Products Description
Spring Flocking Line
The core of the spring flocking line process lies in creating a uniform and firm flocking layer on the spring surface through a continuous sequence of "Surface Treatment → Gluing → Flocking → Curing". This ultimately enhances the spring's sound insulation, wear resistance, corrosion resistance, and aesthetic properties. It is mainly applied to the processing of spring products in the automotive, furniture, electronics, and other industries.
1. Core Process Steps (Taking Automated Production Line as an Example)
1.1 Spring Preprocessing
First, the spring undergoes cleaning and surface activation to remove oil stains, rust, or oxide layers from its surface. Common methods include alcohol wiping or low-temperature plasma treatment. This ensures the subsequent adhesive can adhere tightly and prevents flocking detachment.
1.2 Precision Gluing
An automated gluing system (equipped with a visual positioning module) is used to uniformly spray polyurethane or acrylic-based adhesive onto the spring surface. The glue layer thickness is controlled between 50-150μm, and the gluing path is adjusted according to the spring's spiral structure to ensure no missed spraying or glue accumulation.
1.3 Electrostatic Flocking
Immediately after gluing, the spring is moved into an electrostatic flocking chamber. Nylon or polyester flock (1.5-3mm in length) is negatively charged by an electrostatic generator, then vertically adsorbed onto the spring's adhesive layer under the action of electric field force. This forms a uniformly covered flocking layer, with a coverage rate required to reach over 98%.
1.4 Curing and Shaping
The flocked spring is sent to a tunnel-type constant-temperature curing oven. It is baked at a constant temperature of 80-120℃ for 5-8 minutes to fully cure the adhesive, ensuring a firm bond between the flock and the spring surface. Some processes add a cooling step after curing to prevent spring deformation caused by high temperatures.
1.5 Post-Processing and Inspection
Excess flock on the spring surface is removed (via a brush or negative pressure suction). Subsequent quality inspections are then conducted, including flock adhesion testing (no detachment when torn by hand), appearance inspection (no missing flock or color difference), and dimensional review. This ensures the product meets relevant standards.
2. Key Process Parameter Control
| Process Link | Core Parameters | Control Purpose |
|---|---|---|
| Gluing | Glue layer thickness: 50-150μm; Spraying pressure: 0.3-0.5MPa | Ensure adhesive adhesion; avoid glue accumulation, sagging, or insufficient glue |
| Electrostatic Flocking | Electrostatic voltage: 30-50kV; Flock density: 80-120g/㎡ | Ensure vertical and uniform adsorption of flock; prevent flock lodging or gaps |
| Curing | Temperature: 80-120℃; Time: 5-8 minutes | Achieve full curing of the adhesive; improve the bonding strength of the flock |
3. Common Process Types
