Lip Plates: slot_gap_range 50-500 μm, coating_width 100-3000 mm

Component Specifications

Definition

Lip plates are critical precision components in slot-die coating heads that form the narrow gap through which coating fluids are extruded onto substrates. They consist of two parallel plates (upper and lower) that create a precisely controlled slot opening, typically ranging from 50 to 500 microns. The plates feature precisely machined surfaces and edges that determine coating bead stability, wet film thickness uniformity, and coating width control. Lip plates work in conjunction with the coating die body and manifold to distribute coating fluid evenly across the entire coating width.

Working Principle

Lip plates operate by creating a precisely controlled gap between two parallel surfaces through which coating fluid is extruded. The upper and lower plates form a slot that meters the coating material onto moving substrates. Fluid pressure from the manifold forces coating material through the slot, where the gap height determines the wet film thickness. The plates' edge geometry and surface finish control the coating bead formation and stability, while the slot width determines the coating application width. Precise alignment and parallelism between the plates ensure uniform coating distribution across the entire substrate width.

Materials

Stainless steel (316L, 304), tool steel (D2, A2), hardened steel, tungsten carbide, ceramic coatings (Al2O3, CrN), with surface finishes of Ra 0.1-0.4 μm for precision applications.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Flatness	≤5 μm/m
Coating Width	100-3000 mm
Slot Gap Range	50-500 μm
Material Hardness	45-65 HRC
Surface Roughness	Ra 0.1-0.4 μm
Temperature Range	20-200°C
Operating Pressure	0.1-5 bar
Parallelism Tolerance	±2 μm over full length

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 1101, ISO 1302, DIN 7167, DIN 4768

Parent Products

This component is used in the following industrial products

Slot-Die Coating Head

A precision dispensing component that applies electrode slurry onto current collector foils in a controlled, uniform manner.

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Engineering Analysis

Risks & Mitigation

Wear and tear from abrasive coatings
Corrosion from chemical exposure
Misalignment causing coating defects
Thermal expansion affecting gap dimensions
Contamination leading to coating imperfections

FMEA Triads

Trigger: Abrasive particles in coating fluid
Failure: Increased surface roughness and gap enlargement
Mitigation: Implement filtration systems, use hardened materials, establish regular inspection schedules

Trigger: Thermal cycling during operation
Failure: Dimensional changes and loss of parallelism
Mitigation: Use materials with low thermal expansion, implement temperature control systems, allow thermal stabilization before operation

Trigger: Improper cleaning procedures
Failure: Surface damage and contamination buildup
Mitigation: Establish standardized cleaning protocols, use appropriate cleaning tools and solvents, train operators on proper handling

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Slot gap tolerance: ±2 μm, Parallelism: ±2 μm over full length, Flatness: ≤5 μm/m, Surface roughness: Ra 0.1-0.4 μm

Test Method

Coordinate measuring machine (CMM) verification, optical profilometry for surface finish, laser interferometry for flatness, precision gauge blocks for gap measurement

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Lip Plates

Manufacturer profiles associated with Lip Plates.

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Frequently Asked Questions

What factors determine lip plate selection for specific applications?

Lip plate selection depends on coating fluid viscosity, required coating thickness, substrate width, coating speed, and material compatibility. High-viscosity fluids require wider gaps, while precision coatings need tighter tolerances and superior surface finishes.

How often should lip plates be inspected and maintained?

Lip plates should be inspected daily for wear, damage, or contamination. Regular maintenance includes cleaning after each batch, checking parallelism monthly, and recalibrating alignment quarterly. Replacement is typically needed every 6-24 months depending on usage.

What are common signs of lip plate wear or damage?

Common signs include uneven coating distribution, streaks or lines in the coating, increased coating thickness variation beyond ±5%, visible scratches or dents on plate surfaces, and difficulty maintaining stable coating bead formation.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Lip Plates