What is the Chamber Blade for UV Spot Coating Machine
Jun 30, 2026
What is the Chamber Blade for UV Spot Coating Machine
The Chamber-type doctor blades (closed-loop doctor blade systems) are primarily used in varnishing machines to provide a closed, uniform supply of coating liquid (or varnish) and to control the thickness of the varnish layer by precisely scraping away excess varnish. They effectively prevent solvent evaporation and foaming, enabling high-speed, high-quality packaging finishes.
What's the strength of the Chamber Blade?
• Precise metering and control: A dual-scraper structure within the sealed system precisely removes excess coating liquid from the anilox roller surface, ensuring a uniform and stable amount of varnish transferred to the substrate.
• Suppressing foaming and evaporation: The sealed chamber isolates air, significantly reducing bubble generation during the varnishing process and effectively minimizing solvent odor release and viscosity changes in the coating liquid.
• Achieving high speed and high quality: Maintaining consistent chamber pressure even at high speeds results in excellent gloss and scratch-resistant properties, improving workover efficiency.
• Isolating impurities: The enclosed environment prevents external dust and debris from entering the system, protecting the anilox roller from damage.
