One Tunnel Furnace with Two Independent Conveying Lanes: Performance Overview of Dual-Channel IR Tunnel Furnace

One tunnel furnace equipped with two independent conveying lanes delivers doubled output capacity and nearly 60% lower energy consumption. Far from a conceptual design, this is the actual performance of the newly released dual-channel IR tunnel furnace from Dongguan Dingfeng Automation Equipment Co., Ltd. Developed for 24/7 continuous curing production lines, the equipment has been officially launched for global market sales.

· Dual-Lane Design: Boosted Productivity & Optimized Footprint

Conventional single-lane tunnel furnaces suffer evident drawbacks in production tact time and space utilization. This model delivers a concise and effective solution with two parallel independent conveying lanes, each with an effective width of 250 mm to process two rows of product carriers simultaneously.

**Upper Conveying Line**: Running speed 0.4~4 m/min for formal curing processes

**Lower Return Line**: Running speed 1~8 m/min for rapid empty carrier circulation to form a closed-loop conveying system

With identical overall equipment length, production throughput is nearly doubled and cross-contamination between different products is eliminated. Overall dimensions: 14.5 m(L) × 0.97 m(W) × 1.66 m(H). Section layout: 0.5 m feeding section + five 2 m-long heating zones + 0.5 m transition section + 3 m cooling section + 0.5 m discharging section. The conveying surface height is adjustable at 900±25 mm for seamless connection with upstream and downstream equipment.

· Combined IR + Hot Air Circulation: Uniform Heating Without Cold Spots

Consistent temperature distribution is critical to guaranteed curing quality. The furnace adopts medium-wave vacuum infrared IR lamps as primary heat sources; each of the five heating zones is fitted with twelve 1kW IR lamps. Infrared radiation enables inside-out rapid product curing to shorten heat-up duration and extend stable constant-temperature holding period.

Meanwhile, a 750W long-shaft top-mounted motor drives a 9-inch multi-blade impeller to build a downward-pressing hot air circulation system. Hot air flows downward through perforated stainless steel plates and IR lamps to fully sweep product surfaces before circulating back via side air ducts. Such hybrid heating eliminates all cold spots and restricts overall temperature deviation within ±5°C. Its operating temperature ranges from ambient to 230°C, and the chamber can heat up to 150°C within 10 minutes, satisfying curing requirements for most adhesives, printing inks and surface coatings.

·Five Independently Controlled Zones with PID & SCR: Precision Control & Superior Energy Saving

The five heating zones feature separate temperature regulation, each equipped with Yatai LCD self-tuning PID temperature controllers and Taishong SCR thyristor output modules. Compared with conventional on-off control, SCR realizes stepless power adjustment for slighter temperature fluctuation and reduced contactor wear. All operation controls are centrally mounted on the cold air hood at the discharge end for intuitive parameter setup.

The rated total power of the whole machine is 73kW, while stable constant-temperature operation only consumes around 31kW, achieving prominent energy conservation. Adjustable fresh air intake openings and five 4-inch-diameter natural exhaust ports are arranged on the top; one 200W forced exhaust fan is installed respectively at feed and discharge ends, alongside four double-inlet fans plus two heavy-duty exhaust fans in the cooling zone to timely discharge waste gas and maintain a clean workshop environment.

· Safety Interlock & User-Friendly Maintenance

Reliable safety performance and convenient servicing are essential for long-term nonstop production. The HC-IR250×2-14500 is integrated with multi-layer protection configurations:

**Electrical Protection**: Earth leakage circuit breaker, overload protection, over-temperature heating cutoff and abnormal transmission alarm. An emergency stop switch with protective housing is installed beside the discharge outlet to avoid accidental triggering.

**Mechanical Interlock**: The furnace cover is side-opened via electric push rods with mechanical safety support struts; electric push rods are locked when support struts remain installed to prevent accidental cover falling and bodily injury.

**Heating Interlock**: Heating power cuts off automatically once the furnace cover is opened during normal heating to avoid high-temperature scalding; an indicator light lights up upon full closure of the furnace cover.

The inner furnace chamber is constructed with mirror-finish stainless steel via full argon arc welding for seamless, easy-to-clean interior. The thermal insulation consists of 120kg-grade aluminum silicate rock wool plus an air insulation layer, limiting outer shell surface temperature to no higher than ambient +10°C and lowering radiant heat in workshops.

· Fast Lead Time & Comprehensive After-Sales Support

Dingfeng Intelligent commits to completing design, fabrication and in-plant commissioning within 30 working days upon contract signing. Three field technicians finish on-site installation, wiring and operator training within three days after equipment delivery. The whole machine enjoys a 12-month warranty covering free repair service (excluding consumable parts and damage caused by improper human operation). If remote phone troubleshooting fails, after-sales engineers arrive at the customer site within 48 hours. Post-warranty service only charges reasonable working-hour fees and component cost, with emergency sourcing of long-lead spare parts available within 72 hours.