The coating head is the core component of the coating machine, responsible for uniformly and accurately applying the coating (such as paste, adhesive, etc.) onto the surface of the substrate (e.g., film, paper, aluminum foil), directly determining the quality and performance of the final product.

product-3000-1035

Type	Working principle	Typical Applications
Narrow slit extrusion coating head	Under pressure, the slurry is uniformly extruded through precision machined narrow slits, forming droplets between the moving substrate and transferring them	High end fields such as lithium battery electrodes/separators, OLED displays, optical films, perovskite solar cells, etc
Comma scraper coating head	Control the coating amount through the gap between the precision comma shaped scraper and the substrate	Lithium battery electrodes (in some scenarios), solar backsheet, adhesive tape, protective film, etc
Micro gravure coating head	Transfer the slurry onto the substrate through a roller with small pits on the surface, and the density of the pits determines the coating amount	Products such as optical films, flexible circuits, and medical dressings that require high thickness accuracy
Scraper type coating head	The coating amount is controlled by the pressure between the blade and the substrate, and the angle and pressure can be adjusted	Traditional coated products such as paper, wallpaper, fabrics, etc. require low precision in scenarios

Taking the most common narrow slit extrusion coating head in the field of precision coating as an example, its core structure is relatively simple, but its design is exquisite:

Upper and lower molds: Two precision metal modules that are the main structural components.

Gasket: Located between the upper and lower molds, the width of the discharge slit can be precisely adjusted by replacing gaskets of different thicknesses, thereby changing the coating line width.

Internal flow channel (cavity): There is a specially designed cavity inside the lower mold (such as rack type, single cavity type, etc.) to ensure that the slurry can be evenly distributed throughout the entire coating width

When choosing a coating head, it is usually necessary to comprehensively consider three factors: material properties, product accuracy requirements, and production efficiency:

High precision, ultra-thin coating: preferred for narrow slit extrusion or micro gravure coating heads.

High viscosity, high-speed production: comma scraper is an economical and efficient choice.

Universality, traditional coating: scraper type coating head can meet the requirements.

Delivery time	20~30 days.
Payment terms	TT 30% advance,70% before shippment
Warranty time	1 year after sales service
Trade Terms	EXW,FOB, CIF, etc
MOQ(Minimum Order Quantity)	1PC
Package	Wooden Case
Country of Origin	China