Form-in-Place Gasket Dispensing
Precision form-in-place gasket dispensing for aerospace enclosure and housing sealing — achieving EMI shielding and environmental sealing without pre-cut gasket material.
Precision Formed-in-Place Gasket Dispensing for Aerospace Enclosures
Form-in-place gasket (FIPG) dispensing has become the preferred sealing method for aerospace electronic enclosures and housings, replacing pre-cut gasket material with a precisely dispensed, continuous bead that eliminates gasket material waste, simplifies inventory for complex enclosure geometries, and achieves more consistent sealing performance than mechanically installed pre-formed gaskets that can shift or compress unevenly during assembly. Many aerospace enclosures also require electromagnetic interference (EMI) shielding continuity in addition to environmental sealing, adding a conductivity requirement to the gasket material beyond simple moisture and dust exclusion.
The dispensing challenge is maintaining constant bead cross-section around enclosure profiles that are often considerably more complex than typical consumer electronics housings — incorporating multiple corners, cable pass-throughs and mounting bosses within a single continuous sealing path — while precisely controlling bead height to achieve target compression under the enclosure's specific assembly force. Where EMI shielding is required, the dispensed conductive gasket material must maintain continuous electrical contact around the full enclosure perimeter, since any gap in the conductive path creates an RF leakage point.
SANCO servo-controlled dispensing systems and desktop visual dispensing machines deliver the continuous path bead control and CCD vision alignment required for form-in-place gasket dispensing across the complex enclosure geometries and dual environmental/EMI sealing requirements characteristic of aerospace electronic housings.
Why Aerospace FIPG Dispensing Demands Complex-Geometry, Dual-Function Precision
Aerospace enclosures often require both environmental sealing and EMI shielding continuity from the same dispensed gasket, around considerably more complex profiles than typical consumer housings.
Complex Enclosure Profile Continuity
Aerospace enclosures frequently incorporate multiple corners, cable pass-throughs and mounting bosses within a single continuous sealing path; the FIPG bead must maintain constant cross-section throughout this complexity without gaps or thin sections.
EMI Shielding Continuity Requirements
Where EMI shielding is required, the dispensed conductive gasket material must maintain uninterrupted electrical contact around the full enclosure perimeter; any gap in this conductive path creates an RF leakage point that compromises the enclosure's shielding effectiveness.
Bead Height Consistency for Target Compression
FIPG bead height must be precisely controlled to achieve the specific compression ratio the enclosure's assembly force and gasket material are designed for; inconsistent bead height produces uneven compression and inconsistent sealing performance.
Dual-Material Dispensing for Combined EMI/Environmental Sealing
Enclosures requiring both EMI shielding and environmental sealing may need two different gasket materials dispensed in coordinated paths, requiring precise material sequencing and positioning within a single production cycle.
Altitude Pressure Cycling and Vibration Durability
FIPG seals on aerospace enclosures experience the same altitude pressure cycling and sustained vibration as other aerospace sealing applications, requiring gasket material formulated to maintain seal integrity across this demanding service profile.
Rework and Repair Compatibility
Aerospace maintenance operations often require enclosure disassembly and reassembly for component access; FIPG material and dispensing process must support clean removal and reliable re-application during MRO cycles.
Key Capabilities for Aerospace Form-in-Place Gasket Dispensing
Continuous Path Bead Control on Complex Profiles
Servo-controlled dispensing path maintains constant bead cross-section around multi-corner enclosure profiles, cable pass-throughs and mounting bosses.
CCD Vision Flange Alignment
Optical positioning compensates for housing fixture variation and part-to-part tolerance, keeping the gasket bead centred on the sealing flange on every cycle.
Electrically Conductive FIPG Material Compatible
Dispensing platform handles electrically conductive gasket formulations required for EMI shielding continuity applications.
Dual-Material Sequential Dispensing
Multi-barrel configuration dispenses environmental sealing FIPG and EMI-shielding conductive gasket materials in coordinated paths within a single automated programme.
Precision Bead Height Control
Closed-loop volumetric dosing maintains bead height within tight tolerance, achieving the specific compression ratio target enclosure designs require.
Altitude & Vibration-Rated FIPG Material Support
Compatible with FIPG formulations engineered to maintain seal integrity under altitude pressure cycling and sustained flight vibration.
