Low Pressure PU Foaming Machine — Overview
A low pressure PU foaming machine meters and mixes two or three liquid polyurethane components (polyol, isocyanate and optional additives) through a mechanical mixing head and dispenses the reacting blend into a mold or cavity. Unlike high-pressure systems, a low pressure polyurethane foaming machine mixes at roughly 2–20 bar using a rotary stirrer, which makes it cost-effective, easy to maintain and well suited to flexible and semi-rigid molded foam.
Because the mixing head recirculates between shots, a low pressure foam dispensing machine handles frequent color and formula changes, making it a flexible choice for varied molded parts. Yongjia builds low pressure PU foaming machines with customizable output, two- or three-component metering, programmable shot weight and tailored mixing heads to match your part size and cycle time.
Typical applications include PU gaskets and filter end-caps, memory foam pillows, automotive and bike seats, insoles, decorative cornices, faux stone and anti-fatigue mats. For higher output rigid foam and panel lines, see our high pressure PU machine; for gasket sealing specifically, see the PU gasket dispensing machine.
Frequently Asked Questions
What is a low pressure PU foaming machine?
It is a polyurethane dosing system that meters polyol and isocyanate (plus optional color or additives), mixes them mechanically in a recirculating mixing head at low pressure (about 2–20 bar), and pours the mixture into a mold to form flexible or semi-rigid PU foam.
What is the difference between low pressure and high pressure PU foaming machines?
A low pressure machine mixes mechanically and requires solvent flushing, but costs less and is ideal for flexible molded foam, frequent formula changes and small-to-medium output. A
high pressure PU machine uses impingement mixing (100–200 bar), needs no solvent flush, and suits high-volume rigid foam such as insulation panels and refrigerators.
What can a low pressure PU foaming machine produce?
How many components and what output can the machine handle?
We offer two- and three-component low pressure PU foaming machines. Output (g/s), tank capacity, number of mixing heads and shot weight are all configured to your application—tell us your part weight and target cycle time and we will size the system.
Can the machine be customized, and what is the MOQ and lead time?
Yes. Mixing head, output, automation level and pouring layout are customizable. As a China manufacturer we support OEM/ODM and CE certification. Contact us with your part specification for an exact configuration, price and lead time.