Brief Introduction to the Automotive Electric Tailgate Spring Adhesive Flocking Production Line

The Automotive Electric Tailgate Spring Adhesive Flocking Production Line is an automated processing equipment specifically designed for springs used in automotive electric tailgates. Its core function is to form a rubber-flocking composite layer on the spring surface through a continuous "adhesion-flocking" process, ultimately enhancing the sound insulation, wear resistance, and sealing performance of the electric tailgate springs. It serves as a key supporting equipment in the production of automotive electric tailgate systems.

1. Core Components

The design of this production line centers around three core requirements: "precision adhesion, uniform flocking, and stable curing". It mainly consists of 4 major systems:

1.1 Workpiece Conveying and Positioning System

The equipment adopts a deceleration-driven flat conveyor chain, equipped with custom-made tooling fixtures. These fixtures can adjust the clamping method according to different specifications of power tailgate springs (such as coil springs and torsion bar springs), ensuring no deviation of the springs during conveying. Its positioning accuracy is ±0.05mm, providing a stable foundation for subsequent adhesion and flocking processes.

1.2 Adhesion System

It is equipped with a high-precision automatic glue application valve and a visual positioning module. The visual system recognizes the surface contour of the spring in real time and controls the glue valve to spray adhesive (usually polyurethane-based adhesive) along a preset path. The glue application thickness can be precisely adjusted (50-150μm), avoiding sagging caused by excessive glue or flocking detachment caused by insufficient glue.

1.3 Flocking System

This system includes an electrostatic flocking machine and a fluff recycling device. The electrostatic generator charges nylon fluff (typically 1.5-3mm in length) with negative electricity, which is then evenly adsorbed onto the adhesive-coated spring surface under the action of electric field force. Excess fluff is recycled through a cyclone separator, with a recovery rate of over 90%, thereby reducing raw material waste and environmental dust.

1.4 Curing and Cooling System

It adopts a tunnel-type constant-temperature curing oven and an air cooling device. The temperature of the constant-temperature zone in the curing oven is set to 80-120℃ (adjustable according to the type of adhesive), and the baking time is 5-8 minutes to ensure firm adhesion between the adhesive and the fluff. Subsequently, the springs are rapidly cooled to room temperature by the air cooling device to prevent deformation caused by high temperatures.

2. Working Process

The production line adopts a closed-loop process of "loading → positioning → glue application → flocking → curing → cooling → unloading" with a high degree of automation. Each production line only requires 1-2 operators for monitoring.

1. Loading and PositioningWorkers install the electric tailgate springs to be processed onto the conveying tooling. The tooling automatically clamps the springs and conveys them to the adhesion station, where the visual system completes the spring position calibration.

2. Adhesion and FlockingThe glue valve sprays adhesive along the preset path. Immediately after, the springs are conveyed to the flocking chamber, where the electrostatic flocking machine completes fluff adsorption while recycling excess fluff.

3. Curing and CoolingThe flocked springs are sent to the curing oven for rubber-flocking curing, and then cooled by the air cooling device.

4. Unloading and InspectionAfter cooling, the springs are unloaded. Quality inspectors conduct adhesion tests (no fluff detachment when gently torn by hand) and appearance inspections (uniform fluff without gaps). Qualified products proceed to subsequent assembly processes.

3. Core Advantages

1. High Processing PrecisionThe combination of visual positioning and servo conveying ensures uniform adhesion and flocking, with a fluff coverage rate of over 98%. This meets the strict sound insulation requirements of automotive electric tailgate springs (the telescopic noise of springs is reduced by 15-20dB after flocking).

2. Excellent Efficiency and EconomyA single production line can process 80-120 springs per hour, which is 4-6 times more efficient than manual processing. The fluff recycling system reduces raw material waste, ensuring controllable long-term operating costs.

3. Strong AdaptabilityBy adjusting tooling and programs, it can adapt to the specifications of electric tailgate springs for different vehicle types (such as sedans and SUVs) and support mixed production of multiple varieties.

4. Compliance with Industry StandardsThe adhesive performance of the processed springs complies with the automotive industry standard QB/T 4853-2015 (Adhesive Bond Strength Test Standard). Its temperature resistance range is -30℃ to 80℃, suitable for the complex operating environment of automobiles.

4. Application Scenarios

This equipment is mainly used for the surface treatment of coil springs and torsion bar springs in automotive electric tailgate systems, catering to the production needs of electric tailgates for mainstream automotive brands (such as Volkswagen, Toyota, BYD, etc.). As a core processing equipment for automotive component suppliers and electric tailgate assembly manufacturers, it directly affects the sound insulation performance and service life of electric tailgates during opening and closing.

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