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Heavy-Duty Knife Coater for High-Viscosity Coatings | Fully Customizable Knife-Over-Roll Coating Machine

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Heavy-Duty Knife Coater for High-Viscosity Coatings | Fully Customizable Knife-Over-Roll Coating Machine

Brand Name : OSMANUV

Model Number : Specification

Certification : ISO9001

Place of Origin : CHINA

MOQ : 1 set

Price : Negotiation

Payment Terms : T/T

Supply Ability : Negotiation

Delivery Time : 30-45days

Packaging Details : WOOD PACKAGING

Voltage : 220V,380V,380V/220V,220V/380V,380V/50HZ

Condition : New

Product name : SGUV-650 small uv coater machine with Coating Width 630mm,High Speed Automatic Digital Uv Coating Machine,Hot melt roll coating machine roll to roll uv coating machine,SGUV-650B Automatic UV coating machine,photo album UV coating machine

Coating speed : adjustable,150-500m2/h,0-5 meters/min,2.5m/min,can be set by yourself

Color : You can decide,rainbown and so on,golden,Customized,sliver

Coating width : 650mm,910mm Coating,440mm

Usage : Spot uv coating machine,digital prints protect

Material : PP,self-adhesive laser material,bottle glass,Metal,PVC

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Heavy-Duty Knife Coater for High-Viscosity Coatings | Knife-Over-Roll Coating Machine for Rubber, Adhesive & PVC – Customizable
Product Overview

A knife coater (also known as a knife-over-roll coater or doctor blade coater) is a versatile coating machine that applies a precise, controlled layer of liquid or paste-like material onto a moving substrate. The coating thickness is determined by the gap between a doctor blade (knife) and a backing roller or the substrate itself.

This technology is ideal for high-viscosity coatings (500 - 100,000+ cP) that cannot be easily applied by roller or curtain coaters. Typical coating materials include:

  • Adhesives (PSA, hot melt, solvent-based)
  • PVC paste (plastisol)
  • Rubber compounds (latex, SBR, natural rubber)
  • Battery electrode slurries (anode/cathode)
  • Ceramic slurries
  • Flame retardant coatings for textiles
  • PU (polyurethane) coatings
  • Silicone release coatings
Technical Specifications
Parameter Standard Range Customizable Option
Coating Width 500 mm / 1000 mm / 1300 mm / 1600 mm ✔ Yes (up to 3000 mm)
Line Speed 5 - 50 m/min (standard) ✔ Yes (up to 150 m/min)
Coating Thickness (wet) 20 - 500 µm ✔ Yes (up to 2000 µm)
Viscosity Range 500 - 50,000 cP ✔ Yes (up to 200,000 cP with heating)
Substrate Type Paper, film, nonwoven, textile, foil, rubber sheet ✔ Yes (any flexible material)
Substrate Thickness 0.02 mm - 5 mm ✔ Yes
Knife Type Knife-over-roll, air knife, floating knife ✔ Yes (interchangeable)
Backing Roller Chrome-plated steel / rubber-coated / stainless steel ✔ Yes
Coating Material Adhesive, PVC, latex, PU, ceramic slurry, battery paste ✔ Yes
Drying Method Hot air (electric/gas) / IR / UV ✔ Yes (multi-zone custom)
Tension Control Open-loop / closed-loop load cells ✔ Yes
Power Supply 380V / 400V / 415V, 50/60Hz, 3-phase ✔ Yes (custom voltage)
Control Type PLC + HMI touchscreen ✔ Yes (remote control optional)
Key Applications
  • Battery manufacturing: electrode coating (lithium-ion anode/cathode slurries)
  • Adhesive tape & label: PSA (pressure-sensitive adhesive) coating on release liner
  • Textile & nonwoven: flame retardant, PU coating, latex backing, waterproofing
  • PVC flooring & artificial leather: PVC paste coating on fabric or release paper
  • Rubber sheet & gasket: rubber compound coating on fabric or release film
  • Ceramic & green tape: ceramic slurry coating for multilayer capacitors (MLCC)
  • Paper & packaging: silicone release coating, hot melt adhesive coating
  • Construction materials: asphalt / bitumen coating for roofing membranes
Customization Options
  • Working width: from 300 mm (lab/pilot) to 3000 mm (industrial)
  • Knife type: knife-over-roll, air knife, floating knife, or knife-on-blanket
  • Backing roller material and hardness: chrome, rubber, stainless steel
  • Coating head positioning: manual micrometer or automatic servo-controlled gap adjustment
  • Drying oven: length, number of zones, heating method (electric/gas IR + hot air)
  • Web path: horizontal, vertical, or combination
  • Cleanroom class: ISO 5/7/8 for battery or medical applications
  • Explosion-proof design for solvent-based coatings
  • Integration with upstream (mixing, degassing) and downstream (slitting, laminating) equipment
  • Automatic viscosity control with inline viscometer
  • Edge masking system for stripe coating
Key Features
  • Precision gap control - repeatable coating thickness to ±1-3 microns
  • Heavy coating weight capability - up to 2000 µm wet (customizable)
  • Wide viscosity range - from 500 cP to 200,000+ cP with heated knife/roller
  • Quick knife change - for different coating materials or thickness ranges
  • Easy cleaning - knife and backing roller accessible from both sides
  • Automatic thickness feedback (optional) - closed-loop control via online gauge
  • Heated backing roller (optional) - for hot melt or temperature-sensitive coatings
  • Low coating waste - minimal startup and edge loss
  • Sturdy construction - heavy-duty frame for vibration-free operation
  • Recipe storage - recall coating parameters for different products
Support and Services
  • Free coating trials - we test your material in our lab on a pilot knife coater
  • Process optimization support - we recommend knife type, gap, speed, and drying parameters
  • On-site installation and commissioning (optional)
  • Operator and maintenance training (on-site or video)
  • 12-month warranty + lifetime remote technical support
  • Fast spare parts supply (knives, backing rollers, pumps, thermocouples)
  • Annual service contract with preventive maintenance
Frequently Asked Questions
Q: What is the difference between a knife coater and a roller coater?
A: A knife coater is better for high-viscosity, thick coatings (e.g., PVC paste, battery slurry). A roller coater is better for lower viscosity. We can customize either type or combine them.
Q: Can I coat both sides of a substrate?
A: Yes, we offer customizable two-sided (dual-head) knife coaters with sequential or simultaneous coating.

Product Tags:

Heavy-duty knife coater machine

      

Customizable knife-over-roll coater

      

UV coating machine for high-viscosity

      
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