PU Air Filter Machine

Yongjia polyurethane air filter machine is specially designed for the production of automotive air filters. It is equipped with a high-precision metering pump and a dynamic mixing head to ensure that the foam edge is well sealed and leak-proof.

Overview

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PU Air Filter Machine

Yongjia's polyurethane air filter dispensing machine is specifically designed for automotive air filter production. It supports multi-station simultaneous production, increasing production capacity by over 30%, and maintains stable reaction times through an intelligent temperature control system. Backed by a five-year warranty and comprehensive process training, it helps you efficiently and reliably mass-produce high-quality air filters.

Polyurethane Automatic Air Filter Gasket Machine

✓Manufacturer Since 2006✓Exported to 60+ Countries✓Up to 5-Year Warranty✓OEM / ODM & CE✓Turnkey + Training Support

PU Air Filter Making Machine — Overview

A PU air filter making machine (also called an air filter gasket machine) meters and mixes two-component polyurethane and dispenses it onto filter end-caps to bond the pleated media and form a tight sealing gasket. It is the core equipment for producing automotive and industrial air, oil, fuel and cabin filters, where a uniform PU end-cap guarantees a leak-free seal.

On a typical line the dispensing head pours liquid PU into a rotating mold while the filter element is set in place; the polyurethane cures into the end-cap and gasket in one step. Yongjia builds PU air filter producing machines with two-component metering, programmable pouring paths, rotary tables and customizable output to match your filter sizes and cycle time, with OEM and CE support for exporters.

The same metering platform drives our low pressure PU foaming machine and PU gasket dispensing machine.

Machine Structure

Automatic PU air filter gasket foaming machine: twin sandwich-jacket material tanks, a PLC touch-screen control cabinet and an XY servo pouring head served by a rotary worktable.

How It Works

A PU air filter making machine forms the sealing end-cap and gasket in one automated pour. Two-component polyurethane is metered, mixed and dispensed by a servo-driven head onto the filter element while a rotary table cycles finished parts through.

L — o

M — e

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C — u

A — u

Technical Parameters

Foam application	Flexible PU filter end-cap / gasket
Injection output	3–18 g/s
Mixing ratio	3:1 (adjustable)
Injection pressure	0.05–0.1 MPa
Injection time	0.5–99.99 s (0.01 s resolution)
Metering precision	≤ ±0.5%
Repeat injection accuracy	±1%
Mixing head	2,800–5,000 rpm, forced dynamic mixing
Material tank volume	30 L × 2 (sandwich heating jacket)
Metering pump	JR6 / JR2.4
Material temperature control	±2 °C, 3 × 3 kW heaters
Compressed air	0.6–0.8 MPa, 600 NL/min
Max filter size	Round up to Ø500 mm (product up to Ø550 mm)
Power supply	3-phase, 380 V / 50 Hz
Rated power	≈13 kW (≈4 kW in normal operation)
Machine dimensions	1900 × 1500 × 2000 mm
Weight	1500 kg

Core Components

Three-layer A/B material tanksAcid-resistant stainless-steel inner tanks (argon-arc welded) with a spiral-baffle heating jacket and outer PU-foam insulation for even heating, stable viscosity and low energy use.

High-precision metering pumpsJR-series metering pumps hold dosing error to ≤ ±0.5% for a consistent, repeatable PU shot on every filter.

Forced dynamic mixing headA new-type self-cleaning head mixes polyol and isocyanate at 2,800–5,000 rpm — even, low-noise mixing with automatic solvent-free cleaning and air-dry.

XY servo pouring systemA two-axis servo-driven head follows a programmed path for round, oval, square and special end-cap shapes up to Ø550 mm.

PLC touch-screen controlA PLC and touch-screen HMI set the pour path, timing and cycle; head position and material timing are controlled directly for easy, repeatable operation.

Rotary worktableA variable-frequency gear motor rotates the worktable, indexing filter elements between load, pour and unload for continuous, high-efficiency production.

Applications

The automatic air filter gasket foaming machine is used wherever a polyurethane end-cap seals a filter element:

Automotive filters — air, oil, fuel and cabin-air filters for cars, trucks and off-road vehicles.
Industrial & dust filters — cartridge and panel filters for dust collectors, compressors and gas turbines.
HVAC & home filters — panel and pleated filters for air-handling units and household appliances.

Round, oval, panel and cartridge shapes are all supported by changing the end-cap mold; send your filter dimensions and annual volume for a tailored line layout.

Frequently Asked Questions

What is a PU air filter making machine?

It is a polyurethane dispensing machine that pours and cures PU end-caps and gaskets onto air, oil or fuel filter elements, bonding the media and creating a leak-free seal in one step.

How accurate is the PU metering?

The metering pumps hold dosing error to within ±0.5%, with ±1% repeat injection accuracy, so every end-cap receives a consistent PU shot for a reliable seal.

What size filters can it handle?

The standard configuration pours round filters up to Ø500 mm and products up to Ø550 mm; panel and oval shapes are produced by changing the end-cap mold, and larger sizes are available on request.

What is an air filter gasket machine used for?

It forms the polyurethane gasket and end-cap that seal a filter inside its housing, ensuring all air or fluid passes through the media rather than around it.

What filters can it produce?

Automotive air, oil, fuel and cabin filters, plus industrial and HVAC filter elements—round, oval or panel shapes depending on the mold.

How does PU filter end-cap pouring work?

Two-component polyurethane is metered and mixed, then poured into a rotating end-cap mold holding the filter element. The PU rises slightly, embeds the pleats and cures into a rigid, sealed end-cap.

Can the machine be customized, and what is the MOQ and lead time?

Yes—output, number of heads, mold tooling and automation are configurable, with OEM/ODM and CE support. Send your filter dimensions and volume for an exact quote and lead time.

Get a Price Quote

Tell us your output, mold and automation requirements — our engineers reply within 24 hours with an exact price, configuration and lead time. OEM/ODM & CE supported.

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