Production at Handan Risun - A Modern Melamine Veneer Factory

Handan Risun (Sunbird) is a modern melamine veneer factory. Inside, the factory is a well-organized environment. The distinctive aroma of heated resin lingers in the air. Automated production lines, following a defined process, precisely transform particleboard substrates into beautiful and durable veneers. The core of the entire production process lies in precise control of accuracy, temperature, and pressure.

The meticulous craftsmanship of the substrate and the meticulous preparation of the veneer paper

Step 1: Raw Material Preparation

At the beginning of the production line, neatly stacked particleboard sheets are fed one by one onto a conveyor belt by an automatic feeder. On the other side of the line, rolls of melamine-impregnated film paper are loaded onto a reel. This paper, already saturated with melamine-formaldehyde resin and additives at an upstream impregnation plant, feels slightly sticky and brittle. Because it is extremely sensitive to the environment, the workshop must maintain a constant temperature and humidity (typically 22 ± 2°C, 50%-60% relative humidity) to prevent it from absorbing moisture and "pre-curing." According to the order, workers precisely switch between rolls of paper in various patterns, such as walnut, oak, pure white, or stone.

Step 2: Hot Pressing—The Fusion of Soul

This is the core of the entire process, where the fate of the raw board and the impregnated paper is fused.

At the laying station, a mechanical device precisely applies two layers of pre-cut impregnated paper to the upper and lower surfaces of the raw board. This "sandwich" is then fed into a continuous flatbed hot press. The hot press has already been preheated to the set temperature (typically between 180°C and 220°C).

When the slab enters:

High pressure (approximately 25-35 kg/cm2) is instantly applied, like a giant's palm, expelling all air from the interior and firmly bonding the paper to the substrate.

The high temperature rapidly activates the resin, causing it to melt, flow, and partially penetrate the surface of the raw board. Within a precisely controlled timeframe (for thin sheets, this may take as little as 15-25 seconds), the resin undergoes a cross-linking reaction, transforming from a linear structure into a dense network, and fully solidifying.

At this moment, the decorative texture on the impregnated paper is permanently fixed by the resin, while the surface wear layer forms a hard, transparent, and scratch-resistant "armor." Engineers in the control room closely monitor the winding temperature, pressure, and speed curves on the screen, as any slight fluctuation represents a potential quality risk.

Step 3: Cooling and Curing—From Passion to Calmness

The temperature of the newly-exited sheet is still over 90°C, and the resin has not yet reached its final strength. The sheet is soft and easily deformed. It must not be handled directly at this point.

The sheet is immediately fed into a cooling and turning machine. On a giant, star-shaped roller, the sheet is slowly turned while being evenly blown by strong, cold air. This "quenching" process is crucial, stabilizing the resin molecular chains and imparting the final physical properties (such as hardness, wear resistance, and dimensional stability) to the veneer. After sufficient cooling, the sheet becomes hard and cool to the touch.

Step 4: Precision Cutting and Quality Inspection—The Pursuit of Every Millimeter

After cooling, the boards are irregular in size and have excess "flaking" on the edges, requiring final finishing.

Edge Trimming: The boards are fed into a precision saw for vertical and horizontal cutting. Equipped with an ultra-thin alloy blade, the electric saw removes burrs to millimeter-level precision, based on the order size (e.g., 1220mm x 2440mm). Vacuum dust removal ensures a smooth, chip-free cut surface.

Final Inspection: This is the final stage of quality control. Under a dedicated inspection light, quality inspectors scrutinize the surface of each board with a keen eye:

Gloss and Color: Are there any color variations or uneven gloss?

Surface Defects: Are there any scratches, stains, bubbles, or wrinkles on the paper?

Edge Quality: Are there any chipped edges, missing corners, or incomplete veneer finishes?

Qualified products are sorted by pattern and grade, and each stack of boards is separated by spacers to prevent scratches. Finally, they are tightly wrapped in stretch film and affixed with labels indicating the pattern, specifications, environmental rating, and production batch. Like possessing identity cards, they await shipment to the furniture manufacturing workshop, becoming part of cabinets, wardrobes, desks, and every corner of modern life.

Conclusion

The core competitiveness of Handan Risun-modern factory stems from its precise control of process parameters and meticulous attention to detail. From sanding accuracy, hot pressing curves, to cooling rates, rigorous control of every step determines the final product quality. This is essentially a systematic project that transforms the principles of materials science into stable and efficient mass production, thereby achieving the value upgrade of panels from basic substrates to high-performance decorative panels.