED light sources cannot achieve high-throughput, but LC-L5G can achieve it.

This video introduces the proprietary nitrogen purging method HANCE for the LIGHTNINGCURE LC-L5G: linear irradiation type UV-LED unit. Please take a look at this.

Proprietary nitrogen purging method HANCE (*1) enables efficient nitrogen purging

HANCE (*1) is our patent-pending nitrogen purging method that ensures efficient nitrogen purging just in the area directly under the UV-LED light source.
Simply installing the HANCE, which consists of the purge block and the assist block, on the LC-L5G facilitates effective nitrogen purging.

*1: HANCE is only available for model GH-103A.

Feeding speed up to 150 m/min (*2) with nitrogen flow rate of 27 NL/min

The nitrogen purging area, which practically covers the entire light source, is now reduced significantly and limited only to the area directly under the UV-LED light source, thereby limiting the amount of nitrogen to the minimum. The design accommodates a feeding speed of 150 m/min (*2), with a nitrogen flow rate of 27 NL/min.

*2: This is the maximum feeding speed at which a satisfactory nitrogen purging effect is still obtained at the specified nitrogen flow rate through our simulation.

Two key parts of proprietary nitrogen purging method HANCE

Purge block

The purge block sprays nitrogen onto the nitrogen purge area.
A metal filter mounted at the nitrogen inlet of the purge block helps control the nitrogen flow pressure. Pressure control ensures a uniform nitrogen supply to multiple units without the need for flow meters. The tapered internal structure also accelerates the flow of nitrogen as it sprays outward.

Under ordinary circumstances, oxygen penetrates into the nitrogen purge area during feeding of printed materials. However, accelerating the flow of nitrogen makes it function as an air curtain to prevent unwanted intrusion of oxygen during feeding of printed materials.

With tapered structure

Without tapered structure

With tapered structure

Without tapered structure

Assist block

The assist block prevents outflow of the filled nitrogen and retains nitrogen within the nitrogen purge area.
We verified the effectiveness of this assist block by simulating a nitrogen fluid. Without countermeasures, there is almost no drop in the nitrogen outflow even when partition panels are installed at various positions. The assist block, however, is designed to create a distance between the nitrogen accumulation area and the low pressure region, and so efficiently prevents nitrogen outflow.