Offline Path Programming from Enclosure CAD
Import enclosure CAD data to auto-generate dispensing toolpaths for complex multi-feature sealing flange profiles without manual path teaching.
Inline Aerospace Enclosure Assembly Integration
SMEMA-compatible conveyor integration links SANCO FIPG dispensing equipment directly into aerospace enclosure assembly lines between housing preparation and final leak/EMI test stations.
The Form-in-Place Gasket Dispensing Process Step by Step
FIPG dispensing must maintain continuous bead coverage and, where required, EMI shielding continuity across complex aerospace enclosure geometries. SANCO equipment is calibrated for every stage.
Housing Load & Vision Alignment
Enclosure housing half is loaded and CCD vision captures sealing flange fiducials to calculate exact path offset.
Continuous FIPG Bead Dispensing
A continuous formed-in-place gasket bead traces the full sealing flange perimeter, maintaining constant cross-section through complex profiles.
EMI-Shielding Gasket Dispensing
Where required, an electrically conductive FIPG material is dispensed along a coordinated path for RF shielding continuity.
Housing Assembly & Compression
Housing halves are mated under controlled force, compressing the gasket to target height.
Cure & Environmental / EMI Test
FIPG cures per specification; sample units undergo environmental seal and EMI shielding effectiveness testing.
Aerospace FIPG Material Types & SANCO Compatibility
SANCO dispensing machines handle the formed-in-place gasket material types used across aerospace enclosure environmental and EMI sealing applications.
| Material Type | Viscosity Range | Cure Method | Typical Application | SANCO Compatibility |
|---|---|---|---|---|
| Standard RTV Silicone FIPG | 40,000 – 200,000 mPa·s | Moisture cure | Environmental sealing for non-EMI-critical aerospace enclosure housings | Recommended |
| Electrically Conductive Silver-Filled FIPG | 50,000 – 250,000 mPa·s | Moisture or thermal cure | EMI shielding-continuity gasket for enclosures requiring RF shielding effectiveness | Recommended |
| UV-Cure FIPG Compound | 20,000 – 100,000 mPa·s | UV 365 nm, 5–30 s | Fast-cure gasket dispensing for high-throughput aerospace enclosure assembly lines | Recommended |
| Fluorosilicone Wide-Temperature FIPG | 30,000 – 180,000 mPa·s | Moisture or thermal cure | Extended temperature range and fuel-resistant gasket for engine-adjacent or fuel-system enclosures | Recommended |
| Low-Compression-Set FIPG for MRO Rework | 40,000 – 200,000 mPa·s | Moisture cure | Gasket formulation supporting clean removal and reliable re-application during maintenance access | Recommended |
Frequently Asked Questions
How does SANCO maintain FIPG bead continuity around complex enclosure profiles?
Servo-controlled continuous path dispensing, with paths generated from enclosure CAD data, maintains constant bead cross-section through multi-corner profiles, cable pass-throughs and mounting bosses without manual path teaching. Contact our application engineers to review path programming for your enclosure design.
Can SANCO equipment dispense EMI-shielding conductive gasket materials?
Yes. SANCO dispensing platforms handle electrically conductive silver-filled FIPG formulations required for EMI shielding continuity, with precise path control ensuring uninterrupted conductive contact around the full enclosure perimeter.
Does SANCO support dispensing two different gasket materials on the same enclosure?
Yes. Multi-barrel dispensing configurations support coordinated dispensing of environmental sealing FIPG and EMI-shielding conductive gasket materials within a single automated production programme.
How does SANCO ensure consistent bead height for target gasket compression?
Closed-loop volumetric dosing maintains bead height within tight tolerance across the full sealing flange perimeter, achieving the specific compression ratio target that the enclosure's assembly force and gasket material design require.
Does SANCO support FIPG materials compatible with MRO rework and reassembly cycles?
Yes. SANCO dispensing systems are compatible with low-compression-set FIPG formulations engineered to support clean removal and reliable re-application during aerospace maintenance and repair access cycles.
Where can I learn about other aerospace dispensing applications?
Visit our Applications section for guides covering thermal interface material dispensing, lightweight structural bonding and connector sealing and potting. For equipment specifications, see our dispensing machine product pages.
Ready to Optimize Your Production?
Talk to our engineers about a dispensing or coating solution tailored to your consumer electronics line.