How does a Reciprocating Spray Painting Machine achieve uniform coating on wooden workpieces, avoiding runs and orange peel effects?
Publish Time: 2025-12-09
In the woodworking industry, surface coating is not only a crucial process for protecting wood but also a vital factor determining the final texture and market value of the product. Traditional spraying methods often result in defects such as runs or orange peel due to uneven operation and uncontrolled parameters, severely impacting yield and aesthetics. The Reciprocating Spray Painting Machine effectively solves these problems by integrating intelligent sensing, precise control, and efficient atomization technology, achieving highly uniform and consistent coating on wooden workpieces.
1. Intelligent Workpiece Contour Recognition for Precise Spraying Area Definition
To avoid paint waste and edge accumulation, the equipment is equipped with a high-sensitivity workpiece grating detection system. This system scans the workpiece's shape, size, cuts, and location in real time before it enters the spraying area. The control system dynamically adjusts the spray gun's start and stop timing and spray width accordingly, ensuring that paint only covers the effective area. For example, for cabinet doors with openwork carvings or irregularly shaped stair railings, the system automatically "avoids" the openings, preventing paint from penetrating and accumulating, causing runs. This "on-demand spraying" strategy not only improves paint film uniformity but also significantly saves 15%–30% on paint.
2. Eight independently adjustable spray guns for ideal atomization and coverage
The equipment is equipped with eight high-performance Iwata spray guns from Japan, each with independently adjustable air pressure. By precisely controlling the compressed air flow, the spray guns atomize the paint into micron-sized particles, forming a fine and uniform paint mist. The fine atomized particles adhere more easily to the wood surface, reducing the risk of runs caused by excessive local thickness. Simultaneously, the coordinated reciprocating motion of multiple guns ensures smooth layering and transitions of the paint film, effectively suppressing orange peel texture. Combined with a frequency converter-regulated spray chamber air pressure and a two-stage air filtration system, a stable airflow environment is maintained, preventing dust from interfering with paint surface formation.
3. Stable delivery and dynamic extrusion system ensure continuous and uniform paint supply
Spray uniformity depends not only on the spray guns but also on a stable paint supply and workpiece delivery. The equipment utilizes an imported acid and alkali resistant PE belt conveyor, ensuring smooth and vibration-free operation and guaranteeing that workpieces pass through the spraying area at a constant speed. Crucially, its intelligent extrusion and recycling system: during operation, the extrusion rollers automatically rise, and the extrusion pressure is precisely adjusted by cylinders, with roller surface runout ≤0.01mm, ensuring consistent paint thickness when transferred to the steel rollers. Subsequently, a pneumatic scraper evenly scrapes excess paint back into the oil tank, while a rodless cylinder-driven rubber scraper quickly guides the paint into the collection bin, preventing accumulation and oxidation. Upon shutdown, the system automatically recovers residual paint, eliminating dripping contamination.
The entire machine is driven by a Taiwan Shihlin servo motor, coupled with a 7-inch touchscreen and an advanced PLC controller, enabling digital setting and real-time monitoring of spraying parameters. Operators can preset process formulas for different wood species and paint types, which the system automatically calls and executes. Furthermore, the professional paint circuit supports forward and reverse flushing of the pipelines, ensuring more thorough cleaning and preventing old paint residue from affecting the quality of new batches, further guaranteeing paint film consistency.
The Reciprocating Spray Painting Machine effectively avoids sagging and orange peel effects because it highly integrates the four key processes of "sensing, control, execution, and recycling," forming a closed-loop, intelligent, and stable spraying ecosystem. From workpiece recognition to atomized spraying, from smooth conveying to paint recycling, every detail serves the ultimate goal of "uniformity." In modern woodworking manufacturing, which pursues high quality, high efficiency, and low waste, such intelligent painting equipment is undoubtedly a key tool for enhancing product competitiveness.
