Double‑Head Vacuum Coating Machine

• Working width: 350 mm
• Workpiece Height Range :3 – 90 mm
• Minimum Workpiece Length: 800 mm
• Total Equipment Power : 20 kW
• Applicable Paint Types: PE, PC, PU, UC, NC, UV, water‑based paints, and more
• Application : Vacuum coating machine is widely used for the high‑speed, uniform coating of straight‑line wood workpieces – such as door frames, baseboards, window casings, picture frames, curtain rods, flooring strips, wall panels, and various profiled mouldings. 

The double‑head vacuum coating machine (also known as a twin‑head vacuum sprayer or vacuum painting line) is a specialised automated finishing system designed for the high‑speed, uniform coating of straight‑line wood workpieces – such as door frames, baseboards, window casings, picture frames, curtain rods, flooring strips, wall panels, and various profiled mouldings. Unlike conventional open‑air spray booths, this machine operates within a sealed vacuum chamber, using high‑pressure atomisation to apply liquid coatings – including UV paints, water‑based primers, PU, NC, PE, PC, wood oils, and waxes – onto three or four sides of the workpiece simultaneously.

The dual‑head configuration allows the application of two different coating materials (e.g., primer and topcoat, or two‑component paints) without interrupting production, making it the ideal choice for workshops that require frequent colour or material changes while maximising throughput and minimising waste.

1. Dual‑Head Independent Coating System

• Equipped with two separate spray heads, each independently controllable for paint type, flow rate, and spray angle.

• Supports two‑component paint systems (e.g., PU, epoxy) without the need for frequent cleaning and refilling.

• Enables seamless switching between clear coats and white paints – dramatically reducing downtime and simplifying multi‑colour production.

2. Vacuum‑Assisted Closed‑Loop Recycling

• Overspray is immediately captured by the vacuum airflow, filtered, and returned to the storage tank for reuse.

• Coating material utilisation is increased by 30% to 50% compared to conventional spraying, directly lowering raw material costs and reducing hazardous waste.

3. High‑Quality Stainless Steel Construction

• The vacuum spraying chamber and paint tank are both fabricated from SUS304 stainless steel, laser‑cut and welded for precision and corrosion resistance.

• The cylindrical paint tank features a smooth interior surface, making cleaning and colour changeover quick and simple.

• The paint circuit includes a pneumatic ball valve that automatically returns unused paint to the tank when the machine is idle – eliminating waste and preventing clogging.

4. Precision Control and Smart Adjustment

• Servo‑driven automatic positioning quickly adapts to different workpiece sizes, enabling rapid product changeover.

• A vacuum pressure gauge provides real‑time data for consistent process control.

• A constant‑temperature heating system (3 kW × 2) surrounds the tank, ensuring uniform paint viscosity.

• Full PLC control with a touch‑screen HMI – all electrical components are from leading international brands (Schneider, Omron, etc.), ensuring reliability and ease of use.

5. Robust Mechanical Components for Long‑Term Reliability

• High‑performance vacuum blower (12.5 kW) from a reputable Taiwanese brand for stable suction.

• Conveyor belt from Siegling – heat‑ and wear‑resistant for smooth, stable transport.

• Conveyor motor and VFD from top Taiwanese manufacturers; TR or LK bearings for extended service life.

• Machine frame of cold‑rolled steel with powder coating; conveyor beam of aluminium alloy for aesthetics and rigidity.

1. Workpiece Feeding – The linear profile (e.g., a door frame or baseboard) is placed onto the conveyor belt and moves into the sealed vacuum coating chamber at a controlled speed (0.5–40 m/min).

2. High‑Pressure Atomisation – Paint is pumped from the storage tank to the spray heads, where it is atomised into a fine mist by high‑pressure air or hydraulic pressure. The two heads can apply the same or different coatings independently.

3. Vacuum Deposition – Inside the vacuum chamber, the atomised paint is uniformly drawn onto all exposed surfaces of the workpiece – including the top, bottom, and side faces (up to four sides) – ensuring complete coverage of grooves, recesses, and profiles without runs or misses.

4. Recycling & Recovery – Excess paint mist is carried by the vacuum airflow to a recovery unit, where it is condensed, filtered, and returned to the storage tank for immediate reuse. The closed system minimises VOC emissions and keeps the workshop clean.

5. Continuous Output – The coated workpiece exits the chamber and is ready for drying or further processing. With adjustable conveyor speed, the system matches your production line requirements for maximum efficiency.

This vacuum coating machine is specifically engineered for straight‑line workpieces of various materials – solid wood, MDF, plywood, gypsum, and more. It excels on:

• Door and window frames – Casings, jambs, architraves, and sills.

• Baseboards and skirtings – Flat or profiled, with excellent groove coverage.

• Picture frames and decorative mouldings – Complex cross‑sections with fine details.

• Flooring strips and decking – Engineered wood and laminate components.

• Furniture slats and components – Bed rails, crib slats, chair backs, and table aprons.

• Kitchen cabinet doors and edge‑banding – Narrow strips and decorative profiles.

• Louver components and window shutters – Quick changeover with interchangeable moulds.

• Architectural wall panels and ceiling battens – Including sauna boards and acoustic profiles.

• Outdoor fencing and garden structures – Waterproof and weather‑resistant coatings.

• Plaster and MDF decorative trim – For interior design and construction.

• Round rods (e.g., billiard cues, fishing rods) – 360° uniform coating without overlapping.